CN116293473B - Improved generation pipeline sonar wet end processing apparatus - Google Patents
Improved generation pipeline sonar wet end processing apparatusInfo
- Publication number
- CN116293473B CN116293473B CN202211571564.1A CN202211571564A CN116293473B CN 116293473 B CN116293473 B CN 116293473B CN 202211571564 A CN202211571564 A CN 202211571564A CN 116293473 B CN116293473 B CN 116293473B
- Authority
- CN
- China
- Prior art keywords
- circuit
- slip ring
- transducer
- conductive slip
- stepping motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/08—Slip-rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention relates to the technical field of underwater acoustic signal detection, in particular to an improved pipeline sonar wet end processing device which mainly comprises a transducer, a conductive slip ring, a stepping motor, a receiving pretreatment circuit, a processing circuit and a transmitting circuit, wherein the processing circuit is sequentially connected with the receiving pretreatment circuit, the conductive slip ring, the stepping motor and the transducer, the processing circuit is sequentially connected with the transmitting circuit, the conductive slip ring and the stepping motor, and the processing circuit realizes the delivery of processed data with display control equipment through an Ethernet interface. The invention can be used for the multichannel parallel operation of the pipeline sonar in the underwater sound field, and can improve the processing efficiency and the pipeline detection efficiency of the pipeline sonar compared with the traditional pipeline sonar.
Description
Technical Field
The invention relates to the technical field of underwater acoustic signal detection, in particular to an improved pipeline sonar wet end processing device.
Background
1. Basic conditions of the conventional technology:
The traditional plugging-water pumping-dredging-detecting mode is time-consuming and labor-consuming, has potential safety hazards of personnel going into the well, and needs to be replaced by adopting an advanced technical means. The pipe diameter of the rain and sewage pipeline is between 400mm and 1200mm, and the environment in the rain pipe and the sewage pipe is slightly different. The rainwater pipe has clear water quality but contains a plurality of suspended matters, the suspended matters are single, such as branches and leaves, and the like, the sewage pipe is mostly black and odorous water, and the suspended matters are various, such as plastic products, steel wire balls, and the like, domestic garbage, and the like, have strong smell, and are harmful gases, such as hydrogen sulfide and the like. Structural defects such as cracking, deformation, dislocation, fluctuation, disconnection, hidden connection of branch pipes, siltation, foreign matter insertion and the like in the pipeline need to be detected.
Under the full water condition, optical devices such as cameras and the like are severely limited, and the optimal detection mode is to adopt sonar for detection. The existing sonar detection technology generally adopts single-beam mechanical circular-scan sonar (pipeline sonar), only the section of a pipeline can be scanned, the scanning speed is low, and only deformation, siltation and branch pipe hidden connection can be detected. Other defects (e.g., cracks) are not discernible or are extremely difficult to discern because of too low a resolution and too difficult an actual operation. In addition, single beam sonar has low detection efficiency (mechanical rotational scanning, image reconstruction is required).
The conventional technology has the defects that:
the conventional pipe sonar has the following disadvantages:
(1) The traditional pipeline sonar is mainly single-beam mechanical circular-scan sonar. The working principle is that the single-channel transducer is controlled to rotate for one circle by the rotation of a motor arranged in the device, so that the signal collection of one circle of pipe network is realized, and the working mode is limited by the transmission time and the processing time of sonar echo. The motor cannot rotate too fast, and the running speed of the underwater robot for pipe network detection cannot be too fast, otherwise, the frame loss phenomenon of the pipe network detection image is caused.
(2) The resolution is low, the working center frequency of the traditional pipeline sonar is not more than 2.5MHz, and the horizontal and vertical angular resolutions are also above 1.5 degrees.
The technical problems to be solved by the invention mainly include the following aspects:
(1) The detection efficiency of the pipeline sonar is improved, and the investigation efficiency of the pipeline sonar to the urban pipe network is accelerated.
(2) And the resolution of the pipeline sonar is improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses an improved pipeline sonar wet end processing device and a structure thereof, which can be used for multi-channel parallel operation of pipeline sonar in the field of underwater sound, and can improve the processing efficiency and the pipeline detection efficiency of the pipeline sonar compared with the traditional pipeline sonar.
The invention is realized by the following technical scheme:
The improved pipeline sonar wet end processing device mainly comprises a transducer, a conductive slip ring, a stepping motor, a receiving pretreatment circuit, a processing circuit and a transmitting circuit, wherein the processing circuit is sequentially connected with the receiving pretreatment circuit, the conductive slip ring, the stepping motor and the transducer, the processing circuit is sequentially connected with the transmitting circuit, the conductive slip ring and the stepping motor, and the processing circuit realizes the delivery of processed data and display control equipment through an Ethernet interface.
Preferably, the cross section of the shell of the transducer is in a regular hexagon structure, six transducer probes are uniformly distributed on the circumferential surface of the shell of the transducer, and the transducer probes are driven by the stepping motor to rotate for more than 60 circles within 1 minute.
Preferably, the conductive slip ring is used for transmitting electric signals, the connection part of the conductive slip ring rotates relatively, the electric wires can not be wound, the stator end of the conductive slip ring is connected with the stepping motor to form a fixed part, and the rotor end drives the transducers with six transducer probes.
Preferably, the conductive slip ring adopts a customized mode and is designed with seven coils.
Preferably, the stepping motor has large torque, low temperature rise, numerical control winding and high consistency, and adopts a circular design in structural design.
Preferably, the receiving preprocessing circuit mainly comprises the following three parts:
the fixed amplifying circuit is an AD 8232 dual-channel high-performance instrument amplifier, so that front-stage impedance matching and fixed gain amplification are realized, the gain is set to be 10-20 dB, and the AD 8232 is packaged by adopting a small 4mm multiplied by 4mm LFCSP;
The voltage-controlled amplifying circuit selects an 8-channel ultralow-power-consumption variable gain amplifier VCA8500 chip with a low-noise preamplifier of TI company;
and the local oscillation circuit is used for realizing the generation of the local oscillation frequency by selecting a special DDS chip AD9834 of ADI company.
Preferably, the VCA8500 chip is internally provided with a fixed pre-amplifier circuit, a programmable attenuation circuit and a programmable gain amplifying circuit, so as to realize 46dB of dynamic gain control.
Preferably, when the local oscillator circuit works, the fixed frequency 6MHz is generated through the configuration of the single chip microcomputer to be mixed with a signal of a receiving end, then an I path signal and a Q path signal of a low frequency end are realized through a low-pass filter, then data acquisition is realized through a built-in ADC (analog to digital converter) of the single chip microcomputer, an NE602 type mixer of SIGNETICS company is selected as the mixer, the cut-off frequency of the low-pass filter is set to be 200kHz, and the low-pass filter is built through an operational amplifier to realize low-pass filtering of the signal.
Preferably, the processing circuit takes an FPGA and an MCU as control cores, the FPGA selects Artix series of XC7A100TCSG type FPGA chips of Xilinx company, and the MCU selects STM32F407 type singlechip of an artificial semiconductor.
Preferably, the transmitting circuit is composed of the following three parts:
the emission excitation signal generation circuit is used for realizing the originally required working frequency, working pulse width and working bandwidth;
the power amplifying circuit is used for converting a transmitting excitation signal from a digital PWM signal to an analog signal and converting power amplification to a high-voltage signal;
And the matching circuit is used for realizing the matching of capacitive reactance and inductive reactance between the transmitting circuit and the transducer and ensuring that the transmitting waveform is not distorted.
The invention has the following beneficial effects:
(1) The improved pipeline sonar adopts 6 sub-transducers uniformly distributed at equal angles on a circular surface on the design of a wet end, and can theoretically improve the detection efficiency by 6 times under the condition that other conditions are unchanged.
(2) The circuit design of the improved pipeline sonar wet end processing system is optimized, the sonar working frequency is improved to 6MHz, the horizontal and vertical angular resolutions of the improved pipeline sonar are 0.8 degrees, and the resolution is doubled compared with that of the traditional pipeline sonar.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a functional block diagram of the overall pipeline sonar of the present invention.
FIG. 2 is a schematic diagram of the operation of the conductive slip ring of the present invention.
Fig. 3 is a schematic diagram of the conductive slip ring wiring of the present invention, wherein (a) is a side sectional view, (b) is a side view, and (c) is a front sectional view.
Fig. 4 is a block diagram showing the internal structure of the AD8222 chip of the present invention.
Fig. 5 is a block diagram showing the internal structure of the VCA8500 chip according to the present invention.
FIG. 6 is a functional block diagram of a processing circuit according to the present invention.
Fig. 7 is a functional block diagram of a transmit circuit of the present invention.
In the figure, a 1-transducer, a 2-conductive slip ring, a stepping motor, a 3-receiving pretreatment circuit, a 4-processing circuit and a 5-transmitting circuit are shown.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 7, the embodiment of the invention provides a technical scheme of an improved pipeline sonar wet end processing device, which mainly comprises a transducer 1, a conductive slip ring, a stepping motor 2, a receiving pretreatment circuit 3, a processing circuit 4 and a transmitting circuit 5, wherein the processing circuit 4 is sequentially connected with the receiving pretreatment circuit 3, the conductive slip ring, the stepping motor 2 and the transducer 1, the processing circuit 4 is sequentially connected with the transmitting circuit 5, the conductive slip ring and the stepping motor 2, and the processing circuit 4 realizes the delivery of processed data and display control equipment through an ethernet interface.
The cross section of the shell of the transducer 1 is in a regular hexagon structure, six transducer probes are uniformly distributed on the circumferential surface of the shell of the transducer 1, and the transducer probes are driven by a stepping motor to rotate for more than 60 circles within 1 minute. The pipeline sonar transducer casing works under water at normal temperature, sealing rings and sealing glue are added between the metal and nonmetal covers, and the sealing joint is used for communicating an internal power supply and an external power supply of the instrument with signals. The transducer 1 consists of six probes which are respectively and uniformly distributed in a regular hexagon, and the probes are driven by a stepping motor to rotate and can rotate for more than 60 circles within 1 minute. The whole instrument is filled with light wax oil for heat dissipation.
As shown in fig. 2, the conductive slip ring is used for transmitting electric signals, meanwhile, the connection part of the conductive slip ring rotates relatively and can transmit electricity, wires cannot be wound, a stator end of the conductive slip ring is connected with a stepping motor to form a fixed part, and a rotor end drives transducers provided with six transducer probes.
As shown in fig. 3, the conductive slip ring adopts a custom-made mode and is designed with seven coils.
The stepping motor has large torque, low temperature rise, high consistency and circular design in structural design, and can save space.
The reception preprocessing circuit 3 is mainly composed of the following three parts:
The fixed amplifying circuit is an AD8222 dual-channel high-performance instrument amplifier, so that front-stage impedance matching and fixed gain amplification are realized, the dynamic range of the system is increased as much as possible, and the gain setting can be properly reduced by (10-20 dB). The AD8222 is packaged by adopting a small-sized 4mm multiplied by 4mm LFCSP, and the internal structure block diagram of the chip is shown in figure 4;
The voltage-controlled amplifying circuit selects an 8-channel ultra-low power consumption variable gain amplifier VCA8500 with a low noise preamplifier of TI company. As shown in FIG. 5, the internal functional block diagram of the chip is that a fixed pre-amplifier circuit, a programmable attenuation circuit and a programmable gain amplifying circuit are arranged in the VCA8500 chip to realize 46dB dynamic gain control;
The local oscillation circuit is used for realizing the generation of the local oscillation frequency by selecting a special DDS chip AD9834 of the ADI company, and realizing the generation of the local oscillation frequency by selecting a special DDS chip AD9834 of the ADI company, wherein the frequency of the AD9834 can be up to 37.5 MHz. The fixed frequency 6MHz is generated through the configuration of the singlechip and mixed with the signal of the receiving end, then the I-path signal and the Q-path signal of the low-frequency end are realized through the low-pass filter, and then the data acquisition is realized through the built-in ADC of the singlechip. The mixer is an NE602 type mixer manufactured by SIGNETICS, the cut-off frequency of the low-pass filter is set to be 200kHz, and the low-pass filter is built through the operational amplifier to realize low-pass filtering of signals.
As shown in FIG. 6, the processing circuit 4 uses an FPGA and an MCU as control cores, wherein the FPGA uses a Artix series of XC7A100TCSG FPGA chip from Xilinx company, and the MCU uses a STM32F407 singlechip of an artificial semiconductor.
As shown in fig. 7, the transmitting circuit 5 is composed of a transmitting excitation signal generating circuit, a power amplifying circuit and a matching circuit, and the transmitting excitation signal generating circuit mainly realizes the originally required operating frequency, operating pulse width and operating bandwidth. The main function of the power amplification circuit is to convert the emission excitation signal from a digital PWM signal to an analog signal and then to convert the power amplification into a high-voltage signal. The matching circuit mainly realizes the matching of capacitive reactance and inductive reactance between the transmitting circuit and the transducer and ensures that the transmitting waveform is not distorted.
The foregoing embodiments are merely for illustrating the technical solution of the present invention, but not for limiting the same, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiments or equivalents may be substituted for parts of the technical features thereof, and that such modifications or substitutions do not depart from the spirit and scope of the technical solution of the embodiments of the present invention in essence.
Claims (3)
1. The improved pipeline sonar wet end processing device is characterized by mainly comprising a transducer, a conductive slip ring, a stepping motor, a receiving pretreatment circuit, a processing circuit and a transmitting circuit, wherein the processing circuit is sequentially connected with the receiving pretreatment circuit, the conductive slip ring, the stepping motor and the transducer, the processing circuit is sequentially connected with the transmitting circuit, the conductive slip ring and the stepping motor, and the processing circuit realizes interaction between processed data and display control equipment through an Ethernet interface;
Six transducer probes are uniformly distributed on the circumferential surface of the shell of the transducer, and the transducer probes are driven by the stepping motor to rotate for more than 60 circles within 1 minute;
Seven coils are arranged on the conductive slip ring;
the receiving preprocessing circuit mainly comprises a fixed amplifying circuit, a voltage-controlled amplifying circuit and a local oscillation circuit:
When the local oscillator circuit works, a fixed frequency of 6MHz is generated through the configuration of a single chip microcomputer to be mixed with a signal of a receiving end, an I path signal and a Q path signal of a low frequency end are realized through a low-pass filter, and data acquisition is realized through an internal ADC (analog-to-digital converter) of the single chip microcomputer, wherein the cut-off frequency of the low-pass filter is set to be 200kHz, and the low-pass filter is built through an operational amplifier to realize low-pass filtering of the signal;
The processing circuit takes an FPGA and an MCU as control cores;
The processing device improves the sonar working frequency to 6MHz, and realizes the horizontal and vertical angular resolution of 0.8 DEG for the improved pipeline sonar;
The conductive slip ring is used for transmitting electric signals, meanwhile, the connection part of the conductive slip ring rotates relatively and can transmit electricity, wires cannot be wound, the stator end of the conductive slip ring is connected with the stepping motor to form a fixed part, and the rotor end drives transducers with six transducer probes.
2. The improved pipeline sonar wet end processing device as defined in claim 1, wherein said stepper motor has a high torque, a low temperature rise, a numerical control winding, a high consistency and a circular design in structural design.
3. An improved pipeline sonar wet end processing device as defined in claim 1, wherein said transmitting circuit is comprised of three parts:
the emission excitation signal generation circuit is used for realizing the originally required working frequency, working pulse width and working bandwidth;
the power amplifying circuit is used for converting a transmitting excitation signal from a digital PWM signal to an analog signal and converting power amplification to a high-voltage signal;
And the matching circuit is used for realizing the matching of capacitive reactance and inductive reactance between the transmitting circuit and the transducer and ensuring that the transmitting waveform is not distorted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211571564.1A CN116293473B (en) | 2022-12-08 | 2022-12-08 | Improved generation pipeline sonar wet end processing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211571564.1A CN116293473B (en) | 2022-12-08 | 2022-12-08 | Improved generation pipeline sonar wet end processing apparatus |
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| Publication Number | Publication Date |
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| CN116293473A CN116293473A (en) | 2023-06-23 |
| CN116293473B true CN116293473B (en) | 2025-08-01 |
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| CN202211571564.1A Active CN116293473B (en) | 2022-12-08 | 2022-12-08 | Improved generation pipeline sonar wet end processing apparatus |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747190A (en) * | 2020-12-31 | 2021-05-04 | 中国人民解放军92578部队 | Pipeline array ultrasonic internal detection structure |
| CN112799077A (en) * | 2021-04-14 | 2021-05-14 | 武汉中岩科技股份有限公司 | Sonar detecting system based on water pipeline |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8853918B2 (en) * | 2011-09-22 | 2014-10-07 | General Electric Company | Transducer structure for a transducer probe and methods of fabricating same |
| CN202975321U (en) * | 2012-12-10 | 2013-06-05 | 广州市中海达测绘仪器有限公司 | Multi-beam acoustic measuring system |
| AU2014293274B2 (en) * | 2013-07-23 | 2018-11-01 | Butterfly Network, Inc. | Interconnectable ultrasound transducer probes and related methods and apparatus |
| JP6513674B2 (en) * | 2013-08-27 | 2019-05-15 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | Dual mode CMUT transducer |
| CN204882475U (en) * | 2015-08-20 | 2015-12-16 | 云南电网有限责任公司电力科学研究院 | Electromagnetism ultrasonic transducer |
| WO2017149421A1 (en) * | 2016-03-03 | 2017-09-08 | Koninklijke Philips N.V. | Ultrasonic cmut transducer array with improved depth of field |
| CN108490069A (en) * | 2018-01-30 | 2018-09-04 | 天津大学 | Two phase flow distributed constant dual mode ultrasound visual measuring device |
| KR20220038094A (en) * | 2019-07-17 | 2022-03-25 | 티코나 엘엘씨 | ultrasonic probe |
| CN113048329A (en) * | 2021-03-06 | 2021-06-29 | 苏州普莱瑞检测科技有限公司 | Piezoelectric ultrasonic detection probe joint for oil pipeline and detector in pipeline |
| CN115166705A (en) * | 2022-08-11 | 2022-10-11 | 谷乾坤 | High-precision multi-frequency parallel acquisition sonar probe design |
| CN115419838A (en) * | 2022-08-19 | 2022-12-02 | 武汉博海深衡科技有限公司 | Underwater pipeline sonar detection system and method |
-
2022
- 2022-12-08 CN CN202211571564.1A patent/CN116293473B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747190A (en) * | 2020-12-31 | 2021-05-04 | 中国人民解放军92578部队 | Pipeline array ultrasonic internal detection structure |
| CN112799077A (en) * | 2021-04-14 | 2021-05-14 | 武汉中岩科技股份有限公司 | Sonar detecting system based on water pipeline |
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