JP6477644B2 - 歩行訓練装置およびその制御方法 - Google Patents
歩行訓練装置およびその制御方法 Download PDFInfo
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- JP6477644B2 JP6477644B2 JP2016190292A JP2016190292A JP6477644B2 JP 6477644 B2 JP6477644 B2 JP 6477644B2 JP 2016190292 A JP2016190292 A JP 2016190292A JP 2016190292 A JP2016190292 A JP 2016190292A JP 6477644 B2 JP6477644 B2 JP 6477644B2
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- winding mechanism
- wire winding
- driving force
- leg
- wire
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- 238000000034 method Methods 0.000 title claims description 14
- 230000007246 mechanism Effects 0.000 claims description 172
- 238000004804 winding Methods 0.000 claims description 159
- 230000005484 gravity Effects 0.000 claims description 16
- 230000005021 gait Effects 0.000 claims description 6
- 210000002414 leg Anatomy 0.000 description 113
- 210000000689 upper leg Anatomy 0.000 description 10
- 210000000629 knee joint Anatomy 0.000 description 7
- 210000000544 articulatio talocruralis Anatomy 0.000 description 4
- 210000002683 foot Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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Description
この一態様において、前記脚部に直接的又は前記歩行補助装置を介して接続されたワイヤーを巻き取ることで、前記脚部のワイヤーを上方かつ後方に引張する第2ワイヤー巻取り機構を更に備え、前記第2ワイヤー巻取り機構が、前記訓練者の歩行動作において前記脚部が遊脚状態となる遊脚期間ではモータを回転させて前記ワイヤーを巻取り、前記訓練者の歩行動作において前記脚部が立脚状態となる立脚期間ではモータを前記遊脚期間と逆に回転させて前記ワイヤーを繰り出し、前記制御手段は、前記歩行補助装置の重力を低減するように予め定められた第3駆動力を基準として、前記第2ワイヤー巻取り機構のモータの駆動力を制御しており、前記遊脚期間において、前記第2ワイヤー巻取り機構の機械摩擦によって生じる前記第2ワイヤー巻取り機構の引張力の損失を低減する第4駆動力を、前記第3駆動力から減算した駆動力を、前記第2ワイヤー巻取り機構のモータに発生させる制御、及び、前記立脚期間において、前記第2ワイヤー巻取り機構の機械摩擦によって生じる前記第2ワイヤー巻取り機構の引張力の損失を低減する第4駆動力を前記第3駆動力に対して加算した駆動力を、前記第2ワイヤー巻取り機構のモータに発生させる制御、のうちの少なくとも一方の制御を行ってもよい。
上記目的を達成するための本発明の一態様は、訓練者の脚部に装着され、該訓練者の歩行動作を補助する歩行補助装置と、前記脚部に直接的又は前記歩行補助装置を介して接続されたワイヤーを巻き取ることで、前記脚部のワイヤーを上方かつ前方に引張する第1ワイヤー巻取り機構と、前記歩行補助装置の重力を低減するように予め定められた第1駆動力を基準として、前記第1ワイヤー巻取り機構のモータの駆動力を制御する制御手段と、を備え、前記第1ワイヤー巻取り機構が、前記訓練者の歩行動作において前記脚部が遊脚状態となる遊脚期間ではモータを回転させて前記ワイヤーを巻取り、前記訓練者の歩行動作において前記脚部が立脚状態となる立脚期間では前記モータを前記遊脚期間と逆に回転させて前記ワイヤーを繰り出す、歩行訓練装置の制御方法であって、前記遊脚期間において、前記第1ワイヤー巻取り機構の機械摩擦によって生じる前記第1ワイヤー巻取り機構の引張力の損失を低減する第2駆動力を前記第1駆動力に対して加算した駆動力を、前記第1ワイヤー巻取り機構のモータに発生させる制御、および、前記立脚期間において、前記第1ワイヤー巻取り機構の機械摩擦によって生じる前記第1ワイヤー巻取り機構の引張力の損失を低減する第2駆動力を前記第1駆動力から減算した駆動力を、前記第1ワイヤー巻取り機構のモータに発生させる制御、のうちの少なくも一方の制御を行う、ことを特徴とする歩行訓練装置の制御方法であってもよい。
以下、図面を参照して本発明の実施形態について説明する。
図1は、本発明の実施形態1に係る歩行訓練装置の概略的な構成を示す斜視図である。本実施形態1に係る歩行訓練装置1は、例えば、脳卒中片麻痺患者などの訓練者の歩行訓練を行うための装置である。歩行訓練装置1は、訓練者の脚部に装着された歩行補助装置2と、訓練者の歩行訓練を行う訓練装置3と、を備えている。
例えば、機構制御部352は、下記式に基づいて、機械摩擦力FTを算出する。そして、機構制御部352は、算出した機械摩擦力FTに対して所定係数を乗算することで、機械摩擦力FTに対応する第2駆動力f2を算出する。なお、機械摩擦力FTに対応する第2駆動力f2とは、機械摩擦力FTに等しい第2駆動力f2だけなく、第1ワイヤー巻取り機構33の引張力の損失を低減するような、それより小さい或いは大きい第2駆動力f2を含むものとする。
FT=Tdynamic+KfθV
動作判定部351は、歩行補助装置が装着された脚部が遊脚期間又は立脚期間のいずれであるかを判定する(ステップS101)。
図5は、本発明の実施形態2に係る歩行訓練装置の概略的な構成を示す図である。本実施形態2に係る歩行訓練装置は、フレーム本体32の左右フレーム323には、ワイヤー39を介して歩行補助装置2を上方かつ後方に引張する第2ワイヤー巻取り機構38を更に備える構成であってもよい。第1及び第2ワイヤー巻取り機構33、38による引張力の鉛直上方成分の合力が歩行補助装置2の重さを支える。そして、第1及び第2ワイヤー巻取り機構33、38による引張力の水平成分の合力により、脚部の振出しを補助する。
動作判定部351は、歩行補助装置が装着された脚部が遊脚期間又は立脚期間のいずれであるかを判定する(ステップS201)。
Claims (3)
- 訓練者の脚部に装着され、該訓練者の歩行動作を補助する歩行補助装置と、
前記脚部に直接的又は前記歩行補助装置を介して接続されたワイヤーを巻き取ることで、前記脚部のワイヤーを上方かつ前方に引張する第1ワイヤー巻取り機構と、
前記歩行補助装置の重力を低減するように予め定められた第1駆動力を基準として、前記第1ワイヤー巻取り機構のモータの駆動力を制御する制御手段と、を備え、
前記第1ワイヤー巻取り機構が、
前記訓練者の歩行動作において前記脚部が遊脚状態となる遊脚期間ではモータを回転させて前記ワイヤーを巻取り、前記訓練者の歩行動作において前記脚部が立脚状態となる立脚期間では前記モータを前記遊脚期間と逆に回転させて前記ワイヤーを繰り出す、
歩行訓練装置であって、
前記制御手段は、
前記遊脚期間において、前記第1ワイヤー巻取り機構の機械摩擦によって生じる前記第1ワイヤー巻取り機構の引張力の損失を低減する第2駆動力を前記第1駆動力に対して加算した駆動力を、前記第1ワイヤー巻取り機構のモータに発生させる制御、
および、
前記立脚期間において、前記第1ワイヤー巻取り機構の機械摩擦によって生じる前記第1ワイヤー巻取り機構の引張力の損失を低減する第2駆動力を前記第1駆動力から減算した駆動力を、前記第1ワイヤー巻取り機構のモータに発生させる制御、
のうちの少なくも一方の制御を行う、
ことを特徴とする歩行訓練装置。 - 請求項1記載の歩行訓練装置であって、
前記脚部に直接的又は前記歩行補助装置を介して接続されたワイヤーを巻き取ることで、前記脚部のワイヤーを上方かつ後方に引張する第2ワイヤー巻取り機構を更に備え、
前記第2ワイヤー巻取り機構が、
前記訓練者の歩行動作において前記脚部が遊脚状態となる遊脚期間ではモータを回転させて前記ワイヤーを巻取り、前記訓練者の歩行動作において前記脚部が立脚状態となる立脚期間ではモータを前記遊脚期間と逆に回転させて前記ワイヤーを繰り出し、
前記制御手段は、
前記歩行補助装置の重力を低減するように予め定められた第3駆動力を基準として、前記第2ワイヤー巻取り機構のモータの駆動力を制御しており、
前記遊脚期間において、前記第2ワイヤー巻取り機構の機械摩擦によって生じる前記第2ワイヤー巻取り機構の引張力の損失を低減する第4駆動力を、前記第3駆動力から減算した駆動力を、前記第2ワイヤー巻取り機構のモータに発生させる制御、
及び、
前記立脚期間において、前記第2ワイヤー巻取り機構の機械摩擦によって生じる前記第2ワイヤー巻取り機構の引張力の損失を低減する第4駆動力を前記第3駆動力に対して加算した駆動力を、前記第2ワイヤー巻取り機構のモータに発生させる制御、
のうちの少なくとも一方の制御を行う、
ことを特徴とする歩行訓練装置。 - 訓練者の脚部に装着され、該訓練者の歩行動作を補助する歩行補助装置と、
前記脚部に直接的又は前記歩行補助装置を介して接続されたワイヤーを巻き取ることで、前記脚部のワイヤーを上方かつ前方に引張する第1ワイヤー巻取り機構と、
前記歩行補助装置の重力を低減するように予め定められた第1駆動力を基準として、前記第1ワイヤー巻取り機構のモータの駆動力を制御する制御手段と、を備え、
前記第1ワイヤー巻取り機構が、
前記訓練者の歩行動作において前記脚部が遊脚状態となる遊脚期間ではモータを回転させて前記ワイヤーを巻取り、前記訓練者の歩行動作において前記脚部が立脚状態となる立脚期間では前記モータを前記遊脚期間と逆に回転させて前記ワイヤーを繰り出す、
歩行訓練装置の制御方法であって、
前記制御手段が、
前記遊脚期間において、前記第1ワイヤー巻取り機構の機械摩擦によって生じる前記第1ワイヤー巻取り機構の引張力の損失を低減する第2駆動力を前記第1駆動力に対して加算した駆動力を、前記第1ワイヤー巻取り機構のモータに発生させる制御、
および、
前記立脚期間において、前記第1ワイヤー巻取り機構の機械摩擦によって生じる前記第1ワイヤー巻取り機構の引張力の損失を低減する第2駆動力を前記第1駆動力から減算した駆動力を、前記第1ワイヤー巻取り機構のモータに発生させる制御、
のうちの少なくも一方の制御を行う、
ことを特徴とする歩行訓練装置の制御方法。
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