The drift involved in the sensor refers to the unwanted change in the output that is independent of the input amount due to external interference. The drift of the sensor includes zero drift and sensitivity drift.
Sensor zero drift or sensitivity drift can be further divided into time drift and temperature drift.
Sensor time drift refers to the time drift under specified conditions. Zero point or slow change in sensitivity over time.
Sensor temperature drift is the drift of the zero point or sensitivity caused by changes in ambient temperature.
There are generally 2 ways to solve sensor temperature drift, hardware and software. The hardware methods include the appropriate constant resistance method for series and parallel connection on the bridge arm, the thermistor compensation method for the bridge arm, the compensation method for the series and parallel connection of the bridge arm, the double bridge compensation technology, the transistor compensation technology, etc. The software method is to eliminate the offset through the software program, this method corresponds to the digital output of the sensor is very practical, the customer can be written through the software to achieve, or the sensor with the digital display table can also be achieved by adjusting the digital display. All are very convenient.
Today, with the accelerated development of the sensor industry, the requirements for measurement accuracy are getting higher and higher, so it is particularly important to reduce or eliminate the sensor error caused by temperature.
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