Pressure valves for automobile pressure sensors 8531299-0231A

1. A pressure sensor calibration device, characterized in that the pressure sensor calibration device comprises a base, an airbag, a cross beam, a pillar and a calibration circuit system; Wherein, the strut is used for supporting the beam, and the airbag is fixed on the beam, so that the airbag is placed between the beam and the base; The base is used for placing the pressure sensor to be calibrated, and one side surface of the pressure sensor is attached to the base, and the other side surface is attached to the outer surface of the airbag; The calibration circuit system collects the output signal of the pressure sensor through a signal line, and the calibration circuit system is connected with the airbag through an air duct to inflate and exhaust the airbag and collect the pressure signal in the airbag

2. The pressure sensor calibration device according to claim 1, wherein the calibration circuit system displays the collected signals.

3. A pressure sensor calibration device, characterized in that the pressure sensor calibration device comprises a base, an airbag, a cross beam, a pillar and an automatic calibration circuit system; Wherein, the strut is used for supporting the beam, and the airbag is fixed on the beam, so that the airbag is placed between the beam and the base; The base is used for placing the pressure sensor to be calibrated, and one side surface of the pressure sensor is attached to the base, and the other side surface is attached to or close to the outer surface of the airbag; The automatic calibration circuit system collects the output signal of the pressure sensor through a signal line, and the automatic calibration circuit system is connected with the airbag through an air duct to inflate and exhaust the airbag and collect the pressure signal in the airbag.

4. The pressure sensor calibration device according to claim 3, wherein the automatic calibration circuit system comprises a gas path control part and a circuit control part, wherein the gas path control part is used for controlling the inflation and exhaust of the airbag, and the circuit control part is used for processing the collected signals.

5. The pressure sensor calibration device according to claim 4, wherein the gas path control part comprises an air pump, a one-way valve and a two-way valve, and the circuit control part comprises an air pressure sensor, a single chip microcomputer, a multi-channel conditioning circuit and a multi-channel A/D conversion circuit; The single chip microcomputer accurately controls the inflation and deflation process of the airbag by controlling the air pump, the double vent valve and the single vent valve. The signals of the pressure sensors to be measured are processed by multi-channel conditioning circuit and multi-channel A/D conversion circuit and then output to the single chip microcomputer. The single chip microcomputer automatically calibrates all the sensors to be measured according to the received output values of the pressure sensors and the pressure sensors to be measured.

6. The pressure sensor calibration device according to claim 5, wherein the air pressure sensor is an air pressure sensor with temperature and humidity compensation characteristics.