Compression spring pogopin pressure detection method

　　1. Spring tube pressure gauge

　　We work according to the elastic properties of elastic elements. It is composed of a spring tube, a mechanical transmission amplifying mechanism, a pointer and a dial. The measured pressure is converted into the displacement of its free end through the spring tube, and converted into the displacement of the pointer by the mechanical transmission mechanism. After comparing with the scale, you can know the size of the measured pressure. The spring tube pressure gauge is simple in structure, reliable in measurement and low in price. It is a local indicating pressure gauge with a wide range of applications and a long application history.

　　2. Strain gauge pressure sensor

　　The measurement of the measured pressure is done according to the strain effect. It is composed of pressure sensitive elements, strain gauges, electric bridges and display instruments. The pressure sensitive elements are subjected to pressure to generate corresponding strain E. From the strain effect, it can be known that the change of resistance value is converted into the change of voltage by the measuring circuit. After the amount is measured, the size of the measured pressure is displayed by the display instrument.

　　3. Hall chip pressure sensor

　　It is composed of a spring tube, a Hall effect device and a display instrument. The measured pressure is converted into the displacement of the Hall plate in the nonlinear magnetic field through the spring tube, and the corresponding Hall potential is output through the Hall effect device. measure the pressure.

　　4. Capacitive pressure transmitter

　　It is composed of a capacitive pressure sensitive element and a measurement conversion circuit. The measured pressure is converted into the displacement of the capacitive moving piece through the pressure conversion element, and then converted into the change in capacitance through the capacitor. The change in capacitance is detected by the measurement circuit. The display instrument shows the size of the measured pressure.

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