分析了高压电场能量收集的原理，建立静电场耦合分布电容模型，并通过实验证明了模型的参考价值。随后，分析使用整流桥电路进行能量管理时的最佳功率点，并从增大超级电容充电电流的角度，设计了一种新型的管理电路，即同步电荷提取电路，以获得最佳的能量存储能力。结果证明存在一个最佳占空比使得收集的能量最大化，从而缩短无线节点在线监测工作周期。%The theory of energy harvested from the high voltage is analyzed, and then the corresponding model of coupling capacitance derived from static electric field is built, and several experiments are conducted to study whether the model is valuable. Then, according to what the result reveals, the optimal power point is found out when energy is managed by rectifier circuit. The value of charged current to super capacitor is used as the judge-ment whether the circuit system has the best storage performance. In that respect, management circuit is improved as a technology called Synchronous Electric Charge Extract, because the rectifier circuit can’ t perform as good as it is under ultrahigh voltage. It turns out that there is an optimal duty to maximize the energy harvested, so that the energy harvester can scavenge much more energy to cancellout the power loss. As a result, online monitoring period could be shortened greatly.
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