Weighing pressure sensor with high oil injection efficiency and oil injection method

Abstract

The invention relates to a weighing pressure sensor with high oil injection efficiency and an oil injection method. The weighing pressure sensor comprises a shell, the shell is internally provided with a cavity, the cavity is filled with liquid, one side of the shell is provided with an opening, the opening is provided with a bottom cover, one side of the shell is provided with a first through hole, the first through hole is internally provided with a connector, the connector is provided with a diffused silicon sensor, the cavity wall of the other side, opposite to the bottom cover, of the shell is provided with an outward first protrusion and an inward second protrusion, a first inclined plane is formed between the highest point and the lowest point of the first protrusion, a second inclined plane is formed between the highest point and the lowest point of the second protrusion, and an inner chamfer is arranged at the joint of the second inclined surface and the side wall of the cavity. The pressure sensor is provided with the first inclined surface, the second inclined surface and the inner chamfer, so that the measuring range and the sensitivity are greatly improved. And moreover, the oil injection efficiency is high, oil injection is uniform, and no bubble is generated.

Description

technical field [0001] The invention relates to the field of pressure sensor equipment, in particular to a weighing pressure sensor with high oil injection efficiency and an oil injection method. Background technique [0002] As our road transportation network becomes more and more developed, correspondingly, the truck transportation business also develops rapidly. At the same time, with the refined management of transportation and the requirements of transportation safety, it is necessary to monitor the vehicle pressure and collect the micro-deformation data of the frame during transportation, and these need to be collected by pressure sensors. [0003] However, when the conventional pressure sensor is subjected to high pressure, the stress in the compressed part is relatively concentrated, mainly due to the stress accumulation at the right angle outside the pressure part and the right angle part or acute angle stress accumulation of the inner cavity wall, and tear damage o...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the right-angle part of the existing pressure sensor is easily torn and damaged due to stress accumulation, and how to improve the oil injection efficiency, the technical solution adopted in the present invention is: a weighing pressure sensor with high oil injection efficiency, including: a shell , the housing has a cavity, the cavity is filled with liquid, and one side of the housing is provided with an opening communicating with the cavity, the opening is provided with a bottom cover, and one side of the housing is There is a first through hole communicating with the cavity, a connector is arranged in the first through hole, and a diffused silicon sensor is arranged on the connector, and the casing is opposite to the bottom cover on the other side. The cavity wall has an outward first protrusion and an inward second protrusion, the highest point and the lowest point of the first protrusion form a first slope, and the highest point and the lowest point of the second protrusion A second slope is formed between the points, and the junction between the second slope and the side wall of the cavity has an inner chamfer;

Images