Signal processing device, signal processing method, signal processing program, recording medium storing the program, speed detector and servomechanism

A signal processing method for processing a position information signal output from a sensor in accordance with a driving position of a driver and detecting a driving speed of the driver, comprising the steps of:

• a position information signal processing step that processes the position information signal and calculates driving speed information of the driver;
• and
• an internal position information generating step that reflects a latest driving speed information calculated in the position information signal processing step and generates a latest presumed position of the driver as internal position information, wherein
• the position information signal processing step calculates the driving speed information of the driver based on a difference between the position information signal from the sensor and the internal position information generated in the internal position information generating step.

A speed detector, comprising

• a sensor that outputs a position information signal in accordance with a driving position of a driver;
• and
• a signal processing device that processes the position information signal output from the sensor in accordance with the driving position of the driver and detects a driving speed of the driver, wherein
• the signal processing device includes:
• a position information signal processor that processes the position information signal and calculates the driving speed information of the driver;
• and
• an internal position information generator that reflects a latest driving speed information calculated by the position information signal processor and generates a latest presumed position of the driver as internal position information, and
• the position information signal processor calculates the driving speed information of the driver based on a difference between the position information signal from the sensor and the internal position information generated by the internal position information generator.

A servomechanism, comprising:

• a driver;
• a sensor that outputs a position information signal in accordance with a driving position of a driver;
• a signal processing device that processes the position information signal output from the sensor in accordance with the driving position of the driver and detects a driving speed of the driver;
• and
• a central processing unit that compares the driving speed of the driver detected by the signal processing device with a predetermined target speed given from the outside and controls the driving speed of the driver to achieve the predetermined target speed,
• the signal processing device includes:
• a position information signal processor that processes the position information signal and calculates the driving speed information of the driver;
• and
• an internal position information generator that reflects a latest driving speed information calculated by the position information signal processor and generates a latest presumed position of the driver as internal position information, and
• the position information signal processor calculates the driving speed information of the driver based on a difference between the position information signal from the sensor and the internal position information generated by the internal position information generator.