A method for center positioning of calibration points of thermal protector based on machine vision

Abstract

The invention discloses a method for locating the center of the calibration point of a thermal protector based on machine vision, including image preprocessing, target extraction, edge extraction of the calibration point area, and determination of the center position of the calibration point. The invention uses improved random Hough transform to extract The edge of the circle is detected to obtain the center position of the calibration point. The present invention overcomes the situation that the traditional Hough transform detection circle has a large amount of calculation and takes up too much memory, and greatly improves the detection speed; the present invention overcomes the problem that the random circle detection algorithm (RCD) detects the edge points of the image in complex backgrounds. There is a problem of poor robustness under the environment, and the robustness of the system is improved, so that the thermal protector calibration point center positioning can enhance the adaptability to the environment, and the application field of the system is wider.

Description

technical field [0001] The invention belongs to the technical field of thermal protectors, and in particular relates to a method for locating the center of a calibration point of a thermal protector based on machine vision. Background technique [0002] Thermal protector is a kind of circuit protection device, which is widely used in various electrical products. Its main working principle is to keep the circuit connected at room temperature, and cut off the circuit when the temperature exceeds the set threshold. The main function is the internal bimetal, but the jump temperature of the bimetal is closely related to the depth of the calibration point, so the depth measurement of the calibration point is an important content in product inspection. Due to the small size of the calibration point, the first step when using structured light depth detection is to locate the center point of the calibration point to ensure that the structured light can accurately hit the deepest part...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex optical conditions, many interference factors, and unsatisfactory detection results of current thermal protectors, this invention proposes a center positioning method for calibration points of thermal protectors based on machine vision

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