High-precision measurement system for three-dimensional microdeformation of mechanical device in high-low-temperature case

Abstract

The invention provides a high-precision measurement system for three-dimensional microdeformation of a mechanical device in a high-low-temperature case, The measurement system comprises a string, a three-dimensional air flotation assembly and three-direction photoelectric displacement sensing devices, wherein each air flotation unit comprises an air flotation shaft and an air flotation sleeve; the three-direction photoelectric displacement sensing devices are respectively installed on an x-direction air flotation unit, a y-direction air flotation unit and a z-direction air flotation unit and are used for measuring the displacements on an x direction, a y direction and a z direction; an x-direction air flotation shaft is installed on a fixed plate; an x-direction air flotation sleeve is installed on the x-direction air flotation shaft in a sliding manner; the x-direction air flotation sleeve is fixedly connected with a y-direction air flotation shaft; a y-direction air flotation sleeve is installed on the y-direction air flotation shaft in a sliding manner; the y-direction air flotation sleeve is fixedly connected with a z-direction air flotation sleeve; a z-direction air flotation shaft is installed on the z-direction air flotation sleeve in a sliding manner; the upper end of the string is connected with a measured piece, and the lower end of the string is connected with the z-direction air flotation shaft of the three-dimensional air flotation assembly. The invention provides the high-precision measurement system, which has high measurement precision and is used for measuring deformation amount of the measured piece in the high-low-temperature case.

Description

technical field [0001] The invention relates to a high-precision measurement system for three-dimensional micro-deformation, in particular to a measurement system for mechanical devices in high and low temperature environments. Background technique [0002] During the stiffness test, it is necessary to apply a force in a certain direction of the tested part. Under the action of force or torque, the tested part will be deformed, and the stiffness can be calculated by measuring the deformation in the direction of the applied force. However, the shape of the measured piece is irregular, and under the action of external force, in addition to the deformation in the direction used for stiffness calculation, it may also produce rotation in the three directions of x, y, and z and deformation in the other two directions. Since the stiffness test examines the deformation of the point of action, the small rotation of the measured part around a certain axis has basically no effect on th...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the low measurement accuracy of existing measurement systems for mechanical devices in high and low temperature environments, the present invention provides a high-precision measurement system for three-dimensional micro-deformation of mechanical devices in high and low temperature boxes with high measurement accuracy

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