1, strain-type pressure sensor The strain-type pressure sensor mainly measures the pressure by measuring the strain of the elastic element. According to different materials, strain elements are divided into metal and semiconductor. When the conductor and semiconductor materials are mechanically deformed, their resistance values will change.
2. Piezoresistive pressure sensor Piezoresistive pressure sensor is a sensor made of monocrystalline silicon material and integrated circuit. When the single crystal silicon material is subjected to force, the resistivity will change. At this time, through the measuring circuit, an electrical signal proportional to the change of force will be output. Different from the adhesive strain gauge, the measured pressure is mainly felt through the silicon diaphragm.
3. Capacitive pressure sensor Capacitive pressure sensor mainly uses capacitance to convert the measured pressure into a pressure sensor with variable capacitance. The electrode of the capacitor is a circular metal film or a metal coating. When the film is deformed under pressure, the capacitance changes and an electrical signal is formed.
4. Piezoelectric pressure sensor Piezoelectric pressure sensor uses piezoelectric effect, electrical components and other machinery to convert pressure into electrical energy, and then carries out related measurement work.
Nanjing wotian technology
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