阅读说明：本技术 一种无损检测系统 (Nondestructive testing system ) 是由 付乐伟 于 2019-10-31 设计创作，主要内容包括：本发明属于无损检测领域,尤其涉及一种无损检测系统,本发明采用非饱和磁激励检测原理,钢丝绳是由高质量碳素钢丝绕制而成的,具有良好的导磁性能。在空气中,条形磁铁外部的磁场强度是以两极连线为中心的圆形对称分布。(The invention belongs to the field of nondestructive testing, and particularly relates to a nondestructive testing system. In the air, the magnetic field intensity outside the bar magnet is circularly and symmetrically distributed by taking a two-pole connecting line as a center.)

1. The nondestructive testing system of claim 1, comprising a wire rope surface leakage magnetic field acquisition module encouraged by unsaturated magnetism j, an upper computer module and a 4G wireless transmission module, wherein the wire rope leakage magnetic field acquisition module is an unsaturated magnetic excitation unit, a sensor array, a pulse generation and acquisition unit, a main control unit and a leakage magnetic field data storage unit.

2. The nondestructive testing system of claim 1, wherein the unsaturated magnetic excitation unit is responsible for detecting loading of the steel wire rope by the unsaturated magnetic excitation source.

Technical Field

The invention belongs to the field of nondestructive testing, and particularly relates to a nondestructive testing system.

Background

The nondestructive testing technology is developed in industrial production and practice, the existing nondestructive testing instrument is inconvenient to assemble and disassemble, complex in structure, high in manufacturing process requirement, heavy in device, inconvenient to use and low in sensitivity, a nondestructive testing system is developed, and the nondestructive testing system has great significance to the field of nondestructive testing, especially nondestructive testing of steel wire ropes.

Disclosure of Invention

The invention aims to solve the problems of inconvenient assembly and disassembly, complex structure, higher requirement on a manufacturing process, heavy device, inconvenient use and low sensitivity of the nondestructive testing instrument.

The invention adopts the unsaturated magnetic excitation detection principle, and the steel wire rope is formed by winding high-quality carbon steel wires and has good magnetic conductivity. In the air, the magnetic field intensity outside the bar magnet is circularly and symmetrically distributed by taking a two-pole connecting line as a center. The permeability is more than 1000 times greater than that of air, so that when a steel wire rope section is placed in the air, the external magnetic field of the steel wire rope section is changed. The steel wire rope detection device comprises a steel wire rope, a plurality of permanent magnets, a magnetic field and a controller, wherein the permanent magnets are uniformly straightened along the circumferential direction of the steel wire rope as shown in a steel wire rope detection technical schematic diagram under unsaturated magnetic excitation, the permanent magnets can form a magnetic field around the steel wire rope, the magnetic field can magnetize the steel wire rope, the steel wire rope is provided with the magnetic field, and on the other hand, the magnetic conductivity of the steel wire rope is far greater than that of air. The steel wire rope can form a magnetic path in the steel wire rope under the encouragement of j of an internal and external magnetic field, if the steel wire rope has no defect, the magnetic flux in the steel wire rope can be parallel to the axial direction of the steel wire rope and cannot be leaked out of the surface of the steel wire rope, and if the steel wire rope has the defect in the outer part and the inner part, the air permeability is low, so that part of the magnetic flux can be leaked out of the defect position to form a magnetic leakage. The existence of the internal and external defects of the steel wire rope is detected by capturing the leakage magnetic field on the surface of the steel wire rope by using a magnetic sensor.

According to the detection principle of the steel wire rope under unsaturated magnetic excitation, the section designs a steel wire rope nondestructive detection system under unsaturated magnetic excitation. The whole system comprises: the device comprises a wire rope surface leakage magnetic field acquisition module encouraged by unsaturated magnetism j, an upper computer module and a 4G wireless transmission module. And the wire rope surface leakage magnetic field acquisition module under unsaturated magnetic excitation is responsible for acquiring wire rope surface leakage magnetic field data and transmitting the wire rope surface leakage magnetic field data to an upper computer through a serial port. And the upper computer is responsible for processing and analyzing the acquired data to obtain the defect information of the steel wire rope. The 4G wireless transmission module is responsible for sending the steel wire rope defect information obtained by the processing of the upper computer to the network server, and can subscribe the steel wire rope defect information on the server through the mobile terminal or the remote PC terminal so as to realize the function of remote monitoring.

The wire rope leakage magnetic field acquisition module includes: the device comprises a non-saturated magnetic excitation unit, a sensor array, a pulse generation and acquisition unit, a main control unit and a leakage magnetic field data storage unit.

The unsaturated magnetic excitation unit is responsible for loading an unsaturated magnetic excitation source on the steel wire rope, and ferro-lithopone is adopted; the permanent magnets are made, and a plurality of strip-shaped permanent magnets are uniformly distributed in the circumferential direction of the steel wire rope so as to ensure that the encouragement magnetic field of j of the steel wire rope is uniform; the sensor array is responsible for capturing and converting a magnetic field signal on the surface of the steel wire rope into a voltage signal,

using a high-precision magnetic sensor as a magnetic field acquisition probe, and uniformly and densely distributing 18 high-precision magnetic sensors in the circumferential direction of the steel wire rope so as to enable the acquired magnetic field to be distributed in the circumferential direction of the steel wire rope; an encoder is used as a pulse generator to ensure equal space sampling; the main control unit is responsible for carrying out serial conversion on the acquired magnetic field information and storing the magnetic field information in the storage unit, and the main control unit and the data storage unit comprise an AD interface signal conditioning circuit, a data storage unit and a control chip, wherein the data storage adopts an SD card, and the control chip uses an STM32F407 chip.

The beneficial effects are that: the problems that the nondestructive testing instrument is inconvenient to assemble and disassemble, complex in structure, high in requirement on manufacturing process, heavy in device, inconvenient to use and low in sensitivity are solved.

Drawings

Fig. 1 is a schematic diagram of the principle of the present invention.

Detailed Description

The invention is described in detail below with reference to specific embodiments.

The specific implementation mode is as follows: the invention adopts the unsaturated magnetic excitation detection principle, and the steel wire rope is formed by winding high-quality carbon steel wires and has good magnetic conductivity. In the air, the magnetic field intensity outside the bar magnet is circularly and symmetrically distributed by taking a two-pole connecting line as a center. The permeability is more than 1000 times greater than that of air, so that when a steel wire rope section is placed in the air, the external magnetic field of the steel wire rope section is changed. The steel wire rope detection device comprises a steel wire rope, a plurality of permanent magnets, a magnetic field and a controller, wherein the permanent magnets are uniformly straightened along the circumferential direction of the steel wire rope as shown in a steel wire rope detection technical schematic diagram under unsaturated magnetic excitation, the permanent magnets can form a magnetic field around the steel wire rope, the magnetic field can magnetize the steel wire rope, the steel wire rope is provided with the magnetic field, and on the other hand, the magnetic conductivity of the steel wire rope is far greater than that of air. The steel wire rope can form a magnetic path in the steel wire rope under the encouragement of j of an internal and external magnetic field, if the steel wire rope has no defect, the magnetic flux in the steel wire rope can be parallel to the axial direction of the steel wire rope and cannot be leaked out of the surface of the steel wire rope, and if the steel wire rope has the defect in the outer part and the inner part, the air permeability is low, so that part of the magnetic flux can be leaked out of the defect position to form a magnetic leakage. The existence of the internal and external defects of the steel wire rope is detected by capturing the leakage magnetic field on the surface of the steel wire rope by using a magnetic sensor.

According to the detection principle of the steel wire rope under unsaturated magnetic excitation, the section designs a steel wire rope nondestructive detection system under unsaturated magnetic excitation. The whole system comprises: the device comprises a wire rope surface leakage magnetic field acquisition module encouraged by unsaturated magnetism j, an upper computer module and a 4G wireless transmission module. And the wire rope surface leakage magnetic field acquisition module under unsaturated magnetic excitation is responsible for acquiring wire rope surface leakage magnetic field data and transmitting the wire rope surface leakage magnetic field data to an upper computer through a serial port. And the upper computer is responsible for processing and analyzing the acquired data to obtain the defect information of the steel wire rope. The 4G wireless transmission module is responsible for sending the steel wire rope defect information obtained by the processing of the upper computer to the network server, and can subscribe the steel wire rope defect information on the server through the mobile terminal or the remote PC terminal so as to realize the function of remote monitoring.

The wire rope leakage magnetic field acquisition module includes: the device comprises a non-saturated magnetic excitation unit, a sensor array, a pulse generation and acquisition unit, a main control unit and a leakage magnetic field data storage unit.

The unsaturated magnetic excitation unit is responsible for loading an unsaturated magnetic excitation source on the steel wire rope, and ferro-lithopone is adopted; the permanent magnets are made, and a plurality of strip-shaped permanent magnets are uniformly distributed in the circumferential direction of the steel wire rope so as to ensure that the encouragement magnetic field of j of the steel wire rope is uniform; the sensor array is responsible for capturing and converting a magnetic field signal on the surface of the steel wire rope into a voltage signal,

using a high-precision magnetic sensor as a magnetic field acquisition probe, and uniformly and densely distributing 18 high-precision magnetic sensors in the circumferential direction of the steel wire rope so as to enable the acquired magnetic field to be distributed in the circumferential direction of the steel wire rope; an encoder is used as a pulse generator to ensure equal space sampling; the main control unit is responsible for carrying out serial conversion on the acquired magnetic field information and storing the magnetic field information in the storage unit, and the main control unit and the data storage unit comprise an AD interface signal conditioning circuit, a data storage unit and a control chip, wherein the data storage adopts an SD card, and the control chip uses an STM32F407 chip.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.