Tire balance measurement device, evaluation method of tire balance measurement device, calibration method of tire balance measurement device, and calibration program of tire balance measurement device

An evaluation method of a tire balance measurement device including

• a pair of rims,
• a rotation drive portion which rotates the pair of rims,
• an eccentric force measurement unit which measures an eccentric force generated in a main shaft when the main shaft which supports at least one of the pair of rims is rotated, and
• a calculation unit which calculates an eccentric amount of the main shaft based on the eccentric force measured by the eccentric force measurement unit,
• the method comprising:
• a step of evaluating the eccentric amount of the main shaft, on which no tire is interposed, based on a correlation between the eccentric amount calculated by the calculation unit based on the eccentric force measured when the main shaft is rotated at a predetermined rotation speed by the rotation drive portion, and the rotation speed.

A calibration method of a tire balance measurement device including

• a pair of rims,
• a rotation drive portion which rotates the pair of rims,
• an eccentric force measurement unit which measures an eccentric force generated in a main shaft when the main shaft which supports at least one of the pair of rims is rotated, and
• a calculation unit which calculates an eccentric amount of the main shaft based on the eccentric force measured by the eccentric force measurement unit,
• the method comprising:
• a step of evaluating the eccentric amount of the main shaft, on which no tire is interposed, based on a correlation between the eccentric amount calculated by the calculation unit based on the eccentric force measured when the main shaft is rotated at a predetermined rotation speed by the rotation drive portion, and the rotation speed;
• and
• a step of correcting Calculation Expression used in a calculation by the calculation unit based on an evaluation result of the eccentric amount by the step of evaluating the eccentric amount of the main shaft.

A calibration program of a tire balance measurement device including

• a pair of rims,
• a rotation drive portion which rotates the pair of rims,
• an eccentric force measurement unit which measures an eccentric force generated in a main shaft when the main shaft which supports at least one of the pair of rims is rotated, and
• a calculation unit which calculates an eccentric amount of the main shaft based on the eccentric force measured by the eccentric force measurement unit,
• the program comprising:
• processing of evaluating the eccentric amount of the main shaft, on which no tire is interposed, based on a correlation between the eccentric amount calculated by the calculation unit based on the eccentric force measured when the main shaft is rotated at a predetermined rotation speed by the rotation drive portion, and the rotation speed;
• and
• processing of correcting Calculation Expression used in a calculation by the calculation unit based on an evaluation result of the eccentric amount by the processing of evaluating the eccentric amount of the main shaft.