Global S&T Development Trend Analysis Platform of Resources and Environment
Self-Powered Alarm Fights Forest Fires, Monitors Environment | |
admin | |
2020-06-24 | |
发布年 | 2020 |
语种 | 英语 |
国家 | 美国 |
领域 | 气候变化 |
正文(英文) | Smokey the Bear says that only you can prevent wildfires, but what if Smokey had a high-tech backup? In a new study, a team of Michigan State University scientists designed and fabricated a remote forest fire detection and alarm system powered by nothing but the movement of the trees in the wind. As detailed in the journal Advanced Functional Materials, the device, known as MC-TENG -- short for multilayered cylindrical triboelectric nanogenerator (TENG) -- generates electrical power by harvesting energy from the sporadic movement of the tree branches from which it hangs. "As far as we know, this is the first demonstration of such a novel MC-TENG as a forest fire detection system," said lead author Changyong Cao, who directs the Laboratory of Soft Machines and Electronics in MSU's School of Packaging and is an assistant professor in the Packaging School and Departments of Mechanical Engineering, and Electrical and Computer Engineering. "The self-powered sensing system could continuously monitor the fire and environmental conditions without requiring maintenance after deployment," he said. For Cao and his team, the tragic forest fires in recent years across the American West, Brazil and Australia were driving forces behind this new technology. Cao believes that early and quick response to forest fires will make the task of extinguishing them easier, significantly reducing the damage and loss of property and life. Traditional forest fire detection methods include satellite monitoring, ground patrols, watch towers, among others, which have high labor and financial costs in return for low efficiency. Current remote sensor technologies are becoming more common, but primarily rely on battery technology for power. "Although solar cells have been widely used for portable electronics or self-powered systems, it is challenging to install these in a forest because of the shading or covering of lush foliage," said Yaokun Pang, co-author and postdoc associate at Cao's lab. TENG technology converts external mechanical energy -- such as the movement of a tree branch -- into electricity by way of the triboelectric effect, a phenomenon where certain materials become electrically charged after they separate from a second material with which they were previously in contact. The simplest version of the TENG device consists of two cylindrical sleeves of unique material that fit within one another. The core sleeve is anchored from above while the bottom sleeve is free to slide up and down and move side to side, constrained only by an elastic connective band or spring. As the two sleeves move out of sync, the intermittent loss of contact generates electricity. The MC-TENG are equipped with several hierarchical triboelectric layers, increasing the electrical output. The MC-TENG stores its sporadically generated electrical current in a carbon-nanotube-based micro supercapacitor. The researchers selected this technology for its rapid charge and discharge times, allowing the device to adequately charge with only short but sustained gusts of wind. "At a very low vibration frequency, the MC-TENG can efficiently generate electricity to charge the attached supercapacitor in less than three minutes," Cao said. The researchers outfitted the initial prototype with both carbon monoxide (CO) and temperature sensors. The addition of a temperature sensor was intended to reduce the likelihood of a false positive carbon dioxide reading.
make a difference: sponsored opportunity
Story Source: Materials provided by Michigan State University. Note: Content may be edited for style and length. Journal Reference:
Cite This Page: Michigan State University. "Self-powered alarm fights forest fires, monitors environment." ScienceDaily. ScienceDaily, 24 June 2020.
Michigan State University. (2020, June 24). Self-powered alarm fights forest fires, monitors environment. ScienceDaily. Retrieved June 25, 2020 from www.sciencedaily.com/releases/2020/06/200624151532.htm
Michigan State University. "Self-powered alarm fights forest fires, monitors environment." ScienceDaily. www.sciencedaily.com/releases/2020/06/200624151532.htm (accessed June 25, 2020).
|
URL | 查看原文 |
来源平台 | Science Daily |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/277503 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | admin. Self-Powered Alarm Fights Forest Fires, Monitors Environment. 2020. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[admin]的文章 |
百度学术 |
百度学术中相似的文章 |
[admin]的文章 |
必应学术 |
必应学术中相似的文章 |
[admin]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论