METHOD FOR DETERMINING DISTANCE TO OBJECT BOUNDARIES Russian patent published in 2018 - IPC G01C3/32 G01B11/00 

FIELD: measuring equipment.

SUBSTANCE: method for determining distance to object’s boundaries includes measuring image size in image cavity of optical device with image sensor, movement of the device along its axis of sight towards or away from the object at fixed distance, again measuring size of object image . Analog signal from matrix is converted to digital, image size is determined in matrix pixels, results are stored and used to determine viewing angles of object's boundaries relative to axis of sight before and after device moving and distances to far D_d and near D_b, boundaries of the object by formulas

where α₁ and α₂ – viewing angles of near and far object’s boundary before device moving in one cavity, deg; β₁ and β₂ - viewing angles of near and far object’s boundary after device moving in the same cavity, deg; N₁ and N_1t – maximum linear dimensions of image of the object above the axis of sight before and after device moving, respectively, pixel; N₂ and N_2t – maximum linear dimensions of the image of the object below the axis of sight before and after device moving, pixel; N₀ – resolving power of image sensor on horizontal or vertical coordinate, pixel; γ – viewing angle of device with image sensor along horizontal or vertical coordinate, deg; S_t – fixed distance, on which device is moved along its line of sight, m.

EFFECT: possibility of determining the distance to object boundaries in cases where it is located asymmetrically and not perpendicular to axis of sight and has near and far boundaries, and determining angles between the axis of sight and object boundaries.

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