JP2018086150A - 圧迫深度算出装置 - Google Patents
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Abstract
【解決手段】対象物における圧迫動作による圧迫部分の動きの加速度を検出する加速度センサ13と、対象物における圧迫動作による圧迫部分に対する圧迫の大きさに応じた情報であるコイル間距離ADを出力する磁気センサ19と、加速度センサ13から取得した加速度情報の二階積分に基づいて算出した圧迫深度Daと、磁気センサ19から取得したコイル間距離ADと、の相関関係Rを求める第一計算部233Aと、相関関係Rが算出された後の圧迫動作の際、磁気センサ19から取得されるコイル間距離ADと相関関係Rとに基づいて、相関関係Rが算出された後の圧迫動作の圧迫深度Drを算出する、第二計算部233Bと、を備える。
【選択図】図2
Description
圧迫された対象物の凹みの大きさである圧迫深度を算出する圧迫深度算出装置であって、
前記対象物における圧迫動作による圧迫部分の動きの加速度を検出する第一センサと、
前記対象物における圧迫動作による圧迫部分に対する圧迫の大きさに応じた情報を出力する第二センサと、
前記第一センサから取得した加速度情報の二階積分に基づいて算出した圧迫深度と、前記第二センサから取得した前記圧迫の大きさに応じた情報と、の相関関係を求める第一計算部と、
前記相関関係が算出された後の圧迫動作の際、前記第二センサから取得される圧迫動作の圧迫の大きさに応じた情報と前記相関関係とに基づいて、前記相関関係が算出された後の圧迫動作の圧迫深度を算出する、第二計算部と、
を備える。
このように、上記構成によれば、圧迫動作毎に圧迫変位がバラつく場合であっても、圧迫深度を精度良く算出することができる。
計算部233では、第一計算部233Aが、加速度センサ13から取得した加速度を二階積分して圧迫深度Daを算出する。そして、第一計算部233Aは、この加速度センサ13から取得した加速度情報の二階積分に基づいて算出した圧迫深度Daと、磁気センサ19から取得した受信コイル11と発信コイル12との距離であるコイル間距離ADとの相関関係Rを求める。このコイル間距離ADは、圧迫の大きさに応じた情報の一例である。
計算部233では、第三計算部233Cが、図8に示すように、第一計算部233Aにおいて求めた複数(本例では16回分)の相関関係Rを用い、複数の相関関係Rの平均である平均相関関係Raveを求める。加速度センサ13からの加速度を二階積分した値はノイズが含まれることがあるが、複数の相関関係Rの平均である平均相関関係Raveを求めることで、ノイズの影響を低減させることができる。
計算部233では、第二計算部233Bが、図9に示すように、平均相関関係Raveが算出された後の圧迫動作の際、磁気センサ19から取得される受信コイル11と発信コイル12との距離であるコイル間距離ADと平均相関関係Raveとに基づいて、平均相関関係Raveが算出された後の圧迫動作時の圧迫深度Drを算出する。
Claims (3)
- 圧迫された対象物の凹みの大きさである圧迫深度を算出する圧迫深度算出装置であって、
前記対象物における圧迫動作による圧迫部分の動きの加速度を検出する第一センサと、
前記対象物における圧迫動作による圧迫部分に対する圧迫の大きさに応じた情報を出力する第二センサと、
前記第一センサから取得した加速度情報の二階積分に基づいて算出した圧迫深度と、前記第二センサから取得した前記圧迫の大きさに応じた情報と、の相関関係を求める第一計算部と、
前記相関関係が算出された後の圧迫動作の際、前記第二センサから取得される圧迫動作の圧迫の大きさに応じた情報と前記相関関係とに基づいて、前記相関関係が算出された後の圧迫動作の圧迫深度を算出する、第二計算部と、
を備える、
圧迫深度算出装置。 - 前記第一計算部で求められた複数の前記相関関係の平均である平均相関関係を求める第三計算部を備え、
前記第二計算部は、前記平均相関関係が算出された後の圧迫動作の際、前記第二センサから取得される圧迫動作の圧迫の大きさに応じた情報と前記平均相関関係とに基づいて、前記平均相関関係が算出された後の圧迫動作の圧迫深度を算出する、
請求項1に記載の圧迫深度算出装置。 - 前記第二センサは、磁気センサであり、
前記磁気センサは、
前記対象物における圧迫部分に対して固定される固定部と、
前記固定部と対向する位置に、前記圧迫の方向に移動可能に設けられる可動部と、
磁界を発生させる磁界発生部と、
磁界を検知する磁界検知部と、
を備え、
前記固定部及び前記可動部には、一方に前記磁界発生部が設けられ、他方に前記磁界検知部が設けられ、
前記第一センサは、前記固定部に配置され、
前記磁界発生部と、前記磁界検知部と、前記固定部に配置された前記第一センサとが、前記圧迫の方向に並んで配置されている、
請求項1または請求項2に記載の圧迫深度算出装置。
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JP2016231281A JP6847643B2 (ja) | 2016-11-29 | 2016-11-29 | 圧迫深度算出装置 |
PCT/JP2017/042390 WO2018101202A1 (en) | 2016-11-29 | 2017-11-27 | Compression depth calculating device |
US16/464,497 US20190314242A1 (en) | 2016-11-29 | 2017-11-27 | Compression depth calculating device |
EP17818642.5A EP3547903B1 (en) | 2016-11-29 | 2017-11-27 | Compression depth calculating device |
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US7220235B2 (en) * | 2003-06-27 | 2007-05-22 | Zoll Medical Corporation | Method and apparatus for enhancement of chest compressions during CPR |
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JP2008242424A (ja) * | 2006-12-15 | 2008-10-09 | Laerdal Medical As | 信号処理装置 |
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US20190314242A1 (en) | 2019-10-17 |
EP3547903B1 (en) | 2021-10-06 |
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