Stray current collection device for gas pipelines
By constructing a stray current acquisition device using multiple pipeline current sensing interface modules, signal acquisition modules, and display modules in gas pipelines, the problem of low measurement accuracy and precision of traditional devices in complex environments is solved, and efficient acquisition and display of stray current signals with a wide dynamic range is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA UNIV OF PETROLEUM (BEIJING)
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional stray current data acquisition devices struggle to adapt to the wide dynamic range of stray current signals in the face of the increasing complexity and diversity of gas pipeline transportation systems, resulting in low measurement accuracy and precision.
It employs multiple pipeline current sensing interface modules, signal acquisition modules, control modules, and display modules. The acquisition range of signal parameters is adjusted through a range switching module, and combined with a data conversion module and gain control circuit, it can achieve accurate acquisition and display of various signal parameters.
It significantly improves the accuracy and precision of stray current measurement, better adapts to the complex and diverse needs of gas pipeline transportation systems, and ensures real-time monitoring and analysis of data.
Smart Images
Figure CN224416941U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of stray current data acquisition technology, and in particular to a stray current data acquisition device for gas pipelines. Background Technology
[0002] With the rapid development of gas pipeline transportation systems, the monitoring and management of stray currents are crucial for ensuring safe system operation and extending equipment lifespan. Stray currents typically refer to currents flowing unintended within an electrical system. The long-term effects of these currents can lead to electrochemical corrosion of pipeline metal materials, seriously threatening safe pipeline operation. Therefore, accurately collecting stray current data is essential for maintaining the safety and reliability of gas pipeline transportation systems.
[0003] Traditional stray current data acquisition devices typically employ single-range current sensors and fixed-gain amplifier circuits. While these devices can meet the monitoring needs of stray currents to a certain extent, with the increasing complexity and diversity of gas pipeline transportation systems, they struggle to adapt to stray current signals with a wide dynamic range (such as weak currents or sudden strong interferences) in real time, resulting in low measurement accuracy and precision. Therefore, improving measurement accuracy and precision has become an urgent problem to be solved. Utility Model Content
[0004] This application provides a stray current acquisition device for gas pipelines to improve measurement accuracy and precision.
[0005] This application provides a stray current acquisition device for gas pipelines, which includes a pipeline current sensing interface module, a signal acquisition module, a control module, and a display module.
[0006] The input end of the pipeline current sensing interface module is used to connect to multiple stray current sensors distributed along the gas pipeline, and the output end is electrically connected to the input end of the signal acquisition module; wherein, each pipeline current sensing interface module corresponds to one stray current sensor.
[0007] The input terminal of the signal acquisition module is used to receive multiple signal parameters sent by multiple stray current sensors respectively;
[0008] The output terminal of the signal acquisition module is electrically connected to the input terminal of the control module. The signal acquisition module includes a range switching module, which is used to adjust the acquisition range of the signal parameters according to the current amplitude of each signal parameter.
[0009] The input terminal of the display module is electrically connected to the output terminal of the control module, and is used to display multiple target signal parameters after the acquisition range is switched by the range switching module.
[0010] In one possible implementation, the signal acquisition module further includes a data conversion module and a signal adjustment module;
[0011] The input terminal of the data conversion module is electrically connected to the output terminal of the pipeline current sensing interface module, and the output terminal is electrically connected to the input terminal of the range switching module.
[0012] The input of the data conversion module is used to receive multiple signal parameters sent by multiple stray current sensors. These multiple signal parameters are analog signals. The output of the module outputs digital signals corresponding to these multiple signal parameters, including energizing potential, polarization potential, AC voltage, DC current, and AC current.
[0013] The signal adjustment module includes a gain control circuit;
[0014] The input terminal of the gain control circuit is electrically connected to the output terminal of the range switching module, and the output terminal is electrically connected to the input terminal of the control module.
[0015] In one possible implementation, the range switching module includes a comparison circuit and a switching circuit;
[0016] The input terminal of the comparator circuit is electrically connected to the output terminal of the data conversion module, and the output terminal is electrically connected to the input terminal of the switching circuit.
[0017] The output of the switching circuit is electrically connected to the input of the signal conditioning module.
[0018] In one possible implementation, the data conversion module includes a channel data conversion chip;
[0019] The channel data conversion chip includes five independent input channels;
[0020] The input terminal of each independent input channel is electrically connected to the output terminal of the pipeline current sensing interface module, and the output terminal is electrically connected to the input terminal of the range switching module. Each independent input channel corresponds to one range switching module.
[0021] In one possible implementation, the control module includes a multiplexer and a display driver interface;
[0022] The input terminal of the multiplexer is electrically connected to the output terminal of the signal conditioning module, and the output terminal is electrically connected to the input terminal of the display driver interface;
[0023] The multiplexer is used to transmit multiple target signal parameters in parallel to the display driver interface;
[0024] The output of the display driver interface is electrically connected to the display module.
[0025] In one possible implementation, the device further includes a button module;
[0026] The output terminal of the button module is electrically connected to the input terminal of the control module.
[0027] In one possible implementation, the multiplexer includes a channel selection terminal;
[0028] The channel selection terminal is electrically connected to the output terminal of the button module.
[0029] In one possible implementation, the control module further includes a display control submodule;
[0030] The input terminal of the display control submodule is connected to the button module, and the output terminal is connected to the channel selection terminal of the multi-channel data selector.
[0031] In one possible implementation, the display module includes three independent display areas;
[0032] Each display area is used to display the parameters of each target signal acquired at the same time.
[0033] In one possible implementation, the display module further includes a multiple data buffer;
[0034] The input of the multiple data buffer is electrically connected to the display driver interface, and the output is electrically connected to each display area.
[0035] This application provides a stray current acquisition device for gas pipelines, which is constructed using multiple pipeline current sensing interface modules, a signal acquisition module, a control module, and a display module. The stray current data acquisition device uses independently connected pipeline current sensing interface modules, each corresponding to a sensor in the gas pipeline, ensuring that data from each sensor is independently transmitted to the signal acquisition module. The signal acquisition module can simultaneously measure multiple parameters such as current potential, polarization potential, AC voltage, DC current, and AC current, comprehensively reflecting the characteristics of stray current. The range switching module automatically optimizes the signal range before transmitting it to the control module for processing, and finally, the display module displays the data in real time, significantly improving measurement accuracy and meeting the monitoring needs of complex gas pipeline network conditions. Attached Figure Description
[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0037] Figure 1 A schematic diagram of a stray current acquisition device for gas pipelines provided in this application embodiment. Figure 1 ;
[0038] Figure 2 A schematic diagram of a stray current acquisition device for gas pipelines provided in this application embodiment. Figure 2 ;
[0039] Figure 3 This is a schematic diagram of the structure of a data conversion module provided in an embodiment of this application;
[0040] Figure 4 A schematic diagram of a stray current acquisition device for gas pipelines provided in this application embodiment. Figure 3 .
[0041] Figure label:
[0042] 1: Pipeline current sensing interface module; 2: Signal acquisition module; 21: Range switching module; 211: Comparison circuit; 212: Switching circuit; 22: Data conversion module; 23: Signal adjustment module; 231: Gain control circuit; 3: Control module; 31: Multiplexer; 32: Display driver interface; 33: Display control submodule; 4: Display module; 41: Multiple data buffer; 5: Button module; 6: Storage module; 7: Positioning module.
[0043] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation
[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0045] Gas pipeline transportation systems are vast and complex networks involving numerous pipes, valves, pumping stations, and other equipment components. With the rapid development of gas pipeline transportation systems in modern energy supply systems, their coverage is constantly expanding, and their structure is becoming increasingly complex. Against this backdrop, the monitoring and management of stray currents plays a crucial role in ensuring the safe operation of the entire system and extending the service life of equipment.
[0046] Stray currents typically flow along unintended paths in electrical systems, and their sources are quite widespread. For example, nearby high-voltage power lines, electrified railways, or other large electrical equipment can all be sources of stray currents. Once these stray currents intrude into a gas pipeline transportation system, they can cause electrochemical corrosion of the pipeline's metal materials over time. This corrosion process is gradual and insidious, seriously threatening the safe operation of the pipeline. If a pipeline leaks due to corrosion, the leaked gas into the surrounding environment could potentially trigger serious safety accidents such as explosions and fires.
[0047] Therefore, accurately collecting stray current data is crucial for maintaining the safety and reliability of gas pipeline transportation systems. Analysis of this data allows for the timely detection of stray current anomalies, enabling effective preventative measures to be taken. Traditional stray current data acquisition devices mostly employ single-range current sensors and fixed-gain amplifier circuits. In the early stages of gas pipeline transportation system development, such devices did indeed meet the stray current monitoring needs to a certain extent.
[0048] However, as gas pipeline transportation systems become increasingly complex and diverse, the number of surrounding electrical interference sources is constantly increasing, causing stray current signals to exhibit a wide dynamic range. For traditional single-range current sensors, when encountering weak current signals, their range may be too large, making it difficult to accurately capture subtle changes in these signals, leading to inaccurate measurement accuracy. Furthermore, when faced with sudden, strong currents generated by intense interference, fixed-gain amplifier circuits, due to their inflexible gain adjustment, cannot effectively amplify and process the strong current signals, resulting in data that cannot accurately reflect the actual stray current situation. This directly leads to a decrease in measurement accuracy, causing significant discrepancies between the analysis results regarding pipeline corrosion risks based on the collected data and the actual situation. Therefore, improving measurement accuracy and precision has become an urgent problem to be solved.
[0049] To address the aforementioned issues, this application provides a stray current acquisition device for gas pipelines. This device is constructed using components such as a pipeline current sensing interface module, a signal acquisition module, a control module, and a display module. The pipeline current sensing interface module is connected one-to-one with stray current sensors, enabling independent and accurate transmission of data from each sensor to the signal acquisition module. The signal acquisition module receives various signal parameters, including energization potential, polarization potential, AC voltage, DC current, and AC current, comprehensively reflecting the characteristics of the stray current. The range switching module transmits the signal after adjusting the acquisition range to the control module, and finally displays it in the display module. This improves the accuracy and precision of stray current measurement, better adapting to the complex and diverse needs of gas pipeline transportation systems.
[0050] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0051] Figure 1 A schematic diagram of a stray current acquisition device for gas pipelines provided in this application embodiment. Figure 1 . Figure 2 A schematic diagram of a stray current acquisition device for gas pipelines provided in this application embodiment. Figure 2 . Figure 3 This is a schematic diagram of the structure of a data conversion module provided in an embodiment of this application. Figure 4 A schematic diagram of a stray current acquisition device for gas pipelines provided in this application embodiment. Figure 3 .like Figure 1-3 As shown, this embodiment provides a stray current acquisition device for gas pipelines. The device includes multiple pipeline current sensing interface modules 1, signal acquisition modules 2, control modules 3, and display modules 4.
[0052] The system comprises several pipeline current sensing interface modules 1, each with an input terminal for connecting to multiple stray current sensors distributed along the gas pipeline and an output terminal electrically connected to the input terminal of the signal acquisition module 2. Each pipeline current sensing interface module 1 corresponds to one stray current sensor. The input terminal of the signal acquisition module 2 receives multiple signal parameters sent by the multiple stray current sensors. The output terminal of the signal acquisition module 2 is electrically connected to the input terminal of the control module 3. The signal acquisition module 2 includes a range switching module 21, which adjusts the acquisition range of the signal parameters according to the amplitude of each signal parameter. The input terminal of the display module 4 is electrically connected to the output terminal of the control module 3 and displays multiple target signal parameters after the acquisition range has been switched by the range switching module 21.
[0053] In this embodiment, multiple stray current sensors are distributed along the gas pipeline. These sensors can detect multiple signal parameters related to stray currents. These signal parameters include energizing potential, polarization potential, AC voltage, DC current, and AC current. The input terminals of multiple pipeline current sensing interface modules 1 are respectively connected to these stray current sensors, establishing a connection channel with the sensors to acquire the signal parameters detected by them. The output terminal of the pipeline current sensing interface module 1 is electrically connected to the input terminal of the signal acquisition module 2, accurately transmitting the signal parameters received from the multiple stray current sensors to the signal acquisition module 2. The pipeline current sensing interface module 1 can perform signal adaptation, filtering, or isolation functions. The input terminal of the signal acquisition module 2 receives multiple signal parameters sent by the multiple stray current sensors. This means that the signal acquisition module 2 can simultaneously process multiple types of signals, comprehensively reflecting the characteristics of stray currents.
[0054] In one possible implementation, each pipe current sensing interface module 1 corresponds to a stray current sensor and includes at least: an energized potential interface module, a polarization potential interface module, an AC voltage interface module, a DC current interface module, and an AC current interface module.
[0055] Optional, such as Figure 2As shown, the input terminal of the data conversion module 22 is electrically connected to the output terminal of the pipeline current sensing interface module 1, and the output terminal is electrically connected to the input terminal of the range switching module 21. The input terminal of the data conversion module 22 is used to receive multiple signal parameters sent by multiple stray current sensors, which are analog signals. The output terminal outputs digital signals corresponding to the multiple signal parameters, including energizing potential, polarization potential, AC voltage, DC current, and AC current. The signal adjustment module 23 includes a gain control circuit 231. The input terminal of the gain control circuit 231 is electrically connected to the output terminal of the range switching module 21, and the output terminal is electrically connected to the input terminal of the control module 3.
[0056] In one possible implementation, the input terminals of the data conversion module 22 are electrically connected to the output terminals of multiple pipeline current sensing interface modules 1. The pipeline current sensing interface modules 1 transmit the raw signal parameters corresponding to the energizing potential, polarization potential, AC voltage, DC current, and AC current obtained from the stray current sensor to the data conversion module 22. These raw signal parameters are analog signals, and the data conversion module 22 converts them into corresponding digital signals. During the conversion process, the data conversion module 22 can, for example, use an analog-to-digital converter to convert the analog signal to a digital signal, converting the continuous analog signal into a discrete digital signal according to a certain sampling frequency and quantization accuracy. The converted digital signal is transmitted from the output terminal of the data conversion module 22 to the input terminal of the range switching module 21.
[0057] Optional, such as Figure 3 As shown, the data conversion module 22 includes a channel data conversion chip 221; the channel data conversion chip 221 includes five independent input channels; the input terminal of each independent input channel is electrically connected to the output terminal of the pipeline current sensing interface module 1, and the output terminal is electrically connected to the input terminal of the range switching module 21, and each independent input channel corresponds to one range switching module 21.
[0058] In one possible implementation, the channel data conversion chip 221 in the data conversion module 22 indicates that the data conversion module 22 has five independent input channels. This multi-channel design can simultaneously process analog signals corresponding to energizing potential, polarization potential, AC voltage, DC current, and AC current. For example, in a complex sensor system, there are five sensors of different types or locations. The analog signal output by each sensor can be connected to one of the five independent input channels through the pipe current sensing interface module 1. The channel data conversion chip 221 is used to convert the input analog signal into a digital signal. The output of each independent input channel is electrically connected to the input of the range switching module 21, and each independent input channel corresponds to one range switching module 21. This means that for each digital signal input from the pipe current sensing interface module 1 and converted by the data conversion chip, there is a dedicated range switching module 21 to process it. This one-to-one correspondence helps to perform independent range adjustment for each signal channel, thereby improving the adaptability of the entire device to signals of different amplitudes. For example, if an input channel receives a weak analog signal, after data conversion, the corresponding range switching module 21 switches it to a suitable range for the weak signal based on the amplitude of the signal parameter for subsequent processing, thereby improving the accuracy and precision of the measurement. Conversely, if another channel receives a digital signal converted from a strong analog signal, its corresponding range switching module 21 can switch to a larger range. As mentioned earlier, since different signals have different amplitude ranges, each range switching module 21 can switch the corresponding signal parameters to a suitable range to improve the accuracy and effectiveness of the measurement.
[0059] Optional, such as Figure 2 As shown, the range switching module 21 includes a comparison circuit 211 and a switching circuit 212; the input terminal of the comparison circuit 211 is electrically connected to the output terminal of the data conversion module 22, and the output terminal is electrically connected to the input terminal of the switching circuit 212; the output terminal of the switching circuit 212 is electrically connected to the input terminal of the signal adjustment module 23.
[0060] In one possible implementation, since each independent input channel corresponds to a range switching module 21, each range switching module 21 includes a comparator circuit 211 and a switching circuit 212. Each comparator circuit 211 and its corresponding switching circuit 212 process the corresponding signal parameters. Taking the comparator circuit 211 and switching circuit 212 in a range switching module 21 as an example, this range switching module 21 is used to switch the range of AC current. The input terminal of the comparator circuit 211 is electrically connected to the output terminal of the data conversion module 22, and is used to receive the AC current converted by the data conversion module 22 into a digital signal.
[0061] For example, the comparator circuit 211 may have multiple preset amplitude thresholds. These thresholds divide the amplitude range of the input signal to determine the magnitude range of the alternating current. The comparator circuit 211 determines the magnitude of the alternating current by comparing the amplitude of the input alternating current with the corresponding preset amplitude thresholds.
[0062] For example, based on the comparison result with a preset amplitude threshold, the comparator circuit 211 outputs a corresponding control signal to the switching circuit 212. This control signal includes information about the amplitude range of the input AC current and serves as the basis for the switching circuit 212 to perform range switching operations. For instance, if the amplitude of the input AC current is less than a first preset amplitude threshold, the comparator circuit 211 outputs a signal indicating a low amplitude range; if the amplitude is between the first and second preset amplitude thresholds, it outputs a signal indicating a corresponding intermediate amplitude range, etc., where the second preset amplitude threshold is greater than the first preset amplitude threshold.
[0063] For example, the input of the switching circuit 212 receives a control signal from the comparator circuit 211. Based on this control signal, the switching circuit 212 performs a range switching operation. The switching circuit 212 may include multiple acquisition channels or circuit modules with different ranges. For instance, if the comparator circuit 211 determines that the digital signal corresponding to the AC current is in a low amplitude range, the switching circuit 212 will switch the signal to a channel suitable for acquiring low-amplitude signals. This channel has higher sensitivity and a smaller range, allowing for more accurate acquisition of low-amplitude signals. If the signal is in a high amplitude range, the switching circuit 212 will switch to an acquisition channel with a larger range that can withstand high-amplitude signals, preventing the signal from exceeding the acquisition range. The signal after range switching is output from the output of the switching circuit 212 and transmitted to the input of the signal adjustment module 23.
[0064] In one possible implementation, the signal adjustment module 23 includes a gain control circuit 231. The input of the gain control circuit 231 is electrically connected to the output of the switching circuit 212 in the range switching module 21, and its output is electrically connected to the input of the control module 3. The gain control circuit 231 is used to amplify or attenuate the signal parameters after range switching. For example, if the signal is still weak after range switching, the gain control circuit 231 can amplify the signal by setting a gain coefficient so that it can be more clearly identified and analyzed in subsequent processing. Conversely, if the signal is too strong, even after range switching, the signal can be attenuated by setting a gain coefficient less than 1 to avoid signal saturation and other problems in the subsequent control module 3. The signal adjusted by the gain control circuit 231 is transmitted from its output to the input of the control module 3 for further processing, such as storage or transmission to the display module 4.
[0065] Optional, such as Figure 2 As shown, the control module 3 includes a multiplexer 31 and a display driver interface 32; the input terminal of the multiplexer 31 is electrically connected to the output terminal of the signal adjustment module 23, and the output terminal is electrically connected to the input terminal of the display driver interface 32; the multiplexer 31 is used to transmit multiple target signal parameters in parallel to the display driver interface 32; the output terminal of the display driver interface 32 is electrically connected to the display module 4.
[0066] In this embodiment, the multiplexer 31 refers to the parallel transmission of multiple target signal parameters (such as energizing potential, polarization potential, AC voltage, DC current and AC current) output by the signal adjustment module 23 to the display driver interface 32 during the multiplex data transmission process, thereby avoiding the delay caused by traditional serial switching.
[0067] The display driver interface 32 connects the control module 3 and the display module 4. The input of the display module 4 receives target signal parameters from the multiplexer 31. After internal processing and conversion, the output transmits a suitable signal to the display module 4. The display module 4 refers to the part of the device that visually presents the data. The display driver interface 32 is electrically connected to the display module 4, enabling multiple target signal parameters to be correctly displayed on the display module 4. For example, if the display module 4 is a liquid crystal display (LCD), the display driver interface 32 converts the processed signal into a format suitable for LCD display, such as appropriate voltage or current signals or specific digital codes, thereby accurately displaying the values or related information of the current potential, polarization potential, AC voltage, DC current, and AC current on the LCD.
[0068] Optional, such as Figure 2 As shown, the device also includes a button module 5; the output terminal of the button module 5 is electrically connected to the input terminal of the control module 3.
[0069] In this embodiment, the output terminal of the button module 5 is electrically connected to the input terminal of the control module 3. This connection enables the button module 5 to send commands or signals to the control module 3. The button module 5 plays an important role in human-computer interaction. The button module 5 can be a physical button on the device or a virtual button (on a touch screen or other device). For example, in a stray current acquisition device for gas pipelines, the button module 5 may include multiple buttons, such as a parameter switching button. The parameter switching button allows the user to switch between different target signal parameters. In a stray current acquisition device for gas pipelines, the target signal parameters include current potential, polarization potential, AC voltage, DC current, and AC current. By pressing the parameter switching button, the user can have the display module 4 cycle through different parameters. This function allows the user to quickly view various parameters without having to search through complex menus or settings. The parameter switching button can switch parameters in a certain order according to the device's design logic, such as according to the importance of the parameters or the acquisition order, thereby improving the efficiency of the user in obtaining information.
[0070] Optional, such as Figure 2 As shown, the multiplexer 31 includes a channel selection terminal; the channel selection terminal is electrically connected to the output terminal of the button module 5.
[0071] In one possible implementation, when the channel selection terminal of the multiplexer 31 is electrically connected to the output terminal of the button module 5, a convenient interactive method is provided for the user to control the channel selection of the multiplexer 31. The user can send signals to the channel selection terminal of the multiplexer 31 by operating the button module 5. The multiplexer 31 is used to switch between multiple target signal parameters to select specific data for display. The user can press a button according to actual needs, and the button module 5 will output a corresponding signal to the channel selection terminal, thus realizing the user's control over data selection.
[0072] Optional, such as Figure 2 As shown, the control module 3 also includes a display control submodule 33; the input terminal of the display control submodule 33 is connected to the button module 5, and the output terminal is connected to the channel selection terminal of the multiplexer 31.
[0073] In one possible implementation, the input terminal of the display control submodule 33 is connected to the button module 5 to receive user input signals from the button module 5. When the user operates the button module 5, the display control submodule 33 acquires the corresponding input signal, and its output terminal is connected to the channel selection terminal of the multiplexer 31 to send the processed signal to the channel selection terminal of the multiplexer 31.
[0074] For example, users can select different data to display by pressing buttons. The display control submodule 33 determines the data channel the user wants to select based on the button input, and then sends the corresponding signal to the channel selection terminal of the multiplexer 31. In this way, users can easily switch between different data channels and see the corresponding data on the device's display interface, enhancing the ease of use of the device and the user experience.
[0075] Optional, such as Figure 2 As shown, display module 4 includes three independent display areas; each display area is used to display the target signal parameters acquired at the same time.
[0076] In this embodiment, the display module 4 includes three independent display areas. Each display area is used to display the target signal parameters collected at the same time. In a stray current acquisition device for a gas pipeline, the target signal parameters include energized potential, polarization potential, AC voltage, DC current, and AC current. When the device simultaneously acquires these five parameters at a certain moment, the three independent display areas can respectively display any three of the energized potential, polarization potential, AC voltage, DC current, and AC current. This allows users to intuitively obtain information on multiple related parameters at the same time, without needing to view different parameters on different display interfaces or through complex switching operations, thus improving the efficiency of information acquisition.
[0077] In one possible implementation, setting up three independent display areas helps improve the readability and usability of the system. Different types of target signal parameters can be displayed in different display areas according to a certain logic or order of importance. For example, based on user habits or the importance of the parameters, the most important parameters can be displayed in the first display area after display module 4 is turned on, and secondary parameters can be displayed in other display areas in sequence. This layout allows users to quickly locate and understand the various parameter information collected by the system, which helps to quickly assess the overall operating status of the system or the status of the monitored object.
[0078] Optional, such as Figure 2 As shown, the display module 4 also includes a multi-data buffer 41; the input end of the multi-data buffer 41 is electrically connected to the display driver interface 32, and the output end is electrically connected to each of the display areas.
[0079] In this embodiment, the multiple data buffer 41 is used in the display module 4 to buffer and temporarily store data. The input terminal of the multiple data buffer 41 is electrically connected to the display driver interface 32, which enables it to receive five target signal parameters from the display driver interface 32.
[0080] Optional, such as Figure 4As shown, the stray current acquisition device for gas pipelines includes a first interface, a second interface, a third interface, a display module 4, a control module 3, a button module 5, a storage module 6, and a GPS positioning module 7. The first interface connects to the gas pipeline to monitor stray currents on the pipeline; the second interface connects to a test piece to simulate a corrosion monitoring unit for the pipeline's metal structure; and the third interface connects to a reference electrode to provide a potential reference. The first interface receives AC current, DC current, AC voltage, and DC voltage (polarization potential). These AC current, DC current, AC voltage, and DC voltage are amplified and transmitted to the signal acquisition module 2. The output of the signal acquisition module 2 is connected to the input of the control module 3. The control module 3 can be, for example, a microcontroller unit (MCU). The control module 3 is connected to the button module 5, display module 4, storage module 6, and positioning module 7. The positioning module 7 accurately determines the geographical location of the device. For stray current monitoring, since multiple stray current sensors are distributed along the gas pipeline, when an abnormal stray current signal is detected in a certain area, the location module 7 determines the corresponding sensor location, which can quickly pinpoint the specific location on the gas pipeline, facilitating subsequent maintenance and troubleshooting. The storage module 6 stores relevant data on stray currents. For example, data such as AC current, DC current, AC voltage, and DC voltage (polarization potential) acquired by the signal acquisition module 2 can be stored in the storage module 6. This data is a quantitative record of the stray current state of the gas pipeline. The storage module 6 can also store data related to corrosion monitoring of the simulated pipeline metal structure. When the second interface connects to the test piece for corrosion monitoring, the monitored corrosion-related data, such as intermediate calculation data of the corrosion rate and corrosion state data at different time points, can be stored in the storage module 6. Since the third interface connects to the reference electrode to provide a potential reference, data related to the potential reference can also be stored, such as the stable potential value provided by the reference electrode under different environmental conditions and the calibration data related to that potential value.
[0081] It should be noted that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, system, product, or maintenance tool that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or maintenance tools.
[0082] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.
[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A stray current acquisition device for gas pipelines, characterized in that, The device includes multiple pipeline current sensing interface modules, a signal acquisition module, a control module, and a display module; The input terminals of the multiple pipeline current sensing interface modules are used to connect to multiple stray current sensors distributed along the gas pipeline, and the output terminals are electrically connected to the input terminal of the signal acquisition module; wherein, each pipeline current sensing interface module corresponds to one stray current sensor. The input terminal of the signal acquisition module is used to receive multiple signal parameters sent by the multiple stray current sensors respectively; The output terminal of the signal acquisition module is electrically connected to the input terminal of the control module. The signal acquisition module includes a range switching module, which is used to adjust the acquisition range of the signal parameters according to the amplitude of each signal parameter at present. The input terminal of the display module is electrically connected to the output terminal of the control module, and is used to display multiple target signal parameters after the acquisition range is switched by the range switching module.
2. The apparatus according to claim 1, characterized in that, The signal acquisition module also includes a data conversion module and a signal adjustment module; The input terminal of the data conversion module is electrically connected to the output terminal of the pipeline current sensing interface module, and the output terminal is electrically connected to the input terminal of the range switching module. The input terminal of the data conversion module is used to receive multiple signal parameters sent by the multiple stray current sensors respectively. The multiple signal parameters are analog signals. The output terminal outputs digital signals corresponding to the multiple signal parameters. The multiple signal parameters include energizing potential, polarization potential, AC voltage, DC current and AC current. The signal adjustment module includes a gain control circuit; The input terminal of the gain control circuit is electrically connected to the output terminal of the range switching module, and the output terminal is electrically connected to the input terminal of the control module.
3. The apparatus according to claim 2, characterized in that, The range switching module includes a comparison circuit and a switching circuit; The input terminal of the comparison circuit is electrically connected to the output terminal of the data conversion module, and the output terminal is electrically connected to the input terminal of the switching circuit. The output terminal of the switching circuit is electrically connected to the input terminal of the signal adjustment module.
4. The apparatus according to claim 2, characterized in that, The data conversion module includes a channel data conversion chip; The channel data conversion chip includes five independent input channels; The input terminal of each independent input channel is electrically connected to the output terminal of the pipeline current sensing interface module, and the output terminal is electrically connected to the input terminal of the range switching module. Each independent input channel corresponds to one range switching module.
5. The apparatus according to claim 4, characterized in that, The control module includes a multiplexer and a display driver interface; The input terminal of the multiplexer is electrically connected to the output terminal of the signal adjustment module, and the output terminal is electrically connected to the input terminal of the display driver interface. The multiplexer is used to transmit multiple target signal parameters in parallel to the display driver interface; The output of the display driver interface is electrically connected to the display module.
6. The apparatus according to claim 5, characterized in that, The device also includes a button module; The output terminal of the button module is electrically connected to the input terminal of the control module.
7. The apparatus according to claim 6, characterized in that, The multiplexer includes a channel selection terminal; The channel selection terminal is electrically connected to the output terminal of the button module.
8. The apparatus according to claim 7, characterized in that, The control module also includes a display control submodule; The input terminal of the display control submodule is connected to the button module, and the output terminal is connected to the channel selection terminal of the multi-channel data selector.
9. The apparatus according to claim 5, characterized in that, The display module includes three independent display areas; Each display area is used to display the parameters of each target signal acquired at the same time.
10. The apparatus according to claim 9, characterized in that, The display module also includes multiple data caches; The input terminal of the multiple data buffer is electrically connected to the display driver interface, and the output terminal is electrically connected to each of the display areas.