Demonstration experiment for the early detection method of wandering dementia patients by using GNSS: Probability of a positional estimation by GNSS which examinee has in indoor

摘要

Japan has a continuously increasing population of elderly people aging 65 years old and older. At the same time, the number of dementia patients has been increasing. Therefore, the number of missing people among dementia patients has been holding a high record. A lot of reports and information about accidents and troubles in relation to dementia patient has been reported. The patient's family has big problems that the patient may cause an accident and trouble. In the research, we proposed the early detection method of wandering dementia patients by using GNSS logger and smartphone. First step in the research, obtaining their behavior route using GNSS logger and smartphone beforehand, it conducted behavioral analysis based on saved data. Those results are utilized for identification of the main purpose of wandering and a discovery in case of disappearance. We will be doing a demonstration experiment of it with the cooperation of dementia patients. However, it is not possible to conduct the experiment because of COVID-19 now, so this research conducted preliminary experiment using GNSS logger and smartphone. Positional information in indoors are obtained by simultaneously on GNSS logger and smartphone. Our results showed that each equipment could obtain positional information indoors, but there were some differences. In addition, it was found that using smartphones made it possible to easily obtain positional information of indoor more than GNSS logger.