道路压电微能量采集电路开发及应用效果研究
首发时间:2015-12-31
摘要:针对现有压电能量采集电路用于道路压电微能量采集的不适用性,结合道路压电微能量特性分析了现有电路用于道路压电能量采集存在的技术缺陷,基于标准能量采集电路提出两种改进方案,借助仿真软件系统研究了改进电路在不同电源激励下的能量采集功效,测试并评价了改进电路的实际应用效果。结果表明:道路压电微能量高电压、低电流、不连续瞬时、峰值电压不一致和低频等特性决定现有采集电路难以实现对道路压电微能量的高效采集;仿真结果表明标准能量改进电路可稳定输出5V直流电压,而Buck-Boost电路在复杂荷载条件下难以恒定保持处于最优输出状态;实测结果验证了标准采集电路的不适用性,Buck-Boost电路应用效果难以达到设计预期,而标准采集改进电路持续充电270s可实现稳定的2.2V直流输出,效果最佳。
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Development and study on application effect of energy harvesting circuit on pavement micro piezoelectric energy
Abstract:In light of non applicability of using existing piezoelectric energy acquisition circuit for pavement micro piezoelectric energy, technical defects of existing circuit used in road piezoelectric energy harvesting was analyzed. Based on standard energy acquisition circuit, two improved schemes were proposed. Energy harvesting efficiency of improved circuits with different power supply was studied by using simulation software, and practical application effect was tested and evaluated. Results show that existing piezoelectric energy acquisition circuit can not complete collecting road piezoelectric micro energy efficiently because of its features such as high voltage, low current, discontinuous instantaneous, peak voltage inconformity and low frequency. Simulation results show that improved energy harvesting circuit can export 5V DC voltage stably, the Buck-Boost circuit under complex conditions can not keep staying in optimal state. Experimental results verify the inapplicability of standard acquisition circuit, the application effect of Buck-Boost circuit can not meet design expectations, the effect of improved standard energy harvesting is best, which can export 2.2V DC stably after charging 270 seconds.
Keywords: micro piezoelectric energy power pavement harvesting circuit improved design application
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No.4673354112725814****
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