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AssigneeSeiko Epson Corporation
InventorAkitoshi MAEDA
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A position detecting device detects the position of a moving body by using first and second detected signals that have voltage values changing in connection with a movement of the moving body. The position detecting device includes a difference computing unit that computes first and second difference values, the first being the difference between a center voltage of the first detected signal and the voltage value of the first detected signal, and the second being the difference between a center voltage of the second detected signal and the voltage value of the second detected signal. A ratio computing unit computes a difference-sum ratio index in accordance with the ratio of the difference value between the absolute values of the first and second difference values and the absolute value of the second difference value to the sum of the absolute values of the first and second difference values.
A position detecting device that detects the position of a moving body by using a first detected signal and a second detected signal that have voltage values changing in connection with a movement of the moving body and have a phase difference, the device comprising:
A position detecting method that detects the position of a moving body by using a first detected signal and a second detected signal that have voltage values changing in connection with a movement of the moving body and have a phase difference, the method comprising:
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