Cable joint and anomaly detection method thereof

Abstract

The invention relates to a cable joint and an anomaly detection method thereof. The cable joint comprises a shell, a temperature sensor, a microstrip antenna and a humidity sensitive element. Wherein the shell can be arranged at the end part of the cable; the temperature sensor is arranged in the shell and is used for detecting the temperature of the cable; the microstrip antenna comprises an antenna layer and a grounding layer, and the antenna layer and the grounding layer are arranged in the shell; and the humidity sensitive element is arranged in the shell and is arranged between the antenna layer and the grounding layer. When the humidity-sensitive element is in contact with water, the conductivity or the shape of the humidity-sensitive element is changed, so that the resonant frequency of the microstrip antenna is changed. When water enters the shell, the conductivity or the shape of the humidity-sensitive element can be changed, the humidity-sensitive element is arranged between the antenna layer and the grounding layer, so that the resonant frequency of the microstrip antenna composed of the antenna layer and the grounding layer is changed, a signal sent by the microstrip antenna is changed, and a user can receive an abnormal signal; therefore, whether water enters the cable joint or the temperature of the cable joint is too high is obtained, and timely maintenance is carried out.

Description

Technical Field

[0001] This application relates to the technical field of power transmission, and particularly to a cable joint and its abnormal detection method. Background Art

[0002] With the development of power technology, as the main way to transmit power, cables are increasingly used in the construction of power projects. Cables have various models according to their physical characteristics, and different models of cables usually need to be used in combination. During the construction process, different cables need to be connected or extended. To connect different cables, cable joints are usually set at the connection points of the cables, and different cables can be stably connected through the cable joints.

[0003] In the related art, the cable is installed inside the cable joint for connection. Since the cable joint has a certain degree of sealing, it can prevent the cable connection from being affected by the external environment (such as rainfall, strong wind, etc.). The cable joint needs to be set according to the position of the cable connection. Due to the complex construction site environment or design requirements, the cable joint may be set in underwater, inside the wall, or at a higher position, etc., where it is not easy to install and maintain.

[0004] However, during the use of the cable, the cable may heat up. If the temperature is too high, it may lead to a reduction in the service life of the cable or problems such as fire. Due to long-term use, the cable joint may become unstable in connection, resulting in water leakage at the cable joint. Since the cable joint may be installed in a position where it is not easy to install and maintain, and there is no corresponding detection device provided for the cable joint, it is impossible to detect whether there is a situation of too high temperature and water ingress at the cable joint, and it is difficult for the user to obtain the status of the cable joint and perform maintenance in a timely manner. Summary of the Invention

[0005] Based on this, in view of the problem that it is not easy to obtain the connection status of the cable joint, it is necessary to provide a cable joint and its abnormal detection method.

[0006] On the one hand, this application provides a cable joint, including:

[0007] A housing that can be installed at the end of the cable;

[0008] A temperature sensor, which is arranged inside the housing and is used to detect the temperature of the cable;

[0009] A microstrip antenna, including an antenna layer and a ground layer, and the antenna layer and the ground layer are arranged inside the housing;

[0010] A humidity-sensitive element, which is arranged inside the housing and between the antenna layer and the ground layer.

[0011] For the above cable joint, during use, the outer shell is installed on the outside of the cable. By providing a temperature sensor inside the outer shell, the temperature information of the cable and the outer shell can be obtained. The microstrip antenna and the humidity-sensitive element are both arranged inside the outer shell. When water enters the outer shell, the conductivity or shape of the humidity-sensitive element will change. Since the humidity-sensitive element is arranged between the antenna layer and the ground layer, the conductivity and shape of the humidity-sensitive element will cause the resonance frequency of the microstrip antenna composed of the antenna layer and the ground layer to change, thereby changing the signal emitted by the microstrip antenna. The user can remotely receive the abnormal signal, and thus the status of the cable joint (whether water ingress or overheating occurs) can be obtained and maintenance can be carried out in a timely manner.

[0012] In some embodiments, the humidity-sensitive element includes a humidity-sensitive pad, and the humidity-sensitive pad is clamped between the antenna layer and the ground layer.

[0013] In some embodiments, the cable joint further includes an elastic element. The elastic element is arranged inside the outer shell and is connected to the outer shell or the cable. When relative displacement occurs between the outer shell and the cable, the elastic element pushes the antenna layer or the ground layer, causing the distance between the antenna layer and the ground layer to change.

[0014] In some embodiments, the elastic element includes an elastic ring. The elastic ring is sleeved on the outer periphery of the cable and moves with the cable. The elastic ring contacts the antenna layer or the ground layer and is used to squeeze the antenna layer or the ground layer.

[0015] In some embodiments, the cable joint further includes a collar. The collar is arranged inside the outer shell and is sleeved on the outer periphery of the elastic element and / or the cable. The outer wall of the collar fits with the outer shell.

[0016] In some embodiments, the cable joint further includes a sealing ring. The sealing ring is arranged at the contact position between the outer surface of the outer shell and the cable. The sealing ring is sleeved on the outer periphery of the cable, and the outer wall of the sealing ring fits with the outer shell.

[0017] In some embodiments, the temperature sensor is electrically connected to the microstrip antenna, and the microstrip antenna is used to transmit the data detected by the temperature sensor.

[0018] In some embodiments, the outer shell includes a housing and a cover. The housing is installed at the end of the cable. An installation opening is provided on the surface of the housing, and the temperature sensor is detachably arranged in the installation opening along with the cover; the microstrip antenna and the humidity-sensitive element are both arranged inside the housing.

[0019] On the other hand, the present application also provides an abnormal detection method applicable to the above cable joint, which includes the following steps:

[0020] Obtain the resonance frequency of the microstrip antenna;

[0021] Determine whether the resonance frequency exceeds a preset range. When the resonance frequency exceeds the preset range, it is determined that there is an abnormality in the cable joint.

[0022] In some embodiments, the signal of the microstrip antenna is received by a receiving module. In the step of obtaining the resonance frequency of the microstrip antenna, the receiving module obtains the resonance frequency of the microstrip antenna at a preset moment or in real time;

[0023] Alternatively, in the step of obtaining the resonance frequency of the microstrip antenna, when the receiving module receives a detection instruction, the receiving module obtains the resonance frequency of the microstrip antenna according to the detection instruction.

[0024] For the above abnormal detection method of the cable joint, signal parameters of the cable and the outer shell in a normal connection state are obtained and recorded before the cable joint is used. During the use of the cable joint, if the detected parameters exceed the preset range, it can be determined that the cable joint is water-injected. Through the above method, it is possible to quickly determine whether the cable joint is water-injected. The detection process for abnormal conditions of the cable joint is simple, fast, and easy to operate. Description of the Drawings

[0025] Figure 1 It is a cross-sectional view of the outer shell of an embodiment of a cable joint of the present application along its symmetry plane.

[0026] Figure 2 is Figure 1 an enlarged view of part A in

[0027] Figure 3 It is a schematic flowchart of an embodiment of an abnormal detection method for a cable joint of the present application.

[0028] In the figure, 100, outer shell; 110, cable; 120, housing; 130, cover; 200, temperature sensor; 300, microstrip antenna; 310, antenna layer; 320, ground layer; 400, humidity-sensitive element; 500, elastic element; 510, elastic ring; 600, collar; 700, sealing ring. Detailed Embodiments

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0031] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0035] Referring to Figure 1 , Figure 1 FIG. shows a cross-sectional view of a cable joint along its symmetry plane in an embodiment of the present application. A cable joint provided in an embodiment of the present application includes a housing 100, a temperature sensor 200, a microstrip antenna 300, and a humidity sensing element 400. When the cable joint is in use, the housing 100 can be installed at the end of the cable 110 to achieve the configuration of the cable joint at the end of the cable 110. The temperature sensor 200 is disposed inside the housing 100 and is used to detect the temperature of the cable 110, so as to facilitate obtaining the temperature condition of the cable 110 in a timely manner, and reduce the probability of reducing the service life of the cable or causing a fire due to excessive temperature during the use of the cable.

[0036] As Figure 1 and Figure 2 shown, preferably, the housing 100 is installed outside the cable 110, and the end of the cable 110 is disposed inside the housing 100. Since the main reason for the temperature rise of the cable joint is the heat generated by the operation of the cable 110, the temperature sensor 200 can be in direct contact with the cable 110 to accurately obtain the temperature at the heat generation position (i.e., the temperature at the highest temperature of the cable joint). Multiple temperature sensors 200 can be provided and can be disposed at multiple relatively high-temperature positions according to the actual structure of the cable joint to avoid the situation where the user cannot obtain the temperature information in a timely manner due to abnormal heat generation at a certain place; the temperature sensor 200 can send the detected temperature data through a configured wireless transmission module, or can also transmit data through a wired connection method, as long as it is ensured that the user can remotely receive the relevant data.

[0037] The microstrip antenna 300 includes an antenna layer 310 and a ground layer 320. The antenna layer 310 and the ground layer 320 are disposed inside the housing 100. The humidity-sensitive element 400 is disposed inside the housing 100 and between the antenna layer 310 and the ground layer 320.

[0038] It should be noted that the microstrip antenna 300 generally includes an antenna layer 310, a dielectric layer, and a ground layer 320 stacked in sequence. The reader emits electromagnetic waves of a specific frequency, and the electromagnetic waves propagate in space and are received by the microstrip antenna 300. After the microstrip antenna 300 receives the electromagnetic waves, an induced current can be generated, and the generated induced current can be stored in an energy storage component (such as a capacitor, etc.), thereby powering the microstrip antenna 300. The microstrip antenna 300 can reflect the electromagnetic waves emitted by the reader that it receives. The reflected electromagnetic wave signal is determined by the resonance frequency of the microstrip antenna 300, and the resonance frequency of the microstrip antenna 300 is determined by the conductivity of the dielectric layer and the distance between the antenna layer 310 and the ground layer 320. The reader can receive the electromagnetic waves reflected by the microstrip antenna 300, and thus obtain the required information based on the received electromagnetic waves. The above structures and implementation methods are all prior art, only used to explain the working principle of the microstrip antenna 300, not limited, and will not be described in detail here.

[0039] In this embodiment, since the humidity-sensitive element 400 is disposed between the antenna layer 310 and the ground layer 320, that is, the humidity-sensitive element 400 is equivalent to the dielectric layer of the microstrip antenna 300. Therefore, when water enters the inside of the housing 100 or the humidity is too high, the conductivity of the humidity-sensitive element 400 changes, or the shape of the humidity-sensitive element 400 changes (expands or shrinks), which will cause the distance between the antenna layer 310 and the ground layer 320 to change, and then the resonance frequency of the microstrip antenna 300 can be changed. Based on this, it is possible to understand the water ingress situation of the cable joint according to the change in the resonance frequency of the microstrip antenna 300. It should be noted here that as an electrical component, the temperature information detected by the temperature sensor 200 in the cable joint and the resonance frequency of the microstrip antenna 300 can be transmitted to the receiving device by wired or wireless means or the like. The receiving device includes but is not limited to data collection devices such as computers and servers that can perform data processing.

[0040] In some embodiments, multiple humidity-sensitive elements 400 can also be provided. The multiple humidity-sensitive elements 400 are respectively disposed at positions where the housing 100 is prone to water leakage, such as the connection between different split structures of the split-structured housing 100, the connection between the housing 100 and the cable 110, etc., and can timely know whether the housing 100 has a water leakage situation.

[0041] When this cable joint is in use, it is set at the connection of cable 110. The temperature sensor 200 detects the temperatures of the outer shell 100 and the cable 110 and transmits them to the data collection device in real time, so that the user can obtain the temperature information from the data collection device in real time and timely judge whether there is a problem of overheating of this cable joint. When water enters the outer shell 100, the humidity-sensitive element 400 comes into contact with the liquid, and its own conductivity or shape changes, causing the resonance frequency of the microstrip antenna 300 to change. The user can receive an abnormal signal, and then can timely judge whether there is a water leakage situation.

[0042] Through the above settings, it is possible to detect whether there is overheating and water ingress of this cable joint at a relatively far position. That is, when this cable joint is installed in a difficult-to-detect position (such as underwater, inside a wall, etc.), it is also possible to detect whether there is an abnormality in this cable joint and perform maintenance in a timely manner according to the detection situation.

[0043] In addition, a dielectric layer needs to be provided between the antenna layer 310 and the ground layer 320 to isolate the antenna layer 310 and the ground layer 320 and provide support for the antenna layer 310 and the ground layer 320. In some embodiments, the dielectric layer can be selected as a sponge, that is, a sponge is provided between the antenna layer 310 and the ground layer 320. On the one hand, it can separate the antenna layer 310 and the ground layer 320 to realize the information transmission function of the microstrip antenna 300. On the other hand, the sponge is easy to deform, can more conveniently adjust the distance between the antenna layer 310 and the ground layer 320, and the sponge cannot be completely compressed, which can ensure that the antenna layer 310 and the ground layer 320 cannot come into contact to ensure the stable operation of the microstrip antenna 300.

[0044] In some of these embodiments, the humidity-sensitive element 400 includes a humidity-sensitive pad 410, and the humidity-sensitive pad 410 is clamped between the antenna layer 310 and the ground layer 320.

[0045] As Figure 2 shown, preferably, the humidity-sensitive pad 410 is in a plate-like structure, and the two opposite sides of the humidity-sensitive pad 410 are respectively attached to the antenna layer 310 and the ground layer 320. At this time, the humidity-sensitive pad 410 is equivalent to the dielectric layer of the microstrip antenna 300. When the humidity-sensitive pad 410 comes into contact with the liquid or the humidity in the outer shell 100 is relatively high, the conductivity of the humidity-sensitive pad 410 changes, thereby causing the resonance frequency of the microstrip antenna 300 to change, which is convenient for the user to know that there is water ingress in this cable joint.

[0046] In some of these embodiments, the cable joint further includes an elastic element 500. The elastic element 500 is disposed inside the outer shell 100 and is connected to the outer shell 100 or the cable 110. When relative displacement occurs between the outer shell 100 and the cable 110, the elastic element 500 pushes the antenna layer 310 or the ground layer 320, causing the distance between the antenna layer 310 and the ground layer 320 to change.

[0047] As Figure 1 and Figure 2 shown, preferably, the elastic element 500 can be connected to the outer shell 100 and move with the outer shell 100, and is also connected to the cable 110 and move with the cable 110. If the connection between the outer shell 100 and the cable 110 becomes loose or disengaged, the outer shell 100 and the cable 110 will have relative displacement compared to the normal connection state. The elastic element 500 can push the antenna layer 310 or the ground layer 320, causing the antenna layer 310 and the ground layer 320 to approach or move away from each other, thereby changing the resonance frequency of the microstrip antenna 300. The user can determine whether the cable joint has a loose connection based on the abnormal signal received, and the detection accuracy is relatively high. In addition, the elastic ring 510 has elasticity and is not likely to damage the antenna layer 310 or the ground layer 320 during the process of pushing the antenna layer 310 or the ground layer 320.

[0048] In some of these embodiments, the elastic element 500 includes an elastic ring 510. The elastic ring 510 is sleeved on the outer periphery of the cable 110 and moves with the cable 110. The elastic ring 510 is in contact with the antenna layer 310 or the ground layer 320 and is used to squeeze the antenna layer 310 or the ground layer 320.

[0049] Preferably, the elastic ring 510 abuts against the side of the antenna layer 310 away from the ground layer 320, or abuts against the side of the ground layer 320 away from the antenna layer 310. With this arrangement, when the elastic ring 510 moves towards the antenna layer 310 and the ground layer 320, it will squeeze the antenna layer 310 or the ground layer 320 in contact with it, which can effectively improve the detection sensitivity. As Figure 1 and Figure 2 shown, when the cable 110 loosens in the direction away from the outer shell 100, the elastic ring 510 moves with the cable 110 and squeezes the ground layer 320. The distance between the ground layer 320 and the antenna layer 310 is shortened, causing the resonance frequency of the microstrip antenna 300 to change. The accuracy of detecting the looseness of the cable 110 is relatively high. The user can learn that the connection of the cable 110 is loose based on the signal abnormality, so as to facilitate timely maintenance.

[0050] In addition, an elastic ring 510 is provided at a position near the end of the outer shell 100. Due to its elasticity, the elastic ring 510 can fit against the outer wall of the cable 110, providing good sealing performance. In the event of water ingress, the elastic ring 510 can, to a certain extent, prevent liquid from seeping into the interior of the outer shell 100 through the gap between the elastic ring 510 and the cable 110, protecting the internal structure of the outer shell 100 to a certain extent and providing a certain response time for the maintenance of this cable joint.

[0051] In some embodiments, the cable joint further includes a collar 600. The collar 600 is disposed inside the outer shell 100 and sleeved on the outer periphery of the elastic element 500 and / or the cable 110, and the outer wall of the collar 600 is in contact with the outer shell 100.

[0052] As Figure 2 shown, preferably, an installation groove is formed inside the outer shell 100. The microstrip antenna 300, the humidity-sensitive element 400, and the elastic element 500 are all disposed in the installation groove. The elastic element 500 is sleeved on the outer periphery of the cable 110, and the collar 600 is sleeved on the outer periphery of the elastic element 500. The collar 600 applies pressure to the elastic element 500, causing the inner side wall of the elastic element 500 to fit against the cable 110, the inner side wall of the collar 600 to fit against the outer side wall of the elastic element 500, and the outer side wall of the collar 600 to fit against the bottom wall of the installation groove. Through the above structure, the sealing performance at the installation groove is greatly improved, and a small amount of liquid can be prevented from entering the interior of the outer shell 100.

[0053] In some embodiments, the cable joint further includes a sealing ring 700. The sealing ring 700 is disposed at the contact position between the outer surface of the outer shell 100 and the cable 110. The sealing ring 700 is sleeved on the outer periphery of the cable 110, and the outer wall of the sealing ring 700 is in contact with the outer shell 100.

[0054] Due to the certain elasticity of the external material of the cable 110, the sealing performance at the connection between the outer shell 100 and the cable 110 is relatively low due to the influence of the deformation of the cable 110. As Figure 1 and Figure 2 shown, preferably, the sealing ring 700 is disposed at the contact position between the outer surface of the outer shell 100 and the cable 110. The sealing ring 700 has a certain elasticity to squeeze the cable 110, causing the inner side wall of the sealing ring 700 to closely fit against the outer wall of the cable 110, and the outer side wall of the sealing ring 700 to fit against the inner side wall of the outer shell 100, effectively improving the sealing performance at the connection between the outer shell 100 and the cable 110 and preventing water leakage due to insufficient sealing.

[0055] In some embodiments, the temperature sensor 200 is electrically connected to the microstrip antenna 300, and the microstrip antenna 300 is used to transmit the data detected by the temperature sensor 200.

[0056] Preferably, the microstrip antenna 300 may also be provided with a signal processing module (not shown in the figure). The data detected by the temperature sensor 200 is transmitted to the signal processing module for processing, and after processing, it is sent out through the antenna layer 310, so as to facilitate the user to receive the detection data of the temperature sensor 200. Through the above settings, the temperature information and the information of whether there is water ingress of the cable joint can be sent simultaneously through the microstrip antenna 300, without the need to additionally set a sending device (such as the aforementioned wireless transmission module and wired connection) for sending the data of the temperature sensor 200, effectively simplifying the device structure, reducing the volume, and facilitating installation.

[0057] In some embodiments, the housing 100 includes a housing body 120 and a cover body 130. The housing body 120 is installed at the end of the cable 110, and an installation opening is formed on the surface of the housing body 120. The temperature sensor 200 is detachably disposed at the installation opening along with the cover body 130; the microstrip antenna 300 and the humidity-sensitive element 400 are both disposed inside the housing body 120.

[0058] As Figure 1 shown, preferably, the temperature sensor 200 can cooperate with the cover body 130 and be disposed at the installation opening along with the cover body 130. When the cover body 130 covers the installation opening, the temperature sensor 200 is disposed at a specified position inside the housing body 120. Through the above settings, it is convenient to install and repair the temperature sensor 200. Further, the cover body 130 and the housing body 120 need to be hermetically connected to improve the sealing performance of the housing 100.

[0059] In other embodiments, an abnormal detection method applicable to the above cable joint is further provided. The abnormal detection method includes the following steps:

[0060] As Figure 3 shown, step S102, obtain the resonance frequency of the microstrip antenna 300.

[0061] Step S104, determine whether the resonance frequency exceeds a preset range. When the resonance frequency exceeds the preset range, it is determined that the cable joint is abnormal.

[0062] Since the variation amplitude of the resonance frequency of the microstrip antenna 300 is related to the change degree of the conductivity or shape of the humidity-sensitive element 400, and the change degree of the humidity-sensitive element 400 is related to the water inflow amount, when water inflow occurs, the resonance frequency of the microstrip antenna 300 will vary within a certain range. Preferably, first make the cable joint in a normal state, that is, no water leakage occurs, enable the microstrip antenna 300, and obtain and record the resonance frequency of the microstrip antenna 300 at this time. During the use of this cable joint, receive the signal processed by the microstrip antenna 300, and judge whether the resonance frequency of the microstrip antenna 300 changes. When the resonance frequency of the microstrip antenna 300 changes compared with the recorded value, it indicates that water has entered this cable joint. If the change value of the resonance frequency exceeds the preset range, the water inflow situation is more serious, and it can be judged that there is an abnormal situation with this cable joint.

[0063] Through the above method, the abnormal situation of this cable joint can be judged quickly, and the operation is simple.

[0064] For the sake of easy understanding, taking the resonance frequency value of the microstrip antenna 300 as 2.45 GHz when there is no water leakage in this cable joint and the cable 110 is not loose as an example, set the resonance frequency of the microstrip antenna 300 within 2.4 GHz - 2.5 GHz as the normal value. When water enters this cable joint, the conductivity of the humidity-sensitive element 400 changes, resulting in the detected resonance frequency of the microstrip antenna 300 decreasing to 2.39 GHz. By monitoring this change through the receiving device, the system can issue a water inflow alarm.

[0065] Similarly, if the cable 110 is loose, the resonance frequency of the microstrip antenna 300 shifts from 2.45 GHz to 2.51 GHz. By monitoring this change, the system can issue an alarm that the cable 110 is loose. Through the above detection method, it can be judged whether there is water leakage or the cable 110 is loose, and the severity of the water leakage or the cable 110 being loose can be understood according to the numerical value, so as to perform maintenance in a timely manner.

[0066] Furthermore, this cable joint receives the signal of the microstrip antenna 300 through a receiving module (not shown in the figure). In some of these embodiments, in the step of obtaining the resonance frequency of the microstrip antenna 300, the receiving module obtains the resonance frequency of the microstrip antenna 300 at a preset moment or in real time;

[0067] Or, in the step of obtaining the resonance frequency of the microstrip antenna 300, when the receiving module receives a detection instruction, the receiving module obtains the resonance frequency of the microstrip antenna 300 according to the detection instruction.

[0068] Preferably, the receiving module can receive the signal of the microstrip antenna 300 at a predetermined time, such as every 5 minutes or 10 minutes, to reduce the required energy. It can also be set to receive the signal of the microstrip antenna 300 in real time, which can be used by the operator to observe the abnormal situation of the cable joint in real time, facilitating timely discovery and repair. It can also be manually operated by the user, and the receiving module issues a corresponding instruction, and the microstrip antenna 300 responds with the detection information at the current moment, improving the flexibility of detection.

[0069] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0070] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A cable connector, characterized in that: include: A housing capable of being mounted on an end of the cable; A temperature sensor is disposed inside the housing and is used to detect the temperature of the cable; A microstrip antenna, comprising an antenna layer and a ground layer, wherein the antenna layer and the ground layer are arranged inside the housing; The humidity sensitive element is arranged inside the shell and between the antenna layer and the ground layer.

2. The cable connector according to claim 1, characterized in that: The humidity sensitive element comprises a humidity sensitive pad, and the humidity sensitive pad is sandwiched between the antenna layer and the ground layer.

3. The cable connector according to claim 1, characterized in that: It also includes an elastic element, which is arranged inside the shell and connected to the shell or the cable. When the shell and the cable are relatively displaced, the elastic element pushes the antenna layer or the ground layer, so that the distance between the antenna layer and the ground layer changes.

4. The cable connector according to claim 3, characterized in that: The elastic element comprises an elastic ring, which is sleeved on the outer circumference of the cable and moves with the cable. The elastic ring contacts the antenna layer or the ground layer and is used to press the antenna layer or the ground layer.

5. The cable connector according to claim 3, characterized in that: It also includes a ring, which is arranged inside the shell and sleeved on the outer circumference of the elastic element and / or the cable, and the outer wall of the ring is in contact with the shell.

6. The cable connector according to claim 1, characterized in that: It also includes a sealing ring, which is arranged at the contact point between the outer surface of the shell and the cable, the sealing ring is sleeved on the outer circumference of the cable, and the outer wall of the sealing ring is in contact with the shell.

7. The cable connector according to claim 1, characterized in that: The temperature sensor is electrically connected to the microstrip antenna, and the microstrip antenna is used to send data detected by the temperature sensor.

8. The cable connector according to claim 1, characterized in that: The shell includes a shell and a cover. The shell is installed at the end of the cable. A mounting opening is opened on the surface of the shell. The temperature sensor is detachably arranged at the mounting opening along with the cover. The microstrip antenna and the humidity sensitive element are both arranged inside the shell.

9. A method for detecting an abnormality of a cable joint applicable to any one of claims 1 to 8, characterized in that: The anomaly detection method comprises the following steps: Obtaining the resonant frequency of the microstrip antenna; It is determined whether the resonance frequency exceeds a preset range. When the resonance frequency exceeds the preset range, it is determined that the cable connector is abnormal.

10. The cable joint abnormality detection method according to claim 9, wherein the signal of the microstrip antenna is received by a receiving module, characterized in that: In the step of obtaining the resonant frequency of the microstrip antenna, the receiving module obtains the resonant frequency of the microstrip antenna at a preset time or in real time; Alternatively, in the step of acquiring the resonant frequency of the microstrip antenna, when the receiving module receives the detection instruction, the receiving module acquires the resonant frequency of the microstrip antenna according to the detection instruction.

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