Network-free self-positioning emergency help-seeking relay type bidirectional intelligent emergency indication device and control method

Abstract

The invention discloses a network-free self-positioning emergency help-seeking relay control method and a bidirectional guiding device, and belongs to the technical field of fire-fighting emergency lighting, intelligent evacuation indication and wireless emergency communication. The method comprises the following steps: step S101, by using a radio frequency TOF (Time of Flight) distance measurement technology, calculating the relative position between devices by measuring the propagation time difference of a radio frequency signal between the devices, and realizing network-free self-positioning without an external network and a satellite positioning system; step S102, transmitting the distress signal from the position of the trapped person to a rescue worker or an external receiving device step by step through relay transmission between devices by adopting a distributed chained relay mode so as to realize signal transmission in a network-free environment; and step S103, using a bidirectional double-color independent lamp group to respectively and synchronously indicate escape and rescue paths with different colors of light so as to realize bidirectional synchronous guidance. The device integrates a radio frequency ranging module, a signal relay module and a two-color lamp group module, and all the modules work cooperatively to complete the functions of self-positioning, signal relay and two-way guidance. The system has the beneficial effects that the dependence of a traditional system on an external network and satellite positioning is broken through, and self-positioning and distress signal transmission in a full-scene network-free environment are realized; escape and rescue route conflicts are avoided through two-way synchronous guidance, and the rescue efficiency is improved; pairing and debugging are not needed in the whole process, the installation and maintenance cost is reduced, and the system is suitable for emergency escape and personnel search and rescue in complex scenes such as buildings, underground garages, tunnels, mines and field scenic spots.

Description

Technical Field

[0001] The invention relates to the fields of fire emergency lighting, intelligent evacuation guidance, wireless emergency communication, and disaster environment detection technology. Specifically, it relates to an emergency device and control method that does not rely on external networks or satellite positioning systems and can achieve self-positioning without a network, relaying distress signals, and providing two-way dual-color synchronous guidance. It is applicable to emergency escape and personnel search and rescue in all scenarios such as buildings, underground garages, tunnels, mines, and scenic areas. Background Technology

[0002] In the field of fire emergency lighting and intelligent evacuation guidance, existing technologies have the following core defects: 1. Limited Functionality: Existing systems can only provide one-way escape guidance and cannot simultaneously guide rescuers to locate trapped individuals, leading to frequent conflicts between evacuation and rescue routes. For example, in a fire scenario, escapees and rescuers may delay rescue efforts due to overlapping paths. 2. Network Dependence: Current technologies are highly dependent on external networks and satellite positioning systems. During disasters, base stations and network equipment are easily paralyzed, and the lack of satellite signals in indoor and underground environments can lead to overall system failure. 3. Limitations in signal transmission: Lacking distributed relay capabilities, distress signals from trapped personnel cannot be effectively transmitted in environments without a network, making it difficult for rescuers to pinpoint their location. For example, in mine accidents, traditional rescue equipment suffers from signal attenuation, limiting the rescue range. 4. Complex installation and commissioning: Traditional intelligent evacuation systems require professional personnel to manually configure addresses, network, and debug them. The commissioning cycle for large projects can take several days, resulting in extremely high labor costs. For example, commissioning the evacuation system of a large commercial complex requires a significant investment of manpower and resources. 5. Separation of Detection and Guidance: Current technologies cannot achieve precise location of disaster sites and dynamic linkage of evacuation routes, which can easily mislead people into dangerous areas. For example, after an earthquake, when buildings partially collapse, traditional systems cannot update safe routes in real time. Existing technologies cannot form a complete life safety link of "self-positioning networking - disaster detection and early warning - dynamic escape guidance - distress positioning relay - global situational awareness", resulting in serious safety blind spots. Summary of the Invention

[0003] Technical problems to be solved This invention aims to overcome all the shortcomings of existing technologies and provide an emergency indication device and control method that requires no network, satellite positioning, pairing, or debugging, and is adaptable to all scenarios. It achieves self-positioning and networking in offline environments, precise disaster location reporting, SOS distress signal relay, and two-way synchronous guidance for escape and rescue. Simultaneously, it enables dual-use for both daily navigation and emergency life-saving purposes. Technical Solution The core technical solution of this invention is divided into two parts: the method side and the device side. Method side (corresponding to claims 1-4) 1. Network-less self-positioning technology: This technology employs radio frequency (TOF) time-of-flight ranging to calculate relative position by measuring the time difference of radio frequency signals propagating between devices, thus achieving self-positioning in network-less environments. This technology requires no external network or satellite signal, achieves positioning accuracy up to 0.5 meters, and is suitable for complex environments. 2. Distributed chain relay technology: Through relay transmission between devices, distress signals are transmitted step by step from the location of the trapped person to rescuers or external receiving equipment. Each device can act as a relay node, extending the signal coverage area and solving the signal transmission problem in environments without network coverage. 3. Two-way, dual-color synchronous guidance technology: Utilizing independently controlled escape guidance lights (green) and rescue guidance lights (red), this system provides two-way synchronous guidance for both escape and rescue. Escapees follow the green lights, while rescuers use the red lights to locate trapped individuals, avoiding route conflicts. Device side 1. Integrated design: Built-in TOF ranging module, RF communication module, and bidirectional lamp control module, using low-power chips (such as STM32L4 series), supporting battery power supply, with a battery life of up to 72 hours. 2. Dual-use function in peacetime and disaster relief: In normal mode, it acts as an intelligent wayfinding device, guiding people through with green lights; in emergency mode, it automatically switches to a distress signaling device, activating red lights and sending distress signals. 3. Adaptive environmental adjustment: Built-in light and smoke sensors can dynamically adjust the brightness and flashing frequency of the light according to the ambient light intensity and smoke concentration, ensuring clear visibility even in dense smoke or dark environments. Technical features that distinguish it from existing technologies 1. Network-free self-positioning capability: Existing technologies rely on external networks or satellite positioning. This invention achieves fully autonomous positioning through radio frequency TOF technology, breaking through network limitations. 2. Two-way synchronous guidance function: Existing technologies only support one-way guidance. This invention achieves two-way synchronous guidance for escape and rescue through independently controlled dual-color light groups. 3. Distributed relay mechanism: Existing technologies lack signal relay capabilities. This invention extends signal coverage and improves rescue efficiency through relay transmission between devices. 4. Zero-debugging installation design: Existing technologies require professional debugging, while this invention adopts self-organizing network technology. After the device is powered on, it automatically completes networking and positioning without manual intervention. Beneficial technical effects 1. Full-scene adaptability: Applicable to scenarios with no network or unstable network, such as buildings, underground garages, tunnels, mines, and scenic spots, improving emergency response capabilities. 2. High reliability: Through distributed relay and self-location technology, it ensures that distress signals and guidance information can still be effectively transmitted during disasters, reducing the risk of casualties. 3. Low-cost maintenance: Zero-debugging design reduces installation and maintenance costs, while the dual-use functionality improves equipment utilization and reduces total cost of ownership. 4. Dynamic route planning: Escape routes are updated in real time based on disaster locations to prevent people from entering dangerous areas and improve evacuation efficiency. Attached Figure Description Figure 1 A flowchart of the network-free self-positioning emergency rescue relay control method of the present invention; Figure 2 Structural diagram of the bidirectional guidance device of the present invention; Figure 3 Circuit schematic diagram of the radio frequency TOF ranging module of this invention; Figure label: 1. Two-way guidance device; 11. Escape guidance light group; 12. Rescue guidance light group; 13. TOF ranging module; 14. Radio frequency communication module; 15. Main control chip; 16. Power supply module; 111. Green LED beads; 121. Red LED beads; 131. Radio frequency antenna; 132. Time measurement chip. Detailed Implementation Example 1: Complete Implementation Process of Core Technology 1. Implementation of offline self-localization This embodiment uses radio frequency Time-of-Flight (TOF) ranging technology to achieve network-free self-localization. The specific steps are as follows: 1. Signal transmission and reception: Device A transmits a ranging signal through the radio frequency antenna (131), and device B immediately returns a response signal after receiving the signal. 2. Time difference measurement: The time measurement chip (132) of device A records the time difference Δt between signal transmission and reception. The distance d between device A and device B is calculated according to the formula d = c × Δt / 2 (c is the speed of light). 3. Triangulation calculation: Using distance data from at least three devices, the main control chip (15) uses a triangulation algorithm to calculate the relative position of the devices. For example, if the distances between devices A, B, and C are d1, d2, and d3 respectively, the coordinates (x, y) of device A are determined by solving a system of equations. 4. Self-organizing network completed: After each device completes relative positioning through the above process, it automatically builds a networkless self-organizing network to form a positioning system covering the entire area. 2. Implementation of Distributed Chain Relay This embodiment utilizes distributed chain relay technology to achieve network-free transmission of distress signals. The specific steps are as follows: 1. SOS signal initiation: The trapped person triggers the SOS button on the device, and the main control chip (15) generates a distress signal containing location information. 2. Signal relay transmission: Device A sends the distress signal to the nearest device B through the radio frequency communication module (14). After receiving the signal, device B forwards it to device C, forming a chain transmission. 3. Signal Coverage Extension: Each device acts as a relay node, extending the signal coverage area. For example, in an underground parking garage scenario, through the relay of 10 devices, a distress signal can be transmitted from the deepest point to the receiving device at the exit. 4. Location of rescue personnel: After receiving the distress signal, the receiving device locates the location of the trapped personnel by reverse query and activates the rescue guide light group (12) to display red light to guide the rescue personnel to arrive quickly. 3. Two-way, two-color synchronization guidance implemented. This embodiment achieves bidirectional synchronous guidance through independently controlled escape guidance light group (11) and rescue guidance light group (12). The specific steps are as follows: 1. Escape guidance mode: The main control chip (15) calculates the optimal escape route based on the location information and disaster location, and controls the green LED beads (111) of the escape guidance light group (11) to flash in the direction of the route to guide the escaped personnel to evacuate safely. 2. Rescue guidance mode: At the same time, the main control chip (15) controls the red LED beads (121) of the rescue guidance light group (12) to continuously light up at the location of the trapped person, forming a clear positioning mark, which makes it easy for rescuers to quickly locate the person. 3. Dynamic path adjustment: If the location of the disaster changes (such as the spread of fire), the main control chip (15) updates the escape path in real time and adjusts the direction of the light guidance to ensure that people always escape along the safe route. 4. Realization of dual-use functions for peacetime and disaster relief This embodiment achieves dual-use functionality for both peacetime and disaster relief through mode switching. The specific steps are as follows: 1. Daily mode: After the device is powered on, it enters the daily mode by default. The main control chip (15) controls the green LED beads (111) of the escape guidance light group (11) to be constantly lit, so as to guide people through as an intelligent guide device. 2. Emergency mode trigger: When the smoke sensor detects that the smoke concentration exceeds the threshold, or when the main control chip (15) receives an external disaster warning signal, it automatically switches to emergency mode. 3. Emergency mode function: In emergency mode, the main control chip (15) activates the red LED beads (121) of the rescue guide light group (12) and enters the distress signal listening state, ready to send or receive distress signals at any time. Example 2: Modified Implementation of the Technical Solution 1. Multi-band RF communication optimization This embodiment addresses signal interference issues in complex environments by employing multi-band radio frequency communication technology to optimize signal transmission. The specific steps are as follows: 1. Frequency band scanning and selection: The main control chip (15) controls the radio frequency communication module (14) to scan multiple frequency bands such as 2.4GHz and 5GHz, and select the frequency band with the best signal strength for communication. 2. Frequency hopping communication mechanism: During the communication process, if severe interference is detected in the current frequency band, the main control chip (15) will automatically switch to the backup frequency band to ensure the stability of signal transmission. 3. Anti-interference coding techniques: Spread spectrum coding techniques are used to encode the distress signal, improving its anti-interference capability. For example, direct sequence spread spectrum (DSSS) technology is used to extend the signal bandwidth to 10MHz, reducing the impact of interference. 2. Enhanced lighting guidance design This embodiment addresses the guidance needs in dense smoke or dark environments by enhancing the light guidance function. The specific steps are as follows: 1. High-brightness LED beads: High-brightness LED beads (111, 121) with a brightness of up to 10000mcd are selected to ensure clear visibility even in dense smoke. 2. Dynamic flashing frequency: The main control chip (15) dynamically adjusts the flashing frequency of the light according to the ambient light intensity and smoke concentration. For example, in a dense smoke environment, the flashing frequency is increased to 5Hz to enhance the visual impact. 3. Multi-directional guidance design: Multiple sets of LED beads (111, 121) are arranged around the device to achieve 360-degree all-round guidance and prevent people from missing guidance signals due to perspective issues. Example 3: Implementation in a specific application scenario 1. Application in mining scenarios This embodiment adapts the technical solution to meet the specific needs of a mining environment. The specific steps are as follows: 1. Explosion-proof design: The device adopts an explosion-proof enclosure and intrinsically safe circuit design to ensure safe use in flammable and explosive environments such as gas. 2. Long-distance communication optimization: To address the problem of narrow mine tunnels and severe signal attenuation, the number of relay devices is increased, and a high-gain radio frequency antenna (131) is used to improve signal coverage. 3. Improved personnel positioning accuracy: By deploying multiple devices at key nodes in the mine to form a dense positioning network, the personnel positioning accuracy is improved to 0.3 meters, meeting the needs of mine rescue. 2. Application in outdoor scenic areas This embodiment optimizes the technical solution for the unnetworked environment and complex terrain of scenic areas. The specific steps are as follows: 1. Solar power supply design: A solar panel is integrated on the top of the device to charge the power module (16) and improve the device's endurance in the field. 2. Terrain-adaptive guidance: Based on the terrain data of the scenic area (such as the location of mountains and rivers), the main control chip (15) dynamically adjusts the escape route to prevent people from entering dangerous areas. 3. Multilingual voice prompts: A voice prompt module has been added, supporting broadcasts in multiple languages ​​such as Chinese, English, and Japanese, to meet the emergency guidance needs of international tourists. The above embodiments illustrate in detail the technical solution and specific implementation of the present invention. Through core technologies such as network-free self-positioning, distributed relay, and bidirectional dual-color guidance, the invention solves the core defects of the prior art and has significant technical progress and practical value.

Claims

1. A network-free self-positioning emergency rescue relay control method, characterized in that, Includes the following steps: By utilizing radio frequency Time-of-Flight (TOF) ranging technology, wireless self-positioning between devices can be achieved without the need for external networks and satellite positioning systems. A distributed chain relay method is used to transmit distress signals in a wireless environment. Two-way, dual-color independent light groups are employed to provide synchronous two-way guidance for escape and rescue. The method does not rely on any external public networks or satellite systems throughout the entire process, and requires no pairing or debugging, making it suitable for emergency escape and personnel search and rescue in all scenarios.

2. The wireless self-positioning emergency rescue relay control method according to claim 1, characterized in that, The radio frequency TOF time-of-flight ranging technology calculates the relative position between devices by measuring the time difference of radio frequency signals propagating between devices, thereby achieving network-free self-positioning.

3. The wireless self-positioning emergency rescue relay control method according to claim 1, characterized in that, The distributed chain relay method transmits distress signals from the location of the trapped person to rescuers or external receiving equipment through relay transmission between devices, realizing signal transmission in a network-free environment.

4. The network-free self-positioning emergency rescue relay control method according to claim 1, characterized in that, The bidirectional dual-color independent light group includes an escape guidance light group and a rescue guidance light group. The escape guidance light group emits one color of light to guide escapers; the rescue guidance light group emits another color of light to guide rescuers to locate trapped personnel.

5. The wireless self-positioning emergency rescue relay control method according to claim 1, characterized in that, It also includes a disaster precise location and reporting step, which uses an environmental detection module to detect disaster information and reports the disaster location information to other devices or external receiving equipment via a radio frequency module.

6. A bidirectional guiding device, characterized in that, include: It has a built-in radio frequency module with TOF ranging function, which is used to realize self-positioning without network and relaying distress signals; The main control module is used to control the overall operation of the device; The two-way dual-color indicator module includes an escape guidance light group and a rescue guidance light group, which are used to achieve two-way synchronous guidance for escape and rescue. Environmental detection module, used to detect disaster information; All modules are connected via PCB circuitry, and the device features an integrated design with installation dimensions compatible with traditional emergency lights, allowing for direct replacement.

7. The bidirectional guiding device according to claim 6, characterized in that, The radio frequency module includes a radio frequency transmitting unit and a radio frequency receiving unit. The radio frequency transmitting unit is used to transmit radio frequency signals and distress signals, and the radio frequency receiving unit is used to receive radio frequency signals and distress signals transmitted by other devices.

8. The bidirectional guidance device according to claim 6, characterized in that, The escape guidance light group and rescue guidance light group of the bidirectional dual-color indicator module use LED lights of different colors, and the brightness is adjustable to adapt to guidance needs in different environments.

9. The bidirectional guidance device according to claim 6, characterized in that, The environmental detection module includes at least one of a smoke detector, a temperature detector, and a gas detector, used to detect disaster information such as fires and earthquakes, and send the detection results to the main control module.

10. The bidirectional guidance device according to claim 6, characterized in that, It also includes dual-use functions for peacetime and disaster relief. In normal circumstances, it is used as a guide device, and in emergency situations, it automatically switches to an emergency rescue relay control device to achieve two-way synchronous guidance for escape and rescue.

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