Small-size and wide-range pressure sensor

Abstract

The invention relates to a small-size and wide-range pressure sensor which comprises a shell, a cavity is formed in the shell, liquid is injected into the cavity, an opening is formed in one side of the shell, a bottom cover is arranged on the opening, a first through hole is formed in one side of the shell, a connector is arranged in the first through hole, a diffused silicon sensor is arranged on the connector, a cavity wall, opposite to the other side of the bottom cover, of the shell is provided with a first outward protrusion and a second inward 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 plane and the side wall of the cavity. The pressure sensor is provided with the first inclined plane and the second inclined plane, so that the measuring range and the sensitivity are greatly improved. Moreover, the joint of the cavity and the second inclined plane adopts the inner chamfer design, so that the measuring range of the pressure sensor is further extended,and the service life of the pressure sensor is prolonged.

Description

technical field [0001] The invention relates to the field of pressure sensor equipment, in particular to a pressure sensor with small size and large range. 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 often occurs in these parts , making the...

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, the technical solution adopted in the present invention is: a small-sized, large-range pressure sensor, including: a housing, which has a A cavity, the cavity is filled with liquid, and one side of the housing is provided with an opening that communicates with the cavity, the opening is provided with a bottom cover, and one side of the housing is provided with an opening that communicates with the cavity. The first through hole is provided with a connector in the first through hole, and the diffused silicon sensor is arranged on the connector, and the housing has an outward opening relative to the cavity wall on the other side of the bottom cover. The first protrusion and the second protrusion inward, the first protrusion has a first slope between the highest point and the lowest point, and the second protrusion has a second slope between the highest point and the lowest point , and the junction between the second slope and the side wall of the cavity has an inner chamfer

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