DEVICE TO DETECT DIRECTION AT SOUND SOURCE Russian patent published in 2013 - IPC G01S3/80 

FIELD: instrument making.

SUBSTANCE: in a device for detection of a direction at a sound source comprising a photoelectric shadow device and a system of information processing, in a radiating part comprising a laser and a collimating lens, there is a beam splitter installed, which generates a reference channel, signals of which are subtracted with signals of two information channels. In the receiving part comprising a focusing lens and a beam splitter generating two information channels, light beams are focused at edges of knives installed perpendicularly to each other and reacting at variation of a gradient of a refraction (density) index in two mutually perpendicular directions, which makes it possible to indicate light variation proportionally to projections of light spots movement sections in the plane of knives on the axis X and Y, which is information on a direction at a sound source. Further electric signals after amplification and subtraction are digitised, afterwards arrive to two branches of information processing, one of which, comprising two devices that measure mean square deviation, after a divisor produces a tangent F_i, i.e. angle module, and the second branch consisting of a multiplier of instantaneous signals of a device that measures mathematical expectation, and a threshold device with a zero threshold, defines an angle sign, afterwards signals from both branches of information processing arrive to the inlet of the programmed logical integrated circuit, which defines direction at a sound source.

EFFECT: increased sensitivity and accuracy of a device.

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