Pipeline warning system

Abstract

The present application relates to a pipeline warning system, which includes an AC power supply circuit for providing alternating current; a film capacitor connected to the AC power supply circuit; a signal processing module and a control terminal. The signal processing module is used to obtain the electrical signal data in the film capacitor and generate a warning signal according to the change of the electrical signal data. The signal processing module is also used to transmit the warning signal to the control terminal. The control terminal is used to give an alarm after obtaining the warning signal. A plurality of film capacitors are provided, and the plurality of film capacitors are sequentially connected to the pipeline along the outer periphery of the pipeline. The integrity of the film capacitor is detected through the electrical signal data, which is stable and accurate. The present application has the effects of low false alarm rate and high warning accuracy.

Description

Technical Field

[0001] This application relates to the field of early warning, and particularly to a pipeline early warning system. Background Art

[0002] Pipelines are currently the most commonly used conveying equipment for transporting resources over long distances. The West-East Gas Pipeline Project for transporting natural gas is the most representative. Secondly, the transportation of refined oil, petroleum, water and other resources also mainly relies on laying pipelines. For pipelines spanning dozens of kilometers or even hundreds of kilometers, it is not easy to achieve manual supervision. In order to protect pipelines and the resources inside them, pipeline early warning systems have emerged.

[0003] In the related art, most early warning systems monitor pipelines through detection instruments such as pressure sensors, temperature sensors, and fiber optic vibration sensors. When the monitored indices are abnormal, the detection instruments transmit signals to the controller connected to them. The controller analyzes the variation law of the obtained indices to judge whether there is a problem with the pipeline, and then controls whether the alarm sounds. Relevant responsible personnel check and protect the pipeline based on the alarm status of the alarm.

[0004] Regarding the above related art, the inventor believes that pressure sensors, temperature sensors, and fiber optic vibration sensors all monitor pipelines through indirect signals, rather than directly monitoring whether the pipeline itself is damaged. Moreover, pipelines are usually buried underground or erected outdoors, and the environmental conditions are relatively complex. The probability of the external environment triggering the detection instrument to transmit an alarm signal is relatively high, resulting in an increased false alarm rate and reducing the early warning accuracy of the early warning system. Summary of the Invention

[0005] In order to reduce the false alarm rate and further improve the early warning accuracy, this application provides a pipeline early warning system.

[0006] The pipeline early warning system provided by this application adopts the following technical solutions:

[0007] A pipeline early warning system includes an AC power supply circuit for providing alternating current;

[0008] A DC power supply circuit for providing direct current;

[0009] A thin film capacitor connected to the AC power supply circuit;

[0010] A signal processing module and a control terminal; the signal processing module is connected to the DC power supply circuit, and is used to obtain the electrical signal data in the thin film capacitor, and generate an early warning signal according to the change of the electrical signal data; the signal processing module is also used to transmit the early warning signal to the control terminal;

[0011] The control terminal is used to give an alarm after obtaining the early warning signal.

[0012] By adopting the above technical solution, the thin-film capacitor is coated on the outer wall of the pipeline. When the pipeline encounters destructive damage, such as drilling, fracture or local damage, the thin-film capacitor is damaged, and the electrical signal data in the AC circuit where the thin-film capacitor is located will mutate. The signal processing module generates a warning signal based on the mutation of the electrical signal data and sends it to the control terminal, and the control terminal gives an alarm to remind the staff. Compared with the detection methods such as pressure sensors or light vibration sensors in the related art, on the one hand, it can be fully coated on the outer peripheral side of the pipeline to achieve comprehensive protection; on the other hand, it will trigger an alarm only when the pipeline itself encounters abnormalities, which helps to reduce the false alarm rate and improve the warning accuracy.

[0013] Optionally, the thin-film capacitor includes two conductive layers that are stacked and used to form the two electrodes of the capacitor, and an insulating layer is provided between the two conductive layers.

[0014] By adopting the above technical solution, the conductive layer and the insulating layer form a capacitor structure. Compared with detection instruments such as sensors, it realizes the warning detection of the pipeline through the change of electrical signal data, and has higher stability. The conductive layer is not easily damaged in the natural environment, which helps to reduce the false alarm rate and improve the warning accuracy.

[0015] Optionally, a protective layer for covering the conductive layer is provided on the side of the conductive layer away from the insulating layer.

[0016] By adopting the above technical solution, the protective layer covers the conductive layer and the insulating layer, making it difficult for objects in the external environment to come into contact with the conductive layer and the insulating layer, so that the conductive layer or the insulating layer is not easily damaged. It helps to improve the stability of the thin-film capacitor, reduce the false alarm rate, and improve the warning accuracy.

[0017] Optionally, the conductive layer is formed by laying conductive bands, the width of the conductive band is set between 0.5 cm and 5 cm, and the thickness of the conductive layer is set between 0.1 μm and 1 cm.

[0018] By adopting the above technical solution, the centimeter-level bandwidth helps to improve the damage accuracy of the conductive band. That is, when the conductive band has a break less than the bandwidth width, the electrical signal data obtained by the signal processing module is not enough to exceed the signal threshold, so it is not easy to trigger a warning. The warning accuracy is selective, reducing the false alarm rate. The thickness of the conductive layer is set between 0.1 μm and 1 cm, which helps to improve the flexibility of the conductive layer, facilitates the thin-film capacitor to be fully coated on the outer peripheral side of the pipeline, provides warning protection for the pipeline, and improves the warning accuracy.

[0019] Optionally, a plurality of the thin-film capacitors are provided, and the plurality of thin-film capacitors are sequentially laid along the outer periphery of the pipeline; adjacent thin-film capacitors are in contact with each other, and the thin-film capacitors are fixedly connected to the pipeline.

[0020] By adopting the above technical solution, when the length of the pipeline is relatively long, multiple thin-film capacitors are used to wrap the pipeline. Adjacent thin-film capacitors are in contact with each other. It makes it difficult for others to damage the pipeline through the gaps between adjacent thin-film capacitors, causing detection loopholes, which helps to improve the early warning accuracy and provide better early warning protection for the pipeline.

[0021] Optionally, a plurality of the thin-film capacitors are provided, and the plurality of thin-film capacitors are sequentially laid along the outer periphery of the pipeline; an overlapping section is formed between adjacent thin-film capacitors.

[0022] By adopting the above technical solution, when others damage the pipeline, if the damage position is located in the overlapping section of adjacent thin-film capacitors. Then the control terminal will receive two early warning signals simultaneously. At this time, it is convenient for the relevant responsible personnel to know that the damage position is in the overlapping section, which helps to improve the positioning accuracy.

[0023] Optionally, one signal processing module is provided, and each thin-film capacitor is connected to the signal processing module.

[0024] By adopting the above technical solution, connecting multiple thin-film capacitors to one signal processing module helps to reduce costs and construction difficulties. Thereby ensuring the installation accuracy, reducing the false alarm rate, and improving the early warning accuracy.

[0025] Optionally, a difference module is provided in the signal processing module; the difference module is used to differentially number the electrical signal data in the plurality of thin-film capacitors; the difference module is further used to number the early warning signal according to the number of the electrical signal data corresponding to the early warning signal when the signal processing module generates an early warning signal.

[0026] By adopting the above technical solution, the cost and construction difficulty are further reduced, the installation accuracy is ensured, the false alarm rate is reduced, and the early warning accuracy is improved.

[0027] Optionally, a plurality of signal processing modules are provided, and the plurality of signal processing modules are in one-to-one communication connection with the thin-film capacitors.

[0028] By adopting the above technical solution, each thin-film capacitor is correspondingly provided with a signal processing module, which helps to improve the stability of the acquisition and transmission of electrical signal data. Thereby reducing the false alarm rate and improving the early warning accuracy.

[0029] Optionally, the thin-film capacitor is connected to a positioning module, and the positioning module is used to generate position data and transmit the position data to the control terminal.

[0030] By adopting the above technical solution, the positioning module facilitates the relevant responsible personnel to know the location of the damaged thin-film capacitor. Thereby arriving at the scene in time to protect the pipeline. Description of the Drawings

[0031] Figure 1 It is a circuit connection diagram of the pipeline warning system in Embodiment 1 of the present application;

[0032] Figure 2 It is a schematic diagram of the connection structure between the pipeline and the thin-film capacitor in Embodiment 1 of the present application;

[0033] Figure 3 It is a cross-sectional view of the thin-film capacitor in Embodiment 1 of the present application;

[0034] Figure 4 It is a schematic diagram of the overall structure of the thin-film capacitor in Embodiment 1 of the present application;

[0035] Figure 5 It is a framework diagram of the signal processing module in Embodiment 1 of the present application;

[0036] Figure 6 It is a side view of the connection between the pipeline and the thin-film capacitor in Embodiment 2 of the present application;

[0037] Figure 7 It is a circuit connection diagram of the pipeline warning system in Embodiment 3 of the present application;

[0038] Figure 8 It is a schematic diagram of the relevant structure of the signal processing module.

[0039] Explanation of reference numerals: 1. AC power supply circuit; 2. Thin-film capacitor; 21. Conductive layer; 22. Insulating layer; 23. Protective layer; 24. Connection terminal; 3. Signal processing module; 31. Difference module; 4. Control terminal; 5. Positioning module; 6. Pipeline; 7. DC power supply circuit. Detailed implementation manners

[0040] The embodiment of the present application discloses a pipeline warning system.

[0041] Embodiment 1

[0042] Referring to Figure 1 , the pipeline warning system includes an AC power supply circuit 1, a DC power supply circuit 7, a thin-film capacitor 2, a signal processing module 3, and a control terminal 4. The AC power supply circuit 1 provides alternating current for the thin-film capacitor 2 to generate electrical signal data in the thin-film capacitor 2. The DC power supply circuit 7 is used to provide direct current, and the signal processing module 3 is connected to the DC power supply circuit 7. The signal processing module 3 acquires the electrical signal data in the thin-film capacitor 2, generates a warning signal according to the change of the electrical signal data, and then transmits the warning signal to the control terminal 4. The control terminal 4 is used to alarm when receiving the warning signal. It is convenient for the relevant responsible personnel to know the warning information in time.

[0043] Referring to Figure 2, one or more thin-film capacitors 2 can be provided. The thin-film capacitor 2 is connected to the pipeline 6 along the outer periphery of the pipeline. Specifically, when multiple thin-film capacitors 2 are provided, the multiple thin-film capacitors 2 are sequentially coated on the pipeline along the outer periphery of the pipeline. Adjacent thin-film capacitors 2 are in contact with each other. The thin-film capacitor 2 is fixedly connected to the pipeline 6, and the fixed connection method is determined by the specific construction, such as bonding or welding.

[0044] Refer to Figure 1 and Figure 3 , the thin-film capacitor 2 includes two conductive layers 21 that are stacked and used to form the two electrodes of the capacitor. An insulating layer 22 is provided between the two conductive layers 21. The insulating layer 22 and the two conductive layers 21 form the capacitor structure. Each conductive layer 21 is connected with a connection terminal 24, and the connection terminal 24 is used to connect the AC power supply circuit 1 and the conductive layer 21 connected thereto. An AC circuit is formed among the AC power supply circuit 1, the connection terminal 24, and the conductive layer 21, so that an electrical signal data is formed in the conductive layer 21. The insulating layer 22 can be made of rubber material or plastic material.

[0045] Refer to Figure 4 , the thickness of the conductive layer 21 is set between 0.1 micrometers and 1 centimeter, and the conductive layer 21 is at least formed by laying one conductive strip. Specifically, the conductive strip is set as a material strip with conductive performance, such as an aluminum strip, a copper strip, graphite, or conductive carbon black. The conductive strip is reciprocally laid from one side of the insulating layer 22 to the other side in a zigzag form, and a number of gaps are formed during this process. The gaps enable alternating current to flow through any part of the conductive layer 21. Again, when direct current is applied to the conductive strip, the number of gaps enables the direct current in the conductive strip to flow along the laying direction of the conductive strip. The width of the conductive strip is set between 0.5 centimeters and 5 centimeters, which helps the relevant responsible personnel to set the threshold, thereby reducing the false alarm rate.

[0046] Refer to Figure 3, a protective layer 23 is provided on the side of the conductive layer 21 away from the insulating layer 22. The protective layer 23 is made of an insulating material, such as a rubber film or a plastic film. The interfacial bonding between the conductive layer 21 and the insulating layer 22 and between the conductive layer 21 and the protective layer 23 can be specifically determined according to the manufacturing process of the thin-film capacitor, such as electroplating, etching, or bonding through a polymer adhesive. The protective layer 23 is used to cover the conductive layer 21 and the insulating layer 22, making it difficult for external objects to directly contact the conductive layer 21 or the insulating layer 22, so that the conductive layer 21 and the insulating layer 22 are not easily scratched. This helps to improve the stability of the electrical signal data, thereby helping to reduce the false alarm rate and improve the warning accuracy. In addition, the protective layer 23 can also be set as an anti-corrosion film, making the conductive layer 21 and the insulating layer 22 not easily corroded. Power supply lines, signal transmission lines and other lines are all arranged between the protective layer 23 close to the outer peripheral surface of the pipeline and the conductive layer 21 to achieve line protection, making it difficult for others to damage the power supply lines and other lines of the pipeline warning system.

[0047] Refer to Figure 1 , a plurality of signal processing modules 3 are provided. The plurality of signal processing modules 3 are communicatively connected to the thin-film capacitors 2 in a one-to-one correspondence. That is, one signal processing module 3 is provided in each thin-film capacitor 2. The input end of the signal processing module 3 is connected to the connection terminal 24 in the corresponding thin-film capacitor 2, so as to obtain the electrical signal data in the conductive layer 21. The electrical signal data can be a voltage signal, a current signal or a resistance signal.

[0048] Refer to Figure 1 and Figure 5 , taking the voltage signal as an example, the average voltage value under normal conditions is used as the reference signal. The voltage signal in the thin-film capacitor 2 is collected and its average value is calculated, and the voltage average value is compared with the voltage reference signal. When the thin-film capacitor 2 is damaged, such as punctured, torn and corroded, the conductive band is broken, and the difference between the two is greater than the signal threshold, a high-level signal is output. After receiving the high-level signal, the control terminal alarms, or drives the alarm connected to it to alarm.

[0049] For another example, by collecting the current signal in the thin-film capacitor 2, when the thin-film capacitor 2 is damaged, the resistance value of the thin-film capacitor 2 increases, the current value in the AC circuit decreases, and even the thin-film capacitor 2 makes the AC circuit in an open circuit state and the current value is zero. At this time, the obtained current signal exceeds the threshold range, and the signal processing module 3 outputs a high-level signal, prompting the control terminal to alarm. The signal processing module 3 can be an MCU or a single-chip microcomputer. The signal processing module 3 can compare the electrical signal data with the threshold through a comparison circuit or a program capable of realizing the comparison function, and output a low-level signal or a high-level signal. The low-level signal is regarded as normal, and the high-level signal is the alarm signal.

[0050] Refer to Figure 1, a rectifying circuit and a switching unit are provided in the signal processing module 3. The input end of the rectifying circuit is connected to the AC power supply circuit 1, and the switching unit is connected between the output end of the rectifying circuit and the power supply end of the signal processing module 3. The switching unit is connected to the DC power supply circuit 7. When the AC circuit is in an open state, the switching unit conducts the DC power supply and the power supply end of the signal processing module 3 to ensure the stable operation of the signal processing module 3.

[0051] Referring to Figure 1 and Figure 2 , the thin film capacitor 2 is connected with a positioning module 5. Specifically, the positioning module 5 is embedded between the protective layer 23 and the conductive layer 21. The positioning module 5 can be a Beidou chip or a GPS chip, which is used to generate position data and transmit the position data to the control terminal 4 in real time. When the control terminal 4 receives a warning signal, the relevant responsible person can know the location of the damaged thin film capacitor 2 through the corresponding position data, and then rush to the scene in time to protect the pipeline 6. The control terminal 4 can be a PLC control system or a PC terminal.

[0052] As a variation of this embodiment, the positioning module 5 is integrated in the signal processing module 3, connected to the control terminal 4, and transmits the position data to the control terminal 4 in real time.

[0053] It should be noted that when laying the thin film capacitor 2, the positioning module 5 and the signal processing module 3 are arranged on one side close to the outer peripheral surface of the pipeline 6. When others damage the thin film capacitor 2, the conductive layer 21 is preferentially damaged rather than the positioning module 5 or the signal processing module 3. In addition, since the lines, the positioning module 5 and the signal processing module 3 in the system are all located between the protective layer 23 and the conductive layer 21 and on one side close to the outer peripheral surface of the pipeline 6, it is not easy for others to damage the system lines, the signal processing module 3 and the positioning module 5 without damaging the conductive layer 21.

[0054] The implementation principle of Embodiment 1 is as follows: The AC power supply circuit 1, the thin film capacitor 2 and the signal processing module 3 form an AC circuit, and the signal processing module 3 acquires the electrical signal data in the thin film capacitor 2. When the thin film capacitor 2 is damaged, the conductive layer 21 breaks, resulting in a sudden change in the electrical signal data. The signal processing module 3 generates a corresponding warning signal and transmits the warning signal to the control terminal 4. After receiving the warning signal, the control terminal 4 gives an alarm or controls the alarm connected to it to give an alarm. After hearing the alarm, the relevant responsible person can know the location of the damaged thin film capacitor 2 by checking the corresponding position data, and then rush to the scene to protect the pipeline. Since the acquisition and transmission of the electrical signal data are relatively stable and not easily interfered by the external environment, it helps to reduce the false alarm rate of the warning system. In addition, multiple thin film capacitors 2 fully cover the outer peripheral surface of the pipeline, which helps to improve the warning accuracy and provide full warning protection for the pipeline.

[0055] Example 2

[0056] Refer to Figure 6 , the difference between this embodiment and Embodiment 1 is that multiple thin-film capacitors 2 are provided, and an overlapping section is formed between adjacent thin-film capacitors 2. The overlapping section is the overlapping part of adjacent thin-film capacitors 2, such as △1 and △2 in the figure. When others damage the overlapping section, the control terminal 4 receives two warning signals simultaneously, enabling the relevant person in charge to more accurately determine the position where the thin-film capacitor 2 is damaged and improving the warning accuracy.

[0057] Example 3

[0058] Refer to Figure 7 and Figure 8 , the difference between this embodiment and Embodiment 1 is that one signal processing module 3 is provided, and the signal processing module 3 is connected to multiple thin-film capacitors 2 for acquiring the electrical signal data generated by each thin-film capacitor 2. A difference module 31 is provided in the signal processing module 3, and the difference module 31 is used to perform differential numbering on the electrical signal data in multiple thin-film capacitors 2. The differential numbering means that the numbers of the electrical signal data in each thin-film capacitor 2 are all different. The difference module 31 is also used to number the warning signal according to the number of the electrical signal data corresponding to the warning signal when the signal processing module 3 generates a warning signal. The relevant person in charge views the number of the warning signal through the control terminal 4 to know the position where the damaged thin-film capacitor 2 is located.

[0059] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A pipeline warning system, characterized in that: It includes an AC power supply circuit (1) for providing alternating current; a DC power supply circuit (7) for providing direct current; a thin-film capacitor (2) connected to the AC power supply circuit (1); a signal processing module (3) and a control terminal (4); the signal processing module (3) is connected to the DC power supply circuit (7) and is used to obtain the electrical signal data in the thin-film capacitor (2) and generate a warning signal according to the change of the electrical signal data; the signal processing module (3) is also used to transmit the warning signal to the control terminal (4); the control terminal (4) is used to give an alarm after obtaining the warning signal; wherein, a plurality of the thin-film capacitors (2) are provided, and the plurality of thin-film capacitors (2) are sequentially laid along the outer periphery of the pipeline; an overlapping section is formed between adjacent thin-film capacitors (2); wherein, the thin-film capacitor (2) includes two conductive layers (21) arranged in a stacked manner and used to form two electrodes of the capacitor, an insulating layer (22) is arranged between the two conductive layers (21), and a protective layer (23) for covering the conductive layer (21) is arranged on one side of the conductive layer (21) away from the insulating layer (22); and, the conductive layer (21) is formed by laying conductive strips, the width of the conductive strip is set between 0.5 cm and 5 cm, the thickness of the conductive layer (21) is set between 0.1 μm and 1 cm, and the conductive strip is reciprocally laid in a zigzag form from one side of the insulating layer (22) to the other side, and a plurality of gaps are formed during this process; wherein, when the thin-film capacitor (2) is damaged, the electrical signal data changes suddenly, the signal processing module (3) generates a corresponding warning signal and transmits the warning signal to the control terminal (4); a difference module (31) is provided in the signal processing module (3); the difference module (31) is used to differentially number the electrical signal data in the plurality of thin-film capacitors (2); the difference module (31) is also used to number the warning signal according to the number of the electrical signal data corresponding to the warning signal when the signal processing module (3) generates the warning signal.

2. The pipeline early warning system according to claim 1, wherein: The thin-film capacitor (2) is fixedly connected to the pipeline.

3. The pipeline early warning system according to claim 1, wherein: One signal processing module (3) is provided, and each thin-film capacitor (2) is connected to the signal processing module (3).

4. The pipeline early warning system according to claim 1, characterized in that: A plurality of signal processing modules (3) are provided, and the plurality of signal processing modules (3) are in one-to-one correspondence communication connection with the thin-film capacitors (2).

5. The pipeline early warning system according to claim 4, characterized in that: The thin-film capacitor (2) is connected with a positioning module (5), and the positioning module (5) is used to generate position data and transmit the position data to the control terminal (4).

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