A wireless SF6 gas pressure gauge pressure monitoring device

Abstract

This application provides a wireless SF6 pressure gauge monitoring device, including a monitoring master unit and a monitoring slave unit. The monitoring slave unit collects the alarm signals of the monitored SF6 pressure gauge and transmits them to the monitoring master unit wirelessly. The monitoring slave unit is installed in the control cabinet of the upgraded interval connected to the monitored SF6 pressure gauge and is electrically connected to the monitored SF6 pressure gauge. The monitoring master unit is installed in the adjacent un-upgraded interval control cabinet. The output contacts of the monitoring master unit are connected to the alarm input of the adjacent interval control cabinet. The monitoring device provided by this invention can quickly and conveniently realize real-time monitoring of multiple SF6 pressure gauge alarms corresponding to the upgraded interval control cabinet, without the need for additional temporary cable laying, improving the efficiency of integrated automation upgrades, saving manpower and material resources, avoiding safety hazards caused by improper temporary cable laying, and reducing the burden of on-site management.

Description

Technical Field

[0001] This invention pertains to gas pressure monitoring technology, and particularly relates to a wireless SF6 pressure gauge pressure monitoring device. Background Technology

[0002] Sulfur hexafluoride (SF6) gas has a stable molecular structure and unique dielectric properties, and is often used in power systems to achieve voltage electrical insulation, current interruption and arc extinguishing in power transmission and distribution.

[0003] Pressure and concentration monitoring of SF6 insulating gas is a current research hotspot. Indoors, SF6 pressure gauges and SF6 gas concentration monitoring devices are typically used together to monitor SF6 gas, while outdoors, only SF6 pressure gauges are used. When using SF6 pressure gauges to monitor the SF6 gas pressure inside GIS equipment, a control device is needed to power the passive contacts of the SF6 pressure gauge. When the contacts close, the control device can sense the relevant signal and issue an alarm.

[0004] When upgrading a power system's integrated automation system, the connection lines of the old monitoring and control devices need to be disconnected before connecting the new devices, and finally, the system is tested and powered on. This can cause the SF6 pressure gauge monitoring alarm to malfunction during the device replacement interval, making it difficult to detect SF6 gas leaks that occur during the replacement interval. Currently, the solution is to lay temporary cables in the unmodified control cabinets of the bays and connect the SF6 pressure gauge contacts to adjacent unmodified monitoring and control devices. However, this method is time-consuming and labor-intensive, and improper laying of temporary cables can also lead to safety hazards. Summary of the Invention

[0005] Based on this, the present invention aims to provide a wireless SF6 pressure gauge monitoring device, wherein the monitoring master unit is set in the unmodified control cabinet adjacent to the SF6 pressure gauge being monitored, and the monitoring slave unit is set in the modified control cabinet corresponding to the currently monitored SF6 pressure gauge. The monitoring slave unit and the monitoring master unit transmit alarm signals for monitoring the SF6 pressure gauge through wireless communication.

[0006] This invention provides a wireless SF6 pressure gauge monitoring device, comprising a monitoring master unit and a monitoring slave unit;

[0007] The monitoring machine's output contacts are connected to the alarm input of the first bay control cabinet, and the monitoring slave unit is set in the second bay control cabinet and electrically connected to the monitored SF6 pressure gauge.

[0008] The first and second bay control cabinets are set up adjacent to each other. The monitoring slave unit transmits alarm signals to the monitoring master unit via wireless communication. The alarm signal triggers the closing of the output contacts of the monitoring master unit.

[0009] Furthermore, the monitoring sub-unit includes a first wireless communication module, a first signal processing module, and a signal acquisition module. The output terminal of the signal acquisition module is connected to the input terminal of the first signal processing module, and the input terminal of the first wireless communication module is connected to the output terminal of the first signal processing module.

[0010] The signal acquisition module is used to acquire the first alarm signal emitted by the monitored SF6 pressure gauge and send the first alarm signal to the first signal processing module.

[0011] The first signal processing module performs analog-to-digital conversion on the first alarm signal to obtain a converted alarm signal, and transmits the converted alarm signal to the monitoring host machine through the first wireless communication module.

[0012] Furthermore, the signal acquisition module includes terminal blocks and a first optocoupler;

[0013] The input terminal of the terminal block is connected to the transmitting passive contact of the monitored SF6 pressure gauge to receive the first alarm signal issued by the monitored SF6 pressure gauge. The output terminal of the terminal block is connected to the input terminal of the first optocoupler. The first optocoupler converts the first alarm signal into a level signal and sends it to the first signal processing module through its output terminal.

[0014] Furthermore, the monitoring sub-unit also includes a test module, which is connected to the input terminal of the signal acquisition module;

[0015] The test module is equipped with a test button to simulate the closing of the transmitting passive contact of the monitored SF6 barometer.

[0016] Furthermore, the first signal processing module includes a first microcontroller.

[0017] Furthermore, the monitoring unit includes a second wireless communication module, a second signal processing module, a hardware self-locking module, and a reset module. The output terminal of the second wireless communication module is connected to the input terminal of the second signal processing module, the input terminal of the hardware self-locking module is connected to the output terminal of the second signal processing module, and the reset module is connected to the hardware self-locking module.

[0018] Furthermore, the hardware self-locking module includes a first transistor, a second transistor, a second optocoupler, and a relay;

[0019] The base of the first transistor is connected to the output of the second signal processing module, and its collector is connected to the base of the second transistor. The collector of the second transistor is connected to the input of the second optocoupler. The output of the second optocoupler is connected to the input of the relay, and the output of the relay is connected to the alarm input of the first bay control cabinet.

[0020] Furthermore, the reset module includes a reset button, the first end of which is connected to the base of the first transistor, and the second end of which is grounded.

[0021] Furthermore, the second signal processing module includes a second microcontroller.

[0022] Furthermore, the wireless communication method between the monitoring slave unit and the monitoring master unit includes one of LoRa communication, WiFi transmission, and satellite GPS communication.

[0023] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0024] This invention provides a wireless SF6 pressure gauge monitoring device, comprising a monitoring master unit and a monitoring slave unit. The monitoring slave unit collects alarm signals from the monitored SF6 pressure gauge and transmits them wirelessly to the monitoring master unit. The monitoring slave unit is installed in the control cabinet of the upgraded bay connected to the monitored SF6 pressure gauge and is electrically connected to the monitored SF6 pressure gauge. The monitoring master unit is installed in the adjacent un-upgraded bay control cabinet. The output contacts of the monitoring master unit are connected to the alarm input of the adjacent bay control cabinet. The monitoring device provided by this invention can quickly and conveniently realize real-time monitoring of multiple SF6 pressure gauge alarms corresponding to the upgraded bay control cabinet, without the need for additional temporary cable laying, improving the efficiency of integrated automation upgrades, saving manpower and resources, avoiding safety hazards caused by improper temporary cable laying, and reducing the burden of on-site management. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram illustrating the principle of using an SF6 barometer for air pressure monitoring;

[0027] Figure 2 This is a schematic diagram of the temporary wiring of an SF6 pressure gauge during the comprehensive automation upgrade of a power system using existing technology.

[0028] Figure 3 A schematic diagram illustrating the application of the wireless SF6 pressure gauge pressure monitoring device provided in this application embodiment;

[0029] Figure 4 for Figure 3 A schematic diagram illustrating a device in an alarm state;

[0030] Figure 5 This is a flowchart illustrating the operation of the monitoring sub-machine provided in an embodiment of this application.

[0031] Figure 6This is a flowchart of the monitoring machine operation provided in an embodiment of this application;

[0032] Figure 7 A schematic diagram illustrating wireless communication between a monitoring master unit and multiple monitoring slave units provided in an embodiment of this application;

[0033] Figure 8 This is a topology diagram of the monitoring sub-machine provided in the embodiments of this application;

[0034] Figure 9 for Figure 8 A schematic diagram illustrating the working principle of the first power supply module in the monitoring sub-unit;

[0035] Figure 10 for Figure 8 A schematic diagram illustrating the working principle of the first wireless LoRa module in the monitoring sub-unit;

[0036] Figure 11 for Figure 8 A schematic diagram illustrating the working principle of the first microcontroller minimum system in the monitoring sub-unit;

[0037] Figure 12 for Figure 8 A schematic diagram illustrating the working principle of the signal acquisition circuit and test circuit in the monitoring sub-unit;

[0038] Figure 13 This is a topology diagram of the monitoring host machine provided in the embodiments of this application;

[0039] Figure 14 for Figure 13 The schematic diagram illustrates the working principle of the hardware self-locking circuit and reset circuit in the monitoring machine. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, the principle of monitoring using an SF6 pressure gauge is to install an SF6 pressure gauge connected to the inside of each independent GIS gas chamber. The reading of the pressure gauge is the actual SF6 pressure value inside the chamber. When SF6 gas leaks and the pressure gauge reading drops to a preset threshold, the passive contact of the pressure gauge for "alarm" or "lock" will close to send an alarm or lockout message to the outside.

[0042] When using an SF6 pressure gauge to monitor the gas pressure inside a GIS (Gas Insulated Switchgear) device, a control device needs to supply power to the passive contacts of the pressure gauge. When the pressure gauge contacts close, the control device can sense the closure and issue an alarm signal. However, in current integrated automation upgrade projects, it is necessary to completely disconnect all the wiring of the old control device before connecting the new one, and finally perform acceptance testing and power-on. Figure 2 As shown, this process causes the monitoring alarm of the SF6 pressure gauge to fail during the equipment replacement interval, making it difficult to detect SF6 gas leaks. The traditional solution is to lay a temporary cable on the unmodified control cabinet and connect the failed alarm contact to the unmodified monitoring and control device, such as... Figure 2 As shown by the dotted line, this method is time-consuming and labor-intensive, and improper temporary cable laying can lead to many safety hazards.

[0043] To address the aforementioned technical issues, this application aims to provide a wireless SF6 pressure gauge monitoring device. The monitoring master unit is located in an unmodified control cabinet adjacent to the SF6 pressure gauge being monitored, while the monitoring slave unit is located in the modified control cabinet corresponding to the currently monitored SF6 pressure gauge. The monitoring slave unit and the monitoring master unit transmit alarm signals for monitoring the SF6 pressure gauge via wireless communication.

[0044] like Figure 3 As shown, one embodiment of this application provides a wireless SF6 pressure gauge pressure monitoring device, including a monitoring master unit 310 and a monitoring slave unit 320.

[0045] The monitoring mother unit 310 has its output contacts connected to the alarm input of the first bay control cabinet 330, and the monitoring daughter unit 320 is located in the second bay control cabinet 340 and is electrically connected to the monitored SF6 pressure gauge 400.

[0046] The first bay control cabinet 330 and the second bay control cabinet 340 are arranged adjacent to each other. The monitoring slave unit 320 transmits alarm signals to the monitoring master unit 310 via wireless communication. The alarm signal triggers the closing of the output contact of the monitoring master unit 310.

[0047] In this embodiment, the first bay control cabinet is an unmodified bay control cabinet adjacent to the monitored SF6 pressure gauge, and the second bay control cabinet is a modified bay control cabinet connected to the monitored SF6 pressure gauge. During the technical modification of the relevant bay control cabinets, the monitoring slave unit is placed inside the modified bay control cabinet and connected to the passive contact for SF6 pressure gauge alarm transmission. It monitors the SF6 pressure gauge pressure in real time. When the SF6 pressure gauge pressure is too low and reaches a preset pressure threshold, the passive contact of the pressure gauge closes, the slave unit receives the alarm input, and transmits the information wirelessly to the monitoring master unit. The master unit is placed inside an adjacent unmodified bay control cabinet. The output contact of the monitoring master unit is connected to the alarm input of that bay control cabinet. The alarm signal from the monitoring slave unit triggers the output contact to close. Figure 4 As shown, this enables rapid real-time monitoring of multiple SF6 gauges for low pressure alarms without the need for temporary cable laying.

[0048] In a further embodiment, the monitoring sub-unit provided in this application includes a first wireless communication module, a first signal processing module, and a signal acquisition module. The output terminal of the signal acquisition module is connected to the input terminal of the first signal processing module, and the input terminal of the first wireless communication module is connected to the output terminal of the first signal processing module. The signal acquisition module is used to acquire a first alarm signal emitted by the monitored SF6 pressure gauge, send the first alarm signal to the first signal processing module, perform analog-to-digital conversion on the first alarm signal to obtain a converted alarm signal, and transmit the converted alarm signal to the monitoring main unit through the first wireless communication module.

[0049] Specifically, the first signal processing module is used to convert the analog signals acquired by the signal acquisition module into digital signals. In some embodiments, the digital signals are also encrypted to ensure the integrity and confidentiality of the data, resist external interference, and prevent multiple signal acquisition modules from interfering with each other in signal transmission.

[0050] For example, the first signal processing module includes a microcontroller chip, especially the STMicroelectronics STM32F103 chip, which can operate at a maximum frequency of 80MHz to meet the device's communication requirements. It converts analog signals into digital signals and then encrypts them using the AES-128-bit encryption algorithm, so that each data node of the signal has a unique key.

[0051] In a further embodiment, the signal acquisition module includes a terminal block and a first optocoupler. The input end of the terminal block is connected to the transmitting passive contact of the monitored SF6 pressure gauge to receive the first alarm signal emitted by the monitored SF6 pressure gauge. The output end of the terminal block is connected to the input end of the optocoupler. The optocoupler converts the first alarm signal into a level signal and sends it to the first signal processing module through its output end.

[0052] In this embodiment, the low-pressure alarm signal transmitted after the passive contact of the SF6 barometer is closed is acquired through the wiring terminal, and the alarm signal is converted into a level signal through the first optocoupler and sent to the first signal processing module.

[0053] In a further embodiment, the monitoring sub-unit also includes a test module connected to the input terminal of the signal acquisition module. The test module is equipped with a test button to simulate the closing of the transmitting passive contact of the monitored SF6 barometer.

[0054] The above embodiments specifically illustrate the working principle of the monitoring sub-unit. Figure 5 This illustrates one possible operating procedure for the monitoring slave unit. After startup, the monitoring slave unit begins hardware initialization, including clock initialization, I / O initialization, and peripheral initialization, bringing all hardware into working condition. It then requests communication, requiring a correct response from the monitoring master unit to ensure normal communication. If there is no response or the response data is incorrect, the device will remain in the communication request state, indicating to the operator via flashing indicator lights that communication is not connected. After a normal communication response, the optocoupler in the signal acquisition module is activated to detect whether the passive transmitting contact of the SF6 pressure gauge is closed. If not, the detection continues; if it is, the device requests data from the monitoring master unit. The monitoring master unit will reject the communication request if it is busy, at which point the monitoring slave unit continues to send the request. Once the request is successful, the alarm signal is transmitted to the monitoring master unit wirelessly.

[0055] In a further embodiment, the monitoring host includes a second wireless communication module, a second signal processing module, a hardware self-locking module, and a reset module. The output terminal of the second wireless communication module is connected to the input terminal of the second signal processing module, the input terminal of the hardware self-locking module is connected to the output terminal of the second signal processing module, and the reset module is connected to the hardware self-locking module.

[0056] In this embodiment, the main function of the second wireless communication module is to receive alarm signals transmitted by the monitoring slave unit in the form of radio waves. The second signal processing module is used to process the digital alarm signals received by the second wireless communication module, parse them through a decryption program, and control the hardware self-locking module to close the internal alarm contacts. The hardware self-locking module is used to lock the closed state of the input contacts of the monitoring master unit, thereby improving the practicality of the device.

[0057] In some embodiments, the second signal processing module includes a microcontroller chip, which may use the same chip as the first signal processing module or a different chip.

[0058] For example, the hardware self-locking module includes a first transistor, a second transistor, a second optocoupler, and a relay; the base of the first transistor is connected to the output terminal of the second signal processing module, its collector is connected to the base of the second transistor, the collector of the second transistor is connected to the input terminal of the second optocoupler, the output terminal of the second optocoupler is connected to the input terminal of the relay, and the output terminal of the relay is connected to the alarm input of the first bay control cabinet.

[0059] In this embodiment, the conduction of the first transistor triggers the conduction of the second transistor. After the second transistor conducts, it triggers the photodiode in the second optocoupler to emit light. The second optocoupler is triggered and drives the relay to operate, causing the output terminal of the relay to engage. Since the output terminal of the relay is connected to the alarm input of the adjacent unmodified control cabinet, the alarm signal of the monitored SF6 pressure gauge is transmitted to the measurement and control device.

[0060] In a further embodiment, the reset module includes a reset button, the first end of which is connected to the base of the first transistor, and the second end of which is grounded.

[0061] In a further embodiment, the wireless communication method between the monitoring slave unit and the monitoring master unit includes one of LoRa communication, WiFi transmission, and satellite GPS communication.

[0062] The above embodiments specifically illustrate the working principle of the monitoring machine. Figure 6 This illustrates an optional operating procedure for the monitoring master unit. After the monitoring master unit starts up, it first initializes the hardware to put all hardware into working state, and then requests communication from the monitoring slave units. When it obtains data from any monitoring slave unit, it briefly rejects the communication requests of other monitoring slave units until the current wireless communication ends. After obtaining an alarm signal from a monitoring slave unit, the monitoring master unit controls the alarm output and realizes the contact closure self-holding function through a hardware self-locking module. The whole process is highly efficient, reliable, and versatile.

[0063] Figure 7 This diagram illustrates an architecture of the wireless SF6 pressure gauge monitoring device provided in this application. One monitoring master unit can communicate wirelessly with multiple monitoring slave units. The wireless communication between a single monitoring slave unit and the monitoring master unit, as well as the signal processing within the device, follow the operating principles provided in the above embodiments.

[0064] To further illustrate the wireless SF6 barometer pressure monitoring device provided in this application, the following is a specific application example.

[0065] like Figure 8As shown, one embodiment of this application provides a device structure for a monitoring slave unit, including a 12V lithium battery / 12V power adapter 810, a first power module 820, a first wireless LoRa module 830, a first microcontroller minimum system 840, a signal acquisition circuit 850, and a test circuit 860. The first power module 820 converts the 12V DC power provided by the 12V lithium battery / 12V power adapter 810 into 3.3V and 5V to power the first wireless LoRa module 830, the first microcontroller minimum system 840, the signal acquisition circuit 850, and the test circuit 860. The first microcontroller minimum system 840 is electrically connected to the first wireless LoRa module 830 and the signal acquisition circuit 850, respectively. The signal acquisition circuit 850 is electrically connected to the test circuit 860. The input terminal of the signal acquisition circuit 850 is also connected to the transmitting passive contact of an SF6 pressure gauge.

[0066] The 12V lithium battery provides power to the entire monitoring unit. The 12V power adapter converts AC220V mains power into 12V DC power and can replace the 12V lithium battery as the working power source.

[0067] Figure 9 The schematic diagram of the first power supply module 820 is shown. It uses a WT6108 step-down chip to convert 12V DC voltage to 3.3V voltage and a WT6106 step-down chip to convert 12V DC voltage to 5V voltage.

[0068] Figure 10 The schematic diagram of the first wireless LORA module 830 is shown. It uses the SX1268 wireless LORA chip as the signal transmission medium to convert the alarm signal of the SF6 pressure gauge into a radio wave signal of the LORA protocol and transmit it to the monitoring host through the air medium.

[0069] Figure 11 The principle of the first microcontroller minimum system 840 is shown. It is built with STMicroelectronics STM32F103 chip and can operate at a maximum frequency of 80MHz to meet the communication requirements of the device. Its main function is to convert analog signals into digital signals and then encrypt them with AES-128-bit encryption algorithm so that each data node of the signal has a unique key.

[0070] Figure 12 The working principle of the signal acquisition circuit 850 and the test circuit 860 is shown. The alarm signal emitted when the SF6 pressure gauge contact is closed is acquired through the terminal L1, and the alarm signal is converted into a TTL level signal through the optocoupler U1 and uploaded to the CPU. The test circuit is a button circuit. The button K1 is connected to the terminal L1. Pressing the test button K1 shorts the terminal L1, simulating the closure of the external SF6 alarm signal contact, so as to achieve the purpose of testing the device.

[0071] like Figure 13 As shown, one embodiment of this application provides a device structure for a monitoring master unit, including a 12V lead-acid battery / 12V power adapter 910, a second power module 920, a second wireless LORA module 930, a second microcontroller minimum system 940, a hardware self-locking circuit 950, and a reset circuit 960. The 12V lead-acid battery consists of two 6V lead-acid batteries connected in series, with a capacity of 9Ah, providing operating power to the monitoring master unit. It can be charged using a solar panel. The 12V power adapter converts AC220V mains power into 12V DC power and can replace the 12V lead-acid battery as the operating power source. The second power module 920 operates on the same principle as the first power module 720 in the monitoring slave unit. The second microcontroller minimum system 940 is electrically connected to the second wireless LORA module 930 and the hardware self-locking circuit 950, respectively. The hardware self-locking circuit 950 is electrically connected to the reset circuit 960, and the output of the hardware self-locking circuit 950 is connected to the alarm input of the designated interval control cabinet.

[0072] In this embodiment, the second wireless LoRa module 930 and Figure 10 The first wireless LoRa module 830 shown operates on the same principle; the second microcontroller minimum system 940 is the same as... Figure 11 The first microcontroller minimum system 840 shown is the same, also using STMicroelectronics' STM32F103 chip. Its main function is to process the digital alarm signals received by the second wireless LORA module 930, and to decrypt and analyze them through a decryption program, while controlling the hardware self-locking circuit 950 to close the internal alarm contacts.

[0073] Figure 14 The diagram illustrates the working principle of the hardware self-locking circuit 950 and the reset circuit 960, including a first transistor U5, a second transistor U4, a second optocoupler U2, and a relay U3. The base of the first transistor U5 is connected to the CPU terminal of the second microcontroller minimum system 940, and its collector is connected to the base of the second transistor U4 through resistors R1 and R2. The collector of the second transistor U4 is connected to the cathode of the LED in the second optocoupler U2 through resistor R5. The emitter of the transistor in the second optocoupler U2 is connected to the input terminal of the relay U3, and the output terminal of the relay U3 is connected to the alarm input of the control cabinet in the corresponding bay. One end of the reset button K2 is connected to the base of the first transistor U5, and the other end is grounded.

[0074] When the CPU receives an alarm signal from the monitoring slave unit, it outputs a high level through its pin, turning on the first transistor U5. After U5 turns on, the circuit of U5, R2, and R1 is connected, and the base and emitter of the second transistor U4 receive a voltage of approximately 3.8V, causing U4 to also turn on. After U4 turns on, the optocoupler U2 is connected to ground through U4, triggering U2 and illuminating its LED. The triggering of U2 drives the relay U3, causing the "no" alarm contact to close. When the alarm input of the control cabinet in the monitoring master unit's bay is connected to this contact, the alarm can be transmitted to the measurement and control device. At this time, even if the CPU pin no longer outputs a low level, the base of the first transistor U5 receives a continuous low level due to the conduction of the second transistor U4, maintaining its conducting state and keeping the circuit state active. The "no" contact of the relay U3 remains continuously closed, achieving state self-locking.

[0075] In the hardware self-locking state, pressing button K2 of reset circuit 960 will cause the base of the first transistor U5 to receive a high level and be cut off, and then the base of the second transistor U4 will lose a high level and be cut off. The optocoupler U2 will stop outputting, the relay U3 will stop operating, the LED will turn off, the no contact will open, and the entire circuit will be reset.

[0076] The invention has been described in particular detail above with respect to possible scenarios, and those skilled in the art will recognize that the invention can be practiced through other embodiments. Specific naming of components, capitalization of terms, attributes, data structures, or any other programming or structural aspects are not mandatory or important, and the mechanisms or features of implementing the invention may have different names, forms, or procedures. The system can be implemented through a combination of hardware and software (as described), entirely through hardware elements, or entirely through software elements. The specific division of functions among the various system components described herein is merely exemplary and not mandatory; rather, the functions performed by a single system component can be performed by multiple components, or the functions performed by multiple components can be performed by a single component.

[0077] Certain aspects of this invention include the process steps and instructions described herein in algorithmic form. It should be noted that the process steps and instructions of this invention can be implemented in software, firmware, and / or hardware, and when implemented in software, they can be downloaded, stored on various operating systems and operated from said platforms.

[0078] Those skilled in the art will understand that the structures shown in the figures are merely block diagrams of some structures related to the present application and do not constitute a limitation on the terminal device to which the present application is applied. Specific terminal devices may include more or fewer components than those shown in the figures, or combine certain components, or have different component arrangements.

[0079] Some embodiments may be described using the terms "coupled" and "connected" and their derivatives. It should be understood that these terms are not intended to be synonymous with each other. For example, some embodiments may be described using the term "connected" to indicate that two or more elements are in direct physical or electrical contact with each other. In another example, some embodiments may be described using the term "coupled" to indicate that two or more elements are in direct physical or electrical contact with each other. However, the term "coupled" may also mean that two or more elements are not in direct contact with each other, but still cooperate or interact with each other. Embodiments are not limited to this context.

[0080] In the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "possible design," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wireless SF6 pressure gauge pressure monitoring device, characterized in that, Includes monitoring master unit and monitoring slave unit; The output contacts of the monitoring mother unit are connected in parallel to the alarm input of the first bay control cabinet, and the monitoring daughter unit is set in the second bay control cabinet and electrically connected to the monitored SF6 pressure gauge. The first and second interval control cabinets are arranged adjacent to each other. The monitoring sub-unit transmits an alarm signal to the monitoring master unit via wireless communication. The alarm signal triggers the closing of the output contact of the monitoring master unit. The monitoring sub-unit includes a first wireless communication module, a first signal processing module, and a signal acquisition module. The output terminal of the signal acquisition module is connected to the input terminal of the first signal processing module, and the input terminal of the first wireless communication module is connected to the output terminal of the first signal processing module. The signal acquisition module is used to acquire the first alarm signal emitted by the monitored SF6 pressure gauge and send the first alarm signal to the first signal processing module. The first signal processing module performs analog-to-digital conversion on the first alarm signal to obtain a converted alarm signal, and transmits the converted alarm signal to the monitoring host through the first wireless communication module; The signal acquisition module includes a terminal block and a first optocoupler; The input terminal of the terminal block is connected to the transmitting passive contact of the monitored SF6 pressure gauge to receive the first alarm signal issued by the monitored SF6 pressure gauge. The output terminal of the terminal block is connected to the input terminal of the first optocoupler. The first optocoupler converts the first alarm signal into a level signal and sends it to the first signal processing module through its output terminal. The monitoring host includes a second wireless communication module, a second signal processing module, a hardware self-locking module, and a reset module. The output terminal of the second wireless communication module is connected to the input terminal of the second signal processing module, the input terminal of the hardware self-locking module is connected to the output terminal of the second signal processing module, and the reset module is connected to the hardware self-locking module. The hardware self-locking module includes a first transistor, a second transistor, a second optocoupler, and a relay; The base of the first transistor is connected to the output terminal of the second signal processing module, and its collector is connected to the base of the second transistor. The collector of the second transistor is connected to the input terminal of the second optocoupler. The output terminal of the second optocoupler is connected to the input terminal of the relay. The output terminal of the relay is connected in parallel to the alarm input of the first interval control cabinet.

2. The apparatus of claim 1, wherein, The monitoring sub-unit also includes a testing module, which is connected to the input terminal of the signal acquisition module; The test module is equipped with a test button to simulate the closing of the transmitting passive contact of the monitored SF6 barometer.

3. The apparatus of claim 1, wherein, The first signal processing module includes a first microcontroller.

4. The apparatus according to claim 1, characterized in that, The reset module includes a reset button, the first end of which is connected to the base of the first transistor, and the second end of which is grounded.

5. The apparatus of claim 1, wherein, The second signal processing module includes a second microcontroller.

6. The apparatus of claim 1, wherein, The wireless communication method between the monitoring slave unit and the monitoring master unit includes one of LoRa communication, WiFi transmission, and satellite GPS communication.

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