METHOD AND DEVICE FOR DETERMINING HARDNESS DEGREE OF SEMI-SOLID MATERIALS Russian patent published in 2012 - IPC G01N3/42 

FIELD: machine building.

SUBSTANCE: before or when lowering force/path sensor (20) located inside bar (5) of test material, corrected force (F_Ber) measuring value is determined from initial position (S₂₅) to return point (S₅₁), and for multiple measuring moments (t₃₂-t₄₈) there determined is difference of force (ΔF₃₂-ΔF₄₈) between corrected force (F_Ber) measuring value and force value (F₃₂-F₄₈) measured at the corresponding moment (t₃₂-t₄₈), and that zero moment (t₄₁) in which position (21, S₄₁) of test material (5, 8) to zero moment in which the position of test material to zero moment (t₄₁) is used as accurate starting position (21, S₄₁) of surface of the measured material (22).

EFFECT: improving measurement accuracy with simultaneous reduction of sensitivity to electronic and/or mechanical interference.

21 cl, 5 dwg