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1. System overview
The elderly have more or less inconveniences in their actions and thinking. They are not as self-care as the young, and they are more prone to accidents in daily life. It is impossible for nursing home service personnel to take care of every elderly person. When an accident occurs to the elderly, it is necessary for the service personnel to find the location of the elderly as quickly as possible and carry out rescue operations. Therefore, it is necessary to adopt an intelligent way to take care of the elderly and realize real-time monitoring of the position of the elderly, so that the elderly can send emergency calls for help in the event of an accident.
Shenzhen Next day combined with the actual situation of nursing homes, based on ZigBee radio frequency technology, developed a nursing home intelligent personnel positioning management system, this system provides a safety guarantee system for the elderly in accident prevention, accident alarm, alarm and rescue, but also improve the nursing home Management efficiency and brand influence attract more high-quality customers to stay.
2. System structure diagram
3. System function
3.1 Real-time positioning
The elderly carry a positioning card, which periodically sends wireless signals. After the base station collects the wireless information of the positioning card, the position information is analyzed, and the position is displayed on the 2D/3D map to realize positioning.Because of its real-time nature, the location information of personnel can be checked at any time
3.2 Track playback
After the system collects the positioning information, the historical track record is formed. The historical information storage period can be set according to the requirements, which can realize the checking of the whereabouts of the elderly
3.3 Emergency call SOS
When an elderly person has an accident and presses the emergency button on the wristband, the system will immediately display the location of the elderly person, as well as the elderly’s personal health status, previous diseases and other related information, which is a quick response for medical staff , Provide guidance for emergency help.
3.4 Long-term immobility alarm:
The unique acceleration sensor function of the wristband card can monitor the movement state of the elderly (still or in motion) in real time, and according to the elderly’s daily routine, you can set which time period is the rest time and which time period is the exercise time, if the system An abnormal static state is detected. If the wristband is in a static state during lunch during the day, there may be a dangerous situation. The system sends out an alarm message to remind the management staff to deal with it.
3.5 Fall alarm:
The acceleration sensing function of the wristband also has a fall monitoring function, and the system will give an alarm for the elderly accidentally falling.
3.6 Regional restrictions
The system can use the base station to divide the area of the nursing home. If a person enters or leaves an area without authorization with a card, or if an elderly person leaves the nursing home without authorization, the system will generate an alarm message.
3.7 Video linkage function
Video surveillance can help managers understand the actual scene of the scene. When there is an SOS alarm, the system controls the camera in the corresponding area, switches to a designated fixed point, and monitors the scene.
4. System characteristics
4.1 Unique wristband terminal
The next day technology wristband has the following functions:
1) Watch function, can display time, date, week, etc., 1.4 inch OLED LCD screen;
2) Positioning function, periodically sending wireless signals to report its real-time position;
3) Emergency button: Press the emergency button in dangerous situations;
4) Motion sensing function: The acceleration sensor can detect whether the state of the elderly is moving or stationary, and can also detect the situation of falling;
5) Anti-release function: conductive silicone wristband, soft material, if it is disassembled, it will alarm;
6) Lithium-ion rechargeable battery, which can be used for 1 month on a single charge.
7) IP65 grade, dustproof and waterproof.
4.2 Full coverage of signal
The coverage range of each base station can reach more than 100 meters (visual distance), so the cost of realizing full coverage of the signal is low.
4.3 High reliability
The system adopts a collision avoidance strategy, so that a single base station can simultaneously recognize 200 positioning cards moving at 60km/h, and can realize no missing cards in multi-card recognition, ensuring the reliability of the system.
4.4 High positioning accuracy
Compared with traditional RFID technology, the system has higher positioning accuracy. RFID can only be used for area identification (no signal strength value, so distance cannot be calculated), while ZigBee takes advantage of its RSSI value (signal strength value), namely It can realize regional positioning, as well as linear positioning and planar positioning, with a positioning accuracy of 3-10 meters.
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