Rotation detection device, rotation detection method, and rotation detection program

A rotation detection method comprising:

• generating, in a first comparator, a first digital signal that indicates a magnitude relationship between a first voltage, which is output from a potentiometer in accordance with an amount of rotation of a rotating body, and a threshold voltage;
• generating, in a second comparator, a second digital signal that indicates a magnitude relationship between a second voltage, which is obtained by dividing the first voltage, and the threshold voltage;
• and
• detecting, in a controller, a direction of rotation and a number of complete turns of the rotating body, based on transition edges of the first digital signal and transition edges of the second digital signal.

A non-transitory computer-readable recording medium storing a rotation detection program that, when executed on a computer, causes the computer to:

• acquire a first digital signal, generated by a first comparator and indicating a magnitude relationship between a first voltage, which is output from a potentiometer in accordance with an amount of rotation of a rotating body, and a threshold voltage;
• acquire a second digital signal, generated by a second comparator and indicating a magnitude relationship between a second voltage, which is obtained by dividing the first voltage, and the threshold voltage;
• and
• detect a direction of rotation and a number of complete turns of the rotating body based on transition edges of the first digital signal and transition edges of the second digital signal.