摘要
本研究是設計一應用於陀螺儀之驅動感測電路。驅動電路模組採用自激驅動方式，利用陀螺儀本身諧振特性配合反饋電路，使陀螺儀於固有共振頻率下產生自激振盪，並加入自動增益控制電路以穩定驅動信號之振幅，提高陀螺儀感測精度，同時為感測電路模組提供穩定之同步信號。而感測電路模組利用差動放大電路將感測電壓信號中無效之驅動電壓成份抑除，放大感測信號。並利用同步解調電路將同步信號與陀螺儀感測輸出信號進行同步解調，得到相對應於角速度之電壓信號。最後對電路模組的性能和測試結果進行探討，並將陀螺儀與電路整合，於旋轉實驗進行測試，得到轉速與感測電壓擁有良好的線性關係。
並列摘要
In this thesis, designing a driving and sensing circuitry for gyroscope is the primary goal. Self-excited mode is used for designing the driving circuit. The operating frequency is assigned based on the desired resonant frequency of the gyroscope. In association with the feedback circuit, the gyroscope is able to generate appropriate oscillation. Auto gain control circuit is also included to stabilize the amplitude of the driving signal in order to increase its accuracy and provide a steady synchronous signal for the sensing circuitry. Differential amplifier circuit is used to remove the invalid driving signal involved in the sensing signal and then to amplify such clean signal. Synchronous demodulation circuit is also employed to carry out demodulation of the synchronous signal with the sensing signal, thus the voltage signal with respect to the rotation rate is finally obtained. Functioning test is completed in experiment to show its performance of a good resolution and a linear relationship between the rotation speed and the sensing voltage.
參考文獻
延伸閱讀
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