Schlumberger Industries

Solartron Group Limited

Adrian Vivian Lewis

Jolyon P Willson

Teresa M Roberts

Douglas Dennis Weller

Stephen Tony Kuc

Robert Stuart Burridge

Graham K Thornton

Kevin Anthony Snoad

A displacement sensor comprises a measuring head which measures displacement by variation in frequency of an oscillator due to movement of a core in a coil. The signal from the oscillator is used to gate a high frequency crystal clock into a counter. The count is representative of the change in frequency of the oscillator and thus the displacement to be measured. The count is compared by a microprocessor with a look-up table stored in the memory during initial calibration. The operating and processing electronics connected to the sensor head are mounted in a connector which can be directly coupled to connectors of other sensors to form a bus connecting multiple sensors to a data logger or computer.

Network-connectable displacement sensor with stored ID

A relative position transducer for determining the angular position of a first member angularly movable relative to a second member includes a coded track on the first member, a read head mounted on the second member, drive means for oscillating the read head to scan over and read a limited region of the coded track, and a microcomputer for interpreting the code read by the read head as the position. A first sensor detects when the read head is in a predetermined reference position and a second sensor detects the end points and direction of the read head scan. The sensor outputs are connected to the computer for correct interpretation of the read head output. An interplation is used to improve the accuracy of the position determination.

Relative position transducer for oscillating and scanning a read head

Growing community of inventors

Chichester, United Kingdom

Adrian Vivian Lewis