Apparatus for monitoring the approach of two relatively movable parts
First Claim
1. Apparatus for monitoring first and second relatively movable parts comprising an actuator connected to one of the first and second parts and including a transponder, a sensor connected to the other one of the first and second parts and including a receiver circuit with a receiver coil, and a reduction coil which is arranged so that its magnetic field reduces a magnetic field of the receiver coil in a predetermined manner, the transponder being adapted to touchlessly transmit a bit-coded transponder signal to the sensor when a distance between the actuator and the sensor falls below a predetermined value, wherein the receiver circuit being adapted to compare the transponder signal to a stored bit sample for generating a monitoring output signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An arrangement for monitoring first and second relatively movable parts in which an actuator is connected to one of the first and second parts. The actuator includes a transponder. A sensor is connected to the other one of the two parts and has a receiver circuit with a receiver coil. A reduction coil is arranged so that its magnetic field can reduce a magnetic field of the receiver coil in a predetermined manner. The transponder touchlessly transmits a bit-coded transponder signal to the sensor when a distance between the actuator and the sensor falls below a predetermined value, and the receiver circuit compares the transponder signal to a stored bit sample for generating a monitoring output signal.
6 Citations
10 Claims
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1. Apparatus for monitoring first and second relatively movable parts comprising an actuator connected to one of the first and second parts and including a transponder,
a sensor connected to the other one of the first and second parts and including a receiver circuit with a receiver coil, and a reduction coil which is arranged so that its magnetic field reduces a magnetic field of the receiver coil in a predetermined manner, the transponder being adapted to touchlessly transmit a bit-coded transponder signal to the sensor when a distance between the actuator and the sensor falls below a predetermined value, wherein the receiver circuit being adapted to compare the transponder signal to a stored bit sample for generating a monitoring output signal.
Specification