Differential resonator type surface acoustic wave sensor calibrating method for motor cycle, involves determining corrected value by considering shifting of sensor frequency or shifting of difference between values, with respect to function

摘要

The method involves establishing an average calibration function relating resonance frequency difference (deltaf) and physical magnitude e.g. temperature (T), of a differential resonator type surface acoustic wave sensor. The frequency difference is determined when the magnitude corresponds to a predetermined value. Shifting of frequency of the sensor or shifting of difference between a value obtained by the sensor and the predetermined value, with respect to the function, is determined. A corrected value to be obtained by the sensor is determined, by considering the shifting of the sensor.