Multi-device cooperative global multimode long-endurance emergency system

Abstract

The invention discloses a multi-device cooperative global multi-mode long-endurance emergency system, and belongs to the technical field of emergency safety. The system focuses on a dual-device collaborative architecture, multi-mode communication, multi-stage energy guarantee and intelligent risk assessment technology. The master device integrates a master control module, a multi-mode communication module, an environment sensor group module, an energy management module, an interaction module and the like, and supports a one-dragging-six mode. The system integrates 5G full-band communication and a Beidou independent positioning technology, double-link redundancy of the main device and the wearable device is constructed, and the communication coverage rate is increased from less than 60% to 100%. The beacon module achieves RSSI positioning with the precision smaller than or equal to 5 meters, the near-field search and rescue time is shortened by 40%, the complex terrain positioning efficiency is improved by 50%, the rescue response time is shortened by more than 50%, and the three-break scene requirements are met. The rescue efficiency of remote scenes such as earthquakes, fire disasters, deserts, forests, seaborne and polar regions is remarkably improved, and meanwhile the single-equipment light-weight emergency requirements of scenes such as child monitoring and outdoor exploration are met. The application prospects in the fields of medical treatment, old-age care, camping, chemical engineering and the like are wide.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency safety, and particularly to a multi-device collaborative all-region multi-mode long-endurance emergency system. Background Art

[0002] In the field of emergency safety, traditional emergency safety devices have many defects. In terms of communication, they mostly adopt a single communication mode, such as relying on Bluetooth, 4G, etc. In areas without ground network coverage such as mountains, oceans, and deserts, the devices are extremely likely to lose contact, and cannot transmit key location, personnel vital signs, and environmental risk information in a timely manner. For example, during mountain rescue, due to insufficient 4G signals, the device cannot actively upload accurate location and life data, seriously delaying the rescue time. In terms of monitoring capabilities, traditional devices can usually only collect some physiological data of personnel (such as heart rate, blood oxygen) or a single environmental parameter (such as temperature, air pressure), lacking the detection ability for important environmental risk factors such as toxic gases (such as CO) and combustible gases (such as liquefied gas), and cannot issue early warnings in dangerous scenarios such as industrial leaks, fires, and closed camping tents, making it difficult to ensure personnel safety.

[0003] In terms of energy supply, traditional devices mostly use ordinary lithium batteries for power supply. In low-temperature environments (< -20°C), the battery capacity will drop by more than 50%, and there is no backup power supply or energy recovery device, resulting in poor battery life of the device. Usually, the battery life is < 24 hours. In extreme scenarios, the device is very likely to lose its function due to power exhaustion. If the beacon is equipped with a power supply, it is mostly an ordinary battery with short battery life and cannot continue to work when the main power supply of the device is exhausted, affecting the development of rescue operations. In terms of the wake-up mechanism, traditional devices rely on button triggering or high-power continuous listening (current > 10 μA), cannot respond to environmental anomalies after shutdown, the emergency response delay > 500 ms, the button battery has a short battery life, and it is difficult to meet the long-term standby requirements. Existing beacons cannot be externally triggered and activated in the shutdown state of the device, delaying the rescue process.

[0004] In addition, most traditional emergency safety devices adopt a single-device independent working mode, lacking two-way linkage between devices. The beacon function cannot be integrated into the device interaction system. The communication, energy, and monitoring modules operate independently and do not form a synergy, making it difficult to achieve a closed-loop of "active monitoring - intelligent decision-making - emergency response - active exposure - data reference" in extreme scenarios (low temperature, high humidity, no network). Limited by the hardware integration degree and power consumption balance, traditional devices are difficult to simultaneously meet the requirements of "low-power standby", "multi-mode communication", and "full-dimensional monitoring", seriously restricting the efficiency and effect of emergency rescue work. Therefore, a multi-device collaborative all-region multi-mode long-endurance emergency system is proposed. Summary of the Invention

[0005] In view of this, the present invention provides a multi-device collaborative all-region multi-mode long-endurance emergency system to solve or alleviate the technical problems existing in the prior art. The present invention meets the core indicators such as "communication coverage rate ≥ 95%" and "beacon independent operation time ≥ 72 hours" in the "Technical Requirements for Emergency Communication Equipment in Three Disconnection Scenarios" (GB17681-2024) of the Ministry of Emergency Management. The communication coverage rate reaches 100%, and the beacon independent operation time ≥ 720 hours. At least one beneficial option is provided.

[0006] The technical solution of the present invention is realized as follows: The multi-device collaborative all-region multi-mode long-endurance emergency system adopts a dual-device collaborative architecture of a main device (portable base station) and a wearable device (including but not limited to: wristband, helmet, vest, gloves and other protective gears or wearable utensils), and is equipped with an independent anti-destruction beacon module. The main device integrates a main control module, a multi-mode communication module, an environmental sensor group, an energy management module, etc.; the wearable device integrates a vital sign sensor, an interaction module and a short-range communication module; the anti-destruction beacon module has an anti-destruction shell, an independent energy source and a multi-mode signal transmitter. The main device (portable base station): integrates a main control module, a multi-mode communication module, an environmental sensor group, an energy management module, and an interaction module, and supports a 1-to-6 mode (simultaneously accessing 6 sets of wearable devices); the anti-destruction beacon module: has an anti-destruction shell, an independent energy source and a multi-mode signal transmitter, and operates independently after the main device is damaged. The anti-destruction beacon module is only activated when the main device is permanently damaged, providing long-endurance long-distance signals; the wearable beacon relays satellite signals when the main device fails temporarily, and the two form a redundant positioning system with complementary timing. The main device and the wearable device adopt a dual-link communication redundancy design, based on the traditional satellite / LoRa / beacon network; 5G communication channel: The main device integrates an industrial-grade 5G RedCap module, supports all operator frequency bands and dual functions of data / voice, and serves as a backup link for LoRa and satellite communication; the wearable device is built-in with a Beidou-3 positioning chip and an independent 5G module. When the main device fails or is separated, it can independently complete satellite positioning and 5G network alarm. The main device adopts a full-band 5G module (supporting RedCap mode), and the wearable device adopts a RedCap module, taking into account the balance between performance and power consumption, realizing the "single-device emergency" ability, and meeting the needs of lightweight scenarios such as child custody and elderly living alone. Dual-device 5G+Beidou redundancy process: Such as Figure 13As shown, when the master device is normal, the 5G module of the wearable device enters eDRX sleep (power consumption ≤ 0.05 mW), wakes up every 10 minutes for 10 ms to scan neighboring cells, and at the same time, the Beidou module is synchronously awakened to obtain positioning data (time consumption ≤ 15 seconds, power consumption ≤ 8 mW); after the master device fails, within 3 seconds after the master device fails, the 5G module of the wearable device is activated, and the 5G neighboring cell list is scanned every 5 seconds (supporting n1 / n3 / n5 / n8 / n28 / n41 / n78 frequency bands): if RSRP ≥ -100 dBm, start the '5G communication + Beidou positioning parallel mode'; if RSRP is between -110 dBm and -100 dBm, synchronously activate the LoRa self-organizing network module to transmit data in parallel with 5G; if RSRP < -110 dBm, switch to the Beidou short message mode. Beidou updates the positioning coordinates every 10 minutes and transmits a 100-byte alarm packet containing compressed life data (ZSTD compression ratio 3:1) through 5G transmission to ensure the real-time nature of location information; if the 5G signal is insufficient for 3 consecutive scans, activate the Beidou short message module to send a 100-byte alarm packet containing compressed life data (ZSTD compression ratio 3:1), and send positioning data once every 30 minutes. Form a loop of 'positioning - encryption - 5G transmission' to send alarm packets (format: SOS|ID|coordinates|life data).

[0007] Wearable device: Integrates vital sign sensors, interaction sensors, and short-range communication modules to achieve close monitoring and convenient interaction; Real-time Clock (RTC) module (synchronized by Beidou time service (accuracy ± 0.5 seconds / day)) and multiple groups of alarm clocks include an emergency alarm mode (85 dB buzzer + four-direction vibration, vibration intensity ≥ 2 m / s2), which is automatically triggered when the red priority (0x04) is reached;

[0008] The beacon module of the wearable device integrates a miniaturized satellite frequency band receiving unit (including a Digital Down-Converter (DDC) module, volume ≤ 2 cm 3 , power consumption ≤ 10 mW), uses a dedicated Low Noise Amplifier (LNA) to receive the 121.5 MHz VHF high-frequency signal and convert it into a baseband signal, and analyzes satellite protocol data through Digital Down-Converter (DDC) technology and an FSK demodulation chip to extract positioning information and rescue priority encoding. The satellite frequency band receiving unit automatically switches to the relay mode after the master device loses connection, and forwards the received satellite rescue signal (including timestamp, Doppler shift) in the 2.4 GHz / 433 MHz signal format to ensure that the rescue personnel terminal can obtain satellite-level positioning information through near-field communication.

[0009] The wearable device continuously monitors the beacon signal of the master device at a frequency of 5 seconds / time. If the signal is not received for 30 consecutive seconds, it is determined that the master device has failed, and it automatically switches to the satellite relay mode.

[0010] Further preferably, the communication module: satellite communication: Beidou short message (100-byte two-way encrypted transmission, 10 emergency templates pre-stored), Starlink 4G / satellite dual-mode (automatic switching, 4G is preferred when the signal ≥ -100dBm).

[0011] Medium-range self-organizing network: LoRa module (spreading factor SF12 + coding rate 4 / 5, penetration loss model = 40.3 + 20log(d) + 20log(f) - Gt - Gr, 433MHz frequency band, 20km line-of-sight transmission, self-organizing network of 200+ devices). The medium-range self-organizing network unit (LoRa) uses the AES-128 encryption algorithm to perform end-to-end encryption on the transmitted data. The encryption key is dynamically generated by the master device and the rescue device through the Diffie-Hellman key exchange protocol and is automatically updated every 10 minutes. The communication data frame contains a 128-bit unique device identification code (UUID), follows the ISO / IEC9834-8 standard, and contains metadata such as device type, belonging group, geographical area, etc. The rescue platform can quickly filter out invalid signals through this code, and the positioning efficiency is increased by 60%.

[0012] Near-field beacon: 2.4GHz / 433MHz dual-frequency beacon, supporting RSSI positioning with an accuracy of ≤ 5 meters, 1 master and 6 slaves mode, real-time broadcasting of position, vital signs, and 5-level rescue priority coding (0x00 - 0x04), compliant with the COSPAS-SARSAT protocol (121.5MHz VHF beacon, satellite capture within 15 minutes).

[0013] Beacon independent operation: Connect to the master device and the wearable device through magnetic coupling and other methods and strong reinforcement protection processing. It is built with a lithium thionyl chloride battery (500mAh) + ≥ 10F super capacitor, and continues to work for ≥ 30 days after the master device and the wearable device are damaged, sending multi-mode signals containing priority coding.

[0014] Communication mode switching threshold: When the 4G signal strength < -100dBm, Beidou short message and LoRa are automatically enabled; the rule engine is trained based on 1000 groups of historical data, the parameter weights are optimized by the XGBoost algorithm, and the time window is set to 2 minutes.

[0015] Multi-device collaborative positioning mechanism: When the master device is not damaged, the rescue device receives the signals of the master device (long-range beacon) and the wearable device (near-field beacon) simultaneously. Through the RSSI signal strength of ≥ 3 rescue devices, the three-dimensional triangulation algorithm is used to calculate the position, with an accuracy of ≤ 3 meters (open area); after the master device is damaged, it is positioned only through the beacon signal of the wearable device, with an accuracy of ≤ 5 meters (complex terrain). The algorithm formula is:

[0016]

[0017] Among them, A is the signal strength at 1 meter (-65 dBm), and ni is the environmental attenuation factor (2.0 in open areas and 4.0 in ruins).

[0018] The three-dimensional triangulation algorithm is applicable to multiple scenarios such as open areas, ruins, and forests. By fusing the signals of the main device's long-range beacon and the wearable device's near-field beacon, hierarchical positioning is achieved. In open areas, the three-dimensional coordinates are solved by using the RSSI signal strengths received by ≥3 rescue devices through the maximum likelihood estimation method; in complex terrains, the multi-path signals are monitored in real time through the UWB ultra-wideband module (operating frequency band 3.1 - 10.6 GHz). When ≥3 independent paths are detected, the UWB ranging data (accuracy ≤0.1 m) and the beacon signals are automatically fused, and the coordinates are solved through the Kalman filtering algorithm. The filtering gain matrix Q = 0.1I, the observation noise matrix R = 0.05I, and the positioning error ≤2 m (standard deviation ≤1.2 m), reducing the positioning error in complex terrains by 40%. The UWB module is usually in the sleep state (power consumption ≤0.5 mW), and is only awakened when ≥3 multi-path signals are detected (active state power consumption ≤15 mW). The single ranging time ≤20 ms, and it immediately returns to the sleep state after completing the fusion calculation. In multi-occlusion scenarios such as tunnels and ruins, after the UWB module is fused with the Beidou positioning data, the positioning accuracy can be improved to ≤1.5 m. When the attenuation of the beacon signal ≥20 dB is detected, the UWB enhancement mode is automatically triggered, and a multi-path scan is performed every 5 seconds until the signal returns to stability.

[0019] The rescue device receives the RSSI signals of the main device (long-range beacon) and the wearable device (near-field beacon), and calculates the distance through the above formula. When the main device is normal, the main beacon (2.4 GHz) and the wearable beacon (433 MHz) form a frequency division duplex (FDD) mode. The main beacon carries the position reference data, and the wearable beacon transmits the vital signs; after the main device fails, the wearable beacon automatically switches to the full-band broadcast mode, compatible with the 121.5 MHz VHF satellite signal relay, realizing cross-band positioning coordination. The positioning error of the traditional single device is 10 - 30 m. Through the fusion of the two-device beacons in this solution, the positioning accuracy in open areas is improved to ≤3 m (error standard deviation ≤1.5 m), and in complex terrains ≤5 m (error standard deviation ≤2.8 m), and the positioning efficiency is increased by 50% - 83% compared with the traditional solution.

[0020] Further preferably, referring to Figure 6 , the four-level energy guarantee system

[0021] Main power layer: 40000 mAh ultra-low temperature lithium battery (capacity 90% at -50 °C), supporting fast charging (charged to 80% in 2 hours), and equipped with an automatic start heating component at -25 °C.

[0022] Standby layer: Supercapacitor cluster (133 - hour battery life after main power failure) + Independent wake - up power supply (low - power button battery + supercapacitor, ≥730 - day low - power monitoring, 5μA power consumption).

[0023] Recycling layer: Solar charging module (4000 mAh per day on average), vibration power generation sheet (30 mW ± 5% when walking), thermoelectric power generation sheet (15 mW ± 5% when ΔT = 10℃). And when all energy is completely exhausted, energy can be replenished in time by adjusting temperature difference and shaking the device, giving priority to powering low - power modules;

[0024] External layer: 40000 mAh magnetic - adsorption mobile power supply (supporting wireless charging and wired fast charging), providing two - way power supply for the main device and wearable devices.

[0025] Independent energy path for wearable devices: 1000 mAh lithium thionyl chloride battery + supercapacitor + vibration / thermoelectric power generation. After the main power is exhausted, it automatically switches to renewable energy. Vibration power generation (30 mW when walking) gives priority to ensuring the sleep state of the 5G module (≤0.1 mW) and the wake - up state of Beidou (≤5 mW), ensuring that the net power consumption is ≥10 mW when the two links are in parallel. When the power generation power < 15 mW, the Beidou wake - up frequency is automatically reduced to once every 30 minutes (power consumption ≤2 mW), giving priority to maintaining 5G communication. When the vibration / thermoelectric power generation power ≥25 mW, the system automatically increases the Beidou wake - up frequency to once every 5 minutes (power consumption ≤8 mW) to improve the real - time positioning. When the supercapacitor charge < 20%, non - critical functions (such as voice broadcast) are automatically cut off, and only beacon broadcasting (≤1 mW) is retained. When the vibration power generation power < 10 mW and the thermoelectric power generation power < 5 mW, it is determined as the 'energy critical state', and the system automatically enters the low - frequency rescue mode: the Beidou wake - up frequency is reduced to once every 60 minutes (power consumption ≤1 mW), and the beacon broadcast frequency is reduced to 1 Hz, only transmitting key vital signs data (heart rate, body temperature) and Beidou coordinates. And when all energy is completely exhausted, energy can be replenished in time by adjusting temperature difference and shaking the device, ensuring the lowest power consumption operation of the beacon module (≤1 mW). In a static scenario (insufficient vibration power generation), thermoelectric power generation (ΔT≥5℃) gives priority to powering the beacon module (≤1 mW). When ΔT < 5℃, the supercapacitor (10F) takes over the power supply, and the beacon broadcast frequency automatically drops to 1 Hz to reduce energy consumption.

[0026] In the fully - shut - down state, the residual voltage of the main device ≤80 mV, standby current < 0.01 μA, and that of the wearable device < 0.005 μA.

[0027] Further preferably, two - dimensional monitoring and linkage warning

[0028] Vital sign monitoring (wearable device): Heart rate (±1BPM, sampling rate of 50Hz), body temperature (±0.1°C), fall status (acceleration > 8g for 2s), blood oxygen (error ≤ 3%).

[0029] Environmental risk monitoring (main device): Air pressure (±1m altitude), combustible gas (0 - 10000ppm), toxic gas such as CO (0 - 2000ppm), temperature (-55°C to 125°C, ±0.1°C), vibration and shock (six-axis inertial sensor).

[0030] Data fusion and early warning: At 0:00 every day, the SGP30 reference sensor is introduced into pure air for 30 seconds, and the baseline voltage is recorded to the EEPROM to calibrate the gas sensor, with a drift rate ≤ 5%; the monitoring data and beacon location information are packed and encrypted (AES-128), and transmitted via Beidou short message / LoRa. The rescue platform generates a "risk heat map + personnel status priority". Whether it is a near-field beacon (2.4GHz / 433MHz) or a medium-range self-organizing network (LoRa), the signal carries the unique device identification code (UUID). This code is burned into the EEPROM when the device leaves the factory, including 32-bit manufacturer code + 64-bit random sequence + 32-bit check code to ensure global uniqueness. After receiving the signal, the rescue platform can parse the device identity, historical trajectory and risk level within 3 seconds, realizing precise scheduling in the scenario of multi-device networking.

[0031] Further preferably, the wearable device wakes up the main device: It supports voice (5 keywords such as "Help" "SOS", wake-up rate ≥ 90% at -40°C), gesture (waving / fisting, recognition rate with gloves ≥ 75%), abnormal life (heart rate > 140BPM for 30 seconds) or button trigger, and wakes up within 300 meters through the nRF24L01+ transmitter (+20dBm power), with a delay ≤ 50ms. The microprocessor module of the wearable device writes instructions to the wireless wake-up module through the SPI2 interface, and the low-power controller of the main device detects the signal through the interrupt pin, with a hardware wake-up delay ≤ 50ms. This process involves the configuration of 3 hardware registers, and none of them can be missing.

[0032] The main device wakes up the wearable device: When an environmental anomaly (gas exceeding the standard, air pressure dropping suddenly > 10hPa / minute) is detected, a wake-up signal containing the risk type code is sent through the enhanced transmitter. The independent power supply of the wearable device is activated within 100ms, and it returns data and triggers vibration / voice alarm. The microprocessor module of the main device writes instructions to the wireless wake-up module through the SPI2 interface, and the low-power controller of the wearable device detects the signal through the interrupt pin, with a hardware wake-up delay ≤ 50ms. This process involves the configuration of 3 hardware registers, and none of them can be missing.

[0033] Further preferably, a spatio-temporal correlation rule engine: construct more than 50 composite risk rules (such as "body temperature < 35°C + CO > 500 ppm + static ≥ 300 seconds" triggers a red warning), calibrate sensor noise through moving average filtering (window size 10), and reduce the false alarm rate from about 15% to 0.03%.

[0034] Five-level priority encoding (0x00 - 0x04):

[0035] Red (0x04): heart rate > 140 BPM + body temperature < 35°C + fall / CO > 1000 ppm, give priority to dispatching drones + robots, response time ≤ 5 minutes, and increase the beacon broadcast frequency to 50 Hz.

[0036] Orange (0x03): heart rate > 120 BPM / body temperature > 39°C / combustible gas > 5000 ppm, dispatch the nearest rescue team (radius ≤ 500 meters), and add an escape direction guide.

[0037] Yellow (0x02): sudden air pressure drop > 10 hPa / minute + personnel static ≥ 300 seconds, start LoRa networking, and mark the risk area.

[0038] Blue (0x01): body temperature < 35°C / > 38°C (no other abnormalities), the wearable device vibrates to remind, and the main device sends a text message warning.

[0039] Green (0x00): parameters are normal, and the beacon broadcasts regularly at 10 Hz.

[0040] Dynamic rescue path planning: Based on the Dijkstra algorithm, combined with priority encoding and attitude sensor data (to avoid obstacles), generate three rescue routes for drones, robots, and on foot.

[0041] Further preferably, industrial-grade protection: the main device is IP68 (2-meter anti-drop, 1.5-meter water depth for 30 minutes), and the wearable device passes the GJB150A-2009 test (operates at -55°C to 85°C).

[0042] Interaction optimization: four-direction vibration motor (left vibration = west, right vibration = east) + 85 dB voice broadcast, the escape path recognition rate in dark / thick smoke scenarios ≥ 92%; the gesture recognition rate with 5 mm gloves ≥ 75%, and the voice wake-up rate at -40°C ≥ 90%.

[0043] Further preferably, dual-path upgrade: satellite link (Beidou / Starlink) supports segmented transmission (100 bytes per single packet, resume transmission from breakpoint), and LoRa self-networking realizes regional batch upgrade.

[0044] Security verification: CRC32 verification + AES-128 decryption + RSA2048-bit digital signature to prevent malicious tampering, support for emergency patches (completed in 5 minutes) and full upgrades (downloaded in the background and executed in the foreground queue).

[0045] Core quantitative index comparison table:

[0046]

[0047] Due to the adoption of the above technical solutions in the embodiments of the present invention, it has the following advantages:

[0048] The present invention integrates a variety of communication technologies to build a four-level communication network, solves the problem of traditional devices being out of network and losing contact, and improves the communication coverage rate from <60% to 100%. The beacon module realizes RSSI positioning with an accuracy of ≤5 meters, reduces the near-field search and rescue time by ≥40%, improves the positioning efficiency in complex terrains by ≥50%, and shortens the rescue response time by more than 50%. The VHF beacon (121.5 MHz) complies with the COSPAS-SARSAT protocol, and the success rate of lost contact positioning is ≥92% globally, especially improving the rescue efficiency in remote scenarios such as earthquakes, fires, deserts, crossings, forest fire prevention, the sea, and the polar regions, and will also have excellent performance in fields such as medical care, elderly care, anti-loss, camping, and chemical engineering.

[0049] The main device and the wearable device achieve deep collaboration through clear functional division of labor. The specific comparison is as follows:

[0050]

[0051]

[0052]

[0053]

[0054] Through the above division of labor, the main device and the wearable device form an emergency safety system with dual-dimensional monitoring of "environment-life" and complementary communication of "long-distance - near-field", solving the limitation of the single function of traditional devices.

[0055] 1. For example, it supports multi-device networking in forest fire prevention scenarios (more than 200 beacons for collaborative positioning). During maritime rescue, it is linked with satellites such as COSPAS-SARSAT through VHF beacons, and the positioning success rate is ≥92%.

[0056] II. The four - level energy guarantee system of the present invention enables the main device to have a low - temperature endurance of ≥160 hours, which is more than 7 times higher than that of traditional devices, supports continuous field operation for more than 6 days, and covers the complete golden rescue period (72 hours). The beacon module has an independent energy source to support operation for more than 30 days after the main device is damaged, solving the defect that traditional beacons rely on the main power supply and can only work for ≤48 hours. The power consumption of the main device in shutdown monitoring is 5 μA, and the wearable device has a deep - sleep power consumption of 0.5 μA, which is reduced by more than 50% compared with traditional devices, and the frequency of manual inspections is reduced by more than 80%. The vibration / thermal - difference power generation technology replenishes energy consumption in real - time, reduces the dependence on lithium batteries, and realizes "theoretically infinite endurance without external power supply".

[0057] III. 12 types of sensors in the present invention (4 types of vital signs + 8 types of environmental parameters) collect data in real - time. Through the spatio - temporal correlation rule engine, more than 50 composite risk rules are constructed. The false - alarm rate is reduced from about 15% of the traditional solution to 0.03%, the missed - alarm rate is <0.1%, and the early - warning accuracy in complex scenarios is increased by 99.8%. The gas sensor is equipped with a reference calibration module to compensate for the high - temperature drift rate ≤5%, and the risk - identification accuracy in industrial scenarios is increased by more than 3 times. The beacon signal carries a 5 - level rescue priority code, driving the Dijkstra algorithm to optimize the rescue path, with the efficiency improved by more than 30% compared with traditional manual scheduling, and the path - planning time of rescue robots / drones shortened by 60%.

[0058] IV. The main device of the present invention has an IP68 protection (2 - meter anti - drop + 1.5 - meter water depth for 30 minutes), and the wearable device passes the GJB150A - 2009 test (-55°C to 85°C operation), adapting to extreme environments such as polar regions, deep seas, and high - temperature industrial boilers. The equipment failure rate is reduced by 70% compared with the traditional solution, and the service life is extended by more than 2 times. The anti - destruction beacon module has a titanium - alloy shell (anti - 1.5 - meter drop) + potting waterproof design, and can still continuously send signals after the main device is damaged, solving the problem of "device failure leads to disconnection" in scenarios such as earthquake ruins and mine collapses. Offline voice wake - up (5 keywords, wake - up rate ≥90% at - 40°C) + glove - wearing gesture recognition (75%), the operation success rate in wet / slippery / noise scenarios is increased to 88%, and the efficiency is increased by 60% compared with the traditional button - pressing method. The four - direction vibration motor combined with voice broadcast guides the escape direction, and the escape - path recognition rate in dark / smoky scenarios reaches 92%, reducing the risk of secondary injuries caused by information loss for personnel.

[0059] V. The main device and the wearable device of the present invention are deeply linked and complementary in function. The overall weight of the device is reduced by 40% compared with the single - device solution, and the function coverage rate is increased by 150%. The magnetic charging contact supports two - way charging for the main device and the wearable device, reducing the overall energy consumption by 25% and increasing the endurance synergy gain by 15%. The system takes into account both daily functions and emergency scenarios, reducing the equipment idle rate by 60%. Firmware updates are realized without dead - angles through satellite / self - networking, increasing the device function iteration efficiency by 80% and reducing the maintenance cost by 60%.

[0060] VI. The response rate of the present invention within the golden rescue time (4 minutes) is increased to 95%, and the casualty rate in complex scenarios is expected to be reduced by more than 45%.

[0061] The above summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0063] Figure 1 It is a schematic diagram of the overall architecture of the system of the present invention;

[0064] Figure 2 It is a flowchart of daily monitoring and data interaction of the present invention;

[0065] Figure 3 It is a flowchart of emergency alarm of the present invention;

[0066] Figure 4 It is a flowchart of two-way wake-up mechanism of the present invention;

[0067] Figure 5 It is a flowchart of multi-mode communication switching of the present invention;

[0068] Figure 6 It is a flowchart of sensor calibration and false alarm filtering of the present invention;

[0069] Figure 7 It is a flowchart of four-level energy guarantee of the present invention;

[0070] Figure 8 It is a flowchart of state transition and power supply path power management during shutdown of the present invention;

[0071] Figure 9 It is a main device energy flowchart of the present invention;

[0072] Figure 10 It is a wearable device beacon function energy flowchart of the present invention;

[0073] Figure 11 It is a multi-device collaborative positioning flowchart of the present invention;

[0074] Figure 12This is the flow chart of dual-device dual-frequency collaboration of the present invention;

[0075] Figure 13 This is the flow chart of 5G+Beidou redundant communication of dual-devices of the present invention;

[0076] Figure 14 This is the overall architecture and logic diagram of the dual-device system of the present invention. Specific Embodiments

[0077] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary in nature rather than restrictive.

[0078] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0079] As Figure 1-14 shown, the embodiments of the present invention provide a multi-device collaborative all-region multi-mode long-endurance emergency system, including a main device (portable base station)

[0080] Main control and processing module:

[0081] Core chip: Cortex-M7 dual-core processor (480MHz) + ultra-low-power controller (deep sleep 0.5μA), responsible for multi-module coordination, data fusion, and energy management.

[0082] Storage unit: 128MB SPI Flash (firmware / historical data) + 64KB EEPROM (user configuration / calibration parameters).

[0083] Timing unit: Beidou timing module (UTC time synchronization, ±0.5 seconds / day).

[0084] Remote upgrade interface: Support receiving upgrade packages through satellite / ground communication, differential format transmission (compression ratio ≥ 3:1), CRC32 check + AES-128 decryption + RSA signature verification.

[0085] In one embodiment, the sensor module:

[0086] Environmental sensors: high-precision barometric pressure sensor (±1m altitude), wide-temperature temperature sensor (-55°C to 125°C, ±0.1°C), combustible gas / CO sensor (industrial-grade detection), six-axis inertial sensor (fall detection, static error ≤ 0.5°).

[0087] Communication Module Expansion: Integrate an industrial-grade 5G RedCap module, supporting SA / NSA dual-mode and full-band (n1 / n3 / n5 / n8 / n28 / n41 / n78) communication. When the main device is normal, the 5G module of the wearable device enters the eDRX sleep mode (power consumption ≤ 0.05 mW), wakes up every 10 minutes for 10 ms to scan neighboring cells; after the main device fails, the 5G module is activated to the independent working mode within 3 seconds (activation state power consumption ≤ 200 mW). At the same time, the Beidou multi-frequency positioning chip wakes up once every 10 minutes (power consumption ≤ 8 mW, time-consuming ≤ 15 seconds), transmits the positioning data to the 5G module through the UART interface, forming a 'Beidou positioning - data encryption - 5G transmission' loop process, and sends an alarm packet with ZSTD compression (compression ratio 3:1, format: SOS|ID|coordinates|life data). When the main device fails and the 5G signal is insufficient (RSRP < -110 dBm), the Beidou short message module automatically takes over the communication, sends the positioning data once every 30 minutes, and at the same time the 5G module enters deep sleep (power consumption ≤ 0.01 mW), only retaining the signal scanning thread.

[0088] In one embodiment, the communication module:

[0089] Satellite communication: Beidou short message module + Starlink dual-mode module (supporting 1080p video transmission).

[0090] Terrestrial communication: such as: LoRa module (spreading factor SF12 + coding rate 4 / 5, penetration loss model = 40.3 + 20log(d) + 20log(f) - Gt - Gr, 20 km line of sight, 200+ device self-organizing network) + BLE5.0 (100-meter transmission, dynamically adjusting the connection interval).

[0091] Beacon module: Independent magnetic coupling design, dual-frequency transmitter (2.4 GHz / 433 MHz), supporting the COSPAS-SARSAT protocol, positioning accuracy ≤ 5 meters.

[0092] In one embodiment, the energy module:

[0093] Main power supply: 40000 mAh ultra-low temperature lithium battery, supporting fast charging and low-temperature heating.

[0094] Backup power supply: 40F super capacitor (200 ms seamless switching) + independent wake-up power supply (730-day low-power monitoring).

[0095] Renewable energy: Solar panel + vibration / thermoelectric power generation sheet, preferentially powered by the MPPT controller.

[0096] External power supply: Magnetic adsorption mobile power supply (40000 mAh), supporting wireless / wired fast charging.

[0097] In one embodiment, the interaction module:

[0098] Input device: 12-key silicone keyboard (IP67, glove operation supported) + four-way navigation key + OK confirmation multifunctional key.

[0099] Output device: three-color LED (200cd / m 2 ) + 85dB buzzer + segment LCD screen (-50°C to 85°C, response time ≤ 200ms).

[0100] Charging interface: magnetic contact (IP68, ±0.5mm tolerance) + Type-C (PD3.0 fast charging).

[0101] In one embodiment, the structure and protection: composite material shell (IP68), resistant to 2-meter drop, waterproof for 30 minutes at 1.5-meter water depth; PCB board sprayed with three-proof paint (salt spray resistance for 1000 hours), aluminum heat sink for temperature control.

[0102] In one embodiment, the main control and sensor module:

[0103] Core chip: Cortex-M4 low-power processor (64MHz), responsible for vital sign collection and Bluetooth communication.

[0104] Vital sensor: MAX30101 heart rate and blood oxygen sensor (50Hz sampling) + DS18B20 micro temperature sensor (±0.1°C).

[0105] Interaction sensor: gesture recognition sensor (5 non-contact gestures, recognition rate with gloves ≥ 75%) + six-axis inertial sensor (fall detection threshold > 8g for 2s).

[0106] In one embodiment, the interaction and wake-up module:

[0107] Voice module: offline voice wake-up component (5 keywords, listening power consumption of 5μA, wake-up rate ≥ 95% at -40°C, improving low-temperature reliability through built-in temperature compensation algorithm (based on BLE temperature sensor data)).

[0108] Independent emergency unit: equipped with a Beidou low-power chip (supporting PPP precise positioning, accuracy ≤ 1m, sleep power consumption ≤ 0.5mW, wake-up state power consumption ≤ 20mW) and a 5G RedCap module (supporting eDRX sleep / activation dual mode, activation state power consumption ≤ 80mW). After the main device fails, the 5G module automatically scans the entire frequency band (scan interval of 5 seconds), preferentially selects a cell with RSRP ≥ -100dBm for registration. If three consecutive scans fail, it switches to Beidou short message to send an encrypted alarm signal with a 5-level priority (AES-128 encryption, data volume ≤ 200 bytes).

[0109] RTC Clock Module: Powered by an independent button battery (50 mAh), with a battery life of ≥ 365 days after the main device shuts down.

[0110] Feedback Component: Linear vibration motor (50 ms response, 5 mW power consumption) + segment display (-50°C to 85°C) + emergency alarm clock (trigger delay ≤ 80 ms). For example, it supports 5 offline commands such as 'Help', 'SOS', 'Evacuate East'. A long vibration is defined as 1 second, a short vibration is 0.3 seconds, the vibration interval in four directions is 0.5 seconds, and the buzzer sounds at 85 dB.

[0111] When the emergency alarm button is triggered, the wearable device immediately sends a red-priority alarm signal (including the device's unique identification code UUID and the alarm type) to the main device, and at the same time activates the four-direction vibration motor (vibration intensity ≥ 85 dB) and the red LED to flash (frequency ≥ 2 Hz). The alarm signal is transmitted through AES-128 encryption to ensure anti-interference.

[0112] In one embodiment, the energy module:

[0113] Main power supply: 1000 mAh lithium thionyl chloride battery (self-discharge rate < 0.5% / year at -55°C, battery life of 66 hours).

[0114] Backup energy: Supercapacitor + button battery (shutdown monitoring ≥ 133 hours, 5 μA power consumption).

[0115] Renewable energy: Micro vibration / thermoelectric power generation chip (reducing the dependence on the main battery by 20%).

[0116] Charging method: Magnetic interface (5V / 1A) + wireless charging (5W).

[0117] In one embodiment, the structure and protection: Polyimide flexible PCB (resistant to 100,000 bends), IP67 such as a medical silicone wristband (wrist circumference adjustable from 120 - 220 mm), a recess for the body temperature sensor (error ≤ 0.3 mm).

[0118] In one embodiment, inside the main device:

[0119] Main control and sensors: Connected by I2C / SPI bus, the analog signal is converted to a digital signal by ADC (sampling rate of 10 Hz).

[0120] Main control and communication: The UART interface is connected to the satellite module, the SPI interface controls the ground communication module, and the beacon module triggers the wake-up signal through a dedicated pin.

[0121] Energy and modules: The power switch tube switches the main power / backup power supply (seamless switching in 200 ms), and the renewable energy is charged through the MPPT controller (priority: solar energy > external power supply > main battery).

[0122] Inside the wearable device:

[0123] Main controller and sensors: The vital sign sensors are connected via the I2C interface, and the attitude data is transmitted via the SPI interface.

[0124] Main controller and interaction: The GPIO pins drive the vibration motor and the display screen, and the independent ADC channel collects voice signals (sampling rate of 44.1 kHz).

[0125] Beacon transmission module: Transmission power +13 dBm, coverage range ≥ 150 meters, supports frequency hopping spread spectrum in the 2.4 GHz band.

[0126] Energy management: Main battery, super capacitor, vibration / thermal difference. The beacon transmission module (+13 dBm power) is directly coupled with the thermoelectric power generation chip / vibration power generation chip. After the main power is exhausted, it automatically switches to the super capacitor (≥ 10F) for power supply. After the super capacitor is exhausted, the button battery maintains the low-frequency broadcast (1 Hz). The energy switching delay ≤ 200 ms. In an environment of -50°C, after the main power of the wearable device is exhausted, vibration power generation (30 mW ± 5% during walking) can support the beacon operation for ≥ 72 hours, and thermoelectric power generation extends it to ≥ 96 hours. In the case of sustainable movement and temperature difference, it can theoretically have infinite battery life.

[0127] Main controller and communication: The wearable device is built with a low-power dedicated signal processing chip, integrated with a DDC down-conversion module (delay ≤ 100 ms, supports L1 / L2 / L5 multi-frequency down-conversion) and an FSK demodulation module (sensitivity ≤ -120 dBm, supports COSPAS-SARSAT / SOS protocol demodulation), and is interconnected with the Beidou positioning chip through the SPI2 interface to synchronously process satellite positioning signals and emergency beacon signals to ensure the real-time parsing of satellite signals. The SPI2 interface uses differential signal transmission (±500 mV swing) and is equipped with a 100 nF decoupling capacitor to reduce the impact of electromagnetic interference (EMI) on the clock signal and ensure that the data transmission error rate ≤ 10 -9 .

[0128] Control the 2.4 GHz / 433 MHz beacon module (complies with the IEEE802.15.4 standard) through the SPI1 interface, and add a satellite - near-field fusion communication unit, including:

[0129] 121.5 MHz VHF receiving antenna (gain ≥ 3 dBi, half-power beam width ≥ 120°, covers a search and rescue range of ±60°);

[0130] Dedicated demodulation chip (supports FSK demodulation of the COSPAS-SARSAT protocol, sensitivity ≤ -120 dBm, demodulation error rate ≤ 10 -5 );

[0131] A digital signal processor (DSP) is interconnected with a 5G RedCap module through a PCIe interface to achieve protocol conversion between satellite signals (121.5 MHz) and near-field signals (2.4 GHz / 433 MHz) (such as converting an SOS alarm packet from a satellite format to a ZigBee format).

[0132] A forwarding power control circuit (supporting adjustable power from 0 dBm to 20 dBm with a step of 1 dB) ensures that the intensity of the 2.4 GHz / 433 MHz forwarded signal meets the IEEE802.15.4 standard (receive sensitivity ≤ -95 dBm), forming a dual-redundancy link with the 5G module for "5G, satellite long-distance alarm + near-field short-distance search and rescue".

[0133] Master device and wearable device:

[0134] Data interaction: BLE5.0 synchronizes life data in real time (normal interval of 200 ms, high frequency of 20 ms during alarm), and the beacon module transmits wake-up instructions (reliably received within 300 meters).

[0135] Energy interaction: The master device charges the wearable device through magnetic contact or wireless charging, and the renewable energy of the wearable device only powers its own low-power modules.

[0136] When this invention is working: Daily monitoring process:

[0137] Wearable device: Collects vital signs at 1 Hz and synchronizes them to the master device through BLE every 200 ms; supports gesture / voice wake-up listening (power consumption of 5 μA).

[0138] Master device: Collects environmental parameters every 10 seconds, and the LoRa module (spreading factor SF12 + coding rate 4 / 5, penetration loss model = 40.3 + 20log(d) + 20log(f) - Gt - Gr) broadcasts the device status at 10 Hz. When the 4G signal is good (signal ≥ -100 dBm), it uploads to the platform. When the signal is weak, it switches to Beidou short message, and the renewable energy replenishes the energy consumption in real time.

[0139] Emergency alarm process (taking CO leakage as an example):

[0140] Trigger condition: CO sensor > 500 ppm + device stationary ≥ 300 seconds (detected by a six-axis inertial sensor).

[0141] Response process: The master device generates an alarm instruction → wakes up the wearable device within 50 ms → sends the location and escape direction → the wearable device vibrates to alarm and transmits life data back → multi-channel transmission through Beidou short message / LoRa / beacon → the beacon broadcast frequency is increased to 50 Hz → drone / robot scheduling ≤ 5 minutes.

[0142] Within 0.5 seconds after receiving the alarm signal, the master device fuses environmental data (such as CO concentration, air pressure) and vital sign data (such as heart rate, body temperature) through the spatio-temporal correlation rule engine. If it is a manual alarm (with the highest priority), it immediately calls the Beidou short message module to send an emergency rescue request, and at the same time activates the high-frequency flashing of the three-color LED (frequency ≥ 5Hz) and the buzzer (sound intensity ≥ 105dB); if it is an environmental alarm, it schedules corresponding rescue resources according to the risk level (such as red / orange).

[0143] Independent alarm scenario: When the wearable device is disconnected from the master device and in an area without a master device, the following process is triggered: The Beidou module wakes up every 10 minutes to obtain coordinates (time-consuming ≤ 15 seconds, power consumption ≤ 8mW); the 5G module scans the entire operator frequency band and selects a network with a signal strength ≥ -100dBm to send an alarm packet (time-consuming ≤ 5 seconds, power consumption ≤ 20mW); the vibration power generation chip continuously supplies power to ensure infinite battery life for the cyclic process (net gain ≥ 10mW when walking).

[0144] Two-way wake-up process:

[0145] Vital sign anomaly wake-up (wearable → master device): Heart rate > 140BPM for 30 seconds → Send encrypted instruction → The master device wakes up in 50ms → Activate the Beidou + LoRa dual-link alarm, and the rescue platform marks the red priority level.

[0146] Environmental anomaly wake-up (master device → wearable): Sudden air pressure drop > 10hPa / minute + vibration impact → Send warning signal → The wearable device is activated in 100ms → Vibration guides the escape direction and transmits attitude data back.

[0147] Earthquake ruins scenario simulation: Three rescue devices (spaced about 50 meters apart) receive the beacon signal of the wearable device, and use the three-dimensional triangulation algorithm to calculate the coordinates. The average positioning error ≤ 4.2 meters, which is an improvement of ≥ 52% compared to the traditional solution. When the master device is working properly, combined with the beacon signal of the master device, the positioning error can be reduced to ≤ 2.8 meters.

[0148] Energy switching process (main power failure scenario):

[0149] Detection and switching: The power management chip monitors that the main battery voltage < 3.0V → switches to the super capacitor in 200ms → gives priority to ensuring Beidou communication and wake-up functions. After the main power is exhausted, it preferentially switches to thermoelectric power generation (15mW when ΔT ≥ 5℃) or vibration power generation (20mW when ≥ 1Hz), and switches to the super capacitor (≥ 10F, battery life ≥ 133 hours at -50℃) when insufficient → button battery (power consumption 5μA, battery life 2 years); the energy switching delay ≤ 200ms to ensure that the beacon signal is not interrupted.

[0150] Energy replenishment: After the external power supply is adsorbed, it preferentially charges the super capacitor and then restores the main battery to ensure the continuous operation of the core functions.

[0151] Remote firmware upgrade process:

[0152] Upgrade trigger: The rescue platform / local management terminal sends an instruction → Beidou short message / LoRa broadcast → The main device receives and temporarily stores the upgrade package (128MB SPI Flash cache).

[0153] Security verification: CRC32 verification + AES-128 decryption + RSA signature verification → Synchronously update the firmware of the wearable device through the I2C bus → Back up key parameters to the EEPROM → After the upgrade is successful, the beacon broadcasts a green code and the wearable device vibrates to prompt.

[0154] Performance indicators for cross-module collaboration: Dual-device wake-up latency ≤ 300ms; Multi-mode communication switching latency ≤ 300ms (manual switching or no switching in the traditional solution); False alarm rate of the composite risk rule 0.03% (false alarm rate of the traditional single sensor is about 15%).

[0155] In the LoRa communication scenario, the wearable device synchronizes life data to the main device every 200ms through BLE5.0. The main device packages the data with its own environmental monitoring data, adds the unique device identification code (UUID), and then sends it to the rescue platform through LoRa. The data encryption process is as follows: First, generate a message digest through the SHA-256 algorithm, and then encrypt it using the AES-128-CBC mode. The IV vector is generated by the main device in real time and transmitted with the data packet to ensure the security of the communication link. After receiving the data, the rescue platform indexes the device file through the UUID, combines the three-dimensional triangulation result, generates a risk heat map containing the device type, and the scheduling efficiency is increased by more than 3%.

[0156] Collaborative working process of satellite frequency band and near-field communication:

[0157] Normal state of the main device: The main device sends a synchronization frame containing the UTC timestamp through 121.5MHz VHF. The frame structure includes: [frame header|device ID|UTC time|position reference|CRC check]. After the wearable device receives it, it adjusts its own 2.4GHz beacon emission parameters to ensure signal phase synchronization with the main device; The rescue device calculates the three-dimensional positioning coordinates (accuracy ≤ 3 meters) through the time difference between receiving the 121.5MHz signal of the main device and the 2.4GHz signal of the wearable device.

[0158] Master device out-of-contact status: The wearable device detects that the signal of the master device is interrupted (no synchronization frame is received for 30 consecutive seconds); it automatically switches to the relay mode, receives the 121.5 MHz alarm signal sent by the COSPAS-SARSAT satellite; fuses the position information (latitude, longitude, altitude) in the satellite signal with its own vital sign data (heart rate, blood oxygen); broadcasts a rescue data packet in the format of [SOS|Satellite position|Vital signs|Device ID] through 2.4 GHz / 433 MHz, ensuring that rescue personnel can receive it within 500 meters.

[0159] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. Multi-device collaborative all-region multi-mode long-endurance emergency system, characterized in that: It includes a master device, an integrated microprocessor module, a multi-mode communication module (supporting satellite / self-organizing network / cellular communication), a wake-up control module, an environmental sensor group, an energy management module, and an interaction module, supporting the 1+6 mode; a damage-resistant beacon module with a damage-resistant housing, an independent energy source, and a multi-mode signal transmitter; a wearable device integrated with a low-power microcontroller module, a vital sign acquisition module (heart rate / body temperature monitoring), an interaction sensor, an independent beacon transmission module, and a renewable energy management module, which is in two-way linkage with the master device. The master device and the wearable device form a master-slave cooperation through the SPI / I2C bus and the 2.4GHz beacon module. Among them, the clock frequency of the SPI interface is 10MHz, the transmission rate of the I2C interface is 400kHz, supporting the time-division multiplexing mechanism of 1+6 devices, and the bus load capacity is ≥8 slave nodes; the bus adopts electromagnetic shielding design and AES-128 encryption transmission protocol, the signal is verified by CRC-16, and has a hot plug protection function (ESD protection level ±8kV, automatically cuts off the power when disconnected), ensuring that the instruction transmission error rate ≤10 -6 . The master device beacon carries position reference and environmental parameters, and the wearable beacon transmits vital signs. After the signals of both are fused, the positioning accuracy is ≤3 meters; when the master device fails or its own battery runs out, thermoelectric / vibration power generation is used to preferentially ensure the beacon function; the master device and the wearable device achieve two-way hardware-level wake-up through a dedicated wake-up module. The anti-destruction beacon module continuously sends multi-mode signals containing position and 5-level rescue priority codes after the master device fails. The main control module fuses multi-sensor data through a spatio-temporal association rule engine for risk classification and intelligent decision-making. The anti-destruction beacon module uses a titanium alloy shell and has an IP68 protection level (resistant to a 1.5-meter drop and 30 minutes at a depth of 1.5 meters). The potting waterproof design ensures that it can continue to work for ≥720 hours after the master device is damaged. Both the master device and the wearable device are integrated with industrial-grade 5G communication modules (supporting the full frequency band and the RedCap lightweight mode), supporting all domestic operator networks (n1 / n3 / n5 / n8 / n28 / n41 / n78) and the SA / NSA dual mode, achieving ≥250 kbps data transmission and VoNR voice communication; the wearable device is integrated with a Beidou multi-frequency positioning chip, supporting PPP precise point positioning (accuracy ≤1 meter). When the master device fails, it independently sends encrypted alarm signals containing position and vital signs through the 5G network or Beidou short message. When the 5G signal strength is between -110 dBm and -100 dBm, the 5G and LoRa parallel transmission mode is started. Using frequency division multiplexing (FDM) technology, 5G occupies the high-frequency band (2.4 GHz - 5 GHz) to transmit real-time vital sign data, and LoRa occupies the 433 MHz frequency band to transmit environmental data, and the Beidou module maintains positioning backup; when the signal strength < -110 dBm, it automatically switches to the Beidou short message module, and the switching delay ≤3 seconds. This process is controlled by the microprocessor module through a real-time signal monitoring algorithm; the master device and the wearable device achieve two-way hardware-level wake-up through a wireless wake-up module (wake-up delay ≤300 ms), and the multi-mode communication module supports dynamic switching of communication modes (switching delay ≤300 ms). The wireless wake-up module includes a 2.4 GHz wireless transceiver unit and an SPI interface controller, and communicates with the microprocessor module through the SPI interface (clock frequency 10 MHz). The SPI / I2C bus adopts electromagnetic shielding design and AES-128 encryption transmission protocol, and the bus signals are verified by CRC-16 to ensure that the instruction transmission error rate ≤10 -6 , the absence of this module will cause the dual-device wake-up function to fail. The wireless wake-up module includes a backup battery (capacity 50mAh) independent of the main device power supply, communicates with the low-power controller of the wearable device through the SPI interface (clock frequency 10MHz), and when the main device power supply fails, it can still send ≥3 wake-up instructions through this module (interval 5 seconds, power consumption ≤5mW / time); when the 5G signal strength between the main device and the wearable device is ≥-100dBm, it fuses the Beidou positioning data with the beacon signals of the main device and the wearable device, and uses the three-dimensional triangulation algorithm to calculate the position, with an accuracy ≤3 meters; and transmits the positioning data and vital signs in real time through the 5G network; the Beidou module is in a low-power wake-up state (≤5mW) during 5G communication, and updates the coordinates every 10 minutes; if the 5G signal < -100dBm, it automatically synchronizes and activates the switch to the Beidou short message mode, and only continuously obtains PPP precise positioning data through Beidou to achieve independent positioning (accuracy ≤1 meter).

2. The multi-device collaborative all-region multi-mode long-endurance emergency system according to claim 1, wherein: The master device and the wearable device support a dual-shutdown mode: Normal shutdown: The main power is disconnected, and the wake-up circuit is retained (power consumption of the master device ≤ 1.2 μA, wearable device ≤ 0.05 μA), supporting sensor timing pre-detection (waking up for 10 ms every 20 seconds). When an anomaly is detected (such as vibration > 8 g or gas exceeding the standard), the main system is automatically woken up. Full shutdown: The main power supply and the backup energy storage are physically disconnected through a relay, with power consumption < 0.01 μA (master device) / < 0.005 μA (wearable device). Only the independent backup battery powers the key circuit. It is necessary to long-press the master device for 3 seconds / wearable device for 2 seconds to trigger startup. The multi-mode communication module includes: a satellite communication unit, which includes a Beidou short message module (100-byte two-way encrypted transmission) and a Starlink 4G / satellite dual-mode module (automatically switches between the terrestrial network and the satellite link); a medium-range ad-hoc network unit, which uses LoRa (spreading factor SF12 + coding rate 4 / 5, penetration loss model = 40.3 + 20log(d) + 20log(f) - Gt - Gr) technology to achieve 20 km line-of-sight transmission and self-networking of 200+ devices. The LoRa communication between the master device and the wearable device uses a custom AES-128 encryption protocol, and the data transmission rate is ≥250 kbps; a near-field beacon unit, where both the master device and the wearable device beacon support satellite bands (such as 121.5 MHz VHF) and 2.4 GHz / 433 MHz dual-band communication, enabling 5-meter precision RSSI positioning and a 1 master 6 slave mode. The signal complies with the COSPAS-SARSAT protocol and satellite capture within 15 minutes. Near-field / terrestrial communication unit: A new full-band 5G RedCap module is added, supporting VoNR voice and data communication, compatible with China Mobile, China Unicom, and China Telecom networks. The master device and the wearable device support the 5G D2D direct connection mode, with a communication distance ≤500 meters, used for near-field data synchronization (such as real-time transmission of vital signs). When directly connected, AES-128-GCM encryption is used, with a delay ≤20 ms and a bit error rate ≤10 -6 ; The master device and the wearable device achieve direct connection (D2D mode) and base station relay communication through this module. When the master device is normal, the rescue device realizes positioning with an accuracy of ≤3 meters through the signal fusion of the master beacon and the wearable beacon; after the master device fails, it realizes positioning with an accuracy of ≤5 meters only through the wearable beacon signal, and the beacon broadcast frequency is increased to 50Hz to enhance the capture efficiency. The near-field beacon unit supports the wearable device as a slave node to broadcast signals. Wearable device exclusive positioning unit: Integrates a Beidou multi-frequency chip, supports independent positioning (accuracy ≤1 meter) in a base station-free scenario, and transmits the position information back through the 5G network or Beidou short message. The communication signal of the medium-range self-organizing network unit (LoRa) adopts the AES-128 encryption algorithm, and the encryption key is dynamically negotiated and generated with the master device and the wearable device, and is updated every 10 minutes; the communication data contains the device unique identification code (UUID), which is composed of a 128-bit random sequence and is used for the rescue platform to quickly identify the device identity and networking topology, and the coding rule complies with the ISO / IEC9834-8 standard; when the master device transmits the beacon signal through the medium-range self-organizing network (LoRa), it synchronously carries the device unique identification code (UUID) and the 5-level rescue priority code, and the signal adopts AES-128 encryption + CRC32 check to ensure that the rescue platform completes device identification and positioning analysis within 3 seconds; The wearable device has an independent operation mode: monitors the 2.4GHz beacon signal of the master device at a frequency of 5 seconds / time. When the signal is not detected continuously for 6 times (30 seconds), it is determined that the master device signal is interrupted, and the Beidou positioning module and the 5G communication module are automatically activated. The active power consumption of the 5G module is ≤80mW, the wake-up power consumption of the Beidou positioning module is ≤20mW, and the total power consumption of a single 'positioning - transmission' cycle is ≤100mW. Vibration power generation (30mW when walking) is distributed to the 5G module (21mW) and the Beidou module (9mW) in a 7:3 ratio, supporting a cycle of every 30 seconds (net power consumption ≥10mW); thermoelectric power generation (25mW when ΔT≥5℃) is distributed to the beacon module (20mW) and the backup energy storage (5mW) in an 8:2 ratio, supporting a cycle of every 1 minute (net power consumption ≥5mW). Adopts a "positioning - encryption - transmission" cycle process, sends alarm data once every 30 seconds (format: SOS|device ID|Beidou coordinates|heart rate|body temperature), with a power consumption of ≤100mW, and realizes theoretically infinite battery life through vibration / thermoelectric power generation technology. The dynamic switching is based on the XGBoost algorithm. The input parameters include signal strength, packet error rate, and terrain features detected by a six-axis inertial sensor. The output is a communication mode priority queue, with a switching decision delay ≤ 200 ms, and the efficiency is increased by 30% compared to traditional threshold control.

3. The multi-device collaborative all-region multi-mode long-endurance emergency system according to claim 1, characterized in that: The four-level energy guarantee system includes: Main power layer: A 40,000 mAh ultra-low-temperature lithium battery (capacity at -50 °C is 90%), equipped with a low-temperature heating component; Backup layer: A supercapacitor cluster (133-hour battery life after main power failure) + an independent wake-up power supply (730-day low-power monitoring, 5 μA power consumption); Recycling layer: A solar charging component (daily charging of 4000 mAh under 1000 lux illumination), a vibration power generation sheet (30 mW ± 5% during walking), and a thermoelectric power generation sheet (15 mW ± 5% when ΔT = 10 °C), supplementing 30%-60% of the energy consumption. The priority of solar / vibration / thermoelectric power generation is: vibration power generation (prioritizing dynamic environments) > thermoelectric power generation (static environments), automatically switched through an MPPT controller to ensure continuous power supply to low-power modules. The energy interaction between the master device and the wearable device only supports unidirectional power supply from the master device to the wearable device. The renewable energy path of the wearable device is independent and only used for its own beacon module, and reverse power supply to the master device is prohibited. The emergency alarm function of the wearable device is powered by an independent supercapacitor (≥ 10 F). The capacity retention rate of the lithium battery in the main power layer is ≥ 80% at -50 °C. The supercapacitor in the backup layer (capacity retention rate ≥ 70% at -50 °C) automatically takes over power supply after the main power fails, and preferentially powers the Beidou short message module (power consumption ≤ 5 mW) and the wake-up circuit to ensure continuous operation of the beacon function after the master device fails and uninterrupted communication for ≥ 133 hours. External layer: A 40,000 mAh magnetic mobile power supply, supporting wireless charging and wired fast charging. The wearable device is equipped with an independent RTC clock module powered by a button battery, with a battery life ≥ 365 days after the master device shuts down; Optimization of the renewable energy path of the wearable device: Vibration power generation (≥ 30 mW during walking) and thermoelectric power generation (≥ 25 mW when ΔT ≥ 5 °C) preferentially ensure the sleep state of the 5G module (≤ 0.1 mW) and the wake-up state of Beidou positioning (≤ 5 mW), ensuring theoretically infinite battery life (dynamic scenarios) in the independent mode. When both vibration / thermoelectric power generation are insufficient, it automatically switches to supercapacitor power supply (≥ 10 F, battery life ≥ 133 hours at -50 °C), and finally the button battery maintains low-frequency broadcasting (1 Hz, power consumption ≤ 0.5 mW).

4. The multi-device collaborative global multi-mode long-endurance emergency system according to claim 1, characterized in that: The environmental sensor group includes: a high-precision barometric pressure sensor (±1 m altitude), a combustible gas sensor (0 - 10,000 ppm), a CO sensor (0 - 2,000 ppm), a wide-temperature range temperature sensor (-55°C to 125°C, ±0.1°C), and a six-axis inertial sensor (industrial grade, range ±16 g, used to detect environmental vibration impacts (such as earthquakes and collapses)); the vital sign sensor includes a heart rate and blood oxygen sensor (sampling at 50 Hz, ±1 BPM) and a micro temperature sensor (±0.1°C).

5. The multi-device collaborative global multi-mode long-range emergency system according to claim 1, wherein: Applied to the system described in claim 1, when the 5G signal is available, the Beidou positioning module serves as a backup link, and the positioning data is fused with the beacon signal with an accuracy of ≤3 meters; if the 5G signal is interrupted, it automatically switches to the Beidou short message mode, and independent positioning is achieved only through the Beidou positioning data (accuracy ≤1 meter). The short-range beacon uses a three-dimensional triangulation algorithm and automatically enables UWB ultra-wideband assisted positioning in complex terrain or multi-path signal scenarios, fusing the beacon signals of the master device and the wearable device, with a positioning accuracy of ≤3 meters; if ≥3 multi-path signals are detected, the accuracy is improved to ≤2 meters after fusing the UWB data. The formula for the three-dimensional triangulation algorithm is: Among them, A is the signal strength at a reference distance of 1 meter (-65 dBm), RSSI is the measured signal strength, and (ni) is the environmental attenuation factor (ni = 2.0 in open areas, ni = 4.0 in ruins). The hardware-level two-way wake-up mechanism includes: the wearable device triggers the master device through voice (5 keywords, wake-up rate ≥ 90% at -40°C), gesture (recognition rate of 75% when wearing gloves), abnormal life or button, and sends a wake-up instruction encrypted with AES-128 through an enhanced transmitter (+20 dBm power), and the wake-up delay within 300 meters is ≤ 50 ms; when the master device detects environmental abnormalities, it sends a wake-up signal with a risk type code encrypted with AES-128 through (+20 dBm power), and the wearable device receives it through an independent hardware interface, activates and returns data within 100 ms to ensure the anti-interference of cross-device wake-up; after the master device is damaged, the wearable beacon forms a triangular positioning network with ≥ 3 rescue devices by broadcasting a 121.5 MHz VHF signal, and uses the maximum likelihood estimation method to solve the coordinates; in complex terrains, the UWB ultra-wideband module (operating frequency band 3.1 - 10.6 GHz) monitors multi-path signals in real time. When ≥ 3 independent paths are detected, it automatically fuses the UWB ranging data (accuracy ≤ 0.1 meter) with the beacon signal, and solves the coordinates through the Kalman filter algorithm, and the positioning error is ≤ 2 meters (standard deviation ≤ 1.2 meters). The UWB module is usually in a sleep state (power consumption ≤ 0.5 mW), and is only woken up when ≥ 3 multi-path signals are detected (active state power consumption ≤ 15 mW), the single ranging time is ≤ 20 ms, and it immediately returns to the sleep state after completing the fusion calculation. In multi-occlusion scenarios such as tunnels and ruins, after the UWB module is fused with the Beidou positioning data, the positioning accuracy can be improved to ≤ 1.5 meters. When the attenuation of the beacon signal is detected to be ≥ 20 dB, the UWB enhanced mode is automatically triggered, and multi-path scanning is performed every 5 seconds until the signal returns to stability.

6. The multi-device collaborative global multi-mode long-endurance emergency system according to claim 1, characterized in that: When the battery of the wearable device runs out of power, it preferentially powers the beacon module through a thermoelectric power generation chip (outputting 15 mW when ΔT≥5°C) or a vibration power generation chip (outputting 20 mW when the vibration frequency≥1 Hz) to ensure the lowest power consumption operation of the beacon module (≤1 mW); the beacon signal includes vital sign data, main device cached environment data, and a 5-level rescue priority code (0x00 - 0x04), supporting ≥3 rescue devices to calculate the position through a three-dimensional triangulation algorithm. When the main device fails, the positioning accuracy is ≤5 meters. Combining with the automatically enabled UWB fusion positioning, the accuracy is improved to ≤2 meters. The beacon alarm data is encrypted in the AES-128-GCM mode (providing integrity verification), and the IV vector is generated in real time by the Beidou module, supporting 10 pre-stored emergency templates, and the template call delay is ≤50 ms to ensure a quick response in emergency scenarios. Data compression uses the ZSTD algorithm (compression ratio≥3:1), and the format is [SOS|device ID|UTC time|Beidou coordinates (WGS84)|heart rate|body temperature|compression flag], with a total length of ≤200 bytes. The beacon signal also includes a unique device identification code for the rescue platform to quickly identify the anti-destruction beacon module and the wearable beacon module to form a gradient positioning network. The positioning accuracy of the anti-destruction beacon module is ≤5 meters, and it uses a titanium alloy shell with an IP68 protection level (resistant to a 1.5-meter drop and 1.5-meter water depth for 30 minutes). The potting waterproof design ensures continuous operation for ≥30 days after the main device is damaged. It is connected to the main device by means of magnetic coupling, etc., and is built-in with a lithium thionyl chloride battery (500 mAh)+≥10F super capacitor, and can operate independently for ≥30 days after the main device is damaged. The transmitted signal includes satellite positioning information, international rescue frequency band signal, and a 5-level rescue priority code (0x00 - 0x04). The wearable device beacon module (positioning accuracy≤5 meters), the anti-destruction beacon of the main device and the wearable beacon are positioned in coordination. When the main device is not damaged, the rescue device simultaneously receives the signals of the main device (long-distance beacon) and the wearable device (near-field beacon), and calculates the position through the RSSI signal strength of ≥3 rescue devices using a three-dimensional triangulation algorithm, with an accuracy of ≤3 meters (in open areas); after the main device is damaged, it is only positioned through the wearable device beacon signal, with an accuracy of ≤5 meters (in complex terrains). The wearable beacon and the anti-destruction beacon of the main device form a gradient positioning network. The wearable device beacon module supports satellite frequency bands (such as 121.5 MHz VHF) and dual-band communication of 2.4 GHz / 433 MHz. The specific working mode is as follows: The wearable device is built-in with a dedicated signal processing chip, integrating a DDC module (delay≤100 ms) and an FSK demodulation chip (sensitivity≤-120 dBm), and can complete the full process of satellite signal reception and forwarding within 200 ms. The wearable device detects the main device signal frequency once every 5 seconds, and the signal interruption threshold is 30 seconds. Synchronization mode: When the master device is operating normally, the wearable device receives the synchronization instructions (including UTC timestamp and position reference data) sent by the master device through the satellite frequency band, and adjusts its own 2.4GHz / 433MHz beacon parameters (including transmission power, frequency offset, and beacon broadcast period) based on the synchronization instructions to achieve signal phase synchronization and positioning reference calibration with the master device; Relay mode: When the master device fails or the signal is interrupted, the wearable device automatically switches to the satellite frequency band reception (sensitivity ≤ -120dBm) mode, analyzes the 121.5MHz distress signal (including Doppler frequency shift and positioning solution results) relayed by the COSPAS-SARSAT satellite (delay ≤ 200ms), and converts the satellite signal into a broadcast format in the 2.4GHz / 433MHz frequency band (format: (SOS|satellite position|vital signs|device ID)) through a digital signal processor (DSP), and forwards it to the near-field rescue device with a power consumption of ≤ 1mW. The coverage range of the forwarded signal is ≥ 500 meters, ensuring that the wearable beacon relays the satellite signal through FSK demodulation after the master device fails, and the positioning accuracy is ≤ 5 meters (in complex terrain), so that the positioning function can still be maintained through cross-band relaying.

7. The multi-device collaborative all-region multi-mode long-endurance emergency system according to claim 1, characterized in that: The main control module constructs a seven-layer architecture of "perception layer - transmission layer - processing layer - application layer", constructs more than 50 composite risk rules through a spatio-temporal association rule engine, with a false alarm rate of 0.03%, and generates a dynamic rescue path with obstacle avoidance based on the Dijkstra algorithm.

8. The multi-device collaborative all-region multi-mode long-endurance emergency system according to claim 1, wherein: The interaction module includes: a four-direction vibration motor of the wearable device (escape direction recognition rate 92%), an emergency alarm button (anti-misoperation design, activated by long pressing for 2 seconds), an offline voice wake-up component (5 keywords, anti-noise algorithm (based on MFCC feature extraction), improving the recognition rate in a noisy environment to -40°C wake-up rate ≥ 95%, and improving the low-temperature reliability through a built-in temperature compensation algorithm (based on BLE temperature sensor data)), and a six-axis inertial sensor (low-power MPU6050, range ±8g, used for human body posture monitoring (such as fall detection, motion state recognition)); a three-color LED indicator light, an 85dB buzzer, and a segmental LCD screen (-50°C to 85°C, response time ≤ 200ms) of the master device. After the master device receives the red priority alarm signal from the wearable device, it immediately sends an emergency rescue request including position, vital signs data, and alarm type to the command center through Beidou short message. The red priority alarm signal includes the alarm type (fall / manual / environment). The master device starts different response strategies according to the type. The manual alarm priority is higher than the environmental alarm. When both are triggered simultaneously, the manual alarm is processed first; the master device fuses the environmental data and vital signs data within 0.5 seconds after receiving the alarm and starts a three-level sound and light alarm (three-color LED high-frequency flashing + buzzer sound intensity ≥ 105dB).

9. The multi-device collaborative global multi-mode long-endurance emergency system according to claim 1, characterized in that: The remote firmware upgrade mechanism supports dual-path upgrades via satellite links (Beidou / Starlink) and LoRa self-organizing networks. The upgrade package undergoes CRC32 verification, AES-128 decryption, and RSA2048 digital signature verification, and supports resume from breakpoint and differential upgrades.

10. The multi-device collaborative global multi-mode long-endurance emergency system according to claim 1, wherein: The 5-level rescue priority encoding (0x00 - 0x04) is generated by fusing life data and environmental data. The red priority (0x04) triggers the prioritized dispatch of drones + robots, with a response time ≤ 5 minutes and the beacon broadcast frequency increased to 50Hz; the orange priority (0x03) dispatches the nearest rescue team (radius ≤ 500 meters), with additional escape direction guidance.

Images