YLE Camshaft Position Sensor Disadvantages: three parasitic capacitance effect

Initial capacitance capacitive weighing sensor is small, and the lead capacitance, electronic circuit connected with the sensor and the electronic circuit of the stray capacitance and inside the sensor plate and the surrounding conductors capacitors and other so-called YLE Auto Temperature Sensormissing large parasitic capacitance, not only reduces the sensitivity of the sensor, and the capacitance is often random change, will make the instrument work is not stability, influence the accuracy of measurement. So the cable selection, installation, connection method has strict requirements. For example, with good shielding property, its small distributed capacitance of high frequency electric wire as the lead, lead is thick and short, to ensure the instrument stray capacitance is small and stable and so on, otherwise it can not guarantee the high measurement precision.
It should be pointed out that, along with the material, technology, electronic technology, especially the rapid development of technology, the capacitance weighing sensor has been developing and YLE Engine Coolant Level Sensor constantly overcome shortcomings. The capacitance sensor is becoming a high sensitivity, high precision, low pressure sensor in dynamic, and some special measurement has a promising.

Bimetal temperature sensor

Ferredoxin-type thermistor temperature sensor used to control the radiator cooling fan mounted on the radiator coolant circulation passage.
Maintenance Method Thermal ferrite Engine Water Temperature Sensor are as follows:
When the engine coolant temperature is higher than the predetermined value, if the radiator cooling fan is not running, you should check the radiator cooling fan circuit. First check the wiring connections, check for open circuit, short circuit, and the work of the Working fan relay and thermal ferrite temperature sensor.
Check Shaft Position Sensor thermal ferrite. The thermal ferrite temperature sensor placed in the container, connect the multimeter, while heating at work to check the sensor. Under normal conditions, when the coolant temperature is the predetermined temperature, the sensor is in a conducting state, the meter indicates 0 Ω. Coolant temperature is higher than the predetermined temperature, the sensor should be turned off (non-conducting sensor), the meter indicates the resistance ∞, if the number of the ferrite temperature thermal sensor is damaged and should be replaced.

Working principle of temperature sensors

Working principle of temperature sensors1, the thermal resistance: in accordance with the principles of the resistance wire of the temperature change
2, a thermocouple: a two conductor contact, the junction will have a stable electromotive force; same conductor ends at different temperatures, between the both ends of the electromotive force of a certain size
3, liquid thermometer: is the use of temperature-sensitive liquid thermal expansion of the principle of work
Most of Car Temperature Sensor resistive sensor,
That is, he himself is a resistor, as the temperature changes, the corresponding change in the resistance value, the resistance change of the desired temperature and Crank Shaft Position Sensor is a linear relationship, but which does not actually exist, the general performance to have good linearity within a certain temperature range performance. So when you want to select the temperature sensor for specific models of the original operating temperature range.

Position sensor is composed of three parts of a brushless DC motor system of

Position sensor is composed of three parts of a brushless DC motor system, but also a symbol from the brush DC motor. Its role is to position in the movement detection in the process of the main Car Temperature Sensorrotor, rotor magnet pole position signal into electrical signal, provide the information for the correct logic switching circuit, the turn-on and cut-off control them, which cause the current to the armature winding of the motor changes with the rotor position in order of commutation, car sensorform a rotating magnetic field the air gap step type, drive permanent magnet rotor rotating continuously. Application of position sensor, reduce noise, improve the service life of motor operation and performance of the motor, at the same time to reduce the energy dissipation effect.

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

How tension sensor wiring

How tension sensor wiring ?First determine the monitor 's power Engine Water Temperature Sensor interface positive power of negative , positive feedback , negative feedback , positive signal, negative , if it is 6-wire transmission control , measure Car Temperature Sensorresistance smallest two lines are the power positive feedback positive ; the power of negative , negative feedback , after receiving the sensor load monitor , measure another two line voltage ( mV ) signal is connected to monitor the positive and negative connection monitor signal negative ; if the value is four lines , you need to monitor power is and feedback is shorted , the power losses and negative feedback shorted with a multimeter measuring Shaft Position Sensor four lines, of which the largest two resistor values ​​is the power , the other two is the signal . Depending on the sensor origin, can lead color judgment, within the country manufacturers usually red for the power supply positive , black is negative power supply , green for the signal is positive, white is the signal negative ; Europe produces sensors generally green as the power supply positive , black for the power negative , white for the signal is positive, red is the signal negative .

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 to install, 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 proximity sensors. 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 Camshaft Positioning Sensor similar . If you use a capacitive proximity sensor , 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 Engine Temperature Sensor can detect a wide range of materials , and detection distance is relatively long . However, in the detection of objectswith irregular surfaces may cause problems . Finally , and more for the Motor Temperature Sensor selection criteria , or to rely on the characteristics of the measured object , and to take into account the 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 .

Embedded temperature sensor to continuously improve the quality of military equipment

With the continuous improvement of the quality of military equipment , micro- computers, electronic circuit system more and more used equipment and technology fields. Therefore weaponry on the ambient temperature requirements are increasingly demanding , especially in combat conditions, the ambient temperature directly affects the combat capability of weapons and even weapons for their own safety , as the sensor technology in military equipment on the application, this problem will be resolved using the temperature sensor . Embedded temperature sensor is a set of embedded technologies and intelligent sensor technology withintegrated temperature sensor , not only can be done by conventional sensors for measuring the temperature of the measurement , and can use computer technology to collect raw data for processing , with a small, processing speed, high intelligence and high degree of integration flower is the trend of modern sensor . Camshaft Positioning Sensor are generally composed of three parts : the unit under test , sensitive unit and a data acquisition unit. In fact sensitive unit and a data acquisition and processing unit is an integral part of the smart sensor , a temperature sensor is embedded in Motor Position Sensor based on the increased functionality. With computer technology, sensor technology , measurement and control technology as well as the continuous development of embedded technology , embedded Coolant Temperature Sensor in military equipment will be more widely on the application , which will bring the overall strength of our army a qualitative leap , so that army in modern warfare handy , to defend territory.

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 .

A brief description of the flange torque sensor

Torque sensor in various industries have a wide range of applications, widely used in motors , generators, gear, engine torque, speed and power testing. We all know that the torque sensor can generally be divided into static and dynamic torque sensor torque sensor , which is from the torque sensor measurement to points, from the torque sensor structure can be divided into flange torque sensors and illegal orchid torque sensors , torque flange which sensors can be divided into single and double flange flange torque sensor torque sensor . Single flange torque sensor suggests that it is the end of the torque sensor with flange -type structure , so easy to install and fixed sensors , single flange design is more convenient for on-site installation, ideal for static , non- continuous rotation torque force value measurements. Learn the single flange torque sensor on a good understanding of double flange torque Camshaft Position Sensor , torque sensors dual flange torque sensor is based on a single flange adds a flange structure , ie the torque sensor flange structure at both ends . Double flange torque sensors and single flange Auto Temperature Sensor as generally only suitable for static , non- continuous rotation torque force value measurements. Understanding of the structure ofAutomotive Temperature Sensors can be a good choice for our torque sensor , such as measuring the dynamic torque sensor flange structure we are not going to choose a torque sensor , select Static torque sensor go to consider when selecting a single flange or torque sensor double flange torque sensor , so that we can narrow our choices , better and faster we choose the suitable torque sensor .

Sensors monitor the gas burner in the family of Application

Among the families of sensors are used with a temperature sensor , gas sensor , optical sensor , an ultrasonic sensor and an infrared sensor , etc. . Wherein the temperature sensor is the most common applications in the appliance , it is not only to bring to life a great convenience , but also to avoid fire , damage and other unexpected events. Recently published in the EU energy saving regulations , found that the use of new sensors control the burner , as many manufacturers of heating equipment upgrade of choice. Here's Crankshaft Positioning Sensorin the home under surveillance gas burning application . First, the gas and air mixture prior to combustion detection temperature , flow rate and composition of the combustible gas , so that the appliance can be calculated and the required heat supply air . Second, to detect possible reaction zone. Ions and some no-load number of atoms in the reaction can occur given product number . For example , if you know the volume fraction of oxygen , it is possible to infer the need to adjust the supply of gas or air . Third, the combustion state by detecting the carbon dioxide gas , carbon monoxide and nitrogen gas quantity and then OK. Being selected probe changes and changes in combustion characteristics of the relationship , thereby establishing a reliable control system. With the smart home slowly into family life , Car Temperature Sensor will need to be applied more and more , which is now a major sensor manufacturers in emerging markets . Vigorously develop the domestic sensors, to further improve the human home life, improve quality of life and taste , which is sensor manufacturers contribution to society .

Fire gas sensor is booming

Sensor technology in the fire , the fire gas sensor technology started late, but rapid development , especially in the field of early fire alarm fires become more and more attention of researchers and has developed various types of fire, gas sensors and smart , composite gas Shaft Position Sensor. Currently, the fire continues to move gas sensor miniaturization , intelligent and multi-parameter , multi- criteria composite probing direction. With the new sensor technology and application of new materials and the development of microelectronics technology , fire, gas sensors becoming smaller , miniaturization . Resistance using nanoparticles composed of gas with the surrounding environment changes and changes in the characteristics of nanomaterials can be made ​​Crankshaft Position Sensor, toxic gases, flammable gas detection and quantitative measurement . Because nanomaterials crystal surface catalytic activity, as well as having a porous structure and other characteristics , the use of nano- crystalline film produced gas sensor has more choice and anti-interference, improving the accuracy of the fire alarm to reduce false positives. Meanwhile, the small size of nanomaterials , surface area is small , greatly reducing temperature , reducing power consumption, so that the fire gradually sophisticated gas sensor miniaturization Yin Nami , film and other new materials preparation technology successful application of integrated fire and gas sensors intelligence provides a good prerequisite. Automotive Temperature Sensorswill make full use of micromechanical and microelectronic technology, computer technology , signal processing technology, circuits and systems , sensor technology, bionics , neural networks, fuzzy theory and other subjects on the basis of integrated technology to develop. Able to simultaneously monitor multiple gas developed automatic intelligent digital Sensor Camshaft , will be the next major development in this field . Fire is an extremely complex physical and chemical processes in different environments and different resultant fires burning material , such as gas composition , smoke particle size , temperature distribution and spectral composition are different , only one fire detection parameters vagaries the various types of fire is bound to have great difficulty , it may cause a false positive signal non-fire dust , water, gas , smoke, etc. do not have the real fire parameters . Therefore, multi-parameter , multi- composite fire detection criterion can not only overcome the single fire caused by false positives parameter , you can also identify the non-fire signaling leads to false positives , the future is still hot fire gas sensors . In addition, multi-parameter , multi- criterion composite gas fire detection sensor also allows to reduce the time to achieve early warning .

Thin-film temperature sensor case studies

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 Camshaft Position 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 temperature sensor structure , 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 Camshaft Positioning 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 Cooling 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 temperature sensor can 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.

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 .

Regardless of the vibration sensor is in the application of the test or have a key role

Regardless of the vibration sensor is in the application of the test or have a key role is an electromechanical conversion unit , we sometimes also called the vibration sensor transducer, the vibration pickup . The vibration sensor is not directly the original volume to be measured into a mechanical energy , but the original mechanical quantity to be measured as a vibration Automobile Temperature Sensor input, and receiving section to be received by the machine , form another for converting a mechanical quantity , and then finally by the electromechanical conversion section converts electricity . Therefore, performance of a sensor receiving portion by the mechanical and electrical converting portion determined performance . 1 , the relative mechanical principle due to mechanical movement is receiving physical movement simplest form , so people first thought is to use mechanical methods to measure vibration, thereby creating a mechanical vibrometer . The mechanical Motor Sensors receiver is built on the basis of this principle on . Relative type vibrometer working principle is the measurement receiver , the instrument does not move in a fixed bracket, make contact with the measured object vibrating rod in the same direction , and by the elastic force of the spring in contact with the surface of the measured object , when the object vibrates, the antenna rod to follow it with the movement , and to promote the movement of the tape recording pen depicted on the vibration displacement of the object with time variation curve can be calculated according to the recording of the displacement curve of the size and frequency parameters . 2 , the principle of inertia mechanical inertia receiving mechanical vibration vibrometer when vibrometer is directly fixed to the measured vibration measuring point on the object , when the measured vibration Engine Water Temperature Sensor housing with the movement of objects , by the elastic support of inertia mass relative motion to the housing , is mounted on the block and to record the recording pen can be mass element and the shell relative vibration displacement amplitude , and the use of inertial mass and the housing relative to the vibration displacement relationship can calculated absolute vibration measured object displacement waveforms . 3, the vibration sensor is an electromechanical conversion general principle , the vibration sensor to receive the mechanical principle , only the relative type, inertia type two, but in the electromechanical conversion , due to the different nature of the transformation methods and its wide range of application is extremely extensive. In modern vibration measurement sensors used , is not the traditional concept of separate mechanical measuring device , it is only the entire measurement system in a part of , and with the subsequent electronics are closely related. Since Camshaft Position Sensor different internal electromechanical transformation principle , the output power is also different . Some of the changes in the amount converted into mechanical force , the charge changes , some changes in the mechanical vibration is converted into resistors, inductors and other electrical parameters changes. Generally , the charge and can not be directly subsequent display, recording , analysis instruments accepted . Therefore, electromechanical transformation principle for different sensors must be accompanied by specially equipped measuring circuit . Measuring circuit is the role of Auto Temperature Sensor output power becomes final follow-up show , analytical instruments generally acceptable voltage signal . Therefore, the vibration sensor according to their function may have the following classification : according to the principle of mechanical Receive : Relative type, inertial ; according to the principle of electromechanical conversion : electric , piezoelectric , eddy current , inductive , capacitive, resistive, photoelectric ; measured by the amount of machinery : displacement sensor, speed sensor

Photoelectric sensor is used to detect the distance of the apparatus from the light source is a

Photoelectric sensor is used to detect the distance of the device , a by a light source, an optical path and the three kinds of photovoltaic element part , the following is a detailed description of the photoelectric sensor . A self-contained photoelectric sensors include optical and electronic products , you only need a power supply. The Cooling Temp Sensorsperforms its own modulation, demodulation, amplification, and output switch . Some independent sensors provide such options as built-in control timer or counter. As technology advances, independent photoelectric Crankshaft Positioning Sensor getting smaller. Remote photoelectric sensors for remote sensing or in hard to reach places, contains only one Coolant Temperature Sensor optical components. Power input circuit , amplified, and output switch is in a different location , usually in a control panel . This allows the sensor is very small , and controls are accessible , because they could be bigger. When space is limited or even hostile environment is too remote sensors, optical fiber may be used. Fiber is a passive mechanical sensing components. They can use two remote or separate sensors . They no electrical wiring and no moving parts, can be safely tube light harsh environments.

Note that the actual operation point of the pressure sensor

Measured not only in the production of pressure sensors play an important role , also in real life pressure sensor applications are endless . Pressure sensors are widely automated measurement applications in the automotive market, the new changes almost every day , in fact, everywhere around us , on the road on a motorcycle has a pressure sensor shadow. In fact, the quality of the pressure sensor has been in production concern, in this regard only determines the production and testing department executive power, in fact, the real life of the sensor quality and the right to decide on the user's hand. Here it should be noted that the use of pressure Car Temperature Sensor to make a summary of some of the issues . Pressure sensors work environment is generally more complicated, first of all we should prevent the waste deposited in the conduit and sensors with corrosive or hot media contacts . Measuring gas pressure in the pressure sensor , the pressure port should be opened in the flow line to the top , and the sensor is installed in the flow line to be fixed to the upper part so as to accumulate liquid flow easily into the pipe. Pressure sensors measure the fluid pressure , the pressure port should be opened in the side of the pipeline process , in order to avoid deposition of slag accumulation , this is to prevent blockage causes pressure sensor measurement errors . Impulse control pressure sensor should be installed in temperature fluctuations small place , so as to make the sensor work more stable. Similarly in the measurement of fluid pressure sensor , the sensor should be installed to avoid the impact of the liquid in order to avoid overvoltage damage Cooling Temperature Sensor . Winter freezing occurs when the sensor is installed outdoors freezing measures must be taken to avoid the impulse in the mouth due to icing fluid volume expansion , resulting in loss of the sensor . Pressure sensor wiring , should the cable through the waterproof connector or entangling pipe and tighten the nut tight seal to prevent leakage of rainwater into the transmitter through the cable housing to avoid line fault. Pressure sensor in the measurement of steam or other high temperature medium , the need to take additional buffer tube condenser, the operating temperature of the sensor should not exceed the limit , etc. These problems are in practice the need for technical staff are to pay special attention .

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.

On the role of the acceleration sensor compensation

The most common application acceleration sensor is used to detect the acceleration and direction of the phone , while the phone when it is only by standing gravity , so many people put the acceleration sensor function is also called gravity sensing capabilities. Acceleration sensor 's strengths lie in the force measuring device . Yeah, but the device used to measure the position relative to the ground placed , then the accuracy is not high. Acceleration sensors can be used with a fixed reference coordinate system gravity , there is a linear or rotary motion tilting movement is limited , but a range of applications . Handle both linear and rotational movement , you need to put the acceleration sensor and a gyro sensor combination. If you want the device will not get lost in the movement direction, coupled with Crankshaft Positioning Sensor , a gyro , a magnetic sensor and an acceleration sensor is often used in conjunction with each other there is a mutual compensation between . Application of the magnetic sensor by measuring the magnetic flux electronic compass to determine the size direction . When the magnetic Coolant Temperature Sensor is tilted, the geomagnetic flux through the magnetic sensor will change , so that the direction of the point of error . Therefore, if tilt correction without electronic compass , requiring users to horizontally. The acceleration sensor can measure the angle of this principle, the tilt can be compensated electronic compass . In addition , GPS systems are three by 120 degrees by receiving satellite signals distribution finalize the object orientation . In some special occasions and landforms, such as tunnel, skyscrapers, jungles , GPS signals may be weak or even completely lost , which is called the dead . And through the installation of an acceleration sensor and a common inertial Cooling Temperature Sensor , the system can measure the dead zone . Time integral of the acceleration sensor , it becomes a change in speed per unit time , thereby measure the movement of the object in the dead zone . .

Temperature and humidity sensor applications in environmental monitoring

Metro 's large volume, which is a large passenger flow , the required variation in fresh air . Therefore subway air conditioning load changes, to achieve energy must resort to automatic control means. Automatic control system as an integral part of , environmental sensors in the subway more plays an important role . The environmental control system in the subway , the main use of the indoor temperature sensor and humidity sensor , duct temperature and humidity sensors . We can order at the station concourse and platform areas and other public areas as well as important equipment room set indoor temperature and humidity sensors to monitor real-time temperature and humidity of the station . These parameters can help operational staff working conditions of various systems of the station to make reasonable adjustments to keep always in the public areas of the station more comfortable environment to ensure that the device has been in the right room temperature under . Indoor temperature and humidity Car Sensors are generally mounted on the station concourse , platform and equipment room on the wall or on top . In the meantime, we can at the station 's new air chamber and the return air duct temperature and humidity chamber mounted Engine Water Temperature Sensor to monitor the outdoor air and the temperature and humidity inside the station . Environmental control system according to the data collected by sensors to determine the environmental quality of the station , and according to a variety of conditions pre-designed for automatic switch , automatic control system in order to achieve automatic control of the environment of the station , so that the station is always in a more environment comfortable environment, and ultimately achieve the purpose of energy saving and emission reduction . Pipeline temperature and humidity Coolant Temperature Sensor is usually installed in the new and the return air plenum chamber walls. Thus, the temperature and humidity sensor usefulness in life more and more, it is not only in the station , greenhouse , file management and food industry has applied , is now in the subway environmental control system has also been adopted .