Working Principle of Force Sensor
Force sensors are commonly used sensors that are widely used in various industrial automation fields. The main function of force transducer is used to measure the magnitude of the force applied to an object, and convert the measurement result into an electrical signal output for data acquisition and control.
The working principle of the load cell is based on the lever principle and resistance principle. Force sensors are usually composed of elastomers, strain gauges, bridges, signal conditioning circuits and so on.
When the object is subjected to force, the elastomer will produce deformation, and the strain gauge will also be deformed. The strain gauge is a resistive element that converts the deformation into an electrical signal. When the strain gauge deforms, its resistance changes accordingly. A bridge is a component used to detect the change in resistance of a strain gage, and it converts the change in resistance of a strain gage into a voltage signal output.
The signal conditioning circuit is a circuit used to amplify, filter and linearize the voltage signal in order to convert the signal into a usable electrical signal output. Ultimately, the electrical signal output from the force transducer can be transmitted and processed in the form of an analog or digital signal.
