TY - GEN
T1 - Theoretical and Experimental Study of z-axis Acceleration Detection of the Micro Thermal Convective Accelerometer
AU - Wang, Xiaoyi
AU - Xu, Wei
AU - Luo, Huahuang
AU - Zhao, Xu
AU - Lee, Yi Kuen
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - For the first time, we conduct theoretical and experimental analysis on the z-axis (out-of-plane direction) acceleration detection of the micro thermal convective accelerometer (MTCA). Instead of using the complex assembling method to make an out-of-plane detection structure, an indirect way to measure the z-axis acceleration is proposed. The mechanism is proposed with the evidence that the sum of the upstream and downstream detectors' temperature keeps the same under in-plane acceleration, while their differential output keeps constant with the out-of-plane (z-axis) acceleration. By means of monitoring the variation of temperature of in-plane detectors under out-of-plane acceleration, the z-axis acceleration could be indirectly sensed. Theoretically, the coupling error on z-axis induced by x-axis is quite small (less than 1%). Through this method, it could be easy to convert a single-axis (X) MTCA to a two-axis (X-Z) MTCA, which is also promising to improve the two-axis (X-Y) MTCA to a tri-axis (X-Y-Z) accelerometer. In addition, an MTCA is fabricated based on a CMOS compatible fabrication method and demonstrate the proposed detection mechanism with high sensitivity for both x-axis (1211μV/g) and z-axis (402μV/g).
AB - For the first time, we conduct theoretical and experimental analysis on the z-axis (out-of-plane direction) acceleration detection of the micro thermal convective accelerometer (MTCA). Instead of using the complex assembling method to make an out-of-plane detection structure, an indirect way to measure the z-axis acceleration is proposed. The mechanism is proposed with the evidence that the sum of the upstream and downstream detectors' temperature keeps the same under in-plane acceleration, while their differential output keeps constant with the out-of-plane (z-axis) acceleration. By means of monitoring the variation of temperature of in-plane detectors under out-of-plane acceleration, the z-axis acceleration could be indirectly sensed. Theoretically, the coupling error on z-axis induced by x-axis is quite small (less than 1%). Through this method, it could be easy to convert a single-axis (X) MTCA to a two-axis (X-Z) MTCA, which is also promising to improve the two-axis (X-Y) MTCA to a tri-axis (X-Y-Z) accelerometer. In addition, an MTCA is fabricated based on a CMOS compatible fabrication method and demonstrate the proposed detection mechanism with high sensitivity for both x-axis (1211μV/g) and z-axis (402μV/g).
KW - Micro thermal convective accelerometer
KW - coupling effect
KW - theoretical model
KW - z-axis acceleration detection
UR - http://www.scopus.com/inward/record.url?scp=85078700412&partnerID=8YFLogxK
U2 - 10.1109/SENSORS43011.2019.8956737
DO - 10.1109/SENSORS43011.2019.8956737
M3 - Conference contribution
AN - SCOPUS:85078700412
T3 - Proceedings of IEEE Sensors
BT - 2019 IEEE Sensors, SENSORS 2019 - Conference Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 18th IEEE Sensors, SENSORS 2019
Y2 - 27 October 2019 through 30 October 2019
ER -