DEVICE FOR MEASURING SIZE OF OBJECTS Russian patent published in 2009 - IPC G01B11/02 

FIELD: physics, measuring.

SUBSTANCE: device for the control of the geometrical sizes of objects contains a radiant of light radiation, optically related to it multiscan photodetector, having the index and target busbars, consistently included two radiants of bias, the block of transformation of a multiscan output current, "current-pressure" including consistently joined transformer, the high-frequency filter, the detector and the integrator. And also the modulator, bias radiants are joined by separate deductions to deductions of the index busbar, the inlet the transformer "current-pressure" is joined to the multiscan output busbar, the integrator exit is joined to a blanket deduction of radiants of bias. The device is in addition is supplied by the second radiant of light radiation, opticaly related to a photodetector, an analogue-digitiser, a control computer system and the circuit changer. The modulator output is joined to a signal input of the circuit changer, the first and second outputs of the circuit changer are joined to the first and second radiants of light radiation. The inlet is analogue-digitiser joined to an integrator output, and its output - with a control computer system input, the output of the last is joined to inputs of guidance of the circuit changer and analogue-digitiser.

EFFECT: increase of accuracy of the device for measuring of the sizes of objects and its maintenance by operation of the device in the conditions of background light noises.

2 dwg