Display capability tester of magnetic powder or magnetic suspension

Abstract

The present invention provides a display capability tester of magnetic powder or a magnetic suspension. The tester comprises: a display apparatus, wherein the display apparatus comprises a display test block, a center conductor for providing a magnetic field for the display test block, and a connection electrode for electrifying the center conductor, and the display test block is provided with an artificial defect; a magnetization power supply, wherein the magnetization power supply is connected to the connection electrode, and provides an adjustable magnetization current for the connection electrode; a demagnetization apparatus, wherein the demagnetization apparatus comprises a demagnetizer connected to the connection electrode, and is provided for demagnetizing the display test block; a control apparatus, wherein the control apparatus is provided for electrically connecting the magnetization power supply and the demagnetization apparatus, and comprises a magnetization switch for opening the magnetization power supply, a demagnetization switch for opening the demagnetization apparatus, and a current adjustment mechanism for adjusting a magnetization current of the magnetization power supply; and an indication apparatus, wherein the indication apparatus comprises an ammeter for indicating a magnetization current value of the magnetization power supply. The display capability tester of the present invention mainly has the following advantages that: by providing the standard display test block and the adjustable magnetization current, a test platform with characteristics of convenience, accuracy and capability of reference comparison is provided for display capability of the magnetic powder or the magnetic suspension.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to a display capability tester for magnetic powder or magnetic suspension liquid used in magnetic particle flaw detection. Background technique [0002] Non-destructive testing (Non-destructive testing, NDT), also known as non-destructive testing, refers to the use of heat, sound, light, electricity, magnetism, etc. Changes in physical quantities to detect internal and surface defects in various engineering materials, parts, structural parts, etc. Non-destructive testing is widely used in the detection of metal materials, non-metal materials, composite materials and their products, as well as some electronic components. [0003] Magnetic particle testing is the most commonly used type of nondestructive testing. It detects defects on the surface or near the surface of an object by accumulating magnetic powder or magnetic suspension in the leakage magnetic field near the defect...

AI Technical Summary

Problems solved by technology

However, the general fixed flaw detector is bulky and is mainly used for magnetic particle flaw detection of fixed products. It is not suitable for the test of the display ability of the magnetic suspension sample in the laboratory. At the same time, the fixed magnetic particle flaw detector cannot display the dry magnetic particle. test, the portable flaw detector cannot provide a controllable magnetic field

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