磁流变阻尼器内部流体动能的能量采集

Harvesting Kinetic Energy of Magnetorheological Fluid Flow within Magnetorheological Fluid Damper

为了构建自供能式磁流变阻尼器内部实时状态监测传感系统,本文介绍了一种针对磁流变阻尼器内部流体能的能量采集装置。该装置被安装于磁流变阻尼器活塞顶端并为检测阻尼器内部工作参数的无线传感模块1供电。根据能量守恒定律,推导出磁流变阻尼器中磁流变液流动能的理论模型。通过实验测试分析了在不同的外界激励下能量采集装置的工作情况,证明了采集的电能随着活塞的运动频率增加而增加,而与磁流变阻尼器的磁流变特性没有明显的关系。测试表明利用此装置能较好的采集到来自于磁流变阻尼器内部流体流动产生的能量,为无线传感模块供电。

A novel energy harvesting device attached to the piston head of the magnetorheological fluid （MRF） damper is designed and fabricated to harvest the kinetic energy of the MRF flow within the MRF damper in order to design internal real time working condition detect sensor system. The device is used to power wireless sensor module which can detect the parameters of working MR damper. A theoretical model is derived to predict the kinetic energy of the MRF flow within the MRF damper. And the efficiency of energy harvesting device is analyzed. An experimental setup is assembled to analyze the work condition of energy harvesting device with different excitation. The test results demonstrate that generated electrical energy increases with the excitation frequency increasing and is not clearly affected by the magnetorheological characters of the MRF damper. And the harvested powers can guarantee the normal operation of wireless sensor module.