The working principle of a sensor is to convert non electrical physical quantities (such as force, temperature, light, sound, etc.) into electrical signals or other processable data forms through sensitive components. Its core process includes signal perception, conversion, processing, and output. ??

Core working principle

Signal perception: Sensitive components (such as photoresistors and piezoresistive materials) directly receive external stimuli (such as light and pressure changes). For example, the sensitive element of a magnetic induction sensor responds to changes in magnetic field. ??

Signal conversion: Conversion components (such as strain bridges and electromagnetic coils) convert perceived physical quantities into electrical signals. For example, a piezoresistive sensor detects strain signals through a strain bridge and amplifies them into voltage signals. ??

Signal processing: Conversion circuits amplify, filter, or digitize electrical signals. For example, in a torque sensor, the amplified signal is converted into a frequency signal through a V/F converter. ??

Output interface: The processed signal is transmitted to the display device or control system through wired/wireless means. ??