The small partners all know that the pressure sensor is a kind of pressure measuring instrument, but this small pressure measuring instrument also contains a lot of knowledge. Pressure sensors have many remarkable features such as small size, light weight, high accuracy, and good temperature characteristics. Currently, they are widely used in industrial automation, water conservancy and hydropower, intelligent buildings, railway transportation, aerospace and many other fields. The following Xiao Bian will mainly explain the pressure sensor from the pressure sensor principle and its application.
Second, the principle of pressure sensorThere are many types of pressure sensors, and different types of pressure sensors work in different ways.
Piezoresistive pressure sensors mainly use the strain effect of the resistors. Mechanical deformation occurs due to the presence of pressure. The mechanical deformation changes the resistance of the strained resistors adsorbed on the base material, so that the pressure can be reflected by changes in resistance. The change.
The ceramic pressure sensor mainly uses the piezoresistive effect. The pressure acting on the front surface of the ceramic diaphragm causes the diaphragm to deform slightly, which in turn forms a Wheatstone bridge with a thick film resistor printed on the back of the ceramic diaphragm. The piezoresistive effect causes the bridge to generate a voltage signal that is proportional to the pressure so that changes in pressure can be reflected by changes in the voltage.
Third, applicationThere are many kinds of pressure sensors and their working principles are not all the same, which makes them able to meet the requirements of various situations. At present, they have been widely used in hydraulic systems, safety control systems, injection molds, mine pressure monitoring and many other aspects. application.
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