edwincp@homxb.UUCP (E.MUTH) (03/14/86)
Several Years Ago, I read an advertisement in SAIL or some other such magazine on a knotmeter which measured doppler phase difference through the hull of a boat in order to determine the speed over water. Basically, the instrument mesured time delay between two trancducers, for transducer 1 to transducer 2 and also for transducer 2 to transducer 1. The difference in delay will allow computation of the speed of the medium. The method is often used in industry for velocity measurements of corrosive fluids inside plastic piping, because of its nonintrusive quality. I would like some help from anyone who 1) Can point me to some technical litterature on the subject 2) Can tell me who makes these types of instruments 3) Owned a system or knows the hearsay of the performance of these systems. I greatly appreciate any help on this. Thanks in advance. Edwin Muth homxb!edwincp (201) 834-1447 AT&T Consumer Products in Holmdel Keyport Yacht Club, Keyport, NJ
mat@amdahl.UUCP (Mike Taylor) (03/20/86)
In article <1324@homxb.UUCP>, edwincp@homxb.UUCP (E.MUTH) writes: > > Several Years Ago, I read an advertisement in SAIL > or some other such magazine on a knotmeter which > measured doppler phase difference through the > hull of a boat in order to determine the > speed over water. > > 2) Can tell me who makes these > types of instruments > Brookes & Gatehouse make such a speed measurement system. -- Mike Taylor ...!{ihnp4,hplabs,amd,sun}!amdahl!mat [ This may not reflect my opinion, let alone anyone else's. ]