| Summary: | 碩士 === 國立臺北科技大學 === 電子工程系 === 106 === In patients with dementia often have symptoms such as negative emotions, cognitive decline, and abnormal mental behaviors, often accompanied by problems such as loss and mobility disorders. According to the statistics of the Police Department, the proportion of elderly people with dementia accounted for 41.61% of the total number of elderly people missing in 2016, and it increased year by year. The literature also pointed out that more than 90% of people may have signs of dementia or the initial patients are still living at home, so the possibility of loss near the home will increase significantly, and the resulting behavior will become increasingly serious.
Todays demented care uses IoT technology to connect wearable devices to sensors and transmit data via Wi-Fi or low-power Bluetooth. However, current communication technologies have limitations on distance, resulting in low reliability and security of data. In recent years, the emergence of low-power IoT technology has improved the transmission distance and reliability of data. Therefore, in this study, we used nRF52832 to develop a Narrow-Band Internet of Things wireless technology locator for use in dementia care service, using less network bandwidth, wide coverage, low cost, low power consumption, etc. features, capture sensory data of the wearers wearable sensor, record the users current location, and send measured data by the device back to the server for processing and storage. With the concept of prime time for emergency medicine, the aim is to improve the efficiency of instant care and long distance and low power consumption, further test the stability of the connection between the device and the server, the distance of data transmission, and the presentation of the visual interface. Collect test data explore the feasibility of applying the device in dementia care.
The results of this study show that the connection between the device and the server is stable, and the data transmission between multiple devices does not interfere with each other and can be maintained at a transmission time of about 2 seconds. It is confirmed that the User Equipment(UE) device can transmit the users sensing parameters, emergency help and other information in a very short time, thereby reducing the risk of injury to the patient. The GPS coordinates can clearly indicate the route of travel, and the effective connection distance with the base station can reach 2.7 km away, so as to quickly find the lost patient. In the state where the existing function is turned on, the standby power consumption is 30 mA, the power consumption during the data transfer process is 100 mA, and in receive data is consumed only 40 mA, which means that the device can be applied to dementia care and tracking the patients loss is feasible.
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