JP2020531063A - 自動車乗員のバイタルサインの非接触の検知および監視システム - Google Patents
自動車乗員のバイタルサインの非接触の検知および監視システム Download PDFInfo
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Abstract
Description
この出願は、2017年8月2日に出願された車両乗客のバイタルサインの非接触検知および監視システムと題する共有に係わる米国仮特許出願第62/540,083に関するものであり、かつその優先権を主張し、当該米国仮出願の開示は、その全体において参照により本明細書に組込まれる。
ネットワーク50を介して、ホームサーバー110は、他の多くのサーバー、デバイスなど、例えば、警察、消防署、救急車、政府122、政府機関など、統計機構123、及びクラウド記憶装置などの記憶媒体130などの第1の応答機121に関連づけられたサーバーにリンクされる。
φ=arctan(Q/I)
φ=arctan(Q/I)
b. Ekはビンの中での電力量の値である。
c. kはビンの整数である。Iは高調波次数(図2を参照)を表わす。
d. iは高調波の次数を表わす(図2を参照)。
e. Fbiは基本周波数セグメントSiの境界周波数である。
f. Fc_Lは、調整可能な高域フィルター413b−lの締切周波数であり、
および、最初のセグメント(S I)スタート周波数境界を決定する。
g. Fc_Hは、調整可能な低域フィルター413b−3の締切周波数である。
2. 信号は調整可能な高域フィルター413b−1によってフィルタリングされ、例えば、締切周波数Fc_Lは0.8Hzのデフォルト値での較正後に決定される。
3. 信号は、例えば、20Hzのデフォルト値で較正後に決定された締切周波数Fc_Hによって調整可能な低域フィルター413b−3を使用してフィルタリングされる。
4. 蓄積処置はFk周波数内での各周波数のために行なわれる:
a. 周波数セグメント(副帯)上のFc_LとFc_Hとの間の共有周波数帯で基本周波数Fkおよびその高調波(F2k、F3k---)に対応する。
セグメントiとセグメントi+1の間の境界周波数(Fbi、Fb(i+1))は、例えば、次の式
b. Fixk周波数のまわりのビンのエネルギーを計算する。当該周波数はこれらの周波数のまわりのEixkエネルギーおよび隣接したビン・エネルギーを含んでいる。計算は下記関数による:
c. 隣接したビンの数は関数、あるいはBIN LUTによって定義され得る。この数は心拍数信号のために予期された偏差と関係がある(フィルタリング及び増幅回路406から受信したアナログ信号)例えば、単純な関数は次のとおりでありえる:Bins(k)=1
d. 各セグメントEsi(セグメントSのすべてのビンの和を得る)のビンの総合エネルギーを計算する。
e. ウエイト係数WiXk(R)によって、引き数を超えるPart bで計算されたエネルギーを乗じる。引数(R)は、Part bで計算されたエネルギーEaixkと、セグメントSエネルギーの間の比である:
すなわち、
R=Eaixk/Est
関数は定義された関数(例えば、Wixk(R)=R2))によって計算され得る。あるいは、それは対応するLUTから定義され得る。
f. 考慮に入れられる高調波の次数までのk周波数の乗法を蓄積する。(以上FcHまで)、および、Fk周波数に対して、以下の式AFを適用する:
(Ek−1+Ek+Ek+1)xWk+(E2k−1+E2k+E2k+1)xW2k+(E3k−1+E3k+E3k+1)W3kを蓄積する。
g. Guard bins関数は周波数セグメントのギャップ間隔を決定するために使用することができ、エネルギービンは、0のデフォルト値を考慮に入れられない(Guard binはない)。
5. 蓄積はFk_minからFk_maxの間の各Fk周波数範囲に対してなされる。デフォルト値は48−180HRに対応する0.8Hzから3Hzまでであり得る。
6. 最も可能性があるHRはFk周波数に対応し、蓄積関数AFk(部分4f)の値は、Fk周波数に対して最大である。
HR = [l/mean_peak to peak_difference (in seconds)]*60
Claims (26)
- 車両内の乗員のバイタルサインを決定する方法であって、
乗員にレーダー信号を伝達し、乗員から反射されたレーダー信号を受信する、工程と、
車両の振動データに関して反射されたレーダー信号を分析し、修正済の信号を生成するする、工程:および、
修正済の信号の分析し、乗員のバイタルサインを決定する、工程、を含んでなる方法。 - バイタルサインは、呼吸数、心拍数および心拍変動の1つ以上を含んでいる、請求項1に記載の方法。
- レーダー信号はドップラーレーダーからである、請求項1に記載の方法。
- 反射信号はアナログ形式で得られ、デジタル形式に変換され、修正済の信号が修正済のデジタル信号を含んでいる、請求項1に記載の方法。
- 測定されるべきバイタルサインは乗員の呼吸数であり、乗員から反射されたレーダー信号は、呼吸数の高調波に基づいた信号に帰着する、請求項4に記載の方法。
- 監視されるべきバイタルサインは心拍数を含んでいる、請求項2に記載の方法。
- 請求項6に記載の方法であって、
心拍数がプロセスによって決定され、当該プロセスは、
修正済の信号を得る工程と;
修正済の信号をセグメントに分割する分割工程であって、前記セグメントの各々は周波数に対応する工程、
前記セグメントの高周波に対する複数のピークを分析する工程と、を含み、
前記ピークのおのおのに対して、
高調波の各々にウエイトファクターを適用すること、
ウエイトファクターによって乗じられる高周波からのエネルギーを蓄積すること;
および、
最も高い累積エネルギーをもつピークを決定すること、を含んでなる、
ことを特徴とする方法。 - 最も高い累積エネルギーを持つと決定されたピークが、心拍数に対応する、請求項7に記載の方法。
- 請求項2に記載の方法であって、
心拍変動を決定することは、次のプロセス、すなわち、
修正済の信号を得ること;
修正済の信号中の偽信号を決定すること;
偽信号間の連続するピークの修正済の信号を分析すること;
および、
少なくとも所定の数の連続するピークを持つ修正済の信号の一部を決定すること;
および、
少なくとも所定の数の連続するピークを持つ修正済の信号から心拍変動パラメーターを算出すること、を含んでなる、方法。 - 反射信号を呼吸速度周波数に対する第1の経路に分割し、反射信号の分析前に心拍数周波数に対する第2の経路に分割する工程をさらに含む、請求項1に記載の方法。
- 心拍数基本周波数をフィルタリングすることによって、かつ信号の高調波を分析することにより信号を決定することによって、被験者のために心拍数測定時に被験者による移動の衝撃を減少させる方法。
- 大動脈領域でほぼ位置づけてレーダーを集中させることにより心拍数測定中に被験者による移動の衝撃を減少させる方法。
- 横隔膜領域でほぼ位置づけてレーダーを集中させることにより呼吸数測定中に被験者による移動の衝撃を減少させる方法。
- 大動脈領域はLIとL5の脊椎骨間にある請求項12または13に記載の方法。
- 振動データが慣性計測装置から得られる、請求項1に記載の方法。
- 被験者のバイタルサインを決定するためのシステムであって、前記システムは、
被験者に信号を伝達し、被験者から反射された信号を受信するためのレーダー送受信機と;
プロセッサによって処理するために反射信号を変換された信号に変換するための信号変換器と;
被験者に局所的な振動を検出し、前記局所的な振動を表すデータを提供するための振動検知ユニットと;および、
信号変換器および振動検知ユニットと電子通信するプロセッサであって、a)修正済の信号を生成するために振動データに関して変換された信号を分析し、b)乗員のバイタルサインを決定する、修正済の信号を分析するように、プログラムされてなるプロセッサと、を含んでなるシステム。 - 乗員のバイタルサインを決定するために修正済の信号を分析するようにログラムされるプロセッサが、呼吸数、心拍数および心拍変動の1つ以上を含むバイタルサインを決定する、請求項16に記載のシステム。
- 振動検知ユニットは慣性計測装置(IMU)を含んでいる、請求項16に記載のシステム。
- 信号変換器はA−D変換器(ADC)を含んでいる、請求項16に記載のシステム。
- 反射信号の呼吸数周波数と心拍数周波数の分離のために2つの通過帯域経路を含む、レーダー送受信機及び信号変換器と電子通信する、フィルトレーション及び増幅回路をさらに含む、請求項16に記載のシステム。
- レーダー送受信機、信号変換器、プロセッサおよび振動検知ユニットは、単一のセンサユニットを定義する、請求項16に記載のシステム。
- バイタルサインに基づいた車両の乗員を決定するための方法であって、前記方法は、
車両客室にレーダー信号を伝達し反射信号受信する工程;
修正済の信号を生成するために、車両の振動データに関して反射信号を分析する工程:
および、
車両客室内でのバイタルサインの存在を決定するために修正済の信号を分析する工程;
を含み、
もしバイタルサインが存在すれば、乗員は車両のキャビンで検知される、方法。 - フィルタリングおよび増幅回路における最小の増幅回路の利得レベルを決定する方法であって、前記方法は、
高調波の波形を生成する工程;
前記波形を伝達し、反射された波形を受信する工程;
反射された波形を検知するために、フィルタリング及び増幅回路における利得レベルの修正する工程、を含む方法。 - 車両の客室で行なわれる、請求項23に記載の方法。
- 車両の客室に乗員がいない、請求項24に記載の方法。
- 車両の乗員の数を決定する方法であって、前記方法は、
車両の客室にレーダー信号を伝達し、1人以上の乗員から反射されたレーダー信号を受信する工程;
修正済の信号を生成するために、車両の振動データに関して反射されたレーダー信号を分析する工程:および、
乗員のバイタルサインを決定するために修正済の信号を分析する工程;および、
検知されたバイタルサインの数に基づいて、車両の客室内の乗員の数を決定する工程、を含んでなる方法。
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CN110944878A (zh) | 2020-03-31 |
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JP7093918B2 (ja) | 2022-07-01 |
CN110944878B (zh) | 2024-04-30 |
EP3661815A1 (en) | 2020-06-10 |
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