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基于压电效应的MEMS振动式微能源器件 被引量:7
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作者 陈婷婷 关新锋 +2 位作者 杨杰 郭涛 丑修建 《微纳电子技术》 CAS 北大核心 2014年第2期110-114,共5页
设计了一种硅基压电功能材料的四悬臂梁-中心质量块结构MEMS振动式微能源器件,可将环境振动能量有效转化为电能。采用溶胶-凝胶法制备硅基锆钛酸铅(PbZr0.53Ti0.47O3,PZT)压电功能薄膜,经干/湿法刻蚀和溅射沉积等MEMS工艺实现器件功能... 设计了一种硅基压电功能材料的四悬臂梁-中心质量块结构MEMS振动式微能源器件,可将环境振动能量有效转化为电能。采用溶胶-凝胶法制备硅基锆钛酸铅(PbZr0.53Ti0.47O3,PZT)压电功能薄膜,经干/湿法刻蚀和溅射沉积等MEMS工艺实现器件功能结构的制备。研制的器件整体结构尺寸为7 000μm×7 000μm×300μm,单个PZT压电单元面积为0.149 6 mm2。将悬臂梁上4个压电单元串联以实现输出最大化,测试结果表明,器件的谐振频率为300 Hz,适于低频振动环境;输出电压在一定范围内随加速度增加而增大;在加速度为10 g时压电单元单位面积输出电压达1.19 mV/mm2。 展开更多
关键词 微机电系统(MEMS) 振动 压电转换 微能源 输出电压
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一种基于油罐液位测量方法的研究 被引量:3
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作者 温淑慧 《仪器仪表学报》 EI CAS CSCD 北大核心 2001年第z1期320-321,232,共3页
本文介绍了双差压法检测油罐液位的原理和方法 ,消除了密度变化而引起的测量误差 ,提高液位测量的精度 ;有效地解决光纤传输中发射端与接收端的同步问题 ;由于测量电路采用的 CMOS元器件和脉宽 -脉位调制的发射电路是微功耗 ,为光功率... 本文介绍了双差压法检测油罐液位的原理和方法 ,消除了密度变化而引起的测量误差 ,提高液位测量的精度 ;有效地解决光纤传输中发射端与接收端的同步问题 ;由于测量电路采用的 CMOS元器件和脉宽 -脉位调制的发射电路是微功耗 ,为光功率推动提供有利条件。 展开更多
关键词 双差压法 液位测量 微功耗 光功率推动
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Effect of Emulsified Diesel Fuel on Performance and Emissions Characteristics
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作者 Cyizere Confidence Eng Hiram Ndiritu Benson Gathitu 《Energy and Power Engineering》 2019年第9期333-341,共9页
Diesel fuel has been known as the most effective fuel but it is known as a fuel which produces harmful emissions. Later, emulsified diesel fuel was introduced as a better solution but there is no sufficient research d... Diesel fuel has been known as the most effective fuel but it is known as a fuel which produces harmful emissions. Later, emulsified diesel fuel was introduced as a better solution but there is no sufficient research data concerning combustion of emulsified fuel. The present work carried out a simulation of non-surfactant emulsified diesel fuel where composition of water in emulsion varied from 0% to 20% to determine the ratio of water to diesel which is more effective in reducing the exhaust emissions especially NOx. For this simulation,5% of water in diesel without surfactant was able to reduce NOx?up to 35%. It was shown that as the percentage of water increases, the power from that fuel combustion reduces. 展开更多
关键词 EMULSIFIED DIESEL FUEL SURFACTANT Water Content DIESEL FUEL Mi-cro-Explosion Emissions Power
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