Uncovering power-off protection system with wireless sensor

Abstract

The utility model relates to an uncovering power-off protection system with a wireless sensor and a use method thereof, the uncovering power-off protection system comprises the wireless sensor, a wireless acquisition base station and an uncovering power-off monitoring substation, and specifically, the wireless sensor monitors the uncovering state or the cover plate screw state of equipment in real time; when it is detected that cover opening or screw abnormal movement exists in the equipment, an illegal electrified cover opening alarm signal is automatically generated and sent to a wireless acquisition base station; the wireless acquisition base station is used for acquiring an alarm signal sent by the wireless sensor and transmitting the alarm signal to the uncovering power-off monitoring substation; and the uncovering power-off monitoring substation is connected with the wireless acquisition base station and is used for receiving and processing data, controlling power-off and displaying a windowed graphical interface on a terminal of the uncovering power-off monitoring substation. Compared with the prior art, the utility model adopts the wireless communication technology, does not need to arrange an extra lead-out wire, and has the advantages of strong safety, high reliability, good economical efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine electrical safety, in particular to a cover-opening power-off protection system with a wireless sensor. Background Art

[0002] With the rapid development of the coal mining industry, the safety of electrical equipment in mines has become increasingly prominent. The coal mine environment is complex and dangerous, and the safe operation of electrical equipment is crucial. Any failure may lead to serious safety accidents. The "Coal Mine Safety Regulations" stipulates: "Electrical equipment, cables and wires shall not be repaired or moved underground with power on." However, in actual operation, due to the lack of equipment and equipment, live maintenance occurs from time to time, causing accidents such as electric shock and explosion. Therefore, the development of an efficient and reliable intelligent cover opening power-off protection system is of great significance to ensure the electrical safety of coal mines.

[0003] The current power-off schemes for opening the cover are mainly divided into two categories: explosion-proof cover auxiliary switch and two anti-locks. The explosion-proof cover auxiliary switch divides the explosion-proof wiring cavity into the power supply inlet cavity and the load outlet cavity, and uses the auxiliary mechanical device on the explosion-proof cover plate to achieve power-off protection. When a worker opens the cover with power on, the load cavity can be powered off at this level, and the power supply inlet cavity can be manually connected to the leakage resistor to achieve leakage tripping of the upper power supply equipment. This scheme based on leakage tripping is simple and convenient, does not require additional control lines, and has been widely used in domestic coal mines. However, it has safety hazards, such as grounding overvoltage and multiple forced power transmissions that may cause overvoltage and personnel accidents. As for the two anti-lock scheme, it mainly adds a bolt cover to the bolts on the upper cover of the explosion-proof switch, and connects the action sensor to the monitoring system substation to achieve advanced power off of the upper switch. This technology can effectively prevent the cover from being opened with power on, and improve the level of underground electrical safety and information management. However, its disadvantages include the need for additional substations and external leads, and the external leads and communication lines are easily damaged.

[0004] Traditional power-off protection methods for electrical equipment usually rely on manual operation and mechanical devices, which are not only complicated to operate, but also have certain risks of misoperation. With the development of the Internet of Things and intelligent sensing technology, intelligent power-off protection technology and systems based on sensors and wireless communications have gradually become a research hotspot. These systems realize automated and intelligent protection functions by real-time monitoring of equipment status and environmental parameters, greatly improving the safety and reliability of equipment.

[0005] In order to quickly detect illegal live cover opening in coal mines, it is necessary to develop a safe, reliable, fast-response, and economically reasonable explosion-proof electrical equipment cover opening power-off protection system. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model proposes a cover opening power-off protection system with a wireless sensor, which utilizes wireless communication between the sensor and a base station to achieve real-time monitoring of the cover opening status of electrical equipment and power-off control.

[0007] The purpose of the utility model can be achieved through the following technical solutions: a cover-opening power-off protection system with a wireless sensor, comprising a wireless sensor, a wireless acquisition base station and a cover-opening power-off monitoring substation, wherein the wireless sensor collects illegal live cover-opening operation signals of the equipment in real time, generates an alarm signal and transmits it to the wireless acquisition base station; the wireless acquisition base station is used to collect the alarm signal emitted by the wireless sensor and transmit it to the cover-opening power-off monitoring substation; the cover-opening power-off monitoring substation is connected to the wireless acquisition base station for data reception, processing and power-off control, and displaying a windowed graphical interface on its terminal.

[0008] The cover-opening power-off protection system combines the battery duty cycle function and the battery threshold alarm function to achieve comprehensive management and protection of the battery. At the same time, the system uses advanced signal management technology to monitor the signal strength between the sensor and the base station in real time to ensure reliable communication between the sensor and the base station.

[0009] Furthermore, the sensor is installed on the equipment cover, and the wireless sensor includes a housing, an internal contact system, a sensor battery, and an actuator. When the operator opens the cover in violation of regulations, the actuator moves and changes the state of the internal contact, triggering the sensor to send an alarm signal to the base station.

[0010] Furthermore, the wireless sensor uses a 2.4G wireless communication protocol to send alarm information to a wireless collection base station.

[0011] Furthermore, the management scheme of the cover-opening power-off protection system for the sensor battery is specifically as follows: by precisely controlling the duty cycle, the battery charging and discharging process can be optimized, the power efficiency can be improved, and the battery life can be extended.

[0012] Furthermore, the specific protection scheme of the cover opening power-off protection system for the sensor battery is as follows: by setting the battery power threshold alarm, the user can be reminded to pay attention to the battery status in time to avoid sensor failure caused by insufficient power, ensuring the stable operation of the system and sensor and the long-term health of the battery. The value range of the battery power threshold is:

[0013] 0.1Q N ≤Q set ≤0.3Q N

[0014] In the formula, Q N is the rated capacity of the sensor battery, Q set is the preset battery level threshold.

[0015] Furthermore, the signal management technology is specifically: real-time monitoring of the signal strength between the wireless sensor and the wireless acquisition base station, and accurate measurement. The system supports two modes of signal transmission: high power and low power, and automatically switches according to actual needs to balance signal strength and energy consumption. When the signal strength is detected to be lower than the preset threshold, the system will automatically issue a command to increase the signal transmission power. The value range of the signal strength threshold is:

[0016] -80dBm≤RSSI set ≤-60dBm

[0017] Where, RSSI set is the preset signal strength threshold.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] (1) Wireless communication technology: The sensor of the utility model adopts extremely low power consumption wireless communication technology, which does not require the setting of additional lead wires, and can realize real-time monitoring and power-off control of the cover opening status of electrical equipment, with strong safety, high reliability and good economy.

[0020] (2) Efficient automatic control: The utility model realizes real-time monitoring of the cover opening status of electrical equipment and automatic power-off control. Through the coordinated work of sensors and base stations, the tedious manual operation and the risk of misoperation are avoided, thereby improving the safety and reliability of the system.

[0021] (3) Accurate signal management: Utilizing precise wireless signal strength monitoring and dynamic power adjustment technology, the system can automatically increase signal transmission power when the signal strength is below a preset threshold, ensuring stable communication in complex environments while optimizing energy consumption and extending the service life of the device.

[0022] (4) Intelligent adjustment: Through the automated power management mechanism, the system can automatically switch between high-power and low-power modes according to actual needs while ensuring communication quality, achieving the best balance between signal strength and energy consumption.

[0023] (5) Strong adaptability: The utility model can set the wireless communication signal strength threshold according to different application environments and make real-time adjustments to ensure optimal performance under various environmental conditions, with stronger adaptability.

[0024] (6) Enhanced safety: The system design takes into account a variety of possible fault conditions. Through intelligent monitoring and control, it effectively avoids safety hazards caused by ground overvoltage, leakage tripping, etc., and further improves the safety level of coal mine electrical equipment.

[0025] (7) Wide scope of application: The utility model is not only suitable for the electrical safety protection of electrical equipment in coal mines, but can also be widely used in other fields that require power-off protection when the cover is opened, such as petrochemical, chemical and other high-risk industries, and has good market prospects and economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a schematic diagram of the working principle in an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the workflow in the embodiment of the utility model;

[0029] Figure 3 This is an internal schematic diagram of the wireless sensor in the embodiment of the utility model;

[0030] Figure 4 This is a working diagram of the wireless sensor in the embodiment of the utility model;

[0031] Figure 5 This is an internal schematic diagram of a wireless acquisition base station in an embodiment of the utility model;

[0032] Figure 6 The following is a flowchart of the wireless data acquisition base station in the embodiment of the utility model. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] like Figure 1-Figure 6As shown, the utility model discloses a cover-opening power-off protection system with wireless sensors, comprising wireless sensors, wireless acquisition base stations and cover-opening power-off monitoring substations, wherein the wireless sensors acquire illegal live cover-opening operation signals of equipment in real time, generate alarm signals and transmit them to the wireless acquisition base station; the wireless acquisition base station is used to acquire alarm signals emitted by the wireless sensors and transmit them to the cover-opening power-off monitoring substation; the cover-opening power-off monitoring substation is connected to the wireless acquisition base station for data reception, processing and power-off control, and displaying a windowed graphical interface on its terminal.

[0035] The wireless sensor is installed on the equipment cover, and together with the wireless acquisition base station and the cover-opening power-off monitoring substation, forms a cover-opening power-off protection system. The wireless sensor collects the equipment's illegal live cover-opening operation signals in real time, generates an alarm signal and transmits it to the wireless acquisition base station; the wireless acquisition base station is an important part of the information transmission in the cover-opening power-off protection system, and is the hub of information transmission between the sensor and the cover-opening power-off monitoring substation. It is responsible for collecting sensor signals and transmitting them to the cover-opening power-off monitoring substation; the cover-opening power-off monitoring substation is connected to the base station for data reception, processing and power-off control, and displays a windowed graphical interface on its terminal.

[0036] The cover-opening power-off protection system combines the battery duty cycle function and the battery threshold alarm function to achieve comprehensive management and protection of the battery. At the same time, the system uses advanced signal management technology to monitor the signal strength between the sensor and the base station in real time to ensure reliable communication between the sensor and the base station.

[0037] As a preferred embodiment, the sensor is installed on the equipment cover and the cover screws, and the wireless sensor includes a housing, an internal contact system, a sensor battery and an actuator. When the operator violates the regulations and opens the cover with power on, the actuator moves and changes the state of the internal contacts, triggering the sensor to send an alarm signal to the base station.

[0038] As a preferred implementation, the wireless sensor uses 2.4G wireless communication protocol to send alarm information to the wireless acquisition base station. In this embodiment, the sensor uses extremely low power consumption wireless data transmission technology.

[0039] As a preferred implementation, the management scheme of the cover-opening power-off protection system for the sensor battery is specifically as follows: by accurately controlling the duty cycle, the charging and discharging process of the battery can be optimized, the power efficiency can be improved, and the battery life can be extended.

[0040] As a preferred implementation, the specific protection scheme of the cover opening power-off protection system for the sensor battery is: by setting the battery power threshold alarm, the user can be reminded to pay attention to the battery status in time to avoid sensor failure caused by insufficient power, ensuring the stable operation of the system and sensor and the long-term health of the battery. The value range of the battery power threshold is:

[0041] 0.1Q N ≤Q set ≤0.3Q N

[0042] In the formula, Q N is the rated capacity of the sensor battery, Q set is the preset battery power threshold. In this embodiment, the preset battery power threshold is 0.2 times the rated capacity, that is, Q set =0.2Q N .

[0043] As a preferred implementation, the signal management technology specifically includes: real-time monitoring of the signal strength between the sensor and the base station, and accurate measurement. The system supports two modes of signal transmission: high power and low power, and automatically switches according to actual needs to balance signal strength and energy consumption. When the signal strength is detected to be lower than the preset threshold, the system will automatically issue a command to increase the signal transmission power. The value range of the signal strength threshold is:

[0044] -80dBm≤RSSI set ≤-60dBm

[0045] Where, RSSI set is a preset signal strength threshold. In this embodiment, the preset signal strength threshold is -75dBm.

[0046] An optimal implementation can be obtained by combining the above preferred implementation modes, and the scheme of the optimal implementation mode is described in detail below.

[0047] The embodiment of the utility model realizes the safety protection of the cover opening operation of the equipment 1# under the energized state through the cover opening power-off protection system. The specific implementation steps and working principle are described below.

[0048] The system mainly consists of the following parts: cover opening power failure monitoring substation, device 1#, device 2#, device n#, wireless sensor 1, wireless sensor 2, wireless sensor n and wireless acquisition base station. These components cooperate with each other through wireless communication and wired connection to form a complete intelligent cover opening power failure protection system.

[0049] The specific implementation steps are:

[0050] (1) Base station power on: After ensuring that only registered wireless base stations are powered on within the sensor communication range, turn on the wireless base station. At this time, the wireless base station must have at least one sensor location that is not registered, and it is best if there is no interference from other sensors within the communication range.

[0051] (2) Sensor power-on: Install sensor 1 on the cover of device 1# and power it on. After the sensor is powered on, it starts to communicate with the wireless base station. Similarly, install the remaining sensors on the corresponding device covers and power them on to communicate with the base station.

[0052] (3) Press the registration button: The operator presses the registration button on sensor 1, and sensor 1 begins to register and communicate with the wireless base station. After registration is completed, sensor 1 officially joins the system and begins to monitor the status of device 1# in real time.

[0053] (4) Monitoring and management: Sensor 1 monitors the status of equipment 1# in real time, especially the operation of the cover and cover screws of equipment 1#.

[0054] (5) Registration management: The system reads the base station registration status through the RS 485 bus to confirm that the registration is successful.

[0055] (6) Signal management: Sensor 1 monitors the signal strength between the sensor and the base station in real time and makes precise measurements. The system supports two modes of signal transmission: high power and low power. It automatically switches according to actual needs to balance signal strength and energy consumption.

[0056] (7) Detecting the cover opening with power on: When the cover opening operation occurs in the device 1# under power on state, the actuator inside the sensor moves and changes the state of the internal contacts, and the sensor 1 immediately detects the cover opening state. At this time, the sensor 1 sends the detected state information to the base station via wireless communication.

[0057] (8) Signal transmission and processing: After receiving the signal from sensor 1, the base station transmits the information to the cover opening and power off monitoring substation. The cover opening and power off monitoring substation analyzes and processes the information according to the preset logic and confirms that the cover opening operation of equipment 1# has occurred.

[0058] (9) Power-off protection: The cover-opening power-off monitoring substation issues a power-off command to control the upper power switch of equipment 1# to perform power-off control and complete the power-off operation of equipment 1#.

[0059] (10) Alarm and record: The cover opening power-off protection system sends out an alarm signal to notify relevant personnel that an illegal cover opening operation has occurred on equipment 1#, and records the detailed information of the incident for subsequent inquiry and analysis.

[0060] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A cover opening power-off protection system with a wireless sensor, characterized in that: It includes a wireless sensor, a wireless acquisition base station and a cover opening and power-off monitoring substation. The wireless sensor collects the equipment's illegal cover opening operation signal with power on in real time, generates an alarm signal and transmits it to the wireless acquisition base station; the wireless acquisition base station is used to collect the alarm signal emitted by the wireless sensor and transmit it to the cover opening and power-off monitoring substation; the cover opening and power-off monitoring substation is connected to the wireless acquisition base station for data reception, processing and power-off control, and displaying a windowed graphical interface on its terminal.

2. The cover opening power-off protection system with wireless sensor according to claim 1, characterized in that: The wireless sensor is mounted on a device cover, and comprises a housing, an internal contact system, a sensor battery and an actuator.

3. The cover opening power-off protection system with wireless sensor according to claim 1, characterized in that: The wireless sensor uses 2.4G wireless communication protocol to send alarm information to the wireless collection base station.

4. The cover opening power-off protection system with wireless sensor according to claim 2, characterized in that: The value range of the sensor battery power threshold is: 0.1Q N ≤Q set ≤0.3Q N In the formula, Q N is the rated capacity of the sensor battery, Q set is the preset battery level threshold.

5. The cover opening power-off protection system with wireless sensor according to claim 1, characterized in that: The value range of the signal strength threshold between the wireless sensor and the wireless acquisition base station is: -80dBm≤RSSI set ≤-60dBm Where, RSSI set It is the preset signal strength threshold. When the signal strength is detected to be lower than the preset threshold, the system will automatically issue a command to increase the signal transmission power.

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