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:
May. 04, 1982
Filed:
May. 05, 1980
Joseph W Dickey, Annapolis, MD (US);
Paul M Moore, Gaithersburg, MD (US);
Lloyd E Powell, Annapolis, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
The invention relates to a leak detecting device for pipe systems having electronic channels for processing the acoustical signals from the source of the leak to determine the direction of propagation of the leak signal. Each channel includes a transducer, an amplifier unit, a variable delay unit for delaying the transmission of signals received from the amplifier unit, and a multiple-averager unit which respectively multiplies and then averages input signals from the variable delay unit of the same channel and, depending on the mode of operation, from the amplifier unit of either the same or the other channel. Operating in a first mode to determine the frequency and wavelength of the primary leak signal, the signals from the variable delay unit of one channel are combined with the signals from the amplifier unit of the same channel in the multiplier-averager unit. Upon determining the wavelength of the primary leak signal, the transducers are spaced apart by about one-quarter of such wavelength and attached to the pipe. Operating then in a second mode to determine the direction of propagation of the acoustical leak signal, the multiplier-averager unit of one channel receives signals from the variable delay unit of the same channel and the amplifier unit of the other channel.