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第二届亚洲机械电子学学术会议

作者： LIU Xiaowei ZHANG Haifeng LI Guangming CHEN Weiping WANG Xilian (MEMS Center,Harbin Institute of Technology,Harbin 150001,China)

This paper describes a closed-loop micro-machined accelerometer implemented in a bulk-micromachining technology with integrated CMOS *** operation and structure of accelerometer are detailed. This circuit is simulated using Hspice and shows good sensitivity and low power *** fundamental electronic noise for acceleration sensing is *** sensor is designed to measure ±5g *** sensitivity is larger than 15mV/g.

关键词： Accelerometer capacitive sensing CMOS Interface circuit

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Fabric-substrated capacitive biopotential sensors enhanced by dielectric nanoparticles

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Nano Research 2021年第9期14卷 3248-3252页

作者： Xiangjun Chen Xiaoxiang Gao Akihiro Nomoto Keren Shi Muyang Lin Hongjie Hu Yue Gu Yangzhi Zhu Zhuohong Wu Xue Chen Xinyu Wang Baiyan Qi Sai Zhou Hong Ding Sheng Xu Materials Science and Engineering Program University of California San DiegoLa JollaCA 92093USA Department of NanoEngineering University of California San DiegoLa JollaCA 92093USA Department of Electrical and Computer Engineering University of California San DiegoLa JollaCA 92093USA Department of Bioengineering University of California San DiegoLa JollaCA 92093USA

Wearable biopotential sensing devices are essential to long-term and real-time monitoring of human ***-contact,capacitive sensing electrodes prevent potential skin iritations,and are thus beneficial for long-term *** capacitive electrodes are either connected to a separate control circuit via external wires or have limited sensing capacitances,which leads to low signal *** study demonstrates a stretchable capacitive sensing device with integrated electrodes and control electronics,with enhanced signal *** electrodes and the control electronics are fabricated on a common fabric substrate for breathability and strain-limiting *** stretchable electrodes are based on an island-bridge design with a stretchability as high as-100%,and an area ratio as high as-80%.By using a dielectric calcium copper titanate(CCTO)composite as the adhesive layer,the electrode capacitance can be increased,yielding an enhanced signal-to-noise ratio(SNR)in the acquired *** device offers a convenient and comfortable approach for long-term non-contact monitoring of biopotential signals.

关键词： capacitive sensing biopotential stretchable calcium copper titanate(CCTO) signal-to-noise ratio(SNR)

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A portable and low-cost parallel-plate capacitor sensor for alkali and heavy metal ions detection

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Journal of Advanced Dielectrics 2018年第4期8卷 28-34页

作者： Septia Kholimatussadiah Tri Anggono Prijo Department of Physics Faculty of Science and Technology Universitas AirlanggaSurabayaIndonesia

A portable and low-cost design of parallel-plate capacitor sensor is proposed and investigated for detection of heavy and alkali metal ions concentration in liquid *** application of a thin and long-sided parallel PCB plate allows one to measure the dielectric response of each sample through capacitive sensing *** measurements were based on the peak output voltage corresponding to the capacitance of the output measured by an oscilloscope with metal ions concentration of the solution varying from 0 to 10 ppm and input frequency ranging from 1 kHz to 10 *** ICF of Li,Na and K in chloride solution was 2.4,2.1 and 1.9 MHz,*** ICF of Na and K in hydroxide solution was 1.5 MHz and 1.1 MHz,respectively,while the ICF of Pb(NO_(3))_(2)was 490 *** detected ICF was applied to further construct the portable sensor system,which is simple in design,low-cost in fabrication and easy to *** finding of ICF of each chemical element is necessary to solve the selectivity challenge of the capacitance-based sensor,which will be appropriate for chemical,environmental and engineering applications.

关键词： capacitive sensing capacitor sensor characteristic frequency metal ions detection parallel-plate capacitor.

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