The principle and application of pressure sensor, how to test the pressure sensor?

Pressure sensors are actually divided into many types, including piezoresistive pressure sensors, sapphire pressure sensors, and electrical pressure sensors. There are different styles of sensors, and their working principles are also slightly different. Then the working principles and applications of different sensors are as follows:

1. The sapphire pressure sensor adopts the working principle of strain resistance.Mainly using semiconductors made of silicon sapphire sensitiveYuanIt is not sensitive to temperature changes, and it also has good working performance under high temperature conditions.

2. The working principle of the piezoresistive pressure sensor is that the working principle of the metal resistor sheet is mainly adsorbed on the basic material, and the strain resistance is randomly deformed, resulting in a phenomenon of resistance value change, also known as the resistance strain effect.

3. Voltage is a pressure sensor, and its working principle uses the piezoelectric effect of the voltage sensor, and the voltage sensor cannot be used for static measurement, but can only be used for dynamic measurement, mainly because the sensor must have a charge of external force to monitor pressure.

4. Most of these pressure sensors will be used in hydraulic systems or injection molds.

So all in all, the main function of the pressure sensor is to be able to sense the relevant pressure signal, and can convert the pressure signal into an output electrical signal or transmit it to other devices according to certain instructions. Under certain circumstances, the pressure sensor will also be damaged, and the method of judging whether it is good or bad is also very simple. It can be distinguished by appearance, or tested according to electrical characteristics, and whether it can be monitored under different pressures. Output normal voltage.