Detection system and method for broken needle in workpiece

A detection system and detection method technology, which is applied in the field of needle detection machines, can solve problems such as inability to detect metal workpieces, achieve the effect of improving detection accuracy and avoiding detection interference
CN106199735AInactive Publication Date: 2016-12-07NINGBO JIUZONG INTELLIGENT TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO JIUZONG INTELLIGENT TECH
Publication Date
2016-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of needle detectors, in particular to a detection system and method for a broken needle in a workpiece. The detection system comprises at least one detection unit and a control unit, wherein the detection units comprise magnetizing modules for magnetizing a to-be-detected workpiece and magnetism detecting modules for detecting whether the large residual magnetism exists in the magnetized to-be-detected workpiece or not; the control unit is used for collecting the detection data at the magnetism detecting modules and carrying out corresponding processing operation to output a corresponding control instruction. By means of the detection system and method for the broken needle in the workpiece, a broken needle in a weak-magnetism metal workpiece can be well detected.
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Description

technical field

[0001] The invention relates to the technical field of needle detectors, in particular to a detection system and method for interrupted needles of workpieces. Background technique

[0002] When the existing needle detector performs detection, there is a fixed-strength magnetic field in the detection area. When ferromagnetic substances enter the magnetic field, the magnetic field strength will be changed there. The data acquisition module can collect the magnetic field strength change signal and send it to the data Processing module, the data processing module can send its processing result to the control circuit, so as to complete the detection work. Based on the above working principle, when the existing needle detector detects weakly magnetic metal workpieces (such as aluminum alloy castings, etc.), the body of the weakly magnetic metal workpiece will generate a large eddy current inside when passing through the detection area. The eddy current will cause ...

Claims

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