| Presentation | 2020-03-03 Design and Evaluation of a Wi-Fi Backscatter Sensor for Activity Recognition Toru Maeda, Akira Uchiyama, Teruo Higashino, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Human activity recognition (HAR) has been attracting people for ubiquitous systems such as healthcare, elderly care, and so on. HAR usually uses smartphones and smartwatches. However, those devices require maintenance for battery charge or replacement. To overcome this problem, we design a Wi-Fi backscatter sensor for ultra-low-power HAR. Backscatter sensors are attached to parts of human bodies (e.g., arms and shoes) and wearable things such as bags and nametags. To change states of the generation of backscatter signals, we employ physical switching by human motions. Then, we extract human motions by observing the shifts in the state of the existence of the backscatter signal. To investigate the feasibility of HAR, we develop a pedometer by the backscatter sensor. From the evaluation results, we have confirmed that the backscatter signal is detectable in a $3.5m times 7m$ room, and the step count error is up to 2% with 5.2 $mu$W energy consumption. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | |
| Paper # | SeMI2019-134 |
| Date of Issue | 2020-02-24 (SeMI) |
| Conference Information | |
| Committee | SeMI / IPSJ-MBL / IPSJ-UBI |
|---|---|
| Conference Date | 2020/3/2(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya University (IB Building) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Susumu Ishihara(Shizuoka Univ.) |
| Vice Chair | Kazuya Monden(Hitachi) / Koji Yamamoto(Kyoto Univ.) |
| Secretary | Kazuya Monden(Kyoto Univ.) / Koji Yamamoto(NTT DOCOMO) / (Hitachi) |
| Assistant | Akira Uchiyama(Osaka Univ.) / Kenji Kanai(Waseda Univ.) / Masafumi Hashimoto(Osaka Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Sensor Network and Mobile Intelligence / Special Interest Group on Mobile Computing and Pervasive Systems / Special Interest Group on Ubiquitous Computing System |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Design and Evaluation of a Wi-Fi Backscatter Sensor for Activity Recognition |
| Sub Title (in English) | |
| Keyword(1) | |
| Keyword(2) | |
| Keyword(3) | |
| Keyword(4) | |
| 1st Author's Name | Toru Maeda |
| 1st Author's Affiliation | Osaka University(Osaka Univ.) |
| 2nd Author's Name | Akira Uchiyama |
| 2nd Author's Affiliation | Osaka University/JST PRESTO(Osaka Univ./JST PRESTO) |
| 3rd Author's Name | Teruo Higashino |
| 3rd Author's Affiliation | Osaka University(Osaka Univ.) |
| Date | 2020-03-03 |
| Paper # | SeMI2019-134 |
| Volume (vol) | vol.119 |
| Number (no) | SeMI-436 |
| Page | pp.pp.185-190(SeMI), |
| #Pages | 6 |
| Date of Issue | 2020-02-24 (SeMI) |