The role of the crankshaft position sensor is to determine the position of the crankshaft, the crankshaft angle is. It is usually with the camshaft position sensor to work together - to determine the basic ignition timing
Engine Coolant Temperature Sensor
2013年10月24日星期四
The advantage of digital load cell
First, the transmission distance, communication speed, the effect is significant anti-cheating traditional analog load cell output signal is small , typically millivolts during transmission due to cable resistance effects , there is loss of signal , but also susceptible to ambient interference , it is not for long-distance transmission. Its signal cheating a lot, usually difficult to control. The digital load cell signal output is digital, not only a high level , the impact of interference is very small, and it is the use of field bus technology, communication speed is super fast , but also with a communication error correction function, due to the confidentiality of communications protocols , cheating is basically impossible , so get a high data reliability . Second, anti-interference ability , high reliability, good lightning performance analog sensor output from the instrument power supply , power quality affected by the instrument . Between them susceptible to electromagnetic interference and surges. Instability of the power supply of Shaft Position Sensor output is also great, likely to cause instability in the output , the high voltage transient will cause the sensor damage. Digital sensor with a new welding manufacturing technology, which is also filled with helium safety protection circuit , a very high degree of protection . In order to prevent lightning surge interference , which uses the output voltage of the instrument reprocessing meet the sensor supply voltage requirements , so that the output signal becomes stable , the sensor will not be damaged . Three , eliminating calibrated load cell to get the scene, there is no suitable counterweight system calibration is generally difficult , if not then its calibration , the error will be great. Engine Coolant Temp Sensor during the live connection has loss, so must be carried out on-site calibration . And now digital sensors can dispense the job , because it has been used in the production of standard dynamometer was calibrated , and its output is the corresponding standard values . Since it does not substantially project in the transmission loss, so the read value is the actual measurement value , so it can save the calibration of the link. Fourth, you can work uninterrupted digital sensor error function it has a fault , once fails, it will output the signal to the instrument , the instrument signal is received , you can abandon its value , to automatically start uninterrupted work, can still guarantee a certain accuracy , the user can always know which sensor needs to be replaced , will not cause the production stagnant . Coolant Temperature Sensor can not meet that requirement , once the fault will cause production downtime , affecting plant efficiency. Five , easy maintenance, low overall cost of using digital load cell with a standard cable plug, both to ensure the protection level, and the replacement of the sensor or the cable is very convenient, but because of its digital output , without the impact of cable length . The analog temperature compensation of the sensor it is together with the cable , the cable will be connected after damage caused by errors , so many sensors are connected together with cable , replacement when it need to re- stringing , very inconvenient to use . It now appears that , although the digital sensor more than analog sensor circuit board , but not in the course of calibration , commissioning time will be greatly reduced , higher reliability , but also has a self- diagnostic function, can not be shut down for some production units , it also ensures uninterrupted work , saving production costs, so in general, it uses the overall cost is lower than the analog sensors .
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