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Multi-laser displacement sensor system calibration method and device

A displacement sensor, system calibration technology, applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problems of low accuracy, low calibration efficiency, slow user calibration speed, etc., to achieve the effect of rapid calibration

Active Publication Date: 2021-05-07
SBT ULTRASONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the user calibration speed is slow and the accuracy rate is low, resulting in low calibration efficiency

Method used

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  • Multi-laser displacement sensor system calibration method and device
  • Multi-laser displacement sensor system calibration method and device

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Experimental program
Comparison scheme
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Embodiment 1

[0041] figure 1 It is a flow chart of a multi-laser displacement sensor system calibration method provided in Embodiment 1 of the present invention. This embodiment is applicable to the calibration of a multi-laser displacement sensor system, and the method can be executed by a multi-laser displacement sensor system calibration device. see figure 1 , the multi-laser displacement sensor system calibration method specifically includes the following steps:

[0042] S110. Control each laser displacement sensor to collect an image of the first calibration block, and extract image point coordinates in the image of the first calibration block.

[0043] Wherein, the multi-laser displacement sensor system includes multiple laser displacement sensors, and feature points are set in advance on the cross-section of the first calibration block opposite to the laser displacement sensors, so that the object point coordinates of the feature points can be obtained. Wherein, the object point r...

Embodiment 2

[0056] figure 2 It is a flow chart of a multi-laser displacement sensor system calibration method provided in Embodiment 2 of the present invention. This embodiment is applicable to the calibration of a multi-laser displacement sensor system, and the method can be performed by a multi-laser displacement sensor system calibration device. see figure 2 , the multi-laser displacement sensor system calibration method specifically includes the following steps:

[0057] S210. Fix the first calibration block on the fixture, and install the multi-laser displacement sensor system on the linear motion module.

[0058] Wherein, the first calibration block is distributed linearly along the first direction on the fixture; the linear motion module is used to drive the multi-laser displacement sensor system to move linearly along the second direction; wherein, the first direction is perpendicular to the second direction.

[0059] Specifically, the first calibration block is fixed on the f...

Embodiment 3

[0086] Figure 4 It is a schematic structural diagram of a multi-laser displacement sensor system calibration device provided in Embodiment 3 of the present invention. This embodiment is applicable to the calibration of a multi-laser displacement sensor system. See Figure 4 The multi-laser displacement sensor system calibration device is used to implement the multi-laser displacement sensor system calibration method described in any of the above embodiments. The multi-laser displacement sensor system calibration device includes: a fixture 310, a linear motion module 320 and a controller 330; a fixture 310 Used to fix the calibration block 350; the linear motion module 320 includes a movable module 321; the movable module 321 is used to drive the multi-laser displacement sensor system 340 to move linearly along the second direction; wherein, the calibration block 350 is formed on the fixture 310 along the first direction Linear distribution; the first direction is perpendicula...

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Abstract

The invention discloses a multi-laser displacement sensor system calibration method and device. The method comprises the following steps: controlling each laser displacement sensor to collect an image of a first calibration block, and extracting image point coordinates in the image of the first calibration block; reducing the sampling interval of the distance between the multi-laser displacement sensor system and the first calibration block; according to the object point coordinate of the first calibration block and the image point coordinate obtained by each laser displacement sensor, obtaining the mapping relation between the object point and the image point of each laser displacement sensor; and calculating object point coordinates of the second calibration block according to the mapping relation and the image point coordinates in the image of the second calibration block, and converting all the calculated object point coordinates of the second calibration block into a coordinate system of the known object point coordinates of the second calibration block. According to the invention, the problems of low user calibration speed and low accuracy are solved, and the effect of automatically and quickly calibrating the multi-laser displacement sensor system is achieved.

Description

technical field [0001] Embodiments of the present invention relate to a multi-laser displacement sensor system calibration technology, in particular to a multi-laser displacement sensor system calibration method and device. Background technique [0002] At present, there are two types of laser displacement sensors: integrated type and split type. As far as calibration is concerned, the integrated sensor has been calibrated for the laser triangulation system before leaving the factory, including the calibration of the internal parameters of the camera and the calibration of the relative position between the camera and the laser; while the calibration of the split multi-laser displacement sensor needs to be completed by the user. [0003] However, the user calibration speed is slow and the accuracy rate is low, resulting in low calibration efficiency. Contents of the invention [0004] The invention provides a multi-laser displacement sensor system calibration method and de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 周宏建李衍佳
Owner SBT ULTRASONIC TECH CO LTD