ヘテロコア光ファイバを织り込んだスマート织物の特性検証

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Soka University

電子情報通信学会ソサイエティ大会2017 創価大学理工学部情報システム工学科　助教　小山勇也

創価大学理工学部情報システム工学科助教小山勇也
共生創造理工学科西山道子
共生創造理工学科渡辺一弘
ヘテロコア光ファイバを織り込んだ
スマート織物の特性検証
電子情報通信学会ソサイエティ大会2017
9月13日

監視されているという意識を人に与えず、
いかに身体動作や生体情報をモニタリングするか
研究背景
スマートセンシング技術
日常生活内での健康管理
身の回りに偏在する物自体が人間をセンシング
呼吸
脈拍
動作
着用物自体にセンシング機能を持たせる

M. Rothmaier et al., "Photonic textiles for
pulse oximetry," Opt. Express 16, 12973-
12986 (2008).
J. P. Carmo et al., "Application of Fiber
Bragg Gratings to Wearable Garments,"
Sensors Journal, IEEE , vol.12, no.1,
pp.261,266, Jan. 2012
光ファイバ
利点：柔軟?軽量?耐電磁誘導
POF : 脈拍検知
→人体を透過した光を
伝送路に入射
従来研究
光ファイバを用いたスマートセンシング
FBG: 呼吸検知
→センサ部分に対して歪を与え
るためのポリマーを統合

ヘテロコア部 (1~2mm)
クラッド
125μm
コア 9μmコア 5μm
伝送路伝送路
コア 9μm
特長
?センサ部における緩やかな曲率に対して鋭敏な感度
?外乱に強いシングルモード伝送
?直接的な変位量の検出
?温度補償が不要
?光強度ベースによるリアルタイムな計測が可能
簡便な計測システム
ヘテロコア光ファイバセンサ

違和感なく衣服の素材そのものにセンサを統合
ヘテロコア光ファイバを応用したスマート織物
?ヘテロコア光ファイバを衣料繊維に織り込み
?伸縮?曲げによる特性試験
?脈拍検出のデモンストレーション
目的
ヘテロコア光ファイバ
無意識?無拘束なスマートウェア

スマート織物の作製
手織り機
繊維と共に
織り込む
ヘテロコア部
断面図
縦糸
横糸(直径2mm)
ヘテロコア光ファイバ
編み込み構造
1.5～2.0 (mm)
縦糸(直径2mm)
1.5～2.0 (mm)
縦糸，横糸には市販の毛糸を使用
光ファイバ

スマート織物
ヘテロコア部分
光ファイバ伝送路
拡大図
ヘテロコア光ファイバ
織り込み部分

ヘテロコア部分
スマート織物
LED/PD
(λ=1.31 μm)
光ファイバ
伝送路
AD コンバータ PC
サンプリング周波数:
20 Hz
縦方向横方向
伸縮試験
曲げ試験
縦方向横方向
実験構成図

伸縮試験
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Time [s]
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
Loss[dB]
織り込まれているヘテロコア部への曲げ変化
→方向に対して感度を有する
縦方向の伸縮
0.00 1.00 2.00 3.00 4.00 5.00 6.00
Time [s]
横方向の伸縮

曲げ試験
0
0.5
1
1.5
2
2.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0
LossdB]
Time [s]
縦方向の曲げ
0
0.02
0.04
0.06
0.08
0.1
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Loss[dB]
Time [s]
拡大
縦方向の曲げ横方向の曲げ
ヘテロコア部分
横方向の曲げ
縦方向: 2dB
横方向: < 0.01 dB
感度は曲げる方向に
依存する

脈拍検知のデモンストレーション
ヘテロコア部分
スマート織物を
手首に被せる
脈位置
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0 2 4 6 8 10
Loss[dB]
Time [s]
0.04 dB
脈拍といった微弱な
圧力変化を検出

まとめ
ヘテロコア光ファイバを応用したスマート織物
? ヘテロコア光ファイバを繊維の一部に用いてスマート織物を作
製した
→繊維同士の幅は1.5～2.0 mm
? 織物への曲げや伸縮に対する特性試験
→ 伸縮：0.5 dB、曲げ： 2 dBの感度を有する
→感度は方向に依存する
? 脈拍の検出試験
→0.04dBの振幅で検出可能
ヘテロコア光ファイバによるスマート織物を用いて着用物を作製
→生体情報や身体動作情報をモニタ

謝辞
御清聴ありがとうございました.
本研究はJSPS科研費17K18185の助成を受けたものです．

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ヘテロコア光ファイバを织り込んだスマート织物の特性検証

1. 創価大学理工学部情報システム工学科助教小山勇也共生創造理工学科西山道子共生創造理工学科渡辺一弘ヘテロコア光ファイバを織り込んだスマート織物の特性検証電子情報通信学会ソサイエティ大会2017 9月13日

2. 監視されているという意識を人に与えず、いかに身体動作や生体情報をモニタリングするか研究背景スマートセンシング技術日常生活内での健康管理身の回りに偏在する物自体が人間をセンシング呼吸脈拍動作着用物自体にセンシング機能を持たせる

3. M. Rothmaier et al., "Photonic textiles for pulse oximetry," Opt. Express 16, 12973- 12986 (2008). J. P. Carmo et al., "Application of Fiber Bragg Gratings to Wearable Garments," Sensors Journal, IEEE , vol.12, no.1, pp.261,266, Jan. 2012 光ファイバ利点：柔軟?軽量?耐電磁誘導 POF : 脈拍検知 →人体を透過した光を伝送路に入射従来研究光ファイバを用いたスマートセンシング FBG: 呼吸検知 →センサ部分に対して歪を与えるためのポリマーを統合

4. ヘテロコア部 (1~2mm) クラッド 125μm コア 9μmコア 5μm 伝送路伝送路コア 9μm 特長 ?センサ部における緩やかな曲率に対して鋭敏な感度 ?外乱に強いシングルモード伝送 ?直接的な変位量の検出 ?温度補償が不要 ?光強度ベースによるリアルタイムな計測が可能簡便な計測システムヘテロコア光ファイバセンサ

5. 違和感なく衣服の素材そのものにセンサを統合ヘテロコア光ファイバを応用したスマート織物 ?ヘテロコア光ファイバを衣料繊維に織り込み ?伸縮?曲げによる特性試験 ?脈拍検出のデモンストレーション目的ヘテロコア光ファイバ無意識?無拘束なスマートウェア

6. スマート織物の作製手織り機繊維と共に織り込むヘテロコア部断面図縦糸横糸(直径2mm) ヘテロコア光ファイバ編み込み構造 1.5～2.0 (mm) 縦糸(直径2mm) 1.5～2.0 (mm) 縦糸，横糸には市販の毛糸を使用光ファイバ

7. スマート織物ヘテロコア部分光ファイバ伝送路拡大図ヘテロコア光ファイバ織り込み部分

8. ヘテロコア部分スマート織物 LED/PD (λ=1.31 μm) 光ファイバ伝送路 AD コンバータ PC サンプリング周波数: 20 Hz 縦方向横方向伸縮試験曲げ試験縦方向横方向実験構成図

9. 伸縮試験 0.00 1.00 2.00 3.00 4.00 5.00 6.00 Time [s] -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 Loss[dB] 織り込まれているヘテロコア部への曲げ変化 →方向に対して感度を有する縦方向の伸縮 0.00 1.00 2.00 3.00 4.00 5.00 6.00 Time [s] 横方向の伸縮

10. 曲げ試験 0 0.5 1 1.5 2 2.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 LossdB] Time [s] 縦方向の曲げ 0 0.02 0.04 0.06 0.08 0.1 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Loss[dB] Time [s] 拡大縦方向の曲げ横方向の曲げヘテロコア部分横方向の曲げ縦方向: 2dB 横方向: < 0.01 dB 感度は曲げる方向に依存する

11. 脈拍検知のデモンストレーションヘテロコア部分スマート織物を手首に被せる脈位置 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0 2 4 6 8 10 Loss[dB] Time [s] 0.04 dB 脈拍といった微弱な圧力変化を検出

12. まとめヘテロコア光ファイバを応用したスマート織物 ? ヘテロコア光ファイバを繊維の一部に用いてスマート織物を作製した →繊維同士の幅は1.5～2.0 mm ? 織物への曲げや伸縮に対する特性試験 → 伸縮：0.5 dB、曲げ： 2 dBの感度を有する →感度は方向に依存する ? 脈拍の検出試験 →0.04dBの振幅で検出可能ヘテロコア光ファイバによるスマート織物を用いて着用物を作製 →生体情報や身体動作情報をモニタ

13. 謝辞御清聴ありがとうございました. 本研究はJSPS科研費17K18185の助成を受けたものです．

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ヘテロコア光ファイバを织り込んだスマート织物の特性検証

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ヘテロコア光ファイバを织り込んだスマート织物の特性検証