G - Physics – 05 – B
Patent
G - Physics
05
B
G05B 19/19 (2006.01) G01C 3/08 (2006.01) G01S 13/84 (2006.01)
Patent
CA 2359279
A process for measuring the distance of a moving body (12) from a fixed part (10), characterized in that it comprises the steps of: - generating a first alternating signal (r(t)) having a frequency within the radio-wave range or of elastic-wave range; - emitting the first signal from the fixed part towards the moving body (12); - receiving the first signal (r(t) on the moving body (12) and generating, on the moving body (12), a second signal (s(t)) having a frequency (nf) equal to the frequency (f) of the first signal (r(t)) multiplied by a constant factor (n), the second signal (s(t)) having an initial phase (.phi.l) equal to the phase (2.pi.ft1 + .phi.o) at the instant (t1) in which it is received by the moving body (12); - generating, on the fixed part, a third signal (u(t)) having a frequency (nf) equal to the frequency of the second signal (s~t~ ) and an initial phase (.phi.o) equal to the initial phase of the first signal (r(t)); and - determining the variation in distance of the moving body (12) in a pre-set time interval as a function of the variation in the amplitude of an alternating signal obtained from the sum of the second signal (s(t)) and the third signal (u(t)) in the same time interval.
Comau Spa
Macrae & Co.
LandOfFree
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