Cable icing monitoring equipment

Abstract

The invention is suitable for the technical field of cable detection, and discloses cable icing monitoring equipment, which comprises a fixed frame and a monitoring assembly. The fixing frame comprises a first side plate, a second side plate and a first annular connecting plate, the first side plate and the second side plate are oppositely arranged, the first annular connecting plate is connected between the first side plate and the second side plate, and a containing cavity is defined by the first annular connecting plate, the first side plate and the second side plate. The first side plate is provided with a first through hole, the second side plate is provided with a second through hole, and the first through hole and the second through hole are both communicated with the containing cavity and used for a cable to penetrate through. The first annular connecting plate is provided with an inlet and outlet communicating with the containing cavity, and the inlet and outlet are used for allowing the icing forming matrix to enter the containing cavity. The monitoring assembly is connected to the side, facing the containing cavity, of the first annular connecting plate and comprises a monitoring device based on a friction nanometer generator, and the monitoring device is used for monitoring the thickness of an ice layer attached to the cable. The monitoring equipment provided by the invention can monitor the icing thickness of the cable, provides early warning for cable abnormity, and ensures the safety and reliability of cable power transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a cable ice coating monitoring device. Background Art

[0002] With the rapid development of the power Internet of Things, a large number of sensor monitoring nodes are distributed in various links of the power system, which monitor the operating status of power equipment and surrounding environmental parameters in real time to ensure the safe and stable operation of the equipment.

[0003] Steel-core aluminum stranded wire (i.e. cable), one of the main load-bearing components of power transmission lines, is exposed to the air for a long time. It is inevitable that ice will appear after being exposed to the wind and the sun. Especially in winter, the cable is easily frozen due to the temperature and humidity. This will bury hidden dangers for the normal operation of the power transmission line, affect the safe operation of the transmission line, and further threaten the reliability of power communication. Therefore, there is an urgent need for a cable ice monitoring device to monitor the ice coverage of the cable. Summary of the invention

[0004] The present invention provides a cable ice-coating monitoring device, aiming to solve the technical problem of potential safety hazards caused by ice coating on the cable surface.

[0005] According to a first aspect of the present invention, an embodiment provides a cable ice monitoring device, including:

[0006] A fixing frame, used to be sleeved on the periphery of the cable; the fixing frame includes a first side plate, a second side plate and a first annular connecting plate, the first side plate and the second side plate are arranged opposite to each other, the first annular connecting plate is connected between the first side plate and the second side plate, and is enclosed with the first side plate and the second side plate to form an accommodating cavity; the first side plate is penetrated by a first through hole, the second side plate is penetrated by a second through hole, the first through hole and the second through hole are both connected to the accommodating cavity, and are both used for the cable to pass through, so that the cable is penetrated in the accommodating cavity; the first annular connecting plate is penetrated by an entrance and exit connected to the accommodating cavity, and the entrance and exit are used for the ice-forming matrix to enter the accommodating cavity;

[0007] A monitoring component is connected to the side of the first annular connecting plate facing the accommodating cavity, and the monitoring component includes a monitoring device based on a friction nanogenerator, and the monitoring device is used to monitor the thickness of the ice layer attached to the cable.

[0008] In one embodiment, the monitoring assembly further includes a pressure plate and an elastic connecting member;

[0009] The pressure plate is used to abut against the ice, one end of the elastic connector is connected to the pressure plate, and the other end is connected to the monitoring device, and the monitoring device is connected to the side of the first annular connecting plate facing the accommodating cavity, and is used to monitor the thickness of the ice according to the pressure.

[0010] In one embodiment, the monitoring device includes a pressure sensing unit based on a friction nanogenerator and an auxiliary control unit;

[0011] The pressure sensing unit is used to monitor the thickness of the ice layer attached to the cable to generate a monitoring signal. The auxiliary control unit is electrically connected to the pressure sensing unit to process the monitoring signal.

[0012] In one embodiment, there are multiple monitoring components, and at least two monitoring components are arranged at intervals along the circumference of the first annular connecting plate.

[0013] In one embodiment, at least two monitoring components are arranged at equal intervals along the circumference of the first annular connecting plate; and / or,

[0014] At least four monitoring components are arranged at intervals along the circumference of the first annular connecting plate.

[0015] In one embodiment, at least two monitoring components are arranged at intervals along a direction parallel to the axial direction of the first annular connecting plate.

[0016] In one embodiment, in the circumferential direction of the first annular connecting plate, the inlet and outlet are correspondingly provided between any two adjacent monitoring components.

[0017] In one embodiment, the fixing frame further includes a second annular connecting plate, which is disposed in the accommodating cavity and connected between the first side plate and the second side plate;

[0018] The second annular connecting plate divides the accommodating cavity into a first cavity and a second cavity, the first cavity is arranged around the circumference of the second cavity, the inlet and outlet are connected to the first cavity, the first through hole and the second through hole are both connected to the second cavity, and the second cavity is used for the cable to pass through;

[0019] The cable ice monitoring device also includes a micro-temperature difference power generation device, which is connected to the side of the second annular connecting plate facing the first cavity. The micro-temperature difference power generation device is used to convert heat energy from the cable into electrical energy and power the monitoring device; the side of the micro-temperature difference power generation device facing the first cavity is used to attach an ice layer.

[0020] In one embodiment, the first cavity, the second cavity, the first through-hole and the second through-hole are coaxially arranged; and / or,

[0021] The cross section of the second annular connecting plate is circular.

[0022] In one embodiment, the micro thermoelectric power generation device includes a silica gel layer, a PI / Cu substrate layer deposited on the silica gel layer, and a plurality of P-type micro thermoelectric arms and N-type micro thermoelectric arms arranged in an array and deposited on the PI / Cu substrate layer;

[0023] The silicone layer is arranged on the side of the second annular connecting plate facing the first cavity; the P-type micro-thermoelectric arm is a Bi2Te3-based thermoelectric material doped with Te elements, and the N-type micro-thermoelectric arm is a Bi2Te3-based thermoelectric material doped with Se elements.

[0024] According to the cable ice monitoring device of the above embodiment, a fixing frame is provided, the monitoring component is installed on the fixing frame, and the fixing frame is sleeved on the outer periphery of the cable, so that the monitoring component is installed on the cable. The monitoring component is provided to include a monitoring device based on a friction nanogenerator, and the monitoring device is used to monitor the thickness of the ice layer attached to the cable, so that the monitoring device of the present invention can monitor the ice thickness of the cable, provide an early warning for the abnormality of the cable, and help the staff to further inspect and maintain the cable to ensure the safety and reliability of the cable power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 is a state diagram of a cable ice monitoring device provided by an embodiment of the present invention installed on a cable;

[0027] Figure 2 It is a structural schematic diagram of a cable ice monitoring device provided by an embodiment of the present invention from one perspective;

[0028] Figure 3 is a front view of a cable ice monitoring device provided by an embodiment of the present invention;

[0029] Figure 4 yes Figure 3 Sectional view along line AA;

[0030] Figure 5is a schematic structural diagram of a fixing frame provided by an embodiment of the present invention;

[0031] Figure 6 is a structural block diagram of a monitoring device provided by an embodiment of the present invention;

[0032] Figure 7 It is a schematic structural diagram of a micro temperature difference power generation device provided in an embodiment of the present invention.

[0033] Description of Figure Numbers:

[0034] 100. Cable ice monitoring equipment; 10. Fixing frame; 11. First side plate; 12. Second side plate; 13. First annular connecting plate; 14. Second annular connecting plate; 15. Accommodating cavity; 151. First cavity; 152. Second cavity; 16. First perforation; 17. Second perforation; 18. Entrance and exit; 20. Monitoring component; 21. Monitoring device; 211. Pressure sensing unit; 212. Auxiliary control unit; 22. Pressure plate; 23. Elastic connector; 30. Micro temperature difference power generation device; 31. Silicone layer; 32. PI / Cu substrate layer; 33. P-type micro thermoelectric arm; 34. N-type micro thermoelectric arm; 200. Cable.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0039] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] Since the cables are exposed to the air for a long time, when the temperature is low or in cold areas, the outside of the cables is easily frozen by the cold, resulting in ice covering, which poses a hidden danger to the normal operation of the cables and affects the safe operation of the power transmission lines.

[0041] In view of this, the present invention provides a cable ice coating monitoring device for monitoring cable ice coating conditions, thereby improving the safety and reliability of cable power transmission.

[0042] like Figure 1 As shown, the cable ice monitoring device 100 provided in the embodiment of the present invention includes a fixing frame 10 and a monitoring component 20. The monitoring component 20 is installed on the fixing frame 10. The fixing frame 10 is used to be sleeved on the periphery of the cable 200 and installed on the cable 200. The monitoring component 20 is used to monitor the thickness of ice on the cable 200.

[0043] See also Figure 1 , Figure 2 and Figure 5 The fixing frame 10 includes a first side plate 11, a second side plate 12 and a first annular connecting plate 13. The first side plate 11 and the second side plate 12 are arranged opposite to each other. The first annular connecting plate 13 is connected between the first side plate 11 and the second side plate 12, and is enclosed with the first side plate 11 and the second side plate 12 to form a receiving chamber 15. The first side plate 11 is penetrated with a first through hole 16, and the second side plate 12 is penetrated with a second through hole 17. The first through hole 16 and the second through hole 17 are both connected to the receiving chamber 15, and are both used for the cable 200 to pass through, so that the cable 200 is penetrated in the receiving chamber 15. The first annular connecting plate 13 is penetrated with an entrance and exit 18 connected to the receiving chamber 15, and the entrance and exit 18 is used for the ice-forming matrix to enter the receiving chamber 15. The monitoring component 20 is connected to the side of the first annular connecting plate 13 facing the receiving chamber 15.

[0044] When in use, the fixing frame 10 is sleeved on the periphery of the cable 200, the cable 200 is inserted into the accommodating cavity 15, the ice-forming matrix passes through the entrance and exit 18 into the accommodating cavity 15, and adheres to the periphery of the cable 200 located in the accommodating cavity 15, gradually forming an ice layer, and the monitoring component 20 is set toward the ice layer to monitor the thickness of the ice.

[0045] By adopting the above technical solution, by setting the cable 200 to pass through the accommodating cavity 15, on the one hand, the fixing frame 10 can be installed on the cable 200, and on the other hand, part of the cable 200 can be located in the accommodating cavity 15. By setting the inlet and outlet 18 on the first annular connecting plate 13, the ice-forming matrix can enter the accommodating cavity 15, and then can be attached to the outer periphery of the cable 200 located in the accommodating cavity 15 to form an ice layer. By connecting the monitoring component 20 to the side of the first annular connecting plate 13 facing the accommodating cavity 15, that is, connected to the inner side of the first annular connecting plate 13, the monitoring component 20 is arranged facing the ice, so that the monitoring component 20 can monitor the thickness of the ice.

[0046] In one embodiment, the monitoring component 20 includes a monitoring device 21 based on a triboelectric nanogenerator (TENG), and the monitoring device 21 is used to monitor the thickness of the ice layer attached to the cable 200. By setting a monitoring device 21 based on a triboelectric nanogenerator to monitor the thickness of the ice on the cable 200, the cable ice monitoring device 100 of the present invention can monitor the thickness of the ice on the cable 200, provide an early warning for the abnormality of the cable 200, and help the staff to further inspect and maintain the cable 200 to ensure the safety and reliability of the power transmission of the cable 200. Of course, in other embodiments, the monitoring component 20 can also use other monitoring devices 21.

[0047] See also Figure 3 and Figure 4 The monitoring assembly 20 further includes a pressure plate 22 and an elastic connector 23. The pressure plate 22 is used to contact the ice, one end of the elastic connector 23 is connected to the pressure plate 22, and the other end is connected to the monitoring device 21. The monitoring device 21 is connected to the side of the first annular connecting plate 13 facing the accommodating cavity 15, and is used to monitor the thickness of the ice according to the pressure.

[0048] In specific implementation, the pressure plate 22 is in contact with the ice. As the thickness of the ice increases, the pressure plate 22 compresses the elastic connector 23 and moves toward the monitoring device 21. The elastic connector 23 is compressed and exerts pressure on the monitoring device 21. The monitoring device 21 monitors the thickness of the ice according to the pressure. Specifically, the monitoring device 21 can sense the change in pressure. Based on Hooke's law, the elastic connector 23 can linearly connect the change in displacement with the change in pressure. In this way, through the continuous conversion of displacement-pressure-voltage, the monitoring device 21 can linearly combine the growth of the ice with the change in its voltage to achieve the monitoring of the thickness of the ice.

[0049] In this embodiment, the pressure plate 22 is a plate-shaped structure, and the side of the pressure plate 22 away from the elastic connector 23 is a plane, that is, the side of the pressure plate 22 abutting against the ice is a plane. In other embodiments, the pressure plate 22 can also be set as an arc structure, and the center of the arc structure is set away from the elastic connector 23, that is, the side of the pressure plate 22 abutting against the ice is a concave surface.

[0050] In one embodiment, the elastic connecting member 23 is a spring. It is understood that in other embodiments, the elastic connecting member 23 may also be other elastic components, such as a spring.

[0051] In one embodiment, see Figure 1 and Figure 6 The monitoring device 21 includes a pressure sensing unit 211 based on a friction nanogenerator and an auxiliary control unit 212. The pressure sensing unit 211 is used to monitor the thickness of the ice layer attached to the cable 200 to generate a monitoring signal, and the auxiliary control unit 212 is electrically connected to the pressure sensing unit 211 for processing the monitoring signal. In a specific implementation, the pressure sensing unit 211 is used to monitor the thickness of the ice coating according to the magnitude of the pressure. The cable ice coating monitoring device 100 also includes a processor, and the auxiliary control unit 212 sends the processed monitoring signal to the processor to realize real-time monitoring of the ice coating thickness of the cable 200.

[0052] In one embodiment, the pressure sensing unit 211 based on the friction nanogenerator operates in a contact-separation mode, which allows for more direct and efficient pressure transmission.

[0053] In one embodiment, the monitoring device 21 is bonded to the side of the first annular connecting plate 13 facing the accommodating chamber 15. Of course, in other embodiments, the monitoring device 21 can also be connected to the side of the first annular connecting plate 13 facing the accommodating chamber 15 in other ways.

[0054] In one embodiment, there are multiple monitoring components 20, and at least two monitoring components 20 are arranged at intervals along the circumference of the first annular connecting plate 13. Since the first annular connecting plate 13 is arranged around the circumference of the cable 200 located in the accommodating cavity 15, at least two monitoring components 20 are arranged at intervals along the circumference of the first annular connecting plate 13, that is, at least two monitoring components 20 are arranged at intervals along the circumference of the cable 200 located in the accommodating cavity 15. The ice thickness at different circumferential parts of the cable 200 may be different. By arranging at least two monitoring components 20 at intervals along the circumference, different circumferential parts of the cable 200 can be monitored to improve the comprehensiveness of the monitoring of the ice thickness. In addition, different circumferential parts of the cable 200 can also be monitored at the same time, thereby improving the monitoring efficiency.

[0055] In one embodiment, at least two monitoring components 20 are arranged at equal intervals along the circumference of the first annular connecting plate 13. In this way, the monitoring components 20 arranged circumferentially around the cable 200 can be evenly distributed around the cable 200.

[0056] It can be understood that in other embodiments, the monitoring components 20 around the circumference of the cable 200 can be arranged at non-equal intervals. Preferably, in the circumference of the cable 200, the spacing of the monitoring components 20 arranged below the first annular connecting plate 13 corresponding to the cable 200 can be smaller than the spacing of the monitoring components 20 arranged above the first annular connecting plate 13 corresponding to the cable 200, so that the number of monitoring components 20 arranged below the first annular connecting plate 13 corresponding to the cable 200 is greater than the number of monitoring components 20 arranged above the first annular connecting plate 13 corresponding to the cable 200. Since an object moves downward under the action of its own gravity, when the ice-forming matrix (for example, water) adheres to the outer periphery of the cable 200, it will flow to the bottom of the cable 200, so the ice thickness below the cable 200 may be greater than the ice thickness above the cable 200. The number of monitoring components 20 arranged below the first annular connecting plate 13 corresponding to the cable 200 is greater than the number of monitoring components 20 arranged above the first annular connecting plate 13 corresponding to the cable 200, which is conducive to monitoring the maximum ice thickness of the cable 200.

[0057] In one embodiment, at least four monitoring components 20 are arranged at intervals along the circumference of the first annular connecting plate 13. The more monitoring components 20 are arranged along the circumference of the first annular connecting plate 13, the more comprehensive the results of the ice thickness of the cable 200 monitored will be. By setting at least four monitoring components 20, it can be ensured that at least four locations on the circumference of the cable 200 are monitored. In this embodiment, four monitoring components 20 are arranged along the circumference of the first annular connecting plate 13, and the four monitoring components 20 are respectively located above, below, on the left and on the right of the cable 200. It can be understood that in other embodiments, it is also possible to set five, six, seven, etc. monitoring components 20 along the circumference of the first annular connecting plate 13, and the number of monitoring components 20 is not limited here.

[0058] In one embodiment, at least two monitoring components 20 are arranged at intervals along a direction parallel to the axial direction of the first annular connecting plate 13, that is, at least two monitoring components 20 are arranged at intervals along the extension direction of the cable 200. By setting at least two monitoring components 20 in the extension direction of the cable 200, the ice thickness of a certain length of the cable 200 can be monitored to improve the comprehensiveness of the ice thickness monitoring of the cable 200. In this embodiment, three monitoring components 20 are provided along the extension direction of the cable 200. It can be understood that in other embodiments, it is also possible to set four, five, six, etc. monitoring components 20 along the extension direction of the cable 200, and the number of monitoring components 20 is not limited here.

[0059] In one embodiment, see Figure 1 and Figure 2 , in the circumferential direction of the first annular connecting plate 13, an entrance and exit 18 is correspondingly provided between any two adjacent monitoring components 20. In this way, in the circumferential direction of the cable 200, the monitoring components 20 and the entrances and exits 18 are arranged alternately, so that it can be ensured that multiple entrances and exits 18 are provided along the circumference of the cable 200, and the distribution of the entrances and exits 18 is more uniform, so that the ice thickness of the cable 200 located in the accommodating cavity 15 is close to the ice thickness of the cable 200 located outside the accommodating cavity 15, thereby ensuring the accuracy of the monitoring results. In this embodiment, four entrances and exits 18 are provided, and each entrance and exit 18 extends from one end of the first annular connecting plate 13 close to the first side plate 11 to one end close to the second side plate 12, and the shape of the entrance and exit 18 is similar to a rectangle.

[0060] See also Figures 1 to 5 , the fixing frame 10 also includes a second annular connecting plate 14, which is arranged in the accommodating cavity 15 and connected between the first side plate 11 and the second side plate 12. The second annular connecting plate 14 divides the accommodating cavity 15 into a first cavity 151 and a second cavity 152. The first cavity 151 is arranged circumferentially around the second cavity 152. The entrance 18 is connected to the first cavity 151, and the first perforation 16 and the second perforation 17 are both connected to the second cavity 152. The second cavity 152 is used for the cable 200 to pass through. By setting the second annular connecting plate 14, the overall structural firmness of the fixing frame 10 is improved. When this technical solution is adopted, the ice-forming matrix enters the first cavity 151 through the entrance 18, adheres to the side of the second annular connecting plate 14 facing the first cavity 151, and forms an ice layer. It can be understood that in other embodiments, it is also possible that the fixing frame 10 is not provided with the second annular connecting plate 14.

[0061] In one embodiment, the first cavity 151, the second cavity 152, the first through hole 16 and the second through hole 17 are all coaxially arranged, and the cross section of the second annular connecting plate 14 is circular. Among them, the cross section of the first annular connecting plate 13 is also circular. The fixing frame 10 is a cylindrical body as a whole, and a circular channel is provided along its axial direction. The fixing frame 10 has a simple structure and is easy to process. In specific implementation, the second annular connecting plate 14 is attached to the outer periphery of the cable 200 on one side facing the second cavity 152 to improve the stability of the mounting frame installed on the cable 200.

[0062] In one embodiment, the fixing frame 10 is made of polylactic acid material. By using polylactic acid material to make the fixing frame 10, the fixing frame 10 can meet the demand of lightweight, thereby reducing the overall weight of the cable ice monitoring device 100, and the polylactic acid material also makes the fixing frame 10 have a certain strength, so as to play a better supporting role for the monitoring component 20.

[0063] See also Figure 1 , Figure 3 , Figure 4 and Figure 6 The cable ice monitoring device 100 also includes a micro-temperature difference power generation device 30, which is connected to the side of the second annular connecting plate 14 facing the first cavity 151. The micro-temperature difference power generation device 30 is used to convert the heat energy from the cable 200 into electrical energy and supply power to the monitoring device 21. The side of the micro-temperature difference power generation device 30 facing the first cavity 151 is used to attach the ice layer. In specific implementation, the micro-temperature difference power generation device 30 supplies power to the auxiliary control unit 212 of the monitoring device 21, so that the cable ice monitoring device 100 can be self-powered. The micro-temperature difference power generation device 30 not only enables the cable ice monitoring device 100 to be self-powered, but also provides the possibility of powering other sensors installed on the cable 200.

[0064] Thermoelectric power generation device is a power generation device that uses the thermocouple principle to directly convert thermal energy into electrical energy. It uses the thermoelectric effect to provide energy for the microsystem to achieve long-term power supply, and has the characteristic that the power density does not change with the length of time. The micro-thermoelectric power generation device 30 can play a significant role in an environment with a stable temperature difference. During the power transmission process, the cable 200 will generate heat inside. The micro-thermoelectric power generation device 30 can use the temperature difference between the inside and outside of the cable 200 to generate electricity, thereby powering the auxiliary control unit 212 of the monitoring device 21, and also realize the possibility of powering other sensors installed on the cable 200.

[0065] It is understandable that in other embodiments, the cable ice monitoring device 100 may not be provided with the micro temperature difference power generation device 30. When this technical solution is adopted, other power supply devices may be used to power the auxiliary control unit 212.

[0066] See also Figure 1 , Figure 4 and Figure 7 The micro thermoelectric power generation device 30 includes a silicone layer 31, a PI / Cu substrate layer 32 deposited on the silicone layer 31, and a plurality of P-type micro thermoelectric arms 33 and N-type micro thermoelectric arms 34 deposited on the PI / Cu substrate layer 32 and arranged in an array. The silicone layer 31 is disposed on the side of the second annular connecting plate 14 facing the first cavity 151. Silicone has good thermal conductivity. By providing the silicone layer 31 on the micro thermoelectric power generation device 30, it is beneficial to conduct the temperature of the cable 200 itself to the hot end of the micro thermoelectric power generation device 30.

[0067] In one embodiment, the P-type micro-thermoelectric arm 33 is a thermoelectric material doped with Te element in Bi2Te3, and the N-type micro-thermoelectric arm 34 is a thermoelectric material doped with Se element in Bi2Te3. Bi2Te3 usually introduces alloying elements such as Sb and Se to adjust the band structure and reduce thermal conductivity. For P-type materials, Sb is generally used to replace part of Bi to form a (Bi, Sb)2Te3 alloy. In the (Bi, Sb)2Te3 alloy, since the introduced Sb has a stronger ability to form anti-site defects than Bi, and for different preparation processes, the hole concentration formed by the anti-site defects of Sb and Bi replacing Te is different, but the hole concentration is usually too high. Therefore, an excess of Te is added to the formula to suppress anti-site defects, reduce the acceptor doping concentration, and thus reduce the hole concentration. For N-type materials, Se is used as a donor doping to suppress anti-site defects, reduce the acceptor doping concentration, and thus reduce the hole concentration.

[0068] In one embodiment, the silicone layer 31 may be adhered to the second annular connecting plate 14. Of course, in a specific application, the silicone layer 31 may also be connected to the second annular connecting plate 14 in other ways.

[0069] After the cable ice monitoring device 100 of the present invention is sleeved on the cable 200, the ice formation matrix enters the first cavity 151 from the entrance 18, and an ice layer is formed on the side of the micro-temperature difference power generation device 30 facing the first cavity 151. As the ice thickness increases, the pressing plate 22 moves toward the side close to the monitoring device 21, and the elastic connector 23 is compressed, which generates pressure on the monitoring device 21. The pressure sensing unit 211 based on the friction nanogenerator of the monitoring device 21 monitors the thickness of the ice according to the pressure, and transmits the monitoring signal to the auxiliary control unit 212 of the monitoring device 21. The auxiliary control unit 212 processes the monitoring signal and transmits it to the processor, thereby realizing real-time monitoring of the ice thickness of the cable 200. Among them, the micro-temperature difference power generation device 30 can power the auxiliary control unit 212. In addition, multiple monitoring components 20 are arranged in the circumferential direction and extension direction of the cable 200, so that multiple parts of the cable can be monitored at the same time, improving the monitoring efficiency.

[0070] The cable ice monitoring device 100 of the present invention can monitor the ice thickness of the cable 200, provide early warning for abnormalities of the cable 200, and help the staff to further inspect and maintain the cable 200 to ensure the safety and reliability of power transmission of the cable 200. In addition, the cable ice monitoring device 100 can also be self-powered, which greatly improves the convenience of use compared to the technical solution of equipping a special device for power supply.

[0071] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cable ice monitoring device, characterized in that: include: A fixing frame, used to be sleeved on the periphery of the cable; the fixing frame includes a first side plate, a second side plate and a first annular connecting plate, the first side plate and the second side plate are arranged opposite to each other, the first annular connecting plate is connected between the first side plate and the second side plate, and is enclosed with the first side plate and the second side plate to form an accommodating cavity; the first side plate is penetrated by a first through hole, the second side plate is penetrated by a second through hole, the first through hole and the second through hole are both connected to the accommodating cavity, and are both used for the cable to pass through, so that the cable is penetrated in the accommodating cavity; the first annular connecting plate is penetrated by an entrance and exit connected to the accommodating cavity, and the entrance and exit are used for the ice-forming matrix to enter the accommodating cavity; A monitoring component is connected to the side of the first annular connecting plate facing the accommodating cavity, and the monitoring component includes a monitoring device based on a friction nanogenerator, and the monitoring device is used to monitor the thickness of the ice layer attached to the cable.

2. The cable ice monitoring device according to claim 1, characterized in that: The monitoring assembly also includes a pressure plate and an elastic connecting piece; The pressure plate is used to abut against the ice, one end of the elastic connector is connected to the pressure plate, and the other end is connected to the monitoring device, and the monitoring device is connected to the side of the first annular connecting plate facing the accommodating cavity, and is used to monitor the thickness of the ice according to the pressure.

3. The cable ice monitoring device according to claim 2, characterized in that: The monitoring device includes a pressure sensing unit based on a friction nanogenerator and an auxiliary control unit; The pressure sensing unit is used to monitor the thickness of the ice layer attached to the cable to generate a monitoring signal. The auxiliary control unit is electrically connected to the pressure sensing unit to process the monitoring signal.

4. The cable ice monitoring device according to claim 1, characterized in that: There are multiple monitoring components, and at least two of them are arranged at intervals along the circumference of the first annular connecting plate.

5. The cable ice monitoring device according to claim 4, characterized in that: At least two of the monitoring components are arranged at equal intervals along the circumference of the first annular connecting plate; and / or, At least four monitoring components are arranged at intervals along the circumference of the first annular connecting plate.

6. The cable ice monitoring device according to claim 4, characterized in that: At least two of the monitoring components are arranged at intervals along a direction parallel to the axial direction of the first annular connecting plate.

7. The cable ice monitoring device according to claim 4, characterized in that: In the circumferential direction of the first annular connecting plate, the inlet and outlet are correspondingly arranged between any two adjacent monitoring components.

8. The cable ice monitoring device according to claim 1, characterized in that: The fixing frame further includes a second annular connecting plate, which is disposed in the accommodating cavity and connected between the first side plate and the second side plate; The second annular connecting plate divides the accommodating cavity into a first cavity and a second cavity, the first cavity is arranged around the circumference of the second cavity, the inlet and outlet are connected to the first cavity, the first through hole and the second through hole are both connected to the second cavity, and the second cavity is used for the cable to pass through; The cable ice monitoring device also includes a micro-temperature difference power generation device, which is connected to the side of the second annular connecting plate facing the first cavity. The micro-temperature difference power generation device is used to convert heat energy from the cable into electrical energy and power the monitoring device; the side of the micro-temperature difference power generation device facing the first cavity is used to attach an ice layer.

9. The cable ice monitoring device according to claim 8, characterized in that: The first cavity, the second cavity, the first through-hole and the second through-hole are all coaxially arranged; and / or, The cross section of the second annular connecting plate is circular.

10. The cable ice monitoring device according to claim 8, characterized in that: The micro thermoelectric power generation device comprises a silica gel layer, a PI / Cu substrate layer deposited on the silica gel layer, and a plurality of P-type micro thermoelectric arms and N-type micro thermoelectric arms arranged in an array and deposited on the PI / Cu substrate layer; The silicone layer is arranged on the side of the second annular connecting plate facing the first cavity; the P-type micro-thermoelectric arm is a Bi2Te3-based thermoelectric material doped with Te elements, and the N-type micro-thermoelectric arm is a Bi2Te3-based thermoelectric material doped with Se elements.

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