Detection method and detection system for small holes in metal profiles based on eddy current sensor

An eddy current sensor and metal profile technology, which is applied in the direction of material analysis, instruments, and measuring devices by electromagnetic means, can solve the problems of insufficiency of small holes in metal profiles, false detection of small holes, and false detection, and achieve a simple and reliable detection method. , The effect of simple circuit and simple installation

Active Publication Date: 2015-10-21
无锡普瑞精密技术有限公司
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Problems solved by technology

However, since the sensor probes for general on-line detection are all larger than 4mm, the detection of small holes in metal profiles, including blind holes and through holes, is insufficient, and the detection of small holes in metal profiles has high requirements for the installation position of the sensor, so metal The detection of profile small holes is often missed or falsely detected due to the size of the sensor or the installation accuracy; at the same time, the non-metallic substances such as plastic film and dust on the surface of the metal profile also have the influence of false detection on the detection of small holes

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  • Detection method and detection system for small holes in metal profiles based on eddy current sensor
  • Detection method and detection system for small holes in metal profiles based on eddy current sensor
  • Detection method and detection system for small holes in metal profiles based on eddy current sensor

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Embodiment Construction

[0028] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, the composition of the detection system used to realize the present invention is as follows, consisting of an eddy current sensor probe 3 and a signal controller 4 . The eddy current sensor probe 3 is placed above the metal profile 1 to be detected, and the eddy current sensor probe 3 is connected with the controller 4 .

[0030] figure 2 is a cross-sectional view of the eddy current sensor probe 3 . figure 2 The eddy current sensor probe 3 is composed of a Hall sensor 301 , a coil bobbin 302 , a shell 303 , an enameled wire 304 , a magnetic ring 305 and a wire 306 . The enameled wire 304 is wound on the bobbin 302; a magnetic ring 305 is placed inside the bobbin 302, and the two are closely matched; a hall sensor 301 is placed inside the magnetic ring 305, and is fixed with insulating glue. The bobbin...

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Abstract

The invention discloses a metal section small hole detection method and system based on an electrical vortex sensor. The detection system consists of an electrical vortex sensor probe and a signal controller, wherein the signal controller comprises a signal generation circuit and a signal processing circuit. The electrical vortex sensor probe is arranged over against a small hole in a metal section, and is not in contact with the metal section; when the distance between the probe and the metal section is defined, and the small hole in the metal section passes through the probe, a signal output by the signal processing circuit has jump change. The method and the system are suitable for detecting the small hole in the metal section, and can especially and predominantly detect the small hole with nonmetallic substance interference on the surface.

Description

technical field [0001] The invention relates to the field of on-line detection technology, in particular to a detection method for on-line detection of small hole features on a metal profile with a flat surface while avoiding the influence of non-metallic substances on the surface of the metal profile, and a corresponding detection system. Background technique [0002] The demand for metal profiles is large and the production volume is large. However, at present, the detection of the surface characteristics of metal profiles is often done through offline manual inspection, which not only affects the production efficiency, but also easily leads to false detection and missed detection. A viable alternative is to use online testing. On-line inspection is a technology for real-time inspection of the produced products under the condition of conforming to the production beat. However, since the sensor probes for general on-line detection are all larger than 4mm, the detection of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/90G01N27/9093
Inventor 周德强尤丽华左晓芳李唐张秋菊
Owner 无锡普瑞精密技术有限公司
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