阅读说明：本技术 一种钢丝绳损伤检测装置及方法 (Steel wire rope damage detection device and method ) 是由 李兆明 李彦清 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种钢丝绳损伤检测装置及方法,它解决了现有技术中对微小缺陷反应不灵敏、检测精度较低的问题,具有对微小缺陷反应灵敏、数据处理量小的效果；其技术方案为：包括传感器壳体,所述传感器壳体两端分别安装磁化装置,所述磁化装置具有用于钢丝绳穿过的通孔,使传感器壳体、磁化装置与钢丝绳组成磁通回路；所述传感器壳体内部设有两组用于收集钢丝绳表面漏磁场的聚磁装置,所述聚磁装置通过尼龙导套与传感器壳体内壁固定；聚磁装置之间固定有用于检测漏磁场的检测电路板。(The invention discloses a steel wire rope damage detection device and a steel wire rope damage detection method, which solve the problems of insensitive response to tiny defects and low detection precision in the prior art and have the effects of sensitive response to tiny defects and small data processing capacity; the technical scheme is as follows: the sensor comprises a sensor shell, wherein magnetizing devices are respectively arranged at two ends of the sensor shell, and each magnetizing device is provided with a through hole for a steel wire rope to pass through, so that the sensor shell, the magnetizing devices and the steel wire rope form a magnetic flux loop; two groups of magnetism gathering devices for collecting the magnetic leakage field on the surface of the steel wire rope are arranged in the sensor shell, and the magnetism gathering devices are fixed with the inner wall of the sensor shell through nylon guide sleeves; and a detection circuit board for detecting the leakage magnetic field is fixed between the magnetic gathering devices.)

1. A steel wire rope damage detection device is characterized by comprising a sensor shell, wherein magnetizing devices are respectively arranged at two ends of the sensor shell, and each magnetizing device is provided with a through hole for a steel wire rope to pass through, so that the sensor shell, the magnetizing devices and the steel wire rope form a magnetic flux loop;

two groups of magnetism gathering devices for collecting the magnetic leakage field on the surface of the steel wire rope are arranged in the sensor shell, and the magnetism gathering devices are fixed with the inner wall of the sensor shell through nylon guide sleeves; and a detection circuit board for detecting the leakage magnetic field is fixed between the magnetic gathering devices.

2. The apparatus as claimed in claim 1, wherein the magnetic collecting means comprises a magnetic collecting ring having a plurality of magnetic conductive bosses on a side thereof adjacent to the detection circuit board, so that the magnetic flux is collected at the magnetic conductive bosses.

3. The apparatus as claimed in claim 2, wherein the magnetic focusing ring is fixed in a groove on a side surface of the nylon guide sleeve, and the nylon guide sleeve is clamped in a groove on an inner wall of the sensor housing.

4. The steel wire rope damage detection device according to claim 2, wherein the detection circuit board is provided with a plurality of Hall elements, and detection signals of the Hall elements are connected with the signal processing device sequentially through the zeroing amplification module, the addition amplification module and the A/D conversion module.

5. The device for detecting damage to the steel wire rope according to claim 4, wherein the hall element is mounted at a position corresponding to the position of the magnetic boss.

6. The apparatus as claimed in claim 1, wherein the sensor housing comprises a first housing and a second housing that snap together to form a closed structure, and the magnetizing means comprises a first permanent magnet and a second permanent magnet that are symmetrically distributed.

7. The device for detecting damage to a steel wire rope according to claim 6, wherein the first permanent magnet and the second permanent magnet are radial magnetized tile-shaped permanent magnets, and the magnetizing directions of the permanent magnets at two ends of the sensor housing are different.

8. The device for detecting damage to the steel wire rope according to claim 6, wherein the first housing and the second housing each have a cavity for mounting the magnetism collecting device therein, and the ends of the first housing and the second housing have a predetermined thickness.

9. The apparatus of claim 1, wherein the sensor housing is made of a magnetically conductive material.

10. A steel wire rope damage detection method, characterized in that, by adopting the detection device as claimed in any one of claims 1 to 9, when in operation, a steel wire rope to be detected passes through the middle gaps of the sensor shell, the nylon guide sleeve, the detection circuit board and the magnetism gathering device, the magnetization device magnetizes the steel wire rope to be detected to saturation along the axial direction, so that a complete magnetic loop is formed among the sensor shell, the magnetization device and the steel wire rope to be detected;

when a defect exists in the steel wire rope to be detected, a leakage magnetic field is detected by the Hall element through the collection of the magnetism gathering device, corresponding Hall potential change is generated in the Hall element, the analog voltage value is processed by the zeroing amplification module, the addition amplification module and the A/D conversion module and then is sent to the signal processing module, the signal processing device processes an obtained digital quantity signal and extracts characteristic quantity, and the damage degree of the steel wire rope is obtained through contrastive analysis with a standard value.

Technical Field

The invention relates to the technical field of steel wire rope detection, in particular to a steel wire rope damage detection device and method.

Background

With the continuous development of society, the application of steel wire ropes is wider and wider, and meanwhile, the safety of the steel wire ropes is concerned by people more and more, so that the damage condition of the steel wire ropes needs to be detected on line. The inventor finds that the conventional steel wire rope detection device still has the problems of low precision and insensitive response to tiny defects, so that the detection omission risks. In addition, in order to increase the detection precision, a mode of increasing a detection channel is adopted by a plurality of instruments, which increases the difficulty of signal processing to a certain extent and reduces the resolution of the instruments.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a steel wire rope damage detection device and method, which have the effects of sensitive response to tiny defects and small data processing amount.

The invention adopts the following technical scheme:

a steel wire rope damage detection device comprises a sensor shell, wherein magnetizing devices are respectively installed at two ends of the sensor shell, and each magnetizing device is provided with a through hole for a steel wire rope to pass through, so that the sensor shell, the magnetizing devices and the steel wire rope form a magnetic flux loop;

two groups of magnetism gathering devices for collecting the magnetic leakage field on the surface of the steel wire rope are arranged in the sensor shell, and the magnetism gathering devices are fixed with the inner wall of the sensor shell through nylon guide sleeves; and a detection circuit board for detecting the leakage magnetic field is fixed between the magnetic gathering devices.

Furthermore, the magnetism gathering device comprises a magnetism gathering ring, and one side of the magnetism gathering ring, which is close to the detection circuit board, is provided with a plurality of magnetic conduction bosses, so that magnetic flux gathers at the positions of the magnetic conduction bosses.

Furthermore, the magnet gathering ring is fixed in a groove on the side surface of the nylon guide sleeve, and the nylon guide sleeve is clamped in the groove on the inner wall of the sensor shell.

Furthermore, the detection circuit board is provided with a plurality of Hall elements, and detection signals of the Hall elements are connected with the signal processing device through the zeroing amplification module, the addition amplification module and the A/D conversion module in sequence.

Furthermore, the installation position of the Hall element corresponds to the position of the magnetic conduction boss.

Further, the sensor housing comprises a first housing and a second housing which are buckled together to form a closed structure, and the magnetizing device comprises a first permanent magnet and a second permanent magnet which are symmetrically distributed.

Furthermore, the first permanent magnet and the second permanent magnet are tile-shaped permanent magnets magnetized in the radial direction, and the magnetizing directions of the permanent magnets at two ends of the sensor shell are different.

Further, the first shell and the second shell are respectively provided with a cavity for mounting the magnetism gathering device, and the end parts of the first shell and the second shell have set thicknesses.

Further, the sensor shell is made of a magnetic conductive material.

A steel wire rope damage detection method adopts the detection device, when the detection device works, a steel wire rope to be detected passes through a sensor shell, a nylon guide sleeve, a detection circuit board and a middle gap of a magnetism gathering device, and a magnetization device magnetizes the steel wire rope to be detected to be saturated along the axial direction, so that a complete magnetic loop is formed among the sensor shell, the magnetization device and the steel wire rope to be detected;

when a defect exists in the steel wire rope to be detected, a leakage magnetic field is detected by the Hall element through the collection of the magnetism gathering device, corresponding Hall potential change is generated in the Hall element, the analog voltage value is processed by the zeroing amplification module, the addition amplification module and the A/D conversion module and then is sent to the signal processing module, the signal processing device processes an obtained digital quantity signal and extracts characteristic quantity, and the damage degree of the steel wire rope is obtained through contrastive analysis with a standard value.

Compared with the prior art, the invention has the beneficial effects that:

(1) the method adopts the Hall element to detect the magnetic leakage flux of the steel wire rope to judge the existence condition and the characteristics of the defects, and obtains the damage condition of the steel wire rope by analyzing the detection signal, thereby realizing the quantification of the internal and external defects of the steel wire rope;

(2) the magnetic flux leakage field on the surface of the steel wire rope is collected by the magnetic flux gathering ring, so that the identification capability of the magnetic flux leakage detection device on tiny defects is improved, and the signal-to-noise ratio of detection signals is increased; the magnetism gathering ring has the functions of homogenizing the magnetic field and eliminating the magnetic leakage field among the strands, and the detection result can be optimized on hardware; the number of Hall elements used by the magnetic gathering ring is greatly reduced, so that the magnitude of signal real-time data processing capacity is reduced, and the resolution of the system is improved;

(3) the sensor shell, the permanent magnet, the nylon guide sleeve, the magnetic gathering ring and the detection circuit board are all of split structures, the structure is convenient to disassemble and adjust the sensor, and convenience in field use is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of an internal structure according to a first embodiment of the present invention;

fig. 3 is a schematic view of a magnetic gathering half ring structure according to a first embodiment of the invention;

FIG. 4 is a block diagram of a signal processing circuit according to a first embodiment of the present invention;

FIG. 5 is a circuit diagram of a zeroing amplifying module according to a first embodiment of the present invention;

FIG. 6 is a circuit diagram of an add amplifier module according to a first embodiment of the present invention;

FIG. 7 is a circuit diagram of an A/D conversion module according to a first embodiment of the present invention;

the magnetic detection device comprises a Hall element 1, a Hall element 2, a magnetism gathering semi-ring 3, a magnetic conduction boss 4, a groove 5, a detection circuit board 6, a second shell 7, a second permanent magnet 8, a first permanent magnet 9, a first shell 10, a through hole 11 and a nylon guide sleeve.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.

As introduced in the background art, the prior art has the defects of insensitive response to tiny defects and low detection precision, and the invention provides a device and a method for detecting damage of a steel wire rope in order to solve the technical problems.