Measuring and testing – Vibration – By mechanical waves
Patent
1991-04-22
1992-08-25
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
367902, G01S 1508
Patent
active
051408597
ABSTRACT:
A master transceiver and a slave transceiver are employed for providing an accurate measurement of the distance between two locations in which these transceivers are situated. A pulse signal is generated by the master transceiver, which requires a time period of t1 to travel to the slave transceiver. After a time delay of t2 upon the receipt of the pulse signal by the slave transceiver it transmits a response signal back to the master transceiver. The response signal requires the same time period of t1 to be received by the master trasnceiver. The total time involved is compared with a reference time to distance circuit in the master transceiver to determine the distance between the two units and the distance is shown on a digital display.
REFERENCES:
patent: 4254478 (1981-03-01), Dumas
patent: 4581726 (1986-04-01), Makino et al.
patent: 4752917 (1988-06-01), Dechape
Finley Rose M.
Williams Hezron E.
Wong David W.
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