RFID smart tags can be divided into Low Frequency, High Frequency, Ultra High Frequency and Microwave based on the technical characteristics of different Frequency bands. Can also be classified according to passive RFID products, active RFID products, semi-active RFID products.Semi-active RFID products, combined with the advantages of active RFID products and passive RFID products, make the advantages of microwave 2.45g, 433M and WIFI under the trigger of Low frequency 125KHZ, and combine a 13.56m High frequency card for all-in-one card, which should be the most extensive in the existing pension and health care system. Semi-active RFID technology, also known as low-frequency activation and trigger technology, USES low-frequency short-range accurate positioning, microwave remote identification and data upload to solve the function that simply active RFID and passive RFID cannot achieve. Simply put, it is short range activation location, long range recognition and upload data. The tags are made into wristbands or pendants for easy wearing. ISO/IEC formulates air interface protocols of five frequency bands to regulate information interaction between RFID sensors and smart tags.
RFID induction equipment is often installed in the identification area, such as the door of the elderly apartment, the ceiling of the building, the elderly community outside the column and so on, to identify the intelligent tag information in a certain area, for identity authentication and positioning, and the received information, through the support system transmission to the background.
The support module and application module mainly collect and analyze the sensor equipment and label data, further process, and propose docking interface for people to use, which is the core of the elderly health care system. The wristband (pendant) tag can intermittively send information to the induction device in the area and send real-time dynamic information to its management center. Once the information of the elderly is not uploaded to the system management center, an alarm will be issued to remind the staff to check the activity track of the elderly in the previous stage and deal with emergencies in a timely manner. RFID tags are basically equipped with emergency call SOS function. When the elderly need help, just press the emergency call button on the RFID tag, and the nursing staff can accurately locate, quickly respond and help based on GIS.If the elderly is in the state of illness, the system can quickly call out the case, health record and life record of the elderly according to the situation, and provide necessary information to deal with such an emergency. The SOS alarm function will also activate the video monitoring system, control the cameras in the corresponding area, switch to the designated direction, display the scene screen, and provide accurate video information for the management personnel. If the elderly need special care, the management staff will record the information in the system and send it to all the nursing staff. The nursing staff can read the label of the elderly through the RFID sensor worn by them, so as to facilitate personalized service. In addition to the above applications, it also includes functions such as apartment access control, community restaurants, entertainment and fitness venues identity authentication.
At present, RFID tags worn by the elderly are mostly one-way upload data, only limited to help, personnel positioning and one-card functions, without active event reminder function. Passive UHF induction equipment prices of the 900 m, 2.4 G active electronic tags and label themselves overweight issues, the lack of industry standards and indoor wireless radio frequency devices is overmuch, may cause electromagnetic spectrum is very crowded, multiple induction equipment frequently repeated reading labels, takes up the communication channel and server resources, part of the rf signal may be absorbed by the body or metal block, how to assign a alarm signal to the appropriate medical institutions, the wireless signal radiation effect on the old man body, etc., are tricky, hinder the actual problems of the application of RFID technology in the elderly care. So if RFID tags can be integrated with health-related wearable devices, it will provide more help for the elderly.
The intelligent system combined with RFID technology provides important support for the independent life of the elderly, can help the elderly solve various problems in daily life, and improve the confidence of the elderly in independent life. However, all the systems have some limitations, which urgently need the participation of professional large technology companies and relevant industry experts. It is necessary to formulate equipment docking standards, reduce the system cost, and more importantly, it is necessary to develop technology and legal norms to provide support for further exploration and research of RFID technology in elderly health care application.