Doppler radar flowmeter
A Doppler radar flowmeter is described. It consists of a transceiver which produces an ausio 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 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 allow calibration without the necessity of being able to visually observe the flow.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4091385
- OSTI ID:
- 6551683
- Resource Relation:
- Patent File Date: Filed date 24 Nov 1976; Other Information: PAT-APPL-744,495
- Country of Publication:
- United States
- Language:
- English
Similar Records
Doppler flowmeter
Doppler flowmeter