Online detection system for differential settlement of steel pipe pole

Abstract

The utility model provides a steel pipe pole differential settlement on-line detection system which comprises a detected steel pipe pole, a cable, a guided wave transducer, a guided wave on-line detection instrument box and a multi-channel low-power-consumption guided wave instrument, and the guided wave on-line detection instrument box is fixedly installed on the ground where the detected steel pipe pole is located. The multi-channel low-power-consumption guided wave instrument is fixedly installed in the guided wave online detection instrument box and electrically connected with the guided wave transducer through a cable, the guided wave transducer comprises a fixing bolt, a settlement detection sensor and a fixing clamp, the settlement detection sensor is arranged on the fixing clamp and fixedly installed on a detected steel pipe pole through the fixing bolt, and the fixed clamp is fixedly connected with the guide wave online detection instrument box. The technical problem of reliable detection of the differential settlement of the steel pipe pole is solved, and particularly, the differential settlement of the steel pipe pole can be effectively detected by utilizing a guided wave technology and adopting a pulse echo mode.

Description

Technical Field

[0001] The utility model relates to the technical field of on-line detection of uneven settlement of steel pipe poles, and particularly relates to an on-line detection system for uneven settlement of steel pipe poles. Background Art

[0002] The power system is one of the important pillars of modern society, and the integrity of power transmission lines and their supporting structures is crucial for ensuring the stable operation of the power system. As a common supporting structure in transmission lines, the safe operation state of steel pipe poles is directly related to the reliability and stability of the power grid. Uneven settlement is a common problem encountered by steel pipe poles, which can lead to a decrease in structural bearing capacity, and even cause tower inclination and damage, seriously threatening the safe operation of transmission lines. Therefore, it is particularly important to develop an accurate and efficient on-line detection system for uneven settlement of steel pipe poles.

[0003] Traditional methods for detecting uneven settlement of steel pipe poles mainly include visual inspection, spirit level measurement, inclinometer monitoring, etc.: (1) Visual inspection: relying on manual experience for naked-eye observation, it is simple and intuitive, but is easily affected by subjective factors, with low accuracy and reliability; (2) Spirit level measurement: using tools such as spirit levels and theodolites for on-site measurement, it can provide relatively accurate data, but the operation is cumbersome, the efficiency is low, and it has high requirements for environmental conditions; (3) Inclinometer monitoring: monitoring the inclination change through an inclinometer installed on the pole body, it can achieve a certain degree of automation and continuous monitoring, but the cost is high, and the initial installation accuracy requirements are high.

[0004] At present, the environment where steel pipe poles are located is complex and changeable, and the environment puts higher requirements on the stability and accuracy of detection technologies. In addition, the technical requirements of operation and human factors are also problems that need to be overcome when improving detection efficiency and accuracy. Therefore, it is of great significance to study a detection method with high efficiency, low cost and non-destructive.

[0005] In view of the various limitations of the above traditional methods, the guided wave detection technology has become a technology with broad application prospects due to its unique advantages: (1) High sensitivity: The guided wave detection technology has extremely high sensitivity to tiny defects and anomalies, and can detect potential risks at an early stage; (2) Wide range coverage: Through the guided wave technology, the detection of the internal state of a large range can be realized, without the need to detect each specific position separately, greatly improving the detection efficiency; (3) Non-destructive detection: The guided wave detection is a non-destructive detection method and will not cause damage to the steel pipe pole itself, which is suitable for periodic or continuous on-line monitoring; (4) Strong applicability: The guided wave detection technology is not limited by the detection environment and can be detected even under harsh weather conditions, ensuring the continuity and stability of the detection work.

[0006] In summary, the on-line detection system for uneven settlement of electric steel pipe poles based on guided wave technology can not only provide efficient and accurate detection results, but also has the advantages of simple operation and low cost. It is an effective supplement and improvement to traditional detection methods and is of great significance for ensuring the stable operation of the power transmission system.

[0007] Therefore, the existing technology still needs to be further developed. Summary of the Invention

[0008] The purpose of the present utility model is to overcome the above technical deficiencies and provide an on-line detection system for uneven settlement of steel pipe poles to solve the problems existing in the prior art.

[0009] To achieve the above technical objectives, the present utility model provides an on-line detection system for uneven settlement of steel pipe poles, which includes a steel pipe pole to be measured, a cable, a guided wave transducer, a guided wave on-line detection instrument box, and a multi-channel low-power guided wave instrument;

[0010] The guided wave on-line detection instrument box is fixedly installed on the ground where the steel pipe pole to be measured is located. The multi-channel low-power guided wave instrument is fixedly installed inside the guided wave on-line detection instrument box. The multi-channel low-power guided wave instrument is electrically connected to the guided wave transducer through a cable;

[0011] The guided wave transducer includes a fixing bolt, a settlement detection sensor, and a fixing clamp. The settlement detection sensor is arranged on the fixing clamp, and the settlement detection sensor is fixedly installed on the steel pipe pole to be measured through the fixing bolt.

[0012] Specifically, the steel pipe pole to be measured includes a first steel pipe pole to be measured and a second steel pipe pole to be measured. The guided wave transducer includes a first guided wave transducer and a second guided wave transducer. The first steel pipe pole to be measured and the second steel pipe pole to be measured are respectively fixedly connected to one end of a fixing rod. After connection, the included angle formed by the straight line where the first steel pipe pole to be measured is located and the straight line where the second steel pipe pole to be measured is located is within a first preset range.

[0013] Specifically, the multi-channel low-power guided wave instrument is electrically connected to the guided wave transducer through a cable, including:

[0014] The multi-channel low-power guided wave instrument includes a multi-channel interface circuit. The multi-channel interface circuit is electrically connected to the first guided wave transducer and the second guided wave transducer through a cable respectively.

[0015] Specifically, the settlement detection sensor is fixedly installed on the steel pipe pole to be measured through the fixing bolt, including:

[0016] The settlement detection sensor in the first guided wave transducer is fixedly installed on the first steel pipe pole to be measured through the fixing bolt;

[0017] The settlement detection sensor inside the second guided wave transducer is fixedly installed on the second steel pipe pole to be measured through fixing bolts.

[0018] Specifically, the multi-channel low-power guided wave instrument includes a solar power supply module and a power supply switch;

[0019] The solar power supply module is electrically connected to the power supply switch, and the solar power supply module is used to supply power to the entire on-line detection system.

[0020] Specifically, the multi-channel low-power guided wave instrument further includes: a system reset circuit, an interface display module, a central control circuit, and a human-computer interaction control circuit;

[0021] The human-computer interaction control circuit is electrically connected to the power supply switch, the system reset circuit, the interface display module, and the central control circuit respectively;

[0022] The interface display module is a liquid crystal display screen, the human-computer interaction control circuit is an embedded ARM circuit board, and the central control circuit is a DSP control circuit board.

[0023] Specifically, the multi-channel low-power guided wave instrument further includes a signal source circuit and a power amplification circuit;

[0024] The signal source circuit is electrically connected to the central control circuit and the power amplification circuit respectively, and the signal source circuit is a direct digital frequency synthesis signal circuit.

[0025] Specifically, the multi-channel low-power guided wave instrument further includes a signal filtering circuit, a signal amplification circuit, and a multi-channel interface circuit;

[0026] The multi-channel interface circuit is electrically connected to the power amplification circuit and the signal amplification circuit respectively, and the signal filtering circuit is electrically connected to the signal amplification circuit.

[0027] Specifically, the multi-channel low-power guided wave instrument further includes an ADC acquisition circuit;

[0028] The ADC acquisition circuit is electrically connected to the signal filtering circuit and the human-computer interaction control circuit respectively, and the ADC acquisition circuit is a 16-bit acquisition circuit with a sampling frequency of 1 MHz.

[0029] Specifically, the multi-channel low-power guided wave instrument further includes a cloud server and a communication and positioning module;

[0030] The cloud server is electrically connected to the human-computer interaction control circuit, and the cloud server is communicatively connected to the communication and positioning module through a 4G network;

[0031] The communication and positioning module includes a 4G communication module and a Beidou positioning module. The communication and positioning module transmits Beidou positioning information and guided wave signals to the cloud server through the TCP / IP protocol.

[0032] Advantages:

[0033] The utility model provides a steel pipe pole uneven settlement detection system integrated with guided wave technology, which specifically includes a steel pipe pole to be measured, a cable, a guided wave transducer, a guided wave on-line detection instrument box, and a multi-channel low-power guided wave instrument. The guided wave on-line detection instrument box is fixedly installed on the ground where the steel pipe pole to be measured is located. The multi-channel low-power guided wave instrument is fixedly installed inside the guided wave on-line detection instrument box and is electrically connected to the guided wave transducer through a cable. The guided wave transducer includes a fixing bolt, a settlement detection sensor, and a fixing clamp. The settlement detection sensor is arranged on the fixing clamp and is fixedly installed on the steel pipe pole to be measured through the fixing bolt, solving the technical problem of reliable detection of uneven settlement of steel pipe poles. In particular, by using the guided wave technology in the pulse echo mode, the detection of uneven settlement of steel pipe poles can be effectively realized. Compared with traditional detection methods, the utility model has the following advantages:

[0034] (1) The detection efficiency is improved. The guided wave detection technology can cover long-distance steel pipe poles in a short time, realizing rapid and comprehensive detection. Compared with the traditional point-by-point detection method, the detection efficiency is greatly improved, and the detection cost is saved.

[0035] (2) The guided wave detection is a non-contact and non-destructive detection, which will not cause any damage to the structure of the steel pipe pole, ensuring the integrity and long-term use performance of the power facilities, greatly reducing the risk in the detection process, and largely improving the safety and reliability of the utility model.

[0036] (3) Early defect warning can be carried out. Since the guided wave detection has high sensitivity to non-uniformity, it can accurately identify and locate problems at the early stage of settlement formation, thus providing the possibility for early intervention and maintenance, and greatly improving the stability and safety of the power transmission system.

[0037] (4) It has strong environmental adaptability. The guided wave detection technology is not restricted by environmental conditions, greatly expanding the application scenarios of the utility model. Description of the Drawings

[0038] Figure 1 is a schematic structural diagram of the on-line detection system for uneven settlement of steel pipe poles provided in the specific embodiment of the utility model;

[0039] Figure 2 is a schematic composition diagram of the multi-channel low-power guided wave instrument provided in the specific embodiment of the utility model;

[0040] Figure 3 is a longitudinal sectional view of the guided wave transducer provided in the specific embodiment of the present utility model;

[0041] Figure 4 is a transverse sectional view of the guided wave transducer provided in the specific embodiment of the present utility model;

[0042] Figure 5 is a schematic structural diagram of the steel pipe pole with uneven settlement on the right side provided in the specific embodiment of the present utility model;

[0043] Figure 6 is a schematic structural diagram of the steel pipe pole with uneven settlement on the left side provided in the specific embodiment of the present utility model;

[0044] Figure 7 is a detection signal diagram of the steel pipe pole without uneven settlement provided in the specific embodiment of the present utility model;

[0045] Figure 8 is a detection signal diagram of the steel pipe pole with uneven settlement on the right side provided in the specific embodiment of the present utility model;

[0046] Figure 9 is a detection signal diagram of the steel pipe pole with uneven settlement on the left side provided in the specific embodiment of the present utility model;

[0047] Among them, the above-mentioned drawings include the following reference numerals:

[0048] 1. First steel pipe pole to be measured; 2. Second steel pipe pole to be measured; 3. Cable; 4. Earth; 5. Second guided wave transducer; 6. First guided wave transducer; 7. Guided wave on-line detection instrument box; 8. Multi-channel low-power guided wave instrument; 9. Fixed bolt; 10. Settlement detection sensor; 11. Fixed clamp; 12. Steel pipe pole to be measured; 13. Fixed rod. Specific embodiment

[0049] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be clearly and completely described below in conjunction with the drawings of the present utility model. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without making creative efforts shall all fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0050] The present utility model will be further described below in conjunction with the drawings and preferred embodiments.

[0051] Please refer to Figures 1 - 4, this embodiment provides an on-line detection system for uneven settlement of steel pipe poles. The system includes a steel pipe pole 12 to be measured, a cable 3, a guided wave transducer, a guided wave on-line detection instrument box 7, and a multi-channel low-power guided wave instrument 8;

[0052] The guided wave on-line detection instrument box 7 is fixedly installed on the ground 4 where the steel pipe pole 12 to be measured is located. The multi-channel low-power guided wave instrument 8 is fixedly installed inside the guided wave on-line detection instrument box 7. The multi-channel low-power guided wave instrument 8 is electrically connected to the guided wave transducer through the cable 3;

[0053] The guided wave transducer includes a fixing bolt 9, a settlement detection sensor 10, and a fixing clamp 11. The settlement detection sensor 10 is arranged on the fixing clamp 11. The settlement detection sensor 10 is fixedly installed on the steel pipe pole 12 to be measured through the fixing bolt 9.

[0054] It can be understood that a first preset interval is set in advance. The present invention does not further limit the specific value of the first preset interval, as long as it can adapt to the on-line detection system for uneven settlement of the steel pipe poles described in the present invention.

[0055] Preferably, the present invention sets the first preset interval to be between 20 degrees and 100 degrees. The above setting of the included angle can further ensure that there is sufficient supporting force between the steel pipe poles, and greatly improve the stability and accuracy of the structure.

[0056] Specifically, the steel pipe pole 12 to be measured includes a first steel pipe pole 1 to be measured and a second steel pipe pole 2 to be measured. The guided wave transducer includes a first guided wave transducer 6 and a second guided wave transducer 5. The first steel pipe pole 1 to be measured and the second steel pipe pole 2 to be measured are respectively fixedly connected to one end of a fixing rod 13. After connection, the included angle formed by the straight line where the first steel pipe pole 1 to be measured is located and the straight line where the second steel pipe pole 2 to be measured is located is within the first preset interval.

[0057] It should be further noted that the settlement detection sensor is a sandwich - type piezoelectric sensor, and the piezoelectric material used is single - crystal piezoelectric ceramic. The single - crystal piezoelectric ceramic has a uniform crystal structure, which means that its electrical and mechanical properties are consistent in all directions, capable of providing highly accurate and consistent signal responses. Moreover, the single - crystal material has a higher piezoelectric effect compared to polycrystalline materials, that is, it can generate a larger charge change when subjected to pressure changes, enabling the sensor to detect even more minute settlement changes, featuring high sensitivity. When the temperature changes, the performance of the single - crystal piezoelectric ceramic material changes less, ensuring the stability and reliability of the sensor under different environmental conditions. Preferably, the number of settlement detection sensors on the fixed fixture is set to 6, which can cover a wider area, ensuring comprehensive monitoring of the settlement status of the entire structure or the ground. Through the comparison and analysis of multi - point data, the accuracy and reliability of settlement detection are further improved, greatly reducing the errors that may be brought by a single sensor, and largely ensuring the continuity and stability of the detection work.

[0058] Specifically, the multi - channel low - power guided - wave instrument 8 is electrically connected to the guided - wave transducer through the cable 3, and includes:

[0059] The multi - channel low - power guided - wave instrument 8 includes a multi - channel interface circuit, and the multi - channel interface circuit is electrically connected to the first guided - wave transducer 6 and the second guided - wave transducer 5 through the cable 3 respectively.

[0060] Furthermore, the guided - wave detection frequency is preferably 80 kHz, which can further improve the detection resolution: it can more precisely detect the changes of minute defects. At the same detection distance, higher - frequency guided waves can provide higher spatial resolution, helping to more accurately locate the position of settlement, and greatly improving the detection efficiency.

[0061] Specifically, the settlement detection sensor 10 is fixedly installed on the measured steel pipe pole through the fixing bolt 9, and includes:

[0062] The settlement detection sensor 10 in the first guided - wave transducer 6 is fixedly installed on the first measured steel pipe pole 1 through the fixing bolt 9;

[0063] The settlement detection sensor 10 in the second guided - wave transducer 5 is fixedly installed on the second measured steel pipe pole 2 through the fixing bolt 9.

[0064] Specifically, the multi - channel low - power guided - wave instrument 8 includes a solar power supply module and a power supply switch;

[0065] The solar power supply module is electrically connected to the power supply switch, and the solar power supply module is used to supply power to the entire on - line detection system.

[0066] Specifically, the multi-channel low-power waveguide instrument 8 further includes: a system reset circuit, an interface display module, a central control circuit, and a human-computer interaction control circuit;

[0067] The human-computer interaction control circuit is electrically connected to the power supply switch, the system reset circuit, the interface display module, and the central control circuit respectively;

[0068] The interface display module is a liquid crystal display screen, the human-computer interaction control circuit is an embedded ARM circuit board, and the central control circuit is a DSP control circuit board.

[0069] It can be understood that the system reset circuit is a minimum computer system circuit, which can realize the restart of the detection system. The interface display module is preferably a seven-inch liquid crystal display screen circuit, which can be applied to various application scenarios, facilitating users to read and operate. Moreover, the liquid crystal display technology is more energy-efficient than the traditional display technology. The seven-inch liquid crystal display screen circuit is usually designed with standard interfaces, which is convenient for integration with other subsystems, simplifies the design and installation process, can provide high-quality display effects and user interaction experiences, and has good market adaptability and energy-saving characteristics.

[0070] Furthermore, taking the embedded ARM circuit board as the human-computer interaction control circuit, the ARM processor has high performance and low-power characteristics, is suitable for embedded systems, can provide a smooth user interface and efficient data processing capabilities. The ARM circuit board usually integrates various interfaces, such as USB, Ethernet, LCD display, etc., which provides flexible expandability and convenient human-computer interaction methods for the detection system.

[0071] Furthermore, taking the DSP control circuit board as the central control circuit, the DSP chip is good at performing complex mathematical operations and is suitable for processing signal processing tasks in the monitoring system, such as filtering, fast Fourier transform (FFT), etc. It can provide high-speed data processing performance while maintaining low power consumption, further improving the real-time acquisition and processing of monitoring data.

[0072] Specifically, the multi-channel low-power waveguide instrument 8 further includes a signal source circuit and a power amplification circuit;

[0073] The signal source circuit is electrically connected to the central control circuit and the power amplification circuit respectively, and the signal source circuit is a direct digital frequency synthesis signal circuit.

[0074] It should be further noted that the direct digital frequency synthesis (DDS) signal circuit can achieve precise frequency output and fast frequency switching time. Since DDS is digitally controlled, it can complete frequency switching in an extremely short time, greatly improving the performance of the on-line detection system, especially in terms of precise frequency control and fast response. At the same time, it also contributes to system integration, miniaturization, and cost control.

[0075] Specifically, the multi-channel low-power waveguide instrument 8 further includes a signal filtering circuit, a signal amplification circuit, and a multi-channel interface circuit;

[0076] The multi-channel interface circuit is electrically connected to the power amplification circuit and the signal amplification circuit respectively, and the signal filtering circuit is electrically connected to the signal amplification circuit.

[0077] Specifically, the multi-channel low-power waveguide instrument 8 further includes an ADC acquisition circuit;

[0078] The ADC acquisition circuit is electrically connected to the signal filtering circuit and the human-computer interaction control circuit respectively. The ADC acquisition circuit is a 16-bit acquisition circuit with a sampling frequency of 1 MHz.

[0079] It can be understood that the ADC acquisition circuit is a 16-bit analog-to-digital converter acquisition circuit, and its resolution determines the smallest change in the analog signal that can be detected. A 16-bit resolution means that it can distinguish 2¹ 6 different signal levels. The sampling frequency is 1 MHz, that is, the acquisition circuit can complete the conversion from analog signal to digital signal within each microsecond, further improving the detection sensitivity and detection efficiency.

[0080] Specifically, the multi-channel low-power waveguide instrument 8 further includes a cloud server and a communication and positioning module;

[0081] The cloud server is electrically connected to the human-computer interaction control circuit, and the cloud server is communicatively connected to the communication and positioning module through a 4G network;

[0082] The communication and positioning module includes a 4G communication module and a Beidou positioning module. The communication and positioning module transmits the Beidou positioning information and the waveguide signal to the cloud server through the TCP / IP protocol.

[0083] It can be understood that after the waveguide transducer receives an external excitation, it converts the external excitation into mechanical vibration through the piezoelectric effect, thereby generating a waveguide signal in the steel pipe pole 12 to be measured. The high-speed data transmission ability of the 4G communication module ensures that the Beidou positioning information and the waveguide signal can be uploaded to the cloud server in real time and quickly, improving the response speed and data processing efficiency of the monitoring system. The TCP / IP protocol ensures the reliability of data transmission, can automatically process the fragmentation, recombination and error detection of data packets, ensuring the integrity and accuracy of data. The cloud server realizes remote monitoring and management, further improving the detection accuracy, reliability and safety of the present invention.

[0084] The working process of the present invention will be described below through specific examples:

[0085] The utility model relates to an on-line detection system for uneven settlement of steel pipe poles integrated with guided wave technology. The system aims to accurately monitor the uneven settlement problem of power steel pipe poles through specific waveform analysis technology to early warn of structural or functional defects.

[0086] The direction of the measured steel pipe pole closer to the guided wave on-line detection instrument box 7, that is, the direction where the second measured steel pipe pole 2 is located, is represented as the left side, and the direction of the measured steel pipe pole farther from the guided wave on-line detection instrument box 7, that is, the direction where the first measured steel pipe pole 1 is located, is represented as the right side.

[0087] Please refer to Figure 1 , when the measured steel pipe pole 12 does not have the situation of uneven settlement, the buried parameters of the measured steel pipe pole 12 are measured: the distances from the second guided wave transducer 5 and the first guided wave transducer 6 to the interface of the ground 4 are both 17.40 dm (decimeters).

[0088] The following uses the device of the utility model to test the detection effect:

[0089] The ultrasonic excitation and reception parameters are set by using the human-computer interaction control circuit. The excitation frequency of the ultrasonic wave is 80 kHz, and the used excitation signal is a cosine signal modulated by a 3-cycle Hanning window. After obtaining the original guided wave excitation signal through the central control circuit and the signal source circuit, the original guided wave excitation signal is amplified by the power amplification circuit and then loaded onto the first guided wave transducer 6 and the second guided wave transducer 5 through the multi-channel interface circuit, so as to generate guided wave signals in the first measured steel pipe pole 1 and the second measured steel pipe pole 2. During the propagation of the guided wave signals, when encountering the interface of the ground 4, signal reflection occurs, and the reflected signals are further obtained through the signal amplification circuit, the signal filtering circuit and the ADC acquisition circuit to obtain two-way guided wave detection signals (1 signal for each of the first guided wave transducer 6 and the second guided wave transducer 5), as Figure 7 shown, and are transmitted to the cloud server through the communication and positioning module to obtain the uneven settlement and positioning situation of the power steel pipe pole, as Figure 7 The upper and lower signal diagrams in are the guided wave signals obtained by the second guided wave transducer 5 and the first guided wave transducer 6 respectively. The echo signals of the ground 4 interface in the figure are both 17.38 dm (the measurement error from the actual value of 17.40 dm is only 0.02 dm, within the acceptable range), indicating that the heights of the first guided wave transducer 6 and the second guided wave transducer 5 from the ground 4 are the same, so there is no phenomenon of uneven settlement.

[0090] Please refer to Figure 5 , when the measured steel pipe pole 12 has the situation of uneven settlement on the right side, the buried parameters of the measured steel pipe pole 12 are measured: the distances from the second guided wave transducer 5 and the first guided wave transducer 6 to the interface of the ground 4 are 17.40 dm and 15.8 dm respectively.

[0091] The following is to test the detection effect using the device of the present utility model:

[0092] The ultrasonic excitation and reception parameters are set by the human-machine interaction control circuit. The excitation frequency of the ultrasonic wave is 80 kHz, and the excitation signal used is a cosine signal modulated by a 3-cycle Hanning window. After passing through the central control circuit and the signal source circuit, the original guided wave excitation signal is obtained. After being amplified by the power amplification circuit, the original guided wave excitation signal is then loaded onto the first guided wave transducer 6 and the second guided wave transducer 5 through the multi-channel interface circuit, thereby generating a guided wave signal in the first measured steel pipe pole 1 and the second measured steel pipe pole 2. During the propagation of this guided wave signal, when it encounters the interface of the ground 4, signal reflection occurs. The reflected signal is further processed by the signal amplification circuit, the signal filtering circuit, and the ADC acquisition circuit to obtain two-way guided wave detection signals (one signal for each of the first guided wave transducer 6 and the second guided wave transducer 5), as Figure 8 shown, and is transmitted to the cloud server through the communication and positioning module to obtain the uneven settlement and positioning conditions of the power steel pipe pole, as Figure 8 The upper and lower signal diagrams in are the guided wave signals obtained by the second guided wave transducer 5 and the first guided wave transducer 6 respectively. The echo signals of the ground 4 interface in the figure are 17.38 dm and 15.78 dm respectively (the measurement errors from the actual values of 17.40 dm and 15.8 dm are both 0.02 dm, within the acceptable range), indicating that the height of the second guided wave transducer 5 from the ground is higher than that of the first guided wave transducer 6 from the ground 4. Therefore, it shows that the measured steel pipe pole 12 has uneven settlement, and the settlement occurs on the right side. At the same time, the system gives the longitude and latitude information of the positioning of the steel pipe pole.

[0093] Please refer to Figure 6 , for the case of uneven settlement on the left side of the measured steel pipe pole 12, the buried parameters of the measured steel pipe pole 12 are measured: the distances from the second guided wave transducer 5 and the first guided wave transducer 6 to the interface of the ground 4 are 17.40 dm and 18.30 dm respectively.

[0094] The following is to test the detection effect using the device of the present utility model:

[0095] The ultrasonic excitation and reception parameters are set by the human-machine interaction control circuit. The excitation frequency of the ultrasonic wave is 80 kHz, and the excitation signal used is a cosine signal modulated by a 3-cycle Hanning window. After passing through the central control circuit and the signal source circuit, the original guided wave excitation signal is obtained. After being amplified by the power amplification circuit, the original guided wave excitation signal is then loaded onto the first guided wave transducer 6 and the second guided wave transducer 5 through the multi-channel interface circuit, thereby generating a guided wave signal in the first measured steel pipe pole 1 and the second measured steel pipe pole 2. During the propagation of this guided wave signal, when it encounters the interface of the ground 4, signal reflection occurs. The reflected signal is further processed by the signal amplification circuit, the signal filtering circuit, and the ADC acquisition circuit to obtain two-way guided wave detection signals (one signal for each of the first guided wave transducer 6 and the second guided wave transducer 5), asFigure 9 As shown, the uneven settlement and positioning of the electric steel pipe pole are obtained by the communication and positioning module and transmitted to the cloud server. For example, Figure 9 The upper and lower signal diagrams are the guided wave signals obtained by the second guided wave transducer 5 and the first guided wave transducer 6 respectively. The echo signals at the interface of the ground 4 in the figure are 17.39 dm and 18.32 dm respectively (the measurement errors from the actual values of 17.40 dm and 18.30 dm are 0.01 dm and 0.02 dm respectively, within the acceptable range), indicating that the height of the second guided wave transducer 5 from the ground 4 is lower than that of the first guided wave transducer 6 from the ground 4. Therefore, it shows that the measured steel pipe pole 12 has uneven settlement, and the settlement occurs on the left side. At the same time, the system gives the positioning longitude and latitude information of the steel pipe pole.

[0096] It should be noted here that the present utility model provides a steel pipe pole uneven settlement detection system integrated with guided wave technology, specifically including a measured steel pipe pole, a cable, a guided wave transducer, a guided wave on-line detection instrument box, and a multi-channel low-power guided wave instrument. The guided wave on-line detection instrument box is fixedly installed on the ground where the measured steel pipe pole is located. The multi-channel low-power guided wave instrument is fixedly installed inside the guided wave on-line detection instrument box and is electrically connected to the guided wave transducer through a cable. The guided wave transducer includes a fixing bolt, a settlement detection sensor, and a fixing clamp. The settlement detection sensor is arranged on the fixing clamp and is fixedly installed on the measured steel pipe pole through the fixing bolt, solving the technical problem of reliable detection of the uneven settlement of the steel pipe pole. Especially by using the guided wave technology in the pulse echo mode, it can effectively realize the detection of the uneven settlement of the steel pipe pole. Compared with the traditional detection method, the present utility model has the following beneficial effects:

[0097] (1) The detection efficiency is improved. The guided wave detection technology can cover long-distance steel pipe poles in a short time, realizing rapid and comprehensive detection. Compared with the traditional point-by-point detection method, the detection efficiency is greatly improved, and the detection cost is saved.

[0098] (2) The guided wave detection is non-contact and non-destructive, and will not cause any damage to the structure of the steel pipe pole, ensuring the integrity and long-term use performance of the power facilities, greatly reducing the risk in the detection process, and largely improving the safety and reliability of the present utility model.

[0099] (3) Early defect warning can be carried out. Since the guided wave detection has high sensitivity to unevenness, it can accurately identify and locate problems at the early stage of settlement formation, thus providing the possibility for early intervention and maintenance, and greatly improving the stability and safety of the power transmission system.

[0100] (4) It has strong environmental adaptability. The guided wave detection technology is not restricted by environmental conditions, and largely expands the application scenarios of the present utility model.

[0101] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, as long as there is no contradiction in such a combination.

[0102] The specific implementation manners of the present utility model described above do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included within the protection scope of the claims of the present utility model.

Claims

1. An on-line detection system for uneven settlement of steel pipe poles, characterized in that, The system includes a steel pipe pole to be measured (12), a cable (3), a guided wave transducer, an in-line guided wave detection instrument box (7), and a multi-channel low-power guided wave instrument (8). The in-line guided wave detection instrument box (7) is fixedly installed on the ground (4) where the steel pipe pole to be measured (12) is located. The multi-channel low-power guided wave instrument (8) is fixedly installed inside the in-line guided wave detection instrument box (7). The multi-channel low-power guided wave instrument (8) is electrically connected to the guided wave transducer through the cable (3). The guided wave transducer includes a fixing bolt (9), a settlement detection sensor (10), and a fixing fixture (11). The settlement detection sensor (10) is arranged on the fixing fixture (11), and the settlement detection sensor (10) is fixedly installed on the steel pipe pole to be measured (12) through the fixing bolt (9).

2. The on-line detection system for uneven settlement of steel pipe poles according to claim 1, wherein The steel pipe pole to be measured (12) includes a first steel pipe pole to be measured (1) and a second steel pipe pole to be measured (2). The guided wave transducer includes a first guided wave transducer (6) and a second guided wave transducer (5). The first steel pipe pole to be measured (1) and the second steel pipe pole to be measured (2) are respectively fixedly connected to one end of a fixing rod (13). After connection, the included angle formed by the straight line where the first steel pipe pole to be measured (1) is located and the straight line where the second steel pipe pole to be measured (2) is located is within a first preset range.

3. The on-line detection system for uneven settlement of steel pipe poles according to claim 2, characterized in that, The multi-channel low-power guided wave instrument (8) is electrically connected to the guided wave transducer through the cable (3), including: The multi-channel low-power guided wave instrument (8) includes a multi-channel interface circuit. The multi-channel interface circuit is electrically connected to the first guided wave transducer (6) and the second guided wave transducer (5) respectively through the cable (3).

4. The on-line detection system for uneven settlement of steel pipe poles according to claim 3, characterized in that, The settlement detection sensor (10) is fixedly installed on the steel pipe pole to be measured through the fixing bolt (9), including: The settlement detection sensor (10) in the first guided wave transducer (6) is fixedly installed on the first steel pipe pole to be measured (1) through the fixing bolt (9). The settlement detection sensor (10) in the second guided wave transducer (5) is fixedly installed on the second steel pipe pole to be measured (2) through the fixing bolt (9).

5. The on-line detection system for uneven settlement of steel pipe poles according to claim 1, characterized in that, The multi-channel low-power guided wave instrument (8) includes a solar power supply module and a power supply switch. The solar power supply module is electrically connected to the power supply switch. The solar power supply module is used to supply power to the entire in-line detection system.

6. The on-line detection system for uneven settlement of steel pipe poles according to claim 5, characterized in that, The multi-channel low-power guided wave instrument (8) further includes: a system reset circuit, an interface display module, a central control circuit, and a human-computer interaction control circuit. The human-computer interaction control circuit is electrically connected to the power supply switch, the system reset circuit, the interface display module, and the central control circuit respectively. The interface display module is a liquid crystal display screen. The human-computer interaction control circuit is an embedded ARM circuit board. The central control circuit is a DSP control circuit board.

7. The on-line detection system for uneven settlement of steel pipe poles according to claim 6, characterized in that, The multi-channel low-power guided wave instrument (8) further includes a signal source circuit and a power amplification circuit. The signal source circuit is electrically connected to the central control circuit and the power amplification circuit respectively. The signal source circuit is a direct digital frequency synthesis signal circuit.

8. The on-line detection system for uneven settlement of steel pipe poles according to claim 7, characterized in that, The multi-channel low-power guided wave instrument (8) further includes a signal filtering circuit, a signal amplification circuit, and a multi-channel interface circuit. The multi-channel interface circuit is electrically connected to the power amplification circuit and the signal amplification circuit respectively, and the signal filtering circuit is electrically connected to the signal amplification circuit.

9. The on-line detection system for uneven settlement of steel pipe poles according to claim 8, characterized in that, The multi-channel low-power waveguide instrument (8) further includes an ADC acquisition circuit; The ADC acquisition circuit is electrically connected to the signal filtering circuit and the human-computer interaction control circuit respectively. The ADC acquisition circuit is a 16-bit acquisition circuit with a sampling frequency of 1 MHz.

10. The on-line detection system for uneven settlement of steel pipe poles according to claim 9, characterized in that, The multi-channel low-power waveguide instrument (8) further includes a cloud server, a communication and positioning module; The cloud server is electrically connected to the human-computer interaction control circuit, and the cloud server is communicatively connected to the communication and positioning module through a 4G network; The communication and positioning module includes a 4G communication module and a Beidou positioning module. The communication and positioning module transmits the Beidou positioning information and the waveguide signal to the cloud server through the TCP / IP protocol.

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