Pipeline cathode protection potential measurement system and method based on Beidou satellite

Abstract

The invention provides a pipeline cathode protection potential measurement system and method based on a Beidou satellite, relates to the technical field of pipeline external detection, and aims to solve the technical problems that the time synchronization delay of a data collector and a current interrupter is high and the positioning precision of a detection point is insufficient. Collecting a cathode protection potential signal of the pipeline; the auxiliary probe stick is matched with the main probe stick to form a soil potential difference measurement loop; the data collector is used for collecting cathode protection potential data of the pipeline, and providing synchronous time service and obtaining position information of a detection point by means of the Beidou module; the synchronous current interrupter is used for controlling the on-off of the cathode protection current of the pipeline and is synchronized with the data collector through the Beidou module; the winder is used for connecting the data collector and the pipeline and obtaining the detection distance between the data collector and the pipeline. According to the invention, the synchronous time delay of the data collector and the synchronous current interrupter can be reduced, and the positioning precision of a detection point is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline external detection, and in particular to a pipeline cathodic protection potential measurement system and method based on Beidou satellite. BACKGROUND

[0002] Pipeline transportation plays a vital role in the field of energy transportation such as oil and natural gas. However, pipelines are buried underground for a long time and are affected by various factors such as soil environment and pipe medium, and are prone to corrosion. As an effective corrosion protection method, cathodic protection applies a cathodic current to the pipeline to make its potential reach a certain range, thereby inhibiting corrosion. Therefore, it is necessary to detect the pipeline cathodic protection system to ensure the safe operation of the pipeline. In the detection process of the pipeline cathodic protection system, how to accurately measure the pipeline cathodic protection potential is of great significance to evaluate the protection effect of the pipeline cathodic protection system and ensure the safe operation of the pipeline.

[0003] In general technology, the detection of the pipeline cathodic protection system is mainly based on non-excavation detection on the ground. Common detection methods mainly include: direct current voltage gradient method (DCVG), alternating current voltage gradient method (ACVG), alternating current attenuation method (ACAS), close interval potential survey (CIPS), and CIPS / DCVG combined detection technology.

[0004] However, the current non-excavation external pipeline detection almost relies on the detection equipment of global positioning system (GPS) or global navigation satellite system (GNSS). In terms of positioning and timing accuracy, information security, etc., GPS and GNSS cannot meet the accuracy requirements of external pipeline detection. The data collector, handheld data analysis instrument and current interrupter based on GPS and GNSS have serious time synchronization delay and low positioning accuracy, which leads to deviation in the measured cathodic protection potential and incorrect judgment of the overall cathodic protection condition of the pipeline. SUMMARY

[0005] The embodiment of the present disclosure provides a pipeline cathodic protection potential measurement system and method based on Beidou satellite, aiming to solve the technical problems of high time synchronization delay of data collector and current interrupter and insufficient positioning accuracy of detection point.

[0006] To achieve the above object, the application adopts the following technical scheme:

[0007] In a first aspect, a pipeline cathodic protection potential measurement system based on Beidou satellite is provided, comprising a main probe, a secondary probe, a data collector, a synchronous current interrupter, a winding device and a handheld data collection analyzer; the data collector, the synchronous current interrupter and the handheld data collection analyzer are configured with a Beidou module; the main probe is used to contact the ground surface above the pipeline to collect the cathodic protection potential signal of the pipeline; the secondary probe is used to cooperate with the main probe to form a soil potential difference measurement loop; the data collector is used to collect the cathodic protection potential data of the pipeline and rely on the Beidou module to provide synchronous timing and obtain the position information of the detection point collected by the data collector; the synchronous current interrupter is used to control the on-off of the cathodic protection current of the pipeline and rely on the Beidou timing signal obtained by the Beidou module to perform synchronous on-off operation; the winding device is used to connect the test port of the data collector and the pipeline and obtain the detection distance between the test port of the data collector and the pipeline; the handheld data collection analyzer is used to display the cathodic protection potential data of the pipeline, the position information of the detection point, the waveform and the system state.

[0008] Optionally, the Beidou module is a dual-frequency Beidou module.

[0009] Optionally, the handheld data collection analyzer is used to update the position information of the detection point based on the Beidou module and a network real-time kinematic RTK algorithm to obtain the positioning information of the detection point; the positioning accuracy of the positioning information is higher than the positioning accuracy of the position information; the positioning accuracy of the positioning information is a centimeter-level positioning accuracy.

[0010] Optionally, the Beidou module is used to receive the Beidou timing signal sent by the Beidou satellite and calibrate the clock deviation of the synchronous current interrupter, the handheld data collection analyzer and the data collector through the Beidou timing signal.

[0011] Optionally, the handheld data collection analyzer is used to generate a soil potential gradient distribution map based on the cathodic protection potential data of the pipeline and the positioning information of the detection point, and mark the positioning information of the cathodic protection potential abnormal area of the pipeline and the corrosion risk level of the pipeline.

[0012] In a second aspect, a pipeline cathodic protection potential measurement method based on Beidou satellite is provided, applied to the pipeline cathodic protection potential measurement system based on Beidou satellite provided in the first aspect, and the method comprises:

[0013] Initializing the data collector and the handheld data collection analyzer.

[0014] The cathodic protection potential data and the soil potential gradient data of the pipeline are collected by the main probe and the auxiliary probe along the direction of the pipeline.

[0015] The data collector is connected to the pipeline according to the winding device, and the detection distance between the data collector and the pipeline is measured and recorded.

[0016] The cathodic protection potential data of the pipeline, the position information of the detection point and the time information are collected by the data collector.

[0017] The on-off of the cathodic protection current of the pipeline is controlled based on the Beidou timing signal according to the synchronous current interrupter.

[0018] The pipeline potential distribution map and the waveform map are generated by the handheld data analysis instrument combined with the cathodic protection potential data of the pipeline and the positioning information of the detection point, and the abnormal area of the pipeline is marked.

[0019] The detection report is output to guide the maintenance personnel to formulate the pipeline corrosion protection maintenance strategy.

[0020] In a third aspect, a pipeline cathodic protection potential measurement device based on a Beidou satellite is provided, including a memory and a processor; the memory is used to store computer execution instructions, and the processor is connected to the memory through a bus; when the pipeline cathodic protection potential measurement device based on the Beidou satellite is running, the processor executes the computer execution instructions stored in the memory, so that the pipeline cathodic protection potential measurement device based on the Beidou satellite executes the pipeline cathodic protection potential measurement method based on the Beidou satellite in the second aspect.

[0021] The pipeline cathodic protection potential measurement device based on the Beidou satellite can be an electronic device or a part of the device in the electronic device, such as a chip system in the electronic device. The chip system is used to support the electronic device to realize the functions involved in the first aspect and any one of the possible implementation manners thereof, for example, to acquire and determine the data and / or information involved in the above-mentioned pipeline cathodic protection potential measurement method based on the Beidou satellite. The chip system includes a chip and can also include other discrete devices or circuit structures.

[0022] In a fourth aspect, a computer readable storage medium is provided, which includes computer execution instructions, when the computer execution instructions run on a computer, so that the computer executes the pipeline cathodic protection potential measurement method based on the Beidou satellite in the first aspect.

[0023] The fifth aspect also provides a computer program product, which comprises computer programs or instructions, and when the computer instructions run on the Beidou satellite-based pipeline cathodic protection potential measuring device, the Beidou satellite-based pipeline cathodic protection potential measuring device performs the Beidou satellite-based pipeline cathodic protection potential measuring method as described in the second aspect above.

[0024] It should be noted that the computer instructions described above can be stored on a computer readable storage medium in whole or in part. The computer readable storage medium can be packaged together with the processor of the Beidou satellite-based pipeline cathodic protection potential measuring device, or can be packaged separately from the processor of the Beidou satellite-based pipeline cathodic protection potential measuring device, and the embodiments of the present application do not limit this.

[0025] The second aspect, the third aspect, the fourth aspect and the fifth aspect of the present application can refer to the detailed description of the first aspect.

[0026] In the embodiments of the present application, the name of the Beidou satellite-based pipeline cathodic protection potential measuring system described above does not constitute a limitation on the device or the function module itself, and in actual implementation, these devices or function modules can appear with other names. For example, the data collector can also be referred to as a data collection module, a data collection unit, etc. As long as the functions of each device or function module are similar to those of the present application, they belong to the scope of the claims of the present application and equivalent technologies.

[0027] The technical solutions provided by the present application at least bring the following beneficial effects:

[0028] Based on any of the above aspects, the embodiments of the present application provide a Beidou satellite-based pipeline cathodic protection potential measuring system, which comprises a main probe, a secondary probe, a data collector, a synchronous current interrupter, a winding device and a handheld data collection and analysis instrument. The data collector, the synchronous current interrupter and the handheld data collection and analysis instrument are configured with a Beidou module. The main probe is used to contact the ground surface above the pipeline to collect the cathodic protection potential signal of the pipeline. The secondary probe is used to cooperate with the main probe to form a soil potential difference measurement loop. The data collector is used to collect the cathodic protection potential data of the pipeline and rely on the Beidou module to provide synchronous timing and obtain the position information of the detection point collected by the data collector. The synchronous current interrupter is used to control the on-off of the cathodic protection current of the pipeline and rely on the Beidou timing signal obtained by the Beidou module to perform synchronous on-off operation. The winding device is used to connect the test port of the data collector and the pipeline and obtain the detection distance between the test port of the data collector and the pipeline. The handheld data collection and analysis instrument is used to display the cathodic protection potential data of the pipeline, the position information of the detection point, the waveform and the system state.

[0029] From the above, the application can obtain the Beidou timing signal by the data collector relying on the Beidou module, and the data collector can be synchronized by the Beidou timing signal, so as to realize the collection time of the synchronous data collector. The data collector can also obtain the position information of the detection point collected by the data collector through the built-in Beidou module. At the same time, the handheld data collection analyzer and the synchronous current interrupter can obtain the Beidou timing signal through the configured Beidou module to realize the synchronous timing, so as to reduce the delay between the data collector, the handheld data collection analyzer and the synchronous current interrupter.

[0030] Secondly, the application can improve and update the positioning accuracy of the position information of the detection point obtained by the data collector by embedding the Beidou module in the handheld data collection analyzer and based on the network real-time dynamic difference algorithm, so as to obtain the positioning information of the detection point with higher positioning accuracy. The positioning accuracy of the positioning information of the detection point can reach centimeter level, thereby improving the positioning accuracy of the detection point.

[0031] The beneficial effects of the first aspect, the second aspect, the third aspect, the fourth aspect and the fifth aspect of the application can be referred to the analysis of the beneficial effects above, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A structure schematic diagram of a pipeline cathodic protection potential measurement system based on Beidou satellite provided by the embodiment of the application;

[0033] Figure 2 A flowchart of a pipeline cathodic protection potential measurement method based on Beidou satellite provided by the embodiment of the application;

[0034] Figure 3 A structure schematic diagram of a pipeline cathodic protection potential measurement device based on Beidou satellite provided by the embodiment of the application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0036] It should be noted that in the embodiments of the present application, the words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design. In fact, a word such as "exemplary" or "for example" is used to represent the relevant concept in a specific manner.

[0037] In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same or similar items with basically the same function and role. Those skilled in the art can understand that the words "first", "second", etc. are not used to limit the number and execution order.

[0038] As described in the background, cathodic protection is a technology that can effectively prevent pipeline corrosion. Therefore, when the pipeline cathodic protection system protects the pipeline, the pipeline cathodic protection system needs to be detected to ensure the safe operation of the pipeline. In the detection process of the pipeline cathodic protection system, the detection and evaluation of the protection effect of the pipeline cathodic protection system are realized by measuring the pipeline cathodic protection potential.

[0039] In the general technology, the time synchronization delay between the pipeline cathodic protection potential detection device, the data collector, the handheld data collection analyzer and the current interrupter is serious, and the positioning accuracy is low, which leads to deviation in the measured cathodic protection potential and error judgment in the detection of the overall cathodic protection condition of the pipeline.

[0040] To solve the above problems, the embodiments of the present application provide a pipeline cathodic protection potential measurement system based on Beidou satellite, which comprises a main probe, a secondary probe, a data collector, a synchronous current interrupter, a winding device and a handheld data collection analyzer. The data collector, the synchronous current interrupter and the handheld data collection analyzer are configured with a Beidou module. The main probe is used to contact the ground surface above the pipeline to collect the cathodic protection potential signal of the pipeline. The secondary probe is used to cooperate with the main probe to form a soil potential difference measurement loop. The data collector is used to collect the cathodic protection potential data of the pipeline and rely on the Beidou module to provide synchronous timing and obtain the position information of the detection point collected by the data collector. The synchronous current interrupter is used to control the on-off of the cathodic protection current of the pipeline and rely on the Beidou timing signal obtained by the Beidou module to perform synchronous on-off operation. The winding device is used to connect the test port of the data collector and the pipeline and obtain the detection distance between the test port of the data collector and the pipeline. The handheld data collection analyzer is used to display the cathodic protection potential data of the pipeline, the position information of the detection point, the waveform and the system state.

[0041] As can be seen from the above, the application configures a Beidou module in the data collector, the handheld data collection analyzer and the synchronous current interrupter. The data collector can obtain the Beidou timing signal by means of the Beidou module, and synchronously time by means of the Beidou timing signal, so as to realize the collection time of the synchronous data collector. The data collector also obtains the position information of the detection point collected by the data collector by means of the built-in Beidou module. Meanwhile, the handheld data collection analyzer and the synchronous current interrupter can obtain the Beidou timing signal by means of the configured Beidou module, so as to synchronously time, thereby reducing the delay between the data collector, the handheld data collection analyzer and the synchronous current interrupter.

[0042] Secondly, the application can improve the positioning accuracy of the position information of the detection point obtained by the data collector by means of the built-in Beidou module in the handheld data collection analyzer and the network real-time dynamic difference algorithm, so as to obtain the positioning information of the detection point with higher positioning accuracy. The positioning accuracy of the determined positioning information of the detection point can reach centimeter level.

[0043] Figure 1 A structure schematic diagram of a pipeline cathodic protection potential measurement system based on Beidou satellite provided by an embodiment of the application is shown. As shown in the figure, the pipeline cathodic protection potential measurement system based on Beidou satellite can measure the cathodic protection of the pipeline 100. The pipeline cathodic protection potential measurement system based on Beidou satellite comprises a main probe 101, a secondary probe 102, a data collector 103, a synchronous current interrupter 104, a winding device 105 and a handheld data collection analyzer 106. Figure 1

[0044] Among them, the data collector 103, the handheld data collection analyzer 106 and the synchronous current interrupter 104 are configured with a Beidou module.

[0045] As shown in the figure, the main probe 101 and the secondary probe 102 are connected and communicated with the data collector 103, the data collector 103 is connected and communicated with the handheld data collection analyzer 106, the winding device 105 is connected and communicated with the data collector 103 and the pipeline 100 respectively, and the synchronous current interrupter 104 is connected in series in the cathodic protection system (also referred to as the pipeline cathodic protection system). Figure 1

[0046] For example, the main probe 101 and the secondary probe 102 can be connected and communicated with the data collector 103 through a wired connection, the data collector 103 and the handheld data collection analyzer 106 can be connected and communicated through Bluetooth, the data collector 103 and the winding device 105 can be connected and communicated through a wired connection, and the winding device 105 can be connected and communicated with the pipeline 100 through an enameled wire (a kind of winding wire, which has a conductor and an insulating layer).

[0047] ​​In practical applications, one or more synchronous current interrupters 104 are deployed at each station yard, Figure 1 For example, one synchronous current interrupter 104 is deployed at station yard 1 and station yard 2 respectively.

[0048] The main probe 101 is used to contact the ground surface above the pipeline 100 to collect the cathodic protection potential signal of the pipeline 100.

[0049] Specifically, because there is a potential difference between the pipeline 100 under cathodic protection and the surrounding soil, the main probe 101 can be placed at a position on the ground surface above the pipeline 100 to fully contact the soil surface of the ground surface above the pipeline 100, thereby obtaining the cathodic protection potential signal of the current detection point of the pipeline 100.

[0050] The auxiliary probe 102 is used to cooperate with the main probe 101 to form a soil potential difference measurement loop.

[0051] Specifically, the auxiliary probe 102 can be placed at a position with a certain distance from the main probe 101 (the distance between the auxiliary probe 102 and the main probe 101 can be a pre-set distance), and the auxiliary probe 102 and the main probe 101 form a closed soil potential difference measurement loop together with the soil medium through their respective connecting lines and internal conductive paths.

[0052] For example, in the direct current potential gradient (DCVG) measurement mode, the tester holds the main probe 101 and the auxiliary probe 102 and measures along the direction of the pipeline 100, and the main probe 101 and the auxiliary probe 102 need to maintain a suitable distance on the ground (for example, between 0.5 meters and 1.5 meters), and ensure that the main probe 101 and the auxiliary probe 102 are vertically inserted into the ground to ensure that the main probe 101 and the auxiliary probe 102 are in full contact with the soil above the pipeline 100, thereby capturing the potential gradient change in the soil, forming a soil potential difference measurement loop, and collecting the cathodic protection potential data of the pipeline 100.

[0053] The data collector 103 is used to collect the cathodic protection potential data of the pipeline 100, and relies on the Beidou module to provide synchronous timing and obtain the position information of the detection point collected by the data collector 103.

[0054] Specifically, the main probe 101 and the data collector 103 are connected by wire, so that the data collector 103 can obtain the cathodic protection potential signal of the pipeline 100 collected by the main probe 101, and collect the cathodic protection potential data of the pipeline 100 based on the preset data collection condition according to the obtained cathodic protection signal. At the same time, the data collector 103 can obtain the Beidou timing signal for synchronous timing by relying on the built-in Beidou module, and the data collector 103 can obtain the position information of the detection point collected by the data collector 103 according to the Beidou module.

[0055] Optionally, the preset data collection condition can include at least one of a preset data collection frequency and a preset data collection interval.

[0056] Exemplarily, the cathodic protection potential signal obtained by the main probe 101 is transmitted to the input port of the data collector 103 through a corresponding interface or a wire, and the data collector 103 receives the cathodic protection potential signal transmitted by the main probe 101 based on the preset parameters (such as sampling frequency, measurement range, etc.). The data collector 103 processes the received cathodic protection potential signal (for example, converts the potential signal into a digital signal), and accurately obtains the numerical value of the cathodic protection potential, so as to realize the collection of the cathodic protection potential of the pipeline 100. The data collector 103 obtains the Beidou timing signal through the built-in Beidou module, calibrates the local clock of the data collector 103 according to the Beidou timing signal, and realizes the synchronization of the local time of the data collector 103 and the Beidou system time.

[0057] The synchronous current interrupter 104 is used for controlling the on-off of the cathodic protection current of the pipeline 100, and performs synchronous on-off operation by relying on the Beidou timing signal obtained by the Beidou module.

[0058] Specifically, during the detection of the cathodic protection of the pipeline 100, the synchronous current interrupter 104 is used for controlling the on-off of the cathodic protection current in the pipeline 100, and the local clock of the synchronous current interrupter 104 is calibrated by relying on the Beidou timing signal obtained by the built-in Beidou module in the synchronous current interrupter 104, so as to realize the synchronization of the local time of the synchronous current interrupter 104 and the Beidou system time, thereby synchronizing the on-off time of the control current and realizing synchronous on-off operation.

[0059] In some embodiments, the Beidou module is used for receiving the Beidou timing signal sent by the Beidou satellite, and calibrating the clock deviation of the synchronous current interrupter 104, the handheld data collection and analysis instrument 106 and the data collector 103 through the Beidou timing signal.

[0060] Optionally, the Beidou time signal includes a pulse per second (PPS), which can also be referred to as a Beidou pulse per second signal. The synchronous current interrupter 104, the handheld data acquisition analyzer 106, and the data collector 103 can receive the signal emitted by the Beidou satellite through the built-in Beidou module, including the pulse per second signal. The synchronous current interrupter 104, the handheld data acquisition analyzer 106, and the data collector 103 calibrate the deviation of the local clock according to the periodicity of the received pulse per second signal.

[0061] For example, the synchronous current interrupter 104 obtains the Beidou time signal through the built-in Beidou module, and the Beidou module decodes the received Beidou time signal to extract time-related information, including the pulse per second signal (wherein, according to the periodicity of the pulse per second signal, the pulse per second signal outputs one pulse per second, and the pulse front edge has high synchronization accuracy with the coordinated universal time, and the synchronization error is generally within 20 ns). Combined with the periodicity of the pulse per second signal, the synchronous current interrupter 104 compares the local clock with the pulse per second signal, and calculates the time difference between the two. According to the calculation result, the synchronous current interrupter 104 adjusts the local clock to keep it synchronized with the standard time of the Beidou satellite, and then controls the on-off of the cathodic protection current according to the accurate time interval.

[0062] Correspondingly, the data collector 103 can also obtain the Beidou time signal through the built-in Beidou module. Then, based on the above-mentioned process of the synchronous current interrupter 104 calibrating the local clock, the data collector 103 also calibrates the local clock of the data collector 103 in the same calibration manner, and then the data collector 103 collects the cathodic protection potential data at the accurate time according to the time reference determined by the pulse per second signal, so as to ensure that the collected cathodic protection potential data of the pipeline 100 is strictly synchronized with the on-off state of the synchronous current interrupter 104, thereby reducing the delay between the data collector 103 and the synchronous current interrupter 104, ensuring the accuracy of the measured cathodic protection potential data, and ensuring the accuracy and reliability of the detection of the overall cathodic protection condition of the pipeline 100.

[0063] Likewise, according to the local clock calibration process of the above-mentioned synchronous current interrupter 104 and the data collector 103, the handheld data collection analyzer 106 can obtain the Beidou timing signal through the built-in Beidou module, and then, based on the process of the above-mentioned synchronous current interrupter 104 calibrating the local clock, the handheld data collection analyzer 106 also calibrates the local clock of the handheld data collection analyzer 106 in the same calibration manner, and then the handheld data collection analyzer 106 ensures that the data obtained or processed by the handheld data collection analyzer 106 is strictly synchronized with the on-off state of the synchronous current interrupter 104 and the collection time of the data collector 103 according to the time reference determined by the second pulse signal, further ensuring the accuracy of the analysis of the cathodic protection condition of the pipeline 100. Thus, the synchronization delay of the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106 is reduced. As can be seen from the above, the application embeds a Beidou module in the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106, receives the second pulse signal through the Beidou module, and calibrates the clock deviation of the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106 in combination with the periodicity of the second pulse signal. The application compresses the synchronization error in the general technology based on the GPS mode from the microsecond level to the nanosecond level (wherein the synchronization error based on the Beidou second pulse calibration is less than or equal to 20 ns) through the combination of the Beidou second pulse calibration, and ensures the synchronization of the collection time of the data collection of the data collector 103 and the control time of the current on-off control of the synchronous current interrupter 104 and the local time of the handheld data collection analyzer 106. The periodic calibration based on the Beidou second pulse calibration can overcome the clock cumulative error of the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106, and ensure the reliability of the system in long-time detection (such as continuous operation across day and night).

[0064] In some embodiments, the Beidou module is a dual-frequency Beidou module.

[0065] It should be noted that the dual-frequency Beidou module can receive multiple satellite frequency signals at the same time, has a wider frequency range, and can eliminate the influence of ionospheric effects, thereby improving the positioning accuracy, such as achieving centimeter or decimeter level positioning in some applications. The dual-frequency Beidou module can receive multiple frequency signals, has better signal reception capability in complex electromagnetic environments, such as urban canyons, high-rise obstructions and other scenes, has strong anti-interference capability, and can provide positioning services more stably. Subsequently, a dual-frequency mode can be realized based on the dual-frequency Beidou module, positioning is performed through two carrier signals of different frequencies transmitted by the Beidou No. 3 satellite, the anti-interference capability can be enhanced, and the hardware complexity can be reduced while ensuring the positioning accuracy.

[0066] As can be seen from the above, the Beidou module built in the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106 can realize the precise synchronization of the data collection time of the data collector 103, the control time of the synchronous current interrupter 104 on the on-off of the cathodic protection current and the time of the handheld data collection analyzer 106, and solve the problem of high time-space data synchronization delay of the detection equipment based on the GPS / GNSS technology in the general technology. The synchronization between the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106 is realized based on the Beidou time signal. The synchronous current interrupter 104 controls the on-off of the cathodic protection current based on the second pulse signal, the data collector 103 collects the cathodic protection potential data of the pipeline 100 according to the same Beidou time, and the handheld data collection analyzer 106 calibrates the local clock through the Beidou time service to ensure that the handheld data collection analyzer 106 keeps the same time as the data collector 103 and the synchronous current interrupter 104 when receiving and analyzing data. This synchronization method can avoid the measurement deviation of the cathodic protection potential data collected by the data collector 103 caused by the on-off delay of the synchronous current interrupter 104, and reduce the synchronization delay between the data collector 103, the synchronous current interrupter 104 and the handheld data collection analyzer 106. Compared with the GPS synchronization (the error is usually greater than 1 μs), the synchronization realized based on the Beidou second pulse signal has an error less than or equal to 20 ns, which can effectively eliminate the potential data deviation caused by the on-off delay of the synchronous current interrupter 104, the asynchronous collection time of the data collector 103 or the analysis time sequence dislocation of the handheld data collection analyzer 106, and improve the measurement accuracy. At the same time, the use of the self-controllable Beidou system can avoid the data leakage risk caused by the dependence on foreign satellites (such as GPS / GNSS), and ensure the safety of the pipeline detection data.

[0067] The winding device 105 is used to connect the test port of the data collector 103 and the pipeline 100, and obtain the detection distance between the test port of the data collector 103 and the pipeline 100.

[0068] Specifically, by connecting the test port of the data collector 103 and the pipeline 100 through the winding device 105, the cathodic protection potential data of the pipeline 100 can be transmitted to the data collector 103, so as to analyze the change of the cathodic protection potential of the pipeline 100 based on the cathodic protection potential data of the pipeline 100 and the detection distance between the test port of the data collector 103 and the pipeline 100 in the future.

[0069] Optionally, the cathodic protection potential data of the pipeline 100 can be transmitted to the data collector 103 through the winding device 105, so as to comprehensively judge the effect of the cathodic protection of the pipeline 100 by combining the cathodic protection potential data of the current detection point of the pipeline 100 obtained by the main probe 101 through the data collector 103 in the future.

[0070] The handheld data acquisition analyzer 106 is used to display the cathodic protection potential data of the pipeline 100, the location information of the detection point, the waveform and the system state.

[0071] Optionally, the system state can include at least one of the working state of the data collector 103 and the synchronous current interrupter 104, the connection state of the main probe 101 and the auxiliary probe 102, and the connection state between the winding device 105 and the test port of the data collector 103 and the pipeline 100.

[0072] Optionally, the waveform represents the fluctuation of the cathodic protection potential of the pipeline 100 over time.

[0073] Optionally, the cathodic protection potential data of the pipeline 100 and the location information of the detection point collected by the data collector 103 can be transmitted to the handheld data acquisition analyzer 106. The handheld data acquisition analyzer 106 is connected to the data collector 103 through Bluetooth for communication, obtains the data transmitted by the data collector 103 for display, and displays the fluctuation of the obtained cathodic protection potential and the system state in real time, so as to ensure that the fluctuation of the cathodic protection potential of the pipeline 100 can be displayed in real time during the detection of the pipeline 100, and the running state and the connection state of the detection equipment are normal.

[0074] As can be seen from the above, the handheld data acquisition analyzer 106 can display the cathodic protection potential data of the detection point of the pipeline 100 and the location information of the detection point in real time, which can avoid the error caused by manual recording and improve the detection efficiency of the cathodic protection of the pipeline.

[0075] In some embodiments, the handheld data acquisition analyzer 106 is used to update the location information of the detection point based on a Beidou module and a network real-time kinematic (RTK) algorithm, to obtain the positioning information of the detection point.

[0076] The positioning accuracy of the positioning information is higher than the positioning accuracy of the location information. The positioning accuracy of the positioning information is a centimeter-level positioning accuracy.

[0077] Specifically, the handheld data acquisition analyzer 106 corrects the location information of the detection point collected by the data collector 103 based on the built-in Beidou module and through the network RTK algorithm to improve the positioning accuracy of the detection point, so as to obtain the positioning information of the detection point with higher positioning accuracy.

[0078] Optionally, the Beidou module corrects the position information of the detection point obtained by the data collector 103 through a network RTK algorithm. The Beidou module accesses a Beidou ground-based augmentation network to obtain carrier phase observation values in real time, and updates the position information of the detection point according to the carrier phase observation values to obtain the positioning information of the detection point, thereby improving the positioning accuracy of the position information of the detection point obtained by the data collector 103.

[0079] It should be noted that the Beidou ground-based augmentation network is composed of reference stations distributed in the region, the positions of the reference stations are accurately known, and the reference stations also receive Beidou satellite signals in real time and obtain carrier phase observation values and other related data of the reference stations themselves.

[0080] For example, the Beidou module accesses the Beidou ground-based augmentation network, and performs differential operation on the obtained carrier phase observation values and the carrier phase observation values of the reference stations in the region where the Beidou ground-based augmentation network is located to eliminate or weaken the influence of common error factors such as satellite orbit errors, ionospheric and tropospheric delays. The Beidou module calculates the position of the detection point based on the high-precision carrier phase observation values after differential processing, in combination with the known reference station position information and satellite orbit parameters, to update the position information of the detection point, and finally obtain high-precision positioning information, which can achieve centimeter-level positioning based on Beidou signals.

[0081] As can be seen from the above, the Beidou module built in the data collector 103 obtains the position information of the detection point, and the positioning accuracy of the obtained position information of the detection point can reach sub-meter level. The positioning information of the detection point obtained by the Beidou module built in the handheld data collection analyzer 106 and the network RTK algorithm is updated, and the positioning accuracy can be improved to centimeter level. Therefore, the present application can more effectively determine the abnormal position and area (such as coating damage point) of the cathodic protection potential of the pipeline 100 by improving the positioning accuracy of the detection point. By real-time calculation of the obtained carrier phase observation values based on the network RTK algorithm, the hysteresis of traditional static positioning is avoided, and the continuous detection demand of long-distance pipeline is met.

[0082] In some embodiments, the handheld data collection analyzer 106 is used to generate a soil potential gradient distribution map according to the cathodic protection potential data of the pipeline 100 and the positioning information of the detection point, and mark the positioning information of the cathodic protection potential abnormal area of the pipeline 100 and the corrosion risk level of the pipeline 100.

[0083] Optionally, the soil potential gradient distribution map is used to represent the potential change of different measurement points of the pipeline 100 within a unit distance in geographical position.

[0084] Exemplarily, the handheld data acquisition analyzer 106 can automatically identify the abnormal area of the pipeline 100 by a spatial correlation algorithm (such as a potential gradient calculation and a coordinate offset analysis), in combination with the cathodic protection potential data collected by the data collector 103 and the positioning information of the detection points, to reduce the subjective error of manual identification. The soil potential gradient distribution map can intuitively display the corrosion risk level (such as a high-risk red mark) of the pipeline 100, to guide the maintenance personnel to quickly locate the repair point and shorten the emergency response time. In combination with the positioning information of the detection points and the cathodic protection potential data collected by the data collector 103, a high-precision corrosion evolution model is provided for the whole life cycle management of the pipeline 100. Subsequently, a detection report can be output based on the operation analysis result of the pipeline 100 determined by the handheld data acquisition analyzer 106, to guide the maintenance personnel to formulate a corrosion protection and maintenance strategy for the pipeline 100 based on the analysis result.

[0085] The foregoing is a description of the pipeline cathodic protection potential measurement system based on Beidou satellites, and then a pipeline cathodic protection potential measurement method based on Beidou satellites is introduced.

[0086] The pipeline cathodic protection potential measurement method based on Beidou satellites provided by the embodiments of the present application is applied to a pipeline cathodic protection potential measurement system based on Beidou satellites, such as Figure 2 As shown in the figure, the pipeline cathodic protection potential measurement method based on Beidou satellites includes the following steps.

[0087] S201, initializing the data collector and the handheld data acquisition analyzer.

[0088] Exemplarily, before measuring the cathodic protection potential data of the pipeline to be detected, the data collector and the handheld data acquisition analyzer are first initialized, and the Beidou modules built-in the data collector and the handheld data acquisition analyzer are started. Correspondingly, the Beidou module built-in the synchronous current interrupter is also started after the synchronous current interrupter is powered on. The parameters of the data collector and the handheld data acquisition analyzer are restored to the default, known stable initial state, to lay a foundation for subsequent accurate and reliable measurement work.

[0089] S202, collecting the cathodic protection potential data and the soil potential gradient data of the pipeline along the direction of the pipeline by the main probe and the auxiliary probe.

[0090] Optionally, the soil potential gradient data is obtained by measuring the potential difference of the soil at different positions along the direction of the pipeline to be detected. For example, the main probe and the auxiliary probe are used to measure the cathodic protection potential at different interval points above the pipeline to be detected, and then the cathodic protection potential difference between adjacent measurement points is calculated to reflect the change trend of the cathodic protection potential of the soil around the pipeline to be detected.

[0091] S203. Connect the data acquisition unit and the pipe according to the winding device, and measure and record the detection distance between the data acquisition unit and the pipe.

[0092] Optionally, by using a winding device to obtain the detection distance between the data acquisition unit and the pipeline under inspection, it is possible to accurately pinpoint which segment of the pipeline the cathodic protection potential data collected by the data acquisition unit originates from. This facilitates subsequent correlation of the cathodic protection potential data with the specific pipeline segment and geographical location under inspection, contributing to a more comprehensive understanding of the cathodic protection potential distribution along the pipeline. It provides a locational reference for investigating potential corrosion hazards in the pipeline under inspection and assessing the cathodic protection status of different areas.

[0093] S204. Collect cathodic protection potential data, detection point location information, and time information of the pipeline through a data acquisition device.

[0094] For example, the cathodic protection potential data of the pipeline to be tested can be collected by the data acquisition device. The location information of the detection point can be obtained through the Beidou module built into the data acquisition device, and the data acquisition device can be synchronized with the Beidou system time by relying on the Beidou module to ensure that the local time of the data acquisition device is synchronized with the Beidou system time.

[0095] S205. The synchronous current interruptor controls the on / off of the cathodic protection current of the pipeline based on the Beidou timing signal.

[0096] Optionally, the synchronous current interruptor can obtain the BeiDou timing signal period based on the built-in BeiDou module, and control the on / off of the cathodic protection current based on the BeiDou timing signal period.

[0097] S206. By combining the cathodic protection potential data of the pipeline with the location information of the detection point using a handheld data acquisition and analysis instrument, a pipeline potential distribution map and waveform diagram are generated to identify abnormal areas of the pipeline.

[0098] Optionally, the positioning accuracy of the detection point location information acquired by the data collector can be further improved by using the Beidou module and network RTK algorithm built into the handheld data acquisition and analysis instrument, so as to obtain the location information of the detection point.

[0099] For example, a pipeline potential distribution map can be drawn based on the cathodic protection potential data and the location information of the corresponding detection points (i.e., the location information of the detection points after improving positioning accuracy). A waveform diagram can be drawn using the cathodic protection potential data collected by the data acquisition device and the acquisition time corresponding to each detection point, reflecting the change of the pipeline's cathodic protection potential data over time. Spatial correlation algorithms (such as potential gradient calculation and coordinate offset analysis) can automatically identify abnormal areas, reducing subjective errors from manual interpretation.

[0100] S207, guiding the maintenance personnel to formulate the pipeline corrosion protection maintenance strategy through the output detection report.

[0101] For example, according to the pipeline potential distribution map generated by the handheld data acquisition analyzer in S206, the detection report is generated based on the information of the identified pipeline abnormal area, so as to guide the maintenance personnel to formulate the pipeline corrosion protection maintenance strategy according to the pipeline abnormal information analyzed by the detection report.

[0102] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of the method. In order to realize the above functions, it contains the hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in the present application, the present application can be realized in the form of hardware or the combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0103] The embodiments of the present application can divide the function modules of the pipeline cathodic protection potential measuring device based on Beidou satellite according to the above method examples. For example, each function module can be divided according to each function, or two or more functions can be integrated in one processing module. The above integrated module can be realized in the form of hardware or in the form of software function module. Optionally, the division of the module in the embodiments of the present application is illustrative, and is only a logical function division. When actually implemented, there can be another division method.

[0104] The embodiments of the present application can divide the function modules of the device according to the above method examples. For example, each function module can be divided according to each function, or two or more functions can be integrated in one processing module. The above integrated module can be realized in the form of hardware or in the form of software function module. Optionally, the division of the module in the embodiments of the present application is illustrative, and is only a logical function division. When actually implemented, there can be another division method.

[0105] Figure 3 A structure schematic diagram of a pipeline cathodic protection potential measuring device based on Beidou satellite provided by the embodiments of the present application is shown. As shown in Figure 3 The pipeline cathodic protection potential measuring device based on Beidou satellite includes a communication unit 301 and a processing unit 302.

[0106] The communication unit 301 is used to initialize the data collector and the handheld data acquisition analyzer.

[0107] The processing unit 302 is configured to collect the cathodic protection potential data and the soil potential gradient data of the pipeline along the direction of the pipeline by the main probe and the auxiliary probe.

[0108] The processing unit 302 is further configured to connect the data collector and the pipeline by the winding device, and measure and record the detection distance between the data collector and the pipeline.

[0109] The processing unit 302 is further configured to collect the cathodic protection potential data of the pipeline, the position information of the detection point and the time information by the data collector.

[0110] The processing unit 302 is further configured to control the on-off of the cathodic protection current of the pipeline based on the Beidou timing signal by the synchronous current breaker.

[0111] The processing unit 302 is further configured to generate the pipeline potential distribution map and the waveform map by the handheld data acquisition and analysis instrument in combination with the cathodic protection potential data of the pipeline and the positioning information of the detection point, and identify the abnormal area of the pipeline.

[0112] The processing unit 302 is further configured to guide the maintenance personnel to formulate the pipeline corrosion protection maintenance strategy by the output detection report.

[0113] The embodiment of the present application further provides a computer readable storage medium, which comprises computer execution instructions, and when the computer execution instructions run on the computer, the computer execution instructions make the computer execute the pipeline cathodic protection potential measurement method based on the Beidou satellite provided by the above-mentioned embodiment.

[0114] The embodiment of the present application further provides a computer program, which can be directly loaded into the memory and contains software codes, and the computer program can realize the pipeline cathodic protection potential measurement method based on the Beidou satellite provided by the above-mentioned embodiment after being loaded and executed by the computer.

[0115] Those skilled in the art should be aware that in one or more examples described above, the functions described by the present application can be realized by hardware, software, firmware or any combination thereof. When software is used, the functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes computer readable storage medium and communication medium, wherein the communication medium includes any medium that facilitates the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0116] Those skilled in the art can clearly understand the above-mentioned technical solutions from the description of the above-embodiments. For the convenience and brevity of description, only the division of the above-mentioned functional modules is taken as an example. In actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0117] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner. For example, a plurality of units or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms. The units described as separate components can be or can not be physically separated, and the components shown as units can be one physical unit or a plurality of physical units, that is, they can be located in one place or distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0118] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit. When the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application essentially or the part that makes a contribution to the general technology or the whole or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions to make a device (which can be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the method described in each embodiment of the present application. The storage medium mentioned above includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage medium that can store program codes.

[0119] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pipeline cathodic protection potential measurement system based on BeiDou satellite, characterized in that, include: The device includes a main probe, a secondary probe, a data acquisition unit, a synchronous current interruptor, a winding device, and a handheld data acquisition and analysis instrument; the data acquisition unit, the synchronous current interruptor, and the handheld data acquisition and analysis instrument are equipped with a Beidou module. The main probe is used to contact the ground surface above the pipeline to collect the cathodic protection potential signal of the pipeline; The auxiliary probe is used in conjunction with the main probe to form a soil potential difference measurement circuit; The data acquisition device is used to collect the cathodic protection potential data of the pipeline, and relies on the Beidou module to provide synchronization and time synchronization and obtain the location information of the detection points collected by the data acquisition device; The synchronous current interruptor is used to control the on / off of the cathodic protection current of the pipeline, and performs synchronous on / off operation based on the Beidou timing signal obtained by the Beidou module. The winding device is used to connect the test port of the data acquisition device and the pipe, and to obtain the detection distance between the test port of the data acquisition device and the pipe; The handheld data acquisition and analysis instrument is used to display the cathodic protection potential data of the pipeline, the location information of the detection point, the waveform, and the system status.

2. The system according to claim 1, characterized in that, The BeiDou module is a dual-frequency BeiDou module.

3. The system according to claim 1, characterized in that, The handheld data acquisition and analysis instrument is used to update the location information of the detection point based on the Beidou module and the network real-time dynamic differential RTK algorithm to obtain the positioning information of the detection point; the positioning accuracy of the positioning information is higher than that of the location information; the positioning accuracy of the positioning information is at the centimeter level.

4. The system according to claim 1, characterized in that, The BeiDou module is used to receive the BeiDou timing signal sent by the BeiDou satellite, and to calibrate the clock deviation of the synchronous current interruptor, the handheld data acquisition analyzer and the data acquisition unit through the BeiDou timing signal.

5. The system according to claim 1, characterized in that, The handheld data acquisition and analysis instrument is used to generate a soil potential gradient distribution map based on the cathodic protection potential data of the pipeline and the location information of the detection point, and to mark the location information of the abnormal cathodic protection potential area of ​​the pipeline and the corrosion risk level of the pipeline.

6. A method for measuring the cathodic protection potential of pipelines based on BeiDou satellite, characterized in that, The method applied to the pipeline cathodic protection potential measurement system based on BeiDou satellite as described in any one of claims 1-5, the method comprising: Initialize the data acquisition unit and handheld data acquisition and analysis instrument; Cathodic protection potential data and soil potential gradient data of the pipeline were collected along the pipeline using the main probe and the auxiliary probe. The data acquisition device and the pipe are connected by a winding device, and the detection distance between the data acquisition device and the pipe is measured and recorded. The cathodic protection potential data, detection point location information, and time information of the pipeline are collected by a data acquisition device. The synchronous current interruptor controls the on / off of the cathodic protection current of the pipeline based on the Beidou timing signal; By combining the cathodic protection potential data of the pipeline with the location information of the detection points, the handheld data acquisition and analysis instrument generates a pipeline potential distribution map and waveform diagram to identify abnormal areas of the pipeline. The output test reports guide maintenance personnel in developing pipeline corrosion protection and maintenance strategies.

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