研究者詳細 - 入江　隆

その他リンク： https://jlc.jst.go.jp/DN/JALC/00249441565?from=CiNii

軟物体の粘弾性特性と手指による硬さ評価との関係

入江隆, 中西秀男, 藤田尚文

電子情報通信学会論文誌A 87 ( 10 ) 1329 - 1338 2004年

厚さの異なる軟物体の硬さ評価

入江隆, 中西秀男, 藤田尚文

日本バーチャルリアリティ学会論文誌 9 ( 1 ) 27 - 34 2004年

記述言語：日本語出版者・発行元：特定非営利活動法人日本バーチャルリアリティ学会

A man applies load on a soft object with his fingers to evaluate its hardness and detects a force, deformation and touch sensation. As soft objects in our environment are finite, the boundary conditions have a significant effect on our evaluation. In this paper, hardness evaluation of soft objects with different kinds of thicknesses was examined and its accuracy was confirmed. In the experiment isolating the thickness information from subjects, the accuracy of evaluation decreased. This result suggests that the accuracy of the thickness and the size of the object severely affect the hardness evaluation in a virtual environment. In a further experiment restricting touch sensation, subjects evaluated the hardness inaccurately according to the force and deformation which was affected by the boundary conditions.

DOI： 10.18974/tvrsj.9.1_27

259 生体機械インピーダンスを用いた筋疲労計測

入江隆, 岡久雄

年次大会講演論文集 2002 137 - 138 2002年

記述言語：日本語出版者・発行元：一般社団法人日本機械学会

This paper examines the relationship between muscle fatigue and its biomechanical characteristics by using biomechanical impedance. Visco-elasticity was calculated from biomechanical impedance. In our experiment, isometric contraction was applied to a subject's forearm with 10 and 15% of maximum voluntary contraction (MVC) for a certain constant period until one got fatigued. The change of visco-elasticity in unloaded and under contraction was observed, and the change under contraction was not mo notonous at most of the subjects. The magnitude of load affected advancing speed of fatigue but did not the tendency of visco-elasticity.

DOI： 10.1299/jsmemecjo.2002.1.0_137

衝撃応答法による生体力学特性の計測（II）－解析方法と筋収縮評価への応用－

入江隆, 岡久雄

バイオメカニズム学会誌 24 ( 3 ) 168 - 173 2000年

記述言語：日本語出版者・発行元：バイオメカニズム学会

生体軟組織の力学特性を計測する場合には,被験者に特別な姿勢を要求したり,測定部位を拘束するようなことを避ける必要がある.これは姿勢によって皮下に存在する筋の緊張状態が変化するためであり,皮膚表面で測定される力学特性に影響を与える.本研究では,まず衝撃力計測システムを用いて測定される波形から荷重時間(衝撃力の加わっている時間)を定義し,波高値(衝撃力の最大値)との関係を調べた.そして,筋の収縮状態と皮膚表面から見た力学特性との関係を波高値と荷重時間,さらに積分筋電図を用いて検討した.その結果,筋の収縮状態と力学特性の間に強い相関関係が確認された.

DOI： 10.3951/sobim.24.168

衝撃応答法による生体力学特性の計測(I) : 計測システムの開発(<特集>マイクロマシン)

その他リンク： http://search.jamas.or.jp/link/ui/2003052835

衝撃応答法による皮膚表面から見た筋力学特性の計測

入江隆, 岡久雄

バイオメカニズム１5−形と動きの探求− ，東京大学出版会 31 - 40 2000年

入江隆, 岡久雄

バイオメカニズム学会誌 22 ( 4 ) 163 - 168 1998年

記述言語：日本語出版者・発行元：バイオメカニズム学会

The authors have measured human tissues from skin surface by using an impact response measurement system, which includes an impact hammer for industrial use. In this measurement system, the force values were not able to be used for analysis and the objectivity of measurement was not ensured completely because the impact forces depended on the way of hammer handling by each experimentalist. Then we developed a biometric impact hammer, which did not depend on an experimentalist, and constructed a measurement system. The proper measurement conditions were examined and the measurement errors of maximum force values were under 5%. Accordingly, this measurement system was practical enough in somatometry.

DOI： 10.3951/sobim.22.163

機械インピーダンスを用いた生体の硬さ計測

岡久雄, 入江隆

バイオメカニズム 12 15 - 25 1994年

記述言語：日本語出版者・発行元：バイオメカニズム学会

The measurement of stiffness on the body surface is of great importance for palpation, percussion and pressation such is used in a detection of an edema in clinics. From the other standpoint of an industrial measurement, it is also significant for getting hold of a soft object such as the hardness sensor of a manipulator. In order to estimate biomechanical properties of the body surface by means of biomechanical impedance, we have developed a measurement system for biomechanical impedance. The system consists of a measuring device, a measuring probe and a personal computer. A vibrator, an impedance head and a load-cell are included in the measuring probe. A random vibration is applied to the body surface through the probe, and force and acceleration at the driving point are detected by the impedance head. The measuring probe is of useful size, and almost all parts of the body surface are measured by the probe. The random vibration method makes a short measurement time possible. The preload (contact force) of probe to the body surface during a measurement is kept constant by means of computer programming. This allowed satisfactory accuracy and measurement repeatability. The mechanical impedance of the body surface is significantly influenced by the measuring conditions (diameter of the vibrating tip of the probe and the preload). It also depends on stratified body structures, such as a bone under the skin surface. The applied vibration is reflected at the layer according to its form and thickness. Consequently there are three typical patterns (soft, intermediate and hard) in the biomechanical impedance spectra. We have proposed a new index SI (Stiffness Index), which is obtained from the mechanical impedance spectrum. The SI has [N/m] dimensionally and indicates a kind of extended spring constant into a visco-elastic medium. The stiffness distribution on the back of the hand is illustrated as a SI mapping. From the mechanical impedance spectrum with a soft pattern, we are able to obtain a visco-elastic constant of the body surface. When the obtained visco-elasticity includes the influences of the stratified structure of the body, it should be termed 'apparent' visco-elasticity. In order to obtain the visco-elasticity of the skin and subcutaneous tissue independent of body structure, we have proposed a correction method for the measured results. This method was applied to the measured result for the chest and the corrected visco-elasticity of the tissue in situ was obtained.

DOI： 10.3951/biomechanisms.12.15

Portable system for measuring biomechanical properties

生体機械インピーダンスの測定値の意味と硬さの指標

入江隆, 岡久雄, 山本辰馬

電子情報通信学会論文誌. D-II, 情報・システム, II-情報処理 = The transactions of the Institute of Electronics, Information and Communication Engineers 75 ( 5 ) 947 - 955 1992年5月

衝撃応答法による生体表面の力学特性の計測

入江隆, 岡久雄, 山本辰馬

電子情報通信学会論文誌. D-II, 情報・システム, II-情報処理 = The transactions of the Institute of Electronics, Information and Communication Engineers 75 ( 4 ) 799 - 807 1992年4月

可搬型生体機械インピーダンス測定装置

入江隆, 岡久雄, 山本辰馬

電子情報通信学会論文誌. D-II, 情報・システム, II-情報処理 = The transactions of the Institute of Electronics, Information and Communication Engineers 75 ( 2 ) 432 - 434 1992年2月

Oka Hisao, Irie Takashi, Hao Sun Yong, Yamamoto Tatsuma

Instrumentation and Measurement Technology Conference 556 - 561 1991年5月

記述言語：英語

<p>A portable system has been developed for measuring biomechanical impedance on the skin surface. The measurement system comprises a measuring probe and a measuring device. The probe is of the pen-type. The device includes a random noise source, amplifiers, an A/D converter, a microcomputer, a liquid crystal display and a floppy disk unit. The biomechanical impedances on the skin surface are measured and the skin viscoelasticity are obtained. SI (stiffness index) is proposed as the new index of skin stiffness. The coefficient of correlation between SI and palpation scores is 0.797</p>

DOI： 10.1109/IMTC.1991.161656