Multi-terminal cooperative emergency rescue system and method for the elderly

Abstract

The application relates to the technical field of emergency rescue and discloses an old-age-adapted multi-terminal cooperative emergency rescue system and method, which comprises a sensing layer, a core layer and an application layer, the sensing layer comprises sensing terminals, the core layer comprises a core control terminal, a double-link communication unit, a linkage control unit, a positioning unit and a self-checking and self-recovery unit; the sensing terminal collects basic physiological parameters of heart rate, blood pressure and blood oxygen, realizes fall detection by adopting a three-axis acceleration + gyroscope fusion algorithm, has a one-key SOS alarm button and realizes real-time detection of electric quantity; the sensing terminal adopts a double working mode of a cooperative mode and an independent emergency mode; in the cooperative mode, the sensing terminal is connected with the core control terminal through local short-distance wireless connection; the application scheme can abandon redundant functions and complex logic, simplify a hardware structure, a cooperative mechanism and software functions, reduce fault points from the root, reduce equipment operation load and greatly reduce a fault occurrence rate.

Description

Technical Field

[0001] This invention belongs to the field of emergency rescue technology, specifically an age-friendly multi-terminal collaborative emergency rescue system and method. Background Technology

[0002] As my country's population ages, the number of elderly people living alone, empty-nest elderly, and disabled elderly continues to rise. The core needs of emergency assistance for the elderly are "system stability, reliable alarms, and availability even when the network is down." Currently available emergency equipment and systems for the elderly suffer from insufficient operational stability due to redundant functions and complex logic. They mainly have the following core defects and cannot meet the core requirement of "stability first" in elderly emergency response: (a) Insufficient communication coverage and poor stability Existing systems mostly use a single communication method without redundancy or backup, making them unable to trigger alarms in remote mountainous areas, basements, or other scenarios without public network signals. Elderly individuals wearing only wristbands lack independent communication capabilities when outdoors, rendering the system ineffective without network coverage, directly impacting emergency reliability. While some existing solutions attempt to replace communication modules or protocols, they haven't addressed the core issue of "single-link lack of redundancy," and thus cannot achieve uninterrupted communication. (ii) The positioning mode is complex, with high power consumption and instability. Single positioning mode or complex positioning logic not only result in insufficient positioning accuracy, but also lead to high power consumption, shortened battery life, frequent charging, and easy device failure, reducing the overall stability of the system. Some existing solutions circumvent the existing design by adjusting positioning parameters, but do not change the essence of "single positioning mode" and still cannot balance power consumption, accuracy and stability. (iii) The multi-terminal collaborative logic is cumbersome and prone to failure. Terminals such as vital signs devices, pagers, and cameras operate independently or have complex collaborative logic. Without a unified and simple networking and status synchronization mechanism, faults cannot be detected in a timely manner, easily leading to partial or complete system paralysis. Existing solutions mostly involve simple device splicing without achieving local collaborative linkage. Even changing the communication method between devices does not solve the problem of "paralysis upon network outage." (iv) High false alarm rate, which increases system load. Relying solely on a single device to detect anomalies, without a simple and reliable secondary confirmation mechanism, leads to frequent false triggers and misjudgments. This not only wastes rescue resources but also increases the system's operational load, induces equipment malfunctions, and affects stability. (v) The fault handling mechanism is complex and the self-healing ability is weak. Without a simple and reliable self-inspection and self-healing mechanism, service is interrupted after a failure, there is a lack of backup solutions, and the complex fault handling logic can easily lead to new failures, resulting in low system availability. Even if the existing solution simplifies the fault handling process, it still does not achieve the complete self-healing logic of "core module self-inspection + automatic link switching + system degradation operation", and cannot guarantee system availability in extreme scenarios.

[0003] Therefore, we propose an age-friendly multi-terminal collaborative emergency rescue system and method. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an age-friendly multi-terminal collaborative emergency rescue system and method, which effectively solves the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an age-friendly multi-terminal collaborative emergency rescue system, comprising a sensing layer, a core layer, and an application layer. The sensing layer includes a sensing terminal, and the core layer includes a core control terminal, a dual-link communication unit, a linkage control unit, a positioning unit, and a self-testing and self-healing unit. Sensing terminal: Collects basic physiological parameters such as heart rate, blood pressure, and blood oxygen; uses a three-axis accelerometer + gyroscope fusion algorithm for fall detection; features a one-button SOS alarm; monitors battery level in real time; and employs a dual-mode operation: collaborative mode and independent emergency mode. Collaborative mode: Connects to the core control terminal via local short-range wireless connection, enabling only data synchronization and command interaction between devices, without external data transmission. Independent emergency mode: Automatically switches upon disconnection from the core control terminal, enabling satellite positioning + cellular narrowband communication to independently complete alarm and location reporting. Subordinate limitation parameters: Default low-frequency acquisition mode (20-60 seconds / time). Core control terminal: Connects to the sensing terminal via local short-range wireless, and is responsible for coordinating with the sensing terminal, aggregating core data, and issuing commands; Dual-link communication unit: Includes a cellular narrowband communication module and a satellite communication module, with link delay switching and emergency dual-transmission redundancy functions to ensure stable transmission of alarm information and location data even in scenarios without public network access; Linkage control unit: Used to realize alarm-triggered linkage. Only when the sensing terminal or the core control terminal triggers an alarm, the video terminal is woken up to perform secondary confirmation of the abnormality and filter false alarms. Positioning Unit: Employs a dual-mode approach of "indoor fixed address + outdoor satellite positioning," reporting based on a fixed priority for each scenario. The terminal does not perform positioning fusion calculations; the platform simply selects the valid results, balancing positioning accuracy and device power consumption. The dual-mode logic of the positioning unit is as follows: When an alarm is triggered in an indoor scenario, a preset fixed address is sent; when an outdoor scenario or when the vital signs terminal is in an independent emergency mode, satellite positioning is activated. The terminal does not perform positioning data fusion calculations; the platform simply selects the valid positioning results. Subordinate parameters: outdoor satellite positioning error ≤ 10 meters, response time ≤ 3 seconds. Self-inspection and self-healing unit: Used to periodically test each core module of the system. In case of failure, it automatically reports, automatically switches links, and degrades the system to ensure that the core emergency functions are not interrupted. It only tests core modules such as communication, positioning, and power supply, and does not test redundant functional modules. In case of failure, it automatically reports, automatically switches links, and degrades the system to ensure that the core emergency functions are not interrupted. Subordinate limiting parameters: fault self-healing success rate ≥90%-98%, core control terminal standby time ≥10-20 days.

[0006] Preferably, the sensing terminal is connected to a vital signs monitoring terminal and a video terminal. The vital signs monitoring terminal is used to collect the elderly's physiological parameters, detect fall anomalies, and receive manual alarm commands. The video terminal is used to capture abnormal images and conduct two-way voice calls to achieve secondary confirmation of anomalies. It has no redundant functions such as active recognition or constant monitoring. It is only activated when an alarm is triggered to complete local video caching and two-way voice calls to achieve secondary confirmation of anomalies. The video content is not automatically uploaded. It is only uploaded when authorized personnel actively request it. The subordinate limiting parameters are: default deep sleep, sleep power consumption ≤30-100mW, wake up within 1 second after alarm is triggered, and automatically go into sleep within 5-30 seconds after the rescue is completed. The video resolution can be adjusted to 720P-4K. It is reported only after the dual sources confirm that they are consistent.

[0007] Preferably, the core control terminal includes a main control module, a battery module, and a heartbeat detection module; Main control module: Low-power MCU chip with a response latency of ≤0.5-2 seconds, responsible only for core instruction interaction and does not undertake redundant calculations; Battery module: Lithium battery, supports universal charging interface, triggers warning when battery level is below 15%-30%; Heartbeat detection module: Sends a heartbeat signal every 2-5 seconds. If there is no response for 6-15 consecutive seconds, it is considered a device malfunction and is immediately reported.

[0008] Preferably, the dual-link communication unit includes a cellular narrowband communication module and a satellite communication module; Cellular narrowband communication module: including but not limited to NB-IoT, Cat.1, 2G / 4G narrowband, communication rate ≥0.5-2kbps, transmission delay ≤3-10 seconds, only transmitting core data; Satellite communication module: including but not limited to Beidou short message service, Tiantong-1, Iridium satellite, positioning accuracy error ≤ 5-15 meters, positioning response time, serving as a backup communication method in scenarios without public network access; Subordinate limited switching logic: When the RSSI of the cellular narrowband communication signal is ≥-95dBm to -105dBm, it is used first. After the signal is lower than the threshold, if the local relay confirms that there is no available forwarding path and the signal has not recovered after a delay of 3 seconds, it will wake up and switch to the satellite communication module. The switching time is ≤5-15 seconds. In case of emergency alarm, both links send data simultaneously.

[0009] Preferably, the local short-range wireless connection includes, but is not limited to, BLE Bluetooth, LoRa, ZigBee, UWB, etc., which connect automatically without manual intervention. Subordinate limitation: the vital signs terminal automatically connects when the distance between the vital signs terminal and the core control terminal is ≤20 meters, and the vital signs terminal automatically switches to independent emergency mode after the connection is lost.

[0010] Preferably, the application layer serves as the system's control and emergency response terminal, with the following specific subordinate limitations: Family App: Compatible with Android, iOS and other systems, supports alarm reception, video viewing, two-way voice calls and device status viewing; Community platform: Supports equipment status monitoring, alarm handling, and rescue dispatch; can be integrated with community management systems in different regions. Emergency Center Platform: Supports alarm aggregation, 120 emergency medical service linkage, and rescue tracking, and can be connected with provincial and municipal emergency platforms.

[0011] How to use the age-friendly multi-terminal collaborative emergency rescue system: The specific steps involved in using this method are as follows: S1 device deployment: The core control terminal is wall-mounted in the living room of the elderly person's home (in an easily accessible location), the AI ​​camera is hidden in the corner of the living room, the elderly person wears a vital signs bracelet, and the device is bound to the family APP, community platform, and emergency center platform. After the device is powered on, it automatically completes Bluetooth connection and core module self-test and enters daily monitoring state. S2 Daily Monitoring: The wristband collects heart rate, blood pressure, and blood oxygen data every 30 seconds and synchronizes them to the core control terminal via Bluetooth. The core control terminal then uploads the basic data to the community platform via the NB-IoT module. The AI ​​camera is in deep sleep mode and only receives Bluetooth trigger signals. The core control terminal sends a heartbeat signal every 3 seconds to monitor the connection status of the wristband and camera. S3 Home Abnormal Trigger: When an elderly person suddenly falls, the wristband detects the fall signal and immediately sends an abnormal signal to the core control terminal via Bluetooth. The core control terminal triggers an alarm and simultaneously wakes up the AI ​​camera via Bluetooth. S4 Dual-Source Confirmation: After the AI ​​camera is woken up, the video is cached locally and two-way voice is started. Community platform staff check the elderly’s status through video and ask questions by voice. After confirming the fall is abnormal (no false alarm), the emergency response is initiated. S5 Positioning and Transmission: When the core control terminal detects that the NB-IoT signal is normal, it uses the NB-IoT main link to send alarm information and Beidou positioning data to the community platform and the emergency center platform. Video content is only uploaded when authorized personnel request it. At the same time, alarm information is sent synchronously through dual links (NB-IoT + Beidou short message) to ensure that the information is delivered. S6 Emergency Response: The community platform dispatches rescue personnel to the elderly person's home, and the family members receive an alarm notification through the APP. They can view the on-site video and communicate with the rescue personnel via voice through the APP; the emergency center platform coordinates with 120 emergency services to track the rescue progress in real time. S7 Fault Handling: If the core control terminal detects an interruption in the NB-IoT signal (RSSI < -100dBm), after confirming that there is no forwarding path through the local relay and after a 3-second delay, it automatically switches to the BeiDou short message fallback link to continuously send alarm information and location data to ensure uninterrupted communication. S8 Rescue Ends: After the rescuers arrive at the scene and complete the handling, they send a rescue end command through the community platform. The AI ​​camera returns to deep sleep, the wristband switches to low-frequency acquisition mode, the core control terminal stops alarming, and the system resumes its daily monitoring status.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. Extremely stable system operation: By eliminating redundant functions and complex logic, simplifying hardware structure, coordination mechanisms and software functions, the system reduces failure points at the source, reduces equipment operating load, and significantly reduces the failure rate. 2. Stable and reliable communication: It adopts a dual-link redundancy design of "cellular narrowband communication + satellite communication", with simple switching logic. In scenarios without public network signal, satellite communication can be used as a backup, solving the core pain points of unstable communication and network failure in existing systems. 3. Accurate and stable positioning: It adopts a dual mode of "indoor fixed address + outdoor satellite positioning", reports according to fixed priority of the scene, and the terminal does not perform fusion calculation. It takes into account positioning accuracy and device power consumption, and is suitable for multiple scenarios such as home, outdoors, and mountainous areas. The positioning response is fast and the error is small.

[0013] 4. Low false alarm rate and low system load: The simplified dual-source confirmation mechanism effectively filters false alarms caused by accidental touch and misjudgment, reduces the waste of rescue resources, and reduces the ineffective operation load of the system, further improving system stability; 5. Strong self-healing capability: The self-inspection and self-healing logic is simple and reliable, and only the core modules are detected and restored. After a failure, the link can be switched quickly and the system can be degraded to ensure that the core emergency functions are not interrupted, thus solving the defect of service interruption after the failure of the existing system. 6. Low power consumption and long battery life: The simplified power consumption control strategy ensures that the video terminal is only woken up when an alarm is triggered, and the wristband and core control terminal operate with low power consumption, greatly improving battery life, reducing charging frequency, reducing device failures caused by charging, and adapting to the usage habits of the elderly. 7. Simple operation and maintenance: The functions are streamlined and the equipment is extremely easy to operate, making it suitable for the elderly, those living alone, and those with disabilities. The maintenance process is simplified, requiring only monitoring of the status of the core modules, reducing maintenance costs and difficulty, and making it suitable for large-scale deployment. 8. Multi-scenario adaptation, controllable price of complete sets, suitable for large-scale applications: streamlined functions, privacy protection, stable operation, and suitable for home-based elderly care, community elderly care, outdoor travel and communication-deficient scenarios such as mountainous and remote areas; controllable equipment costs, while local short-range wireless connection and external communication link can be flexibly selected according to the scenario, further improving adaptability; 9. Data Security Compliance: Emergency data is transmitted and stored using encryption, achieving dual protection of local encrypted storage and cloud encrypted backup, preventing data leakage and tampering, and complying with relevant regulations on elderly privacy protection; data security is a core protection blind spot supplement of this invention, any design that does not use encryption to transmit / store emergency data is an act of circumvention and constitutes equivalent infringement, while filling the gap in data security protection and enhancing the value of the patent. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a block diagram of the invention system. Figure 2 This is a flowchart of the dual working mode switching process for the vital signs monitoring terminal of the present invention; Figure 3 This is a flowchart of the link redundancy communication switching process of the present invention. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] Example 1: The age-friendly multi-terminal collaborative emergency rescue system includes a perception layer, a core layer, and an application layer. The perception layer includes perception terminals, and the core layer includes a core control terminal, a dual-link communication unit, a linkage control unit, a positioning unit, and a self-testing and self-healing unit. Sensing terminal: Collects basic physiological parameters such as heart rate, blood pressure, and blood oxygen; uses a three-axis accelerometer + gyroscope fusion algorithm for fall detection; features a one-button SOS alarm (large button, anti-accidental touch design); monitors battery level in real time; and employs a dual-mode operation: collaborative mode and independent emergency mode. Collaborative mode: Connects to the core control terminal via local short-range wireless connection, enabling only data synchronization and command interaction between devices, without external data transmission. Independent emergency mode: Automatically switches upon disconnection from the core control terminal, enabling satellite positioning + cellular narrowband communication to independently complete alarm and location reporting. Subordinate limitation parameters: Default low-frequency acquisition mode (20-60 seconds / time, 30 seconds / time in this embodiment); switches to high-frequency acquisition mode (3-10 seconds / time, 5 seconds / time in this embodiment) in case of an anomaly; has no non-emergency redundancy functions. Core control terminal: As the only core node of the system, it is connected to the sensing terminal via local short-range wireless connection. It is responsible for sensing terminal coordination, core data aggregation, and command issuance. It adopts an age-friendly large button design to simplify the operation logic. Dual-link communication unit: Includes a cellular narrowband communication module and a satellite communication module, with link delay switching and emergency dual-transmission redundancy functions to ensure stable transmission of alarm information and location data even in scenarios without public network access; Linkage control unit: Used to realize alarm-triggered linkage. Only when the sensing terminal or the core control terminal triggers an alarm, the video terminal is woken up to perform secondary confirmation of the abnormality and filter false alarms. Positioning Unit: Employs a dual-mode approach of "indoor fixed address + outdoor satellite positioning," reporting based on fixed priority within a specific scenario. The terminal does not perform positioning fusion calculations; the platform simply selects the valid result, balancing positioning accuracy and device power consumption. The dual-mode logic is as follows: When an alarm is triggered in an indoor scenario, a preset fixed address is sent; when an outdoor scenario or when the vital signs terminal is in independent emergency mode, satellite positioning is activated. The terminal does not perform positioning data fusion calculations; the platform simply selects the valid positioning result. Subjective parameters: Outdoor satellite positioning error ≤ 10 meters, response time ≤ 3 seconds; system availability ≥ 99.5%-99.95%. Self-inspection and self-healing unit: Used to periodically test each core module of the system. In case of a fault, it automatically reports the fault, automatically switches links, and degrades the system to ensure uninterrupted core emergency functions. It only tests core modules such as communication, positioning, and power supply, and does not test redundant functional modules. The self-healing success rate is ≥90%-98% (≥95% in this embodiment); the core control terminal has a standby time of ≥10-20 days (≥15 days in this embodiment). The above six core components must be functionally coupled and cannot be operated independently. They must work together to complete the core emergency rescue process. Separating any one of the units will not achieve the core technical effect of "extreme system stability, uninterrupted communication, and availability even when the network is down". The sensing terminal connects to a vital signs monitoring terminal and a video terminal. The vital signs monitoring terminal is used to collect the elderly's physiological parameters, detect falls and abnormalities, and receive manual alarm commands. The video terminal is used to capture abnormal images and conduct two-way voice calls (for emergency guidance), enabling secondary confirmation of abnormalities. It has no redundant functions such as active recognition or continuous monitoring; it only wakes up when an alarm is triggered to complete local video caching, two-way voice calls (for emergency guidance), and secondary confirmation of abnormalities. Video content is not automatically uploaded; it is only uploaded when authorized personnel actively request playback. Subordinate parameters: default deep sleep, sleep power consumption ≤30-100mW (this is the case). The alarm power consumption is ≤50mW. The system wakes up within 1 second after the alarm is triggered and automatically goes into sleep mode within 5-30 seconds (10 seconds in this embodiment) after the rescue is completed. The video resolution can be adjusted from 720P to 4K (1080P in this embodiment). The false alarm rate is ≤0.5%-2% (≤1% in this embodiment). The system only reports after both sources confirm the alarm. The alarm wake-up mechanism of the video terminal is forcibly bound to the low power consumption state, and the dual-source confirmation mechanism is forcibly bound to the low false alarm effect. Both are necessary conditions for the stable operation of the system. Modifying either mechanism alone (such as canceling low power consumption or deleting dual-source confirmation) will not achieve the core technical effect of this invention. The core control terminal includes a main control module, a battery module, and a heartbeat detection module; Main control module: Low-power MCU chip (no specific model is limited), response latency ≤0.5-2 seconds (≤1 second in this embodiment), only responsible for core instruction interaction, and does not undertake redundant calculations; Battery module: Lithium battery, supports universal charging interface (Type-C in this embodiment), triggers warning when the battery level is below 15%-30% (20% in this embodiment); Heartbeat detection module: Sends a heartbeat signal every 2-5 seconds (3 seconds in this embodiment). If there is no response for 6-15 seconds (9 seconds in this embodiment), the device is deemed to be faulty and is immediately reported. The dual-link communication unit includes a cellular narrowband communication module and a satellite communication module; Cellular narrowband communication module: including but not limited to NB-IoT, Cat.1, 2G / 4G narrowband (implementing NB-IoT), communication rate ≥0.5-2kbps (implementing ≥1kbps), transmission delay ≤3-10 seconds (implementing ≤5 seconds), only transmitting core data (alarm information, location data, physiological parameters); Satellite communication module: including but not limited to BeiDou short message service, Tiantong-1, Iridium (implementing BeiDou short message service), positioning accuracy error ≤5-15 meters (implementing ≤10 meters), positioning response time ≤2-5 seconds (implementing ≤3 seconds), serving as a backup communication method in scenarios without public network access; Subordinate-limited switching logic: Cellular narrowband communication signals with RSSI ≥ -95dBm to -105dBm (implementation ≥ -100dBm) are used first. If the signal falls below the threshold, and the local relay confirms that there is no available forwarding path and the signal has not recovered after a 3-second delay, the system will wake up and switch to the satellite communication module. The switching time is ≤ 5-15 seconds (implementation ≤ 10 seconds). In case of an emergency alarm, both links will send data simultaneously.

[0018] Additional notes: Emergency data (including location data, alarm information, and elderly physiological parameters) transmitted by the dual-link communication unit must be transmitted in an encrypted manner (including but not limited to symmetric encryption and asymmetric encryption). The core control terminal uses local encrypted storage for the above emergency data and simultaneously synchronizes it to the cloud for encrypted backup to ensure that the emergency data is not leaked or tampered with, and to comply with relevant regulations on the protection of elderly privacy. Local short-range wireless connection includes, but is not limited to, BLE Bluetooth, LoRa, ZigBee, UWB, etc. (BLE Bluetooth in this embodiment), with a connection success rate of ≥99%-99.8% (≥99.5% in this embodiment), requiring no manual intervention and connecting automatically. Subordinate limitation: Automatic connection when the distance between the vital signs terminal and the core control terminal is ≤20 meters, and automatic switch to independent emergency mode after connection is lost; The application layer, serving as the system's control and emergency response terminal, features a simplified functional design, retaining only core control and emergency response functions. Its core protection point is "core emergency response + multi-terminal collaboration." Regardless of how the platform carrier (APP, web page, terminal device) is adjusted, as long as the core control functions are retained, the specific subordinate limitations are as follows: Family App: Compatible with Android, iOS and other systems, with a minimalist interface, supporting alarm reception, video viewing, two-way voice calls, and device status viewing. The size of the interface buttons and the font can be adjusted according to the needs of the elderly. Community platform: Supports equipment status monitoring, alarm handling, and rescue dispatch; can be integrated with community management systems in different regions. Emergency Center Platform: Supports alarm aggregation, 120 emergency medical service linkage, and rescue tracking; can be connected with provincial and municipal emergency platforms (such as Guizhou's "Guiren Guardian" emergency cloud platform); Example 2: Please see Figure 1 The usage method of the age-friendly multi-terminal collaborative emergency rescue system includes the following steps: S1 device deployment: The core control terminal is wall-mounted in the elderly person's living room (in an easily accessible location), the AI ​​camera is hidden in a corner of the living room, the elderly person wears a vital signs bracelet, and the device is bound to the family APP, community platform, and emergency center platform. After the device is powered on, it automatically completes Bluetooth connection and core module self-test, and enters daily monitoring state. S2 Daily Monitoring: The wristband collects heart rate, blood pressure, and blood oxygen data every 30 seconds and synchronizes them to the core control terminal via Bluetooth. The core control terminal then uploads the basic data to the community platform via the NB-IoT module. The AI ​​camera is in deep sleep mode and only receives Bluetooth trigger signals. The core control terminal sends a heartbeat signal every 3 seconds to monitor the connection status of the wristband and camera. S3 Home Abnormal Trigger: When an elderly person suddenly falls, the wristband detects the fall signal and immediately sends an abnormal signal to the core control terminal via Bluetooth. The core control terminal triggers an alarm and simultaneously wakes up the AI ​​camera via Bluetooth. S4 Dual-Source Confirmation: After the AI ​​camera is woken up, the video is cached locally and two-way voice is started. Community platform staff check the elderly’s status through video and ask questions by voice. After confirming the fall is abnormal (no false alarm), the emergency response is initiated. S5 Positioning and Transmission: When the core control terminal detects that the NB-IoT signal is normal (RSSI≥-100dBm), it uses the NB-IoT main link to send alarm information and Beidou positioning data to the community platform and emergency center platform. Video content is only uploaded when authorized personnel request it. At the same time, alarm information is sent synchronously through dual links (NB-IoT + Beidou short message) to ensure that the information is delivered. S6 Emergency Response: The community platform dispatches rescue personnel to the elderly person's home, and the family members receive an alarm notification through the APP. They can view the on-site video and communicate with the rescue personnel via voice through the APP; the emergency center platform coordinates with 120 emergency services to track the rescue progress in real time. S7 Fault Handling: If the core control terminal detects an interruption in the NB-IoT signal (RSSI < -100dBm), after confirming that there is no forwarding path through the local relay and after a 3-second delay, it automatically switches to the BeiDou short message fallback link to continuously send alarm information and location data to ensure uninterrupted communication. S8 Rescue Ends: After the rescuers arrive at the scene and complete the handling, they send a rescue end command through the community platform. The AI ​​camera returns to deep sleep, the wristband switches to low-frequency acquisition mode, the core control terminal stops alarming, and the system resumes its daily monitoring status.

[0019] Example 3: Age-friendly multi-terminal collaborative emergency rescue system: including a perception layer, a core layer and an application layer. The perception layer includes a perception terminal, and the core layer includes a core control terminal, a dual-link communication unit, a linkage control unit, a positioning unit and a self-testing and self-healing unit. Sensing terminal: Collects basic physiological parameters such as heart rate, blood pressure, and blood oxygen; uses a three-axis accelerometer + gyroscope fusion algorithm for fall detection; features a one-button SOS alarm (large button, anti-accidental touch design); monitors battery level in real time; and employs a dual-mode operation: collaborative mode and independent emergency mode. Collaborative mode: Connects to the core control terminal via local short-range wireless connection, enabling only data synchronization and command interaction between devices, without external data transmission. Independent emergency mode: Automatically switches upon disconnection from the core control terminal, enabling satellite positioning + cellular narrowband communication to independently complete alarm and location reporting. Subordinate limitation parameters: Default low-frequency acquisition mode (30 seconds / time in this embodiment), switches to high-frequency acquisition mode (5 seconds / time in this embodiment) in case of an anomaly, with no non-emergency redundancy functions. Core control terminal: As the only core node of the system, it is connected to the sensing terminal via local short-range wireless connection. It is responsible for sensing terminal coordination, core data aggregation, and command issuance. It adopts an age-friendly large button design to simplify the operation logic. Dual-link communication unit: Includes a cellular narrowband communication module and a satellite communication module, with link delay switching and emergency dual-transmission redundancy functions to ensure stable transmission of alarm information and location data even in scenarios without public network access; Linkage control unit: Used to realize alarm-triggered linkage. Only when the sensing terminal or the core control terminal triggers an alarm, the video terminal is woken up to perform secondary confirmation of the abnormality and filter false alarms. Positioning Unit: Employs a dual-mode approach of "indoor fixed address + outdoor satellite positioning," reporting based on fixed priority within a specific scenario. The terminal does not perform positioning fusion calculations; the platform simply selects the valid result, balancing positioning accuracy and device power consumption. The dual-mode logic is as follows: When an alarm is triggered in an indoor scenario, a preset fixed address is sent; when an outdoor scenario or when the vital signs terminal is in independent emergency mode, satellite positioning is activated. The terminal does not perform positioning data fusion calculations; the platform simply selects the valid positioning result. Subjective parameters: Outdoor satellite positioning error ≤ 10 meters, response time ≤ 3 seconds; system availability ≥ 99.5%-99.95%. Self-inspection and self-healing unit: Used to periodically test each core module of the system. In case of a fault, it automatically reports the fault, automatically switches links, and degrades the system to ensure uninterrupted core emergency functions. It only tests core modules such as communication, positioning, and power supply, and does not test redundant functional modules. The self-healing success rate is ≥90%-98% (≥95% in this embodiment); the core control terminal has a standby time of ≥10-20 days (≥15 days in this embodiment). The above six core components must be functionally coupled and cannot be operated independently. They must work together to complete the core emergency rescue process. Separating any one of the units will not achieve the core technical effect of "extreme system stability, uninterrupted communication, and availability even when the network is down". The sensing terminal connects to a vital signs monitoring terminal and a video terminal. The vital signs monitoring terminal is used to collect the elderly's physiological parameters, detect falls and abnormalities, and receive manual alarm commands. The video terminal is used to capture abnormal images and conduct two-way voice calls (for emergency guidance), enabling secondary confirmation of abnormalities. It has no redundant functions such as active recognition or continuous monitoring; it only wakes up when an alarm is triggered to complete local video caching, two-way voice calls (for emergency guidance), and secondary confirmation of abnormalities. Video content is not automatically uploaded; it is only uploaded when authorized personnel actively request playback. Subordinate parameters: default deep sleep, sleep power consumption ≤30-100mW (this is the case). The alarm power consumption is ≤50mW. The system wakes up within 1 second after the alarm is triggered and automatically goes into sleep mode within 5-30 seconds (10 seconds in this embodiment) after the rescue is completed. The video resolution can be adjusted from 720P to 4K (720P in this embodiment). The false alarm rate is ≤0.5%-2% (≤1% in this embodiment). The system only reports after both sources confirm the alarm. The alarm wake-up mechanism of the video terminal is forcibly bound to the low power consumption state, and the dual-source confirmation mechanism is forcibly bound to the low false alarm effect. Both are necessary conditions for the stable operation of the system. Modifying either mechanism alone (such as canceling low power consumption or deleting dual-source confirmation) will not achieve the core technical effect of this invention. The core control terminal includes a main control module, a battery module, and a heartbeat detection module; Main control module: Low-power MCU chip (no specific model is limited), response latency ≤0.5-2 seconds (≤1 second in this embodiment), only responsible for core instruction interaction, and does not undertake redundant calculations; Battery module: Lithium battery, supports universal charging interface (Type-C in this embodiment), triggers warning when the battery level is below 15%-30% (20% in this embodiment); Heartbeat detection module: Sends a heartbeat signal every 2-5 seconds (3 seconds in this embodiment). If there is no response for 6-15 seconds (9 seconds in this embodiment), the device is deemed to be faulty and is immediately reported. The dual-link communication unit includes a cellular narrowband communication module and a satellite communication module; Cellular narrowband communication module: including but not limited to NB-IoT, Cat.1, 2G / 4G narrowband (implementing Cat.1), communication rate ≥0.5-2kbps (implementing ≥1kbps), transmission delay ≤3-10 seconds (implementing ≤5 seconds), only transmitting core data (alarm information, location data, physiological parameters); Satellite communication module: including but not limited to Beidou short message service, Tiantong-1, Iridium (implementing Tiantong-1), positioning accuracy error ≤5-15 meters (implementing ≤10 meters), positioning response time ≤2-5 seconds (implementing ≤3 seconds), serving as a backup communication method in scenarios without public network access; Subordinate-limited switching logic: Cellular narrowband communication signals with RSSI ≥ -95dBm to -105dBm (implementation ≥ -100dBm) are used first. If the signal falls below the threshold, and the local relay confirms that there is no available forwarding path and the signal has not recovered after a 3-second delay, the system will wake up and switch to the satellite communication module. The switching time is ≤ 5-15 seconds (implementation ≤ 10 seconds). In case of an emergency alarm, both links will send data simultaneously.

[0020] Additional notes: Emergency data (including location data, alarm information, and elderly physiological parameters) transmitted by the dual-link communication unit must be transmitted in an encrypted manner (including but not limited to symmetric encryption and asymmetric encryption). The core control terminal uses local encrypted storage for the above emergency data and simultaneously synchronizes it to the cloud for encrypted backup to ensure that the emergency data is not leaked or tampered with, and to comply with relevant regulations on the protection of elderly privacy. Local short-range wireless connection includes, but is not limited to, BLE Bluetooth, LoRa, ZigBee, UWB, etc. (LoRa connection in this embodiment), which is suitable for long-distance device linkage scenarios in mountainous areas. The connection success rate is ≥99%-99.8% (≥99.5% in this embodiment). No manual intervention is required. Automatic connection is possible. Subordinate limitation: Automatic connection is achieved when the distance between the vital signs terminal and the core control terminal is ≤15 meters. After the connection is lost, the vital signs terminal automatically switches to independent emergency mode. The application layer, serving as the system's control and emergency response terminal, features a simplified functional design, retaining only core control and emergency response functions. Its core protection point is "core emergency response + multi-terminal collaboration." Regardless of how the platform carrier (APP, web page, terminal device) is adjusted, as long as the core control functions are retained, the specific subordinate limitations are as follows: Family App: Compatible with Android, iOS and other systems, with a minimalist interface, supporting alarm reception, video viewing, two-way voice calls, and device status viewing. The size of the interface buttons and the font can be adjusted according to the needs of the elderly. Community platform: Supports equipment status monitoring, alarm handling, and rescue dispatch; can be integrated with community management systems in different regions. Emergency Center Platform: Supports alarm aggregation, 120 emergency medical service linkage, and rescue tracking. It can connect with provincial and municipal emergency platforms (such as the Guizhou "Guiren Guardian" emergency cloud platform).

[0021] Example 4 Core Mechanism: Automatic short-range wireless connection: The sensing terminal and the core control terminal automatically connect after power-on. The connection status is monitored by heartbeat signal. When the connection is abnormal, an alarm is triggered and the connection is reconnected. The wristband automatically switches to independent emergency mode after disconnection. Dual-mode positioning: "Indoor fixed address + outdoor satellite positioning", reporting is based on fixed priority according to the scenario, the terminal does not perform integrated calculations, balancing accuracy and power consumption, and adapting to multiple scenarios; Dual-link communication switching: Switching is delayed based on signal strength, and the backup link is woken up after confirmation by the local relay. Dual redundancy is provided in case of emergency to ensure that communication is never interrupted. False alarm filtering mechanism: Simple dual-source confirmation, confirming at home through video terminal linkage, and verifying at home through wristband dual verification to filter false alarms; Fault self-checking and self-healing: Core modules perform periodic self-checks, automatically report faults, switch links, and degrade the system to ensure uninterrupted emergency services.

[0022] Example 5 The usage method of the age-friendly multi-terminal collaborative emergency rescue system includes the following steps: The S1 sensing terminal establishes a local wireless connection with the core control terminal, completes device binding and core module self-test, and enters a low-power daily monitoring state. During the S2 routine monitoring phase, the vital signs monitoring terminal collects physiological parameters at low frequency and synchronizes them to the core control terminal. The video terminal is in a deep sleep state, and the core control terminal monitors the device connection status and its own core module status in real time. In the S3 abnormal triggering phase, when the sensing terminal detects an elderly person's physiological abnormality or fall, or receives a manual alarm command, or the core control terminal is triggered to alarm, it immediately sends an abnormal signal and starts the emergency procedure. In the S4 dual-source confirmation phase, the linkage control unit triggers the video terminal to wake up. Through local video image caching + voice inquiry (home scenario) or dual verification with wristband (outdoor scenario), the abnormality is confirmed again and false alarms are filtered out. If no abnormality is confirmed, the emergency process is terminated and the video terminal returns to deep sleep. During the S5 positioning and transmission phase, the corresponding positioning mode (indoor fixed address, outdoor satellite positioning) is activated according to the alarm scenario. The dual-link communication unit switches the communication link with a delay based on the signal strength. After confirmation by the local relay, the fallback link is activated. In case of an emergency alarm, both links simultaneously send alarm information, positioning data, and physiological parameters to the application layer. During the S6 emergency response phase, after receiving alarm information, the application layer simultaneously pushes reminders to family members, the community, and the emergency center. Staff dispatch rescue efforts, and family members can view on-site videos and receive voice guidance through the application layer. Rescue personnel can simultaneously obtain on-site information. During the S7 fault handling phase, the self-inspection and self-healing unit periodically tests the core modules, immediately reports any faults found, and initiates the self-healing mechanism (link switching, system degradation operation) to ensure that the core emergency functions are not interrupted. Upon receiving the rescue termination command, the S8 system resumes low-power daily monitoring mode. The vital signs monitoring terminal and the core control terminal re-establish their collaborative connection, while the video terminal remains in deep sleep mode. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An age-friendly multi-terminal collaborative emergency rescue system, characterized in that: It includes a perception layer, a core layer and an application layer. The perception layer includes a perception terminal, and the core layer includes a core control terminal, a dual-link communication unit, a linkage control unit, a positioning unit and a self-testing and self-healing unit. Sensing terminal: Collects basic physiological parameters such as heart rate, blood pressure, and blood oxygen; uses a three-axis accelerometer + gyroscope fusion algorithm for fall detection; features a one-button SOS alarm; monitors battery level in real time; and employs a dual-mode operation: collaborative mode and independent emergency mode. Collaborative mode: Connects to the core control terminal via local short-range wireless connection, enabling only data synchronization and command interaction between devices, without external data transmission. Independent emergency mode: Automatically switches upon disconnection from the core control terminal, enabling satellite positioning + cellular narrowband communication to independently complete alarm and location reporting. Subordinate limitation parameters: Default low-frequency acquisition mode (20-60 seconds / time). Core control terminal: Connects to the sensing terminal via local short-range wireless, and is responsible for coordinating with the sensing terminal, aggregating core data, and issuing commands; Dual-link communication unit: Includes a cellular narrowband communication module and a satellite communication module, with link delay switching and emergency dual-transmission redundancy functions to ensure stable transmission of alarm information and location data even in scenarios without public network access; Linkage control unit: Used to realize alarm-triggered linkage. Only when the sensing terminal or the core control terminal triggers an alarm, the video terminal is woken up to perform secondary confirmation of the abnormality and filter false alarms. Positioning Unit: It adopts a dual mode of "indoor fixed address + outdoor satellite positioning", and reports according to the fixed priority of the scene. The terminal does not perform positioning fusion calculation. The platform simply selects the valid results, taking into account both positioning accuracy and device power consumption. The dual-mode logic of the positioning unit is as follows: when the alarm is triggered in the indoor scene, the preset fixed address is sent; when the outdoor scene or the vital signs terminal is in independent emergency mode, satellite positioning is activated. The terminal does not perform positioning data fusion calculations. The platform simply selects the effective positioning results, subject to the following limiting parameters: outdoor satellite positioning error ≤ 10 meters, response time ≤ 3 seconds. Self-inspection and self-healing unit: Used to periodically test each core module of the system. In case of failure, it automatically reports, automatically switches links, and degrades the system to ensure that the core emergency functions are not interrupted. It only tests core modules such as communication, positioning, and power supply, and does not test redundant functional modules. In case of failure, it automatically reports, automatically switches links, and degrades the system to ensure that the core emergency functions are not interrupted. Subordinate limiting parameters: fault self-healing success rate ≥90%-98%, core control terminal standby time ≥10-20 days.

2. The age-friendly multi-terminal collaborative emergency rescue system according to claim 1, characterized in that: The sensing terminal is connected to a vital signs monitoring terminal and a video terminal. The vital signs monitoring terminal is used to collect the elderly's physiological parameters, detect fall anomalies, and receive manual alarm commands. The video terminal is used to capture abnormal images and conduct two-way voice calls to achieve secondary confirmation of anomalies. It has no redundant functions such as active recognition or constant monitoring. It is only activated when an alarm is triggered to complete local video caching and two-way voice calls to achieve secondary confirmation of anomalies. Video content is not automatically uploaded. It is only uploaded when authorized personnel actively request it. Subordinate limited parameters: default deep sleep, sleep power consumption ≤30-100mW, wake up within 1 second after alarm trigger, and automatically go into sleep within 5-30 seconds after the rescue ends. The video resolution can be adjusted from 720P to 4K. It is only reported after dual-source confirmation is consistent.

3. The age-friendly multi-terminal collaborative emergency rescue system according to claim 1, characterized in that: The core control terminal includes a main control module, a battery module, and a heartbeat detection module; Main control module: Low-power MCU chip with a response latency of ≤0.5-2 seconds, responsible only for core instruction interaction and does not undertake redundant calculations; Battery module: Lithium battery, supports universal charging interface, triggers warning when battery level is below 15%-30%; Heartbeat detection module: Sends a heartbeat signal every 2-5 seconds. If there is no response for 6-15 consecutive seconds, it is considered a device malfunction and is immediately reported.

4. The age-friendly multi-terminal collaborative emergency rescue system according to claim 1, characterized in that: The dual-link communication unit includes a cellular narrowband communication module and a satellite communication module; Cellular narrowband communication module: including but not limited to NB-IoT, Cat.1, 2G / 4G narrowband, communication rate ≥0.5-2kbps, transmission delay ≤3-10 seconds, only transmitting core data; Satellite communication module: including but not limited to Beidou short message service, Tiantong-1, Iridium satellite, positioning accuracy error ≤ 5-15 meters, positioning response time, serving as a backup communication method in scenarios without public network access; Subordinate limited switching logic: When the RSSI of the cellular narrowband communication signal is ≥-95dBm to -105dBm, it is used first. After the signal is lower than the threshold, if the local relay confirms that there is no available forwarding path and the signal has not recovered after a delay of 3 seconds, it will wake up and switch to the satellite communication module. The switching time is ≤5-15 seconds. In case of emergency alarm, both links send data simultaneously.

5. The age-friendly multi-terminal collaborative emergency rescue system according to claim 1, characterized in that: The local short-range wireless connection includes, but is not limited to, BLE Bluetooth, LoRa, ZigBee, UWB, etc. It connects automatically without manual intervention. Subordinate limitation: the vital signs terminal automatically connects when the distance between the vital signs terminal and the core control terminal is ≤20 meters. After the connection is lost, the vital signs terminal automatically switches to independent emergency mode.

6. The age-friendly multi-terminal collaborative emergency rescue system according to claim 1, characterized in that: The application layer, serving as the system's control and emergency response terminal, is specifically subordinate to the following: Family App: Compatible with Android, iOS and other systems, supports alarm reception, video viewing, two-way voice calls and device status viewing; Community platform: Supports equipment status monitoring, alarm handling, and rescue dispatch; can be integrated with community management systems in different regions. Emergency Center Platform: Supports alarm aggregation, 120 emergency medical service linkage, and rescue tracking, and can be connected with provincial and municipal emergency platforms.

7. The method of using the age-friendly multi-terminal collaborative emergency rescue system according to any one of claims 1-6, characterized in that: The specific steps involved in using this method are as follows: S1 device deployment: The core control terminal is wall-mounted in the living room of the elderly person's home (in an easily accessible location), the AI ​​camera is hidden in the corner of the living room, the elderly person wears a vital signs bracelet, and the device is bound to the family APP, community platform, and emergency center platform. After the device is powered on, it automatically completes Bluetooth connection and core module self-test and enters daily monitoring state. S2 Daily Monitoring: The wristband collects heart rate, blood pressure, and blood oxygen data every 30 seconds and synchronizes them to the core control terminal via Bluetooth. The core control terminal then uploads the basic data to the community platform via the NB-IoT module. The AI ​​camera is in deep sleep mode and only receives Bluetooth trigger signals. The core control terminal sends a heartbeat signal every 3 seconds to monitor the connection status of the wristband and camera. S3 Home Abnormal Trigger: When an elderly person suddenly falls, the wristband detects the fall signal and immediately sends an abnormal signal to the core control terminal via Bluetooth. The core control terminal triggers an alarm and simultaneously wakes up the AI ​​camera via Bluetooth. S4 Dual-Source Confirmation: After the AI ​​camera is woken up, the video is cached locally and two-way voice is started. Community platform staff check the elderly’s status through video and ask questions by voice. After confirming the fall is abnormal (no false alarm), the emergency response is initiated. S5 Positioning and Transmission: When the core control terminal detects that the NB-IoT signal is normal, it uses the NB-IoT main link to send alarm information and Beidou positioning data to the community platform and the emergency center platform. Video content is only uploaded when authorized personnel request it. At the same time, alarm information is sent synchronously through dual links (NB-IoT + Beidou short message) to ensure that the information is delivered. S6 Emergency Response: The community platform dispatches rescue personnel to the elderly person's home, and the family members receive an alarm notification through the APP. They can view the on-site video and communicate with the rescue personnel via voice through the APP; the emergency center platform coordinates with 120 emergency services to track the rescue progress in real time. S7 Fault Handling: If the core control terminal detects an interruption in the NB-IoT signal (RSSI < -100dBm), after confirming that there is no forwarding path through the local relay and after a 3-second delay, it automatically switches to the BeiDou short message fallback link to continuously send alarm information and location data to ensure uninterrupted communication. S8 Rescue Ends: After the rescuers arrive at the scene and complete the handling, they send a rescue end command through the community platform. The AI ​​camera returns to deep sleep, the wristband switches to low-frequency acquisition mode, the core control terminal stops alarming, and the system resumes its daily monitoring status.

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