Degaussing work cable joint temperature on-line monitoring system

Abstract

The utility model relates to a degaussing work cable joint temperature on-line monitoring system, and belongs to the technical field of cable temperature monitoring. The system comprises a surface acoustic wave probe, a surface acoustic wave reading antenna, a Lora transmitting antenna, a Lora receiving antenna, a storage battery and a data collector, a surface acoustic wave probe is installed on the conductor surface of each cable joint to be detected; the surface acoustic wave reading antenna is connected with the surface acoustic wave probe; the surface acoustic wave reading antenna is also connected with the input end of the data acquisition unit through a transmission line; the output end of the data collector is connected with the Lora transmitting antenna through another transmission line; and the Lora transmitting antenna is connected with the Lora receiving antenna. According to the utility model, on-line monitoring of the temperature of a degaussing work cable joint can be realized A worker can utilize the detected temperature of the joint to carry out early warning on the overheating fault of the joint in advance by adopting the existing means, so that operation guidance is provided for electrification of the coil, and the demagnetization operation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of cable temperature monitoring technology, specifically relating to an online monitoring system for the temperature of a demagnetizing cable joint. Background Technology

[0002] Magnetic treatment is an important means of improving the magnetic protection capability of ships. Before magnetic treatment, a large number of working coils are usually wound around the hull of the ship. In order to reduce the workload of winding the cable, the working coils usually use special demagnetizing cables with a small cross-sectional area, but the peak value of their working current will exceed 4000A, which will cause the cable to heat up seriously.

[0003] Practical experience shows that due to the presence of contact resistance, the intermediate joint is often the hot spot of the working coil. Excessive temperature can not only cause the insulation material to age, but may also directly burn out the cable, which will have an adverse effect on the demagnetization operation of the ship. In addition, the time interval between the two current pulse sequences is also related to the cooling time of the working coil. Therefore, designing an online monitoring system for the temperature of the demagnetization working cable joint can not only provide early warning of joint overheating faults, but also provide guidance for the energization of the coil, which is conducive to improving the efficiency of the demagnetization operation. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an online temperature monitoring system for demagnetizing cable joints. This system enables early warning of overheating faults in the joints, provides guidance for energizing the coils, and thus improves the efficiency of demagnetizing operations.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An online temperature monitoring system for demagnetizing cable joints, characterized in that it includes a surface acoustic wave probe, a surface acoustic wave reading antenna, a LoRa transmitting antenna, a LoRa receiving antenna, a battery, and a data acquisition unit;

[0007] Among them, a surface acoustic wave probe is installed on the conductor surface of each cable joint to be tested;

[0008] The surface acoustic wave (SAW) readout antenna is wirelessly connected to the SAW probe.

[0009] The surface acoustic wave readout antenna is also connected to the input terminal of the data acquisition unit via a transmission line;

[0010] The output of the data acquisition unit is connected to the Lora transmitting antenna via another transmission line;

[0011] The Lora transmitting antenna and the Lora receiving antenna are wirelessly connected.

[0012] The battery is connected to the data acquisition unit, the surface acoustic wave readout antenna, and the LoRa transmitting antenna to provide power.

[0013] Furthermore, preferably, one surface acoustic wave (SAW) readout antenna can wirelessly communicate with several SAW probes over a distance of no more than 2m.

[0014] Furthermore, preferably, one data acquisition unit can connect to several surface acoustic wave readout antennas.

[0015] Furthermore, preferably, the surface acoustic wave probe, surface acoustic wave readout antenna, LoRa transmitting antenna, battery, and data acquisition unit are all one or more;

[0016] Lora has one receiving antenna.

[0017] Furthermore, preferably, it also includes a distribution box; the battery, data acquisition unit and LoRa transmitting antenna are all installed inside the distribution box.

[0018] Furthermore, preferably, it also includes a computer, with the LoRa receiving antenna connected to the computer via another transmission line, and the computer is installed in a remote control center.

[0019] Furthermore, preferably, there are multiple distribution boxes, each containing a battery, a data acquisition unit, and a LoRa transmitting antenna.

[0020] In this invention, a surface acoustic wave (SAW) probe is fixedly installed on the conductor surface of a cable joint for measuring conductor temperature. The SAW probe should be small and lightweight, making it easy to fix at the conductor crimping point of the cable joint.

[0021] In this invention, the surface acoustic wave (SAW) reading antenna acquires the conductor temperature information measured by the SAW probe via wireless communication; preferably, the SAW reading antenna is placed near the SAW probe.

[0022] In this invention, the conductor temperature surface acoustic wave reading antenna is connected to the data acquisition device via a transmission line, and the acquired conductor temperature information is transmitted to the data acquisition device.

[0023] In this invention, the data acquisition device is connected to the Lora transmitting antenna via another transmission line. The Lora transmitting antenna is wirelessly connected to the Lora receiving antenna, transmitting the conductor temperature information acquired by the data acquisition device to the Lora transmitting antenna and then sending it to the Lora receiving antenna.

[0024] One of the data acquisition units can connect to several surface acoustic wave (SAW) reading antennas and receive conductor temperature information transmitted by these antennas.

[0025] In this invention, the battery is electrically connected to the data acquisition unit, the surface acoustic wave reading antenna, and the LoRa transmitting antenna, respectively, and is used to provide power to the data acquisition unit, the surface acoustic wave reading antenna, and the LoRa transmitting antenna.

[0026] This invention also includes a computer. The Lora receiving antenna is connected to the computer via another transmission line, and the computer is installed in a remote control center. The Lora transmitting antenna transmits the conductor temperature information of the cable joint to the remote Lora receiving antenna via wireless communication. Finally, the conductor temperature information of the cable joint (i.e., the joint temperature) is transmitted to the computer located in the remote control center via another transmission line, realizing online monitoring of the joint temperature.

[0027] In this invention, the surface acoustic wave reading antenna, data acquisition unit, LoRa transmitting antenna, battery, and power distribution box are preferably all installed on the ship's deck.

[0028] The joint temperature detected by this invention can be used to provide early warning of joint overheating faults and provide operational guidance for energizing the coil. The specific method is as follows: when the joint temperature exceeds the temperature threshold (using existing means to determine whether the joint temperature exceeds the temperature threshold, such as manual judgment), an overheating fault warning is issued, and at the same time, existing means are used to stop energizing the demagnetizing cable (such as manually stopping the energizing). After the cable joint cools down, existing means are used to energize and demagnetize again (such as manually energizing).

[0029] Compared with conventional power cable temperature monitoring, temperature monitoring of demagnetized working cables has the following characteristics:

[0030] 1. The demagnetizing cable is not fixed in one place. Instead, it is temporarily wrapped around the cable and a temporary intermediate joint is made before demagnetization. After demagnetization, the joint and the wrapped cable need to be removed. Therefore, the temperature sensor laid at the joint also needs to be repeatedly installed and removed. The sensor should be small in size and easy to install and remove.

[0031] 2. The demagnetizing current is a short-duration, large-pulse current with a current change rate exceeding 4000A / s, requiring the sensor to have strong electromagnetic compatibility performance.

[0032] Based on this, the sensor of this utility model uses a surface acoustic wave probe.

[0033] Compared with the prior art, the advantages of this utility model are as follows:

[0034] This utility model provides an online temperature monitoring system for demagnetizing cable joints, which has a novel structure, is easy to use, and can realize online temperature monitoring of demagnetizing cable joints;

[0035] Workers can use the detected joint temperature to provide early warning of joint overheating faults using existing methods, and provide operational guidance for energizing the coil, thereby improving the efficiency of demagnetization operations.

[0036] Furthermore, this invention has minimal impact on the insulation structure of cable joints, ensuring high safety. Additionally, different measuring points do not interfere with each other, resulting in high reliability. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of one embodiment of the online temperature monitoring system for demagnetizing cable joints of this utility model;

[0039] Figure 2 This is a schematic diagram of another embodiment of the online temperature monitoring system for demagnetizing cable joints of this utility model;

[0040] Figure 3 This is a schematic diagram of another embodiment of the online temperature monitoring system for demagnetizing cable joints of this utility model;

[0041] The components include: 1. Surface acoustic wave probe; 2. Cable connector; 3. Surface acoustic wave reading antenna; 4. Transmission line; 5. Data acquisition unit; 6. LoRa transmitting antenna; 7. Battery; 8. Distribution box; 9. LoRa receiving antenna; 10. Computer; 11. Ship deck. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the embodiments.

[0043] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of the present invention. Where specific techniques, connections, or conditions are not specified in the embodiments, they are performed in accordance with the techniques, connections, or conditions described in the literature in the field or according to the product instructions. Materials, instruments, or equipment used without specified manufacturers are all conventional products that can be obtained through purchase.

[0044] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0045] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. The terms "inner", "upper", "lower", etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0048] In this embodiment of the utility model, preferably:

[0049] The surface acoustic wave probe 1 is a product of Jiangsu Shengli Sensor Technology Co., Ltd., model W-TSB.

[0050] The surface acoustic wave readout antenna 3 is a product of Jiangsu Shengli Sensor Technology Co., Ltd., model ANT438.

[0051] Data acquisition unit 5 is a product of Jiangsu Shengli Sensor Technology Co., Ltd., model W-TRA;

[0052] The Lora transmitting antenna 6 and Lora receiving antenna 9 are products from Jinan Youren IoT Technology Co., Ltd., model number USR-LG206. Example 1

[0053] like Figure 1 As shown, an online temperature monitoring system for demagnetizing working cable joints includes a surface acoustic wave probe 1, a surface acoustic wave reading antenna 3, a LoRa transmitting antenna 6, a LoRa receiving antenna 9, a battery 7, and a data acquisition unit 5.

[0054] Among them, a surface acoustic wave probe 1 is installed on the conductor surface of each cable joint 2 to be tested;

[0055] The surface acoustic wave reading antenna 3 is wirelessly connected to the surface acoustic wave probe 1;

[0056] The surface acoustic wave readout antenna 3 is also connected to the input terminal of the data acquisition unit 5 via a transmission line 4;

[0057] The output of the data acquisition unit 5 is connected to the Lora transmitting antenna 6 via another transmission line 4;

[0058] Lora transmitting antenna 6 and Lora receiving antenna 9 are wirelessly connected.

[0059] The battery 7 is connected to the data acquisition unit 5, the surface acoustic wave reading antenna 3, and the LoRa transmitting antenna 6 respectively to provide power. Example 2

[0060] like Figure 1 As shown, an online temperature monitoring system for demagnetizing working cable joints includes a surface acoustic wave probe 1, a surface acoustic wave reading antenna 3, a LoRa transmitting antenna 6, a LoRa receiving antenna 9, a battery 7, and a data acquisition unit 5.

[0061] Among them, a surface acoustic wave probe 1 is installed on the conductor surface of each cable joint 2 to be tested;

[0062] The surface acoustic wave reading antenna 3 is wirelessly connected to the surface acoustic wave probe 1;

[0063] The surface acoustic wave readout antenna 3 is also connected to the input terminal of the data acquisition unit 5 via a transmission line 4;

[0064] The output of the data acquisition unit 5 is connected to the Lora transmitting antenna 6 via another transmission line 4;

[0065] Lora transmitting antenna 6 and Lora receiving antenna 9 are wirelessly connected.

[0066] The battery 7 is connected to the data acquisition unit 5, the surface acoustic wave reading antenna 3, and the LoRa transmitting antenna 6 respectively to provide power.

[0067] A single surface acoustic wave (SAW) reading antenna 3 can wirelessly communicate with several SAW probes 1 over a distance not exceeding 2m.

[0068] A data acquisition unit 5 can be connected to several surface acoustic wave readout antennas 3.

[0069] The surface acoustic wave probe 1, surface acoustic wave reading antenna 3, LoRa transmitting antenna 6, storage battery 7, and data acquisition unit 5 are all one or more;

[0070] Lora has one receiving antenna 9. Example 3

[0071] like Figure 2 As shown, an online temperature monitoring system for demagnetizing working cable joints includes a surface acoustic wave probe 1, a surface acoustic wave reading antenna 3, a LoRa transmitting antenna 6, a LoRa receiving antenna 9, a battery 7, and a data acquisition unit 5.

[0072] Among them, a surface acoustic wave probe 1 is installed on the conductor surface of each cable joint 2 to be tested;

[0073] The surface acoustic wave reading antenna 3 is wirelessly connected to the surface acoustic wave probe 1;

[0074] The surface acoustic wave readout antenna 3 is also connected to the input terminal of the data acquisition unit 5 via a transmission line 4;

[0075] The output of the data acquisition unit 5 is connected to the Lora transmitting antenna 6 via another transmission line 4;

[0076] Lora transmitting antenna 6 and Lora receiving antenna 9 are wirelessly connected.

[0077] The battery 7 is connected to the data acquisition unit 5, the surface acoustic wave reading antenna 3, and the LoRa transmitting antenna 6 respectively to provide power.

[0078] A single surface acoustic wave (SAW) reading antenna 3 can wirelessly communicate with several SAW probes 1 over a distance not exceeding 2m.

[0079] A data acquisition unit 5 can be connected to several surface acoustic wave readout antennas 3.

[0080] The surface acoustic wave probe 1, surface acoustic wave reading antenna 3, LoRa transmitting antenna 6, storage battery 7, and data acquisition unit 5 are all one or more;

[0081] Lora has one receiving antenna 9.

[0082] It also includes a distribution box 8; the battery 7, data acquisition unit 5 and LoRa transmitting antenna 6 are all installed in the distribution box 8.

[0083] There are multiple distribution boxes 8, and each distribution box 8 contains a storage battery 7, a data acquisition device 5, and a LoRa transmitting antenna 6. Example 4

[0084] like Figure 3 As shown, an online monitoring system for the temperature of a demagnetizing working cable joint is characterized by comprising a surface acoustic wave probe 1, a surface acoustic wave reading antenna 3, a LoRa transmitting antenna 6, a LoRa receiving antenna 9, a battery 7, and a data acquisition unit 5.

[0085] Among them, a surface acoustic wave probe 1 is installed on the conductor surface of each cable joint 2 to be tested;

[0086] The surface acoustic wave reading antenna 3 is wirelessly connected to the surface acoustic wave probe 1;

[0087] The surface acoustic wave readout antenna 3 is also connected to the input terminal of the data acquisition unit 5 via a transmission line 4;

[0088] The output of the data acquisition unit 5 is connected to the Lora transmitting antenna 6 via another transmission line 4;

[0089] Lora transmitting antenna 6 and Lora receiving antenna 9 are wirelessly connected.

[0090] The battery 7 is connected to the data acquisition unit 5, the surface acoustic wave reading antenna 3, and the LoRa transmitting antenna 6 respectively to provide power.

[0091] A single surface acoustic wave (SAW) reading antenna 3 can wirelessly communicate with several SAW probes 1 over a distance not exceeding 2m.

[0092] A data acquisition unit 5 can be connected to several surface acoustic wave readout antennas 3.

[0093] The surface acoustic wave probe 1, surface acoustic wave reading antenna 3, LoRa transmitting antenna 6, storage battery 7, and data acquisition unit 5 are all one or more;

[0094] Lora has one receiving antenna 9.

[0095] It also includes a distribution box 8; the battery 7, data acquisition unit 5 and LoRa transmitting antenna 6 are all installed in the distribution box 8.

[0096] There are multiple distribution boxes 8, and each distribution box 8 contains a storage battery 7, a data acquisition device 5, and a LoRa transmitting antenna 6.

[0097] It also includes computer 10, and LoRa receiving antenna 9 is connected to computer 10 via another transmission line 4. Computer 10 is installed in a remote control center.

[0098] Application Example 1

[0099] The online monitoring system for the temperature of the demagnetizing cable joint includes 90 surface acoustic wave probes 1, 30 surface acoustic wave reading antennas 3, 10 LoRa transmitting antennas 6 and 1 LoRa receiving antenna 9, 10 batteries 7, 10 data acquisition units 5, 10 distribution boxes 8 and a computer 10.

[0100] The working coil wound on the ship has a total of 90 turns. The cable connector 2 of each coil is placed on the ship's deck surface 11. The distance between two adjacent coils is 1.5m. 90 surface acoustic wave probes 1 are fixedly installed on the conductor surface of 90 cable connectors 2 to measure the conductor temperature.

[0101] The cable connector 2 is divided into 30 groups from bow to stern, with 3 connectors in each group. 30 surface acoustic wave (SAW) reading antennas 3 communicate wirelessly with the SAW probes 1 of the 30 cable connectors respectively. Each SAW reading antenna 3 is connected to 3 SAW probes 1, with the distance controlled within 2m.

[0102] Thirty surface acoustic wave (SAW) reading antennas 3 are each connected to 10 data acquisition units 5 via transmission lines 4. Each data acquisition unit 5 is connected to three SAW reading antennas 3 to upload conductor temperature data to the data acquisition unit 5.

[0103] Ten data acquisition units 5 are connected to ten Lora transmitting antennas 6 via transmission lines 4, and upload conductor temperature data to the corresponding Lora transmitting antennas 6.

[0104] Ten batteries 7 power the ten data acquisition units 5 on the ship and the corresponding surface acoustic wave reading antennas 3 and Lora transmitting antennas 6.

[0105] One storage battery 7, one data acquisition unit 5 and one LoRa transmitting antenna 6 are installed in one distribution box 8, for a total of 10 distribution boxes 8;

[0106] Ten LoRa transmitting antennas 6 transmit information wirelessly to a remote LoRa receiving antenna 9, and finally transmit the conductor temperature information to a computer 10 in a remote control center via a transmission line 4, thus realizing online monitoring of the joint temperature.

[0107] The system proposed in this invention enables online monitoring of the temperature of the demagnetizing cable joint.

[0108] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents. It should be understood that any parts not elaborated in detail in this specification belong to the prior art.

Claims

1. An online temperature monitoring system for demagnetizing cable joints, characterized in that, It includes a surface acoustic wave probe (1), a surface acoustic wave readout antenna (3), a LoRa transmitting antenna (6), a LoRa receiving antenna (9), a battery (7), and a data acquisition unit (5); Among them, a surface acoustic wave probe (1) is installed on the conductor surface of each cable joint (2) to be tested. The surface acoustic wave reading antenna (3) is wirelessly connected to the surface acoustic wave probe (1); The surface acoustic wave readout antenna (3) is also connected to the input terminal of the data acquisition unit (5) via a transmission line (4); The output of the data acquisition unit (5) is connected to the Lora transmitting antenna (6) via another transmission line (4); The Lora transmitting antenna (6) and the Lora receiving antenna (9) are wirelessly connected; The storage battery (7) is connected to the data acquisition unit (5), the surface acoustic wave reading antenna (3), and the Lora transmitting antenna (6) respectively to provide power.

2. The online temperature monitoring system for demagnetizing cable joints according to claim 1, characterized in that, A surface acoustic wave reading antenna (3) can communicate wirelessly with several surface acoustic wave probes (1) over a distance not exceeding 2m.

3. The online temperature monitoring system for demagnetizing cable joints according to claim 1, characterized in that, A data acquisition unit (5) can be connected to several surface acoustic wave readout antennas (3).

4. The online temperature monitoring system for demagnetizing cable joints according to claim 1, characterized in that, The surface acoustic wave probe (1), surface acoustic wave reading antenna (3), LoRa transmitting antenna (6), storage battery (7), and data acquisition unit (5) are all one or more; Lora has one receiving antenna (9).

5. The online temperature monitoring system for demagnetizing cable joints according to claim 1, characterized in that, It also includes a distribution box (8); the battery (7), data acquisition unit (5) and LoRa transmitting antenna (6) are all installed in the distribution box (8).

6. The online temperature monitoring system for demagnetizing cable joints according to claim 1, characterized in that, It also includes a computer (10), and the Lora receiving antenna (9) is connected to the computer (10) via another transmission line (4). The computer (10) is installed in a remote control center.

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