FIELD: physics.
SUBSTANCE: laser device for measuring water flow rate has transmitting channel with diffraction-optical splitting of the laser beam and a receiving channel. The receiving channel has a focusing lens, a diaphragm, a photodiode and a preamplifier connected to a Doppler signal converter. The laser measuring device has a computer, and the receiving channel additionally includes a second diaphragm and a second photodiode with a preamplifier connected to a second Doppler signal converter. Outputs of the Doppler signal converter are connected to the computer.
EFFECT: minimising velocity measurement error caused by the boundary layer.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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SU1795371A1 |
| 0 |
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SU1670425A1 | |
| LASER DOPPLER SENSOR OF VELOCITY OF MOVING OBJECT | 2008 |
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RU2144194C1 |
