Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent
1981-06-26
1984-05-08
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Returned signal used for control
354 64, 354 76, G01S 1588, G01S 760
Patent
active
044478968
ABSTRACT:
This disclosure is concerned with problems of energy conservation and more effective utilization at desired critical times only in, for example, sonar-triggered underwater elapsed time strobe photography of objects or scenes or in applications having similar problems; accomplishing such and other ends by restricting optical and sonar monitoring to relatively low periodicity intervals until the desired object has come within range, whereupon the apparatus automatically changes mode to take rapid successive strobe photographs or other records supplemented by contemporaneous sonar recording.
REFERENCES:
patent: 2872622 (1959-02-01), Edgerton
patent: 4105990 (1978-08-01), Rines et al.
patent: 4121190 (1978-10-01), Edgerton et al.
patent: 4335944 (1982-06-01), Marshall
Rines et al., "Search for the Loch Ness Monster", Technology Review, Mar./Apr. 1976, pp. 25-40.
Edgerton et al., "An Elapsed-Time Photographic System for Underwater Use: Proc. of the 8th Internat'l Congress on High Speed Photo," John Wiley and Sons, 1968.
Farley Richard A.
The Academy of Applied Science Inc.
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