How many parts does the pressure sensor consist of?
Some pressure sensitive components give rise to some charge when subjected to pressure. Using bridge circuit to detect the current on the bridge arm, you can calculate the pressure
Signal processing sectionConvert physical quantities into electrical signals
The sensitive element, conversion element, processing parts, pressure sensor measurement to achieve the general application of strain gauge, manufacturing is based on the principle of strain gauge bridge circuit, when the resistance at the bridge to meet such conditions: R1R3=R2R4 bridge balance, the output voltage is zero, when the resistance by changing time that bridge is not balanced, there is a certain voltage output. It can be divided into single arm bridge, double arm bridge and full arm bridge, whose output voltage and resistance vary approximately linearly. The strain gauge is very thin sheets, on the surface with two a resistance wire, and there are also two of the same resistance surface is formed on the connecting bridge circuit, when the strain gauge pressure is not to say, the voltage is zero, when there is pressure, above resistance becomes large, the resistance decreases, the bridge not Pingheng, and the resistance wire are the same, the change of resistance of the same amount of variation of voltage and resistance of the output into a linear relationship, this pressure can be measured by calculating the size of pressure.I only know so much, I don't know if it's good for you.
