A kind of for high-voltage power equipment multi-parameter surface acoustic wave sensor and read-write terminal

Abstract

The utility model discloses a kind of for high-voltage power equipment multi-parameter surface acoustic wave sensor and read-write terminal, including first unit and second unit;The first unit includes surface acoustic wave sensor, antenna set A;The second unit includes antenna set B, reader-writer;The surface acoustic wave sensor is connected with antenna set A;The antenna set B is connected with reader-writer;Antenna set A and antenna set B respectively include same insulating sheath;The insulating sheath is built-in antenna and radio frequency connector;Insulating sheath bottom also has magnet;Antenna set A and antenna set B can be connected by magnet magnetism between them.The utility model front end surface acoustic wave sensor can complete passive wireless deployment, complete measurement and signal feedback under the condition of supporting antenna transmission signal power supply, realize the function of lightweight deployment, mobile detection also can be online monitoring.

Description

Technical Field

[0001] This utility model relates to the field of surface acoustic wave sensor technology, and in particular to a multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment. Background Technology

[0002] Surface acoustic wave (SAW) sensors, due to their passive, wireless, and strong electromagnetic interference resistance characteristics, have shown great potential in fields such as gas detection, pressure monitoring, and temperature sensing, especially in the condition monitoring of high-voltage electrical equipment (such as GIS equipment filled with SF6 gas). However, applying these sensors to harsh industrial environments, particularly when they need to be immersed in SF6 gas for extended periods for safety monitoring of high-voltage equipment, presents significant challenges.

[0003] Existing technical solutions have several drawbacks in terms of system deployment and long-term operation and maintenance: 1. There are problems with reliable connection and safe isolation between surface acoustic wave (SAW) sensors and external reading / writing devices. Traditional wired connections are not only complex to deploy but also introduce conductive paths, seriously threatening the safe operation of high-voltage insulated equipment and failing to meet the rigid requirements of electrical isolation. Furthermore, how to achieve truly passive wireless signal transmission while ensuring a stable and reliable connection is a key bottleneck hindering its widespread application. 2. Reader-related equipment and SAW sensors typically use fixed connections or complex wireless solutions. Fixed connections limit the mobility of the reader, requiring a dedicated reader for each sensor or group of sensors, resulting in high equipment investment costs. 3. In monitoring scenarios involving high-voltage equipment (such as SF6 insulated equipment), operation and maintenance are extremely sensitive. If the sensor relies on external power or has a hard connection with the reader that is difficult to quickly separate, it is difficult to safely and conveniently remove the reader during equipment inspection or reader maintenance, posing a risk of misoperation or forced interruption of monitoring. 4. For gas monitoring applications, existing technologies often use offline or bypass analysis by taking gas from the equipment's gas valve. This method is not only cumbersome to operate, but also introduces a series of reliability risks, such as: the gas sampling process may contaminate the gas sample being tested; residual contamination in the gas sampling pipeline itself may lead to measurement errors; improper operation may cause SF6 gas leakage, resulting in environmental pollution and personnel poisoning risks; and frequent operation of the gas valve may cause its sealing failure or damage to its self-locking function, seriously affecting the safety of the equipment itself. Utility Model Content

[0004] To address the problems existing in the background technology, the purpose of this utility model is to provide a multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment. The front-end surface acoustic wave sensor can be deployed passively and wirelessly, and can complete measurement and signal feedback when powered by a matching antenna transmitting a signal, thus achieving lightweight deployment, mobile detection, and online monitoring functions.

[0005] To achieve the above objectives, the present invention aims to provide a multi-parameter surface acoustic wave (SAW) sensor and reader / writer terminal for high-voltage power equipment, comprising a first unit and a second unit; the first unit includes a SAW sensor and an antenna assembly A; the second unit includes an antenna assembly B and a reader / writer; the SAW sensor is connected to the antenna assembly A; the antenna assembly B is connected to the reader / writer; antenna assembly A and antenna assembly B each include the same insulating sheath; the insulating sheath houses an antenna and an RF connector; the bottom of the insulating sheath also has a magnet; antenna assembly A and antenna assembly B can be magnetically connected via the magnet; the reader / writer includes an RF transmitter, an RF receiver, and a UHF partial discharge signal acquisition terminal; the reader / writer also includes an RF source, a power divider, a directional coupler, an amplitude and phase detector, a UHF dedicated RF detector, a microprocessor, an ADC module, a display, and a communication module; the RF transmitter, RF receiver, UHF partial discharge signal acquisition terminal, RF source, power divider, directional coupler, amplitude and phase detector, UHF dedicated RF detector, ADC module, display, and communication module are respectively connected to the microprocessor.

[0006] Furthermore, the surface acoustic wave sensor is connected to the antenna assembly A via an RF connector; the RF connector is one or more of SMA, IPEX, and BNC.

[0007] Furthermore, the antenna assembly A is connected to the surface acoustic wave sensor via an RF head or RF cable.

[0008] Furthermore, the antenna kit B is connected to the reader via an RF head or RF cable.

[0009] Furthermore, the magnet is a ring magnet.

[0010] Furthermore, the communication module is one or more of TTL serial port, RS485, LoRa, Bluetooth, WIFI, and WAPI dedicated port, which can realize local or wireless communication.

[0011] Furthermore, the antennas in both antenna kit A and antenna kit B are spring antennas.

[0012] Furthermore, the surface acoustic wave sensor adopts a mushroom-shaped probe structure that can be built into a gas valve. The surface acoustic wave sensor includes a metal cover, a sensor substrate, and an RF head. The probe structure has standard threads that can be tightly connected to the sensor cavity of a dedicated gas valve or a multi-port gas valve.

[0013] The technical advantages of this patent are: (1) The packaging of this utility model adopts a connection method in which the surface acoustic wave sensor, radio frequency connector, antenna kit A, antenna kit B and reader are connected in sequence. Antenna kit A and antenna kit B are independent units. Antenna kit A and antenna kit B each include the same insulating sheath. Therefore, the sensor and the reader can achieve both a stable and reliable connection and wireless passive safety isolation.

[0014] (2) The second problem solved by this patent: Based on the fact that the antenna kit B and the reader can be integrated into one device through the radio frequency connector, it can move to read and write multiple surface acoustic wave sensors on site, thereby saving investment costs.

[0015] (3) Save on operation and maintenance costs. The surface acoustic wave sensor and the matching reader are separate, and the surface acoustic wave sensor does not require the deployment of power supply lines. Therefore, the reader can be removed with confidence during operation and maintenance without worrying about affecting the operation of monitoring equipment, such as SF6 insulated high-voltage equipment.

[0016] (4) Improved reliability. The surface acoustic wave sensor can be stably placed in SF6 gas for a long time without being affected by the external environment. This avoids a series of problems caused by the need to take gas from the gas valve for measurement in the existing technology, such as pollution, environmental pollution, gas pipeline pollution, gas poisoning, and damage to the valve's self-locking function. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the magnetic connection between antenna kit A and antenna kit B in an embodiment of this utility model.

[0019] Figure 3 The above are external views of antenna kit A and antenna kit B according to embodiments of this utility model.

[0020] Figure 4 This is a circuit diagram of the reader / writer according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram showing the connection between the surface acoustic wave sensor and the antenna in an embodiment of this utility model.

[0022] Figure 6 This is a packaging diagram of the surface acoustic wave sensor according to an embodiment of the present invention.

[0023] The markings in the diagram are: 1. SMA female connector; 2. SMA fixing nut; 3. Protective cover; 4. Protective shield; 5. Second protective shield; 6. Antenna; 7. Seal; 8. Desiccant cap; 9. Test rod; 10. Filter cover; 11. Metal filter screen; 12. Valve body; 13. Valve body inspection device; 14. Valve circuit board assembly; 15. Cavity; 16. Mesh pattern; 18. Antenna kit A; 19. Antenna kit B; 20. Magnet; 21. Card reader interface; 22. Sensor interface. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1As shown, this embodiment of the present invention provides a multi-parameter surface acoustic wave sensor and a reader / writer terminal for high-voltage power equipment, including a first unit and a second unit. The first unit is on the left, and the second unit is on the right. The first unit includes a surface acoustic wave sensor and an antenna assembly A 18. The second unit includes an antenna assembly B 19 and a reader / writer. The surface acoustic wave sensor is connected to the antenna assembly A 18. The antenna assembly B 19 is connected to the reader / writer.

[0028] like Figure 2 As shown, antenna kit A 18 and antenna kit B 19 each include the same insulating sleeve. The insulating sleeve houses the antenna and RF connector; a magnet 20 is also located at the bottom of the insulating sleeve; antenna kit A 18 and antenna kit B 19 can be magnetically connected via the magnet 20. The magnet 20 is a ring magnet. The surface acoustic wave sensor is connected to antenna kit A 18 via the RF connector. In this embodiment, the RF connector serves as the sensor interface. The RF connector is one or more of SMA, IPEX, and BNC. Antenna kit A 18 is connected to the surface acoustic wave sensor via the RF connector or RF cable. Antenna kit B 19 is connected to the reader / writer via the RF connector or RF cable. In this embodiment, the RF connector serves as the reader / writer interface 21. Antenna 6 is a spring antenna.

[0029] like Figure 3 As shown, the surface acoustic wave (SAW) sensor employs a mushroom-shaped probe structure that can be integrated into a gas valve. The SAW sensor includes a metal housing, a sensor substrate, and an RF head. The probe structure features standard threads for a tight connection to the sensor cavity of a dedicated gas valve or multi-port gas valve.

[0030] The reader / writer includes an RF transmitter, an RF receiver, and a UHF partial discharge signal acquisition unit. It also includes an RF source, a power divider, a directional coupler, an amplitude and phase detector, a dedicated UHF RF detector, a microprocessor, an ADC module, a display, and a communication module. The RF transmitter, RF receiver, UHF partial discharge signal acquisition unit, RF source, power divider, directional coupler, amplitude and phase detector, dedicated UHF RF detector, ADC module, display, and communication module are all connected to the microprocessor. The circuit diagram of the reader / writer is shown below. Figure 4 As shown. The communication module is one or more of the following: TTL serial port, RS485, LoRa, Bluetooth, WIFI, and WAPI dedicated port, which can realize local or wireless communication.

[0031] like Figure 5 , Figure 6 As shown, Figure 5 This is a schematic diagram of a sensor structure for a bare, exposed wire without an antenna assembly. Figure 6This is a typical internal diagram, also without the antenna assembly. The spiral antenna in the diagram embodies a typical antenna structure, which can be easily fitted onto the tubular antenna assembly without affecting the internal magnetic ring structure of the tubular antenna assembly, facilitating an isolated connection for magnetic adsorption between the sensor and the reader. The surface acoustic wave sensor in this embodiment includes an SMA female connector 1, 2, an SMA fixing nut 2, a protective cover 3, a protective shield 4, a second protective shield 5, a sealing element 7, a desiccant cap 8, a test rod 9, a filter cover 10, a metal filter screen 11, a valve body 12, a valve body inspection device 13, a valve circuit board assembly 14, a cavity 15, and a mesh pattern 16.

[0032] The first unit is a passive wireless surface acoustic wave sensor and antenna kit A 18; the second unit is a powered, portable reader and antenna kit B 19 that can also be used for online monitoring.

[0033] Because the second unit can be moved flexibly and can monitor for short or long periods, it can also be flexibly connected to a third-party communication network to achieve remote data transmission.

[0034] The first and second units achieve information interaction through wireless passive coupling, which has good reliability, prevents electrical interference into the reader, and effectively improves personal safety. At the same time, since the surface acoustic wave sensor is usually built into a three-way or multi-way valve, it usually does not need to be disassembled, thus achieving basic maintenance-free operation and eliminating the need for power supply deployment.

[0035] The reader (sensing terminal) described in this patent also features low power consumption. It can be used not only for single-frequency detection of resonant surface acoustic wave sensors, but also for frequency sweep measurement to achieve detection of multiple frequency points. At the same time, given the scanning mode, it can also be used to check delay line surface acoustic wave sensors. Therefore, the reader can theoretically serve as an independent surface acoustic wave sensing terminal to complete the interpretation of various existing surface acoustic wave sensors.

[0036] This patented UHF external antenna enables the acquisition of UHF signals. Due to the use of a wideband detector, it can meet a very high frequency detection range, such as the acquisition of partial discharge signals with an 8GHz bandwidth.

[0037] Of course, the circuit of this patent is very practical and easy to miniaturize and reduce power consumption. If a timed detection method is adopted, this patent can be further improved into an active wired monitor with direct connection between the reader and the surface acoustic wave sensor.

[0038] This patent solves the sensor deployment problem, and based on magnetic adsorption, it also solves the jitter or noise problem caused by the unstable layout of passive wireless sensor antenna and reader antenna; it also solves the reader's versatility problem, so it can be used for online monitoring of GIS, transformers, switch cabinets, ring main units, cables, or other production sites. The reader can also be used for monitoring and inspection of the production and manufacturing of surface acoustic wave sensors.

[0039] Although the structure described in this patent is shown as a single surface acoustic wave sensor and a single sensing terminal (reader), it is clear that it can be expanded to monitor multiple sensors.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment, comprising a first unit and a second unit; characterized in that, The first unit includes a surface acoustic wave sensor and antenna assembly A; the second unit includes antenna assembly B and a reader / writer; the surface acoustic wave sensor is connected to antenna assembly A; antenna assembly B is connected to the reader / writer; antenna assembly A and antenna assembly B each include the same insulating sleeve; the insulating sleeve contains an antenna and an RF connector; the bottom of the insulating sleeve also has a magnet; antenna assembly A and antenna assembly B can be magnetically connected by the magnet; the reader / writer includes an RF transmitter, an RF receiver, and a UHF partial discharge signal acquisition terminal; the reader / writer also includes an RF source, a power divider, a directional coupler, an amplitude and phase detector, a UHF dedicated RF detector, a microprocessor, an ADC module, a display, and a communication module; the RF transmitter, RF receiver, UHF partial discharge signal acquisition terminal, RF source, power divider, directional coupler, amplitude and phase detector, UHF dedicated RF detector, ADC module, display, and communication module are respectively connected to the microprocessor.

2. The multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: The surface acoustic wave sensor and antenna kit A are connected via an RF connector; the RF connector is one or more of SMA, IPEX, and BNC.

3. The multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: The antenna assembly A is connected to the surface acoustic wave sensor via an RF head or RF cable.

4. The multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: The antenna kit B is connected to the reader via an RF head or RF cable.

5. A multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: The magnet is a ring magnet.

6. A multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: The communication module is one or more of the following: TTL serial port, RS485, LoRa, Bluetooth, WIFI, and WAPI dedicated port, which can realize local or wireless communication.

7. A multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: Both antennas in antenna kit A and antenna kit B are spring antennas.

8. A multi-parameter surface acoustic wave sensor and read / write terminal for high-voltage power equipment according to claim 1, characterized in that: The surface acoustic wave sensor adopts a mushroom-shaped probe structure that can be built into a gas valve. The surface acoustic wave sensor includes a metal cover, a sensor substrate, and an RF head. The probe structure has standard threads that can be tightly connected to the sensor cavity of a dedicated gas valve or a multi-port gas valve.

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