YLE Camshaft Position Sensor With the development of sensors are widely used in many industries

With the development of sensors are widely used in many industries, in the agricultural machinery used in measurement of pressure sensor, usually in the pressure of the hydraulic system YLE Engine Temperature Sensors and hydraulic oil filled pressure, to ensure safe and efficient operation. Then in the agricultural machinery used in pressure sensor, the how to choose? Here are three pressure sensors for use in agricultural applications to measure the hydraulic and pneumatic parameter example: 1 fluid pressure measurement (such as liquid fertilizer spray), to ensure that the chemicals in the field was reasonable control. 2 measurement for hydraulic pressure lifting and moving agriculture plows and appliances. Including for plowing and sowing equipment. 3 monitoring and control of braking and equal security system pressure. Design Engineer in agricultural machinery selection and application of hydraulic and appropriate dynamic pressure sensor, should pay attention YLE Engine Coolant Level Sensor to four main parameters: working pressure range, overload and burst pressure, environmental protection, pressure port and connector types. In addition, the pressure sensor's flexibility and configurability is an important factor in design complexity and cost. Sensor is flexible and configurable to meet the specific requirements ofdifferent countries, and can be used for a plurality of hydraulic overloading in agricultural applications. The designer should choose those into a number of key parameters (including the work pressure, pressure port and connector type) to provide a large number of alternative products series pressure sensor.

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.

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 .

How to install vibration velocity sensors

Speed ​​sensor vibration velocity sensor , the vibration velocity is typically used to measure the vibration of the bearing , but there are a few cases in the shaft for measuring vibrations. How to install vibration velocity sensors do ? In the measurement of vibration velocity , if sensor is installed incorrectly or is not securely installed , the measurement results will cause distortion due to vibration or damage caused by the speed sensor . So we have to consider a good choice for vibration velocity sensor is installed. When the speed sensor is used to measure shaft vibration when installed in the field are usually taken with the hand , sticky water plasticine magnetic disk fixed , bolted in several ways . In the temporary vibration measurement , in most cases, hand sensors way , this method measured flexible , easy to use , especially when the number of the lack of vibrationEngine Coolant Temperature Sensor interchangeability bad, has a special advantage ; And this the disadvantage is that the test measurement error is relatively large, and the intensity of work is relatively large . Current speed sensor when measuring the vibration velocity , usually people will use the Engine Coolant Temp Sensor fixing screws directly on the bearing , not only can reliably measure the bearing at the top of the vibration in three directions , but also can be measured in two directions perpendicular to the plane of vibration this method is the best way to install the measure . Also has a different installation methods , due to the installation of the various conditions to determine that we have a good effect on manually installing a useful little plasticine paste the speed sensor is also more convenient , you need to note that plasticine vibration Motor sensor can not be pasted into the vertical plane , and can only be fixed on a horizontal surface , as affected by temperature adhesive force , high temperature and the lower the adhesive strength will be significantly reduced, so it is not suitable for fixing the high temperature high pressure turbine rotor and reel measuring wheel speed sensor bearing ; winter cold start , the bearing temperature is too low and it is not used . There is a similar permanent magnet sucker fixed speed sensor mounting , etc., when we observe the installation follow the rules is to measure the needs , the need to make sense of your environment changes , so that the vibration velocity sensor mounted only purpose is to more has the effect of reducing unnecessary errors

What are the application Humidity Sensor

Humidity sensor is able to feel the water vapor content in the gas and used to convert the output signal of the sensor. With the realization of modernization , it is difficult to find a field unrelated to the humidity , the humidity sensor for measuring or controlling the relative humidity of the gas or absolute humidity, dew point and so on. Can indirectly control the temperature . Below its typical application for an introduction. ( A ) in the humidity measurement system application ( a ) below 70 ℃ ( normally at -40 ℃ above ) , if relatively clean environment , the use of polymer sensors, polluting the use of Camshaft Position Sensor ( heating washing of regeneration type ) . Heating the cleaning process as it exists , can not be continuously measured , and the large energy consumption (1 ~ 10W). However, long life, use the optional heated sensor clean cycle is longer , such as chlorine oxy apatite Auto Temperature Sensor , 2 ~ 3 months wash , in addition, internal heat than the outer heat and low energy consumption . ( 2 ) In the range of 70 ~ 100 ℃ measured humidity , washing with a heating ceramic sensor , to improve the accuracy of linear and temperature compensation. In order to achieve more accuracy will have with the microcomputer. In hot and humid heat required frequent cleaning, such as more than 80% RH , the need to 30S cleansing once daily, preferably equipped with automatic cleaning device heating . ( 3 ) in the range of 100 ~ 150 ℃ humidity measured in the international community , mostly made ​​of ceramicCooling Temperature Sensor temperature and humidity instrument . ( Two ) in the industrial automatic control application process in order to improve product quality and energy , usually in the product drying system , humidity control reactors , boilers, water vapor leak detection, integrated circuits or the head of the air-conditioning plant mostly using ceramic humidity sensor control ; variety of air conditioning systems, medical systems and humidity control can be polymeric or ceramic humidity sensor . ( Three ) in a steam leak detection systems used in thermal power stations , nuclear power plants, steam locomotives , boilers and other high temperature and pressure equipment , in order to prevent leakage, prevent accidents , humidity sensor can be used for leak detection . ( Four ) in the other systems used in home appliances dew condensation detection sensor can be used as tape recorders , car windows, condensation , frost detection. Humidity sensor applications driving the need for microelectronic circuit package failure mechanism analysis , due to IC failure and humidity have a great relationship .

The method of pressure sensors to achieve impact

Pressure sensors used in many bad environment , some of the bad environment may be more severe , such as pressure sensors need to measure the impact pressure , the measured impact pressure generally requires relatively high pressure sensor performance , we usually have several ways to measure the impact type pressure . The first method is to change the pressure transmitter chip , not an ordinary ceramic cores or diffused silicon core , but with strain gages , strain gauges is a strain on the DUT will be converted into an electrical signal of change sensitive device. It is a piezoresistive Camshaft Position Sensor of the main components . Resistance strain gauge is the most widely used metal resistance strain gauges and semiconductor strain gauges two kinds . Metal resistance strain gauges have filamentous strain gauge and the metal foil strain gages two kinds . The strain gauge is usually via a special adhesive binder tight mechanical strain is generated on the substrate , the force occurs when the substrate stress , the resistance strain gauge is generated with deformation, the resistance strain gauge is changed , so that the the voltage across the resistor changes . The strain gauge force generated when the change in resistance is usually small , it typically are composed of strain gage bridge , and through subsequent instrumentation amplifier is amplified , and then transmitted to the processing circuit . Strain gauge Auto Temperature Sensoris generally shock and impact resistance is better, but this sensor accuracy with their manufacturers . The second method is to use an ordinary ceramic Coolant Temperature Sensor or pressure sensor to measure diffusion silicon , but not be measured directly , but with the addition of a buffer tube , which also can measure the impact pressure . This method is economical , easy to install , so the application is very extensive. Regardless of the method is to measure the impact pressure sensor core body protection is not strong pressure washed out . Which method based on the specific use now have a bad environment and customer choice .

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 .

Unique advantages photoelectric sensor

Photoelectric sensor applications more monitoring, response systems. Large aerospace military field , small -car electronic eye , etc., can be applied photoelectric sensors. In many industrial production line there are some application cases. For example, electronic eyes monitoring , digital rangefinder and counting ! Here to introduce you to the unique advantages of photoelectric sensors under what . 1 ) If long distance detection is retained on the radio more than 10m detection distance , etc., will be able to achieve other detection methods ( magnetic , ultrasonic , etc. ) can not be away from the detector . 2 ) restrictions on the detection of small objects caused due to the detected object shading and reflection for the detection principle , it is not like the proximity sensor will detect metal objects limited , it may be on the glass . Plastics timber of liquid , almost all objects detected . 3 ) Response time is short for high-speed light itself , and Crankshaft Positioning Sensor circuit constituted by the electronic components , it does not include mechanical working time , the response time is very short . 4 ) High resolution through advanced design techniques make the light beam is concentrated in a small spot , or by constructing a special light-receiving optical system to achieve high resolution . Small objects can also be detected and the position detection precision . 5 ) non-contact detection can be achieved without mechanical contact with can detect objects to achieve detection , it will not detect the object and sensor damage. Therefore, Car Temperature Sensor can be long-term use . 6 ) can be achieved by detecting the object forming the color determination of the light reflectivity and absorption of the light according to wavelength of light to be cast and the detected object color combinations vary . By utilizing this property , can detect the color of objects detected. 7 ) to facilitate adjustment of the projection type, visible light , flood light beams are visible to the eye , to facilitate adjustment of the position of the detected object .

Displacement sensor parameters

Displacement sensor parameters - displacement sensor is a relatively common sensors, displacement sensors is it ? Displacement sensor parameters What ? Displacement sensor , also known as linear sensor , it is divided into inductive displacement sensors , capacitive displacement sensor , optical displacement sensors , displacement sensors ultrasonic displacement sensors , hall-type displacement sensor . Inductive Coolant Temperature Sensor is a linear device belonging to metal induction , after power sensing face of the switch will generate an alternating magnetic field , when a metal object close to this sensor surface, the metal is generated eddy current draws oscillator the energy, so that the oscillator output amplitude linear attenuation , and then the change in the amount of attenuation to accomplish the purpose of non-contact sensing object . Main parameters Nominal resistance: potentiometer resistance indicated above . Repeatability: This parameter is as small as possible . Resolution: minimum displacement sensor displacement values ​​can feedback This parameter smaller the better. Conductive plastic Coolant Temperature Sensor resolution is infinitesimal . Permissible error: nominal resistance and actual resistance the difference with the percentage of the ratio of nominal resistance , said resistance deviation , which represents the precision potentiometer . General tolerances within ± 20% as long as it meets the requirements, because the general displacement sensor based on the partial pressure of ways to use the specific resistance of the size of the sensor data acquisition is not affected. Linearity: Linearity error This parameter is smaller and more good life: conductive plastic displacement sensor in 200 million times.

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 .

A pressure sensor for detecting the pressure

Pressure sensors are most commonly used in industrial practice of a sensor , which are widely used in various industrial automation environment, involving water utilities , rail transportation, intelligent buildings, production automation , aerospace , military, petrochemical, oil, electric power, shipbuilding , machine tools , pipes and many other industries. The pressure Motor sensor is a Crankshaft Positioning Sensor is converted to an electrical signal on the machine, the machine adapted clamping force on the workpiece is monitored when the clamping force is lower than the set value when the work will lead to loose , the system sends an alarm , stop take the knife ; additional tools can detect changes in the cutting force . Moreover, it is in the lubrication system, hydraulic system , pneumatic system, for detecting the passage or the gas pressure in the oil or gas when the pressure is less than set when the set value , the shock will be activated and then sends signals to the control system to control it.

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.

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 .

In the course of the humidity sensor has several issues deserve attention

In the course of the humidity sensor has the :Select the measurement range and weight, temperature , the choice of the humidity sensor must first determine the range of measurement. In addition to weather , research departments, to engage in temperature and humidity monitoring in general do not need all wet process (0-100% RH) measurements. In today's information age , Shaft Position Sensor technology and computer technology , automatic control technology closely integrated with . The purpose is to control measurement , measurement range and control of the use of collectively . Of course, do not need to engage in monitoring and control system applications are concerned, directly select universal moisture meter on it. Select the same measurement accuracy and measurement range , measurement accuracy of the sensor with the most important indicators. Each increase - percentage points. It is for the sensor to a higher level , or even on the next level . To achieve different accuracy because its manufacturing costs vary widely , the price is also very different. For example imports an inexpensive Engine Coolant Temperature Sensor only a few dollars, and one for the entire wet process of calibration and humidity sensors to a few hundred dollars , a difference of nearly a hundred times . Therefore, the user must be tailored , not the blind pursuit of "high, fine, sharp ." Manufacturers often give its humidity sensor segmentation accuracy . In case of low humidity segment ( 0 a 80% RH) was ± 2% RH, and the humidity segment (80-100% RH) was ± 4% RH. And this accuracy is at a specified temperature (such as 25 ℃) value. If used at different temperatures andCar Temperature Sensor. Its indication should also consider the impact of temperature drift . Is known , the relative humidity is a function of temperature , temperature seriously affecting the relative humidity within the specified space . Each change of temperature 0.1 ℃. Will generate 0.5% RH humidity change (error ) . If it is difficult to do using the occasion thermostat , the proposed high measuring precision is inappropriate. Because humidity variations with temperature drift suddenly uncertain , then talk about measuring precision will be moot . So first of all to control humidity temperature control is good , this is the large number of applications are often temperature and humidity - sensor integration and not simply because of the humidity sensor . In most cases, if there is no precise temperature control means , or a non- sealed space is measured , ± 5% RH of accuracy is sufficient . For applications requiring precise control of temperature and humidity of the local space , or need to keep track of changes in humidity recording of the occasion, and then use ± 3% RH. Above precision humidity sensor . And this corresponds to the temperature sensor. Its measurement accuracy ± 0.3 ℃ above shall be sufficient , at least ± 0.5 ℃ for . The accuracy better than ± 2% RH sensor calibration requirements but even the standard humidity generator is also difficult to do , not to mention the sensor itself .

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

Capacitive Humidity Sensor

Capacitive humidity sensor directly sensing the relative humidity changes , the humidity changes into a change in capacitance , and then change in capacitance by the signal conditioning circuit is converted to a standard electrical signal supplied to the associated control or monitoring circuits. Capacitive humidity sensor features are: fast response, high linearity , low hysteresis and long-term stability and good , so applications are increasingly widespread . Capacitive relative humidity sensor usually consists of thermosetting polymers , three capacitor structure , platinum electrodes , as well as integrated signal conditioning circuit ( except for high-temperature applications ) and other components. As shown below, wherein the thermosetting polymer is the outermost layer of the sensor package is mainly for protection against dirt , dust, oil and other Mian override or enter into Camshaft Position Sensor , corrosion platinum electrode , affect the sensor response speed . The outer layer of the platinum electrode is filled with holes, make sure the air with water vapor quickly and smoothly into the internal sensor , speed sensor response speed and reduce the measured hysteresis. In practice , based on the affinity of vapor capacitive, resistive or conductive thin film as a humidity sensor is sensitive to humidity , but also on the temperature-sensitive , so in order to achieve accurate measurement , or wide temperature range , temperature compensation is not necessary small. To achieve temperature compensation, temperature measurements must be placed as close to the Shaft Position Sensor measurement environment, particularly humidity and temperature is calculated using the dew point , which is particularly important. Industrial humidity and dew point measuring apparatus is usually integrated in the sensor substrate opposite a 1000 ohm platinum RTD temperature sensor for temperature compensation. When the sensor sensing area surface temperature is below ambient dew point temperature , then the sensor sensing area surface condensation is easy , even if the surface temperature or sensor sensing area within the local temperature only briefly below ambient dew point temperature, the sensor has an internal or surface condensation may form , especially when the working environment humidity above 95 %, the temperature of the subtle fluctuations are likely to cause condensation . In order to avoid humidity and dew condensation on Crankshaft Positioning Sensor influence , there is usually some measures such as maintaining good air circulation to reduce temperature fluctuations ; add to the humidity sensor sintered stainless steel filter , a waterproof coating to further suppress the condensation of .

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.

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.