Capacitance-type displacement measuring device with electrodes h

Details Capacitance-type displacement measuring device with electrodes h Capacitance-type displacement measuring device with electrodes h

1995-11-16

1997-11-25

Karlsen, Ernest F.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324686, 324690, 34087037, 341 15, 33784, G01R 2726, G01B 318

Patent

active

056916469

ABSTRACT:
A rotary encoder 10 is composed of a halfway cylindrical stator 11 and a cylindrical rotor 12. The rotor 12 is disposed coaxial with the stator 11 with a predetermined gap. Plural transmitting electrodes 13 with spiral patterns and receiving electrode 14 with a rectangular pattern are formed on the inner surface of the stator 12. The transmitting electrodes 13 and receiving electrode 14 are formed of a FPC substrate 17 with lead lines 15, 16. On the outer surface of the rotor 12, coupling electrode 18 are formed with a spiral pattern so as to be capacitively coupled to the transmitting electrodes 13 and receiving electrode 14. FIG. 4C

REFERENCES:
patent: 4864300 (1989-09-01), Zaremba
patent: 4882536 (1989-11-01), Meyer
patent: 4951048 (1990-08-01), Ichikawa et al.
patent: 5239307 (1993-08-01), Andermo
patent: 5461320 (1995-10-01), Strack et al.
patent: 5495677 (1996-03-01), Tachikake et al.
patent: 5534859 (1996-07-01), Meyer

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