Strain type three-dimensional acceleration sensor

Abstract

The invention discloses a strain type three-dimensional acceleration sensor and belongs to the field of a three-dimensional sensor. The sensor comprises an elastic body, fixing glue, a mass block and eight strain foils, wherein an axial cross section of the elastic body is inverted T-shaped; the lower end of the elastic body is of a spoke structure; the lower end is of a cylinder structure and an upper end face of the elastic body is fixedly connected to the mass block through the fixing glue; four strain foils are symmetrically arranged on a same spoke bar of a spoke, particularly, a first strain foil and a third strain foil are arranged on the upper surface of the spoke bar and a second strain foil and a fourth strain foil are arranged on the lower surface of the spoke bar; and four strain foils, namely, a fifth strain foil, a sixth strain foil, a seventh strain foil and an eighth strain foil, are uniformly arranged on a cylinder of the elastic body along a circumferential direction. The strain type three-dimensional acceleration sensor can be used for simultaneously detecting the three-dimensional vibration states of an object.

Description

technical field [0001] The invention relates to a strain sensor, in particular to a strain three-dimensional acceleration sensor. Background technique [0002] The current three-dimensional acceleration sensors are divided into two structural forms according to whether the three-dimensional information is acquired through a single inertial mass block or multiple inertial mass blocks: composite type and integrated type. The former is to synthesize multiple unidirectional acceleration sensors in an orthogonal manner, and generally each direction of acceleration information corresponds to a mass block; the latter is to complete the measurement of acceleration in three directions through a single inertial mass block. In the beginning, the three-dimensional acceleration sensor mainly integrated multiple single-dimensional acceleration sensors to obtain three-dimensional information. Due to the existence of three mass blocks, the inconsistency of the center of mass brought measure...

AI Technical Summary

Problems solved by technology

In the beginning, the three-dimensional acceleration sensor mainly integrated multiple single-dimensional acceleration sensors to obtain three-dimensional information. Due to the existence of three mass blocks, the inconsistency of the center of mass brought measurement errors, and due to the existence of multiple single-dimensional acceleration sensors The axial sensors are combined together, yes the volume of the whole sensor is relatively large

In terms of the application of strain gauges, Japan proposed a strain-type full-shear three-dimensional acceleration sensor, but this kind of sensor requires relatively high processing accuracy and high manufacturing process costs.

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