DEVICE FOR ACCOUNTING FISH IN WATER STREAM Russian patent published in 1996 - IPC

FIELD: gaging. SUBSTANCE: device has chamber 1 with partitions 3 to form passages 2. Two optical sensors 4 and 5 are placed in each passage. Analyzer 6 to define direction of fish motion is installed in each passage. The device has computer unit 7 and indicator 8. The device provides computation of fish length when it passes completely through the optical sensor, and does not allow repeated computation of fish beings returned after complete passing the optical sensors. EFFECT: increased accuracy. 2 cl, 4 dwg, 1 tbl