Measuring and testing – Specimen model or analog
Patent
1986-12-19
1988-03-08
Noland, Tom
Measuring and testing
Specimen model or analog
73 3, 7386125, G01F 2500, G01F 166
Patent
active
047292474
ABSTRACT:
A circuit simulating the electrical signal response of a flowing liquid whose velocity is to be measured by a Doppler flowmeter. The circuit takes the electrical flowmeter transmit signal from a Doppler flowmeter and modifies its frequency to derive a simulated Doppler shifted signal. The latter signal is used to modulate the transmit signal in a double side band, balanced modulator which suppresses the frequency of the transmit signal and produces upper and lower side band frequencies mimicking a Doppler shifted return signal. The latter signal is fed to the signal receiving transducer of a Doppler flowmeter for test purposes.
REFERENCES:
patent: 4579005 (1986-04-01), Brown
Manning Technologies, Inc.
Noland Tom
Schneck Thomas
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