| 摘要 |
PROBLEM TO BE SOLVED: To provide a grinding burn determination device capable of accurately determining grinding burn of a test object formed in grinding, and a grinding burn determination method.SOLUTION: The grinding burn determination device: passes an AC current to a test coil that is brought into contact with or moved close to a ground annular, cylindrical, or spherical test object; generates an eddy current to the test object by a magnetic field induced by the AC current; measures an impedance change in the test coil that is changed by the magnetic field induced by the generated eddy current; and determines the grinding burn from an eddy current signal obtained by causing the test object to make at least one revolution and performing a measurement, or causing the test coil brought into contact therewith or moved close thereto, to make at least one revolution and performing a measurement. |
