Calibration device, suspension system, saddle-type vehicle, and calibration method

A calibration device comprising:

• a first coefficient calculation unit configured to calculate a first coefficient representing a relationship between a difference between a maximum output value and a minimum output value, and the minimum output value, according to a predetermined condition by using an inductance of a detector which detects an extension/contraction amount of a suspension device and a capacitance of a capacitor provided in a control device to which an output value of the detector is input, the maximum output value being an output value of the detector when the suspension device has a maximum extension/contraction amount, the minimum output value being an output value of the detector when the suspension device has a minimum extension/contraction amount;
• a first output unit configured to obtain a first output value by multiplying the first coefficient by a shortest output value specified to satisfy a predetermined condition by using the output value of the detector when the suspension device has the minimum extension/contraction amount;
• an ideal value calculation unit configured to calculate an ideal value of the output value of the detector when the extension/contraction amount of the suspension device is a first extension/contraction amount by using the first extension/contraction amount, an operation amount which is a difference between the maximum extension/contraction amount and the minimum extension/contraction amount of the suspension device, the shortest output value, and the first output value, the first extension/contraction amount being an extension/contraction amount of the suspension device in a state where a wheel connected to the suspension device is not grounded;
• a second coefficient calculation unit configured to calculate a second coefficient by dividing a second output value by the ideal value, the second output value being an actual output value of the detector when the extension/contraction amount of the suspension device is the first extension/contraction amount;
• and
• a calibration unit configured to calculate a calibration value which is an output value after calibration of the detector when the suspension device has the minimum extension/contraction amount, by using the second output value, the first extension/contraction amount, the operation amount, the first output value, and the second coefficient.