Doppler radar flowmeter
- Uniontown, PA
- Adamsburg, PA
A Doppler radar flowmeter comprises a transceiver which produces an audio frequency output related to the Doppler shift in frequency between radio waves backscattered from particulate matter carried in a fluid and the radiated radio waves. A variable gain amplifier and low pass filter are provided for amplifying and filtering the transceiver output. A frequency counter having a variable triggering level is also provided to determine the magnitude of the Doppler shift. A calibration method is disclosed wherein the amplifier gain and frequency counter trigger level are adjusted to achieve plateaus in the output of the frequency counter and thereby allow calibration without the necessity of being able to visually observe the flow.
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4091385
- OSTI ID:
- 863096
- Country of Publication:
- United States
- Language:
- English
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