Remote multi-channel off-line communication system

Abstract

The utility model discloses a long-distance multi-channel off-line communication system, and relates to the technical field of communication. The system comprises a vital sign monitoring device, a LoRa base station supporting multi-channel communication, relay equipment and a server, the relay device is in communication connection with the LoRa base station, and the LoRa base station is in communication connection with the server; when the communication distance between the vital sign monitoring device and the LoRa base station is smaller than or equal to a set first upper limit distance, the vital sign monitoring device is in communication connection with the LoRa base station; and when the communication distance between the vital sign monitoring device and the LoRa base station is greater than a first upper limit distance, the vital sign monitoring device is in communication connection with the relay equipment. According to the utility model, a public network does not need to be connected, the safety of data transmission is improved, the real-time performance and the stability of vital sign data in a complex outdoor environment are also improved, and a powerful guarantee is provided for the safety of outdoor training and work.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, in particular to a long-distance multi-channel off-line communication system. Background Art

[0002] During outdoor training and work activities, monitoring the vital signs of outdoor personnel is crucial to ensure their safety. Therefore, outdoor personnel are usually asked to wear vital signs monitoring devices to obtain vital signs data in real time and understand their health status during outdoor training and work.

[0003] In related technologies, vital sign monitoring devices are usually connected to the back end in real time through the public network to transmit key vital sign data for the back end to monitor and process.

[0004] However, vital signs data is relatively private and important information. There is a certain risk of leakage when transmitted through the public network, and data security cannot be guaranteed. Utility Model Content

[0005] In response to the above-mentioned technical problems and defects, the purpose of the utility model is to provide a long-distance multi-channel offline communication system that does not require connection to the public network, thereby improving the security of data transmission and the real-time and stability of vital signs data in complex outdoor environments, providing a strong guarantee for the safety of outdoor training and work.

[0006] To achieve the above-mentioned purpose, the utility model provides a long-distance multi-channel offline communication system, including a vital signs monitoring device, a LoRa base station supporting multi-channel communication, a relay device and a server; the vital signs monitoring device is used to monitor the vital signs data of outdoor personnel, the server is used to collect and process the vital signs data, the relay device is used to receive and send the vital signs data, the relay device is communicatively connected to the LoRa base station, and the LoRa base station is communicatively connected to the server; when the communication distance between the vital signs monitoring device and the LoRa base station is less than or equal to a set first upper limit distance, the vital signs monitoring device is communicatively connected to the LoRa base station; when the communication distance between the vital signs monitoring device and the LoRa base station is greater than the first upper limit distance, the vital signs monitoring device is communicatively connected to the relay device.

[0007] This embodiment uses LoRa base stations and relay devices to build a stable communication network, solving the risk of data leakage in traditional public network transmission. The system can use LoRa technology for offline communication without public network connection, and realize stable transmission of vital signs data through multi-channel communication technology to ensure data security and privacy. At the same time, the design of the system allows the monitoring device to intelligently switch the communication mode when the communication distance and signal strength change, maintain the continuity and stability of data transmission, thereby effectively responding to communication challenges in outdoor environments and providing a safe and reliable guarantee for the life safety of outdoor personnel.

[0008] In some embodiments, when the communication distance between the vital signs monitoring device and the currently connected relay device is greater than a set second upper limit distance, and the communication distance between the vital signs monitoring device and the LoRa base station is greater than the first upper limit distance, the vital signs monitoring device switches to communicate with the relay device whose communication distance is less than the second upper limit distance.

[0009] By adopting this embodiment, the communication flexibility and reliability of the system are further enhanced. In actual applications, the communication distance between the vital signs monitoring device and the currently connected relay device may increase due to the movement of outdoor personnel, exceeding the set second upper limit distance. At this time, if the communication distance between the vital signs monitoring device and the LoRa base station also exceeds the first upper limit distance, the vital signs monitoring device will automatically switch to a relay device with a closer communication distance for communication. This intelligent switching mechanism ensures that the monitoring device can maintain a stable and secure communication connection even in complex and changeable outdoor environments.

[0010] In some embodiments, when the communication signal strength between the vital signs monitoring device and the LoRa base station is less than a set strength threshold, the vital signs monitoring device switches to a communication connection with the relay device.

[0011] This embodiment introduces the monitoring of communication signal strength, which further improves the stability and security of the system. In some cases, even if the physical distance between the vital signs monitoring device and the LoRa base station does not exceed the upper limit, the communication signal strength may drop below the set threshold due to environmental factors or equipment failure. At this time, the vital signs monitoring device can automatically detect the change in signal strength and switch to a closer relay device for communication connection in time to ensure communication strength and avoid the risk of data transmission interruption.

[0012] In some embodiments, the communication interface between the LoRa base station and the server includes at least one of an RS-485 interface, an RS-422 interface, and an RS-232 interface.

[0013] This embodiment enhances the compatibility and flexibility of the system by providing a variety of communication interface options. The communication interfaces between the LoRa base station and the server include RS-485, RS-422, and RS-232, etc. These interface standards are widely used in the fields of industrial and commercial communications, with mature technical support and extensive hardware support. By selecting at least one of the interfaces, the communication system of this embodiment can adapt to different back-end devices and communication environments, improving the applicability and scalability of the system.

[0014] In some embodiments, the long-distance multi-channel offline communication system further includes a power replenishment device, which is used to replenish power for the LoRa base station and the relay device.

[0015] This embodiment solves the problem of continuous power supply of LoRa base stations and relay devices in outdoor environments by introducing power supplement equipment. The power supplement equipment can provide the necessary energy for the system to ensure that the system can operate stably in outdoor environments without conventional power supply.

[0016] In some embodiments, the electric energy supplement device includes at least one of a solar power generation device, a gasoline generator, and a diesel generator.

[0017] This embodiment enhances the adaptability and reliability of the system by providing multiple types of electric energy supplement equipment options. This diverse selection enables the system to select the most appropriate electric energy supplement method according to specific application environments and requirements.

[0018] In some embodiments, the long-distance multi-channel offline communication system further includes a protective cover, in which the relay device is located.

[0019] This embodiment improves the environmental adaptability and durability of the relay device. The protective cover can not only resist adverse weather conditions such as rain, snow, dust and sand, protect the relay device from damage and ensure the stable operation of the communication system, but also prevent accidental impact or physical damage and extend the service life of the device.

[0020] In some embodiments, the vital signs monitoring device also only has a positioning module and a vibration module. The positioning module is used to obtain the location information of the outdoor person, and the vibration module is used to generate vibration when the location of the outdoor person exceeds a specified range.

[0021] This embodiment enhances the functionality and practicality of the system by integrating a positioning module and a vibration module in the vital signs monitoring device. The positioning module can obtain the location information of outdoor personnel in real time, which is essential for monitoring the safety status of personnel and performing emergency rescue. The server obtains the location information of outdoor personnel in real time, and sends a warning message to the vital signs monitoring device when it is detected that the position of the personnel exceeds the specified range, and the vibration module starts to vibrate to remind the outdoor personnel to return to a safe area or take necessary safety measures.

[0022] In some embodiments, heat dissipation holes are formed on the outer wall of the relay device.

[0023] This embodiment improves the heat dissipation efficiency and stability of the device by forming heat dissipation holes on the outer wall of the relay device. In an outdoor environment, the relay device may run for a long time and generate heat. If there is no effective heat dissipation mechanism, the relay device may overheat, affect performance or even cause failure. The design of the heat dissipation holes allows heat to be effectively dissipated through air flow, keeping the relay device running at a suitable temperature.

[0024] In some embodiments, the heat dissipation holes are in a honeycomb shape.

[0025] This embodiment further improves the heat dissipation performance of the relay device by designing the heat dissipation holes in a honeycomb shape. The honeycomb heat dissipation hole structure not only provides a larger heat dissipation area, but also enhances air flow and improves heat dissipation efficiency through its unique geometric shape.

[0026] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages

[0027] 1. LoRa base stations and relay devices are used to build a stable communication network, solving the risk of data leakage in traditional public network transmission. The system can use LoRa technology for offline communication without public network connection, and realize stable transmission of vital signs data through multi-channel communication technology to ensure data security and privacy. At the same time, the system design allows the monitoring device to intelligently switch the communication mode when the communication distance and signal strength change, maintain the continuity and stability of data transmission, thereby effectively responding to communication challenges in outdoor environments and providing a safe and reliable guarantee for the life safety of outdoor personnel.

[0028] 2. Further enhances the communication flexibility and reliability of the system. In actual applications, the communication distance between the vital signs monitoring device and the currently connected relay device may increase due to the movement of outdoor personnel, exceeding the set second upper limit distance. At this time, if the communication distance between the vital signs monitoring device and the LoRa base station also exceeds the first upper limit distance, the vital signs monitoring device will automatically switch to the relay device with a closer communication distance for communication. This intelligent switching mechanism ensures that the monitoring device can maintain a stable and secure communication connection even in complex and changing outdoor environments.

[0029] 3. By integrating the positioning module and the vibration module into the vital signs monitoring device, the functionality and practicality of the system are enhanced. The positioning module can obtain the location information of outdoor personnel in real time, which is essential for monitoring the safety status of personnel and conducting emergency rescue. The server obtains the location information of outdoor personnel in real time. When the location of the person is detected to be out of the specified range, a warning message is sent to the vital signs monitoring device, and the vibration module starts to vibrate to remind outdoor personnel to return to a safe area or take necessary safety measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 It is a schematic diagram of the architecture of a long-distance multi-channel offline communication system according to an embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the connection relationship of an electric energy supplement device in an embodiment of the utility model;

[0033] Figure 3 It is a schematic diagram of the assembly of a protective cover and a relay device in an embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the heat dissipation hole structure of a relay device in an embodiment of the utility model;

[0035] Description of reference numerals:

[0036] 1. Vital signs monitoring device; 2. LoRa base station; 3. Relay equipment; 4. Server; 5. Power supplement equipment; 6. Protective cover; 31. Heat dissipation holes. DETAILED DESCRIPTION

[0037] The terms used in the following embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to be used as limitations on the present invention. As used in the specification and appended claims of the present invention, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include plural expressions, unless the context clearly indicates otherwise. It should also be understood that the term "or" used in the present invention refers to and includes any or all possible combinations of one or more of the listed items. Below, the terms "first" and "second" are used only for descriptive purposes and are used to distinguish technical features, and cannot be understood as implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0038] It should also be noted that, unless otherwise clearly specified and limited, in the embodiments of the present utility model, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The embodiments of the present utility model are described in detail below.

[0039] The present invention provides a long-distance multi-channel offline communication system. Figure 1 As shown, it includes a vital sign monitoring device 1, a LoRa base station 2 supporting multi-channel communication, a relay device 3 and a server 4; the vital sign monitoring device 1 is used to monitor the vital sign data of outdoor personnel, the server 4 is used to collect and process the vital sign data, the relay device 3 is used to receive and send the vital sign data, the relay device 3 is communicatively connected to the LoRa base station 2, and the LoRa base station 2 is communicatively connected to the server 4.

[0040] Wherein, when the communication distance between the vital sign monitoring device 1 and the LoRa base station 2 is less than or equal to the set first upper limit distance, the vital sign monitoring device 1 is connected to the LoRa base station 2 for communication;

[0041] When the communication distance between the vital sign monitoring device 1 and the LoRa base station 2 is greater than the first upper limit distance, the vital sign monitoring device 1 is communicatively connected to the relay device 3 .

[0042] The embodiment of the utility model utilizes LoRa (Long Range Radio) technology to provide a safer and more reliable transmission method for the communication between the vital signs monitoring device 1, the relay device 3 and the base station, and can realize the real-time transmission of vital signs data without connecting to the public network, reducing the risk of information leakage caused by data transmission through the public network, and realizing the function of offline communication without the public network. Among them, LoRa technology has the advantages of low power consumption, long communication distance, strong penetration, etc., and can work stably in complex outdoor environments, thereby ensuring the real-time transmission of vital signs data.

[0043] In addition, the present embodiment introduces a relay device 3, which is used as an intermediary for data transmission when the distance between the vital signs monitoring device 1 and the LoRa base station 2 exceeds the set upper limit, effectively expanding the communication range and ensuring that vital signs data can be monitored and transmitted in real time in a wider area. At the same time, the LoRa base station 2 of the system of the present embodiment also has the ability of multi-channel communication, so that the vital signs monitoring device 1, the LoRa base station 2 and the relay device 3 can communicate on multiple different channels, improving the flexibility and anti-interference ability of the system communication, and further ensuring the stability of data transmission.

[0044] In some embodiments, the vital signs monitoring device 1 includes but is not limited to wearable devices such as smart bracelets, smart helmets, smart rings, smart glasses, etc., which can collect vital signs data such as heart rate, blood pressure, blood oxygen, etc. of outdoor personnel.

[0045] In some embodiments, when the communication distance between the vital signs monitoring device 1 and the currently connected relay device 3 is greater than the set second upper limit distance, and the communication distance between the vital signs monitoring device 1 and the LoRa base station 2 is greater than the first upper limit distance, the vital signs monitoring device 1 switches to communicate with the relay device 3 whose communication distance is less than the second upper limit distance.

[0046] This embodiment further enhances the communication flexibility and reliability of the system. In actual applications, the communication distance between the vital signs monitoring device 1 and the currently connected relay device 3 may increase due to the movement of outdoor personnel, exceeding the set second upper limit distance. At this time, if the communication distance between the vital signs monitoring device 1 and the LoRa base station 2 also exceeds the first upper limit distance, the vital signs monitoring device 1 will automatically switch to the relay device 3 with a closer communication distance for communication. This intelligent switching mechanism ensures that the monitoring device can maintain a stable and secure communication connection even in a complex and changeable outdoor environment. For example, when conducting physical training in the forest, outdoor personnel may move to an area with weaker signal coverage. At this time, the vital signs monitoring device 1 can switch to the nearest relay device 3 in time to ensure the real-time transmission of its vital signs data, so that the server 4 can continuously monitor the status of the rescue personnel and respond in time.

[0047] In some embodiments, when the communication signal strength between the vital sign monitoring device 1 and the LoRa base station 2 is less than a set strength threshold, the vital sign monitoring device 1 switches to a communication connection with the relay device 3 .

[0048] This embodiment introduces the monitoring of communication signal strength, which further improves the stability and security of the system. In some cases, even if the physical distance between the vital signs monitoring device 1 and the LoRa base station 2 does not exceed the upper limit, the communication signal strength may drop below the set threshold due to environmental factors or equipment failure. At this time, the vital signs monitoring device 1 can automatically detect the change in signal strength and promptly switch to the closer relay device 3 for communication connection to ensure communication strength and avoid the risk of data transmission interruption. For example, in alpine rock climbing training, the signal strength may drop suddenly due to terrain obstruction. The monitoring device can quickly identify this change and switch to the relay device 3 to ensure that the climber's vital signs data can be continuously transmitted to the base, providing continuous safety protection for the climber.

[0049] In some embodiments, the communication interface between the LoRa base station 2 and the server 4 includes at least one of an RS-485 interface, an RS-422 interface, and an RS-232 interface.

[0050] This embodiment enhances the compatibility and flexibility of the system by providing a variety of communication interface options. The communication interfaces between the LoRa base station 2 and the server 4 include RS-485, RS-422, and RS-232, etc. These interface standards are widely used in the fields of industrial and commercial communications, with mature technical support and extensive hardware support. By selecting at least one of the interfaces, the communication system of this embodiment can adapt to different back-end devices and communication environments, improving the applicability and scalability of the system.

[0051] In some embodiments, Figure 2 As shown, the system also includes an electric energy supplement device 5, which is used to supplement electric energy for the LoRa base station 2 and the relay device 3.

[0052] This embodiment solves the problem of continuous power supply of LoRa base station 2 and relay device 3 in outdoor environment by introducing power supply device 5. Power supply device 5 can provide necessary energy for the system to ensure that the system can operate stably in outdoor environment without conventional power supply. This is particularly important in remote areas or emergency situations. For example, after a natural disaster, the conventional power supply may be interrupted. At this time, power supply device 5 can ensure the continuous operation of the communication system and provide key communication support for rescue work. For example, in outdoor operations in the desert, the operation team may be far away from the power supply. Power supply device 5 such as solar power generation equipment can provide continuous power for monitoring devices and communication base stations to ensure that the vital signs data of outdoor personnel can be monitored and transmitted in real time.

[0053] In some embodiments, the electric energy supplement device 5 includes at least one of a solar power generation device, a gasoline generator, and a diesel generator.

[0054] This embodiment enhances the adaptability and reliability of the system by providing a variety of types of power supplement equipment 5 to choose from. Solar power generation equipment, gasoline generators, and diesel generators are all common ways of supplementing power, and they each have different characteristics and applicable scenarios. Solar power generation equipment is environmentally friendly and sustainable, and is suitable for environments with sufficient sunshine; while gasoline and diesel generators can provide electricity when there is no sunlight or when a quick start is required. This diverse selection enables the system to select the most appropriate power supplement method based on the specific application environment and needs. For example, in physical training on an island, due to the particularity of the marine environment, a diesel generator may be selected as the main power supplement equipment 5 to ensure the stable operation of the communication system under severe weather conditions.

[0055] In some embodiments, Figure 3 As shown, the long-distance multi-channel offline communication system further includes a protective cover 6 , and the relay device 3 is located in the protective cover 6 .

[0056] This embodiment improves the environmental adaptability and durability of the relay device 3. The protective cover 6 can not only withstand adverse weather conditions, such as rain, snow, dust and sand, protect the relay device 3 from damage, and ensure the stable operation of the communication system, but also prevent accidental impact or physical damage, and extend the service life of the equipment. In addition, the design of the protective cover 6 usually takes into account the heat dissipation requirements of the equipment. Through reasonable ventilation holes and heat dissipation structures, it is ensured that the equipment can maintain a suitable temperature in a continuous working state to avoid performance degradation or damage caused by overheating. The design of this protective cover 6 is particularly important in outdoor applications. It enables the relay device 3 to provide reliable communication support in a changeable outdoor environment, whether in a hot desert, a humid rainforest or a cold mountainous area, it can ensure the smooth flow of the communication link.

[0057] In some embodiments, the vital sign monitoring device 1 also has only a positioning module and a vibration module. The positioning module is used to obtain the location information of the outdoor person, and the vibration module is used to generate vibration when the location of the outdoor person exceeds a specified range.

[0058] This embodiment enhances the functionality and practicality of the system by integrating a positioning module and a vibration module in the vital signs monitoring device 1. The positioning module can obtain the location information of outdoor personnel in real time, which is crucial for monitoring the safety status of personnel and performing emergency rescue. The server 4 obtains the location information of outdoor personnel in real time, and sends a warning message to the vital signs monitoring device 1 when it is monitored that the position of the personnel exceeds the specified range. The vibration module starts to vibrate to remind the outdoor personnel to return to a safe area or take necessary safety measures. This integrated design makes the vital signs monitoring device 1 not only a vital signs monitoring tool, but also a safety monitoring and early warning system. For example, on a construction site, workers may accidentally enter a dangerous area. The combination of the positioning module and the vibration module can promptly remind the workers to pay attention to safety and prevent accidents.

[0059] In some embodiments, Figure 4 As shown, a heat dissipation hole 31 is formed on the outer wall of the relay device 3 .

[0060] This embodiment improves the heat dissipation efficiency and stability of the device by forming heat dissipation holes 31 on the outer wall of the relay device 3. In an outdoor environment, the relay device 3 may run for a long time and generate heat. If there is no effective heat dissipation mechanism, the relay device 3 may overheat, affecting performance or even causing failure. The design of the heat dissipation holes 31 allows heat to be effectively dissipated through air flow, keeping the relay device 3 running at a suitable temperature. This design is crucial to ensuring that the relay device 3 can operate stably under various environmental conditions. For example, in a hot desert environment, the relay device 3 may be affected by high temperatures, and the heat dissipation holes can effectively prevent the device from overheating, ensuring the continuity and reliability of the communication system.

[0061] In some embodiments, the heat dissipation holes 31 are in a honeycomb shape.

[0062] This embodiment further improves the heat dissipation performance of the relay device 3 by designing the heat dissipation holes 31 into a honeycomb shape. The honeycomb heat dissipation hole structure not only provides a larger heat dissipation area, but also enhances air flow and improves heat dissipation efficiency through its unique geometric shape. This design is not only beautiful, but also provides practical functional advantages, so that the relay device 3 can maintain good performance even during long-term operation. For example, in high-altitude areas, heat dissipation becomes more difficult due to the thin air. The honeycomb heat dissipation hole design can effectively improve the heat dissipation efficiency and ensure that the relay device 3 can operate stably under these extreme conditions.

[0063] This embodiment can use LoRa technology for offline communication without public network connection, and realize stable transmission of vital signs data through multi-channel communication technology to ensure data security and privacy. At the same time, the design of the system allows the monitoring device to intelligently switch the communication mode when the communication distance and signal strength change, maintain the continuity and stability of data transmission, thereby effectively responding to communication challenges in outdoor environments and providing a safe and reliable guarantee for the life safety of outdoor personnel.

[0064] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A long-distance multi-channel offline communication system, characterized in that: It includes a vital sign monitoring device, a LoRa base station supporting multi-channel communication, a relay device and a server; the vital sign monitoring device is used to monitor the vital sign data of outdoor personnel, the server is used to collect and process the vital sign data, the relay device is used to receive and send the vital sign data, the relay device is connected to the LoRa base station in communication, and the LoRa base station is connected to the server in communication; When the communication distance between the vital sign monitoring device and the LoRa base station is less than or equal to a set first upper limit distance, the vital sign monitoring device is communicatively connected with the LoRa base station; When the communication distance between the vital sign monitoring device and the LoRa base station is greater than the first upper limit distance, the vital sign monitoring device is communicatively connected to the relay device.

2. The long-distance multi-channel offline communication system according to claim 1, characterized in that: When the communication distance between the vital signs monitoring device and the currently connected relay device is greater than the set second upper limit distance, and the communication distance between the vital signs monitoring device and the LoRa base station is greater than the first upper limit distance, the vital signs monitoring device switches to communicate with the relay device whose communication distance is less than the second upper limit distance.

3. The long-distance multi-channel offline communication system according to claim 1, characterized in that: When the communication signal strength between the vital signs monitoring device and the LoRa base station is less than a set strength threshold, the vital signs monitoring device switches to a communication connection with the relay device.

4. The long-distance multi-channel offline communication system according to claim 1, characterized in that: The communication interface between the LoRa base station and the server includes at least one of an RS-485 interface, an RS-422 interface and an RS-232 interface.

5. The long-distance multi-channel offline communication system according to any one of claims 1 to 4, characterized in that: It also includes an electric energy supplement device, which is used to supplement electric energy for the LoRa base station and the relay device.

6. The long-distance multi-channel offline communication system according to claim 5, characterized in that: The electric energy supplement equipment includes at least one of a solar power generation equipment, a gasoline generator, and a diesel generator.

7. The long-distance multi-channel offline communication system according to claim 1, characterized in that: Also included is a protective cover, in which the relay device is located.

8. The long-distance multi-channel offline communication system according to claim 1, characterized in that: The vital sign monitoring device also only has a positioning module and a vibration module. The positioning module is used to obtain the position information of the outdoor person, and the vibration module is used to generate vibration when the position of the outdoor person exceeds a specified range.

9. The long-distance multi-channel offline communication system according to claim 1, characterized in that: The outer wall of the relay device is formed with heat dissipation holes.

10. The long-distance multi-channel offline communication system according to claim 9, characterized in that: The heat dissipation holes are in a honeycomb shape.

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