System for measuring the time for a signal to pass between two s

Details System for measuring the time for a signal to pass between two s System for measuring the time for a signal to pass between two s

1990-10-11

1993-01-12

Woodiel, Donald O.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

73596, G01F 166

Patent

active

051780186

ABSTRACT:
A measurement system for measuring the time for a signal to pass between two transducers TDR1,2 to allow fluid speed or flow to be determined in a gas meter for example. Each transducer can transmit or receive signals. The system is controlled by a microcontroller 31 and a signal with a phase change acts as a marker which is transmitted from transmitter 21 via matching stage 22,23 from one transducer and is received by the other. On receipt via the matching stage and amplifier 24 it is sampled by capacitor array 25 and detected in detector 29. Amplitude information from array 25 is made available to the microcontroller to compute time of signal travel and hence flow rates.

REFERENCES:
patent: 4424715 (1984-01-01), Hansen
patent: 4787252 (1988-11-01), Jacobson et al.

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