METHOD FOR CORRECTING ERROR IN OUTPUT SIGNAL OF STRESS SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a system for automatically correcting errors to be introduced into a tissue stress signal caused by a temperature, secular change or other factors which gives influence to a tissue stress sensor. SOLUTION: A tissue contact stress sensor and a reference sensor are constructed with substantially the same material and at the same time. The tissue contact stress sensor corresponds to tissue stress in a superficial blood vessel area and the reference sensor has a fixed structure which is not varied by the tissue stress. These two sensors are in the same environment so as to equally receive influence by a passing time, the temperature and other environmental factors. Then, the subject method has such a step as combines an output signal transmitted from the stress sensor and the reference sensor by such a manner as removes the influence of the secular change and environmental main factors from the output of the stress sensor.