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Your search keyword '"Chu, Zhaozhi"' showing total 20 results
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20 results on '"Chu, Zhaozhi"'

12. MEMS-based electric field sensor with environmental adaptability consideration and its application in the near-ground atmosphere

Author

Wen Xiaolong, Pengfei Yang, Chu Zhaozhi, Wu Shuang, Chunrong Peng, and Liu Yutao

Subjects
Microelectromechanical systems, Atmosphere, History, business.industry, media_common.quotation_subject, Electric field sensor, Environmental science, Aerospace engineering, business, Adaptability, Computer Science Applications, Education, media_common
Abstract

The near-ground electric field (E-field) is an important parameter needed to be measured for lightning warning systems. Yet, most of the E-field sensors are based on bulky and expensive rotate-vane mills. This paper presents a novel MEMS(Micro-electro-mechanical Systems)-based sensor and its application in near-ground atmospheric E-field long-term monitoring. We solve the problem of environmental adaptability by means of a novel macromolecular polymer package and moisture-proof design. To enhance the electric field resolution, a Φ 36mm×17mm probe is mounted separately from the signal processing circuit. Both finite element simulation and experimental results prove that this sensor could detect the electric field as small as 5V/m. The real-time monitoring data have a good consistency with those of the commercial electric field mill.

Published
2021

13. Toward Atmospheric Electricity Research: A Low-Cost, Highly Sensitive and Robust Balloon-Borne Electric Field Sounding Sensor.

Author

Wen, Xiaolong, Yang, Pengfei, Chu, Zhaozhi, Peng, Chunrong, Liu, Yutao, and Wu, Shuang

Abstract

High-altitude electric fields are a critical parameter of electricity in the atmosphere. Due to such drawbacks as their bulk and high cost, traditional electric field mills are not available for daily atmospheric sounding purposes. This paper introduces a highly sensitive and robust electric field sounding sensor based on an existent micro-electro-mechanical systems chip and a new protective package that augments sensor sensitivity. To gain high sensitivity, an innovative external metal electrode connects to the electric field microchip’s package cap, hangs down out of the guardian foam, and effectively enhances the local electric field near the microchip due to the distortion effect. This distortion regularity was studied during a series of finite element simulations, calibrations, and comparison experiments. With a 1.5-meter-long external electrode, the sensitivity of the sensor reached 465 mV/kV/m with a resolution that was better than 10 V/m in an actual long-term ground comparison test. Furthermore, the microsensor chip and its circuit are protected inside a foam while the metal electrode is exposed outside, therefore gaining a robust stability during harsh environments such as low temperature, rainfall, etc. To examine the performances, we built an electric field sounding system, including the electric field sensor, a radiosonde, and a receiving antenna, and measured high-altitude electric fields in various weather conditions. Intended for atmospheric electricity research, our innovative electric field sounding sensor would be especially propitious if integrated with a radiosonde and applicable to daily sounding services. [ABSTRACT FROM AUTHOR]

Published
2021
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