Proper use and maintenance of high temperature melt YLE Crank Position Sensors

High temperature melt pressure sensor is mainly in the high temperature fluid medium pressure measurement and control, mainly used in rubber machinery, polyester and other equipment, in which an important role. Therefore, the correct use and maintenance became known as the operation staff. Damage to correct installation usually high temperature melt pressure transducers are due to its installation position inappropriate caused. If the sensor to installation in the small hole or irregular shape of Kong Zhong, Crankshaft Position Sensorsit is possible to cause vibration membrane sensor has been damaged by the impact. Select the appropriate tools to process the mounting hole, is helpful to control the installation hole size. In addition, mounting torque suitable to form a good seal. But if the installation torque is too high and is easy to cause the detachment of high temperature melt pressure sensor, in order to prevent the occurrence of this phenomenon, usually in the sensor is installed before the threaded portion with anti off compounds. In the use of such compounds, even if the installation torque sensor is very high, is also very difficult to be moved. Check the installation hole size if the installation hole size doesn't fit, high temperature melt pressure sensor in the installation process, the threaded portion of it is susceptible to wear. This will not only affect the sealing performance of equipment, but also makes the sensor can not fully play its role, and even may cause security risks. Mounting holes are suitable only to avoid the thread wear, usually by mounting hole measuring instrument to detect the mounting holes can be, in order to make the appropriate adjustments. Select the appropriate position when the installation Engine Water Temperature Sensor of high temperature melt pressure sensor is too close to the line, not the molten material may wear sensor at the top; if the high temperature melt pressure sensor is installed in too on the location, the stagnation region between the high temperature melt pressure sensor and screw rod stroke may produce melt materials, melt where possible degradation, pressure signal may also transfer distortion; if the high temperature melt pressure sensor too deeply into the machine barrel, screw may be in the rotation process touch the high temperature melt pressure sensor at the top of the damage caused by. In general, the barrel temperature melt pressure sensor can be located in front of the screen, melt pump before or die. Keep mounting hole mounting hole cleaning to keep clean and prevent frit blockage to ensure the normal operation of equipment is very important. Before being clean extruder, melt pressure sensor all should be removed from the barrel to prevent damage. In the dismantling of the sensor, the melt may flow into the mounting hole and hardened, if the melt these remains have not been removed, when installing the high temperature melt pressure sensor again it may cause the top damage. A cleaning tool package to the melt residue removal. However, the cleaning process repeated may deepen the damage of high temperature melt pressure sensor mounting holes caused by. If this happens, we should take measures to increase the high temperature melt pressure sensor in the mounting hole position. To avoid low interference in the extrusion process, the plastic raw materials, from the solid to the melt state shall have adequate "soak time". If the extruder at the start of a pre production has not yet reached operating temperature, so the high temperature melt pressure sensor and the extruder will be a certain degree of damage. In addition, if the high temperature melt pressure sensor was removed from the extrusion machine cold, material may damage caused by vibration membrane adhesion in a high temperature melt pressure sensor at the top. Therefore, before removing the high temperature melt pressure sensor, should confirm the barrel temperature is high enough, the material inside the machine barrel in softening state. Carefully clean
In the cleaning of the extruder barrel with a wire brush or special compounds, high temperature melt pressure sensor should be all removed. Because of the vibration film the two cleaning methods may cause high temperature melt pressure sensor damage. When the tube is heated, should also be high temperature melt pressure sensor is removed and a soft cloth to wipe the top wear no holes, and high temperature melt pressure sensor also need to use the drill guide sleeve clean and clean. Keep dry despite the circuit design of high temperature melt pressure sensor can withstand the harsh environment of the extrusion processing, but the majority of high temperature melt pressure sensor is not absolutely waterproof, in the humid environment is not conducive to the normal operation of. Therefore, to ensure the water cooling device of extruder barrel of water will not leak, otherwise it will cause adverse effects on the sensor. If the sensor to exposure to water or damp environment, should choose a strong special high-temperature melt pressure sensor water repellency. To prevent the pressure overload even overload design sensor measurement range of the highest can reach 50% (beyond the ratio of the maximum range), from the viewpoint of safety equipment operation should be considered to avoid risks, the best choice of the measured pressure in the high temperature melt pressure within the sensor range. In most cases, the best range of selected high temperature melt pressure sensor should be 2 times the measured pressure, so that even if the extruder operating at extremely high pressure, can also avoid the damage of high temperature melt pressure sensor.

Low will affect the long-term high-grade automotive oxygen sensor sensitivity

Sensor There are many types of internal use , wherein the oxygen sensor in the engine that is essential. Recently, some users say the car will affect the long-term high-grade low- oxygen sensor sensitivity , that really so? Xiaobian to tell you the answer .The formation of coke and coke formation on the general impact of the engine for three reasons : First, the use of " low- grade " bad driving habits. There prolonged idling and low-speed driving. On the other hand is mainly the use of the purity and quality of gasoline . Carbon impact is mainly reflected in the engine cold start problems , less than the required cold idle speed, idle severe cold will turn off after the hot car idling low . Also lead to decreased engine power , poor acceleration , fuel consumption increases ; engine exhaust emission deterioration , it also shortens the spark plugs, oxygen YLE Engine Position Sensor, catalytic ternary is life. The most important is the carbon of the engine will cause jamming of the piston ring , piston ring sealing performance , resulting in increased oil consumption , resulting in engine burning oil , shortening the life of the engine . Remove carbon deposits and effects of regular cleaning methods are generally divided into three steps , fuel injectors and intake cleaning can remove part of the coke, and be able to soften deep coke, oil tank can add agent to sustained cleaning carbon recovery nozzle atomization , keeping the oil flow, restore the power of the engine, eliminating the engine cold start problems , unstable idle , such as failure to improve fuel economy and extend spark plugs, oxygen YLE Crankshaft Position Sensor Replacement, catalytic converters , engine life. When Wei -off power enhancer plus 5% of the amount of oil available in the market mix , polymer nanospheres hundreds of millions in the role of " Brownian motion " , the heat will be more than ten meters per second velocity, so that it can be in the lubricant evenly, stable distributions. Meanwhile , using the kinetic energy given to the thermal motion of the continuous passage of oil and mechanical impact surface of the deposited abrasive, carbon and grease produced potent " physical washing " effect, restored or ensure clean working environment of the engine , eliminating the impurities possibility of causing engine failure. Since a huge amount of polymer nanoparticles uniformly distributed in the lubricant to add gravel becoming similar to cement concrete strength enhancement principle , making significantly improve the strength of the oil film , oil seal , seismic performance greatly enhanced. Because of poor air tightness engine , the larger the gap caused by channeling oil under channeling combustion residue , corrosion , oil aging failures can quickly eliminate or alleviate . In addition, due to increased cylinder pressure , exhaust valve scavenging momentum greatly improved , making the exhaust pipe carbon is strongly purge , exhaust pipes become very clean. Measures to prevent carbon generated models to choose the grade of gasoline according to the manufacturer 's instruction manual , but it should be noted that the label represents gasoline octane gasoline , reflecting the gasoline antiknock quality of gasoline and gasoline can not label On the phase problem and recommended to the regular reputable gas station , due to crude oil and refinery process , coupled with the sale of commercial gasoline market is not a high -quality gasoline, gasoline components containing sulfur , phosphorus, especially in the higher olefin content and oxidation stability is poor, olefin oxidation condensation will form a gelatinous when the engine of internal combustion work, and the engine crankcase exhaust and intake of dust particles in the collection , the throttle body , intake manifold , etc. to form coke. Also driving habits and conditions of use is also very important , bad driving habits " low grade " driving causing incomplete combustion gas mixture easily generated carbon ; avoid prolonged engine idling , the vehicle for a long time at low speeds , should always run a run high-speed , high-speed driving can make mixed combustion , improved fuel economy and can reduce coke formation, to restore the sensitivity of the oxygen sensor , clean the spark plug electrodes between carbon and catalytic converters surface.

As the car is inseparable from the sensor fish without water

As the car is inseparable from the sensor fish without water , some users may be asked to sensors in the car really so important? Today who say that we should first role in the automotive air flow Crankshaft Sensor Replacement .We know that the fuel injection of correct starter air - fuel ratio to ensure complete combustion of the fuel or the fuel consumption , it is necessary to monitor the air flow sensor . Air flow sensor has become one of the most important automotive sensors, it determines vehicle fuel mileage and exhaust emissions fuss important role , which monitors the amount of air entering through the inlet inside the boot , and convert it into voltage signal is then transmitted to the starter control module. Starter control module based on a signal transmitted in the past to determine how much fuel and air mixture required and the fueling system to inform automotive spark plug when the ignition for each cylinder .When the car accelerates air flow Engine Water Temperature Sensor response is a sign of stupidity wear or failure , but also that the starter does not inject fuel moderate , not too little is too much.By immediate fuel price, a functioning air flow sensor may reduce the frequency of operation of the pump with the frugal fuel quantity is worth the price of the sensor. Therefore, if the air flow sensor failure on the car is worth the change .

Smart grid development is inseparable from the current sensor security

Urban consumption continued to increase , the construction of the smart grid has become an inevitable trend , however, also need to get the power of security, this time showing the current sensor indispensable role . Also in the process of current Engine Water Temperature Sensor technology , and other aspects of the design and effectiveness of continuous improvement in the industry for more than the current flow measurement has a major role Fiber-optic current sensors for example, China launched a XDGDL-1 fiber-optic current sensor system to achieve a full digital line current sensing loop control system , with good stability and linearity and high sensitivity to meet a large range of process precision measurement requirements.Meanwhile , the system developed a field- winding telescopic structure, easy toinstall, can avoid the interference of stray magnetic fields , bus eccentricity measurement error is less than plus or minus 0.1 %, to achieve a high-precision signal conversion program for the rectifier control devices provide high-precision analog and digital communication interface standard .With the construction of the smart grid , the requirements for increasingly high current Engine Cooling Temperature Sensor , current sensor in the future to sensitivity, stability , and many other improvements , to move higher sensitivity , stronger immunity , lower power , smarter design, more compact , integrated and improved temperature stability direction, the better for the smart grid construction and upgrade services.

Photoelectric type crankshaft position sensor is installed in the distributor

Photoelectric type crankshaft position sensor is installed on the distributor, which is composed of signal generator and signal light hole plate. The signal panel and electrical axis
To rotate together, there are 360Camshaft Position Sensor lithographic gap signal disc outer ring, signal generating crank angle 1 °; a 6 light holes spaced 60 DEG are uniformly distributed within the signal generated by, crank angle 120 °, 1 of which aperture is wide, to produce a signal relative to the TDC of cylinder 1. Signal generator is arranged on the shell of distributor, is composed of two light emitting diodes, two photosensitive diode and circuit. The light emitting diode is opposite to the photosensitive Crankshaft Positioning Sensordiode. Between the signal disc is positioned on the light emitting diode and photodiode, because the light hole signal disc, the light and shade alternating phenomenon. When the beam of light emitting diode according to the photodiode, photosensitive diode voltage; when the light emitting diode beam is blocking, photosensitive diode voltage of 0. The voltage signal shaping amplification circuit part, namely to electronic control unit for conveying the crank angle is 1 ° and 120 ° signal, the electronic control unit calculates the engine speed and crankshaft position according to the signal

Tension sensor performance indicators which

Tension sensor performance indicators which ?Mainly include linearity error , hysteresis error , repeatability error , creep , zero temperature characteristics and sensitivity temperature characteristics. Tension Crankshaft Positioning Sensorhas the advantage of high accuracy , wide measurement range , long life , simple structure , frequency response Coolant Temperature Sensor characteristics, and can work in harsh conditions , easy to realize miniaturization, holistic and species diversification . The disadvantage is that there is greater for large strain nonlinear , the output signal is weak , but you can take certain compensation measures. Therefore, it is widely used in automatic testing and control technology .

Proximity Sensor Selection Tips

Ground sensor applications has been particularly broad application of its model , different functions are also different, its main feature is the small size, easy toinstall, inexpensive , how do we determine what you want to do a proximity sensor to specifically look . First ,
the proximity sensor according to the measured object by selecting the material . If the required sensing distance is shorter , inductive proximity sensors can be easily and efficiently detect any type of metal objects. If the distance , you can use the photoelectric Camshaft Positioning Sensor. If the sensor is very far away , it is best to use on the radio or reflective photoelectric sensors. Secondly, since the capacitive proximity sensor can detect the material is very much, but the sensing distance corresponding to recently, and inductive proximity sensors similar . If you use a capacitiveCrankshaft Sensors , then the volume of the object to be detected can not be too small to meet the minimum sensing object of the sensor volume requirements. Ultrasound and diffuse proximity sensors can detect a wide range of materials , and detection distance is relatively long . However, in the detection of objects with irregular surfaces may cause problems . Finally , and more for the proximity sensor selection criteria , or to rely on the characteristics of the measured object , and to take
into account Crankshaft Positioning Sensor installation and environmental factors . Once all these issues are clear , then it can be selected from a number of sensors a suitable type. Understanding of the proximity sensor selection step that we can more quickly and accurately selected their own needs sensors. Of course, this is just a selection procedure , to treat specific problems but also specific coping

How to correctly judge the photoelectric sensor output no signal

Photoelectric sensor is a photoelectric sensor element as a sensing element , widely used in the automation field . Photoelectric sensors for material handling, error detection , process manufacturing automation, object detection can also be used over long distances or fault is detected. Photoelectric sensors detect the distance of the object has a unique advantage , but in the specific use of the environment, there will be some technical problems , which we need methodical technical judgment. In the application of photoelectric sensors to detect objects in the distance , a lot of users will encounter problems when using photoelectric sensors to detect objects is no output signal after , making it impossible for subsequent data analysis. Most people see no signal sensor output may often be some wrong judgment , such as some people on the direct determination of Shaft Position Sensor bad reason. But the reason is not all like that, photoelectric sensor detects an object after no output , there may be many reasons , we need to do it step by step investigation . The first thing to consider is wiring or configuration problems . For beam photoelectric sensor must be cast by the light unit and a light unit used in combination with both ends requires power ; while retroreflective Engine Temperature Sensor probe and must be retroreflective sheeting used in combination ; same time, the user must provide a stable power supply to the sensor , if it is DC power supply , you must confirm the positive and negative , should the positive and negative connection error will cause the output signal is not . The reason analysis is to consider Camshaft Position Sensor itself , we also need to consider the problem is to detect the location of objects , if the detected object is not in the detection area , so that the detection is futile. Test object must be detected in the sensor area , that is, can sense the optical range. Secondly, we must consider the optical axis of the sensor there is no alignment problem , on the radio type of light-emitting portion and a light receiving unit must be aligned with the optical axis , the corresponding portion of the retroreflective type sensor must be aligned with the optical axis and the reflector . The same should also consider whether the detected object is the standard sensing object or minimum standard sensing object , object detection can not detect an object less than the minimum standard , thus avoiding lead shot , reflective not well detect transparent objects , like a reflection on detecting the color of objects is required, the deeper the color , the more recent detection distance . If the above conditions can be excluded to make it clear , we need to do is to detect environmental disturbances . Such as light intensity can not exceed the rated range ; if there is dust environment of the scene , we need our regular cleaning optical sensor probe surface ; or more sensors close fitting , mutual interference ; there is a relatively large impact that electrical interference , if surrounded power equipment , interference must have the appropriate anti-jamming measures . If you have done the above one by one investigation , these factors can be explicitly excluded or no signal output , it is recommended to return factory testing to determine .

Affect the development of the four load cell competition in the industry

Weighing sensors with other sensors industries there is a fierce competition that has the image of brands, services and other civilized gentleman of the dispute , but also change the material for components, spell cost , disposable quality unscrupulous unfair price competition. The competition is mainly the following four points : 1, the price of some electronic weighing products is extremely low , some only one-tenth of the international market price , this factor determines the load cell is no room for maneuver on pricing , forcing production enterprises reducing their quotations and offers many free services , or forcing producers to maintain inventory levels , bear the risk and cost of inventories , the production company profits is therefore reduced ; 2 , misleading consumers, so many users have misunderstood the load cell stability and reliability targets. Some companies are semi-permanent part of the product , are IP67, IP68 sealing level of product protection can be stabilized for ten years at least mention , but will say that this was the vulnerability of the device under load frequently , allowing the user to accept this Shaft Position Sensor prices also accept quality of this product ; 3 , at the expense of product quality for the price , crazy reduce costs, using a variety of means to seize the market , for example, $ 3,000 per tonne instead of one million yuan 40Cr steel the 40CrNiMoA alloy steel load cell elastomer to do with about $ 5 instead of an ordinary strain gauge precision strain Crankshaft Position Sensor to do , without the formation of low-quality low-cost, make a profit ; 4 , lax management and supervision of legal metrology so that some of the production equipment is poor or lacking in personal and corporate load cell is relatively easy to enter the industry , leading to increase productivity and drive down prices, making formal corporate profits dropped significantly , and even non-profit discontinued , difficult. These victims are often Crankcase Position Sensor level of technology , process equipment is good, strict quality control , good after-sales service load cell business, the ultimate victims are the majority of users . On the surface, the price war in recent years is the direct cause of the load cell market crowded, some people and companies in order to profit , survival waged a last resort , and its essence is about leadership and management oversight authority , leadership and management control, supervision and inspection caused by lax .

Further accelerate the pace of intelligent sensors

Today, integrated smart sensor technology has made remarkable development , and domestic sensors have gradually opened up the field of smart sensor market . Now our high-performance multi- sensor micro-controller , along with digital and analog two kinds of output, and the specific requirements for some users , in the original products based on secondary development , and require a very short period , reaching the purpose for the user to save time , but also greatly improving efficiency. Has been widely applied to a variety of fine fields. Insiders said about the future , we can just move a finger, can only via mobile phone or computer and other electronic products can be realized on the control of household goods , to achieve truly automated home , while also through a variety of agricultural products,Crankshaft Position Sensortimely monitoring, for example, to effectively carry out irrigation and spraying , etc., in order to reduce costs and improve earnings. In addition , you can also wear a Camshaft Position Sensor body health data collection, protect people timely understanding of their own health . With intelligent Crankshaft Positioning Sensor , will people's lives changed dramatically , and can be widely applied to the sensor field , such as smart logistics, smart healthcare , smart home , intelligent transportation , industrial automation , environmental protection, financial services industry , fine agriculture, national defense and military , networking , and other areas was smart sensor provides a great market space for development .

Principle and Application of Gas Sensors

The so-called gas sensor is used to detect whether a certain area in the presence of a specific gas and / or capable of continuous measurement of gas component concentration of the instrument. In the coal mine , petroleum, chemical , municipal , medical , transportation , family and other security aspects , commonly used in the detection of combustible gas sensor , combustible , toxic gases or existence , or oxygen consumption and so on. In the electric power industry and other manufacturing fields, but also quantitative measurement of flue gas sensor used in the concentration of each component to determine the combustion of harmful gas emissions and the like. Field of environmental monitoring in the atmosphere , the use ofCrankshaft Position Sensor determine environmental pollution situation , it is very common. Classification of gas sensors from detecting the type of gas , the often divided into combustible gas sensor ( often using catalytic combustion , infrared, thermal conductivity , semiconductor type ) , toxic gas sensors ( generally using electrochemical , metal-semiconductor , photoionization , flame ionization type ), hazardous gas sensor ( often with infrared , ultraviolet , etc. ) , oxygen ( often using paramagnetic , zirconia ) and other Engine Coolant Temperature Sensor ; from the use of the instrument , into the portable and stationary ; obtained from the gas the way the sample is divided into diffuse ( i.e. sensor mounted directly on the object to be measured environment , the measured gas through natural diffusion in direct contact with Car Temperature Sensor element ) , suction ( suction pump is through the use of other means , to be tested gas is introduced into the sensor sensing element detection. based on the measured gas is diluted , can be subdivided into full suction and dilution type, etc. ) ; from the analysis of gaseous components , and is divided into a single formula ( only for specific gas detection ) and compound of formula ( composition for simultaneous detection of multiple gases ) ; press Sensor detection principle , be divided into thermal , electrochemical , magnetic , optical , semiconductor type , such as gas chromatography type .

Thin-film temperature sensor is a new type of temperature sensor

Film temperature sensor is a new type of temperature sensor , working principle and common thermal resistance, thermocouple the same , but it's hot junction thickness of only a few microns . Film temperature sensor because of its small , short response time , high sensitivity, ease of integration , etc., suitable for measuring rapid changes in body temperature over time . Film thermocouple principle was first used by the Germans during the First World War made ​​P.Hackmann and developed a film thickness of only 2um thermocouple sensor for measuring bore bullet shot in the foot after a temperature change . Many scholars from around the world followed the film temperatureCamshaftPositioSensorstructure , method of preparation , performance and prospects a lot of research work , and has made encouraging progress in recent years, is widely used in internal combustion piston top surface of the combustion chamber wall and cutting tips and other transient temperature tests . Domestic Northwestern Polytechnical University, Li Fu-Guo Huang Lu , who developed a new right to film thermocouple temperature sensor for measuring the work surface and the internal die temperature transients ; Xi'an Highway University, developed a money orchids, wall heat transfer for internal combustion engines process analysis of the film Coolant Temperature Sensor; Dalian University of Technology precision & processing , Ministry of Education key Laboratory of Bao yuan et al study and produce for measuring cutting temperature NiCr / NiSi film thermocouples.Developed film temperature sensor is the key to solve the coating resistant , solid , impact and insulating layer between the issues and the difficulty of combining domestic and foreign scholars have done a lot of research on the coating process and produce the corresponding thin film sensors. So far, the researchers have developed a thin-film Engine Water Temperature Sensorcan be well applied in some situations , but its versatility deficiencies , and the cost is high ; simultaneously by technology and material constraints , sensor life are generally more shorter.

Acceleration sensor for detecting inclination compensation

Attitude Control System acceleration sensor and tilt sensor can be said that the interaction , the current tilt sensing applications in gesture recognition interfaces will have great potential. Like, in the construction or industrial inspection equipment and other applications, perhaps people are more inclined to one-hand operation . The other hand do not operate the equipment can be freed or operator controlled barrels standing platform , or for security reasons, to seize the ropes. The operator can simply rotate the probe or device to adjust its settings. Like the above case, the triaxial acceleration Shaft Position Sensor senses the inclination can be like that senses a " rotation ": In the presence of gravity tilt speed measured in a state change is detected changes in the gravity vector , and determining a clockwise direction or counterclockwise . These data clearly not a tilt sensor can detect out, tilt detection can also be used in conjunction with one click recognition , so that the operator can control the device with one hand more. Tilt compensation device location measurement Another major application areas in the GPS or the mobile phone of the electronic compass , for example, there is a well-known problem is that when the compass is not placed parallel to the Earth's surface , it will get an error point , in that kind of application, must calculate a bucket with something inclination relative to the Earth in order to accurately draw weight . Pressure is also subject to the influence of gravity , these sensors contain an offset varies depending on the installation position of Crankshaft Positioning Sensor diaphragm . In all these cases , MEMS accelerometer sensing tilt perform necessary , for error compensation . Perhaps the acceleration sensor and the tilt sensor The combination of more use and control, but due to the acceleration sensor , small size, high performance, acceleration sensor market is still equivalent to posture control in an advantage , people will say it includes accelerometer tilt sensor , and inclination angle Crankcase Position Sensor is the master key to measuring the acceleration sensor can be said tilt sensor creative products.

Piezoelectric sensors are used in the acceleration pressure and force measurements , etc.

Piezoelectric sensors are used in the acceleration, pressure , and the measurement of force, etc. . Piezoelectric acceleration sensor is a common accelerometer. It has a simple structure , small size , light weight, long life and other excellent features. Piezoelectric Accelerometer in aircraft, automobiles, ships, bridges and construction of vibration and shock measurements has been widely used, especially in the field of aviation and aerospace more of its special status. Piezoelectric Coolant Temperature Sensor can also be used to measure the pressure of internal combustion engine is measured with the measurement of the degree of vacuum . Can also be used in military industry, for example, use it to measure the firing guns and bullets in the chamber in the moment of the change and muzzle bore pressure shock wave pressure . It can be used to measure a large pressure can also be used to measure small pressure . Piezoelectric sensors are also widely used in biomedical measurements , such as the decline of ventricular catheter damper is made ​​of a piezoelectric transducer , as measured dynamic pressure is so common , so the piezoelectric Car Temperature Sensor applications is very broad. In addition to piezoelectric sensors , there are manufactured using the piezoresistive effect of piezoresistive sensors, the use of the strain sensor strain effect , these various pressure sensors using different materials and different effects on different occasions to play them unique purpose.

Precautions for replacement load cell

When replacing the load cell is also requiring attention , correct replacement approach allows the sensor is more convenient to install , click Yes precautions. A weighing sensor increases as the rated load , the output of the micro- volts / division signals are reduced , rather than as the load increases, the output signal also increases . This point is often overlooked . So replacing the sensor should be used as much as possible like the original load sensors. To replace the load slightly larger , we should pay attention to electronic scales weighing indicator range is adjustable : If it is not adjustable old display instruments, because the load into a larger sensor, the output of the micro volts / division signal is smaller, not full-scale output, display , DIP adjust achieving its purpose and can not use ; if it is adjustable range weighing indicator ( such as Toledo 8140 series ) , and replaced with a larger Cooling Temperature Sensor payload after the by setting the range, according to the instructions debugging. Also note that , if the load sensor is too large , the output of the micro -volt / div signal is too small , easy to reduce the sensitivity of the scale . (2) For the second force transmission link ( ie, the first lever and the second force transmission power transmission link between the lever ) S-shaped Crankshaft Positioning Sensor  installed in electromechanical integration scale , should pay attention to : Reinstall the sensor after linking rod length with the same length as the original link . On the other hand , is to ensure that the first level of leverage and power transmission link with the first force transmission lever vertical angle of 90 degrees . If there are deviations , the scale will directly affect the accuracy and sensitivity. Link length is too long , a " large scale " phenomenon ; too short , a " small scale " phenomenon . At this point should also note that the link must be in free suspension state , in conjunction with other objects of friction to avoid affecting the sensitivity of the scale . 3 electromechanical integration scale in replacement of Car Sensors debugging, debugging mechanical scales should be based on accurate weighing indicator according to instructions . 4 . Whether electronic or electromechanical integration scale scales , in replacement of the sensor , it must pass through the test before use.

Load cell specific classification

In fact, the classification of the load cell is a lot of ways for each application and production technology are not the same, what is the load cell specific classification . Photoelectric sensors include two kinds of grating and the code disc . Grating Car Sensors  moire grating formed into the angular displacement of the optical signal. Two gratings , one for the fixed grating and the other is mounted on the shaft dial movement grating. Added to the load-bearing stage analyte through force transmission lever system so that the dial shaft rotation , led moving grating rotation, so that it moves with moire . Using photoelectric conversion circuit, and tables , can calculate the number of moves over the moire , measuring the rotation angle of the size of the grating , so as to determine and read out the measured physical quantity . Code disc Cooling Temperature Sensor code disk ( sign board ) is mounted on a shaft of transparent glass dial , above a certain coding method with the scheduled black and white code. Added to the load-bearing platform of the test object by the force transmission lever dial shaft is rotated, the code plate is rotated along with a certain angle . Photocell for receiving light through the code wheel and converted into an electrical signal , and the digital processing circuit , and finally displayed on the monitor represents the measured quality digital . Photoelectric sensors have been mainly used in the mechanical and electrical integration scales . Hydraulic gravity Car Temperature Sensor P-action by the measured object , the hydraulic pressure of the oil increases, the increase is proportional to the degree of P . Increasing pressure measured value , you can determine the quality of the measured object . Hydraulic pressure sensor structure is simple and strong , wide measurement range , but the accuracy is generally not more than 1 /100. Electromagnetic force sensor
It utilizes the load bearing platform with electromagnetic force equilibrium principle. When the load measured object placed on stage , the upwardly inclined end of the lever ; photovoltaic element detected inclination signal is amplified and flows into the coil , electromagnetic force , the lever returns to equilibrium. Counterweight against the currents generate electromagnetic digitizer , you can determine the quality of the measured object . Electromagnetic force Crankshaft Positioning Sensor accuracy, up to 1/ 2000 to 1/ 60000 , but only in the range of tens of milligrams weighing 10 kg. Capacitive sensor which utilizes frequency oscillation circuit capacitor and the electrode distance d, f proportional relations . There are two plates , one fixed and the other one movable . Loading the loading station when the measured object , the leaf spring deflection , the distance between the two plates changes, the oscillation frequency of the circuit also changes . The measured change in frequency measured can be calculated the mass of the load stage . Capacitive sensors less power consumption , low cost , accuracy of 1/200 to 1/ 500 . Variable magnetic Crankshaft Sensor Replacement ferromagnetic element in the form of analyte mechanical deformation under the action of gravity , the internal stress and cause changes in permeability , so that around the ferromagnetic element ( pole ) of the secondary side also changes the induced voltage . The change in the measured voltage can be calculated the force applied to the pole , and to determine the quality of the measured object . Pole change form sensor accuracy is not high , usually 1 /100, applicable to large -tonnage weighing , weighing range of tens to tens of thousands of kilograms .

Thermistor sensor in industrial applications

Thermistor sensor , small size , fast response , high sensitivity , so it is widely used in many fields . Thermistor sensor in industrial applications is very wide, depending on the product model, its scope is also not the same line , specifically the following aspects:A thermistor sensor measurement : As a thermistor temperature measurement sensors are generally relatively simple structure , the price is cheaper . No outside protective layer thermistor can only be applied in a dry place ; sealed thermistor afraid of moisture erosion, can be used in a relatively harsh environment .Since the resistance of the thermistor sensor is large, so the connecting wires and the contact resistance of the resistance can be ignored , so Positioning Sensor at the temperature up to several kilometers of distance measurement applications, multi-use bridge measurement circuit . The principle can also be used as the use of other temperature measurement and control circuit.2 , a thermistor for temperature compensation of Crank Shaft Position Sensor : Thermistor temperature sensor in a certain range to compensate for some of the components humidity . Temperature increases , the resistance increases, causing the temperature errors. And can therefore be of the moving coil circuit will be negative temperature coefficient thermistor manganese copper and then with the resistor in parallel with the series compensation components , in which to offset the error caused by temperature changes .In transistor circuits , logarithmic amplifier, is also commonly used thermistor composition compensation circuit. Compensation due to temperature drift errors .3 , thermistor sensor overheat protection: thermal protection of direct indirect protection to protect profits . The small current case, the thermistor Ect Engine Coolant Temperature Sensorcan directly load string person , to protect the device to prevent overheating damage , for large current applications , can be used for the relay , transistor circuit protection.In either case, the thermal resistance of the device to be protected are close together , so that heat exchange between the full , the event of overheating , the protective effect of the thermistor . For example , the stator winding of the motor thermistor embedded in the mutant and in series with the relay . When the motor is overloaded, the stator current increases , causing fever . When the temperature is higher than point mutations , the current in the circuit can be within a few tens of milliamperes is mutated to tens of milliamps , the relay, in order to achieve thermal protection.4 , the thermal resistance sensor for measuring the liquid level : NTC thermistor sensor is applied to a heating current , its surface temperature will be higher than the ambient air temperature , its resistance is small at this time . When the liquid and higher than its installation height, it would take away the heat of the liquid , so the temperature drops , the resistance increased.Determine its resistance changes , you can know whether the liquid level is below the set value . Oil level in the tank car alarm sensor is produced using the above principle . Thermistor in the car is also used to measure the oil , the cooling water mixed with other .

How the sensor application circuit reduces noise and interference

Sensor circuit sensor circuit noise and interference sources easily received outside or inside some of the irregular noise or interference signal , in fact, the success Engine Water Temperature Sensor design and interference design are inseparable.A low-frequency noiseLow-frequency noise is mainly due to internal discontinuities caused by the conductive particles . In particular carbon film resistors, the carbonaceous material is present inside many small particles , particles are not continuous, the current flows through the resistor will change in conductivity caused by the current changes, resulting in poor contact of a similar arc flash explosion . In addition , the transistor may also have a similar burst noise and flicker noise , and the resistance mechanism which generates discontinuity of particles similar to , but also the degree of doping of the transistor .2 semiconductor device generates shot noisBecause the semiconductor PN junction voltage Crank Shaft Sensor the potential barrier region caused by changes in the cumulative amount of charge in this region changes, which show a capacitive effect . When the applied forward voltage rises , N and P areas of electronic devices in the depletion region of the hole movement , is equivalent to charging the capacitor . When the forward voltage decreases , which in turn make the depletion region away from the electron and hole , the equivalent capacitor is discharged. When the applied reverse voltage, the depletion region opposite variation . When the current flows through the potential barrier region , this change will cause flow through the potential barrier region small fluctuations generated by the current , thereby generating current noise. Its size and noise temperature , △ f is proportional to the bandwidth .3 high-frequency thermal noiseHigh-frequency thermal noise is due to the internal conductor random motion of electrons generated . The higher the temperature , the more intense electron motion . No internal electronic conductor Games in its internal rules the formation of many small current fluctuations , because it is disorderly movement , so its average total current is zero , but it as a component ( or as part of the circuit ) is connected enlarge circuit , its internal current source will be enlarged to a noise , especially in the high frequency band of the work circuit of high frequency noise particularly .

Modular throttle position sensor

Modular throttle position sensor(A) structural features modular TPS Toyota car uses modular throttle position sensor as shown in Figure 2-35a, the principle of the circuit shown in Figure 2-35b. It mainly consists of a variable resistor and the sliding contacts, throttle shaft, idle contact, shell composition. Variable resistor film resistor formed on Crankshaft Sensor board, the variable resistor wiper rotates together with the throttle shaft, sliding arm connected to the output terminal VTA. (2) Combined Combined TPS TPS output characteristics of the output characteristics shown in Figure 2-36. When the throttle is closed or opening is less than 1.2. When the idle contact is closed, its output terminal IDL output low (0V); when the throttle opening is greater than 1.2. When the idle contact is disconnected, the output terminal IDL output high (5V). When the throttle opening change, the variable resistor wiper will immediately rotate the throttle shaft, will be in sliding contact arm slides on film resistor, the Position Sensor output terminal VTA and E, the signal voltage between the ensuing change, as shown in Figure 2-35, the greater the throttle opening degree, the higher output voltage. The linear sensor output signal after A / D converter into a digital signal and then enter the ECU.

Bimetal temperature sensor structure

Bimetallic temperature sensor is the use of a bimetal made ​​of a temperature characteristic of temperature Position Sensor, such as cold start timer switch, which consists of housing, bimetal, heating coils, contacts and the like.
Cold start time switch is a temperature-time switch with threaded connections installed at the outlet of the engine, in order to detect the engine coolant temperature. This switch has a normally closed contact inside its movable arm by a pair of sheet metal. Bimetal thermal expansion coefficient from the two different pieces of metal bonded, as the temperature changes, the two thermal expansion difference between the metal sheet, the temperature is low, the bimetal to maintain the original state; temperature rises to a certain extent when the bimetal to the low thermal expansion coefficient of the metal sheet is bent. Bimetal around which two heating coils, heating the bimetal can bend, so the contacts open. Warm up the engine to a certain temperature, the original closed contact should be disconnected.