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.

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 .

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.

Capacitive Accelerometer

Capacitance -type ( with changes in acceleration caused by the change in capacitance sensing mass ) acceleration sensor is the most common in today . Irreplaceable in certain areas , such as airbags , cell phones and other mobile devices . High yield and low cost makes such sensors . However, this low signal to noise ratio of the sensor is subject to a low , limited dynamic range . All capacitors type Coolant Temperature Sensor has an internal clock that (~ 500kHz) is an essential part of the detection circuit , the output signal due to leakage often be disturbed. The frequency of this noise is far higher than the measured signal frequency , generally will not affect the measurement result , but it is always and test signals superimposed . A built-in amplifier chip, which generally has a 3-wire ( or 4-wire differential output ) interface. DC power supply will be able to work as long as there is . Capacitance type acceleration Coolant Temperature Sensor working bandwidth is generally limited to a few hundred Hz, partly because of its internal structure with a large and heavy air damping . Capacitance type acceleration sensor suitable for measuring low-range acceleration , the upper limit is generally less than 100g . In addition to these limitations, modern capacitance type acceleration Crank Shaft Position Sensor , in particular a level meter of the device, with good linearity and high stability. Capacitive acceleration sensor is usually appropriate onboard test , low cost is a factor. For low-frequency exercise test , acceleration generally low , they are an ideal choice. Such as civil engineering vibration testing .

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.