Liquid leakage detection apparatus and liquid leakage detection method

Abstract

A liquid leakage detection apparatus (1) and detection method. The liquid leakage detection apparatus (1) comprises an isolation layer (4) and a thin film detection circuit arranged on an outer wall of the isolation layer (4), the thin film detection circuit comprising at least one detection loop (3), wherein several openings (12) are provided in positions of the isolation layer (4) that correspond to the detection loop (3), and the isolation layer (4) can be used for covering a pipe to be subjected to detection. Whether liquid leakage has occurred can be simply determined by means of acquiring a resistance change of the detection loop (3), and multiple liquid leakage detection apparatuses (1) can be connected in series and then wrapped around multiple sections of a single pipe, alternatively, the multiple liquid leakage detection apparatuses (1) can be connected in series and then wrapped around multiple independent pipes in a manner of corresponding to each other on a one-to-one basis, so that liquid leakage detection of the multiple pipes is realized, and when liquid leakage occurs in a pipe, the position of the leaking pipe can be directly located, thereby reducing the liquid leakage detection time and reducing the cost.

Description

Liquid leakage detection device and liquid leakage detection method

[0001] The present invention claims priority to a Chinese patent application filed with the Patent Office of China on December 29, 2023, with application number 202311868315.3 and entitled “Liquid Leakage Detection Device and Liquid Leakage Detection Method,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of liquid leakage detection, and in particular to a liquid leakage detection device and a liquid leakage detection method. Background Art

[0003] Currently, leakage detection solutions for pipelines with small outer diameters, complex structures, and used in complex working conditions are still immature. This is not only because the materials and structures of pipelines are complex and diverse, but also because the types of liquids flowing in the pipelines are also diverse. This brings great difficulties and challenges to the development of their detection performance and reliability.

[0004] The mainstream method for detecting liquid leakage is to collect the leaked liquid in a water collection tray or a water receiving tray, and then determine whether there is liquid in the water collection tray or the water receiving tray to determine whether there is a leak. For example, the following patent documents are all used for detecting liquid leakage:

[0005] Patent documents with Chinese patent publication number "CN105988138A" and title "Weakly Acidic Solution Leakage Sensing Device" and Chinese patent publication number "CN202613059U" and title "A Sheathed Liquid Leakage Detection Cable" disclose that liquid leakage detection ropes or detection belts are mainly used for larger flat space detection, such as the ground, the bottom of equipment, and along underground pipelines. The principle is to use the liquid leakage to contact the water-immersed rope, causing the impedance or capacitive reactance of the sensing cable to change.

[0006] Japanese patent publication number "JP5782082B2" and titled "Leak Detector Using Fiber Optic Funnel" discloses a method for detecting liquid leaks using optical signals. The leak detection optical fiber utilizes light contacting the optical fiber surface, causing the optical signal to refract at the leak site. Leak detection is achieved by detecting changes in the signal at the receiving end.

[0007] Japanese patent publication number "JP2007163255A" and titled "Water Leakage Detection Method, Water Leakage Detection System, and RFID Tag" discloses a liquid leakage detection method using RFID technology. The principle is to use the fact that the capacitive reactance of the detection liquid is significantly greater than that of air, and the ultra-high frequency signal transmission will be affected by the contact with the liquid to detect.

[0008] In scenarios where multiple pipes are connected in series, especially in liquid-cooled data centers where the pipelines need to maintain long-term effective operation, when a pipe leak occurs, the leak location must be located as quickly as possible to resolve the problem as quickly as possible. However, the existing leakage detection technologies mentioned above can only determine whether a leak exists. At this stage, it is impossible to locate the leak location or area at a low cost. The leak location needs to be manually confirmed on site, resulting in high leak detection costs and a long time consumption. Summary of the Invention

[0009] The present invention provides a liquid leakage detection device and a detection method, which are used to solve the technical problem that pipeline leakage cannot be located in time, resulting in high cost and long time consumption during pipeline leakage detection.

[0010] In order to solve the above technical problems, in the first aspect, the present invention proposes a liquid leakage detection device, comprising: an isolation layer; and a thin film detection circuit arranged on the outer wall of the isolation layer, the thin film detection circuit including at least one detection electrode loop; wherein: a plurality of openings are provided on the isolation layer at positions corresponding to the detection electrode loop, and the isolation layer can be used to cover the pipeline to be detected.

[0011] In some embodiments, the liquid leakage detection device includes multiple devices, and the multiple liquid leakage detection devices are connected through thin film electrode connectors to form a cascade liquid leakage detection device;

[0012] In the cascade liquid leakage detection device, the detection electrode loops of the plurality of thin film detection circuits are connected in series through the thin film electrode connector to form a detection loop.

[0013] In some embodiments, the plurality of liquid leakage detection devices are respectively coated on a plurality of different pipe sections; on different pipes, the openings of the isolation layers of the liquid leakage detection devices correspond to different detection circuits.

[0014] In some embodiments, the thin film detection circuit on each section of the pipeline has at least two detection electrode loops.

[0015] In some embodiments, the liquid leakage detection device is used to be respectively coated on multiple different sections of pipes; wherein each section of the pipe corresponds to a detection circuit.

[0016] In some embodiments, the leakage detection device is used to be respectively coated on multiple different pipes; wherein the number of detection circuits required for m pipes is a, m≤(2 a -1), where a and m are both positive integers.

[0017] In some embodiments, the thin film electrode connector is a flip-up type thin film electrode connector or a drawer type thin film electrode connector, and / or, the thin film electrode connector is a thin film electrode connector with a spacing of 0.5 mm or 1.25 mm or 2.54 mm, and the number of pins of the thin film electrode connector is four times that of the detection electrode circuit connected to it.

[0018] In some embodiments, the liquid leakage detection device further includes a shell and a base layer, the base layer is arranged on the inner side of the shell, and the thin film detection circuit is installed on the base layer.

[0019] In a second aspect, the present invention further provides a liquid leakage detection method applied to a liquid cooling pipe, the liquid cooling pipe comprising a pipe and a liquid leakage detection device as described in the first aspect coated on the pipe, the method comprising the following steps:

[0020] The resistance change of the detection electrode circuit of the leakage detection device is periodically obtained. When the resistance change of the detection electrode circuit exceeds a preset threshold, it is determined that the pipeline where the leakage detection device is located is leaking.

[0021] In a third aspect, the present invention further provides another liquid leakage detection method, which is applied to a liquid cooling pipe, wherein the liquid cooling pipe comprises multiple pipe sections and a cascade thin film electrode as described in the second aspect, formed by connecting multiple liquid leakage detection devices. The method comprises:

[0022] Periodically obtaining the resistance value between each group of pins connected to the thin film electrode connector and the leakage detection device on all detection circuits;

[0023] When the change in the resistance between any group of pins compared to the previous cycle exceeds a preset threshold, the target detection circuit corresponding to the group of pins is obtained;

[0024] The position of the leaking pipe is determined according to the pin combination relationship of the target detection circuit.

[0025] The liquid leakage detection device provided by the above embodiment of the present invention has at least the following beneficial effects:

[0026] The leakage detection device is configured with an opening and a detection electrode circuit, and is used to be wrapped around a corresponding pipe. When a leak occurs in the pipe, the leaked liquid contacts the detection electrode circuit through the opening, changing the resistance of the detection electrode circuit. Thus, by obtaining the change in resistance of the detection electrode circuit, it is possible to determine whether a leak has occurred. In this way, the leakage detection device, as an independent, standard leakage detection component, can be wrapped around different pipes. The resistance change generated by the detection electrode circuits in different leakage detection devices can be used to indicate whether a leak exists in the different pipes, thereby enabling leakage detection and location in different pipes. The leakage detection device has a simple structure and flexible assembly methods, making it easy to promptly locate the location of leaks in multiple pipe sections, reducing the time and cost of leakage detection.

[0027] The liquid leakage detection method provided in the above embodiment has the same concept as the corresponding liquid leakage detection device embodiment, and thus has at least the same technical effect as the corresponding liquid leakage detection device embodiment, and will not be described in detail here.

[0028] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0030] FIG1 is a schematic structural diagram of a liquid leakage detection device according to an embodiment.

[0031] FIG2 is a cross-sectional view of the liquid leakage detection device shown in FIG1 .

[0032] FIG3 is a schematic structural diagram of a cascade liquid leakage detection device according to an embodiment.

[0033] FIG4 is a schematic structural diagram of a cascade liquid leakage detection device according to another embodiment.

[0034] FIG5 is a schematic structural diagram of a cascade liquid leakage detection device according to another embodiment.

[0035] FIG6 is a flow chart of a liquid leakage detection method according to an embodiment.

[0036] FIG7 is a flow chart of a liquid leakage detection method in another embodiment.

[0037] Explanation of the accompanying drawings: 1. Liquid leakage detection device; 1-1. First liquid leakage detection device; 1-2. Second liquid leakage detection device; 1-3. Third liquid leakage detection device; 10. Thin film detection circuit; 11. Detection electrode loop; 111. Detection electrode; 12. Opening; 14. Thin film detection circuit; 15. Housing; 16. Base layer; 2. Thin film electrode connector; 3. Detection circuit; 3-1. First detection circuit; 3-2. Second detection circuit; 3-3. Third detection circuit; 4. Isolation layer. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0039] In addition, unless otherwise defined, the technical or scientific terms used in the description of this application should have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The words "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inside," and "outside" used in the description of this application are only used to indicate relative directions or positional relationships, and do not imply that the device or component must have a specific orientation, be constructed, or operate in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. Therefore, they should not be understood as limitations on this application. The words "first," "second," "third," and similar terms used in the description of this application are used only for descriptive purposes to distinguish different components and should not be understood to indicate or imply relative importance. The words "one," "an," or "the" used in the description of this application should not be understood as absolute limitations on quantity, but should be understood as meaning the presence of at least one. The words "include" or "comprises" and similar terms used in the description of this application mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0040] It should also be noted that, unless otherwise clearly specified and limited, the words "install", "connect", "connect" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. Those skilled in the art can understand their specific meanings in this application based on the specific circumstances.

[0041] As shown in FIG1 , a liquid leakage detection device 1 of this embodiment includes: an isolation layer 13; and a thin film detection circuit 10 provided on the outer wall of the isolation layer 13, the thin film detection circuit 10 including at least one detection electrode loop 11; wherein: a plurality of openings 12 are provided on the isolation layer 13 at positions corresponding to the detection electrode loop 11, and the isolation layer 13 can be used to cover the pipeline to be detected.

[0042] Optionally, please refer to Figure 2. The leakage detection device 1 of this embodiment further includes a shell 15 and a base layer 16. The base layer 16 is arranged on the inner side of the shell 15, and the thin film detection circuit 10 is installed on the base layer 16. The shell is a wrapped shell, and the base layer 16 is bonded to the inner side of the shell 15. It should be noted that the bonding method used in this embodiment to connect the base layer 16 and the shell 15 is only for exemplary description and cannot be understood as a limitation of the present application. In other embodiments, any other connection method can be used to connect the base layer 16 and the shell 15 together, and the thin film detection circuit 10 is arranged on the inner side of the base layer 16. The thin film detection circuit 10 is wrapped. The thin film detection circuit 10 includes at least one detection electrode loop 11, which includes a detection electrode and a conductor for forming a loop. An isolation layer 13 is provided on the inner side of the detection electrode loop 11. The isolation layer 13 has a through opening 12 at a position corresponding to the detection electrode, so that when the pipeline leaks, the leaked liquid can flow into the thin film detection circuit 10 through the opening 12. When the leakage detection device is wrapped on the pipeline, the isolation layer 13 can prevent the detection electrode loop 11 in areas other than the opening 12 from contacting the pipeline. When the pipeline leaks, the liquid will only affect the detection electrode loop 11 in the area of ​​the opening 12 of the isolation layer 13, and the detection electrode loop 11 outside the area of ​​the opening 12 will not be affected by the liquid.

[0043] Specifically, as shown in Figure 1, in this embodiment, the thin film detection circuit 10 includes two detection electrode loops 11, and each detection electrode loop 11 has four openings 12. In other embodiments, the thin film detection circuit 10 can also be provided with any number of detection electrode loops 11, such as one, three, four or more, and each detection electrode loop 11 can also have one, two, three, five or more openings 12.

[0044] In this embodiment, the ends of all detection electrode loops 11 are connected to a signal acquisition device, and the number of pins on the signal acquisition device is twice the number of detection electrode loops 11. Since each detection electrode loop 11 has two lines, input and output, as shown in FIG1 , port A1 represents the input end of one detection electrode loop 11, and port A2 represents the output end of the detection electrode loop 11. The number of pins on the signal acquisition device usually corresponds one-to-one to the input and output of the detection electrode loop 11, as shown in FIG1 , where the dotted box represents the opening 12. When there are two detection electrode loops 11, the signal acquisition device connects the input and output of the two groups of detection electrode loops 11, respectively, with a total of four ports A1, A2, B1, and B2, and periodically connects two ports in different groups of detection electrode loops 11, for example: refreshing in sequence with six situations of A1A2, A1B1, A1B2, A2B1, A2B2, and B1B2. Among them, the signal acquisition device can periodically obtain signals in six situations: A1A2, A1B1, A1B2, A2B1, A2B2, and B1B2. The signal can be a current, voltage, or resistance signal. The signal acquisition device in this embodiment specifically collects the resistance value between the two ports.

[0045] In the leakage detection device 1 of this embodiment, when a pipeline leaks, the liquid flows into the opening 13 and contacts the detection electrode circuit 11, which will cause the two detection electrode circuits 11 to be connected, wherein the resistance values ​​obtained by the four ports A1B1, A1B2, A2B1, and A2B2 will all change significantly, so that by obtaining the resistance change of the detection electrode circuit 11, it is possible to determine whether a leakage has occurred, and the leakage information of the corresponding pipeline can be identified by the leakage detection device 1. In this way, the leakage detection device 1, as an independent, standard leakage detection component, can be separately coated on different pipelines in multiple ways, and the resistance change generated by the detection electrode circuits 11 in different leakage detection devices 1 can be used to correspondingly characterize whether there is a leakage in the different pipelines, thereby realizing leakage detection and positioning of different pipelines. The leakage detection device 1 has a simple structure and flexible combination method, which facilitates the timely positioning of the leakage position of multiple pipeline sections, reducing the time and cost of leakage detection.

[0046] As shown in Figure 2, in some embodiments, the number of leakage detection devices 1 can be multiple, and the multiple leakage detection devices 1 are connected through a thin film electrode connector 2 to form a cascade leakage detection device, and the detection electrode circuits (11) of the multiple leakage detection devices 1 form a cascade thin film electrode; in the cascade thin film electrode, the detection electrode circuits 11 of the multiple leakage detection devices 1 are connected in series through the thin film electrode connector 2 to form a detection circuit 3.

[0047] In the case where there are multiple sections of liquid cooling pipelines that are connected by various forms of joints, in this embodiment, multiple leakage detection devices 1 can be respectively wrapped around the outside of the corresponding different sections of the pipeline to match the shape and size of the pipeline. In order to better match the liquid cooling pipeline containing multiple sections of pipelines, a thin film electrode connector 2 is further provided between the leakage detection devices 1 respectively wrapped around the different sections of the pipeline to connect them in series. Among them, the thin film electrode connector 2 can correspond to the joints between the different sections of the pipeline, and the connecting terminals at both ends of the thin film electrode connector 2 are respectively connected to two detection electrode circuits 11. The detection electrode circuits 11 of all leakage detection devices 1 can be connected in series through the thin film electrode connector 2 to form a cascade thin film electrode detection circuit 3. The resistance changes detected by the detection electrode circuits 11 of the leakage detection devices 1 at different positions correspond to the resistance changes in the detection circuit 3 where the detection electrode circuits 11 corresponding to the different sections of the pipeline are located. Therefore, the resistance changes detected by the different detection circuits 3 can be used to correspond to the locations where leakage occurs in different sections of the pipeline. Optionally, in the cascade thin-film electrode, the number of detection circuits 3 may be the same as the number of detection electrode circuits 11 included in the leakage detection device 1 having the maximum number of detection electrode circuits 11, or the detection electrode circuits 11 corresponding to some sections of pipelines in the leakage detection device 1 corresponding to multiple sections of pipelines may be selected and connected in series to form detection circuits 3. That is, the number of detection circuits 3 may be less than the number of detection electrode circuits 11 included in the leakage detection device 1 having the maximum number of detection electrode circuits 11.

[0048] In this embodiment, the thin film electrode connector 2 is a flip-up thin film electrode connector or a drawer-type thin film electrode connector. The thin film electrode connector 2 is a thin film electrode connector with a pitch of 0.5 mm, 1.25 mm or 2.54 mm. The number of pin pins of the thin film electrode connector 2 is four times that of the detection electrode loop 11 connected to it. For example, when the thin film electrode connector 2 is connected to two detection loops 3, since each detection loop 3 has two wires, an input line and an output line, and each line must pass through the thin film electrode connector 2, each detection loop 3 formed based on multiple detection electrode loops 11 connected in series needs to occupy 4 pin pins of the thin film electrode connector 2.

[0049] In this embodiment, a plurality of liquid leakage detection devices 1 are respectively coated on a plurality of different pipe sections; on different pipes, the openings 12 of the isolation layer 13 of the liquid leakage detection device 1 correspond to different detection circuits 3 .

[0050] According to the number of sections of the pipeline, it is necessary to use a leakage detection device 1 with different numbers of detection electrode loops 11 to wrap all the pipelines, thereby forming different numbers of detection loops 3, as shown in Figures 3 and 4. In this embodiment, three sections of pipelines and three detection loops 3 are used as an example for explanation, where A1A2 represents the first detection loop 3-1, B1B2 represents the second detection loop 3-2, and C1C2 represents the third detection loop 3-3. From left to right, they are the first pipeline, the second pipeline, and the third pipeline, respectively corresponding to the first leakage detection device 1-1, the second leakage detection device 1-2, and the third leakage detection device 1-3, where the first detection loop 3-1 and the second detection circuit 3-2 both cover all the pipelines, and the third detection circuit 3-3 covers the second pipeline and the third pipeline. On the first pipeline, the opening 12 of the isolation layer 13 of the first leakage detection device 1-1 is opened at the corresponding position of the first detection circuit 3-1 and the second detection circuit 3-2; on the second pipeline, the opening 12 of the isolation layer 13 of the second leakage detection device 1-2 is opened at the corresponding position of the first detection circuit 3-1 and the third detection circuit 3-3; on the third pipeline, the opening 12 of the isolation layer 13 of the third leakage detection device 1-3 is opened at the corresponding positions of the first detection circuit 3-1, the second detection circuit 3-2 and the third detection circuit 3-3.

[0051] It should be noted that the use of three sections of pipelines as an example in this embodiment should not be construed as limiting the present application. In other embodiments, four, five or even more sections of pipelines can be inspected. At the same time, for each additional pipeline, a detection circuit 3 can be added accordingly. The newly added detection circuit 3 can be used to detect whether there is leakage, so as to determine whether the added pipeline is leaking.

[0052] In the cascade thin film electrode, since the openings 12 of the isolation layer 13 of different leakage detection devices 1 correspond to different detection circuits 3, for example, the opening 12 of the isolation layer 13 of the first leakage detection device 1-1 corresponds to the first detection circuit 3-1 and the second detection circuit 3-2, then the openings 12 of the isolation layer 13 of the leakage detection devices 1 on other pipelines cannot correspond to the first detection circuit 3-1 and the second detection circuit 3-2 at the same time. When the pipeline leaks, the liquid will cover the opening 12 of the isolation layer 13 of the leakage detection device 1 on the pipeline, and the resistance value of the detection circuit 3 contacted by the liquid will change. By detecting the changes in the resistance values ​​collected by all the detection circuits 3, the specific position of the leaking pipeline can be determined, thereby realizing timely positioning of the pipeline leakage position, which is time-saving and low-cost.

[0053] Since the signal acquisition device periodically connects the two interfaces of the detection loop 3 to collect data between the two interfaces, in this embodiment, the three-way detection loop 3 has a total of 6 ports A1, A2, B1, B2, C1, and C2 connected to the signal acquisition device, which will generate There are 15 possibilities in total. For example, when the first pipeline leaks, at this time, the opening 12 of the isolation layer 13 of the first leakage detection device 3-1 on the first pipeline will flow into the liquid, making the first detection circuit 3-1 and the second detection circuit 3-2 conductive, thereby causing the resistance value between the ports A2B1 collected by the signal acquisition device to change, and at this time the resistance value between the ports A2C1 does not change; when the second pipeline leaks, the opening 12 of the isolation layer 13 of the second leakage detection device 1-2 on the second pipeline will flow into the liquid, making the first detection circuit 3-1 and the second detection circuit 3-2 conductive, thereby causing the resistance value between the ports A2B1 collected by the signal acquisition device to change, and at this time the resistance value between the ports A2C1 does not change; 1 and the third detection circuit 3-3 are connected, so that the resistance value between the ports A2C1 collected by the signal acquisition device changes, and the resistance value between the ports A2B1 does not change at this time; when the third pipeline leaks, the opening 12 of the isolation layer 13 of the third leakage detection device 1-3 on the third pipeline will flow into the liquid, and the first detection circuit 3-1, the second detection circuit 3-2 and the third detection circuit 3-3 will all be connected through the liquid, so that the resistance value between the ports A2B1 and the port A2C1 collected by the signal acquisition device will all change.

[0054] In this embodiment, the leakage detection device 1 on each section of the pipeline has at least two detection electrode loops 11. When one detection circuit loop 11 fails, detection can still be performed through the other one, which greatly enhances reliability.

[0055] The working principle of this embodiment is as follows: Since a detection electrode circuit 11 is provided inside the leakage detection device 1, each detection electrode circuit 11 is provided with a detection electrode 111 at the opening 12 of the isolation layer 13. When the liquid leaking from the pipeline contacts the detection electrode 111, the resistance of the detection circuit 3 corresponding to the detection electrode circuit 11 will change. According to this principle, for example, when the resistance between ports A2B1 collected by the signal acquisition device changes, and the resistance between ports A2C1 does not change at this time, it is determined that the first pipeline is leaking; when the resistance between ports A2C1 collected by the signal acquisition device changes, and the resistance between ports A2B1 does not change at this time, it is determined that the second pipeline is leaking; when the resistance between ports A2B1 and A2C1 collected by the signal acquisition device both change, it is determined that the third pipeline is leaking.

[0056] The liquid leakage detection device of this embodiment can quickly and accurately locate the position of the leaking pipeline, greatly reducing the time for liquid leakage detection and positioning, and reducing the detection cost.

[0057] In some embodiments, in the cascade thin film electrode, each section of the pipeline corresponds to a detection circuit 3 .

[0058] Take three sections of pipelines and three detection electrode loops as an example for explanation, where A1A2 represents the first detection loop 3-1, B1B2 represents the second detection loop 3-2, and C1C2 represents the third detection loop 3-3, which are separated by a thin film electrode connector 3. From left to right, they are the first pipeline, the second pipeline, and the third pipeline. The first detection loop 3-1 covers all pipelines, the second detection loop 3-2 covers the second and third pipelines, and the third detection loop 3-3 only covers the third pipeline.

[0059] In this embodiment, the number of detection loops 3 is the same as the number of pipelines. Each detection loop 3 only needs to have an opening in one pipeline. Therefore, the signal acquisition device only needs to obtain the resistance change of each detection loop 3, without having to obtain the data of every two connection ports through periodic refreshing. For example, when the resistance value of A1A2 changes, it means that the first pipeline is leaking; when the resistance value of B1B2 changes, it means that the second pipeline is leaking; when the resistance value of C1C2 changes, it means that the third pipeline is leaking. This can further reduce the data acquisition time, reduce the difficulty and complexity of data acquisition.

[0060] In some embodiments, referring to FIG. 5 , the number of detection loops 3 required for m pipelines is a, m≤(2 a -1), where a and m are both positive integers.

[0061] Since each detection loop 3 only has two situations of "with opening" and "without opening" on each section of the pipeline, a detection loop 3 can generate (2 a -1) combinations are possible. Each combination is assigned to each section of the pipeline, so that a detection loop 3 can be used for a maximum of (2 a -1) Detection of a section of pipeline. For example, 7 sections of pipeline only need 3 detection circuits 3 to be realized. A, B, and C represent the three detection circuits 3 respectively. Then there will be the following results in total: A, B, AB, C, AC, BC, and ABC. The combination of these 7 circuits respectively opens corresponding openings on the 7 sections of pipeline. The signal acquisition device collects the resistance values ​​of these 7 situations. When the corresponding resistance value changes, the corresponding pipeline can be determined. Therefore, according to the number of pipelines, the required number of detection circuits 3 can be known, and the number of detection circuits 3 is related to the detection electrode circuit 11 of the leakage detection device 1. The leakage detection device 1 with the lowest total number of detection electrode circuits 11 can be selected for combination, thereby reducing the structural complexity and structural cost, and at the same time reducing the area occupied by the detection electrode circuit 11.

[0062] In this embodiment, three sections of pipeline are taken as an example for explanation, then two detection circuits 3 can realize the detection of three sections of pipeline, wherein A1A2 represents the first detection electrode circuit 3-1, B1B2 represents the second detection electrode circuit 3-2, which is divided by the thin film electrode connector 2, and from left to right are the first pipeline, the second pipeline and the third pipeline respectively. The first detection circuit 3-1 covers the first pipeline and the second pipeline, and the second detection circuit 3-2 covers the second pipeline and the third pipeline. On the first pipeline, the opening 12 of the isolation layer 13 of the leakage detection device 1 is opened at the corresponding position of the first detection circuit 3-1, and on the second pipeline; on the second pipeline, the opening 12 of the isolation layer 13 of the leakage detection device 1 is opened at the corresponding position of the second detection circuit 3-2; on the third pipeline, the opening 12 of the isolation layer 13 of the leakage detection device 1 is opened at the corresponding position of the first detection circuit 3-1 and the second detection circuit 3-2.

[0063] When the signal acquisition device detects a change in the resistance value of A1A2 and no change in B1B2, it indicates that there is leakage in the first pipeline; when the signal acquisition device detects a change in the resistance value of B1B2 and no change in A1A2, it indicates that there is leakage in the second pipeline; when the signal acquisition device detects a change in the resistance values ​​of both A1A2 and B1B2, it indicates that there is leakage in the third pipeline. In other embodiments with more pipelines, the detection principle is the same as that of this embodiment.

[0064] Compared with embodiment 1 and embodiment 2, this embodiment can achieve precise positioning of the leaking pipeline with a minimum number of detection electrode loops 1, greatly reducing the structural complexity of the thin film detection circuit 10, and reducing material consumption and cost.

[0065] On the other hand, the present application also provides a leakage detection method for a liquid cooling pipe, referring to FIG6 . The liquid cooling pipe includes a pipe and a leakage detection device 1 wrapped around the pipe. The method includes the following steps:

[0066] S11, periodically acquiring the resistance change of the detection electrode circuit.

[0067] S12: When the resistance change of the detection electrode circuit exceeds a preset threshold, it is determined that the pipeline is leaking.

[0068] By using the liquid leakage detection method of this embodiment, it is possible to promptly and accurately determine whether a pipeline is leaking.

[0069] On the other hand, the present application also provides another method for detecting liquid leakage in a liquid cooling pipe, referring to FIG. 7 . The liquid cooling pipe includes multiple pipe sections and a cascaded thin film electrode as shown in the embodiment of FIG. 3 or FIG. 4 . The method includes:

[0070] S21, periodically obtains the resistance value between every two pins on all detection circuits.

[0071] Each detection electrode circuit 11 has two pins, and N detection circuits have a total of 2N pins. The signal acquisition device periodically collects The most comprehensive resistance data between pins can be obtained by grouping data.

[0072] S22: When the change in the resistance between the two pins compared to the previous cycle exceeds a preset threshold, a detection circuit corresponding to the pins is obtained.

[0073] S23, determining the location of the leaking pipe according to the pin combination relationship of the detection circuit.

[0074] Taking the cascade thin film electrode in the embodiment shown in Figure 3 as an example, the signal acquisition device periodically collects resistance data between 15 groups of ports, and the 15 groups of ports are A1A2, A1B1, A1B2, A1C1, A1C2, A2B1, A2B2, A2C1, A2C2, B1B2, B1C1, B1C2, B2C1, B2C2, and C1C2. When the first pipeline corresponding to the first leakage detection device 1-1 leaks, the resistance values ​​of A1A2, A1B1, A1B2, A2B1, A2B2, and B1B2 will all change, and at the same time, the resistance values ​​of A1C1, A1C2, A2C1, A2C2, B1C1, B1C2, B2C1, B2C2, and C1C2 will not change; when the first pipeline corresponding to the second leakage detection device 1-2 leaks, When leakage occurs in the second pipeline, the resistance values ​​of A1A2, A1C1, A1C2, A2C1, A2C2, and C1C2 will all change, while the resistance values ​​of A1B1, A1B2, A2B1, A2B2, B1B2, B1C1, B1C2, B2C1, and B2C2 will not change. When leakage occurs in the third pipeline corresponding to the third leakage detection device 1-3, the resistance values ​​of A1A2, A1B1, A1B2, A1C1, A1C2, A2B1, A2B2, A2C1, A2C2, B1B2, B1C1, B1C2, B2C1, B2C2, and C1C2 will all change. Based on the resistance changes at different ports, it can be determined whether liquid has entered the detection electrode 111 on the corresponding detection circuit 3, and then the location of the leaking pipeline can be determined.

[0075] The leakage detection method of this embodiment can be used to detect leakage in multiple sections of pipelines, and can promptly and accurately determine whether a pipeline is leaking, and can also determine the specific location of the leaking pipeline.

[0076] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A liquid leakage detection device, characterized in that, Comprising: An isolation layer (4); and A thin-film detection circuit (10) provided on the outer wall of the isolation layer (4), the thin-film detection circuit (10) including at least one detection electrode loop (11); Wherein: A plurality of openings (12) are provided at positions on the isolation layer (4) corresponding to the detection electrode loops (11), and the isolation layer (4) is used to cover the pipeline to be detected.

2. The liquid leakage detection device according to claim 1, wherein The liquid leakage detection device (1) includes a plurality of them, and a plurality of the liquid leakage detection devices (1) are connected through a thin-film electrode connector (2) to form a cascaded liquid leakage detection device; In the cascaded liquid leakage detection device, the detection electrode loops (11) of a plurality of the thin-film detection circuits are connected in series through the thin-film electrode connector (2) to form a detection loop (3).

3. The liquid leakage detection device according to claim 2, characterized in that, A plurality of the liquid leakage detection devices (1) are respectively covered on multiple different pipelines; On different pipelines, the detection loops (3) corresponding to the openings (12) of the liquid leakage detection device (1) are all different.

4. The liquid leakage detection device according to claim 3, wherein Each thin-film detection circuit (10) on each pipeline has at least two of the detection electrode loops (11).

5. The liquid leakage detection device according to claim 2, characterized in that, The liquid leakage detection device (1) is used to be respectively covered on multiple different pipelines; Wherein, each pipeline corresponds to a detection loop (3).

6. The liquid leakage detection device according to claim 2, wherein A plurality of the liquid leakage detection devices (1) are used to respectively cover multiple different sections of pipelines; wherein, the number of detection circuits (3) required for m pipelines is a, and m ≤ (2 a - 1), where both a and m are positive integers.

7. The liquid leakage detection device according to claim 2, characterized in that, The thin-film electrode connector (2) is an upper flip-type thin-film electrode connector or a drawer-type thin-film electrode connector; and / or, The thin-film electrode connector (2) is a thin-film electrode connector (2) with a pitch of 0.5 mm or 1.25 mm or 2.54 mm, and the number of pin pins of the thin-film electrode connector (2) is four times the number of the detection electrode loops (11) connected thereto.

8. The liquid leakage detection device according to claim 1, wherein, It further includes a housing (15) and a base layer (16), the base layer (16) is provided inside the housing (15), and the thin-film detection circuit (10) is installed on the base layer (16).

9. A liquid leakage detection method, applied to a liquid cooling pipeline, characterized in that The liquid-cooled pipeline includes a pipeline and the liquid leakage detection device as described in claim 1 covered on the pipeline, and the method includes the following steps: Periodically obtaining the resistance value change of the detection electrode loop of the liquid leakage detection device; When the resistance value change amount of the detection electrode loop exceeds a preset threshold, it is determined that the pipeline where the liquid leakage detection device is located leaks.

10. A liquid leakage detection method, applied to a liquid cooling pipeline, characterized in that, The liquid-cooled pipeline includes multiple pipelines and a cascaded liquid leakage detection device formed by connecting a plurality of liquid leakage detection devices as described in claim 1, and the method includes: Periodically obtaining the resistance value between each group of pins where the thin-film electrode connector is respectively connected to the liquid leakage detection device on all detection loops; When the change amount of the resistance value between any group of pins compared with the previous cycle exceeds a preset threshold, obtaining the target detection loop corresponding to this group of pins; Judging the position of the leaking pipeline according to the pin combination relationship of the target detection loop.

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