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2 kHz High Power Smart Transducer for Acoustic Sub-bottom Profiling Applications 被引量:1
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作者 R. Sathishkumar 《Journal of Marine Science and Application》 2013年第3期361-365,共5页
In this study,a 2kHz Tonpilz projector was designed using a Terfenol-D and modeled in ATILA.For the purpose of modeling studies,it has been determined that a radiating head mass exhibits better transmitting current re... In this study,a 2kHz Tonpilz projector was designed using a Terfenol-D and modeled in ATILA.For the purpose of modeling studies,it has been determined that a radiating head mass exhibits better transmitting current response(TCR) at 136 mm diameter,where the resonance occurs at 2.4kHz and the peak value of 118 dB re 1 μPa/A at 1 m occurs at 12 kHz.Also bolt at a 46mm distance from the center of the head mass offers resonance at 2.4kHz,and the peak value of 115.3 dB re 1 μPa/A at 1m occurs at 11.5kHz.This optimized design is fabricated and molded with polyurethane of 3mm thickness.The prototype was tested at the Acoustic Test Facility(ATF) of National Institute of Ocean Technology(NIOT) for its underwater performances.Based on the result,the fundamental resonance was determined to be 2.18kHz and the peak value of TCR of 182 dB re 1 μPa/A at 1m occurs at 14 kHz.The maximum value of the RS was found to be -190 dB re 1V/μPa at 1m at a frequency of 2.1kHz. 展开更多
关键词 smart transducer MAGNETOSTRICTION acoustic sub-bottom profiling transmitting current response(TCR)
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数据采集卫星系统在智慧城市中的应用 被引量:1
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作者 陈宁宇 刘威扬 张泽根 《卫星应用》 2015年第9期26-31,共6页
目前智慧城市建设的热潮正在世界各地掀起。数字卫星采集系统具有灵敏度高、地域覆盖性广、终端小、用户使用成本低等特点,在智慧城市领域具有巨大的应用潜力。
关键词 数据采集卫星系统 慧城市 感-传-智-用
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uSensing:a Universal Platform to Support Smartphones Accessing Wireless Sensor Networks
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作者 He Nengqiang Jiang Chunxiao +2 位作者 Dong Yuhan Ren Yong Chen Canfeng 《China Communications》 SCIE CSCD 2012年第4期99-109,共11页
This paper presents a universal platform "uSensing" to support smartphones to communicate with sensor nodes in Wireless Sensor Networks (WSNs).Since phones have different CPU processers and operating systems... This paper presents a universal platform "uSensing" to support smartphones to communicate with sensor nodes in Wireless Sensor Networks (WSNs).Since phones have different CPU processers and operating systems,it is a challenge to merge these heterogeneities and develop such a universal platform.In this paper,we design both hardware and software to support the "universal" feature of uSensing:1) "uSD" card:an IEEE 802.15.4 physical communication card with SD interface;2) "uSinkWare":a WSNs middleware running on smartphones.Integrated with uSD card and uSinkWare,phones become mobile data sinks to access into WSNs and parse messages from sensor nodes.We demonstrate the proposed uSensing platform in a commercial smartphone to connect with our WSNs testbed,and validate that the smartphone has the same WSNs functions as commercial fixed sink.Additionally,we evaluate the performance of uSensing platform through measuring phone's CPU load and power consumption,and analyze the performance of these metrics theoretically.The results suggest that the phone-based mobile sink has enough capability to serve as a mobile sink of WSNs and can work up to twenty hours due to low power consumption. 展开更多
关键词 WSNS universal platform SMARTPHONE mobile data sink
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Optical Sensing: the Last Frontier for Enabling Intelligence in Our Wired up World and Beyond
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作者 John CANNING 《Photonic Sensors》 SCIE EI CAS 2012年第3期193-202,共10页
Consigned to the shadows of telecommunications, optical sensing has often taken a back seat in a young person's mind when considering the importance of photonics, or optics, to the advancement of the society and of k... Consigned to the shadows of telecommunications, optical sensing has often taken a back seat in a young person's mind when considering the importance of photonics, or optics, to the advancement of the society and of knowledge. Here, I touch on briefly how broad optical sensing and sensing generally has become and how and why it is becoming the catalyst for the convergence of many technologies and in the process raising significant philosophical questions about the transformation of our society and indeed ourselves. In doing so I touch on many of the complexities in real life that influence the breakthroughs we see today, including a healthy speculation and critique on our society and an awareness of the motivations to improve it that drive many of them. 展开更多
关键词 Optical sensors galactic village global village wireless smartphones science fiction energy medical biodiagnostics education students optical fiber
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