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吳松岳
吳松岳
Development of Passive, Wireless Strain Sensor with Novel Inductor Design
應用新型電感於被動式無線應變計的研發
應用新型電感於被動式無線應變計的研發
This study, we present a passive strain sensor which employing LC circuit resonant frequency measuring to measure the strain. Our objective is to enhance the sensitivity.
This study, we present a passive strain sensor which employing LC circuit resonant frequency measuring to measure the strain. Our objective is to enhance the sensitivity.
One of our designs to enhance the sensitivity is embedded solenoidal inductor. It works with a capacitor to become a parallel-connect LC tank circuit. When applying a strain to the embedded solenoidal inductor, not only the length of the inductor changed, but also affected the cross-section area of the inductor due to the possion’s ratio of the embedding material. Then the length and cross-section area made the inductance vary. The embedded solenoidal inductor should work with saw-shaped solenoidal inductor because of the low radial rigidity. The sensitivity of the embedded saw-shaped solenoidal inductor is 121.9kHz/0.01ε measured by Agilent Network Analyzer 4395A.
One of our designs to enhance the sensitivity is embedded solenoidal inductor. It works with a capacitor to become a parallel-connect LC tank circuit. When applying a strain to the embedded solenoidal inductor, not only the length of the inductor changed, but also affected the cross-section area of the inductor due to the possion’s ratio of the embedding material. Then the length and cross-section area made the inductance vary. The embedded solenoidal inductor should work with saw-shaped solenoidal inductor because of the low radial rigidity. The sensitivity of the embedded saw-shaped solenoidal inductor is 121.9kHz/0.01ε measured by Agilent Network Analyzer 4395A.
Another design to enhance the sensitivity is the embedded saw-shaped solenoidal inductor with a thin-film comb capacitor added on. When applying a strain to the embedded solenoidal inductor with a thin-film comb capacitor added on, the length and cross-section area of the inductor and the gap of the thin-film comb capacitor all changed. Which made more changes to the LC resonant frequency then enhancing the sensitivity. With our model, we predict the sensitivity of the embedded saw-shaped solenoidal inductor with a thin-film comb capacitor added on will be 167.6 kHz/0.01ε.
Another design to enhance the sensitivity is the embedded saw-shaped solenoidal inductor with a thin-film comb capacitor added on. When applying a strain to the embedded solenoidal inductor with a thin-film comb capacitor added on, the length and cross-section area of the inductor and the gap of the thin-film comb capacitor all changed. Which made more changes to the LC resonant frequency then enhancing the sensitivity. With our model, we predict the sensitivity of the embedded saw-shaped solenoidal inductor with a thin-film comb capacitor added on will be 167.6 kHz/0.01ε.
[1] S.-Y. Wu and W. Hsu (October 2011). Sensitivity Enhancement of LC Sensors with Novel Inductor Design, The 10th IEEE Conference on Sensors, Limerick, Ireland.
[2] M.-S. Lee, S.-Y. Wu, T.-H. Wong, W. Hsu, T.-K. Chung (October 2012). A Novel Guiding Device for Distal Locking of Intramedullary Nails. The 11th IEEE Conference on Sensors, Taipei, Taiwan.
[2] M.-S. Lee, S.-Y. Wu, T.-H. Wong, W. Hsu, T.-K. Chung (October 2012). A Novel Guiding Device for Distal Locking of Intramedullary Nails. The 11th IEEE Conference on Sensors, Taipei, Taiwan.
[3] S.-Y. Wu and W. Hsu, “Design and characterization of LC strain sensors with novel inductor for sensitivity enhancement.” Smart Materials and Structures 2013, 22, 105015.
[3] S.-Y. Wu and W. Hsu, “Design and characterization of LC strain sensors with novel inductor for sensitivity enhancement.” Smart Materials and Structures 2013, 22, 105015.
[4] S.-Y. Wu, C.-Y. Hung, and W. Hsu (April 2014). A Wireless Micro Thermal Actuator Powered through LC Circuits. The 9th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, Hawaii, U.S.A..
[4] S.-Y. Wu, C.-Y. Hung, and W. Hsu (April 2014). A Wireless Micro Thermal Actuator Powered through LC Circuits. The 9th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, Hawaii, U.S.A..
[5] S.-Y. Wu, C.-Y. Hung, Y.-C. Shieh, and W. Hsu (April 2014). Wireless Shock Recording through The Integration of LC Circuits and Micro Mechanical-latch Switch. The 9th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, Hawaii, U.S.A..
[5] S.-Y. Wu, C.-Y. Hung, Y.-C. Shieh, and W. Hsu (April 2014). Wireless Shock Recording through The Integration of LC Circuits and Micro Mechanical-latch Switch. The 9th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, Hawaii, U.S.A..
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