A data recorder

Abstract

The present application discloses a data recorder that integrates a memory, a main controller, a multi-channel analog-to-digital converter, a millivolt terminal, a common reference terminal, a voltage terminal, and a voltage-current terminal into one device, thereby integrating multiple monitoring modes. Only one device is required to complete the tasks of multiple monitoring modes such as decoupler monitoring and constant potentiostat monitoring, thereby reducing equipment procurement, maintenance and operating costs and greatly improving economic benefits. The unique four-terminal design (millivolt terminal, common reference terminal, voltage terminal, and voltage-current terminal) and optimized wiring method greatly simplify the equipment wiring process. A unified data collection method is used to ensure that all monitoring data is acquired and recorded within the same time frame, laying a solid foundation for subsequent accurate assessment of pipeline corrosion status, helping engineers accurately judge the operating status of pipeline cathodic protection systems, promptly identify potential corrosion risks, and improve pipeline safety management.

Description

Technical Field

[0001] The present application relates to the field of data processing technology, and in particular to a data recorder. Background Art

[0002] In the field of buried steel pipeline corrosion protection, corrosion problems primarily stem from microscopic galvanic cells and stray current interference corrosion. Microscopic galvanic cells, caused by uneven material or environmental factors, form tiny electrochemical corrosion cells on the pipeline's metal surface, creating anode and cathode areas and inducing localized corrosion. Stray current interference corrosion, on the other hand, occurs when current generated by an external electrical system is conducted to the pipeline, causing electrochemical corrosion and accelerating pipeline damage.

[0003] Cathodic protection technology is often used to prevent corrosion from microscopic galvanic cells or DC stray current interference. This technology maintains a negative potential in the pipeline by applying an external current or using sacrificial anodes. AC stray current interference is treated by using decoupling and DC isolation devices. Evaluating the effectiveness of corrosion protection requires monitoring the pipeline's polarization potential, AC and DC current densities, and the status of related facilities. While existing instruments offer these measurements, they have numerous limitations.

[0004] Some existing recorders have single functions and cannot meet complex testing requirements; multiple devices are required to monitor the decoupler, the wiring is complicated, and it is difficult for workers to operate; it is impossible to monitor the voltage at the feedback end of the constant potential instrument; the input voltage range is large, and the current measurement accuracy through the shunt is low. These defects seriously restrict the efficient implementation of pipeline corrosion protection monitoring work.

[0005] It is understandable that the shortcomings of the prior art are:

[0006] (1) Using multiple devices results in high costs:

[0007] In the prior art, in order to monitor the decoupler, two or more independent electrochemical test instruments are usually required, which significantly increases the procurement, maintenance and operation costs of the equipment and increases the overall cost of the project.

[0008] (2) Complex wiring and difficult on-site implementation:

[0009] The use of multiple devices requires complex wiring configurations. Workers need to connect multiple instruments to pipes and electrodes for each measurement. This complex wiring method makes on-site operations more difficult, especially in harsh construction environments. It is easy to cause wiring errors and affect the reliability of test results.

[0010] (3) Data time is difficult to synchronize and difficult to merge and analyze:

[0011] When different devices are collecting data for a long time, due to different clock sources, the time synchronization performance of data recording will deteriorate, and the data cannot be effectively compared and analyzed. As a result, when conducting a comprehensive assessment of the corrosion status, data is collected for a long time, but the data cannot be synchronously merged, which may lead to misjudgment or omission of important information generated by synchronization, affecting the judgment of the working status of the decoupler.

[0012] Therefore, a new device for recording cathodic protection data is needed urgently. Summary of the Invention

[0013] The present application provides a data recorder that can improve the cost-effectiveness of data recording, making data recording operation convenient and efficient, and the data accurate and reliable. It effectively solves the problems of difficult time synchronization and combined analysis of data from different devices in the existing technology, lays a solid foundation for subsequent accurate assessment of pipeline corrosion status, helps engineers accurately judge the operating status of pipeline cathodic protection systems, promptly discover potential corrosion risks, and improve pipeline safety management.

[0014] In a first aspect, the present application provides a data recorder, comprising a memory, a main controller, a multi-channel analog-to-digital converter, a millivolt terminal, a common reference terminal, a voltage terminal, and a voltage-current terminal; wherein the memory is connected to the main controller, the main controller is connected to the multi-channel analog-to-digital converter, and the multi-channel analog-to-digital converter is respectively connected to the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal;

[0015] The main controller is used to configure the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal according to the target monitoring mode, and to collect data information of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal through the multi-channel analog-to-digital converter, store the data information in the memory, and generate a monitoring result corresponding to the target monitoring mode based on the data information;

[0016] The memory is used to store the data information and the monitoring results corresponding to the target monitoring mode;

[0017] The multi-channel analog-to-digital converter is used to collect data information of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal in the target monitoring mode; wherein the multi-channel analog-to-digital converter includes a plurality of analog front ends;

[0018] The millivolt terminal is used to collect voltage at the millivolt level;

[0019] The common reference terminal is used to connect to the ground point GND of each analog front end to form a reference loop of the multiple analog front ends;

[0020] The voltage terminal is used to collect voltage of volt level voltage;

[0021] The voltage and current terminal is used to measure current or voltage.

[0022] Optionally, the multiple analog front ends include a first voltage analog front end, a second voltage analog front end, a third voltage analog front end and a current analog front end; the first voltage analog front end is connected to the millivolt end, the second voltage analog front end is connected to the voltage end, the third voltage analog front end and the current analog front end are both connected to the voltage and current ends through analog switches, and the analog switches are used to switch the connection between the voltage and current ends and the third voltage analog front end and the current analog front end.

[0023] Optionally, the target monitoring mode is a test piece monitoring mode; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes:

[0024] Configuring the millivolt terminal to be suspended;

[0025] Configuring the common reference terminal to connect to the test piece;

[0026] Configuring the voltage terminal to be connected to a reference electrode;

[0027] The voltage and current end is configured to be connected to a metal pipeline for transporting oil and gas to be tested; wherein, if the analog switch is connected to the current simulation front end, the voltage and current end measures the current between the test piece and the metal pipeline; if the analog switch is connected to the third voltage simulation front end, the voltage and current end measures the voltage between the test piece and the metal pipeline, and uses the voltage as the voltage difference between the test piece and the reference electrode.

[0028] Optionally, the target monitoring mode is a dual-potential monitoring mode; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal includes:

[0029] Configuring the millivolt terminal to be suspended;

[0030] Configuring the common reference terminal to be connected to a reference electrode;

[0031] Configuring the voltage terminal to connect to a first potential monitoring point of the object to be detected;

[0032] The voltage and current end is configured to be connected to the second potential monitoring point of the object to be detected; wherein, the analog switch is connected to the third voltage analog front end, and the voltage and current end measures the voltage between the first potential monitoring point and the second potential monitoring point.

[0033] Optionally, the target monitoring mode is a decoupler monitoring mode; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal includes:

[0034] The millivolt terminal is connected to one end of the decoupler connected to the pipeline; wherein one end of the decoupler is connected to the pipeline through a shunt, and the other end of the decoupler is connected to the ground bed; the shunt is used to convert the current into a millivolt voltage drop across the shunt, which is then measured through the millivolt terminal;

[0035] configuring the common reference end to be connected to the pipeline;

[0036] Configuring the voltage terminal to be connected to a reference electrode;

[0037] The voltage and current terminal is configured to be connected to the ground bed; wherein, when the analog switch is connected to the third voltage analog front end, the voltage and current terminal measures the voltage between the reference electrode and the ground bed.

[0038] Optionally, the target monitoring mode is a potentiostat monitoring mode; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal includes:

[0039] The millivolt terminal is connected to the cathode of the potentiostat and to the pipeline through a shunt; the shunt is used to convert the current into a millivolt voltage drop across the shunt, which is then measured through the millivolt terminal;

[0040] configuring the common reference end to be connected to the pipeline;

[0041] Configuring the voltage terminal to be connected to a reference electrode;

[0042] The voltage and current end is configured to be connected to the energized point of the potentiostat, and the energized point of the potentiostat is connected to the pipeline; wherein the analog switch is connected to the third voltage analog front end, and the voltage and current end measures the voltage between the reference electrode and the energized point relative to the pipeline.

[0043] Optionally, the target monitoring mode is a synchronous on-off mode; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal includes:

[0044] Configuring the millivolt terminal to be suspended;

[0045] Configuring the common reference end to be connected to a metal pipeline for transporting oil and gas to be tested;

[0046] Configuring the voltage terminal to be connected to a reference electrode;

[0047] Configure the voltage and current terminals to be left floating

[0048] The voltage of the reference electrode and the metal pipe is collected through Beidou satellite synchronous timing to monitor the potential.

[0049] Optionally, the target monitoring mode is a data line pattern recognition mode, and the data recorder further includes a data port; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes:

[0050] The millivolt terminal and the common reference terminal are connected to the test piece, and the voltage terminal, the voltage and current terminal, and the data port are all connected to the in-line EEPROM of the single bus built into the data line to be tested;

[0051] The data port reads the contents of the in-line EEPROM via a single bus, identifies the serial number and mode corresponding to the data line based on the contents, and implements mode and harness matching based on the serial number and mode corresponding to the data line.

[0052] Optionally, the target monitoring mode is an automatic calibration mode, and the data recorder further includes a data port; and the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes:

[0053] The millivolt terminal, the common reference terminal connected to the test piece, the voltage terminal, the voltage-current terminal, and the data port are all connected to the calibration source through a connecting harness;

[0054] configuring the connection harness to perform single bus communication via the data port and identifying a calibration source connection;

[0055] For each port in the data recorder, the calibration controller in the calibration source controls the connection status of the output voltage and current reference according to time; the calibration source controls the data recorder to enter a preset calibration mode, the calibration source outputs a reference voltage value or a reference current value, and notifies the data recorder to record the reference voltage value or the reference current value through the connecting harness and the data port, and automatically calibrates the port according to the voltage value or current value of the port and the reference voltage value or the reference current value.

[0056] Optionally, the multi-channel analog-to-digital converter is an 8-channel analog-to-digital converter.

[0057] Compared with the prior art, the present application provides a data recorder, which has the following beneficial effects:

[0058] Significant cost-effectiveness: This application integrates memory, a main controller, a multi-channel analog-to-digital converter, a millivolt terminal, a common reference terminal, a voltage terminal, and a voltage-current terminal into one device, integrating multiple monitoring modes into one. Only one device is needed to complete multiple monitoring modes such as decoupler monitoring and constant potentiostat monitoring. This replaces the previous situation where multiple independent electrochemical test instruments were required, significantly reducing equipment procurement, maintenance, and operating costs, greatly improving economic benefits, and providing an effective means for enterprises to reduce pipeline corrosion protection monitoring costs;

[0059] Convenient and efficient operation: With a unique four-terminal design (i.e., millivolt terminal, common reference terminal, voltage terminal, and voltage / current terminal) and an optimized wiring method, the voltage / current terminal is equipped with an analog switch to switch the working mode, which greatly simplifies the equipment wiring process. The difficulty of operation for on-site workers is significantly reduced, effectively avoiding errors caused by complex wiring, improving installation and testing efficiency, ensuring the smooth progress of monitoring work, and reducing downtime and resource waste caused by operational errors;

[0060] Accurate and reliable data: A unified data collection method is used to ensure that all monitoring data is acquired and recorded within the same time frame. This effectively solves the problems of time synchronization and combined analysis of data from different devices in existing technologies. It lays a solid foundation for subsequent accurate assessment of pipeline corrosion status, helps engineers accurately judge the operating status of pipeline cathodic protection systems, promptly identify potential corrosion risks, and improve pipeline safety management.

[0061] The further effects of the above-mentioned non-conventional preferred embodiment will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the present application or the existing technical solutions, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0063] Figure 1 A schematic structural diagram of a data recorder provided in one embodiment of the present application;

[0064] Figure 2 A connection diagram of a data recorder in a test piece monitoring mode provided by an embodiment of the present application;

[0065] Figure 3 A connection diagram of a data recorder in a dual-potential monitoring mode provided by an embodiment of the present application;

[0066] Figure 4A connection diagram of a data recorder in a decoupler monitoring mode provided by an embodiment of the present application;

[0067] Figure 5 A schematic diagram of the connection of a data logger in a potentiostat monitoring mode provided by an embodiment of the present application;

[0068] Figure 6 A connection diagram of a data recorder in a synchronous on-off mode provided by an embodiment of the present application;

[0069] Figure 7 A connection diagram of a data recorder in a data line pattern recognition mode provided by an embodiment of the present application;

[0070] Figure 8 A connection diagram of a data recorder in automatic calibration mode provided by one embodiment of the present application. DETAILED DESCRIPTION

[0071] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0072] Various non-limiting embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0073] Prior art monitoring of decouplers in pipeline cathodic protection systems typically requires the use of multiple independent electrochemical test instruments, such as one for dual-potential monitoring and another for current monitoring. This multi-device approach not only increases equipment investment costs but also complicates wiring and operation, making it difficult for field workers to implement. Using two devices also presents challenges in merging data from the two devices. Furthermore, any time difference between the two devices significantly reduces the reliability of the data.

[0074] The decoupler in a pipeline cathodic protection system is a critical component for ensuring proper system operation, requiring real-time monitoring of its performance. However, existing multi-device monitoring solutions not only increase operational complexity but can also affect monitoring continuity and accuracy due to coordination issues between devices.

[0075] To address these issues, this application proposes a miniaturized, multifunctional data logger that integrates test strip monitoring, dual-potential monitoring, decoupler monitoring, potentiostat monitoring, and synchronized on-off measurement. Through innovative wiring methods, it enables comprehensive monitoring of pipeline cathodic protection systems using a single device and four terminals. This not only simplifies wiring and operation, but also ensures the consistency of monitoring data, improving the convenience and reliability of testing.

[0076] See also Figure 1 , shows a data recorder in an embodiment of the present application, the data recorder includes a memory, a main controller, a multi-channel analog-to-digital converter (for example, the multi-channel analog-to-digital converter can be an 8-channel analog-to-digital converter, i.e., 8CHADC), a millivolt terminal, a common reference terminal, a voltage terminal, and a voltage-current terminal; wherein, the memory is connected to the main controller, the main controller is connected to the multi-channel analog-to-digital converter, and the multi-channel analog-to-digital converter is respectively connected to the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal.

[0077] The main controller is used to configure the monitoring connection mode of the millivolt end, the common reference end, the voltage end and the voltage-current end according to the target monitoring mode, and to collect data information of the millivolt end, the common reference end, the voltage end and the voltage-current end through the multi-channel analog-to-digital converter, store the data information in the memory, and generate the monitoring result corresponding to the target monitoring mode based on the data information. It should be noted that the data information of the millivolt end, the common reference end, the voltage end and the voltage-current end collected by the multi-channel analog-to-digital converter is cathodic protection data, that is, the data recorder of the present application is a data recorder that records cathodic protection data; cathodic protection data generally refers to cathodic protection data. Cathodic protection is an electrochemical protection technology that prevents metals from corroding in an electrolyte environment. It is widely used in the corrosion protection of metal pipelines, storage tanks, docks and other facilities in the fields of petroleum, natural gas, chemical industry, marine engineering, municipal engineering, etc., and cathodic protection data are all kinds of monitoring and recording data involved in the cathodic protection process.

[0078] The memory is used to store the data information and the monitoring results corresponding to the target monitoring mode. The multi-channel analog-to-digital converter is used to collect data information of the millivolt end, the common reference end, the voltage end and the voltage-current end under the target monitoring mode. The multi-channel analog-to-digital converter includes multiple analog front ends. The millivolt end is used to collect voltage quantities at the millivolt level. The common reference end is used to connect to the ground point GND of each analog front end to form a reference loop for the multiple analog front ends. The voltage end is used to collect voltage quantities at the volt level. The voltage-current end is used to measure current or voltage.

[0079] In one implementation, Figure 1 As shown, the multiple analog front ends include a first voltage analog front end (i.e., voltage analog front end 1), a second voltage analog front end (i.e., voltage analog front end 2), a third voltage analog front end (i.e., voltage analog front end 3) and a current analog front end; the first voltage analog front end is connected to the millivolt end, the second voltage analog front end is connected to the voltage end, the third voltage analog front end and the current analog front end are both connected to the voltage and current end through an analog switch, and the analog switch is used to switch the connection between the voltage and current end and the third voltage analog front end and the current analog front end.

[0080] It is understood that the data logger of the present application has four terminals, which are defined as follows: ① millivolt terminal (mV), ② common reference terminal (Ref), ③ voltage terminal 1 (V1), and ④ voltage and current terminal 2 (VA2).

[0081] Figure 1 The overall internal structure of the recorder and the connection relationship between each functional module mainly include the following parts: Memory: used to store recorded data. Main controller: responsible for the control of the entire system, including ADC readout and data storage, workflow control, etc. It should be noted that the recorder has an internal clock source. Based on the clock source and the configuration before acquisition, the recorder can obtain a workflow. For example, one cycle is every 10 seconds, where the current value is collected in the first second, two voltage values are collected in the second second, and the rest of the time is idle. Under this workflow, the recorder will collect data in a preset configuration and store it in memory. 8CHADC: 8-channel analog-to-digital converter, which can read 8 analog quantities simultaneously.

[0082] Voltage Analog Front-End 1: Millivolt voltage input, specifically designed for monitoring millivolt-level voltages. This terminal is equivalent to the millivolt terminal on a multimeter. This terminal can acquire millivolt-level voltages, for example, in scenarios such as measuring shunt voltage drops.

[0083] Voltage Analog Front Ends 2 and 3: Voltage inputs, used to monitor volt-level voltages. These terminals are equivalent to the V terminal on a multimeter and can measure V-level voltages. Voltages such as pipe-to-ground potential can reach tens of volts, so a V-level voltage terminal is required to connect to the target to be measured and collect this voltage.

[0084] The common reference terminal is equivalent to GND, which is the zero-level reference for each analog front end. All voltage or current values are zero-referenced to this terminal. Therefore, this terminal is the reference return path for each analog front end and is connected to the GND of each analog front end.

[0085] Current analog front end: mA current input, dedicated to monitoring mA-level current.

[0086] Analog switch: used to switch the working mode of terminal ④, that is, to switch the analog switch to input current or input voltage, specifically to measure current or voltage. Figure 1 As shown, when the upper part of the switch is turned on, that is, when the voltage analog front end is connected, the terminal can measure the voltage value. When the lower part of the switch is turned on, that is, when the current analog front end is connected, the terminal can measure the current value instead of the voltage value.

[0087] The main controller controls the timing, allowing the ADC to simultaneously collect the DC voltage and AC voltage RMS values output by each analog front-end, totaling eight data points, and store them in memory. Specifically, the main controller can read measurement data from the 8-channel ADC using a specific protocol. If, as configured by the engineer, the cycle is 10 seconds, with voltage readout in the first second and current readout in the second, with the remaining cycles inactive, the main controller will save the voltage value after the first second and the current value after the second second.

[0088] In one implementation, Figure 2 As shown, the target monitoring mode is a test piece monitoring mode; the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal and the voltage and current terminal includes:

[0089] Configuring the millivolt terminal to be suspended;

[0090] Configuring the common reference terminal to connect to the test piece;

[0091] Configuring the voltage terminal to be connected to a reference electrode;

[0092] The voltage and current end is configured to be connected to a metal pipeline for transporting oil and gas to be tested; wherein, if the analog switch is connected to the current simulation front end, the voltage and current end measures the current between the test piece and the metal pipeline; if the analog switch is connected to the third voltage simulation front end, the voltage and current end measures the voltage between the test piece and the metal pipeline, and uses the voltage as the voltage difference between the test piece and the reference electrode.

[0093] For this connection method, the millivolt end is left floating, the common reference end is connected to the test piece, the voltage end 1 is connected to the reference electrode, and the voltage and current end 2 is connected to the pipeline (i.e., the pipeline end to be tested in the project, specifically the metal pipeline for transporting oil and gas). It can be understood that the common reference end is equivalent to the reference loop of ends 1-3, which is internally connected to the ground of each analog front end. At this time, if the analog switch is connected to the current end, the current between the test piece and the pipeline is measured. If the analog switch is connected to the voltage end 3 (i.e., the third voltage analog front end), the voltage from the test piece to the pipeline can be measured, and then the voltage of the test piece to the reference can be obtained. The voltage of the test piece to the reference is the voltage difference between the two, which can also be understood as the reading when the positive pole of the voltmeter is connected to the test piece and the negative pole is connected to the reference.

[0094] In one implementation, Figure 3 As shown, the target monitoring mode is a dual-potential monitoring mode; the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal and the voltage-current terminal includes:

[0095] Configuring the millivolt terminal to be suspended;

[0096] Configuring the common reference terminal to be connected to a reference electrode;

[0097] Configuring the voltage terminal to connect to a first potential monitoring point of the object to be detected;

[0098] The voltage and current end is configured to be connected to the second potential monitoring point of the object to be detected; wherein, the analog switch is connected to the third voltage analog front end, and the voltage and current end measures the voltage between the first potential monitoring point and the second potential monitoring point.

[0099] With this connection method, leave the millivolt terminal floating, connect the common reference terminal to a reference electrode, and switch the analog switch to the voltage terminal to simultaneously record two potential monitoring inputs. These two inputs are Potential Monitoring Point 1 and Potential Monitoring Point 2. Dual potential monitoring points simultaneously record two potential values, allowing comparison of the voltages at both ends. If the voltages at both ends, which should be insulated, are measured simultaneously, there should be a noticeable difference in the voltage changes. If the voltages show the same trend, it can be considered that the insulation has failed or is inadequate.

[0100] In one implementation, Figure 4 As shown, the target monitoring mode is a decoupler monitoring mode; the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes:

[0101] The millivolt terminal is connected to an end of a decoupler connected to a pipeline (i.e., an end of the pipeline to be measured in the project, specifically a metal pipeline for transporting oil and gas); wherein one end of the decoupler is connected to the pipeline via a shunt, and the other end of the decoupler is connected to the ground bed; the shunt is used to convert the current into a millivolt-level voltage drop across the shunt, which is then measured via the millivolt terminal;

[0102] configuring the common reference end to be connected to the pipeline;

[0103] Configuring the voltage terminal to be connected to a reference electrode;

[0104] The voltage and current terminal is configured to be connected to the ground bed; wherein, when the analog switch is connected to the third voltage analog front end, the voltage and current terminal measures the voltage between the reference electrode and the ground bed.

[0105] For this connection method, the millivolt end is connected to the terminal of the decoupler facing the pipeline, the common reference end is connected to the pipeline, and a shunt device is connected in series. The decoupler is set between the pipeline and the drainage bed. The shunt can convert large currents (generally ampere-level currents, such as 1A, 3A, 30A) into millivolt-level voltage drops across the shunt, which are measured through the millivolt end of the instrument. That is, the shunt can be converted into a millivolt-level voltage drop. At the same time, voltage terminal 1 is connected to the reference electrode, and voltage and current terminal 2 is connected to the bed. At this time, the analog switch is switched to the voltage terminal (i.e., the third voltage analog front end), which is equivalent to simultaneously measuring the potential of the reference electrode and the bed. This connection method reduces the number of pins used for decoupler monitoring, simplifies the connection, and can synchronously collect data from each channel.

[0106] In one implementation, Figure 5 As shown, the target monitoring mode is a potentiostat monitoring mode; the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal and the voltage and current terminal includes:

[0107] The millivolt terminal is connected to the cathode of the potentiostat and is connected to the pipeline (i.e., the pipeline end to be measured in the project, specifically a metal pipeline for transporting oil and gas) through a shunt; the shunt is used to convert the current into a millivolt-level voltage drop across the shunt, which is then measured through the millivolt terminal;

[0108] configuring the common reference end to be connected to the pipeline;

[0109] Configuring the voltage terminal to be connected to a reference electrode;

[0110] The voltage and current end is configured to be connected to the energized point (i.e., zero position) of the potentiostat, and the energized point of the potentiostat is connected to the pipeline; wherein, the analog switch is connected to the third voltage analog front end, and the voltage and current end measures the voltage between the reference electrode and the energized point relative to the pipeline.

[0111] In this connection method, the millivolt terminal is connected to the potentiostat output terminal (i.e., cathode), the common reference terminal is connected to the pipeline, and a shunt device is connected in series. The shunt converts high current into a millivolt-level voltage drop across the shunt, which is measured by the instrument's millivolt terminal. Simultaneously, voltage terminal 1 is connected to the reference electrode, and voltage / current terminal 2 measures the potential at the energized point. At this point, switching the analog switch to the voltage terminal is equivalent to simultaneously measuring the potential of the reference electrode and the energized point relative to the pipeline. This connection method allows for direct monitoring of the potentiostat's operating status.

[0112] In one implementation, Figure 6 As shown, the target monitoring mode is a synchronous on-off mode; the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal and the voltage-current terminal includes:

[0113] Configuring the millivolt terminal to be suspended;

[0114] Configuring the common reference end to be connected to a metal pipeline for transporting oil and gas to be tested;

[0115] Configuring the voltage terminal to be connected to a reference electrode;

[0116] Configure the voltage and current terminals to be left floating

[0117] The voltage of the reference electrode and the metal pipe is collected through Beidou satellite synchronous timing to monitor the potential.

[0118] This connection method allows for BeiDou satellite timing synchronization to collect reference and pipeline voltages, monitoring pipeline potential. Using these connection methods, the data logger can simultaneously collect multiple data points. Different connection methods expand the logger's functionality to meet diverse needs in the cathodic protection field.

[0119] In one implementation, Figure 7 As shown, the target monitoring mode is a data line pattern recognition mode, and the data recorder further includes a data port; the monitoring connection mode of configuring the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes:

[0120] The millivolt terminal and the common reference terminal are connected to the test piece, and the voltage terminal, the voltage and current terminal, and the data port are all connected to the in-line EEPROM of the single bus built into the data line to be tested;

[0121] The data port reads the contents of the in-line EEPROM via a single bus, identifies the serial number and mode corresponding to the data line based on the contents, and implements mode and harness matching based on the serial number and mode corresponding to the data line.

[0122] It should be noted that the data logger has a variety of connection cable types for different measurement modes. The cable model and corresponding mode can be automatically identified by a newly added data terminal (i.e., data port). The test cable has a built-in single-wire EEPROM. The data logger detects the cable connection and powers on. After powering on, the contents of the EEPROM are read via the D0 terminal (i.e., data port) via a single wire, thereby identifying the cable's serial number and mode, and thus achieving mode and wiring harness matching. If a test cable corresponding to mode 1 is inserted, three terminal leads are ultimately labeled test piece, reference, and pipeline. This reduces the connection burden for field engineers and effectively prevents equipment damage caused by incorrect connections.

[0123] In one implementation, Figure 8 As shown, the target monitoring mode is an automatic calibration mode, and the data recorder further includes a data port; the monitoring connection mode of configuring the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes:

[0124] The millivolt terminal, the common reference terminal connected to the test piece, the voltage terminal, the voltage-current terminal, and the data port are all connected to the calibration source through a connecting harness;

[0125] configuring the connection harness to perform single bus communication via the data port and identifying a calibration source connection;

[0126] For each port in the data recorder, the calibration controller in the calibration source controls the connection status of the output voltage and current reference according to time; the calibration source controls the data recorder to enter a preset calibration mode, the calibration source outputs a reference voltage value or a reference current value, and notifies the data recorder to record the reference voltage value or the reference current value through the connecting harness and the data port, and automatically calibrates the port according to the voltage value or current value of the port and the reference voltage value or the reference current value.

[0127] It should be noted that the recorder can achieve automatic calibration using the calibration source connection cable. The connection harness communicates via a single bus through the D0 port, identifying the calibration source connection. The calibration controller then controls the output reference on and off based on time. The calibration source can also control the recorder to enter a specific calibration mode. The calibration source then outputs a reference voltage or current value, which is then transmitted via the bus to the recorder to record. By traversing this reference source output across all ports, new recorders can achieve automatic calibration. Because instrument accuracy drifts over time, this automatic calibration feature is particularly valuable for new recorders used in long-term projects. For example, calibration no longer requires a return to the factory or specialized personnel, significantly improving device efficiency.

[0128] In summary, the present application proposes a miniaturized multifunctional data recorder having four terminals: ① millivolt terminal (mV), ② common reference terminal (Ref), ③ voltage terminal 1 (V1), ④ voltage and current terminal 2 (VA2). Among them, terminal ④ is a multiplex of voltage terminal 2 and current terminal. At the same time, by switching the analog switch inside the machine, four data can be collected synchronously. Combined with the innovation of the wiring method, the following functions are realized: test piece monitoring mode, dual potential monitoring mode, decoupler monitoring mode, constant potentiostat monitoring, synchronous on-off mode and other functions. While ensuring the test accuracy, single-machine measurement, miniaturization and multi-functional integration are realized.

[0129] In other words, firstly, by integrating multiple monitoring functions into one device, a single device can meet the monitoring needs of different scenarios, significantly reducing equipment investment costs. Compared with the existing technology that requires the use of multiple independent instruments, the single-machine solution of the present invention significantly improves economic efficiency.

[0130] Secondly, this application optimizes the wiring design, reducing the number of terminals to just four, and uses analog switches and different wiring designs to switch between different operating modes. This simplified wiring method makes it easier for on-site workers to install and operate the equipment, greatly reducing the risk of testing caused by wiring errors and improving work efficiency.

[0131] Furthermore, this application utilizes a unified data acquisition instrument to ensure that all monitoring data is collected and recorded within the same timeframe. This synchronized acquisition mechanism effectively addresses the existing issue of data consolidation and analysis between different devices, providing reliable data support for subsequent comprehensive assessments of pipeline corrosion status.

[0132] In summary, the present application has significant advantages in reducing costs, simplifying wiring, improving data synchronization, etc., and effectively solves the shortcomings of the existing technology.

[0133] Therefore, compared with the prior art, the data recorder provided by this application has the following beneficial effects:

[0134] Significant cost-effectiveness: This application integrates memory, a main controller, a multi-channel analog-to-digital converter, a millivolt terminal, a common reference terminal, a voltage terminal, and a voltage-current terminal into one device, integrating multiple monitoring modes into one. Only one device is needed to complete multiple monitoring modes such as decoupler monitoring and constant potentiostat monitoring. This replaces the previous situation where multiple independent electrochemical test instruments were required, significantly reducing equipment procurement, maintenance, and operating costs, greatly improving economic benefits, and providing an effective means for enterprises to reduce pipeline corrosion protection monitoring costs;

[0135] Convenient and efficient operation: With a unique four-terminal design (i.e., millivolt terminal, common reference terminal, voltage terminal, and voltage / current terminal) and an optimized wiring method, the voltage / current terminal is equipped with an analog switch to switch the working mode, which greatly simplifies the equipment wiring process. The difficulty of operation for on-site workers is significantly reduced, effectively avoiding errors caused by complex wiring, improving installation and testing efficiency, ensuring the smooth progress of monitoring work, and reducing downtime and resource waste caused by operational errors;

[0136] Accurate and reliable data: A unified data collection method is used to ensure that all monitoring data is acquired and recorded within the same time frame. This effectively solves the problems of time synchronization and combined analysis of data from different devices in existing technologies. It lays a solid foundation for subsequent accurate assessment of pipeline corrosion status, helps engineers accurately judge the operating status of pipeline cathodic protection systems, promptly identify potential corrosion risks, and improve pipeline safety management.

[0137] In other words, this application can achieve the following technical effects:

[0138] Reduce costs: By integrating multiple monitoring modes, users only need to purchase one device to meet multiple monitoring needs, significantly reducing equipment investment costs.

[0139] Simplified wiring improves on-site implementation efficiency: By optimizing the device structure and interface design, the complexity of wiring is reduced, making it easier for on-site workers to install and operate the equipment, and reducing the testing risks caused by wiring errors.

[0140] Realize synchronous data collection to facilitate combined analysis: Ensure that all monitoring data are collected and recorded within the same time frame, which facilitates subsequent data analysis and comprehensive evaluation, thereby improving the accuracy of judgment on pipeline corrosion status.

[0141] In summary, this application can effectively improve the efficiency and accuracy of pipeline cathodic protection monitoring and meet the industry's demand for high-performance monitoring equipment.

[0142] The various embodiments in this application are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, the device embodiments are generally similar to the system embodiments, so the description is relatively simple. For relevant parts, refer to the partial description of the system embodiments.

[0143] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, system, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, system, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a..." does not preclude the presence of other identical elements in the process, system, commodity, or apparatus that includes the element.

[0144] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A data recorder, characterized in that: The data recorder includes a memory, a main controller, a multi-channel analog-to-digital converter, a millivolt terminal, a common reference terminal, a voltage terminal, and a voltage-current terminal; wherein the memory is connected to the main controller, the main controller is connected to the multi-channel analog-to-digital converter, and the multi-channel analog-to-digital converter is respectively connected to the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal; The main controller is used to configure the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal according to the target monitoring mode, and to collect data information of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal through the multi-channel analog-to-digital converter, store the data information in the memory, and generate a monitoring result corresponding to the target monitoring mode based on the data information; The memory is used to store the data information and the monitoring results corresponding to the target monitoring mode; The multi-channel analog-to-digital converter is used to collect data information of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage-current terminal in the target monitoring mode; wherein the multi-channel analog-to-digital converter includes a plurality of analog front ends; The millivolt terminal is used to collect voltage at the millivolt level; The common reference terminal is used to connect to the ground point GND of each analog front end to form a reference loop of the multiple analog front ends; The voltage terminal is used to collect voltage of volt level; The voltage and current terminal is used to measure current or voltage; The multiple analog front ends include a first voltage analog front end, a second voltage analog front end, a third voltage analog front end and a current analog front end; the first voltage analog front end is connected to the millivolt end, the second voltage analog front end is connected to the voltage end, the third voltage analog front end and the current analog front end are both connected to the voltage and current end through an analog switch, and the analog switch is used to switch the connection between the voltage and current end and the third voltage analog front end and the current analog front end.

2. The data recorder according to claim 1, characterized in that The target monitoring mode is a test piece monitoring mode; The configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: Configuring the millivolt terminal to be suspended; Configuring the common reference terminal to connect to the test piece; configuring the voltage terminal to be connected to a reference electrode; The voltage and current end is configured to be connected to a metal pipeline for transporting oil and gas to be tested; wherein, if the analog switch is connected to the current simulation front end, the voltage and current end measures the current between the test piece and the metal pipeline; if the analog switch is connected to the third voltage simulation front end, the voltage and current end measures the voltage between the test piece and the metal pipeline, and uses the voltage as the voltage difference between the test piece and the reference electrode.

3. The data recorder according to claim 1, characterized in that The target monitoring mode is a dual potential monitoring mode; The configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: Configuring the millivolt terminal to be suspended; Configuring the common reference terminal to be connected to a reference electrode; Configuring the voltage terminal to connect to a first potential monitoring point of the object to be detected; The voltage and current end is configured to be connected to the second potential monitoring point of the object to be detected; wherein, the analog switch is connected to the third voltage analog front end, and the voltage and current end measures the voltage between the first potential monitoring point and the second potential monitoring point.

4. The data recorder according to claim 1, characterized in that The target monitoring mode is a decoupler monitoring mode; the configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: The millivolt terminal is connected to one end of the decoupler connected to the pipeline; wherein one end of the decoupler is connected to the pipeline through a shunt, and the other end of the decoupler is connected to the ground bed; the shunt is used to convert the current into a millivolt voltage drop across the shunt, which is then measured through the millivolt terminal; configuring the common reference end to be connected to the pipeline; Configuring the voltage terminal to be connected to a reference electrode; The voltage and current terminal is configured to be connected to the ground bed; wherein, when the analog switch is connected to the third voltage analog front end, the voltage and current terminal measures the voltage between the reference electrode and the ground bed.

5. The data recorder according to claim 1, characterized in that The target monitoring mode is a potentiostat monitoring mode; The configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: The millivolt terminal is connected to the cathode of the potentiostat and to the pipeline through a shunt; the shunt is used to convert the current into a millivolt voltage drop across the shunt, which is then measured through the millivolt terminal; configuring the common reference end to be connected to the pipeline; Configuring the voltage terminal to be connected to a reference electrode; The voltage and current end is configured to be connected to the energized point of the potentiostat, and the energized point of the potentiostat is connected to the pipeline; wherein the analog switch is connected to the third voltage analog front end, and the voltage and current end measures the voltage between the reference electrode and the energized point relative to the pipeline.

6. The data recorder according to claim 1, characterized in that The target monitoring mode is a synchronous on-off mode; The configuration of the monitoring connection mode of the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: Configuring the millivolt terminal to be suspended; Configuring the common reference end to be connected to a metal pipeline for transporting oil and gas to be tested; Configuring the voltage terminal to be connected to a reference electrode; Configuring the voltage and current terminals to be suspended; The voltages of the reference electrode and the metal pipeline are collected through Beidou satellite synchronous timing to monitor the potential of the metal pipeline.

7. The data recorder according to claim 1, characterized in that The target monitoring mode is a data line pattern recognition mode, and the data recorder further includes a data port; the monitoring connection mode of configuring the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: The millivolt terminal and the common reference terminal are connected to the test piece, and the voltage terminal, the voltage and current terminal, and the data port are all connected to the in-line EEPROM of the single bus built into the data line to be tested; The data port reads the contents of the in-line EEPROM via a single bus, identifies the serial number and mode corresponding to the data line based on the contents, and implements mode and harness matching based on the serial number and mode corresponding to the data line.

8. The data recorder according to claim 1, characterized in that The target monitoring mode is an automatic calibration mode, and the data recorder further includes a data port; the monitoring connection mode of configuring the millivolt terminal, the common reference terminal, the voltage terminal, and the voltage and current terminal includes: The millivolt terminal, the common reference terminal connected to the test piece, the voltage terminal, the voltage-current terminal, and the data port are all connected to the calibration source through a connecting harness; configuring the connection harness to perform single bus communication via the data port and identifying a calibration source connection; For each port in the data recorder, the calibration controller in the calibration source controls the connection status of the output voltage and current reference according to time; the calibration source controls the data recorder to enter a preset calibration mode, the calibration source outputs a reference voltage value or a reference current value, and notifies the data recorder to record the reference voltage value or the reference current value through the connecting harness and the data port, and automatically calibrates the port according to the voltage value or current value of the port and the reference voltage value or the reference current value.

9. The data recorder according to claim 1, characterized in that The multi-channel analog-to-digital converter is an 8-channel analog-to-digital converter.

Images