| 摘要 |
PURPOSE:To miniaturize a temperature measuring element and to make low the consumption of electric power, by using a crystal vibrator cut out a rotating angle alpha around a mechanical angle and a rotating angle beta around an optical axis rotated by the angle alpha in a specific range as the temperature measuring element. CONSTITUTION:A rotating angle alpha around amechanical axis is taken in the range of 40 deg.<alpha<140 deg. and a rotating angle beta around an optical axis is taken in the range of 40 deg.<beta<140 deg. and then, cutting of a vibrator 1 is also satisfied with this condition. Resonance frequency itself of the vibrator has not a primary temperature characteristic, but it is linearized easily by using a microprocessor etc. Resolution is raised because of being capable of using a maximum temperature coefficient of a crystal or the value in the neighborhood of it. Also, a cutting angle is selected so that the temperature coefficient is not affected too much even if discrepancy of the cutting angle is produced more or less. Moreover, miniaturization of a temperature measuring element part and making low electric power consumption, are attained because of not using thickness slip vibration. |
