This article proceed from the inspecting technique for current wire rope, the main idea express the special purpose wire rope testing technique and the degree of difficulty in application.And tell every one with these.Applying the high quality enterprise with OHSAS 18000 authentication, installing advance equipment can consolidate leading in the market by themselves.Acquiring ISO9000 authentication in common enterprise just then, allocate advance equipment can enhance the rate of coverage for their own market.

1.The inspecting technique for the current wire rope

1.1 Background Condition

The wire ropes testing on line is a centennial problem at all over the world.The traditional instrument application can't avoid to take place the missing testing and mistaken testing for that the wire ropes can be regarded as the infinite long structure complicated geometrical object.Only when the information and computer technique with the basis of the high-speed development at present, substitute software for instrument, and sample processing on the computer platform directly, can you surmount difficult technical problems.And achieve no missing, no mistaken testing on line.

In 1997, MTC Computer Magnetic Wire Rope Testing and diagnosing system came out in view of the fact that the technical train of thought successfully.The Chinese People possess the usable instrument of wire rope testing on line

1.2 Essential Principle

Fig.1 System Block Diagram

When the wire ropes pass through the sensor, the wire ropes are magnetized deep in the radial direction by the permanent magnet with in the senor synchronously and reach the saturation magnetization.

The leakage magnetic field of the out diffusion and the change of the magnetic flux are synchronized producing with the flaw of the broken wire, abrasion etc.The signals of the out diffusion are collected to deal with passing the AD interface.After the trans formation, the digital signals compressed input the PC machine.

In view of the fact is that the software of the three-dimensions mathematical model decompresses processing timely.In order to show the wire ropes are broken, corroded, abraded from both inside and outside, display the changes of the metallic cross-sectional area with clear and definite quantitative numerical value.

1.3 Technique Crux

The flaw of the broken wire and corrosion in the wire ropes would produce the leakage magnetic field of the out leakage.The strong and weak leakage magnetic signal of space distribution would be focused and homogenized and LED to the testing circulating way that all round directions arrange the array composite Hall device by annular magnetic focus apparatus.The international is the local flaw testing method by name.The local flaw (LF) can be quantitatively measured