Pressure sensor for measuring height of oil level in turnout point machine and manufacturing method of pressure sensor

Abstract

The invention aims at disclosing a pressure sensor for measuring the height of the oil level in a turnout point machine and a manufacturing method of the pressure sensor. The pressure sensor comprises a casing, a pressure sensitive core body, a signal amplification circuit board and a compensation circuit board, wherein the surface of the casing is marked with scales, the pressure sensitive core body is arranged on a base cap, the base cap is fixedly arranged at the lower end of the casing, one end of the signal amplification circuit board is connected with the pressure sensitive core body, the other end of the signal amplification circuit board is connected with one end of the compensation circuit board, the upper end of the casing is provided with a connecting joint, and the other end of the compensation circuit board is connected with an external shielding wire at the connecting joint part. Compared with the prior art, the pressure sensor has the advantages that the on-line detection of the oil level of the turnout point machine is realized, the effect of simultaneously monitoring the oil pressure and the oil level height is realized, the pressure sensor is suitable for being used in the severe environment, the normal operation of the point machine is ensured, the operation safety of railways is guaranteed, and the goals of the pressure sensor are realized.

Description

technical field [0001] The invention relates to a pressure sensor and a manufacturing method thereof, in particular to a pressure sensor for measuring the oil level in a switch machine and a manufacturing method thereof. Background technique [0002] Turnout point machines are the most commonly used equipment in railways. With the large-scale construction and development of high-speed railways, the quality and requirements for turnout point machines are getting higher and higher. [0003] At present, the oil level of the turnout point machine is manually surveyed with a ruler at regular intervals, which has little effect. Under the influence of factors such as the harsh environment on site, there are often hidden dangers; the liquid level is currently detected by probe marks, Gravitational accelerations such as train aisles often affect the actual and marked variation of the liquid level. [0004] In addition, oil pressure and oil level monitoring also have shortcomings suc...

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Problems solved by technology

[0003] At present, the oil level of the turnout switch machine is manually surveyed by using a ruler regularly, which has little effect. Under the influence of factors such as the harsh environment on site, there are often hidden dangers; the liquid level is currently detected by probe marks, Acceleration of gravity such as train aisles tends to affect the actual and marked variation of the liquid level

[0004] In addition, oil pressure and oil level monitoring also have shortcomings such as unquantifiable, unintuitive, and inability to query data.

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