Pressure sensor based on ceramic resistor sensing technology

Abstract

The invention discloses a pressure sensor based on a ceramic resistance sensing technology, which comprises a sensor shell, an electrical connector, a sensitive element seat, a PCB (Printed Circuit Board) and a pressure sensitive element, a threaded pipe joint is integrally formed at the lower end of the sensor shell, and the sensitive element seat is arranged in an inner cavity of the sensor shell; a fluid pipeline inserted into an inner cavity of the threaded pipe joint is integrally arranged at the lower end of the sensitive element seat, a square concave cavity is formed in the upper end face of the sensitive element seat, the pressure sensitive element is installed in the square concave cavity, the lower end of the electrical connector is arranged in the sensor shell, and three PI N needles are vertically inserted into the inner end face of the electrical connector. The PCB is clamped into two sets of U-shaped grooves symmetrically formed in the outer side wall of the lower end of the electrical connector, three sets of connecting holes connected with the lower ends of the three PI N pins respectively are formed in the PCB, the lower end face of the PCB abuts against the top face of the supporting boss, and the PCB is connected with the pressure sensitive element through four sets of pin tin soldering. According to the invention, high-precision detection can be realized, and the structural stability is high.

Description

technical field [0001] The invention relates to a pressure sensor technology, in particular to a pressure sensor based on ceramic resistance sensing technology. Background technique [0002] Pressure sensors are mainly used to collect the pressure of liquid or gas in the cavity or pipeline. With the continuous improvement of control technology and control system, the traditional control method is no longer suitable for the needs of the industry, and the adaptability of the traditional sensor accuracy also needs to be further improved. For example, in the automobile air-conditioning industry, traditional automobiles use pressure switches to determine the operation or stop of the system by collecting a certain pressure value of the refrigerant in the pipeline. This simple and crude control method is not only inefficient, but also wastes energy and is easy to damage the system. Replaced by a pressure sensor. In addition, traditional pressure sensors based on MEMS and ceramic ...

AI Technical Summary

Problems solved by technology

For example, in the automobile air-conditioning industry, traditional automobiles use pressure switches to determine the operation or stop of the system by collecting a certain pressure value of the refrigerant in the pipeline. This simple and crude control method is not only inefficient, but also wastes energy and is easy to damage the system. replaced by a pressure sensor

In addition, the traditional pressure sensor based on MEMS and ceramic capacitor technology will have serious drift due to the influence of temperature, especially in the case of high temperature and low temperature, the error will increase significantly, so that high-precision data acquisition cannot be carried out in the whole temperature range

This patent develops a pressure sensor based on ceramic resistance sensing technology, which can replace the traditional pressure switch to achieve precise control, and can also overcome the problem that traditional pressure sensors cannot achieve data acquisition in the full temperature range

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