Basic technical principle of three-dimensional magnetic information induction for wire rope flaw detection

Release time:

2022-06-23

The wire rope flaw detection environment is bad, the flaw detection system is interfered by many factors, because of the complex structure of the wire rope, the existence of inter-strand interference signal, broken wire identification is very difficult, how to objectively and truly reflect the damage information, to accurately and quantitatively determine the wire rope damage, is the current problem in the field of wire rope NDT.

Basic technical principle of three-dimensional magnetic information induction for wire rope flaw detection

Wire rope flaw detectionThe environment is bad, the flaw detection system is interfered by many factors, because of the complex structure of the wire rope, the existence of inter-strand interference signal, broken wire identification is very difficult, how to objectively and truly reflect the damage information, to accurately and quantitatively determine the wire rope damage, is the current problem in the field of wire rope NDT.
In the case of wire rope is saturated magnetization, due to such as structural characteristics, material defects, surface trauma, material variation and various fatigue damage and other reasons, the wire rope internal magnetic field to the external space "leakage", complete collection of these magnetic field information on the analysis of wire rope flaw detection state, the rational use of updated wire rope, to ensure safe production is very important. Now the wire rope magnetic field information collection method generally uses the Hall element method and the induction coil method. The sensing device composed of Hall element or induction coil can only complete the plane information acquisition of two-dimensional space, while the magnetic field inside and outside the steel wire rope belongs to the three-dimensional physical field that walks in space and has fuzzy and uncertain boundaries. Therefore, the above two types of devices cannot objectively reflect the safety state of the steel wire rope.
Six columnar wire wound inductive sensors are configured according to the three-dimensional space shape of the regular triangular pyramid, each sensor is used as the edge of the regular triangular pyramid, and each triangular plane is connected by the tail of the three sensors in sequence, and the geometric points of the space symmetry of the regular triangular pyramid are used to form the correlation between the sensors that are both standing and shared with each other. Magnetic field information belongs to a kind of space physical field, and the energy is concentrated in the space near the source (magnetism). The current induction coil (ring) sensor and Hall (sheet) sensor are only limited to axial (dimensional) or face-to-face (two-dimensional) acquisition. The cylindrical wire-wound inductance sensor has obvious orientation receptivity, and the three-dimensional magnetic information induction bridge device has obtained a spatial multi-orientation acquisition mode, the complete collection of magnetic field information can be completed well.
Using three-dimensional magnetic information sensing technology, each single sensor device is symmetrically arranged in three-dimensional space to form a state of overlapping spatial symmetry axis, forming a complete inclusion of the circumference of the tested wire rope flaw detection, which can accurately and effectively complete the high-resolution collection of magnetic field vector change information and magnetic aggregation information.
Luoyang Baikte Technology Development Co., Ltd. is mainly engaged in wire rope non-destructive testing,NDT for wire ropeThe company always adheres to the principle of honesty, service first, and development in good faith. All employees of the company provide excellent service to each customer with full enthusiasm.