Telemetric process for measuring short distances

Details Telemetric process for measuring short distances Telemetric process for measuring short distances

1991-09-12

1992-12-29

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls radar system

Transmitter

342 98, 342135, 342145, G01S 1332

Patent

active

051755530

ABSTRACT:
A telemetric process for measuring short distances comprises emitting an electromagnetic signal modulated by a pseudo-random sequence having a number (n) of bits delivered at a clock frequency (fH), correlating the echo detected with the modulated signal time-delayed by known means, and varying the clock frequency, as a function of the correlation measurement, within an operational field divided into a plurality of operating ranges, the number of bits inthe pseudo-random sequence being modified accoridng to the operating range of the clock frequency. The process is particlualry useful for proximity measurement close to a reflecting surface.

REFERENCES:
patent: 3216010 (1965-11-01), Roeschke
patent: 3614785 (1971-10-01), Kratzer
patent: 3882494 (1975-05-01), Bolger
patent: 4014021 (1977-03-01), Fournier et al.
patent: 4053888 (1977-10-01), Robin et al.
patent: 4078234 (1978-03-01), Fishbein et al.
patent: 4396916 (1983-08-01), Schnerk

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