Position sensor arrangement for detecting a signal after a time

Details Position sensor arrangement for detecting a signal after a time Position sensor arrangement for detecting a signal after a time

1992-02-07

1993-06-22

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420713, 32420722, 32420726, G01B 714

Patent

active

052218961

ABSTRACT:
In order to supply water into a water tank mounted on a train, a position detecting apparatus and method is developed for assisting connection of the tube coupler of the water tank with the tube coupler attached to the working terminal of a robot placed on the ground. Either one of the train and the working terminal of the robot is provided with a target circuit composed of a target coil and a capacitor connected in parallel while the other is provided with an excitation circuit, a sensor coil and a detector. The excitation circuit is provided with a power coil driven by an AC power source for generating magnetic field to induce current in a target coil. The magnetic flux center line of the sensor coil is orthogonal to that of the power coil so that the sensor coil does not sense the magnetic field generated by the power coil but senses only the magnetic field generated by the target coil. The output level of the sensor coil corresponds to the relative positions of the target coil and the sensor coil. The detector detects the output level of the sensor coil having a predetermined phase difference from the output of the AC power source. Thus, the position detection can be carried out under poor environment, and also the arrangement can be simplified since the target circuit requires no power source.

REFERENCES:
patent: 4401987 (1983-08-01), Trenkler et al.
patent: 4816759 (1989-03-01), Ames et al.
patent: 4985691 (1991-01-01), Pulyer et al.
Hamamatsu Technical Data for PDS Series Jul. 1989.

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