A thick film pressure sensor chip, a signal processing circuit, a housing, a fixed circuit board device, and two leads make up the electronic oil pressure sensor (signal line and alarm line). A power supply circuit, sensor compensation circuit, zero adjustment circuit, voltage amplifier circuit, current amplifier circuit, filter circuit, and alarm circuit make up the signal processing circuit.
The Structure of the Oil Pressure Sensor
The sensor's structure diagram is shown in Figure 1, and its main block diagram is shown in Figure 2. The thick-film pressure sensor, which first debuted in the 1980s, is a strain-type pressure sensor. The piezoresistive effect of thick-film resistors printed and sintered on ceramic elastomers is used to create it. On the ceramic elastic diaphragm, four thick film resistors are directly printed and sintered, then coupled to form a Wheatstone bridge via the conduction band. The elastic diaphragm flexes and deforms as the measured liquid level pressure acts on the ceramic elastomer.
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