SEA TURBIDIMETER Russian patent published in 1998 - IPC

FIELD: study of unstationary processes in bed boundary layer. SUBSTANCE: proposed sea turbidimeter is designed for study of unstationary processes going on in bed boundary layer where sufficiently large ( > 50 μ ) particles of inorganic origin with high concentrations ( > IO.O g/l ) prevail and specifically for seeking empirical dependences describing process of transport of accretions. Sea turbidimeter has body, number of turbidimetric channels each manufactured in the form of reference voltage source and modulator and source of red light radiation connected in series optically coupled to photodetector which is connected in series with photocurrent amplifier and demodulator which controlling input is connected to synchronization output of modulator, number of tensometric channels, processor and indicator. Body has two supports which correspondingly carry sources of light radiation and photodetectors of turbidimetric channels, each being provided with differential amplifier and feedback photodetector optically coupled to source of red light radiation. Feedback photodetector is connected in series with second photocurrent amplifier and second demodulator which controlling input is connected to synchronization output of modulator. Outputs of reference voltage source and second demodulator are connected to inputs of differential amplifier which output is connected to input of modulator. Outputs of demodulators form outputs of turbidimetric channels connected to first group of inputs of processor. Second group of inputs of it is connected to outputs of tensometric channels and outputs of processor are connected to inputs of indicator. EFFECT: improved functional characteristics and reliability of turbidimeter. 10 cl, 9 dwg