A temperature adaptive compensation method for laser displacement sensor

A technology of self-adaptive compensation and laser displacement, applied in the field of sensors, can solve problems such as sensitivity to temperature changes, achieve the effects of improving temperature compensation accuracy, having self-adaptive performance, and solving deviations

Active Publication Date: 2020-08-25
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing laser displacement sensor is sensitive to temperature changes, the present invention proposes a temperature adaptive compensation method for the laser displacement sensor

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  • A temperature adaptive compensation method for laser displacement sensor
  • A temperature adaptive compensation method for laser displacement sensor
  • A temperature adaptive compensation method for laser displacement sensor

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that for those of ordinary skill in the art, a number of modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] Reference figure 1 Shown is a schematic diagram of a testing device used in an embodiment of a temperature compensation method for a laser displacement sensor of the present invention. As shown in the figure, it includes a laser displacement sensor 1, a standard test target 2, a workbench 3, and a high and low temperature test box 4.

[0044] use figure 1 For the testing device in, in an embodiment of the laser displacement sensor temperature compensation method of the...

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Abstract

The invention discloses a temperature self-adaptive compensation method for a laser displacement sensor, and the method comprises the following steps of respectively testing the output displacement values of the laser displacement sensor at different temperatures under different distance conditions; obtaining temperature characteristic parameter values of a displacement-temperature change curve ofthe laser displacement sensor under different distance conditions through polynomial fitting; performing polynomial fitting on the temperature characteristic parameter values at different distances to obtain calculation coefficients of the temperature characteristic parameters of the laser displacement sensor under different distance conditions; and calculating a temperature characteristic parameter corresponding to an absolute displacement value obtained in the measurement process to obtain a temperature compensation value of the displacement, and compensating the displacement value obtainedby actual measurement by using the temperature compensation value. The temperature self-adaptive compensation method for the laser displacement sensor can adapt to any position in a full range, effectively solves the deviation caused by different temperature coefficients at different distances, and not only has self-adaptive performance, but also greatly improves the temperature compensation precision.

Description

Technical field [0001] The invention relates to a sensor technology, in particular to a temperature adaptive compensation method of a laser displacement sensor. Background technique [0002] The laser displacement sensor is a displacement sensor based on the principle of triangular distance measurement. It has excellent characteristics such as non-contact, high precision, high speed, and absolute measurement, and has become the mainstream measuring instrument in the field of modern industrial measurement. [0003] However, temperature changes have a serious impact on the output of the laser displacement sensor. The temperature characteristics of laser displacement sensors at home and abroad are generally about 0.05%FS / ℃. Take the laser displacement sensor with accuracy ±0.1%FS and range 20mm as an example. If the temperature difference reaches ±10℃, the change in the measured displacement value caused by its temperature is about It is ±0.1mm, and the relative error is about ±0.5%F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
CPCG01B11/026
Inventor 赵辉陶卫吕娜南卓江崔斌李智刘凯媚冯宇孙昊
Owner SHANGHAI JIAO TONG UNIV
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