Position controlling apparatus
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United States of America Patent
Stats
-
Dec 18, 1990
Grant Date -
N/A
app pub date -
Oct 27, 1989
filing date -
Feb 8, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The position controlling apparatus of this invention is to curve an endoscope insertable part or a catheter and is provided with an actuator having a shape memorizing alloy body. The shape memorizing alloy body is heated or cooled by a driving appartaus and the actuator is displaced by such heating or cooling. The difference between the actual displacement of the actuator driven by the driving apparatus and the objective displacement of the actuator is output by a comparing means which operates the driving apparatus on the basis of this difference. A resistance value detecting circuit detects the resistance value of the shape memorizing alloy body varying when the shape memorizing alloy body is heated or cooled. The detected value detected by the resistance value detecting circuit is input into a controlling apparatus which controls the driving apparatus on the basis of the detected value and the preset used temperature range of the shape memorizing alloy body.
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