The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 1994
Filed:
Aug. 13, 1993
George A Gilmour, Severna Park, MD (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
An apparatus for measuring velocity relative to a reference plane having a linear sonar array disposed in parallel with the direction of travel and including from the foremost position to the rearmost position a first transmitter, a plurality of first receivers, a second transmitter, and a plurality of second receivers. The second transmitter is controlled to transmit a sonar pulse after a predetermined time delay has lapsed since the first transmitter transmitted a sonar pulse. The predetermined time delay is selected such that the second transmitter transmits the sonar pulse when the second transmitter occupies the position which the first transmitter occupied when it transmitted the first sonar pulse. A first set of reception signals, which are generated by the plurality of first receivers in response to reception of echoes of the first sonar pulse reflected from the bottom, is delayed for the predetermined time delay, and then correlated with a second set of reception signals, which are generated by the plurality of second receivers in response to reception of echoes of the second sonar pulse reflected from the bottom. Based on the result of the correlation, the predetermined time delay may be adjusted. The velocity is then determined and displayed. The process is repeated to continually update the velocity.