Method and apparatus for determining physical quantities

Details Method and apparatus for determining physical quantities Method and apparatus for determining physical quantities

G - Physics

01

B

349/31, 343/98

G01B 17/00 (2006.01) G01B 3/18 (2006.01) G01K 11/24 (2006.01) G01S 15/08 (2006.01) G01S 15/10 (2006.01) G01S 15/46 (2006.01)

Patent

CA 1171951

ABSTRACT OF THE DISCLOSURE A distance R to be measured is derived by measuring the spacing xm between a fixed transmitter Tx and a movable receiver Rx, and comparing this with the reference spacing xref between a fixed transmitter Tx' and receiver Rx. Each spacing is measured by passing a large number of pulses sequentially from receiver to transmitter through a coupling medium, the receipt of one pulse triggering transmission of the next. The spacing is derived from the time T taken to pass n pulses; preferably n is fixed and T is measured.

373418

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