车载传感器压电和电磁混合式自供电技术

研究了一种用于车载传感器自供电的压电和电磁复合式能量收集技术，给出了系统的数学模型，分析了系统共振频率与系统结构参数的关系，设计了一套压电和电磁复合式能量收集装置.实验结果表明，数学模型基本反映了系统的输出特性，在共振频率为18 Hz，加速度为0.5 g时，复合式能量收集装置的最大负载功率为3.75 mW，相比于采用单一电磁技术时的最大负载功率3.2 mW增加了17%.

Vehicle Sensor Self-Powered Technology Research of Electromagnetic and Piezoelectric Hybrid Mode

The piezoelectric and electromagnetic energy harvesting technology for vehicle sensors self-powered was studied. The mathematical models for the composite energy collection system was put for-word, and the relationship about the resonance frequency of the system was analyzed with regard to the system configuration parameters. A piezoelectric and electromagnetic energy harvesting device was de-signed. Experiment shows it has good agreement with the analytical results in trend. The maximum of load power of the composite harvester achieves 3. 75 mW at the resonant frequency of 18 Hz with accelera-tion of 0. 5 g, and is increased by 17% compared with 3. 2 mW of the single electromagnetic technique.