A sound array acquisition device for leak detection in urban underground pipe networks

Abstract

The present invention relates to a sound array collection device for leak detection of urban underground pipe networks, the device comprises a handheld control terminal and a plurality of sound collectors arranged in the pipe network area to be detected, each sound collector comprises a protective shell and a rechargeable battery arranged in the protective shell, a data processing module and a sound sensor, a data storage module, a wireless transmission module and a data storage module respectively connected to the data processing module, and each sound collector performs wireless data communication with the handheld control terminal via the wireless transmission module. Compared with the prior art, the present invention has the advantages of accurate pipe network detection and positioning, high efficiency, loss prevention, high safety, low power consumption, small volume and weight, etc.

Description

Technical Field

[0001] The invention relates to the technical field of urban underground pipe network leakage detection, and in particular to a sound array acquisition device used for urban underground pipe network leakage detection. Background Art

[0002] The urban underground pipe network system is complicated and accidents occur frequently. Due to the hidden characteristics of the pipe network buried underground, it brings great challenges to the detection, positioning and maintenance of pipe network damage. At present, the detection and positioning of underground pipe network damage in my country is mainly carried out by leak detection personnel through discrete point listening and judgment through leak detection equipment. The main devices include headphones and ground microphones. The inspectors who perform the inspection walk along the pipeline and use ground microphones to listen to the leaking points of the underground pipeline on the ground. Because the sound generation and attenuation of different media are different, the placement spacing of the microphones is related to the material and medium of the pipeline. The spacing of metal pipes is 1 to 2m, while that of non-metallic pipes is 0.5 to 1m, the spacing of cement pavements is 1 to 2m, and that of soil pavements is 0.5m. Generally, obvious leakage sounds can be heard within a distance of 5m, and experienced leak detection personnel can judge the state of pipeline damage based on the sound.

[0003] However, the existing detection technology has low efficiency and poor accuracy, and can no longer meet the needs of large cities for pipeline leakage surveys. At present, there is little research on rapid detection technology for the region, which has a series of problems such as difficult pipeline detection, inaccurate positioning, and low detection efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a sound array acquisition device for leak detection of urban underground pipe networks.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A sound array collection device for leak detection in urban underground pipe networks, the device comprises a handheld control terminal and a plurality of sound collectors arranged in the pipe network area to be detected, each sound collector comprises a protective shell and a rechargeable battery arranged in the protective shell, a data processing module, and a sound sensor, a data storage module, a wireless transmission module, and a data storage module respectively connected to the data processing module, each sound collector performs wireless data communication with the handheld control terminal via the wireless transmission module, and the sound sensor adopts a high-sensitivity piezoelectric pickup.

[0007] The device also includes an instrument box for portable placement of a handheld control terminal and a plurality of sound collectors.

[0008] The instrument box is a metal instrument box, which is composed of a box cover and a box body that are buckled together by metal buckles. A handle is provided on the outer wall of the box body, and a wireless charging base with a power socket is provided at the bottom of the box body for wirelessly charging the rechargeable battery of the sound collector.

[0009] The protective shell is in the form of a regular polyhedron or a cylinder, and a reflective coating is coated on its surface to reflect light under the irradiation of a light source and attract attention.

[0010] The protective shell is in the shape of a regular dodecahedron.

[0011] The bottom of the protective shell is magnetic and is used to be adsorbed on the wall surface of the metal pipe to be tested.

[0012] A buzzer connected to the data processing module is also arranged in the protective shell of the sound collector, which is used to emit a sound to facilitate retrieval after receiving a signal from the handheld control terminal.

[0013] The protective shell of the sound collector is also provided with a positioning module connected to the data processing module to obtain the layout position information of the sound collector.

[0014] The data for wireless data communication between the sound collector and the handheld control terminal includes the sound signal data collected by the sound sensor, data processing results, working status information and location information. The location information is specifically the geographic spatial location information of multiple sound collectors and the distance information from the handheld control terminal, which is used to draw a location distribution map of the sound collectors.

[0015] The steps of using the sound array acquisition device to detect leaks in urban underground pipe networks are as follows:

[0016] 1) Throwing multiple sound collectors randomly or at fixed points onto the ground of area A to be collected;

[0017] 2) The handheld control terminal sends instructions to each sound collector, and the instructions reach the sound collector through the wireless transmission module. After receiving the instructions, the sound collector starts to collect sound signals under the working parameters specified by the instructions;

[0018] 3) Processing the collected sound signals by a data processing module, wherein the sound signals include sound pressure, sound pressure level, sound intensity, sound intensity level, sound power, sound power level, signal-to-noise ratio and spectrum characteristic data;

[0019] 4) Obtain the location information of the sound collector through the positioning module;

[0020] 5) After the sound collector completes the sound signal collection, it sends the sound signal collected by itself, the sound signal processing result, the working status information and the location information to the handheld control terminal;

[0021] 6) The handheld control terminal receives and saves the data sent back by each sound collector;

[0022] 7) Recover the sound collector and place it in the instrument box, move it to the next adjacent area B to be collected, and repeat steps 1)-7) to complete signal collection;

[0023] 8) After the collection is completed, the handheld control terminal performs local or remote data processing. The remote processing is to transmit all the data of the area to be collected to the host computer or server through the wireless transmission network through the handheld control terminal, and the host computer or server performs data processing;

[0024] 9) During the data processing, the sound collector data is first processed independently, and then the data of multiple sound collectors are correlated to obtain the sound field distribution map of each area to be collected, and then the sound field distribution maps of all areas to be collected are merged to complete the sound field distribution detection of the urban underground pipe network area;

[0025] 10) The acquired sound characteristic information is used to determine the leakage characteristics of underground pipe networks of different types and states, and the leakage position of underground pipe networks is located through the sound field distribution.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The present invention deploys a network of sound collectors to randomly detect damaged areas of underground pipe networks over a large area, providing a more economical and rapid detection technology for the operation and maintenance of urban pipe networks, solving a series of problems such as difficult pipe network detection, inaccurate positioning, and low detection efficiency.

[0028] 2. A buzzer is installed inside the sound collector to make a sound to attract attention after receiving a signal from the handheld control terminal, thus effectively preventing loss.

[0029] 3. There is a reflective coating on the outer surface of the protective shell, which can attract attention when illuminated by light. When working at night, it can remind passing vehicles to prepare for safety. It is also magnetic and can be easily adsorbed on metal surfaces, such as the wall of a metal pipe.

[0030] 4. The present invention utilizes UWB communication technology, which is suitable for short-range high-speed transmission. It can send sound data to a handheld control terminal, and has very low power consumption. It only needs a small-capacity battery to achieve long-term operation. It has great advantages over traditional wireless devices in terms of battery life and electromagnetic radiation. In addition, since the circuit structure of the pulse generation is simple, it is relatively easy to integrate into the chip, effectively reducing the battery capacity required for the sound collector and thereby reducing the weight and size of the sound collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the principle structure of the present invention.

[0032] Figure 2 It is a structural schematic diagram of the sound collector of the present invention.

[0033] Figure 3 It is a schematic diagram of an instrument box of the present invention.

[0034] Figure 4 It is a schematic diagram of the handheld control terminal of the present invention.

[0035] Figure 5 It is a schematic diagram of the working state of the present invention.

[0036] Description of the markings in the figure:

[0037] 101-handheld control terminal, 102-sound collector, 201-sound sensor, 202-data storage module, 203-data processing module, 204-wireless transmission module, 205-positioning module, 206-rechargeable battery, 207-buzzer, 208-protective shell, 301-metal buckle, 302-wireless charging base, 303-power socket, 304-handle, 401-antenna, 402-power socket, 403-display screen, 404-button, 501-collection area A, 502-collection area B. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In order to make the purpose, technical features and implementation effects of the present invention more clear, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1-4 As shown, the present invention provides a sound array collection device for leak detection of urban underground pipe networks, the device comprising a plurality of sound collectors 102 and a handheld control terminal 101 .

[0041] The sound collector 102 includes a protective shell 208 of a regular polyhedron (a regular dodecahedron in this example) or a cylinder, and a sound sensor 201, a data storage module 202 (a common data storage device, such as a hard disk, a flash memory, etc., is used in this example), a data processing module 203 (a common data processing chip, such as an embedded ARM9 processor, etc., is used in this example), a wireless transmission module 204 (a common wireless transceiver module, such as Bluetooth, WiFi, 4G / 5G, LoRa, NB-IoT, UWB communication module, etc., is used in this example), a positioning module 205 (a GPS, Beidou positioning module is used in this example), a rechargeable battery 206, and a buzzer 207. The protective shell 208 is used to resist the impact of being thrown and falling to the ground, and a reflective coating is provided on its outer surface. When illuminated by a light source, it can attract attention. When working at night, it can remind passing vehicles and personnel to prepare for safety.

[0042] The sound collector 102 integrates the following functions:

[0043] The sound collector 102 has a built-in sound sensor 201 (a microphone is used in this example), which is a highly sensitive piezoelectric sensor that can collect tiny sound signals and store them in the data storage module 202 .

[0044] The data processing module 202 processes the collected sound signals, which include data such as sound pressure, sound pressure level, sound intensity, sound intensity level, sound power, sound power level, signal-to-noise ratio and spectrum characteristics.

[0045] The wireless transmission module 204 can realize data communication transmission between the sound collector 102 and the handheld control terminal 101. The wireless transmission module 204 used is required to be suitable for short-range high-speed transmission, and can send sound data to the handheld control terminal 101. It has very low power consumption and only requires a small-capacity battery to achieve long-term operation. It has long battery life and low electromagnetic radiation, and has great advantages.

[0046] The positioning module 205 is used to obtain the spatial position of each sound collector 102 and the distance between each sound collector 102 and the handheld control terminal 101 .

[0047] The battery used by the sound collector 102 is a rechargeable battery 206 . When placed in an instrument case, the rechargeable battery 206 can be charged through a wireless charging base 302 at the bottom of the device case.

[0048] The sound collector 102 has a built-in buzzer 207, which can emit a sound to draw attention after receiving a signal from the handheld control terminal 101 to prevent the position from being lost.

[0049] The handheld control terminal 101 is provided with a wireless communication function, a GPS positioning function, a lithium battery, a display screen 403 and a button 404. The sound collector 102 can be configured through the wireless communication function, and the sound data transmitted by the sound collector 102 can be received, the position of each sound collector 102 can be located, and the sound data can be sent to a host computer or server. The GPS or Beidou positioning function can obtain the current position of the handheld control terminal 101.

[0050] like Figure 5 As shown, in this embodiment, the sound array acquisition steps using this device are as follows:

[0051] 1) randomly throwing a plurality of sound collectors 102 onto the ground of the area A to be collected;

[0052] 2) One person holds the handheld control terminal 101 and issues instructions to each sound collector 102. The instructions reach the sound collector 102 through the wireless transmission module 204. After receiving the instructions, the sound collector 102 starts working under the working parameters specified by the instructions;

[0053] 3) After the sound signal collection is completed, the sound collector 102 sends the collected sound signal, processing result and location information to the handheld control terminal 101;

[0054] 4) The handheld control terminal 101 receives and saves the data sent back by each sound collector 102;

[0055] 5) Recover the sound collector 102 and place it in the instrument box, move it to the next adjacent area B to be collected, and repeat the above steps to complete the collection.

[0056] 6) After the acquisition is completed, the handheld control terminal 101 transmits all data to the host computer or server through the wireless transmission system. The host computer processes and extracts information to make the sound field distribution map of the area A to be collected and the area B to be collected.

[0057] By using this device, when the spatial positions of the sound collector 102 and the handheld control terminal 101 are known, the distribution scatter diagram of all devices can be obtained through geometric features, and the current area position can be obtained through the GPS system of the handheld control terminal 101. A plane scatter diagram is compiled on the computer, and there is a sound signal at each scatter point. By extracting the sound feature parameters, the sound field distribution in the current area can be obtained. When the detection in this area is completed, the sound collector 102 is recovered and randomly scattered to the next area, and a plane scatter network diagram can be obtained. By merging it with the previous area, the sound field distribution in a larger range can be obtained.

[0058] The characteristic parameters of sound include sound pressure, sound pressure level, sound intensity, sound intensity level, sound power, sound power level, signal-to-noise ratio and spectral characteristics. The scattered distribution value of each sound characteristic parameter in the area is plotted by computer, and the intervals are interpolated using the three-dimensional difference method to draw a sound field distribution cloud map in the area. The points with uneven sound field distribution are manually reviewed to determine the cause of the abnormality.

[0059] The integrated processing of the sound signal can be completed by the handheld control terminal 101 or the corresponding computer built-in software program.

Claims

1. A sound array acquisition device for urban underground pipe network leakage detection, characterized in that: The device comprises a handheld control terminal (101) and a plurality of sound collectors (102) arranged in a pipe network area to be detected, each sound collector comprising a protective shell (208) and a rechargeable battery (206) arranged in the protective shell (208), a data processing module (203), and a sound sensor (201), a data storage module (202) and a wireless transmission module (204) respectively connected to the data processing module (203), each sound collector (102) performs wireless data communication with the handheld control terminal (101) via the wireless transmission module (204), and the sound sensor (201) adopts a high-sensitivity piezoelectric pickup; A positioning module (205) connected to the data processing module (203) is also provided in the protective shell (208) of the sound collector (102) for obtaining the layout position information of the sound collector (102); The data of the wireless data communication between the sound collector (102) and the handheld control terminal (101) includes the sound signal data collected by the sound sensor (201), the data processing result, the working state information and the position information, wherein the position information is specifically the geographical space position information of the plurality of sound collectors (102) and the distance information from the handheld control terminal (101), so as to draw a position distribution map of the sound collectors; The steps of using the sound array acquisition device to detect leaks in urban underground pipe networks are as follows: 1) randomly or fixedly scattering a plurality of sound collectors (102) onto the ground of an area A to be collected; 2) The handheld control terminal (101) sends a command to each sound collector (102), and the command reaches the sound collector (102) through the wireless transmission module (204). After receiving the command, the sound collector (102) starts collecting sound signals under the working parameters specified by the command; 3) Processing the collected sound signals by a data processing module (203), wherein the sound signals include sound pressure, sound pressure level, sound intensity, sound intensity level, sound power, sound power level, signal-to-noise ratio and frequency spectrum feature data; 4) obtaining the location information of the sound collector through the positioning module (205); 5) After the sound signal collection is completed, the sound collector (102) sends the collected sound signal, the sound signal processing result, the working status information and the location information to the handheld control terminal (101); 6) The handheld control terminal (101) receives and saves the data sent back by each sound collector (102); 7) Recover the sound collector (102) and place it in the instrument box, move it to the next adjacent area B to be collected, and repeat steps 1) to 7) to complete signal collection; 8) After the collection is completed, the handheld control terminal (101) performs remote processing, wherein the handheld control terminal (101) transmits all the data of the area to be collected to a host computer or server through a wireless transmission network, and the host computer or server performs data processing; 9) During the data processing, the data of the sound collector (102) is first processed independently, and then the data of multiple sound collectors (102) are correlated to obtain a sound field distribution map of each area to be collected, and then the sound field distribution maps of all the areas to be collected are merged to complete the sound field distribution detection of the urban underground pipe network area; 10) The acquired sound information is used to determine the leakage characteristics of underground pipe networks of different types and states, and the leakage position of underground pipe networks is located through the sound field distribution.

2. The sound array acquisition device for urban underground pipe network leak detection according to claim 1, characterized in that: The device also includes an instrument box for portable placement of a handheld control terminal (101) and a plurality of sound collectors (102).

3. The sound array acquisition device for urban underground pipe network leakage detection according to claim 2, characterized in that: The instrument box is a metal instrument box, which is composed of a box cover and a box body that are buckled together by a metal buckle (301). The outer wall of the box body is provided with a handle (304), and a wireless charging base (302) with a power socket (303) is provided at the bottom of the box body for wirelessly charging the rechargeable battery (206) of the sound collector (102).

4. The sound array acquisition device for urban underground pipe network leakage detection according to claim 1, characterized in that: The protective shell (208) is in the form of a regular polyhedron or a cylinder, and is coated with a reflective coating on its surface so as to reflect light under the illumination of a light source and attract attention.

5. The sound array acquisition device for urban underground pipe network leakage detection according to claim 4, characterized in that: The protective shell (208) is in the shape of a regular dodecahedron.

6. The sound array acquisition device for urban underground pipe network leakage detection according to claim 4, characterized in that: The bottom of the protective shell (208) is magnetic and is used to be adsorbed on the wall surface of the metal pipe to be tested.

7. The sound array acquisition device for urban underground pipe network leak detection according to claim 1, characterized in that: A buzzer (207) connected to the data processing module (203) is also provided in the protective housing (208) of the sound collector (102) for emitting a sound to facilitate retrieval after receiving a signal from the handheld control terminal (101).

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