A device and method for diagnosing and evaluating the health of hydraulic structures based on acoustic reflection

Abstract

The present invention discloses a device and method for diagnosing and evaluating the health of a hydraulic structure based on acoustic wave reflection, and relates to the technical field of hydraulic structure health monitoring, wherein the acoustic wave transmitter is used to transmit high-frequency acoustic waves to the hydraulic structure; the acoustic wave receiver is used to receive the acoustic waves reflected from the hydraulic structure; the signal processing unit is responsible for amplifying, filtering and digitally processing the received acoustic wave signal; the data analysis unit is responsible for analyzing the characteristics of the acoustic wave signal and identifying structural damage; and the health assessment model built into the data analysis unit can evaluate the health status of the hydraulic structure based on the damage identification result. The present invention proposes a device and method for diagnosing and evaluating the health of a hydraulic structure based on acoustic wave reflection, and utilizes the propagation characteristics of acoustic waves in concrete structures to realize non-destructive detection and evaluation of internal damage of the hydraulic structure, and has a high market application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic structure health monitoring, and more specifically, to a hydraulic structure health diagnosis and evaluation device and method based on sound wave reflection. Background Art

[0002] Hydraulic structures are prone to internal damage such as cracks and cavities due to long-term water pressure and wave impact, which affects their safety performance. Traditional health monitoring methods mostly rely on electrical or optical sensors, which have problems such as limited detection range and complex data collection, making it difficult to fully evaluate the health status of hydraulic structures. Summary of the invention

[0003] In order to overcome the defects of the prior art, the present invention proposes a hydraulic structure health diagnosis and assessment device and method based on sound wave reflection, which utilizes the propagation characteristics of sound waves in concrete structures to achieve non-destructive detection and assessment of internal damage of hydraulic structures, and has a high market application prospect.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] The present invention provides a hydraulic structure health diagnosis and assessment device based on acoustic wave reflection, comprising:

[0006] An acoustic wave transmitter, used to emit high-frequency acoustic waves to hydraulic structures;

[0007] An acoustic wave receiver for receiving acoustic waves reflected from the hydraulic structure;

[0008] The signal processing unit is responsible for amplifying, filtering and digitizing the received sound wave signal;

[0009] A data analysis unit, which analyzes the characteristics of the acoustic signal to identify structural damage; and

[0010] The health assessment model built into the data analysis unit can assess the health status of hydraulic structures based on the damage identification results.

[0011] In a preferred technical solution of the present invention, the signal processing unit adopts a digital signal processor or a field programmable gate array to improve the speed and accuracy of signal processing.

[0012] In a preferred technical solution of the present invention, a correction unit is provided on the data analysis unit, and the correction unit includes an infrared temperature sensor, a surface detection module and a processor module, and the infrared temperature sensor and the surface detection module are both electrically connected to the processor module, the infrared temperature sensor is used to detect the temperature information of the surface of the hydraulic structure, and the surface detection module is used to detect the surface deformation and thickness information of the hydraulic structure. The processor module can receive data information from the infrared temperature sensor, the surface detection module and the sound wave receiver and process the data, thereby compensating and correcting the sound wave to eliminate waveform distortion.

[0013] In a preferred technical solution of the present invention, the acoustic wave receiver includes a first acoustic wave probe and a second acoustic wave probe, the first acoustic wave probe is used to receive acoustic wave reflections from the surface of the hydraulic structure, and the second acoustic wave probe is used to receive acoustic wave reflections from inside the hydraulic structure.

[0014] In a preferred technical solution of the present invention, the acoustic wave transmitter, the first acoustic wave probe and the second acoustic wave probe are all provided with a positioning module for locating a diagnosis area.

[0015] The present invention also provides a method for using the above-mentioned hydraulic structure health diagnosis and assessment device, comprising the following steps:

[0016] S1, installing the acoustic wave transmitter and the acoustic wave receiver on the surface of the hydraulic structure;

[0017] S2, the acoustic wave transmitter emits sound waves, which penetrate the hydraulic structure and propagate inside;

[0018] S3, the sound wave receiver receives the reflected sound wave signal and transmits the signal to the signal processing unit;

[0019] S4, the signal processing unit processes the sound wave signal and extracts characteristic information;

[0020] S5, the data analysis unit analyzes the characteristic information to identify structural damage;

[0021] S6. The health assessment model assesses the health status of the hydraulic structure according to the damage identification result.

[0022] In a preferred technical solution of the present invention, the frequency and power of the sound waves emitted by the sound wave transmitter need to be adjusted according to the material properties and dimensions of the hydraulic structure.

[0023] In a preferred technical solution of the present invention, the data analysis unit adopts pattern recognition and signal processing technology to improve the accuracy of damage identification.

[0024] The beneficial effects of the present invention are:

[0025] 1. Non-destructive testing will not cause any damage to hydraulic structures.

[0026] 2. Comprehensive assessment, capable of detecting internal damage of hydraulic structures, with a wider assessment scope.

[0027] 3. High precision, using characteristic analysis of acoustic wave signals to identify minor damages.

[0028] 4. Real-time monitoring can obtain the health status of hydraulic structures in real time and issue early warnings in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a hydraulic structure health diagnosis and assessment device based on sound wave reflection provided by a specific embodiment of the present invention;

[0030] Figure 2 This is a working principle diagram of a hydraulic structure health diagnosis and assessment device based on sound wave reflection in this embodiment.

[0031] In the figure:

[0032] 1. Sound wave transmitter; 2. Sound wave receiver; 21. First sound wave probe; 22. Second sound wave probe; 3. Signal processing unit; 4. Data analysis unit; 5. Health assessment model; 6. Correction unit; 61. Infrared temperature sensor; 62. Surface detection module; 63. Processor module; 7. Positioning module. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] like Figure 1-2 As shown, an embodiment provides a hydraulic structure health diagnosis and assessment device based on acoustic wave reflection, comprising:

[0035] The acoustic wave transmitter 1 is used to transmit high-frequency acoustic waves to the hydraulic structure;

[0036] An acoustic wave receiver 2, used for receiving acoustic waves reflected from the hydraulic structure;

[0037] The signal processing unit 3 is responsible for amplifying, filtering and digitizing the received sound wave signal;

[0038] Data analysis unit 4, responsible for analyzing the characteristics of the acoustic wave signal and identifying structural damage; and

[0039] The health assessment model 5 built into the data analysis unit 4 can assess the health status of the hydraulic structure based on the damage identification result.

[0040] In this embodiment, the acoustic wave transmitter 1, the acoustic wave receiver 2, the signal processing unit 3 and the data analysis unit 4 all have good waterproof performance, which can prevent water damage, and the acoustic wave transmitter 1, the acoustic wave receiver 2, the signal processing unit 3 and the data analysis unit 4 are electrically connected. The acoustic wave transmitter 1 and the acoustic wave receiver 2 are located on the same side of the hydraulic structure, and the transmission power and transmission frequency of the acoustic wave transmitter 1 can be adjusted to meet the detection requirements of hydraulic structures with different material properties and sizes. The acoustic wave receiver 2 can send the received acoustic wave signal to the signal processing unit 3 for processing. The data analysis unit 4 is provided with a 4G gateway, which can package and upload the collected data and analysis results to the cloud, and users can view the data in the cloud in real time through APP, mini-programs, etc. The health assessment model 5 is pre-input with structural damage samples of hydraulic structures under different working conditions, and a deep learning algorithm is used to train the damage assessment model of the hydraulic structure to ensure the accuracy of recognition.

[0041] Specifically, the signal processing unit 3 uses a digital signal processor or a field programmable gate array to improve the speed and accuracy of signal processing.

[0042] Specifically, the data analysis unit 4 is provided with a correction unit 6, which includes an infrared temperature sensor 61, a surface detection module 62 and a processor module 63, and the infrared temperature sensor 61 and the surface detection module 62 are both electrically connected to the processor module 63, the infrared temperature sensor 61 is used to detect the temperature information of the surface of the hydraulic structure, the surface detection module 62 is used to detect the surface deformation and thickness information of the hydraulic structure, and the processor module 63 can receive data information from the infrared temperature sensor 61, the surface detection module 62 and the sound wave receiver 2 and process the data, thereby compensating and correcting the sound wave to eliminate the distortion of the waveform. In this embodiment, since the external factors such as the temperature and size of the hydraulic structure will also affect the amplitude and wave velocity of the sound wave, the correction unit 6 can be set to measure the parameters such as the temperature and size of the hydraulic structure, and the received sound wave waveform can be corrected according to the detection result to eliminate the waveform distortion and improve the accuracy of the waveform. Among them, the infrared temperature sensor 61 and the surface detection module 62 can both perform non-contact detection of hydraulic structures; the processor module 63 is electrically connected to the data analysis unit 4, and the processor module 63 is configured to obtain a correction waveform based on parameter information such as temperature and size, and send the correction data to the data analysis unit 4 for processing, thereby correcting the received sound wave waveform.

[0043] Specifically, the sound wave receiver 2 includes a first sound wave probe 21 and a second sound wave probe 22, the first sound wave probe 21 is used to receive the sound wave reflection from the surface of the hydraulic structure, and the second sound wave probe 22 is used to receive the sound wave reflection from the inside of the hydraulic structure. In this embodiment, when the ultrasonic wave propagates from one medium to another medium, at the interface between the two media, a part of the energy is reflected back to the original medium, which is called the reflected wave, and the other part of the energy propagates through the interface in the other medium, which is called the transmitted wave, that is, after the sound wave enters the inside of the hydraulic structure, its waveform will change compared with the original waveform. The first sound wave probe 21 and the second sound wave probe 22 are respectively used to detect the reflected waves on the surface and inside of the hydraulic structure, so that the signal processing unit 3 can obtain the initial waveform of the sound wave after entering the hydraulic structure through analysis and processing, so as to improve the evaluation accuracy.

[0044] Specifically, the acoustic wave transmitter 1, the first acoustic wave probe 21 and the second acoustic wave probe 22 are all provided with a positioning module 7 for locating the diagnostic area. In this embodiment, the acoustic wave transmitter 1, the first acoustic wave probe 21 and the second acoustic wave probe 22 are located by the positioning module 7, so that the detected area can be marked, repeated detection can be avoided, and work efficiency can be improved.

[0045] This embodiment also provides a method for using the above-mentioned hydraulic structure health diagnosis and assessment device, which is characterized by comprising the following steps:

[0046] S1, installing the acoustic wave transmitter 1 and the acoustic wave receiver 2 on the surface of the hydraulic structure;

[0047] S2, the acoustic wave transmitter 1 emits acoustic waves, which penetrate the hydraulic structure and propagate inside;

[0048] S3, the sound wave receiver 2 receives the reflected sound wave signal and transmits the signal to the signal processing unit 3;

[0049] S4, the signal processing unit 3 processes the sound wave signal to extract characteristic information;

[0050] S5, the data analysis unit 4 analyzes the characteristic information and identifies structural damage;

[0051] S6. Health assessment model 5 assesses the health status of the hydraulic structure based on the damage identification results.

[0052] Specifically, the frequency and power of the sound waves emitted by the sound wave transmitter 1 need to be adjusted according to the material properties and size of the hydraulic structure. In this embodiment, the material properties of the hydraulic structure mainly include sound velocity, density, acoustic impedance and sound absorption coefficient, among which, the sound velocity refers to the propagation speed of sound waves in the medium. The sound velocity of concrete is related to its density and elastic modulus, generally between 3200 and 3800 m / s; density refers to the mass per unit volume. The density of concrete is related to its mix ratio, water-cement ratio, aggregate type, particle size and density, and is generally between 2200 and 2600 kg / m 3 Acoustic impedance refers to the impedance difference between two media when sound waves propagate on the interface between the two media. The impedance difference of concrete is related to its density, sound speed and wavelength, and is generally between 6.5 and 8.5×10 6 kg / (m 2 ·s); the sound absorption coefficient refers to the ability of a material to absorb sound waves. The sound absorption coefficient of concrete is related to factors such as its surface shape, porosity, density, thickness and sound wave incident angle, and is generally between 0.02-0.1.

[0053] Specifically, the data analysis unit 4 uses pattern recognition and signal processing technology to improve the accuracy of damage identification.

[0054] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A hydraulic structure health diagnosis and assessment device based on acoustic wave reflection, characterized in that: include: An acoustic wave transmitter (1) is used to transmit high-frequency acoustic waves to the hydraulic structure; An acoustic wave receiver (2) for receiving acoustic waves reflected from the hydraulic structure; The signal processing unit (3) is responsible for amplifying, filtering and digitizing the received sound wave signal; A data analysis unit (4) is responsible for analyzing the characteristics of the acoustic wave signal and identifying structural damage; as well as A health assessment model (5) built into the data analysis unit (4) is capable of assessing the health status of the hydraulic structure based on the damage identification results; The data analysis unit (4) is provided with a correction unit (6), the correction unit (6) comprising an infrared temperature sensor (61), a surface detection module (62) and a processor module (63), and the infrared temperature sensor (61) and the surface detection module (62) are both electrically connected to the processor module (63), the infrared temperature sensor (61) is used to detect temperature information on the surface of the hydraulic structure, the surface detection module (62) is used to detect surface deformation and thickness information of the hydraulic structure, and the processor module (63) is capable of receiving data information from the infrared temperature sensor (61), the surface detection module (62) and the sound wave receiver (2) and processing the data, thereby compensating and correcting the sound wave to eliminate waveform distortion; The acoustic wave receiver (2) comprises a first acoustic wave probe (21) and a second acoustic wave probe (22); the first acoustic wave probe (21) is used to receive acoustic wave reflections from the surface of the hydraulic structure, and the second acoustic wave probe (22) is used to receive acoustic wave reflections from inside the hydraulic structure.

2. The device for diagnosing and evaluating the health of hydraulic structures based on acoustic wave reflection according to claim 1 is characterized in that: The signal processing unit (3) adopts a digital signal processor or a field programmable gate array to improve the speed and accuracy of signal processing.

3. The device for diagnosing and evaluating the health of hydraulic structures based on acoustic reflection according to claim 2 is characterized in that: The sound wave transmitter (1), the first sound wave probe (21) and the second sound wave probe (22) are all provided with a positioning module (7) for locating a diagnosis area.

4. A method for using the hydraulic structure health diagnosis and assessment device according to any one of claims 1 to 3, characterized in that: The steps include: S1. Installing the acoustic wave transmitter (1) and the acoustic wave receiver (2) on the surface of a hydraulic structure; S2, the acoustic wave transmitter (1) emits acoustic waves, which penetrate the hydraulic structure and propagate inside; S3, the sound wave receiver (2) receives the reflected sound wave signal and transmits the signal to the signal processing unit (3); S4, the signal processing unit (3) processes the sound wave signal to extract characteristic information; S5, the processor module (63) of the correction unit (6) obtains a correction waveform according to the parameter information, and sends the correction data to the data analysis unit (4) for processing, and the data analysis unit (4) analyzes the characteristic information to identify structural damage; S6. The health assessment model (5) assesses the health status of the hydraulic structure according to the damage identification result.

5. The method for using the hydraulic structure health diagnosis and assessment device according to claim 4 is characterized by: The frequency and power of the sound waves emitted by the sound wave transmitter (1) need to be adjusted according to the material properties and dimensions of the hydraulic structure.

6. The method for using the hydraulic structure health diagnosis and assessment device according to claim 4 is characterized by: The data analysis unit (4) adopts pattern recognition and signal processing technology to improve the accuracy of damage identification.

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