A ground marking and cathodic protection comprehensive intelligent monitoring system for oil and gas pipelines

Abstract

This invention relates to a ground marking and cathodic protection integrated intelligent monitoring system for oil and gas pipelines, comprising a polarized test piece soil reference tube, a self-corroding test piece soil reference tube, a Mark signal sensor, a power supply, and a data acquisition recorder. The data acquisition recorder is equipped with a GPS positioning module and a communication module; the power supply has a low voltage warning function; the data acquisition recorder collects and processes cathodic protection parameters, stray current interference data, and pipeline corrosion rate monitored by the polarized test piece soil reference tube, self-corrosion potential monitored by the self-corrosion test piece soil reference tube, and low-voltage alarm signals output by the power supply, and also processes the electrical signals output by the Mark signal sensor to generate positioning commands that trigger the GPS positioning module to output position signals; this invention achieves high efficiency, high precision, high integration, and high intelligence in oil and gas pipeline operation and maintenance management, improving the accuracy of pipeline corrosion detection and cathodic protection detection and the level of intelligent management.

Description

Technical Field

[0001] This invention relates to the field of corrosion monitoring and cathodic protection of oil and gas pipelines, specifically to a comprehensive intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines. Background Technology

[0002] Corrosion protection measures for buried oil and gas pipelines generally employ a combined protection technology of anti-corrosion coatings and cathodic protection. To ensure the effectiveness of cathodic protection, it is necessary to monitor the cathodic protection status along the pipeline route. Ordinary test piles can only collect data manually at regular intervals. Manual testing results in large errors and high labor costs, making it difficult to respond promptly to pipeline corrosion and the effectiveness of cathodic protection, and thus failing to meet the requirements of intelligent management.

[0003] In recent years, intelligent test piles have gradually replaced traditional test piles, realizing the automatic acquisition of pipeline cathodic protection data and transmitting it to the cloud platform or client via wireless network. The application of intelligent test piles not only greatly reduces manpower, but also effectively avoids errors in human measurement, improving the efficiency and accuracy of data acquisition. However, during the field use and testing of intelligent test piles, a number of problems have been found, mainly: (1) low battery voltage causes the intelligent test pile to fail to work; (2) natural corrosion potential shift. When existing test piles are buried, the self-corrosion test piece and the polarization test piece are placed in the same reference tube, which causes a certain degree of mutual interference, or the natural potential shift is caused by incomplete depolarization due to self-corrosion.

[0004] In addition, the ground marking system (Mark) is an important supporting device for pipeline detectors, used to detect and record the time it takes for the detector (with its built-in signal transmitter) to pass through the marked reference point. During pigging and magnetic flux leakage detection, to avoid potential safety hazards caused by equipment jamming, the detector's position needs to be tracked in real time. Typically, pipeline test piles are selected as ground Mark points. Combined with the time data recorded by the ground markers placed at the reference points, the relative distance from the defect to the nearest reference point can be calculated, thus enabling accurate defect location. Currently, the Mark system mainly relies on manual tracking. Personnel along the pipeline use pre-embedded Mark boxes or handheld receivers to track, locate, and time the pig and internal detector. This method requires a large number of personnel on-site, resulting in significant manpower and material costs.

[0005] Therefore, in response to the aforementioned problems in the field use of existing intelligent test piles, there is an urgent need to develop a new integrated intelligent monitoring system that combines ground marking and cathodic protection monitoring functions to further improve the accuracy of pipeline corrosion detection and cathodic protection detection, as well as the level of intelligent management. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a comprehensive intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines, so as to further improve the accuracy of pipeline corrosion detection and cathodic protection detection and the level of intelligent management.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a ground marking and cathodic protection integrated intelligent monitoring system for oil and gas pipelines, including a polarized test piece soil reference tube, a self-corroding test piece soil reference tube, a Mark signal sensor, a power supply, a data acquisition recorder and a host computer, wherein the data acquisition recorder is equipped with a GPS positioning module and a communication module;

[0008] The polarized test piece soil reference tube is used to monitor the cathodic protection parameters, stray current interference data and pipeline corrosion rate of oil and gas pipelines.

[0009] The self-corrosion test specimen soil reference tube is used to monitor the self-corrosion potential of the oil and gas pipeline;

[0010] The Mark signal sensor is used to sense the magnetic signal generated when the pipeline detector or / and pig passes the ground mark in the oil and gas pipeline, and converts the sensed magnetic signal into an electrical signal and outputs it.

[0011] The power supply has a low voltage warning function and is used to power the data acquisition recorder. When the power supply voltage is lower than the threshold voltage, it sends a low voltage alarm signal to the data acquisition recorder.

[0012] The data acquisition recorder is used to collect and process cathodic protection parameters, stray current interference data, and pipeline corrosion rate monitored by the polarized test specimen soil reference tube, self-corrosion potential monitored by the self-corrosion test specimen soil reference tube, and low-voltage alarm signal output by the power supply. It also uploads the processed cathodic protection parameters, stray current interference data, pipeline corrosion rate, self-corrosion potential, and low-voltage alarm signal to the host computer via the communication module. Furthermore, it is used to collect and process the electrical signal output by the Mark signal sensor to generate a positioning command, transmit the positioning command to the GPS positioning module, trigger the GPS positioning module to output the location signal of the ground marker, and acquire the location signal and upload it to the host computer via the communication module.

[0013] The host computer is equipped with system software, which is used to display and manage the uploaded position signal, processed cathodic protection parameters, stray current interference data, pipeline corrosion rate, self-corrosion potential, and low-pressure alarm signal.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the polarized test piece soil reference tube includes a first tube body and a polarized test piece and a first reference electrode housed within the first tube body;

[0016] The self-corroding test specimen soil reference tube includes a second tube body, a self-corroding test specimen, and a second reference electrode housed within the second tube body.

[0017] Furthermore, the Mark signal sensor is specifically a circumferentially arranged magnetic sensing coil, and the Mark signal sensor is electrically connected to the data acquisition recorder through a connecting wire passing through the second tube body; during installation, the Mark signal sensor is placed on the outer surface of the second tube body.

[0018] Furthermore, the data acquisition recorder includes a central processing module and a cathodic protection parameter acquisition module, a stray current acquisition module, a corrosion rate acquisition module, a self-corrosion potential acquisition module, and a Mark control module, which are electrically connected to the central processing module respectively.

[0019] The cathodic protection parameter acquisition module, the stray current acquisition module, and the corrosion rate acquisition module are all electrically connected to the polarized test piece and the first reference electrode. The self-corrosion potential acquisition module is also electrically connected to the self-corrosion test piece and the second reference electrode. The Mark control module is also electrically connected to the Mark signal sensor. The GPS positioning module and the communication module are respectively electrically connected to the central processing module.

[0020] Furthermore, the Mark control module includes a preamplifier circuit, a filter circuit, an AD conversion circuit, and a communication interface circuit; the Mark signal sensor is electrically connected to the central processing module in sequence through the preamplifier circuit, the filter circuit, the AD conversion circuit, and the communication interface circuit; the GPS positioning module is electrically connected to the central processing module through the communication interface circuit.

[0021] Furthermore, the Mark control module and / or the GPS positioning module have instant activation and sleep functions;

[0022] The host computer is also used to send a remote activation command to the central processing module based on the system software and through the communication module;

[0023] The central processing module is used to instantly activate the dormant Mark control module and / or the GPS positioning module according to the remote activation command.

[0024] Furthermore, the power supply includes a power interface circuit and a power voltage warning circuit;

[0025] The power interface circuit is used to draw power from the solar panel and / or the battery, and to supply power to the central processing module, the cathodic protection parameter acquisition module, the stray current acquisition module, the corrosion rate acquisition module, the self-corrosion potential acquisition module, and the Mark control module.

[0026] The power supply voltage warning circuit is used to monitor the supply voltage of the solar panel and / or the battery, and output a low voltage alarm signal when the supply voltage of the solar panel and / or the battery is lower than the threshold voltage.

[0027] The central processing unit is also used to collect and process the low-voltage alarm signal output by the power supply voltage warning circuit, and upload the processed low-voltage alarm signal to the host computer through the communication module.

[0028] Furthermore, the data acquisition recorder also includes a protective box and a PCB board installed inside the protective box. The central processing module, the cathodic protection parameter acquisition module, the stray current acquisition module, the corrosion rate acquisition module, the self-corrosion potential acquisition module, the Mark control module, the GPS positioning module, and the communication module are all integrated on the PCB board to form an integrated circuit board.

[0029] Furthermore, the intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines also includes a pile, a terminal block, and an antenna. The pile is buried at the ground marking location of the oil and gas pipeline, the antenna is placed on the upper part of the pile, and the terminal block, the power supply, and the data acquisition recorder are all installed inside the pile. The polarized test piece soil reference tube, the self-corrosion test piece soil reference tube, and the Mark signal sensor are all buried at the ground marking location of the oil and gas pipeline and are electrically connected to the data acquisition recorder through the terminal block. The antenna is also electrically connected to the data acquisition recorder.

[0030] Furthermore, the pile body is a seamless steel pipe or a non-metallic composite pipe.

[0031] The beneficial effects of this invention are as follows: This invention provides an integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines. It features cathodic protection parameter testing, stray current monitoring, corrosion rate detection, and self-corrosion potential testing. Through a GPS module and Mark signal sensor, it can track and mark pipeline detectors and / or pigs, and perform ground positioning. The dual soil reference tube design, based on polarized test specimen soil reference tubes and self-corrosion test specimen soil reference tubes, effectively avoids the influence of stray current interference and mutual interference between different types of test specimens, improving the accuracy and reliability of test results. The power supply has a low-voltage warning function, which can remind maintenance personnel to take timely measures to effectively avoid transmission anomalies and measurement errors caused by power undervoltage. This invention achieves high efficiency, high precision, high integration, and high intelligence in oil and gas pipeline operation and maintenance management, further improving the accuracy and intelligent management level of pipeline corrosion detection and cathodic protection detection. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structural connection of a ground marking and cathodic protection integrated intelligent monitoring system for oil and gas pipelines according to the present invention;

[0033] Figure 2 This is a structural block diagram of an integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to the present invention.

[0034] Figure 3 This is a schematic diagram of the dual soil reference tube structure;

[0035] Figure 4 This is a block diagram of the Mark control module.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 100. Intelligent test pile; 200. Host computer; 300. Oil and gas pipeline;

[0038] 101. Polarized test specimen soil reference tube; 102. Self-corroding test specimen soil reference tube; 103. Mark signal sensor; 104. Pile body; 105. Terminal block; 106. Power supply; 107. Data acquisition recorder; 108. Antenna;

[0039] 1011, First tube body; 1012, Polarized test piece; 1013, First reference electrode; 1021, Second tube body; 1022, Self-corrosion test piece; 1023, Second reference electrode. Detailed Implementation

[0040] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0041] like Figure 1 and Figure 2 As shown, a comprehensive intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines includes an intelligent test pile 100 and a host computer 200 equipped with system software. The intelligent test pile 100 includes a polarized soil reference tube 101, a self-corroding soil reference tube 102, a Mark signal sensor 103, and a pile body 104. The pile body 104 is equipped with a wiring board 105, a power supply 106, a data acquisition recorder 107, and an antenna 108. The data acquisition recorder 105 is equipped with a GPS positioning module and a communication module, and the power supply 106 has a low-voltage warning function. The polarized test specimen soil reference tube 101, the self-corroding test specimen soil reference tube 102, and the Mark signal sensor 103 are all electrically connected to the data acquisition recorder 107 through the terminal block 105. The power supply 106 supplies power to the data acquisition recorder 107. The antenna 108 is electrically connected to the communication module on the data acquisition recorder 107. The data acquisition recorder 107 communicates with the host computer 200 through the antenna 108.

[0042] In this specific embodiment:

[0043] The polarized soil reference tube 101 and the self-corroding soil reference tube 102 constitute a dual soil reference tube.

[0044] like Figure 3 As shown, the polarized test piece soil reference tube 101 includes a first tube body 1011, a polarized test piece 1012, and a first reference electrode 1013 housed within the first tube body 1011. The polarized test piece soil reference tube 101 is used for monitoring cathodic protection parameters, stray current interference data, and pipeline corrosion rates. Depending on the testing requirements, the number, working area, shape, and material of the polarized test pieces 1012 can be selected, as can the polarization probe.

[0045] like Figure 3 As shown, the self-corrosion test specimen soil reference tube 102 includes a second tube body 1021, a self-corrosion test specimen 1022, and a second reference electrode 1023 housed within the second tube body 1021. The self-corrosion test specimen soil reference tube 102 is used for self-corrosion potential acquisition. Depending on the testing requirements, the number, working area, shape, and material of the self-corrosion test specimens 1022 can be selected. Generally, it is recommended to use the same material as the protected oil and gas pipeline; alternatively, a corrosion rate probe can be selected.

[0046] Both the first tube body 1011 and the second tube body 1021 are made of non-metallic materials. During installation, the distance between the self-corrosion test soil reference tube 102 and the polarization test soil reference tube 101 is more than 0.2m.

[0047] The Mark signal sensor 103 is specifically a circumferentially arranged high-resolution, low-power, high-signal-noise magnetic sensing coil used to sense the magnetic signal generated when the pipeline detector or / and pipeline pig passes the ground mark in the oil and gas pipeline, and converts the sensed magnetic signal into an electrical signal and outputs it; the Mark signal sensor is electrically connected to the data acquisition recorder 107 through a connecting line passing through the second pipe body 1021 to avoid possible electrical signal interference in the polarized test soil reference tube 101; during installation, the Mark signal sensor 103 is placed on the outer surface of the second pipe body 1021, facing the oil and gas pipeline; the installation location of the Mark signal sensor 103 is the ground mark of the oil and gas pipeline.

[0048] The pile body 104 is made of seamless steel pipe or non-metallic composite pipe, buried near the oil and gas pipeline 300, and located at the preset ground mark.

[0049] The terminal block 105 is fixed to the top of the pile body 104. The polarized test specimen soil reference tube 101, the self-corroding test specimen soil reference tube 102, and the Mark signal sensor 103 are all electrically connected to the data acquisition recorder 107 through the terminal block 105. The main function of the terminal block 105 is to facilitate wiring, and the number of terminals on the terminal block 105 can be configured according to the testing and subsequent improvement requirements.

[0050] The power supply 106 has a low-voltage warning function and is used to power the data acquisition recorder. It also issues a low-voltage alarm signal to the data acquisition recorder when the supply voltage is lower than a threshold voltage. Specifically, the power supply 106 includes a power interface circuit and a power voltage warning circuit. The power interface circuit draws power from the solar panel and / or battery to power the data acquisition recorder 106. The power voltage warning circuit monitors the supply voltage of the solar panel and / or battery and outputs a low-voltage alarm signal when the supply voltage is lower than a threshold voltage. The threshold voltage is set according to the power consumption of the intelligent test pile; for example, 3V can be set as the threshold voltage. If the power supply voltage (also called the supply voltage) is lower than 3V, the host computer system software will issue an alarm prompting manual intervention to avoid test data errors due to undervoltage. The power supply 106 is placed inside the pile body 104, and a pile door is provided at the corresponding location for easy installation and maintenance.

[0051] The data acquisition recorder 107 is used to acquire and process the cathodic protection parameters, stray current interference data, and pipeline corrosion rate monitored by the polarized test specimen soil reference tube, the self-corrosion potential monitored by the self-corrosion test specimen soil reference tube, and the low-voltage alarm signal output by the power supply. The processed cathodic protection parameters, stray current interference data, pipeline corrosion rate, self-corrosion potential, and low-voltage alarm signal are then uploaded to the host computer via the communication module. It is also used to acquire and process the electrical signal output by the Mark signal sensor to generate a positioning command, which is then transmitted to the GPS positioning module to trigger the GPS positioning module to output the location signal of the ground marker. The GPS positioning module also acquires the location signal and uploads it to the host computer via the communication module. Specifically, the data acquisition recorder 107 includes a central processing module and a cathodic protection parameter acquisition module, a stray current acquisition module, a corrosion rate acquisition module, a self-corrosion potential acquisition module, and a Mark control module, all electrically connected to the central processing module. The GPS positioning module and the communication module are electrically connected to the central processing module. The cathodic protection parameter acquisition module, the stray current acquisition module, and the corrosion rate acquisition module are also electrically connected to the polarized test piece and the first reference electrode. The self-corrosion potential acquisition module is also electrically connected to the self-corrosion test piece and the second reference electrode. The Mark control module is also electrically connected to the Mark signal sensor.

[0052] The data logger 107 is placed inside the pile body 104, between the power supply 106 and the terminal block 105, with a pile door corresponding to the pile body for easy installation and maintenance. The data logger 107 also includes a protective box and a PCB board installed in the protective box. The central processing module, the cathodic protection parameter acquisition module, the stray current acquisition module, the corrosion rate acquisition module, the self-corrosion potential acquisition module, the Mark control module, the GPS positioning module, and the communication module are all integrated on the PCB board to form an integrated circuit board.

[0053] The central processing module is used to process the acquired analog signals, convert them into digital signals via an analog-to-digital converter (AD), and then upload them to the host computer via the communication module.

[0054] The communication module can be a 4G, 5G, or BeiDou communication module.

[0055] The GPS positioning module adopts a highly integrated GPS+BeiDou dual-mode positioning module with high precision. It outputs via the NMEA-0183 protocol, and the time synchronization resolution can reach 1ms.

[0056] like Figure 4As shown, the Mark control module includes a Mark signal microcontroller chip and a communication interface circuit to realize activation, Mark signal acquisition, and transmission functions. The Mark signal microcontroller chip includes a preamplifier circuit, a filter circuit, an AD conversion circuit, and a communication interface circuit. The Mark signal sensor is electrically connected to the central processing module in sequence through the preamplifier circuit, the filter circuit, the AD conversion circuit, and the communication interface circuit. The GPS positioning module is electrically connected to the central processing module through the communication interface circuit. The preamplifier circuit and the filter circuit in the Mark signal microcontroller chip amplify and filter the signal, converting the low-frequency electrical signal output by the Mark signal sensor into an electrical signal measurable by the AD conversion circuit. After AD conversion, the signal is transmitted to the central processing module through the communication interface circuit. The central processing module analyzes the AD conversion result to obtain a positioning command, and then sends the positioning command to the GPS unit through the communication interface circuit. After receiving the positioning command, the GPS unit sends its location to the central processing module through the communication interface circuit, and then the communication module transmits it to the host computer to complete the tracking, marking, and positioning of various internal detectors.

[0057] Given the time-sensitive nature of the Mark function requirements, the Mark control module and / or the GPS positioning module have instant activation and sleep functions. The Mark control module and / or the GPS positioning module can be remotely activated and turned on via system software installed on the host computer 200.

[0058] Antenna 108 is placed on the upper part of pile 104 to facilitate signal transmission.

[0059] The host computer 200 can be accessed via either a mobile device or a PC; however, a mobile device is recommended for on-site detection or Mark signal tracking. The system software displays data from each remote monitoring module of the monitoring system in graphical form on the host computer 200 window. It allows for parameter setting, searching, browsing, comparison, analysis, early warning, and printing functions. The system software features a multi-functional interface including basic system information, cathodic protection operating parameter monitoring, stray current monitoring, power supply warning, corrosion rate monitoring, and Mark signal tracking.

[0060] Based on the practical needs of intelligent management of oil and gas pipelines, this invention provides a novel integrated intelligent acquisition and monitoring system that combines ground-based Mark and cathodic protection monitoring functions. The system features cathodic protection parameter testing, stray current monitoring, corrosion rate detection, internal detector tracking and marking, and ground positioning. The dual soil reference tube design effectively avoids measurement errors caused by interference from polarized and self-corroding test pieces. A built-in power supply voltage warning circuit prevents data testing and transmission anomalies due to undervoltage. The Mark control module can be activated and deactivated instantly, saving significant manpower and material resources required for internal detector positioning and other maintenance costs. This invention is used for monitoring cathodic protection parameters, stray currents, corrosion rates, and tracking and locating corrosion defects in oil and gas pipelines, achieving high efficiency, high precision, high integration, and high intelligence in oil and gas pipeline operation and maintenance management, further improving the accuracy of pipeline corrosion detection and cathodic protection detection, as well as the level of intelligent management.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A comprehensive intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines, characterized in that: It includes a polarized soil reference tube, a self-corroding soil reference tube, a Mark signal sensor, a power supply, a data acquisition recorder, and a host computer. The data acquisition recorder is equipped with a GPS positioning module and a communication module. The polarized test piece soil reference tube is used to monitor the cathodic protection parameters, stray current interference data and pipeline corrosion rate of oil and gas pipelines. The self-corrosion test specimen soil reference tube is used to monitor the self-corrosion potential of the oil and gas pipeline; The Mark signal sensor is used to sense the magnetic signal generated when the pipeline detector or / and pig passes the ground mark in the oil and gas pipeline, and converts the sensed magnetic signal into an electrical signal and outputs it. The power supply has a low voltage warning function and is used to power the data acquisition recorder. When the power supply voltage is lower than the threshold voltage, it sends a low voltage alarm signal to the data acquisition recorder. The data acquisition recorder is used to acquire and process the cathodic protection parameters, stray current interference data, and pipeline corrosion rate monitored by the polarized test piece soil reference tube, the self-corrosion potential monitored by the self-corrosion test piece soil reference tube, and the low-voltage alarm signal output by the power supply. It also uploads the processed cathodic protection parameters, stray current interference data, pipeline corrosion rate, self-corrosion potential, and low-voltage alarm signal to the host computer via the communication module. Furthermore, it is used to acquire and process the electrical signal output by the Mark signal sensor to generate a positioning command, transmit the positioning command to the GPS positioning module, trigger the GPS positioning module to output the location signal of the ground marker, and acquire the location signal and upload it to the host computer via the communication module. The host computer is equipped with system software, which is used to display and manage the uploaded position signal, processed cathodic protection parameters, stray current interference data, pipeline corrosion rate, self-corrosion potential and low-pressure alarm signal through the system software. The polarized test piece soil reference tube includes a first tube body and a polarized test piece and a first reference electrode housed within the first tube body; The self-corroding test specimen soil reference tube includes a second tube body, a self-corroding test specimen, and a second reference electrode housed within the second tube body.

2. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 1, characterized in that: The Mark signal sensor is specifically a circumferentially arranged magnetic sensing coil. The Mark signal sensor is electrically connected to the data acquisition recorder through a connecting wire passing through the second tube. During installation, the Mark signal sensor is placed on the outer surface of the second tube.

3. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 1, characterized in that: The data acquisition recorder includes a central processing module and a cathodic protection parameter acquisition module, a stray current acquisition module, a corrosion rate acquisition module, a self-corrosion potential acquisition module, and a Mark control module, which are electrically connected to the central processing module respectively. The cathodic protection parameter acquisition module, the stray current acquisition module, and the corrosion rate acquisition module are all electrically connected to the polarized test piece and the first reference electrode. The self-corrosion potential acquisition module is also electrically connected to the self-corrosion test piece and the second reference electrode. The Mark control module is also electrically connected to the Mark signal sensor. The GPS positioning module and the communication module are respectively electrically connected to the central processing module.

4. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 3, characterized in that: The Mark control module includes a preamplifier circuit, a filter circuit, an AD conversion circuit, and a communication interface circuit; the Mark signal sensor is electrically connected to the central processing module in sequence through the preamplifier circuit, the filter circuit, the AD conversion circuit, and the communication interface circuit; the GPS positioning module is electrically connected to the central processing module through the communication interface circuit.

5. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 3, characterized in that: The Mark control module and / or the GPS positioning module have instant activation and sleep functions; The host computer is also used to send a remote activation command to the central processing module based on the system software and through the communication module; The central processing module is used to instantly activate the dormant Mark control module and / or the GPS positioning module according to the remote activation command.

6. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 3, characterized in that: The power supply includes a power interface circuit and a power voltage warning circuit. The power interface circuit is used to draw power from the solar panel and / or the battery, and to supply power to the central processing module, the cathodic protection parameter acquisition module, the stray current acquisition module, the corrosion rate acquisition module, the self-corrosion potential acquisition module, and the Mark control module. The power supply voltage warning circuit is used to monitor the supply voltage of the solar panel and / or the battery, and output a low voltage alarm signal when the supply voltage of the solar panel and / or the battery is lower than the threshold voltage. The central processing module is also used to collect and process the low-voltage alarm signal output by the power supply voltage early warning circuit, and upload the processed low-voltage alarm signal to the host computer through the communication module.

7. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 3, characterized in that: The data acquisition recorder also includes a protective box and a PCB board installed inside the protective box. The central processing module, the cathodic protection parameter acquisition module, the stray current acquisition module, the corrosion rate acquisition module, the self-corrosion potential acquisition module, the Mark control module, the GPS positioning module, and the communication module are all integrated on the PCB board to form an integrated circuit board.

8. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to any one of claims 1 to 7, characterized in that: The intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines also includes a pile, a terminal block, and an antenna. The pile is buried at the ground marking location of the oil and gas pipeline, the antenna is placed on the upper part of the pile, and the terminal block, the power supply, and the data acquisition recorder are all installed inside the pile. The polarized test piece soil reference tube, the self-corrosion test piece soil reference tube, and the Mark signal sensor are all buried at the ground marking location of the oil and gas pipeline and are electrically connected to the data acquisition recorder through the terminal block. The antenna is also electrically connected to the data acquisition recorder.

9. The integrated intelligent monitoring system for ground marking and cathodic protection of oil and gas pipelines according to claim 8, characterized in that: The pile body is a seamless steel pipe or a non-metallic composite pipe.

Images