Displacement measurement method and system thereof

Abstract

The invention provides a displacement measurement method. The method comprises the following steps: carrying out coding on a first component, wherein light irradiated to the coding can be diffracted so as to form a diffraction fringe; setting a corresponding relation of a code value of the coding and an absolute position; when the coding on the first component receives light irradiation, scanning the light after being diffracted by the coding on the first component so as to acquire a first signal; decoding the first signal so as to acquire a current absolute position of the first component; analyzing absolute position changes of the first component so as to acquire a displacement of the first component. Through the light, displacement measurement is realized; measurement precision is high and a displacement measurement effect is good.

Description

technical field [0001] The invention relates to the field of displacement measurement, in particular to a displacement measurement method and system. Background technique [0002] In the prior art, it is necessary to measure the displacement of various objects, especially in industrial production, more precise displacement measurement is required. [0003] The inventors found that due to the limitations of existing displacement measuring devices, in some productions that require accurate displacement measurement, high-precision displacement measurement cannot be achieved, which affects production. For example, the measurement method of capacitive grid is used to convert the displacement into a voltage value to realize the displacement measurement. Since the accurate measurement of the voltage requires the use of a large number of other electrical devices, the measurement process is cumbersome. Due to the limitations of the device itself, such a measurement method cannot be r...

AI Technical Summary

Problems solved by technology

[0003] The inventor found that due to the limitations of existing displacement measurement devices, in some productions that require accurate measurement of displacement, high-precision displacement measurement cannot be achieved, which affects production

For example, the measurement method of capacitive grid is used to convert the displacement into a voltage value to realize the displacement measurement. Since the accurate measurement of the voltage requires the use of a large number of other electrical devices, the measurement process is cumbersome. Due to the limitations of the device itself, such a measurement method cannot be realized. Higher Accuracy Displacement Measurement

However, other forms of measurement methods need to start from the zero point for each measurement. This measurement process is also more cumbersome, and since it starts from the zero point, there will be inevitable cumulative errors, resulting in inaccurate measurement results.

Images