Mode shape visualization system for high-stability quartz resonators in high and continuously changing temperature

The principal application of mode visualization is to the identification of unwanted weak-vibration modes that degrade the fundamental mode. Temperature variation measurement in the high temperature range is also required because the spurious modes generally have a large first-order temperature coefficient compared with their fundamental mode. Vibration patterns are obtained as reciprocals of the correlation coefficients between the images of the resting and driving states. This system was improved so that the frequency synthesizer's output frequency automatically traces out the resonant frequency of the device under test even when the ambient temperature is changed. The developed system, which provides high data acquisition rates compared to mechanical scanning, can be applied for measurements under continuous temperature changes.

Duke Scholars

Author Yuichiro Yano Family Medicine and Community Health