Kenji Nishibori

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In multimedia applications, various video encoding/decoding standards such as MPEG2, MPEG1 and emerging algorithms call for a DSP solution of the extremely computation-intensive tasks. Several DSPs have been developed based on intensive pipeline processing at the macro-block level. In these DSPs, macroblock-based pipeline memory slices are needed for each(More)
This paper proposes measurements of a two-dimensional inclination angle of a mirror, and its distance to the mirror, using four infrared LEDs that are located around a position sensitive detector (PSD). The light of each LED is reflected by a mirror and focused on the two-dimensional PSD through a lens. This method has many advantages. The mirror's(More)
This paper describes a theory and experimental results concerning a passive aerial acrobat robot without electric power. As the robot performs hand-to-hand on its flying trapeze, it utilizes no electricity but simply draws power from the mechanical potential energy of its swings. The robot, holding onto the trapeze, overcomes the rotation moment by aid of a(More)
A traveling wave-type ultrasonic motor (USM) has a self-locking characteristic due to a static frictional force present when its power supply is turned off, because its rotor is pressed strongly to the stator in the USM. We propose a pulse width modulation (PWM) method in consideration of this self-locking characteristic in order to control the motion of(More)
In this paper, we propose a cylindrical tactile sensor for robot hands that can simultaneously detect the contact angle, contact location, and magnitude of the contact force. This sensor consists of an inner frame with light sources and an outer shell to which two position sensitive detectors (PSDs) are fixed; the concentric outer shell and inner frame are(More)
There is a serious problem of aging of the craftsmen who have tie-dyeing technique of Japanese traditional craft “Shibori”. In substitution for “tying” process by thread on tie-dyeing, this paper proposes usage of elastic cap with different thickness at the both ends. A cloth is pushed into the cap by a needle of 1 mm diameter(More)
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