Surgery – Truss – Perineal
Patent
1995-06-02
1996-07-23
Chin, Stephen
Surgery
Truss
Perineal
345177, G08C 2100
Patent
active
055391605
ABSTRACT:
Oscillation applied to a tablet is sensed by a sensor on the tablet and a time delay from generation of the oscillation to the sensing thereof is measured, whereby distance from the oscillation source to the sensor can be measured. If this distance is measured for each of a plurality of different sensors, the position of the oscillation source on the tablet can be determined. The measured delay time includes not only time for transmission through the tablet but also an error. Accordingly, the delay time between the oscillation source and a sensor is not used as is, one of the sensors is adopted as a reference sensor and a difference in delay time between this sensor and the oscillation source is used to measure the distance between the oscillation source and each sensor. As a consequence, errors attributable to respective sensors are canceled out so that measurement precision is improved.
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Kaneko Kiyoshi
Kobayashi Katsuyuki
Tanaka Atsushi
Tokioka Masaki
Yanagisawa Ryozo
Canon Kabushiki Kaisha
Chin Stephen
Loomis Paul
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