Sensor for the capacitive measurement of film with thicknesses

Details Sensor for the capacitive measurement of film with thicknesses Sensor for the capacitive measurement of film with thicknesses

G - Physics

01

B

G01B 7/06 (2006.01) G01D 5/24 (2006.01)

Patent

CA 2355459

A sensor for the capacitive measurement of film thicknesses, with a drum (10), which rolls along the film (12) and has at least one measuring capacitor (C1- C4), the plates of which are disposed in the peripheral surface of the drum (10), so that its capacitance is effected by the thickness of the firm, and with a transformer (26), for transmitting the measurement signal from the rotating drum (10) to the stationary part (28), wherein an oscillator (OSZ1 - OSZ4), which is integrated in the drum (10), generates a frequency signal (24), which depends on the capacitance of the measuring capacitor (C1 - C4).

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