Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1984-02-16
1987-02-17
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367111, 367112, 367900, G01S 1596, G01S 756
Patent
active
046445129
ABSTRACT:
A computer system is proposed for finding and displaying the depth and depth related values of an object in an aquatic environment in which and LCD display is subdivided into segments each representing a fraction of the total depth range in which the system is operating as well as a fraction of the transit time for the transmission of pulses within the depth range. Each segment is addressed and activated in response to the presence of a receiver output in the microprocessor for a given number of consecutive time-scans, thus providing a quasi-analog visual display of depth on the array of the segmented scale.
REFERENCES:
patent: 3539978 (1970-11-01), Stedtnitz
patent: 3683324 (1972-08-01), Hoxsie
patent: 3942149 (1976-03-01), Westfall, Jr.
patent: 4122429 (1978-10-01), Hatai
Farley Richard A.
Greigg Edwin E.
Ketcham & McDougall, Inc.
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