| 摘要 |
PROBLEM TO BE SOLVED: To provide a displacement measurement device capable of generating as much accurate signal as possible and heightening measurement accuracy, and a signal processing device and a signal processing method that are used therein.SOLUTION: A displacement measurement device 100 includes an encoder unit 10 and a signal processing device 30. The signal processing device 30 is provided with an AD conversion unit 31, a standardization unit 33, an inverse trigonometric function calculation unit 35, a change amount calculation unit 37, and a displacement calculation unit 39. A sinusoidal signal generated by the encoder unit 10 is standardized by the standardization unit 33, and calculation pertaining to the amplitude value of the signal can thereby be simplified. Also, a triangular wave signal including a linear area can be obtained by the inverse trigonometric function calculation of the inverse trigonometric function calculation unit 35. Due to the fact that the change amount calculation unit 37 calculates a change amount per prescribed time of the signal in the linear area, the displacement measurement device 100 can generate an accurate signal and perform high-accuracy measurement.SELECTED DRAWING: Figure 1 |
