論文 - 仰木　裕嗣

手首で計測した加速度による投球スピードの推定

'斎藤健治, 仰木裕嗣, 井上伸一, 市川浩, 山岸正克, 宮地力, 高井省三'

体育学研究 （日本体育学会）  47 （ 1 ） 41-51 - 51 2002年01月

研究論文（学術雑誌）, 共著, 査読有り,  ISSN  0484-6710

　概要を見る

In order to collect information concerned with the development of a measuring device for baseball pitching, pattern of motion and ball speed during a baseball pitch were estimated from acceleration measured at the wrist through multivariate analysis. The subjects were 26 college baseball players (eight pitchers, five catchers, nine infielders and four outfielders). Three accelerometers were attached to the wrist of each subject. The subjects then pitched fifteen times, with intensities ranging from weak to full, to a defensive net set up six meters distant. The accelerometers were arranged perpendicularly to each other on three axes : distal-proximal direction, ulnar-radial direction, and dorsalpalmar direction. The ball speed was measured with a laser device set between the subjects and the defensive net. The time of ball-release was detected using electrical conductive tape placed on the tip of each subjects index and middle fingers and the ball. After extracting the 18 parameters relating to amplitude and time that characterize the acceleration wave, the 26 subjects were classified into three groups-A, B and C-by cluster analysis, and ball speed was estimated in each group by multiple regression analysis. The estimation errors were 2.3 ± 1.8% in group A, 2.5 ± 2.3% in group B, 2.4 ± 2.4% in group C, and 3.4 ± 2.8% for all data. For estimating the ball speed, acceleration in the distal-proximal direction was more effective than that in the other two directions.

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第9回世界水泳選手権大会福岡2001における競泳のレース分析

生田泰志、宮下充正、野村照夫、奥野景介、仰木裕嗣、若吉浩二、高木英 樹、荻田太

トレーニング科学研究 13 （ ',3' ） 167-172 2002年

研究論文（学術雑誌）, 共著

'Mathgres--A MathLink Connection between PostgreSQL and Mathematica for Experimental Data Analysis and Storage, '

おおぎゆうじ, きむらひろし, みやじちから

'Symbolic Computation: New Horizeons, Proceedings of the fourth International Mathematica Symposium' （Tokyo Denki University Press）     393-400 2001年06月

研究論文（学術雑誌）, 共著

　概要を見る

'In the field of experiment or data analysis, we need both a good data storage tool and a computational tool. A combination of databases and Mathematica will be an ideal solution for such situation. In order to satisfy this need, we built a mathlink program, 'Mathgres' which connects PostgreSQL with Mathematica. 'Mathgres' makes us store Mathematica data into PostgreSQL and retrieve it to Mathematica. As the result of this environment, we found; (1) Instead of scattering the data files in saving, database can integrate the data and makes the process of data analysis smooth. (2) We can easily maintain both the experimental data and its related information together. This is very useful tool in the sports biomechanics field.'

RDBMSを用いた競泳レース分析データベースの構築およびネットワークによるデータ提供

仰木裕嗣

平成9年度〜12年度　科学研究費補助金基盤研究A-2研究成果報告（課題番号09358002）　代表研究者　武藤芳照    5-20 2001年03月

単著

投球スピード漸増および 球種 の違いによる上肢筋活動の変化

'斎藤健治, 仰木裕嗣, 市川浩, 井上伸一, 松尾知之, 足立和隆, 宮地力, 高井省三'

筑波大学体育科学系紀要 （筑波大学体育科学系）  24   79-88 - 88 2001年

研究論文（大学，研究機関等紀要）, 共著,  ISSN  0386-7129

手首で計測した加速度と水中映像によるクロール泳のストローク技術の観察

仰木裕嗣，市川浩，本間正信，宮地力

水泳水中運動科学 3   35-41 2000年09月

共著

Analysis of stroke technique using acceleration sensor IC in freestyle swimming

Ohgi, Y, Yasumura, M, Ichikawa, H, Miyaji, C

The Engineering of SPORT （'A.J. Subic and S.J. Haake Eds., BlackwellPublishing'）     503-511 2000年07月

研究論文（学術雑誌）, 共著

投球時に手首で測定した加速度波形のパターン分類

斎藤健治，仰木裕嗣，市川 浩，山岸正克，宮地 力，高井省三

いばらき健康・スポーツ科学 （体育学会茨城支部）  19   13-26 2000年

研究論文（学術雑誌）, 共著, 査読有り

投球時に手首で測定した加速度波形のパターン分類

斎藤健治，仰木裕嗣，市川浩，山岸正克，宮地力，高井省三

いばらき健康・スポーツ科学 19   13-26 2000年

共著

速球とカーブの投球におけるボールリリース前後の前腕運動の比較

斎藤健治，仰木裕嗣，市川浩，足立和隆，宮地力，高井省三

筑波大学体育科学系紀要 23   63-71 2000年

共著

速球とカーブの投球におけるボールリリー ス前後の前腕運動の比較

斎藤健治，仰木裕嗣，市川 浩，足立和隆，宮地 力，高井省三

筑波大学体育科学系紀要 （筑波大学体育科学系）  23   63-71 2000年

研究論文（大学，研究機関等紀要）, 共著

加速度センサを用いたスポーツの分析

仰木裕嗣

コンピュータサイエンス誌 bit 31 （ 12 ） 51 1999年12月

単著

加速度センサを用いたスポーツの分析

仰木裕嗣

'コンピュータサイエンス誌 bit, ' （共立出版）  31 （ 12 ） 51-56 1999年12月

研究論文（学術雑誌）, 単著

Characteristics of the forearm acceleration in swimming

おおぎゆうじ, いちかわひろし, みやじちから

Biomechanics and Medicine in SwimmingVIII （'Keskinen, K. L., Komi, P., V., Hollander A., P., Eds, Dpt. Of Biology and Physical Activity, Univ. of Jyvaskyla'）     77-82 1999年

研究論文（学術雑誌）, 共著, 査読有り

　概要を見る

'We observed swimmers' right forearm acceleration in swimming using the tri-axes strain gaged accelerometer. The results of the experiment shows that there were some characteristics about each stroke style and subjectユs own stroke pattern in accelerations. It was suggested that there were possibilities to analyze each phase of the swimming stroke from the acceleration signal directly. We normalized each stroke cycle duration into [0, 1]. Acceleration values were extracted from X, Y, Z axes at the same interval with respect to normalized time. We discriminated whether a certain one cycle acceleration pattern had belonged to which stroke style, such as freestyle or breast stroke. In this study, we applied the Maharanobisユs generalized distance to our study which is a one of the method of the discriminant analysis. We discriminated a certain acceleration series in case of N = 10, 20, 25. The results of this discrimination indicated that there were possibility that we could discriminate a certain one stroke cycle belongs to which stroke styles in high accuracy using acceleration signals(Error Discriminant Ratio = 1.96[%]).'

Analysis stroke of the freestyle swimming using accelerometer

いちかわひろし, おおぎゆうじ, みやじちから

Biomechanics and Medicine in SwimmingVIII （'Keskinen, K. L., Komi, P., V., Hollander A., P., Eds, Dpt. Of Biology and Physical Activity, Univ. of Jyvaskyla'）     159-164 1999年

研究論文（学術雑誌）, 共著, 査読有り

A Study of Methodology about Analysing Human Movement Patterns and Performance using Acceleration Time Series

おおぎゆうじ, もくのたかなお, やまぎしまさかつ, みやじちから

The Engineering of SPORT （'S. J. Haake Ed., /Blackwell Publishing'）     465-472 1998年07月

研究論文（学術雑誌）, 共著

　概要を見る

'In this study, we investigated the acceleration in punch motion of some martial arts, such as Karate, Boxing, Syorinji Kenpo and non athlete. We predicted the peak impact force of straight punch motion and discriminated the patterns of these martial arts using the time series of their wrist acceleration.In sports trainig, players need feedback of their performance or form in their movement as quickly as possible. Up to now, they usually depended it on motion analysis method by the cine or video films. But it is not practical at the training situation, because it takes a lot of time to get the results of the analysis. On the other hand, the acceleration signal from the playersユ movement is suitable for real time analysis. In martial arts, the impact force of the punch motion is one of the index of playersユ performance. We predicted the impact force by the acceleration time series with high accuracy (r = 0.923 to 0.966 in case of N = 20 about athletes). This method enables us to predict players's performance by only acceleration time series. And each martial arts school, they have a traditional form of their punch motion. We also discriminated these patterns from the acceleration time series.'

自転車の急制動に関する研究

仰木裕嗣, 宮地力, 小林一敏

スポーツ産業学研究 （スポーツ産業学会）  5 （ 2 ） 35－44 - 44 1995年

研究論文（学術雑誌）, 共著, 査読有り,  ISSN  1343-0688

　概要を見る

Hard braking of a bicycle often causes ruler over the handlebar . To Analyse this phenomenon, we assumed that bicycle-rider system consist of rigid body model which have one mass and one arm. Input of this system was braking force function which acts as frictional force between tire and road surface . We analyzed this model by computer simulation method. Results of computer simulation well showed experiment tal data. Simulation showed, if rider braked very hard with him over the handlebar, he can avoid danger, as quickly as he could release brake levers, or as far as he couldshift his seated position backward.

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