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Surface micro-scratch detector

A detector and scratch technology, applied in the direction of optical testing flaws/defects, etc., can solve the problems of limited measurement accuracy, camera accuracy, insufficient scratch measurement accuracy, and inability to detect scratch depth characteristics, and improve repeat positioning accuracy. Effect

Inactive Publication Date: 2019-07-23
CHANGCHUN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lens detection method based on CCD imaging principle, which is applied in the industry to measure scratches, its measurement accuracy is limited by the accuracy of the camera, and the depth characteristics of scratches cannot be detected, and there are also shortcomings of insufficient scratch measurement accuracy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0069] This embodiment is an embodiment of a micro-scratch detector on the surface. An oval groove is machined under the base as a detection window. The gear rotation mechanism is connected with the bottom of the base by bolts, and an endoscope lens is set on one side of it, which can roughly locate the scratch position, so that the detector can locate the scratch position. A sliding block moving device is installed inside the base, and an elliptical through hole is processed on the upper surface of the sliding block, and a through-hole plastic block is screwed on it. The probe is placed vertically in the plastic block, and the laser emitted by the probe can face the axis to be measured through the through hole. A pair of parallel through holes are processed in the side of the slide block, and linear bearings are arranged in them, and the cylindrical shaft passes through the linear bearings and is fixed on both sides of the base. An eccentric wheel transmission mechanism is ...

specific Embodiment 2

[0071] When the endoscope lens is positioned at the scratch in the horizontal position, after turning the gear to rotate the wrench, the detector can detect the scratch depth in the horizontal position.

[0072] The above-mentioned sensor probe can be a spectral confocal sensor or a laser sensor.

[0073] Considering the cost performance and accuracy requirements of the detection device, a spectral confocal lens sensor can be selected to measure the depth and width of scratches. The detection is quickly completed online in a non-contact manner, which improves the speed of scratch depth measurement, ensures the validity of the detection data, and solves the efficiency and accuracy problems caused by the current manual detection.

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Abstract

The invention discloses a surface micro-scratch detector, including: a base disposed inside a casing, a slider moving device, an eccentric gear transmission mechanism, a grating ruler reading head moving device and a gear rotating mechanism; wherein an endoscope lens is used to roughly locate the scratch position and then a sensor probe is aligned to the scratch side to complete the rough positioning of the scratch. After the rough positioning is completed, the eccentric wheel mechanism is used to drive the slider moving device to span the scratch position, and the height difference of the process is acquired, and the depth information of the scratch is extracted. The acquisition of the width information relies on a large drop point of the two displacements at the beginning and end of theprocess, and the distance between the two points is obtained to be the width information. The eccentric gear transmission mechanism and the grating ruler reading head moving device can ensure accuratecontrol on the measurement positions of the sensor probe and improve the repeated positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of machine vision, and relates to a surface micro-scratch detector and a detection method. Background technique [0002] Machine vision is a comprehensive technology that integrates digital image processing, machinery, control, optics, computer and other technologies. Machine vision systems can realize non-contact detection of targets, can quickly acquire a large amount of information, and are easy to process automatically. Therefore, machine vision technology has attracted people's attention as an important detection technology, and has been more and more widely used in the detection field. [0003] At present, the measurement of surface scratches on shaft parts still relies on manual traditional detection. According to on-site feedback, the traditional detection method is that inspectors only rely on fingers to touch the scratch position for depth and width detection. Inspectors are easily affected by th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/95
CPCG01N21/95
Inventor 高金刚王华王立东孙志鹏张克木赵伟甫张爽王文忠潘鸣宇侯岱双杨青山
Owner CHANGCHUN INST OF TECH
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