Pressure sensor

Abstract

The invention discloses a pressure sensor. The pressure sensor comprises an outer shell; the outer shell is provided with a connecting opening; the exterior of the connecting opening is provided with an interface screw thread; a pressure-introducing hole is formed at the middle of the connecting opening; a circuit board is arranged in the outer shell; one surface of the circuit board is provided with a pressure chip and a module circuit group; the other surface of the circuit board is provided with leads; the leads extend out from the outer shell; a clamping ring is arranged between the circuit board and the outer shell; a filling sheet is arranged in the outer shell; and the outer shell is filled with an insulating liquid. The pressure sensor of the invention has the advantages of simple and ingenious structure, low production cost, high impact resistance, high insulation performance, and high measurement precision, and can effectively reduce zero drift phenomena.

Description

technical field [0001] The invention relates to pressure detection equipment, in particular to a pressure sensor. Background technique [0002] Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools , pipeline and many other industries. In traditional pressure sensors, the pressure chip is usually set on the circuit board and placed in the casing, and the pressure chip needs to be connected to the external external circuit board through an adapter board. Usually, a two-layer housing is required. Because there are two layers of housing, The size of the pressure sensor is large, and the cost is not easy to reduce. At the same time, because the pressure chip and the circuit boar...

AI Technical Summary

Problems solved by technology

In traditional pressure sensors, the pressure chip is usually set on the circuit board and placed in the casing, and the pressure chip needs to be connected to the external external circuit board through an adapter board. Usually, a two-layer housing is required. Because there are two layers of housing, The size of the pressure sensor is large, and the cost is not easy to reduce. At the same time, because the pressure chip and the circuit board need to be pressurized, crimped, and then connected to the external circuit, the pressure chip will generate internal stress and zero point drift ; and the existing pressure sensor directly connects the pressure chip and the analog-to-digital conversion module, which is not easy to control. When the analog-to-digital conversion module performs conversion and transmission, it is easy to cause data loss and errors, which affects the accuracy of pressure sensor measurement

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