METHOD FOR CONSTRUCTING ABSOLUTE ANGLE TRANSDUCER Russian patent published in 2017 - IPC G01C1/00 

FIELD: measuring equipment.

SUBSTANCE: in the method of constructing an absolute angle transducer, a disc data storage, mounted on a precision axis, is used. Three concentric encoding tracks with the number of strokes equal to N, N-1 and N-k, forming systems of rough and accurate angle readings. The beginning of the absolute type converter scale is defined and phase modulation of the radiation striking upon the diffraction grid is used. The necessary diffraction orders are selected and brought to interference by means of three interferometers. As a result, three phases of interference signals from three interferometers are allocated at their outputs and form the output value of the angle with high resolution.

EFFECT: possibility of increasing the resolution power of the absolute angle transducer from the full revolution of the transducer rotor with significantly smaller dimensions.

2 cl, 4 dwg