Array type acoustic emission positioning device for monitoring soil deformation in real time

Abstract

The utility model discloses an array type acoustic emission positioning device for monitoring soil deformation in real time, which belongs to the technical field of underground engineering construction and geological disaster monitoring and comprises an acoustic emission signal integrated processing box and a hollow penetration rod. An acoustic emission signal processing mechanism and a battery pack are integrated in the acoustic emission signal integrated processing box, and the acoustic emission signal processing mechanism collects and processes acoustic emission signals and gives feedback information; the penetration rod is of a hollow structure, the top end of the penetration rod is connected with the acoustic emission signal integrated processing box in a sealed mode, the lower portion of the penetration rod is composed of a plurality of sensor monomer assemblies distributed in an array mode, and the sensor monomer assemblies are electrically connected with the acoustic emission signal processing mechanism through signal transmission cables. According to the utility model, the acoustic emission source positioning technology is adopted to meet the requirements of slope stability monitoring, underground engineering construction disturbance monitoring and the like, and the system has the advantages of easy installation, strong real-time performance and high monitoring precision.

Description

Technical Field

[0001] The utility model relates to the technical field of underground engineering construction and geological disaster monitoring, in particular to an array-type acoustic emission positioning device for real-time monitoring of soil deformation. Background Art

[0002] In technical fields such as underground engineering construction and geological disaster monitoring, the stability of construction slopes and the safety of foundation projects are crucial considerations. Traditional soil disturbance monitoring methods often rely on discrete sensor networks or visual monitoring systems, which have some limitations and challenges. For example, traditional monitoring methods may not be able to provide real-time or high-precision disturbance detection, especially in complex terrain or engineering environments.

[0003] Acoustic emission source location technology utilizes the propagation characteristics of sound waves in solid materials. By accurately measuring the propagation time and intensity of sound waves, it can locate and monitor disturbance sources inside the soil in real time. This technology can not only detect geological activities or potential landslide risks in slope monitoring during construction, but also monitor foundation disturbances in real time during underground engineering construction, thereby improving the safety and efficiency of engineering construction.

[0004] However, most soil disturbance monitoring systems currently on the market have limitations, such as insufficient monitoring accuracy, complex installation, and low real-time performance. Therefore, a new type of monitoring device is needed that can overcome the limitations of traditional methods and provide a more accurate, efficient, and reliable soil disturbance monitoring solution. Utility Model Content

[0005] Technical problems solved: In response to the technical problems existing in the prior art, the utility model provides an array-type acoustic emission positioning device for real-time monitoring of soil deformation. It adopts acoustic emission source positioning technology to meet the needs of slope stability monitoring and foundation engineering safety monitoring, and has the advantages of easy installation, strong real-time performance and high monitoring accuracy.

[0006] Technical solution: The utility model discloses an array-type acoustic emission positioning device for real-time monitoring of soil deformation, which includes an acoustic emission signal integration processing box and a hollow penetration rod;

[0007] The acoustic emission signal integrated processing box is integrated with an acoustic emission signal processing mechanism and a battery pack; the acoustic emission signal processing mechanism collects and processes the acoustic emission signal and provides feedback information;

[0008] The penetration rod has a hollow structure, and the top of the penetration rod is sealedly connected to the acoustic emission signal integrated processing box through a connecting part; the lower part of the penetration rod is composed of multiple sensor monomer components distributed in an array, and the sensor monomer components are electrically connected to the acoustic emission signal processing mechanism through a signal transmission cable.

[0009] Preferably, at least five sensor monomer assemblies are provided at the lower end of the penetration rod, and the sensor monomer assemblies are arranged linearly along the penetration rod.

[0010] Preferably, the sensor unit assembly includes a connecting sleeve and an acoustic emission signal sensor disposed in the connecting sleeve;

[0011] A noise reduction sealing ring is provided between two adjacent connecting sleeves, and the noise reduction sealing ring is fixedly connected to the corresponding connecting sleeve.

[0012] Preferably, the connecting sleeve is fixedly connected to the noise reduction sealing ring through a connecting threaded area.

[0013] Preferably, a battery compartment for disassembly and installation of the battery pack is provided in the acoustic emission signal integrated processing box, and a battery compartment door is provided corresponding to the opening of the battery compartment.

[0014] Preferably, a rain cap with an arc-shaped drainage structure is provided on the top of the acoustic emission signal integrated processing box.

[0015] Preferably, the acoustic emission signal processing mechanism is embedded with a signal processing module and a positioning module. The signal processing module receives and processes the acoustic emission signal transmitted by the acoustic emission signal sensor; the positioning module receives the acoustic emission signal source generated in the soil disturbance area for positioning.

[0016] Preferably, the connection portion is a threaded connection structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model adopts acoustic emission source positioning technology to meet the needs of slope stability monitoring and foundation engineering safety monitoring, and has the advantages of easy installation, strong real-time performance and high monitoring accuracy;

[0019] 2. The acoustic emission sensors are arranged linearly along the rod wall. When the rod is penetrating the soil slope, the acoustic emission sensors can be pre-buried in the soil at a specified position.

[0020] 3. The acoustic emission signal integrated processing box and the penetration rod adopt a separate structure, and the penetration rod can be disassembled and stored in the acoustic emission signal integrated processing box;

[0021] 4. The acoustic emission signal integrated processing box is equipped with a battery compartment, which allows the battery pack to be easily replaced according to power requirements;

[0022] 5. The penetration rod is assembled from multiple connecting sleeves. The components are connected by connecting threaded areas. Noise-reduction sealing rings are installed between adjacent connecting sleeves. The noise-reduction sealing rings can block the acoustic emission signals and prevent the acoustic emission signals from propagating along the penetration rod wall and affecting the source positioning calculation.

[0023] 6. During the soil slope monitoring process, the signal processing module of the device collects acoustic emission signals. Through the acoustic emission signals, the soil disturbance area in the invisible underground area can be monitored and feedback can be provided, and the feedback area can be processed in time. The device can monitor the soil in the invisible position below the surface, and is widely used in the fields of slope monitoring and high-pressure rotary jet pile work monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an axial structural cross-sectional view of the array-type acoustic emission positioning device of the present utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure at center A;

[0026] Figure 3 for Figure 1 Schematic diagram of the layout of the medium array acoustic emission positioning device.

[0027] Figure numerals: 100, array-type acoustic emission positioning device; 1, acoustic emission signal integrated processing box; 2, penetration rod; 3, acoustic emission signal processing mechanism; 4, battery compartment; 5, battery pack; 6, battery compartment door; 7, rain cap; 8, connection part; 9, signal transmission cable; 10, sensor unit assembly; 11, connecting sleeve; 12, acoustic emission signal sensor; 13, noise reduction sealing ring; 14, connection thread area; 15, soil slope; 16, soil disturbance area. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following Figures 1-3 The technical solutions of the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0029] Example: Figures 1-3As shown, the present invention provides an array-type acoustic emission positioning device for real-time monitoring of soil deformation. The array-type acoustic emission positioning device 100 includes an acoustic emission signal integration processing box 1 and a penetration rod 2. The acoustic emission signal integration processing box 1 is integrated with an acoustic emission signal processing mechanism 3 and a battery pack 5. The acoustic emission signal processing mechanism 3 collects and processes the acoustic emission signals and provides feedback information. More specifically, the acoustic emission signal processing mechanism 3 is embedded with a signal processing module and a positioning module. The signal processing module receives and processes the acoustic emission signals transmitted by the acoustic emission signal sensor 12, and the positioning module locates the source of the acoustic emission signals generated by the soil disturbance area 16 according to the acoustic emission source positioning algorithm, thereby accurately obtaining the specific location of the soil disturbance area 16 at the contact surface between the soil slope 15 and the foundation.

[0030] like Figure 2 As shown, the penetration rod 2 has a hollow structure. The top end of the penetration rod 2 is sealedly connected to the acoustic emission signal integrated processing box 1 via a connector 8. The connector 8 can be a threaded connection structure to achieve a fixed connection between the penetration rod 2 and the lower end of the acoustic emission signal integrated processing box 1. The lower portion of the penetration rod 2 is composed of a plurality of sensor units 10 distributed in an array. The sensor units 10 are electrically connected to the acoustic emission signal processing mechanism 3 via a signal transmission cable 9. The penetration rod 2 can be made of steel material with good corrosion resistance. It can avoid relative deformation during the process of penetrating the soil slope 15. In addition, it can be more durable in certain environmental conditions, such as humid or chemical-containing underground environments.

[0031] In a preferred embodiment, if Figure 1 As shown, at least five sensor monomer assemblies 10 are provided at the lower end of the penetration rod 2, and the sensor monomer assemblies 10 are arranged linearly along the penetration rod 2; in this embodiment, the sensor monomer assemblies 10 adopt a modular design, and an appropriate number of sensor monomer assemblies 10 can be selected according to needs, thereby extending the length of the penetration rod 2 to meet the detection needs of soil slopes at different depths.

[0032] In a preferred embodiment, if Figure 2As shown, the sensor unit assembly 10 includes a connecting sleeve 11 and an acoustic emission signal sensor 12 disposed in the connecting sleeve 11. The acoustic emission signal sensor 12 is disposed close to the inner wall of the penetration rod 2. The acoustic emission signal sensor model is: M304A, a piezoelectric ceramic sensor produced by Fuji Ceramics Co., Ltd. The probe has a built-in FET preamplifier. The sensor has an operating frequency of 10kHz~5MHz (resonant frequency is 300kHz) and a sensitivity of 115±3dB (reference: 0dB=1V / m / s). A noise reduction seal ring 13 is provided between two adjacent connecting sleeves 11, and the noise reduction seal ring 13 is fixedly connected to the corresponding connecting sleeve 11. Furthermore, the connecting sleeve 11 is fixedly connected to the noise reduction seal ring 13 through a connecting threaded area 14, and each sensor unit assembly 10 can be conveniently disassembled and installed through the threaded structure.

[0033] In a preferred embodiment, if Figure 1 As shown, the acoustic emission signal integrated processing box 1 is provided with a battery compartment 4 for removing and installing a battery pack 5. A battery compartment door 6 is provided at the opening of the battery compartment 4. In this embodiment, the battery pack 5 adopts a replaceable power supply mode, which can be conveniently replaced. It should be noted that the battery pack 5 can also adopt a structure integrated in the acoustic emission signal integrated processing box 1 and adopt a rechargeable power supply mode.

[0034] In a preferred embodiment, if Figure 1 As shown, a rain cap 7 with an arc-shaped drainage structure is provided on the top of the acoustic emission signal integrated processing box 1. This type of acoustic emission signal integrated processing box 1 can facilitate drainage in rainy and snowy weather.

[0035] The working principle or working method of this utility model:

[0036] The penetration rod 2 of the array acoustic emission positioning device 100 is penetrated into the hard soil layer and reinforced, and then the signal transmission cable 9 is connected to the acoustic emission signal processing mechanism 3, and the penetration rod 2 is screwed and fixedly connected to the acoustic emission signal integration processing box 1. When the soil near the device is disturbed, the soil disturbance area 16 will generate an acoustic emission signal, which is transmitted to the acoustic emission signal sensor 12 in the penetration rod through the soil. However, the acoustic emission signal sensors 12 at different positions will receive the acoustic emission signals with time or frequency differences due to position differences. The acoustic emission signals are transmitted to the acoustic emission signal processing mechanism for processing via the signal transmission cable. The acoustic emission signal processing mechanism integrates the signals received by the different acoustic emission signal sensors and performs source positioning calculation to obtain the specific area position of the soil disturbance, and then processes the feedback area to prevent the soil slope from landslide. The utility model can monitor the soil at an invisible position below the surface and is widely applicable to fields such as slope monitoring and high-pressure rotary jet grouting pile operation monitoring.

[0037] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An array-type acoustic emission positioning device for real-time monitoring of soil deformation, characterized in that: The array-type acoustic emission positioning device (100) comprises an acoustic emission signal integrated processing box (1) and a hollow penetration rod (2); The acoustic emission signal integrated processing box (1) is integrated with an acoustic emission signal processing mechanism (3) and a battery pack (5); the acoustic emission signal processing mechanism (3) collects and processes the acoustic emission signal and provides feedback information; The penetration rod (2) is a hollow structure, and the top end of the penetration rod (2) is sealedly connected to the acoustic emission signal integrated processing box (1) through a connecting portion (8); the lower portion of the penetration rod (2) is composed of a plurality of sensor monomer assemblies (10) distributed in an array, and the sensor monomer assemblies (10) are electrically connected to the acoustic emission signal processing mechanism (3) through a signal transmission cable (9).

2. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to claim 1 is characterized in that: At least five sensor monomer assemblies (10) are provided at the lower end of the penetration rod (2), and the sensor monomer assemblies (10) are arranged linearly along the penetration rod (2).

3. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to claim 2 is characterized in that: The sensor single body assembly (10) comprises a connecting sleeve (11) and an acoustic emission signal sensor (12) arranged in the connecting sleeve (11); A noise reduction sealing ring (13) is provided between two adjacent connecting sleeves (11), and the noise reduction sealing ring (13) is fixedly connected to the corresponding connecting sleeve (11).

4. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to claim 3 is characterized in that: The connecting sleeve (11) is fixedly connected to the noise reduction sealing ring (13) via a connecting threaded area (14).

5. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to claim 1 is characterized in that: A battery compartment (4) for disassembling and installing a battery pack (5) is provided in the acoustic emission signal integrated processing box (1), and a battery compartment door (6) is correspondingly provided at the opening of the battery compartment (4).

6. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to claim 5, characterized in that: A rain cap (7) with an arc-shaped drainage structure is provided on the top of the acoustic emission signal integrated processing box (1).

7. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to any one of claims 1 to 6, characterized in that: The acoustic emission signal processing mechanism (3) has a signal processing module and a positioning module embedded therein. The signal processing module receives and processes the acoustic emission signal transmitted by the acoustic emission signal sensor (12); and the positioning module receives and positions the acoustic emission signal source generated by the soil disturbance area (16).

8. The array-type acoustic emission positioning device for real-time monitoring of soil deformation according to claim 7, characterized in that: The connecting portion (8) is a threaded connection structure.

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