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A self-powered AC magnetic sensor based on piezoelectric nanogenerator

机译：基于压电纳米发电机的自供电交流磁传感器

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摘要

An AC magnetic field, which is a carrier of information, is distributed everywhere and is continuous. How to use and detect this field has been an ongoing topic over the past few decades. Conventional magnetic sensors are usually based on the Hall Effect, the fluxgate, a superconductor quantum interface or magnetoelectric or magnetoresistive sensing. Here, a flexible, simple, low-cost and self-powered active piezoelectric nanogenerator (NG) is successfully demonstrated as an AC magnetic field sensor at room temperature. The amplitude and frequency of a magnetic field can both be accurately sensed by the NG. The output voltage of the NG has a good linearity with a measured magnetic field. The detected minute magnetic field is as low as 1.2 × 10~(?7) tesla, which is 400 times greater than a commercial magnetic sensor that uses the Hall Effect. In comparison to the existing technologies, an NG is a roomtemperature self-powered active sensor that is very simple and very cheap for practical applications.
机译：作为信息载体的交流磁场分布在各处并且是连续的。在过去的几十年中，如何使用和检测该领域一直是一个持续的话题。传统的磁传感器通常基于霍尔效应，磁通门，超导体量子接口或磁电或磁阻传感。在这里，成功地展示了一种灵活，简单，低成本且自供电的有源压电纳米发电机（NG）作为室温下的AC磁场传感器。 NG可以准确地感应出磁场的幅度和频率。 NG的输出电压与测得的磁场具有良好的线性关系。检测到的微小磁场低至1.2×10〜（？7）特斯拉，是使用霍尔效应的商用磁传感器的400倍。与现有技术相比，NG是一种室温自供电有源传感器，对于实际应用而言非常简单且非常便宜。

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