Linear displacement sensor
The function of the linear displacement sensor is to convert the linear mechanical displacement into an electrical signal.
In order to achieve this effect, the variable resistance rail is usually fixed at the fixed part of the sensor, and the different resistance values are measured by the displacement of the sliding piece on the sliding rail. The sensor rail is connected to a steady-state DC voltage that allows a small current to flow through the microamperes, and the voltage between the slider and the start is proportional to the length of the slider movement. Using the sensor as a voltage divider minimizes the need for the accuracy of the total rail resistance because changes in resistance caused by temperature changes do not affect the measurement.