STUDIES ON PHYSICAL LOCOMOTION PURSUIT ANALYZER, UTILIZING ELECTRICAL ENGINEERING / 体力科学

ABSTRACT

In the studies of physical motion analysis the multiple photographic method with a stroboscope or the fast motion picture which has been used, are not sufficient to pursue a motion of some kinds of sports and of some hidden physical spot only from one direction and difficult to synchronize picture obtaind from three direction.<BR>To make use of electrical engineering from the points of Physiology and Kinesiology, it is worthy of pursuing a physical motion on three dimensions, up & down, right & left and before & behind at once, and furthermore, physiological phenomena in electrocardiogram and electromyogram with connection to the above analyzer.<BR>For that purpose a physical locomotion pursuit analyzer (SN-type, refered to PLPA later on) was devised.<BR>The present devised analyzer is composed of a three dimensions-accelerometor in a gyroscope, a preamplifier, a integration amplifier and a pen-writing recorder.<BR>As already known in the principle of physics, velocity can be obtained by single integration of acceleration rate and displacement by double integration of a acceleration rate.<BR>In above the PLPA, therefore, acceleration rate, velocity and displacement, each of three dimensions can be determined. Capacity of the present analyzer was as follows; Frequency rate 1.5-20.0 HZ (Static accelerated component under 1.5 HZ was cut by differentiation circuit of DC-cut), time constant of electrical integration circuit about 0.2sec.<BR>In the present report the outline of PLPA and some data of our experiments obtained by use of it were dealt.<BR>The problems of the telemetering system of this analyzer and digital exhibition by connection to computer require further study.