Noise processing apparatus

摘要

A noise processing apparatus measures a first potential difference signal, between a first electrode and a second electrode that is used as a reference electrode, and measures a second potential difference signal, between the second electrode and a third electrode that is arranged on the steering unit in the apparatus. The apparatus calculates the difference between the intensities of the first potential difference signal and the second potential difference signal calculated at the predetermined intervals. The apparatus corrects the first potential difference signal or the second potential difference signal by using the calculated difference such that the intensities of the first potential difference signal and the second potential difference signal are canceled out. The apparatus calculates a differential signal indicating the difference between the first potential difference signal and the second potential difference signal by using the corrected potential difference signal, and outputs the differential signal.

主权项

1. A noise processing apparatus comprising:
a first measuring unit that measures a first potential difference signal between a first electrode that is arranged at a location other than a steering unit in an apparatus and a second electrode that is used as a reference electrode; a second measuring unit that measures a second potential difference signal between the second electrode and a third electrode that is arranged on the steering unit in the apparatus; an intensity calculating unit that calculates a predetermined period of the first potential difference signal and second values each corresponding to a predetermined period of the second potential difference signal; a difference calculating unit that calculates differences between the first values and the second values, respectively; a correction unit that corrects, at the each predetermined period of the first potential difference signal and the second potential difference signal by equalizing the differences between the first values and the second values using each corresponding difference calculated by the difference calculating unit; a differential signal calculating unit that calculates, a differential signal indicating a difference between the first potential difference signal and the second potential difference signal, the first potential difference signal used by the differential signal calculating unit being a corrected first potential difference signal when the first potential difference signal is corrected, and the second potential difference signal used by the differential signal calculating unit being a corrected second potential difference signal when the second potential difference signal is corrected; and an output processing unit that outputs the differential signal calculated by the differential signal calculating unit.