阅读说明：本技术 一种煤矿地下水库防隔水煤岩柱厚度无损探测技术试验装置 (Coal mine underground reservoir water-proof coal rock pillar thickness nondestructive detection technology test device ) 是由 汪北方 赵函巍 张晶 蒋嘉祺 于 2021-10-21 设计创作，主要内容包括：一种煤矿地下水库防隔水煤岩柱厚度无损智能探测的实验装置,用于煤矿地下水库隔水煤岩柱坝体损伤智能检测试验领域。实验装置包括探测系统和数据处理系统,探测系统由探头、数据传输线、数据接收器组成,智能分析系统由计算机、基于BP神经网络模型的应用软件组成,探测系统根据计算机发出的指令,产生高压发射电路,为超声波激励电路提供稳定的高压直流电源,探头所得的数据信号通过数据传输线传输到计算机接收系统,计算机设定的基于BP神经网络模型的应用软件对所得的声波数据信号进行自动智能识别,对缺陷进行定位和分析得出尺寸大小,该装置克服了依赖人工识别判定探测结果的偏差问题,降低了技术人员的工作量并提升了探测结果的精准度。(An experimental device for intelligent nondestructive detection of thickness of a waterproof coal rock pillar of a coal mine underground reservoir is used for the intelligent detection test field of damage of a dam body of the waterproof coal rock pillar of the coal mine underground reservoir. The experimental device comprises a detection system and a data processing system, wherein the detection system comprises a probe, a data transmission line and a data receiver, an intelligent analysis system comprises a computer and application software based on a BP (back propagation) neural network model, the detection system generates a high-voltage transmitting circuit according to an instruction sent by the computer and provides a stable high-voltage direct-current power supply for an ultrasonic excitation circuit, a data signal obtained by the probe is transmitted to a computer receiving system through the data transmission line, the application software set by the computer and based on the BP neural network model carries out automatic intelligent identification on the obtained sound wave data signal, the defect is positioned and analyzed to obtain the size of the defect, the device overcomes the problem of deviation of the detection result determined by depending on manual identification, the workload of technicians is reduced, and the accuracy of the detection result is improved.)

1. The utility model provides a colliery underground reservoir prevents water proof coal petrography post thickness nondestructive test technical test device which characterized in that: the test device comprises a detection system and an intelligent analysis system; the detection system mainly comprises a probe (1), a data transmission line (10) and a data collector (11); the probe (1) mainly comprises a delay block (2), a protective film (3), a shell (4), a piezoelectric wafer (5), a damping absorption block (6), a lug plate (7), a conductive rod (8) and a joint (9), wherein the front end part in the probe (2) contains the delay block (2), the rear part is provided with the protective film (4) and the piezoelectric wafer (5), the protective film (4) is positioned on the surface of the piezoelectric wafer (5), the damping absorption block (6) is arranged at the back part of the piezoelectric wafer (5), the inside is connected with various components through wires and finally connected to the lug plate (7), and the damping absorption block is transmitted to the joint (9) through the conductive rod (8); the data acquisition unit (11) is connected with the probe (2) through a data transmission line (10); the data acquisition unit (11) mainly comprises a liquid crystal display screen (12), a function key (13), a transmission joint (14) and a USB port (15); the liquid crystal display screen (12) and the function keys (13) are positioned in front of the data collector (11), the transmission joint (14) is positioned on the left side of the data collector (11) and connected with the probe (2) through a data transmission line (10), and the USB port (15) is positioned above the transmission joint (14); the intelligent analysis system is composed of a computer (16) and application software (17) based on a BP neural network model.

2. The coal mine underground reservoir water and coal preventing and isolating pillar thickness nondestructive detection technology test device of claim 1 is characterized in that: the size of the probes (1) is phi 100mm multiplied by 120mm, the number of the probes (1) is two, and the shell is mainly made of metal materials.

3. The coal mine underground reservoir water and coal preventing and isolating pillar thickness nondestructive detection technology test device of claim 1 is characterized in that: the piezoelectric wafer (5) is made of PZT piezoelectric ceramic material.

4. The coal mine underground reservoir water and coal preventing and isolating pillar thickness nondestructive detection technology test device of claim 1 is characterized in that: the thickness of the protective film (4) is 0.05 mm-0.5 mm, and the protective film is made of a synthetic fluorine material.

5. The coal mine underground reservoir water and coal preventing and isolating pillar thickness nondestructive detection technology test device of claim 1 is characterized in that: the damping absorption block (6) is made of tungsten powder and epoxy resin composite materials.

Technical Field

The invention relates to a nondestructive detection technology test device, which is used for the field of intelligent detection tests for damages of dam bodies of water-insulating coal rock pillars of coal mine underground reservoirs.

Background

The reservoir of the coal mine goaf is different from a water storage function reservoir on the common ground surface, is positioned in a novel hydraulic engineering which is formed by combined action of coal rocks and other rock strata and is dozens of meters or even hundreds of meters underground, and because the reservoir is positioned underground, uncertain dangers such as complex operation environment exist, but the purpose and the use effect of the construction are the same as the major diameter of the common ground reservoir. The goaf resembles a common underground reservoir. The coal mining operation is complex and uncertain, underground complex operation environment and vibration disturbance caused in the mining process are factors affecting the safety and stability operation of the underground reservoir to be not negligible, vibration loads generated by multiple factors threaten the safety and stability of the water reservoir in the goaf, and if an accident occurs due to instability of the reservoir dam, the consequence is difficult to estimate. Therefore, the damage degree of the reservoir dam body under the complex operation condition is analyzed and researched, the structural stability is the key for ensuring the safe operation of the underground reservoir, meanwhile, the intelligent detection for preventing the damage of the waterproof coal rock pillar of the underground reservoir is an important step for preventing the water damage, the research on the aspect in China is relatively few at present, certain theoretical basis and system exist, and more accurate, convenient and fast nondestructive intelligent detection technology and equipment are lacked.

Therefore, the device for researching the nondestructive detection technology for the thickness of the waterproof coal rock pillar of the coal mine underground reservoir can help people to accurately fit with the actual damage condition of the dam body, and plays an important role in preventing underground water damage.

Disclosure of Invention

The invention aims to provide a coal mine underground reservoir water-proof coal rock pillar thickness nondestructive detection technology test device which can realize intelligent nondestructive detection of damage, cracks and the like of a dam body of a coal mine underground reservoir, overcomes the defect that the damage and the internal cracks of the dam body of the coal mine underground reservoir cannot be detected in real time on site, avoids inaccurate errors caused by similar material simulation, and improves the accuracy and precision of obtained results. Moreover, the water-proof coal rock column nondestructive intelligent detection takes longer time and larger result deviation required by the judgment of the result of the worker into consideration, so that the artificial intelligence based on the neural network is adopted for carrying out discriminant analysis and obtaining the result, the labor amount of the worker is reduced, and the scientificity and the accuracy of the detection result are improved.

In order to achieve the purpose, the invention adopts the following technical scheme: a coal mine underground reservoir water-proof coal rock pillar thickness nondestructive detection technical test device mainly comprises a detection system and an intelligent analysis system, wherein the detection system comprises a probe, a data transmission line and a data receiver; the probe mainly comprises a delay block, a protective film, a shell, a piezoelectric wafer, a damping absorption block, a lug plate, a conductive rod and a joint; the front end part in the probe contains a delay block, the rear part of the probe is provided with a protective film and a piezoelectric wafer, and the protective film is positioned on the surface of the piezoelectric wafer; the back of the piezoelectric wafer is provided with a damping absorption block, the inside of the piezoelectric wafer is connected with each component through a lead and finally connected to a lug, and the damping absorption block is transmitted to a connector through a conductive rod; the data acquisition unit is connected with the probe through a data transmission line; the data acquisition unit mainly comprises a liquid crystal display screen, a function key, a transmission joint and a USB port, wherein the liquid crystal display screen and the function key are positioned at the front part of the data acquisition unit; the intelligent analysis system consists of a computer and application software based on a BP neural network model.

Preferably, the size of the probe is phi 100mm multiplied by 120mm, the number of the probes is two, and the shell is mainly made of metal materials.

Preferably, the piezoelectric wafer is made of PZT piezoelectric ceramic material.

Preferably, the thickness of the protective film is 0.05 mm-0.5 mm, and the protective film is made of a synthetic fluorine material.

Preferably, the damping absorption block is made of a tungsten powder and epoxy resin composite material.

The invention has the following remarkable effects: the device utilizes the piezoelectric wafer to generate and receive ultrasonic waves, and utilizes the absorption block to absorb the sound waves emitted by the wafer to the back and suppress clutter so as to ensure the requirements of undistorted waveform and resolution ratio; the ultrasonic probe and the computer can be used for realizing the field real-time detection of the waterproof coal rock pillar of the coal mine underground reservoir, the damage condition of the dam body is detected in a more accurate fitting manner, the problems of detection result identification and judgment and deviation judgment within a certain range by professional technicians are solved, the workload of the technicians is reduced, and the precision of the detection result is improved.

Drawings

FIG. 1 is a schematic structural diagram of a coal mine underground reservoir water and coal preventing and isolating pillar thickness nondestructive detection technology testing device.

FIG. 2 is a schematic structural view of a probe of a testing device for the thickness nondestructive detection technology of a waterproof and waterproof coal rock pillar of a coal mine underground reservoir.

FIG. 3 is a schematic structural diagram of a data acquisition unit of a coal mine underground reservoir water-proof coal rock pillar thickness nondestructive detection technology testing device.

In the figure: 1-a probe; 2-a delay block; 3-a housing; 4-protective film; 5-a piezoelectric wafer; 6-damping absorption block; 7-a lug plate; 8-a conductive rod; 9-a linker; 10-a data transmission line; 11-a data collector; 12-a liquid crystal display screen; 13-function key; 14-a transmission joint; 15-USB port; 16-a computer; 17-application software.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to these examples.

In the description of the present invention, it should be noted that terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in figures 1-3, the coal mine underground reservoir water and coal pillar thickness prevention nondestructive detection technology test device mainly comprises a detection system and an intelligent analysis system, and is mainly used for realizing the water and coal pillar thickness prevention nondestructive intelligent detection of cracks and damage conditions in the water and coal pillar.

The detection system consists of two probes 1, a data transmission line 10 and a data receiver 11.

Further, the probe 1 mainly comprises a delay block 2, a protective film 3, a shell 4, a piezoelectric wafer 5, a damping absorption block 6, a lug 7, a conductive rod 8 and a joint 9; the size of the probe 1 is phi 100mm multiplied by 120mm, and the shell is mainly made of metal materials. The front end part of the interior of the probe 2 contains a delay block 2, the rear part of the interior of the probe is provided with a protective film 4 and a piezoelectric wafer 5, and the piezoelectric wafer 5 is made of PZT piezoelectric ceramic materials and is a core component of the whole probe device and used for generating and receiving sound waves; the protective film 4 is positioned on the surface of the piezoelectric wafer 5, is made of synthetic fluorine material, has a thickness of 0.05 mm-0.5 mm, and is used for protecting the piezoelectric wafer 5 and reducing other loss influences; the back of the piezoelectric wafer 5 is provided with a damping absorption block 6 which is made of tungsten powder and epoxy resin composite materials and is used for absorbing clutter, inhibiting sound waves and stabilizing waveforms; the internal parts are connected with each other through wires, and finally connected to a lug 7 and transmitted to a joint 9 through a conductive rod 8; the data acquisition unit 11 is connected with the probe 2 through a data transmission line 10.

Further, the data collector 11 mainly includes a liquid crystal display 12, a function key 13, a transmission connector 14 connected with the probe and a USB port 15 for transmitting data; the size of the data acquisition unit 11 is 240mm multiplied by 160mm multiplied by 50mm, and the shell is a plastic shell; the USB port can be used for being directly connected with the computer 16 to transmit data in real time, and can also store the data into the U disk; the function keys 13 are used for controlling the regulation and control command, and detecting, storing and transmitting data.

Further, the intelligent analysis system is composed of a computer 16 and application software 17 based on a BP neural network model.

Further, the core application of the computer 16 is application software 17 based on a BP neural network, and is used for receiving the detected and collected information, performing automatic intelligent information processing, and analyzing to obtain the internal damage and fracture conditions of the waterproof coal-rock pillar.

The working principle of the nondestructive intelligent detection device for the thickness of the waterproof and waterproof coal and rock pillar is briefly described with reference to fig. 1 to 3 and the structural features.

Firstly, a three-dimensional model is built for a region to be measured, a coordinate system is built, exclusive coordinate positioning is built for each point of the region to be measured, a probe is placed at a point to be measured, then a data acquisition unit 10 sends out a detection command, a probe 2 receives a flaw detection pulse, a core component piezoelectric wafer 5 generates ultrasonic waves after receiving the pulse and transmits the ultrasonic waves to a measured object, a delay block 3 eliminates the influence of a blind zone to a certain extent, the piezoelectric wafer 5 receives the returned ultrasonic waves, meanwhile, a damping absorption block 6 absorbs the ultrasonic waves at the back of the piezoelectric wafer 5, and the phenomenon that the ultrasonic waves are reflected back and forth repeatedly to avoid causing interference on the transmission and the reception of the ultrasonic waves by the piezoelectric wafer 5 is avoided. The pulse is transmitted inside through a wire, the lug plate 7 receives and is connected with a wire rod 8 and further transmitted to an end connector 9 of the probe, the signal is transmitted into a data acquisition unit 11 through a data transmission line 10, and the data is transmitted and displayed on a liquid crystal display screen 12 in real time. The acquired data can be connected with a computer 16 through a USB port 15, data processing and analysis are carried out through application software 17, the data can be automatically processed and analyzed in real time through a specific algorithm of the waterproof and waterproof coal-rock column waveform information based on the BP neural network, and the condition that the thickness of the waterproof and waterproof coal-rock column is not damaged and intelligently detected to be cracked or damaged is achieved.

While the foregoing is directed to the preferred embodiment of the present invention, which is illustrative and not limiting, it will be appreciated by those skilled in the art that various changes may be made in the embodiment without departing from the spirit and scope of the invention.