Electricity: measuring and testing – Magnetic – Displacement
Patent
1995-04-14
1998-02-03
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Displacement
32420712, G01B 714, G01B 730, G01D 5244, G01D 520
Patent
active
057148821
ABSTRACT:
A position detector with data evaluation circuit has at least one sensor which, in dependence on movement by which the position to be monitored alters, supplies electrical output signals to a circuit arrangement which produces there from a digital signal and puts it into intermediate storage until it is transferred to an evaluation unit. The digital signal reproduces in encoded form the position to be monitored. An energy converter converts a part of the kinetic energy of the movement into electrical energy and an energy storage means stores the electrical energy and provides same for supply to the circuit arrangement. A monitoring circuit outputs a control signal in response to a threatening drop in the supply voltage below a critical limit value. When the control signal occurs the digital signal is written into a non-volatile information storage means, in order thereby to make the position detector independent of an external power supply.
REFERENCES:
patent: 4049951 (1977-09-01), Baty et al.
patent: 4127812 (1978-11-01), Baliguet
patent: 4560887 (1985-12-01), Schnieder
Mehnert Walter
Theil Thomas
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