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Magnetic particle flaw detection current control method and apparatus

A technology of magnetic particle inspection and control device, applied in computer control, general control system, control/adjustment system, etc., to achieve the effect of reliable work, stable and reliable output, and convenient and quick system maintenance

Inactive Publication Date: 2006-05-03
曾德文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the workpiece or electrode is in an abnormal state such as poor contact, the operator can be reminded of the flaw detection status through under-current and over-current alarms, so as to control the impact of abnormal factors on flaw detection.

Method used

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  • Magnetic particle flaw detection current control method and apparatus
  • Magnetic particle flaw detection current control method and apparatus
  • Magnetic particle flaw detection current control method and apparatus

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Experimental program
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Embodiment Construction

[0046] figure 1 Among them, 1 is a synchronous transformer; 2 is a phase-shift trigger module; 3 is a pair of anti-parallel thyristors; 4 is a magnetizing current output transformer; 5 is a magnetizing load; 7 is a grid AC voltage input terminal; 8 is an analog input module ; 9 is an analog output module; 10 is a Hall current sensor; 11 is a grid voltage measurement sensor; 12 is a programmable logic controller PLC;

[0047] figure 2 Middle (take the circumferential and longitudinal magnetization directions required by the detected workpiece as an example), T 01 , T 02 Respectively, the circumferential and longitudinal synchronous transformers used by the circumferential and longitudinal phase-shift trigger modules; T J0 , T J1 They are the cycle and vertical phase-shift trigger modules respectively; T 0 , T 1 Respectively, the circumferential and longitudinal magnetization current output transformers; T A0 , T A1 They are current output type circumferential and longi...

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PUM

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Abstract

The invention relates to a method and apparatus for controlling magnaflux inspection current which is characterized in that it makes the program level change type PLC of the control silicon trigger program to correspondent with the magnaflux inspection direction number needed by the tested unit. Each magnetization direction has a closed control circuit formed by a PLC analog value input / output module Hall current sensor, a phase trigger module, a pair of anti-parallel control silicon, a magnetic current output converter. It uses Hall current sensor to collect the magnetic current information and inputs them into the analogy value input module, then the program level change type PLC program compares the collected magnetic current information with the set point, the differential value controller outputs the voltage into the analogy value control module, the phase trigger module controls the current flow angle of the control silicon to control the input loop of the magnetic current output converter to achieve the closed adjustment of the magnetic current output converter output current.

Description

technical field [0001] The invention relates to the technical field of magnetic particle flaw detection, in particular to a control method and device for magnetic particle flaw detection current. Background technique [0002] At present, the general control of magnetic particle inspection current adopts an open-loop method. For example, an article entitled "Development of CJW-2000I AC Magnetic Particle Inspection Machine" published in the 4th issue of "Nondestructive Inspection" bimonthly magazine in 2001 discloses a magnetic particle inspection magnetization Method and device for generating electric current. The power supply supplies power to the magnetizing current output transformer through the anti-parallel thyristor, and the anti-parallel thyristor is controlled by the phase-shift trigger module, and there is no detection and feedback device for the magnetizing current generated by the magnetizing current output transformer. The working proce...

Claims

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Application Information

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IPC IPC(8): G01N27/84G05B15/00G06F17/00
Inventor 曾德文
Owner 曾德文