Name of 1. work: Wisdom Guardian-Accidental Fall Alarm and Positioning System for the Elderly Introduction of 2. works: Intelligent Guardian-Accidental Fall Alarm and Positioning System for the Elderly (WeChat applet version) is an intelligent device specially designed for the elderly. It realizes interaction with users through WeChat applet and monitors the geographical location and activity status of the elderly in real time. In the event of an abnormal situation such as a fall, the system will immediately send an alarm message to the preset emergency contact, and display the detailed location information of the elderly, so that rescuers can rush to the scene in time. The system uses wireless sensor network technology, which has the advantages of easy installation, low cost, strong real-time and so on, and provides a strong guarantee for the safety of the elderly. 3. works function: 1. Real-time monitoring of the geographical location of the elderly: through the GPS positioning chip installed on the elderly, the geographical location information of the elderly is obtained in real time, and the information is sent to the server. 2. Activity state monitoring: through the built-in acceleration sensor and gyroscope, monitor the activity state of the elderly, such as walking speed, posture, etc., to ensure the safety of the elderly. 3. Fall alarm function: When the elderly fall is detected, the system will immediately send alarm information to the preset emergency contact, including the elderly's name, contact information, current location and other information. 4. Voice call function: The system supports voice calls with smart watches and other devices to facilitate the elderly and their families to keep in touch at any time. 5. Electronic fence function: Users can set a safe area through WeChat applet. Once the elderly leave the area, the system will immediately send an alarm message. 6. Low power consumption function: When the power of the device is lower than the set value, the system will automatically send a low power reminder to the user to ensure the normal operation of the device. Even if the power is turned off, the ink screen will maintain the display to ensure the operation of the basic functions of the device. 4. works to achieve the principle: 1. Hardware part: mainly includes GPS positioning chip, acceleration sensor, gyroscope, ink screen and so on. 2. Software part: mainly includes data acquisition, data processing, data storage, data transmission and other functional modules. Users can install, bind and unbind the equipment through WeChat applet, as well as view the location information and activity status of the elderly. The WeChat applet uses the user base and convenience of the WeChat platform to provide users with a convenient experience. Advantages of 5. works: 1. Strong real-time: Through real-time monitoring of the location and activity status of the elderly, to ensure timely detection of abnormal situations. 2. Timely alarm: In the event of an abnormal situation such as a fall, the system will immediately send an alarm message to the preset emergency contact person to improve rescue efficiency. 3. Easy installation: The equipment is small in size, easy to install, and can be completed without professionals. 4. Low cost: the use of wireless sensor network technology, greatly reducing the cost of equipment. 5. High reliability: The device has a low battery reminder function and a power-down save function to ensure the normal operation of the device at critical moments.