Sensor has been widely familiar with everyone, everyone of the sensor output signal is an idea, and from the sensor output signal forms can be divided into three types of incremental code signal, absolute code signal and switch signal. Have their own advantages, these three signals. These three signals and what does that mean? We have to make a brief introduction below.
Incremental code signal is according to the characteristics of the measured value proportional to the change of the sensor output signal cycles, namely the size of the output values regarding to the number of cycles by signal change incremental decision. General grating displacement sensor, the magnetic grid displacement sensor, such as the laser displacement sensor displacement measurement by interference method and so on, the sensor output signals for the incremental code.
Absolute code signal is a kind of measured object and the status of the corresponding signal. Such as encoder, it's every Angle position corresponds to a set of code, the code is called absolute code. Absolute code signal has a strong anti-interference ability, no matter what happens in the process of measurement, after the interference, a state is always corresponding to a set of coding.
Switch signal: switch signal only two state of 0 s and 1 s, can be considered as absolute code is only a special case of the code. Such as travel switch, photoelectric switch, etc. The output of the sensor is switching signal.
This is a form of sensor signal classification. Know this is very helpful to us, although we usually always said sensor signal into analog signals and digital signals. But it is not really the sensor signal classification form, it's a simple we just used to distinguish the sensor signal.
