Method of measuring a distance

Details Method of measuring a distance Method of measuring a distance

1986-04-21

1988-06-14

Blum, Theodore M.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

367128, 367 2, G01S 380

Patent

active

047516895

ABSTRACT:
Disclosed is a method for measuring a distance by using a radio-wave and an ultra-sonic wave. The method includes the steps of generating a certain start pulse in the form of a radio-wave between a measuring position and a position to be measured from the measuring position, receiving the radio-wave at the position to be measured while simultaneously generating an ultra-sonic wave from the same measuring position, determining a time difference between the moment of generating the start pulse and the moment of receiving the ultra-sonic wave, and multiplying the obtained difference by the sonic velocity.
The method of measuring distances by utilizing the radio-wave and the ultra-sonic waves is very accurate without false operation and is simple, brief and convenient to use.

REFERENCES:
patent: 3949605 (1976-04-01), Stallworth et al.
patent: 4136394 (1979-01-01), Jones et al.
patent: 4399556 (1983-08-01), Whidden

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