著者
土谷 圭央 日下 聖 田中 孝之 松尾 祥和 小田 まこと 笹木 工 神島 保 山中 正紀
出版者
一般社団法人 日本機械学会
雑誌
日本機械学会論文集 (ISSN:21879761)
巻号頁・発行日
vol.82, no.843, pp.16-00072-16-00072, 2016 (Released:2016-11-25)
参考文献数
22
被引用文献数
6

Anteflexion of the spine is essential for many physical activities of daily living. However, this motion places the lumbar disks because it generats heavy load due to changes in the shape of the lumbar spine and can lead to low back pain. In older to reduce low back pain, here we proposed a wearable sensor system configuration that can estimate lumbosacral alignment and lumbar load by measuring the shape of the lumbar skin when the lumbosacral alignment changes. The shape of the lumbar skin and posture angle are measured by using curvature sensors and accelerometers. In addition, the system must be constructed in consideration of the physique, in order to absorb in a variety of human. We proposed this system by measuring the body parameters of anteflexion and studied the change in dimensions of the lumbar spine from changes in posture. By extracting the dimensions of the lumbosacral spine in X-ray images, the attitude angle, body surface area and the dimensions of the lumbosacral spine have relevance. The lumbosacral dimensions calibration method was developed by using that relation. Lumbosacral alignment estimation considering the difference in physiques is developed, and lumbosacral spine alignment was to improve the estimation accuracy. The proposed method could improve accuracy lumbosacral alignment estimation.
著者
田中 孝之 本多 幸太郎 山藤 和男
出版者
一般社団法人日本機械学会
雑誌
ロボティクス・メカトロニクス講演会講演概要集
巻号頁・発行日
vol.2000, 2000

犬は訓練により, 空中に投げられたフリスビーや物体の落下する近くまで駆けて行って口で受けとめることができる。本研究はそのような犬の動作をロボットで実現するため, 多関節の二足をもつロボットを開発した。空中に放り投げられたこのロボットが空中でオイラー角を検出し, 足を常に地面に向けて軟着陸するようにゴム人工筋を制御することにより, ロボット犬の足からの軟着地実験に成功した。
著者
浦野 貴裕 金子 俊一 高氏 秀則 田中 孝之
出版者
一般社団法人 画像電子学会
雑誌
画像電子学会誌 (ISSN:02859831)
巻号頁・発行日
vol.36, no.4, pp.417-425, 2007 (Released:2011-08-25)
参考文献数
21
被引用文献数
1

方向符号差分ヒストグラム(OCDH)に基づき回転不変かつ計算コストの低いロバストな画像照合法を提案する.画素近傍の明度変化の勾配から得られる方向符号は,ハイライトや陰影などの明度変動対して強いロバスト性を有する.画像上の2点から得られる方向符号の差分は,回転不変特徴を持ち,本手法では,そのヒストグラム(OCDH)を照合に利用する.高速な回転不変照合実現のため,照合の候補位置をOCDHにより推定し,推定された候補位置に対して画像間の回転角度推定,ならびに方向符号を用いた確認処理を行う.
著者
瀧澤 一騎 田中 孝之 吉成 哲 奈良 博之 柴田 啓介 山中 正紀 鈴木 善人
出版者
日本生理人類学会
雑誌
日本生理人類学会誌 (ISSN:13423215)
巻号頁・発行日
vol.18, no.2, pp.87-92, 2013-05-25 (Released:2017-07-28)

We examined physical fitness adaptation after six weeks of snow shovelling using different types of shovels. Thirty-three subjects participated in this study and were divided two groups: normal shovel group and less-workload shovel (UD-shovel) group. Grip strength, vertical jump, 10 m obstacle walking, chair rising test, lactate threshold and body mass were measured before and after six weeks of snow shovelling. All measurements showed no significant differences between the groups. The chair rising test and ten meter obstacle walking were significantly at main effects. These values were higher in the after period than in the before period. But there were no significant differences at main effects in grip strength, vertical jump, lactate threshold and body mass. These results suggest that six weeks of snow shovelling may not affect upper body strength and aerobic capacity, but may affect lower body and muscle of trunk strength, power, agility, balance and coordination. These effects were not different if using normal shovels or UD-shovels.
著者
日下 聖 田中 孝之 梶原 秀一
出版者
一般社団法人 日本ロボット学会
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.32, no.2, pp.198-206, 2014 (Released:2014-04-15)
参考文献数
21
被引用文献数
3

This paper describes a method of skill assist efficiency control by using semi-active assist mechanisms based on phase difference limitation method. The skill assist in this study means the motion correction effect in periodical motions. The semi-active assist mechanisms can make the assist force with the phase difference, because the mechanism uses elastic materials as the source of the assist force. This force is controlled by adjusting the fixed point of the elastic materials by using the connected actuator as a series-elastic actuator. We confirmed the motion correction effect of our skill assist based on the phase difference control in previous study. Our proposed method in this study can control the skill assist efficiency to arbitrary value by limitation of the phase difference. Moreover, we confirmed that the proposed method can control its effect through experiments with several value of the efficiency. As a result of this study, we confirmed the fundamental ability of our developed method to control the motion correction ratio depending on types of task or personal differences in periodical motions.