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Method for measuring in a fluid with the aid of sing-around technique

  • US 5,796,009 A
  • Filed: 10/23/1995
  • Issued: 08/18/1998
  • Est. Priority Date: 10/24/1994
  • Status: Expired due to Fees
First Claim
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1. A method for measuring in a fluid with the aid of a sing-around technique, according to which a transmitter repeatedly transmits sound pulses comprising at least two sound periods in the fluid, and these sound pulses are received by a receiver, which acoustically is disposed opposite to the transmitter, the detection of the reception by the receiver triggering the transmission of a subsequent sound pulse by the transmitter, wherein, at the time of each or every second reception of a sound pulse, a delay is produced, and the transmission of the subsequent sound pulse by the transmitter is triggered with this delay, the delay avoiding interference between a directly received sound pulse and a multiple-reflected sound pulse and the delay equaling at least half the length of the multiple-reflected sound pulse, wherein the delay between reception of the sound pulse and transmission of the subsequent sound pulse is established as a function of the frequency of the received sound pulse.

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