101學年度：壓電元件及微振盪器作為近接感測器
計畫名稱：壓電元件及微振盪器作為近接感測器
執行起迄：2012/08/01~2014/07/31
總核定金額：1,580,000元
中文摘要：電感型近接感測器的原理，藉由測量導體待測物的表面渦電流，抗拒磁場而使得振盪電路的共振頻率改變。由於石英晶體因具有高品質因素，可作為近接感測器應用。結果發現，石英振盪電路與傳統電感式近接感測器都具金屬感測效應，雖然電感式近接感測器頻率改變程度較多且距離較遠，但石英感測器穩定性較好。對於製作電容-電感積體電路式近接感測器，效果不如預期，推測可能因為製作出的元件發射功率過小，所以量測距離與辨識度較低。另外，石英振盪電路也可作為電磁相容性檢測環境，但以同樣方式顯示電感型振盪器，因互調諧波過小無法以同樣方式獲得結果。實驗石英振盪器的功率向量:直立式石英方向得到均勻發散的功率相位圖。將其功率量化，可得到互調諧波的量化的重疊性，這結果也是電器使用共同空間產生雜訊干擾來源，預期可作為電磁相容性檢測方式之一。
英文摘要：The principle of an inductive proximity sensor is to detect surface eddy current that induces magnetic field to cause resonant frequency shift on oscillation circuit. However, quartz crystal (QC) is more sensitive and more distant than current commercial product in our preliminary study due to its characteristic of high quality factor. The experiments show that inductive proximity sensors have larger level of frequency shift and more effective sensing distance, QC-based proximity sensors is more stable than inductive one. The project also fabricated inductor-capacitance integrated circuit proximity sensors, however, the performance is not as expected probably because emission power is too low to measure. QC-based oscillator is also demonstrated as a platform of electromagnetic compatibility that an inductor-based circuit cannot work as. The intermodulation of two QC oscillators were used to obtain the power emission phase of an QC, which shows an uniform radiation after compensation. Besides, the intermodulation is quantifiable and superimposable. This result is because of the share of a common space, similar to electromagnetic interference by electrical devices. The result probably can provide an alternative approach to examine the electromagnetic compatibility.
執行起迄：2012/08/01~2014/07/31
總核定金額：1,580,000元
中文摘要：電感型近接感測器的原理，藉由測量導體待測物的表面渦電流，抗拒磁場而使得振盪電路的共振頻率改變。由於石英晶體因具有高品質因素，可作為近接感測器應用。結果發現，石英振盪電路與傳統電感式近接感測器都具金屬感測效應，雖然電感式近接感測器頻率改變程度較多且距離較遠，但石英感測器穩定性較好。對於製作電容-電感積體電路式近接感測器，效果不如預期，推測可能因為製作出的元件發射功率過小，所以量測距離與辨識度較低。另外，石英振盪電路也可作為電磁相容性檢測環境，但以同樣方式顯示電感型振盪器，因互調諧波過小無法以同樣方式獲得結果。實驗石英振盪器的功率向量:直立式石英方向得到均勻發散的功率相位圖。將其功率量化，可得到互調諧波的量化的重疊性，這結果也是電器使用共同空間產生雜訊干擾來源，預期可作為電磁相容性檢測方式之一。
英文摘要：The principle of an inductive proximity sensor is to detect surface eddy current that induces magnetic field to cause resonant frequency shift on oscillation circuit. However, quartz crystal (QC) is more sensitive and more distant than current commercial product in our preliminary study due to its characteristic of high quality factor. The experiments show that inductive proximity sensors have larger level of frequency shift and more effective sensing distance, QC-based proximity sensors is more stable than inductive one. The project also fabricated inductor-capacitance integrated circuit proximity sensors, however, the performance is not as expected probably because emission power is too low to measure. QC-based oscillator is also demonstrated as a platform of electromagnetic compatibility that an inductor-based circuit cannot work as. The intermodulation of two QC oscillators were used to obtain the power emission phase of an QC, which shows an uniform radiation after compensation. Besides, the intermodulation is quantifiable and superimposable. This result is because of the share of a common space, similar to electromagnetic interference by electrical devices. The result probably can provide an alternative approach to examine the electromagnetic compatibility.
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