Harvesting energy from the oscillation of aquatic animals: testing a vibration-powered generator for bio-logging data logger systems
Harvesting energy from the oscillation of aquatic animals: testing a vibration-powered generator for bio-logging data logger systems
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DOI：
10.14928/amstec.20.1-2_37
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Noda;J. Okuyama;Yuuki Kawabata;H. Mitamura;N. Arai
中科院分区：
文献类型：
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作者：
T. Noda;J. Okuyama;Yuuki Kawabata;H. Mitamura;N. Arai
电池一直是使用动物携带的微型数据记录器监测水生动物长期运动和行为的限制因素之一。为了克服生物记录系统中能量固定的局限性，研制了一种利用振动发电机的数据记录系统样机，并探讨了利用水生动物的振动能量作为外部电源的可行性。该系统由振动发电机和数据记录器部分组成，其中包含3轴加速度、压力和温度传感器，这些传感器通过5 m抗弯曲电缆连接。当数据记录器部分的电容器充入足够的电压（5 V）时，系统可以交替启动传感器测量和写入存储器。将发电机连接到鱼的脚上，同时另一个小型数据记录器测量反射到发电机的尾鳍运动的加速度，然后将鱼释放到水箱中。当鱼在实验槽中主动游动时（稳定游动中尾鳍运动的一般频率和幅度分别为：1.76 Hz和0.32 g），由于电容器中没有充入足够的电，因此不可能启动传感器测量。然而，在实验前手动充电至4V的电容器中的电压在来自鱼实验的数据中比来自没有振动动力发电机的对照实验的数据下降得更慢。这表明，当电容器中的放电速率大于充电速率时，成功地从鱼运动中产生电力。虽然这项研究不能解决围绕振动发电机效率的技术问题，但它表明了从水生动物的振荡中获取能量的可能性。
Battery has been one of the constraints for monitoring longer-term movement and behavior of aquatic animals using an animal-borne micro data logger. To overcome the limitation of the fixed energy in bio-logging systems, a prototype of data logger system using a vibrationpowered generator was developed, and the feasibility of utilizing the oscillation energy of aquatic animals as external sources of the power was investigated. The system was composed of a vibration-powered generator and data logger part incorporating 3-axis acceleration, pressure, and temperature sensors, and these were connected via a 5 m bending resistance cable. The system can initiate sensor measurements and writing to the memory alternately when enough voltage (5 V) is charged in a capacitor in the data logger part. The generator was attached to the peduncle of the fish simultaneously with another small data logger measuring the acceleration of caudal fin movement reflected to the generator, and then the fish was released in a tank. While the fish actively swam in the experimental tank (general frequency and amplitude of the caudal fin movement in steady swimming: 1.76 Hz and 0.32 g, respectively), it was impossible to initiate the sensor measurements because there was not enough electricity charged in the capacitor. However, the voltage in the capacitor, which was manually charged to 4 V before the experiment, decreased more slowly in the data from the fish experiment than the data from the control experiment without the vibration-powered generator. This suggested that it was succeeded in producing the electricity from the fish movement while the electricity discharge rate in the capacitor was larger than the charging rate. Although this study cannot solve the technological issues around the efficiency in the vibration-powered generator, it showed the possibility of harvesting energy from the aquatic animal’s oscillation.