A voiceprint recognition system for pipeline leak detection

Abstract

This utility model relates to the field of low-carbon operation and maintenance technology for smart parks, specifically providing a voiceprint recognition system for pipeline leak detection. The system includes a pipe with a metal base tightly attached to its upper surface. A waterproof microphone is fixed to one side of the metal base and wirelessly connected to a circuit module. A piezoelectric ceramic vibrator is located on the upper part of the metal base, and acoustic waveguide silicone is located on the upper part of the piezoelectric ceramic vibrator. The waterproof microphone is positioned on top of the acoustic waveguide silicone, transmitting the sound of leakage to the waterproof microphone, which then transmits the sound to the circuit module. The piezoelectric ceramic vibrator is electrically connected to the circuit module. Compared with existing technologies, this utility model can enhance the signal-to-noise ratio of leakage sound waves and meet the high-precision requirements of park pipeline networks.

Description

Technical Field

[0001] This utility model relates to the field of low-carbon operation and maintenance technology for smart parks, specifically providing a voiceprint recognition system for pipeline leakage detection. Background Technology

[0002] In the operation and maintenance of pipeline networks in smart parks, pipeline leak detection is a crucial step in ensuring low-carbon operation. Traditional pipeline leak detection methods have many shortcomings: they rely on manual inspections or single vibration sensors, are easily affected by environmental noise, and have a high rate of missed detections; existing acoustic detection equipment often requires an external power supply, has poor waterproof performance, and is difficult to deploy for long periods in humid pipe gallery environments.

[0003] Further analysis of the existing technology reveals significant drawbacks: the microphone is directly exposed to the air, and the collected signal contains a large amount of environmental noise, affecting the accurate identification of leakage sound patterns; the sensor housing lacks a dedicated vibration transmission structure, resulting in insufficient ability to capture weak leakage signals and failing to meet the high-precision requirements of the park's pipeline network. Summary of the Invention

[0004] This utility model addresses the shortcomings of the prior art by providing a design that is reasonable, simple in structure, safe to use, and remotely controllable.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A voiceprint recognition system for detecting leaks in a pipeline network includes a pipe, a metal base is tightly attached to the upper surface of the pipe, a waterproof microphone is fixed to one side of the metal base, and the waterproof microphone is wirelessly connected to a circuit module.

[0007] The metal base is provided with a piezoelectric ceramic vibrating plate on its upper part, and an acoustic waveguide silicone is provided on the upper part of the piezoelectric ceramic vibrating plate. The waterproof microphone is located on the upper part of the acoustic waveguide silicone to conduct the sound of water leakage to the waterproof microphone, and the waterproof microphone sends the sound to the circuit module. The piezoelectric ceramic vibrating plate is electrically connected to the circuit module.

[0008] Furthermore, the metal base is made of 304 stainless steel or titanium alloy, and the bottom of the metal base is set according to the shape of the pipe.

[0009] Furthermore, the top of the waterproof microphone is covered with a waterproof and sound-permeable membrane made of PTFE material, and four miniature microphone elements are arranged in a cross shape inside.

[0010] Furthermore, the circuit module includes a circuit box housing, inside which are provided several slots. A preamplifier, a bandpass filter, a Bluetooth or LoRa wireless transmission unit, and a lithium battery compartment are placed in the slots. The preamplifier, bandpass filter, Bluetooth or LoRa wireless transmission unit, and lithium battery compartment are electrically connected.

[0011] Furthermore, the circuit box housing has an interface groove on the opening plate that engages with the box body, and a double O-ring is installed on the interface groove for sealing.

[0012] Furthermore, the bottom of the circuit box housing is provided with magnetic attraction or buckle for fixing the circuit module to the pipe.

[0013] Preferably, the circuit box has an IP68 waterproof enclosure made of high-strength engineering plastic.

[0014] Compared with existing technologies, the voiceprint recognition system for pipeline leak detection of this utility model has the following outstanding advantages:

[0015] (1) The combination structure of vibration transmission metal base and piezoelectric ceramic vibrating plate is adopted to directly contact the pipe surface, convert mechanical vibration into electrical signal, effectively suppress air noise interference and enhance the signal-to-noise ratio of leakage sound wave.

[0016] (2) The waterproof microphone array is equipped with a waterproof and sound-permeable membrane made of PTFE material and an IP68-rated sealed shell. The interface is sealed with double O-ring rubber rings, and the waterproof rating is upgraded from the traditional IP54 to IP68, which can work in humid or even submerged environments for a long time.

[0017] (3) The bottom adopts a magnetic or snap-on fixing structure, which reduces the installation time from 5 minutes / piece of traditional bolt fixing to 10 seconds / piece, improving deployment efficiency and eliminating the need to damage the pipe body, making it easy to quickly disassemble and maintain. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Appendix Figure 1 This is a schematic diagram of a metal base and waterproof microphone structure in a voiceprint recognition system for pipeline leak detection;

[0020] Appendix Figure 2 This is a schematic diagram of a circuit module structure in a voiceprint recognition system for pipeline leak detection;

[0021] Appendix Figure 3 This is a schematic diagram of the signal processing process of a voiceprint recognition system used for pipeline leak detection.

[0022] The markings in the attached diagram represent:

[0023] 1. Pipe, 2. Metal base, 3. Acoustic waveguide silicone, 4. Waterproof and sound-permeable membrane, 5. Waterproof microphone, 6. Piezoelectric ceramic vibrator, 7. Circuit box housing, 8. Card slot, 9. Rubber ring, 10. Interface groove, 11. Top opening plate, 12. Box body, 13. Circuit module. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0025] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" generally refer to the upper, lower, left, and right as shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself.

[0026] The following is a preferred embodiment:

[0027] like Figure 1-2 As shown, a voiceprint recognition system for detecting pipeline leaks in this embodiment includes a pipe 1, a metal base 2 is closely attached to the upper surface of the pipe 1, and a waterproof microphone 5 is fixed to the left side of the metal base 2 in this embodiment. The waterproof microphone 5 is wirelessly connected to the circuit module 13.

[0028] A piezoelectric ceramic vibrator 6 is provided on the upper part of the metal base 2. A waveguide silicone 3 is provided on the upper part of the piezoelectric ceramic vibrator 6. A waterproof microphone 5 is provided on the upper part of the waveguide silicone 3 to conduct the sound of water leakage to the waterproof microphone 5. The waterproof microphone 5 sends the sound to the circuit module 13. The piezoelectric ceramic vibrator 6 is electrically connected to the circuit module.

[0029] The metal base 2 is made of 304 stainless steel or titanium alloy, which has good wear resistance and vibration transmission performance. In this embodiment, the bottom shape is arc-shaped, and the shape can be selected to fit the curvature of the pipe 1 so as to closely fit the surface of the pipe 1. The piezoelectric ceramic vibrator 6 is fixedly connected to the metal base 2 and can convert the mechanical vibration of the pipe 1 into an electrical signal.

[0030] The top of the waterproof microphone 5 is covered with a PTFE waterproof and acoustically permeable membrane 4, which protects the array of the waterproof microphone 5. Inside, there are 4 miniature microphone elements arranged in a cross shape.

[0031] Circuit module 13 includes a circuit box housing 7, and the circuit box housing 7 has several slots 8 inside. A preamplifier, a bandpass filter, a Bluetooth or LoRa wireless transmission unit and a lithium battery compartment are placed in the slots 8. The preamplifier, bandpass filter, Bluetooth or LoRa wireless transmission unit and lithium battery compartment are electrically connected.

[0032] The circuit box housing 7 has an interface groove 10 on the opening plate 11 that engages with the box body 12, and a double O-ring rubber ring 9 is installed on the interface groove 10 for sealing.

[0033] In this embodiment, the bottom of the circuit box housing 7 is provided with a magnetic attraction, and a strong magnet is embedded in the bottom of the circuit box housing 7 to fix the circuit module 13 on the pipe 1.

[0034] In this embodiment, a voiceprint recognition system for detecting pipeline leaks is used by fixing a metal base 2 and a circuit module 13 to a pipe 1. The vibration of the pipe 1 surface is transmitted to the vibration-conducting metal base 2, and converted into a vibration electrical signal by a piezoelectric ceramic vibrating plate 6. At the same time, the leakage sound wave is transmitted to the waterproof microphone array 5 through the acoustic waveguide silicone 3 to generate an acoustic electrical signal. Both the vibration electrical signal and the acoustic electrical signal are transmitted to the circuit module 13, processed, and then sent through a Bluetooth or LoRa wireless transmission unit.

[0035] This invention can enhance the signal-to-noise ratio of leaking sound waves and meet the high-precision requirements of the park's pipeline network.

[0036] The embodiments described above are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution should be included within the protection scope of this utility model.

Claims

1. A voiceprint recognition system for detecting leaks in pipeline networks, comprising pipelines, characterized in that, The upper surface of the pipe is tightly fitted with a metal base, and a waterproof microphone is fixed on one side of the metal base. The waterproof microphone is connected to the circuit module wirelessly. The metal base is provided with a piezoelectric ceramic vibrating plate on its upper part, and an acoustic waveguide silicone is provided on the upper part of the piezoelectric ceramic vibrating plate. The waterproof microphone is located on the upper part of the acoustic waveguide silicone to conduct the sound of water leakage to the waterproof microphone, and the waterproof microphone sends the sound to the circuit module. The piezoelectric ceramic vibrating plate is electrically connected to the circuit module.

2. An acoustic fingerprinting system for leak detection in a pipe network according to claim 1, characterised in that, The metal base is made of 304 stainless steel or titanium alloy, and the bottom of the metal base is set according to the shape of the pipe.

3. A voiceprint recognition system for leak detection in a pipe network according to claim 2, characterized in that, The top of the waterproof microphone is covered with a waterproof and sound-permeable membrane made of PTFE material, and four miniature microphone elements are arranged in a cross shape inside.

4. A voiceprint recognition system for leak detection in a pipe network according to claim 3, characterized in that, The circuit module includes a circuit box housing, inside which are provided several slots. A preamplifier, a bandpass filter, a Bluetooth or LoRa wireless transmission unit, and a lithium battery compartment are placed in the slots. The preamplifier, bandpass filter, Bluetooth or LoRa wireless transmission unit, and lithium battery compartment are electrically connected.

5. A voiceprint recognition system for leak detection in a pipe network according to claim 4, characterized in that, The circuit box housing has an interface groove on the opening plate that engages with the box body, and a double O-ring is installed on the interface groove for sealing.

6. An acoustic fingerprinting system for leak detection in a pipe network according to claim 4, characterised in that, The bottom of the circuit box housing is equipped with a magnetic or snap-fit ​​device for fixing the circuit module to the pipe.

7. A voiceprint recognition system for leak detection in a pipe network according to claim 6, characterised in that, The circuit box housing is an IP68 waterproof shell made of high-strength engineering plastic.

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