Monitoring and alarming system for old people

Abstract

The utility model provides a monitoring and alarming system for old people, and relates to the technical field of monitoring and alarming for old people. The system comprises a plurality of event areas, wherein each event area is provided with at least three Bluetooth beacons and cameras; the wearable device is used for collecting motion state data of the elderly and receiving signal intensity information of the Bluetooth beacon through the Bluetooth module; the beacon host determines an event area where the wearable device is located according to the signal intensity information; the control host is used for judging whether the old person falls down or not according to the motion data, controlling the alarm circuit to send alarm information to the user terminal, and controlling the camera in the corresponding area to carry out video recording according to the event area determined by the beacon host. The system solves the problems that in the prior art, an alarm triggering mechanism is unreliable, the false alarm rate is high, the state of the elderly cannot be accurately judged, linkage with the activity area is lacked, and early warning for the lost state is lacked, and the safety guarantee of the home life of the elderly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elderly monitoring alarm, in particular to an elderly monitoring alarm system. Background Art

[0002] With the increasing aging of society, how the elderly, especially those living alone or with limited mobility, can quickly and accurately send out distress signals and receive timely assistance when unexpected situations such as falls and sudden illnesses occur has become a social problem that needs to be urgently addressed.

[0003] At present, there are some alarm products for emergency situations of the elderly on the market. For example, some simple emergency pagers need to be manually triggered by the elderly to send out a distress signal. However, if the elderly lose consciousness or ability to move, such products are useless. There are also some alarm devices that use a single sensor for fall detection. Although they can automatically trigger the alarm, they are easily disturbed by daily activities, resulting in a high false alarm rate. These devices can often only detect specific types of events and have relatively simple functions. There are also some tracking devices that use GPS positioning to provide the location information of the elderly, but the positioning accuracy is poor in indoor environments, and it is impossible to accurately determine whether the elderly have encountered an accident that requires emergency assistance.

[0004] In order to improve the accuracy of alarms, some solutions have proposed to judge events by combining multiple sensors, such as combining acceleration sensors and gyroscope sensors to detect falls. However, these solutions usually only focus on the detection of specific events, lack the perception of the elderly's activity areas and the linkage with the environment, and lack the early warning mechanism for abnormal situations such as the elderly losing contact, resulting in insufficient timeliness and comprehensiveness of alarms. In addition, although some systems based on video surveillance can provide more intuitive information, there is a risk of privacy leakage, and they require continuous attention from dedicated personnel, which is costly and difficult to use as a generally applicable alarm solution.

[0005] Therefore, it is necessary to improve the existing elderly monitoring alarm technology to overcome the defects of the existing technology. Utility Model Content

[0006] The purpose of the utility model is to provide an elderly monitoring alarm system, which sets multiple event areas including Bluetooth beacons and cameras, uses wearable devices to collect the elderly's motion status data and receives the signal strength information of the Bluetooth beacons through a Bluetooth module, combines the beacon host to determine the event area where the wearable device is located according to the signal strength information, and controls the host to determine whether the elderly has fallen according to the motion data and performs a linkage alarm structure, so as to overcome the problems of unreliable alarm triggering mechanism, high false alarm rate, inability to accurately judge the elderly's status, lack of linkage with the activity area and lack of early warning of lost connection status in the prior art.

[0007] An elderly monitoring alarm system, comprising:

[0008] A plurality of event areas, each event area including at least three Bluetooth beacons and cameras;

[0009] A wearable device, comprising a first controller, a first Bluetooth module, a motion data acquisition circuit, a satellite positioning unit and a first wireless communication module, wherein the motion data acquisition circuit is used to collect motion status data of an elderly person, and the first Bluetooth module is used to receive signal strength information transmitted by the Bluetooth beacon;

[0010] A beacon host is connected to the first Bluetooth module for communication, and obtains and determines the event area where the wearable device is located through the signal strength information;

[0011] A control host, comprising a second wireless communication module, a second controller, a memory and an alarm circuit, wherein the control host is communicatively connected with the beacon host and the wearable device, and the second controller is respectively connected with the second wireless communication module, the camera, the alarm circuit and the memory;

[0012] The alarm circuit includes a network module, and the network module is used to connect to a user terminal;

[0013] The second controller is used to receive and determine whether the elderly person has fallen down according to the motion state data, and if it is determined that the elderly person has fallen down, control the alarm circuit to send an alarm message to the user terminal;

[0014] The second controller is also used to control the camera in the corresponding event area to record video according to the event area where the wearable device is located determined by the beacon host.

[0015] Furthermore, the motion data acquisition circuit includes an acceleration sensor and a gyroscope sensor, and the second controller is used to determine whether the elderly person falls based on the acceleration data and angular velocity data collected by the acceleration sensor and the gyroscope sensor.

[0016] By combining the data from the acceleration sensor and the gyroscope sensor, the movement status of the elderly can be more comprehensively perceived. Compared with a single sensor, it can more accurately distinguish between normal activities and fall events, effectively reducing the false alarm rate and improving the accuracy of fall judgment.

[0017] Furthermore, a fall judgment threshold is preset in the second controller. When the change amplitude of the acceleration data and the angular velocity data exceeds the fall judgment threshold, the second controller determines that the elderly person has fallen.

[0018] By setting the fall judgment threshold, the collected data can be analyzed more finely to avoid misjudging slight movement changes as falls, further reducing the false alarm rate and improving the practicality and reliability of the system.

[0019] Furthermore, the beacon host includes a third controller and a second Bluetooth module connected to the third controller, and the third controller is used to perform collaborative positioning according to the signal strength of the multiple Bluetooth beacons received to determine the event area where the wearable device is located.

[0020] By adopting collaborative positioning technology, we can make full use of the signal strength information of multiple Bluetooth beacons, improve positioning accuracy, and more accurately determine the event area where the elderly are located, making the alarm more targeted and facilitating quick and accurate rescue.

[0021] Furthermore, the beacon host also includes a network port for wired connection to a local area network or a WiFi module for wireless connection to a local area network.

[0022] The beacon host can be flexibly connected to the network, facilitating data transmission and remote control of the system, improving the scalability and convenience of the system, and also facilitating linkage with other smart home devices.

[0023] Furthermore, the wearable device also includes a distress button, which is used to send an emergency distress signal to the second controller. When the distress button is triggered, the first controller sends the emergency distress signal to the control host through the first Bluetooth module or the first wireless communication module. After receiving the emergency distress signal, the second controller controls the alarm circuit to send emergency distress information to the user terminal.

[0024] It provides the elderly with a way to actively trigger an alarm. When the elderly can sense danger but cannot act, they can seek help by pressing the call button, which improves the system's emergency response capabilities and provides an extra layer of safety for the elderly.

[0025] Furthermore, the first wireless communication module and the second wireless communication module are one or more of a WiFi module, a 4G module or a 5G module.

[0026] The system can select the appropriate wireless communication method according to the actual application scenario to ensure the reliability and stability of data transmission, thereby enhancing the adaptability and scalability of the system.

[0027] Furthermore, the wearable device also includes a power management unit and a battery for powering the power management unit, wherein the power management unit is used to monitor the power level of the battery and send a low power alarm signal to the control host when the power level of the battery is lower than a preset value.

[0028] Remind users in time to replace batteries or charge them to avoid system failure due to power exhaustion, thus ensuring the continuous operation and reliability of the system.

[0029] Furthermore, when the wearable device fails to establish a connection with the Bluetooth beacon within a preset time, the beacon host determines that the wearable device is in a lost state and sends the lost state information to the control host. After receiving the lost state information, the second controller controls the alarm circuit to send a long-term lost connection alarm message to the user terminal.

[0030] It can send out an alarm in time when the elderly walk out of the Bluetooth signal coverage or the device fails, avoiding the danger caused by long-term loss of connection, and further improving the safety and reliability of the system.

[0031] Furthermore, the satellite positioning unit is in a closed state by default. When the first Bluetooth module is disconnected, the first controller enables the satellite positioning unit and sends the acquired location information to the control host.

[0032] In areas where Bluetooth signals cannot cover or when the Bluetooth module fails, the location information of the elderly can be obtained through satellite positioning. As a supplementary positioning method, it improves the reliability of the system and the coverage of positioning. At the same time, the satellite positioning unit is turned off by default, which also helps to reduce the power consumption of wearable devices and extend the battery life.

[0033] The beneficial effects of the utility model are:

[0034] The utility model provides an elderly monitoring alarm system, which sets multiple event areas, each of which contains at least three Bluetooth beacons and cameras, collects the elderly's motion status data using a wearable device and receives the signal strength information of the Bluetooth beacon through a Bluetooth module, and the beacon host determines the event area where the wearable device is located based on the signal strength information, and the control host determines whether the elderly has fallen based on the motion data and performs a linkage alarm. Compared with the prior art, the system has the following beneficial effects:

[0035] First, by setting up multiple Bluetooth beacons, the indoor space can be divided into zones, which can more accurately locate the activity range of the elderly;

[0036] Second, the motion status data collected by wearable devices can be used to determine whether the elderly have experienced accidents such as falls, effectively reducing the false alarm rate;

[0037] Third, through the beacon host's analysis of the signal strength, the specific event area where the elderly person is located can be determined, the alarm information can be associated with the location information, and accurate location guidance can be provided for rapid rescue;

[0038] Fourth, the binding of cameras and event areas enables the cameras in the corresponding areas to record videos when an alarm is triggered, providing effective evidence for post-event analysis.

[0039] To sum up, the elderly monitoring alarm system provided by the utility model solves the problems in the prior art of unreliable alarm triggering mechanism, high false alarm rate, inability to accurately judge the status of the elderly, and lack of linkage with activity areas, thereby improving the safety of the elderly's home life. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of an elderly monitoring alarm system provided in an embodiment of the present application;

[0041] Figure 2 It is a system connection block diagram of the elderly monitoring alarm system provided in the embodiment of the present application; DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0043] Example 1

[0044] like Figure 1 , Figure 2 As shown, this embodiment provides an elderly monitoring alarm system, which includes: multiple event areas, wearable devices, a beacon host and a control host.

[0045] Event area settings:

[0046] In this embodiment, taking a typical three-bedroom and two-living room residence as an example, the entire residence is divided into five event areas, namely: bedroom A, bedroom B, bedroom C, living room and bathroom. At least three Bluetooth beacons and one camera module are installed in each event area. The Bluetooth beacon adopts the iBeacon protocol, has the characteristics of low power consumption and stable signal, and the model can be selected as Feasycom FSC-BP104B, which supports the iBeacon protocol and adopts the TICC2640R2F chip. It has the characteristics of high performance and low power consumption, and the transmission distance can reach more than 100 meters. The camera adopts the OV2640 camera module, which supports 2 million pixels and DVP interface, and can provide basic video surveillance images. The DVP interface of each camera module is connected to the camera switching chip input terminal of the control host through a cable.

[0047] The installation location of the Bluetooth beacon needs to be selected according to the specific layout of the room to ensure that the signal can cover the entire event area, and a certain distance is maintained between the three beacons to improve positioning accuracy. For example, in each bedroom and bathroom, three Bluetooth beacons are installed on the ceiling of the three corners of the room, about 2.5 meters above the ground; in the living room, three Bluetooth beacons are installed on the ceiling of the three corners of the living room, about 2.8 meters above the ground. The camera module is installed on the wall of each room, about 2.2 meters above the ground, to ensure that the main activity area of ​​the room can be captured.

[0048] The structure of wearable devices:

[0049] The wearable device includes a first controller, a first Bluetooth module, a motion data acquisition circuit, a satellite positioning unit, a first wireless communication module, a distress button and a power management unit.

[0050] First controller: It uses a low-power ARMCortex-M4 series microprocessor, model STM32L476RGT6, which has the characteristics of high performance and low power consumption, with a main frequency of up to 80MHz and a rich peripheral interface, which can meet the control and data processing requirements of the system. The first controller is responsible for the control and data processing of the entire wearable device, including data acquisition, data transmission, power consumption management, etc.

[0051] The first Bluetooth module: A low-power Bluetooth module supporting Bluetooth 5.0 is used, model Nordic nRF52832, which is based on the ARM Cortex-M4 core, has excellent RF performance and low power consumption, supports multiple Bluetooth protocols, and can achieve stable communication with Bluetooth beacons. The first Bluetooth module is used to receive the signal strength information (RSSI) transmitted by the Bluetooth beacon and communicate with the beacon host.

[0052] Motion data acquisition circuit: includes a three-axis acceleration sensor and a three-axis gyroscope sensor. The acceleration sensor model is Bosch BMI160, and the gyroscope sensor model is InvenSense ICM-20602. Both sensors are six-axis MEMS sensors with high precision and low noise, and can accurately collect the motion status data of the elderly. The three-axis acceleration sensor and the three-axis gyroscope sensor are connected to the first controller through the I2C interface or the SPI interface, and the collected acceleration data and angular velocity data are transmitted to the first controller.

[0053] Satellite positioning unit: A module supporting GPS and BeiDou dual-mode positioning is used, model NEO-M8N, which supports multiple satellite navigation systems such as GPS, GLONASS, BeiDou, Galileo, etc. It has the characteristics of high sensitivity and fast positioning, and can provide positioning information in areas where Bluetooth signals cannot cover. The satellite positioning unit is connected to the first controller through the UART interface.

[0054] First wireless communication module: In this embodiment, a WiFi module and a 4G module are used. The WiFi module model is Espressif ESP8266, and the 4G module model is QuectelEC20. The first wireless communication module is used to communicate with the control host and provide a channel for data upload and command issuance. The WiFi module is connected via a UART interface. The 4G module is connected via a UART or USB interface.

[0055] SOS button: It is a physical button that uses a patch-type touch switch, model TS-1187R-B, with good feel and reliability. The SOS button is set on the surface of the wearable device, which is convenient for the elderly to trigger. One end of the SOS button is connected to the GPIO pin of the first controller, and the other end is grounded. When the SOS button is pressed, the level of the GPIO pin changes. After the first controller detects the change, it triggers the emergency call process.

[0056] Power management unit: responsible for managing the power supply of the wearable device, including battery power monitoring and low-power alarm functions. The power supply is powered by a rechargeable lithium battery with a battery capacity of 300mAh and a voltage of 3.7V. The core chip model of the power management unit is TIBQ24072T, which is a highly integrated lithium battery charging and power path management chip that supports USB charging and power path management, and can effectively extend battery life. The power management unit is connected to the first controller through the I2C interface to transmit the battery power information to the first controller. The wearable device is charged through the USB Type-C interface. The wearable device is provided with a USB Type-C interface for connecting to a charger for charging. This interface is connected to the internal battery through the TIBQ24072T charging management chip.

[0057] Wearable devices can be designed as wristbands, which are convenient for the elderly to wear. The wristband is made of silicone material, which has good skin-friendliness and durability.

[0058] The structure of the beacon host:

[0059] The beacon host includes a third controller, a second Bluetooth module, an Internet port and a WiFi module.

[0060] The third controller: STM32F407VGT6 is used. This chip is a high-performance microcontroller based on the ARMCortex-M4 core, with a main frequency of 168MHz, 1MBFlash and 192KBRAM, as well as multiple UART, SPI, I2C interfaces and an Ethernet MAC, which can meet the data processing and communication needs of the beacon host. (You can also choose STM32F429ZIT6, which has a main frequency of 180MHz, 2MBFlash, 256KBRAM, and an LCD controller, or STM32H743VIT6, which has a main frequency of 480MHz, 2MBFlash, 1MBRAM, and stronger performance. You can choose the appropriate model according to actual needs)

[0061] The second Bluetooth module: uses a Bluetooth module that supports Bluetooth 5.0, model Nordic nRF52832, which is the same as the first Bluetooth module in the wearable device, ensuring the compatibility and stability of communication. The second Bluetooth module is used to communicate with the first Bluetooth module of the wearable device and receive the signal strength information of each Bluetooth beacon sent by it. The second Bluetooth module is connected to the third controller (STM32) through the UART interface.

[0062] Network port: 10 / 100Mbps adaptive Ethernet interface, supporting IEEE802.3 standard, used to connect to the LAN via wired mode. Both STM32F407VGT6 and STM32F429ZIT6 integrate Ethernet MAC, and can be connected to an external PHY chip (such as DP83848) to achieve Ethernet communication.

[0063] WiFi module: A WiFi module supporting IEEE802.11b / g / n, such as ESP8266, is used to connect to the local area network wirelessly. The WiFi module is connected to the third controller (STM32) through a UART interface.

[0064] The beacon host is connected to the home router through the network port and / or WiFi module and accesses the local area network.

[0065] The structure of the control host:

[0066] The control host includes a second controller, a camera switch chip, a second wireless communication module, a memory and an alarm circuit.

[0067] Second controller: MCIMX6Y2CVM05AB of NXPi.MX6ULL series is used. This chip is a high-performance, low-power processor based on ARMCortex-A7 core, with a main frequency of 528MHz, rich peripheral interfaces and excellent connection performance, which can meet the overall control, data processing, fall judgment, linkage control and other requirements of the system, and has higher cost performance and lower power consumption. The processor has a DVP camera interface for receiving the video signal output by the camera switching chip.

[0068] Camera switching chip: The control host integrates multiple CBT3257 camera switching chips (determined by the number of cameras. For example, 5 cameras can use 2 4-to-1 CBT3257s, where the output of one CBT3257 is connected to the input of another CBT3257, and the final output is connected to the DVP interface of the second controller) to select camera signals from different event areas.

[0069] Second wireless communication module: In this embodiment, the same WiFi module EspressifESP8266 as the first wireless communication module is used to communicate with the wearable device and the beacon host.

[0070] Memory: includes RAM and Flash, used to store program code, operating data, video recordings, etc.

[0071] Alarm circuit: includes a network module for connecting to a user terminal (such as a mobile phone APP). The network module can use a 4G / 5G module, model QuectelEC20, which is the same as the 4G module in wearable devices, ensuring the compatibility and stability of communication. The alarm circuit also includes a buzzer drive circuit for sounding an audible alarm when the alarm is triggered. The buzzer model is TMB12A05, and the driver chip is ULN2003, which is a commonly used Darlington array chip.

[0072] The control host controls the camera switching chip CBT3257 through the GPIO interface and selects the corresponding camera channel.

[0073] The connection method of the CBT3257 switching chip inside the control host:

[0074] The four input terminals of each CBT3257 are respectively connected to the DVP signal lines (including data line, clock line, field synchronization and line synchronization signal lines) of the camera modules from different event areas.

[0075] If the number of cameras exceeds the number of inputs of a CBT3257, multiple CBT3257s need to be cascaded. For example, 5 cameras can use 2 4-to-1 CBT3257s, connect the output of one CBT3257 to an input of another CBT3257, and finally connect the output of the second CBT3257 to the DVP interface of the second controller.

[0076] The output end of the cascaded CBT3257 is finally connected to the DVP interface of the second controller.

[0077] The second controller outputs a control signal through the GPIO interface, which is connected to the control end (eg, A and B pins) of each CBT3257 to select which camera signal is output to the DVP interface.

[0078] System workflow:

[0079] Initialization: After the system is powered on, each device is initialized. The first Bluetooth module of the wearable device begins to receive the signal strength information of the surrounding Bluetooth beacons, and the motion data acquisition circuit begins to collect acceleration data and angular velocity data. The beacon host begins to monitor the Bluetooth signal strength information sent by the wearable device. The control host establishes a wireless connection with the beacon host and the wearable device, and configures the GPIO interface to control the camera switching chip.

[0080] Data collection: The motion data collection circuit of the wearable device continuously collects the motion status data of the elderly and sends the data to the first controller through the SPI interface or the I2C interface. After the first Bluetooth module receives the signal strength information of each Bluetooth beacon, it sends it to the beacon host through the UART interface.

[0081] Regional positioning: After the third controller (STM32) of the beacon host receives the signal strength information of multiple Bluetooth beacons sent by the wearable device, it uses the pre-stored indoor map and collaborative positioning algorithm (such as three-sided positioning algorithm, weighted three-sided positioning algorithm or RSSI-based fingerprint positioning algorithm) to calculate the event area where the wearable device is located, and sends the positioning result to the control host via a wired network or WiFi.

[0082] Fall judgment: After the second controller of the control host receives the motion state data sent by the wearable device, it judges whether the elderly person has fallen according to the preset fall judgment threshold. For example, when the change amplitude of the acceleration data and the angular velocity data exceeds the preset threshold, it is judged that the elderly person has fallen. The specific fall judgment algorithm can adopt a threshold-based method, a machine learning-based method, etc.

[0083] Linked alarm: When the second controller determines that the elderly person has fallen, the network module that controls the alarm circuit sends an alarm message to the pre-bound user terminal (such as the mobile phone APP of the elderly person's family) through the 4G / 5G network. At the same time, according to the positioning result sent by the beacon host, the control host controls the camera switching chip CBT3257 integrated in it through GPIO, selects the camera channel of the corresponding event area, and reads the camera data through the DVP interface, and stores the video data in the memory. At the same time, the control host can also control the buzzer of the alarm circuit to sound an alarm.

[0084] Emergency call: When the elderly press the call button on the wearable device, the first controller sends an emergency call signal to the control host through the first wireless communication module (WiFi or 4G module). After receiving the signal, the control host controls the alarm circuit to send an emergency call message to the user terminal, and links the camera in the corresponding event area to record (the control host controls the camera switching chip CBT3257 integrated inside through GPIO, selects the camera channel of the corresponding event area, and reads the camera data through the DVP interface, and stores the video data in the memory).

[0085] Loss of connection warning: The beacon host continuously monitors the connection status with the wearable device. When the wearable device fails to establish a connection with the Bluetooth beacon within a preset time (e.g. 5 minutes), the beacon host determines that the wearable device is in a lost state and sends the lost connection information to the control host. After the control host receives the lost connection information, the control alarm circuit sends a long-term lost connection alarm information to the user terminal.

[0086] Low battery alarm: The power management unit of the wearable device monitors the battery power in real time. When the power is lower than the preset value (for example, 20%), a low battery alarm signal is sent to the control host. After receiving the low battery alarm signal, the control host sends a low battery reminder message to the user terminal, prompting the user to charge the wearable device in time.

[0087] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0088] In addition, it should be noted that the use of terms such as "first" and "second" to limit is only for the convenience of distinction. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0089] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An elderly monitoring alarm system, comprising a wearable device, characterized in that: include: A plurality of event areas, each event area including at least three Bluetooth beacons and cameras; The wearable device includes a first controller, a first Bluetooth module, a motion data acquisition circuit, a satellite positioning unit and a first wireless communication module, wherein the motion data acquisition circuit is used to collect motion status data of the elderly, and the first Bluetooth module is used to receive signal strength information transmitted by the Bluetooth beacon; A beacon host is connected to the first Bluetooth module for communication, and obtains and determines the event area where the wearable device is located through the signal strength information; A control host, comprising a second wireless communication module, a second controller, a memory and an alarm circuit, wherein the control host is communicatively connected with the beacon host and the wearable device, and the second controller is respectively connected with the second wireless communication module, the camera, the alarm circuit and the memory; The alarm circuit includes a network module, and the network module is used to connect to a user terminal; The second controller is used to receive and determine whether the elderly person has fallen down according to the motion state data, and if it is determined that the elderly person has fallen down, control the alarm circuit to send an alarm message to the user terminal; The second controller is also used to control the camera in the corresponding event area to record video according to the event area where the wearable device is located determined by the beacon host.

2. The elderly monitoring alarm system according to claim 1 is characterized in that: The motion data acquisition circuit includes an acceleration sensor and a gyroscope sensor, and the second controller is used to determine whether the elderly person falls according to the acceleration data and angular velocity data collected by the acceleration sensor and the gyroscope sensor.

3. The elderly monitoring alarm system according to claim 2 is characterized in that: A fall judgment threshold is preset in the second controller. When the variation range of the acceleration data and the angular velocity data exceeds the fall judgment threshold, the second controller determines that the elderly person has fallen.

4. The elderly monitoring alarm system according to claim 1 is characterized in that: The beacon host includes a third controller and a second Bluetooth module connected to the third controller, and the third controller is used to perform collaborative positioning according to the signal strength of the multiple Bluetooth beacons received to determine the event area where the wearable device is located.

5. The elderly monitoring alarm system according to claim 1 is characterized by: The beacon host also includes a network port for wired connection to a local area network or a WiFi module for wireless connection to a local area network.

6. The elderly monitoring alarm system according to claim 1 is characterized by: The wearable device also includes a distress button, which is used to send an emergency distress signal to the second controller. When the distress button is triggered, the first controller sends the emergency distress signal to the control host through the first Bluetooth module or the first wireless communication module. After receiving the emergency distress signal, the second controller controls the alarm circuit to send emergency distress information to the user terminal.

7. The elderly monitoring alarm system according to claim 1 is characterized by: The first wireless communication module and the second wireless communication module are one or more of a WiFi module, a 4G module or a 5G module.

8. The elderly monitoring alarm system according to claim 1 is characterized by: The wearable device also includes a power management unit and a battery for powering the power management unit. The power management unit is used to monitor the power level of the battery and send a low power alarm signal to the control host when the power level of the battery is lower than a preset value.

9. The elderly monitoring alarm system according to claim 1 is characterized by: When the wearable device fails to establish a connection with the Bluetooth beacon within a preset time, the beacon host determines that the wearable device is in a lost connection state and sends the lost connection state information to the control host. After receiving the lost connection state information, the second controller controls the alarm circuit to send a long-term lost connection alarm message to the user terminal.

10. The elderly monitoring alarm system according to claim 1, characterized in that: The satellite positioning unit is in a closed state by default. When the first Bluetooth module is disconnected, the first controller enables the satellite positioning unit and sends the acquired location information to the control host.

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