SHAFT ROTATION ANALYZER USING CONSTANT VOLTAGE VARIABLE CAPACITANCE TRANSDUCER

摘要

a voltage is applied to a variable capacitor (503) coupled to a rotating shaft (s). when the tree (s) is a variable capacitor, the capacity of producing (503), the input and output of a displacement current to the variable capacitor (503) and outside of the united states, in response to the rotation of the shaft (s).a current voltage converter (501, 502, 504) couvertit the displacement current in a voltage level responsive to the instantaneous speed of the tree.we obtain a tree rotation analyzer which is so sensitive that it can detect the 'signatures' of rotation of the tree (s) (for example, speed variations of the tree due to the contact of switch of electric motor, the variation of the teeth, and others).we use several techniques and structures to reduce the effects of the magnetic dispersion is to increase the linearity of the change in capacity, and reduce variations in capacity due to the axial displacement of the shaft.