Proposal of Indoor Positioning System\nBased on Sound Waves with Band-pass Filter

カテゴリ: 国際会議

論文No: PS-07

グループ名: ACIS2015

発行日: 2015/10/15

著者名(英語): Kai Iwasaki(Kanagawa Institute of Technology), Shigenori Ioroi(Kanagawa Institute of Technology)

キーワード: positioning methods, sound waves,smartphone

要約(英語): A high positioning accuracy is required more for indoors than for outdoors. However, currently, positioning methods that use radio waves are often used in indoor positioning, and the accuracy is between 3 to 10 m. Therefore, we propose an indoor positioning method that uses high frequency sound waves. The proposed system uses four or more speakers. The frequencies of the sound issued from the speakers are different and are determined in advance. These speakers put out momentary sound at the same time. A smartphone used as a client (hereafter, client) records the sound with a built-in microphone. The client decomposes the recorded sound by using a band pass filter and obtains the difference between the sounds of the reception time of each frequency. Then, the client calculates its current location by using the speaker position and the difference between the arrival times of sound. The user of this system does not need to provide any special equipment and can use this positioning system with his or her own smartphone. This system does not communicate with servers since the client calculates its own position. Therefore, it can also be used in places that forbid the use of radio waves. In the results of an experiment, the distance accuracy error was 1.84 cm (standard deviation of 0.36 cm), and the positioning accuracy had an error of 10.60 cm.

原稿種別: 英語

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