Electromagnetic induction type metal part neglected loading detection and detection method

A technology of electromagnetic induction and induction device, which is applied in the field of missing metal parts detection device, can solve the problems of product failure, need special personnel operation, accidents, etc., and achieve the effect of reducing workload, wide application value, convenient and safe operation
CN101907730AInactive Publication Date: 2010-12-08CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2010-12-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an electromagnetic induction type metal part neglected loading detector which is characterized by comprising an induction device (1), a data acquisition and processing device (2) and a man-machine interaction device (3). The invention also relates to a detection method of the electromagnetic induction type metal part neglected loading device. In the invention, the moves of a metal part near an induction coil are accurately monitored in real time through identifying the changes of the induced electromotive force of the induction coil. Aiming at the change characteristics of induction signals, the invention proposes a time-domain multi-characteristic value identification method for judging signal changes, and the method comprises the following steps of: firstly, filtering out power frequency interference signals by utilizing wavelet transforms; comparing signal data acquired in real time with a reference signal according to the periodic change rule of basic signals; identifying and establishing an abnormal multi-characteristic value to reconstruct the signal data within a time-domain range; and carrying out multi-stage optimization intelligent identification and judgment after the acquisition of all characteristic values is completed. The invention can be applied to the diagnosis of the neglected loading of metal parts and realizes open type on-line detection in a non-contact and real-time mode.
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Description

technical field

[0001] The invention relates to the field of missing-installation detection of metal parts, in particular to a detection device and method for missing-installation of metal parts using the principle of electromagnetic induction and the principle of eddy current. Background technique

[0002] In order to realize the detection of missing metal parts in the manual assembly process of various industrial productions (especially automobile industrial production), some special devices and methods have been adopted at home and abroad. Although the methods of missing detection currently adopted have their own advantages, there are still some deficiencies, such as the inability to realize real-time detection, the detection object is single (a certain device can only realize the missing detection of a specific object), the detection There are many restrictions. The commonly used methods for missing parts detection are:

[0003] 1) Image recognition and detection techn...

Claims

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