Pressure sensor is commonly used in * belongs to pressure sensor a, in industry, electronics, chemical industry, medical, military, oil, and other fields has a certain application.
The types of pressure sensor is very much, can be divided into piezoresistive pressure sensor, ceramic pressure sensor, diffusion silicon pressure sensor, small make up today is to introduce specific common pressure sensor for everybody work, hope you can help to you.
1, piezo-resistive type force sensor: resistance strain gauge is pressure resistance strain sensor is one of the main part.
Metal operation principle of resistance strain gauge is adsorbed on the substrate material resistance changes of strain resistance produced according to the mechanical deformation phenomenon, commonly known as resistance strain effect.
2, ceramic pressure sensor: ceramic pressure sensor based on piezoresistive effect, pressure effect directly in front of the ceramic membrane surface, make the diaphragm produces tiny deformation, thick film resistors printed on the back of the ceramic diaphragm, connected into a wheatstone bridge, as a result of the varistor piezoresistive effect, make the bridge produces a is proportional to the pressure of the highly linear, and the excitation voltage is proportional to the voltage signal and standard signal according to the different calibration of pressure range of 2.
3 mv/V, etc. , can be compatible and strain sensor.
3, diffusion silicon pressure sensor: diffusion silicon pressure sensor operation principle is based on piezoresistive effect, using the piezoresistive effect principle, the medium to be measured directly impact on the pressure of sensor diaphragm (
Stainless steel or ceramic)
, make diaphragm micro displacement is proportional to the medium pressure, the sensor resistance change, use of electronic circuit to detect the change, and the transformation output of a standard measurement signal corresponding to the pressure.
4, sapphire pressure sensor: using the strain resistance type operation principle, the silicon -
Sapphire as semiconductor sensitive element, with unparalleled measurement properties.
Therefore, the use of silicon -
Sapphire manufacturing semiconductor sensitive elements, is not sensitive to temperature changes, even under the condition of high temperature, also has the very good operation characteristics;
Radiation characteristics of sapphire is extremely strong;
In addition, silicon -
Sapphire semiconductor sensitive element, no p -
5, piezoelectric pressure sensor, piezoelectric effect is the main operating principle of piezoelectric sensors, piezoelectric sensors cannot be used for static measurements, because the charge, after external force only has infinite input impedance in the loop when saved.
The actual situation is not so, so this determines the piezoelectric sensors can only measure the dynamic stress.
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