Weak Magnetic Inspection Technology Principle

Keywords:Wire rope inspection, wire rope tester, wire rope defect, wire rope safety, wire rope;wire rope NDT; Conveyor belt inspection; Conveyor belt NDT ;Conveyor belt testing ;steel wire rope nondestructive testing

TCK Weak Magnetic Inspection Technology, based on “Spatial Magnetic Field Vector Resultants” theory, adopts a new type of electromagnetic-magnetoelectric effect sensors (see figure 1) and achieves a non-destructive testing green technology for the ferromagnetic component.

TCK high sensitivity sensors are composed of magnetism releasing device and magnetism evaluating device. The magnetism releasing device provides a given weak electromagnetic field Bx, which interacts with the weak magnetic field B of each cross section of the test wire rope. Together they generate the inductive magnetic field By, which the magnetism evaluating device converts the magnetometive force changes of By into electric signals accurately.
Because of the structure particularity of steel cord conveyor belt, TCK Conveyor Belt Inspection System adopts horizontal + vertical response sensor arrays as the detection device: the horizontal sensors can induct the extent characteristics of metal distribution (the intrinsic component) sensitively, so that achieve the accuracy testing for breakage (including splice), fatigue, abrasion, and corrosion of steel cord through the amplitude output signals from horizontal sensors; while the vertical sensors will be more sensitive for the movement characteristics of metal distribution (the induced component) like splice, breakage…etc open-ended signals. The combination of two kinds of sensors will fully guarantee the positioning and quantitative detection performance.

After sensor arrays pick up the electromagnetic signals of steel cord of conveyor belt, the signals will be converted into digital signals through technical shaping, filtering, and A/D conversion and then input to the 32-bit ARM core; distance-measuring device outputs a pulse signal which will enter the 32-bit ARM interrupt system through anti-shake and equal accuracy tachometer circuit. Both of them take a synchronous spatial domain sampling, and upload the sampling data to the display terminal and large-capacity memory.

Display terminal and detection unit are communicated with each other by industrial Ethernet, compatible with cable or fiber-optic transmission. The Inter Process Communication is adopted unique software architecture and advanced programming techniques to achieve the real time transmission, processing, storage and display of testing data; synchronously support the functions like real time alarm, curve analysis, SMS, image reconstruction and test report print…etc.


TCK Wire Rope Inspection Technology Co., Ltd
Website: www.tck-cn.com;
Email:martinlian@tck-cn.com;




tckchinamartin tckchinamartin
26-30, M
Dec 11, 2012