亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Reproducibly reversible fiber loop ringdown water sensor embedded in concrete and grout for water monitoring

薄泥浆 循环(图论) 纤维 材料科学 环境科学 复合材料 数学 组合数学
作者
Malik Kaya,Peeyush Sahay,Chuji Wang
出处
期刊:Sensors and Actuators B-chemical [Elsevier BV]
卷期号:176: 803-810 被引量:22
标识
DOI:10.1016/j.snb.2012.10.036
摘要

Abstract A novel fiber optic water sensor based on the evanescent field-fiber loop ringdown (EF-FLRD) technique is described. After removal of the plastic jacket of a section of single mode fiber, followed by chemical etching of the fiber cladding partially, this section of bare fiber (sensor head) was placed inside a concrete mixture. Presence of water in the concrete changes the optical refractive index of the medium that is the interface between the bare etched fiber surface and the concrete, and a change in ringdown time is recorded due to a change in EF scattering loss occurred in the sensor head. Continuous monitoring of ringdown time, the water sensors read diligent data about variations of the water inside the concrete after tens of ml water is poured on the surface of a concrete bar. Eight EF-FLRD water sensor units were constructed and the sensors were embedded in different concrete bars to detect presence of water inside the concrete. The EF-FLRD water sensors show instant response. The demonstrated detection sensitivity is 10 ml water when it is poured to the surface of a concrete bar with approximate dimensions of 30 cm × 5 cm × 5 cm and the signal-to-noise ratio is 86, corresponding to a detection sensitivity limit of 0.12 ml. In addition to fast response, high sensitivity, additional unique advantage of the EF-FLRD water sensor over its counterparts, such as polymer-coated FBG water sensors, is high reversibility. The EF-FLRD water sensors embedded in concrete demonstrate to be highly reversible when tested in water–dry–water–dry duty cycles for as long as 43 h. Free of using temperature sensitive optical components in the sensor head, the EF-FLRD water sensor is immune to temperature variations in the concrete. This new type of fiber optic water sensor will have broad applications in long-term monitoring of presence/absence of water inside concrete as well as in concrete property characterization.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
18秒前
情怀应助科研通管家采纳,获得10
33秒前
1分钟前
Dc发布了新的文献求助10
1分钟前
Dc完成签到,获得积分10
1分钟前
1分钟前
幽默平安发布了新的文献求助10
1分钟前
科研通AI2S应助科研通管家采纳,获得10
2分钟前
3分钟前
3分钟前
3分钟前
小禾一定行完成签到 ,获得积分10
3分钟前
inkoin发布了新的文献求助10
3分钟前
科研通AI2S应助科研通管家采纳,获得10
4分钟前
inkoin完成签到,获得积分10
4分钟前
4分钟前
积极的台灯应助Akitten采纳,获得10
5分钟前
隐形曼青应助务实书包采纳,获得10
5分钟前
5分钟前
5分钟前
爱思考的小笨笨完成签到,获得积分10
6分钟前
GingerF应助科研通管家采纳,获得50
6分钟前
GingerF应助科研通管家采纳,获得50
6分钟前
上官若男应助闫雪采纳,获得10
6分钟前
6分钟前
6分钟前
Akitten发布了新的文献求助10
7分钟前
7分钟前
大写的LV完成签到 ,获得积分10
7分钟前
ffff完成签到 ,获得积分10
7分钟前
zsmj23完成签到 ,获得积分0
8分钟前
Owen应助科研通管家采纳,获得10
8分钟前
Owen应助hongtao采纳,获得10
8分钟前
8分钟前
哈哈哈完成签到 ,获得积分10
8分钟前
9分钟前
liu完成签到 ,获得积分10
10分钟前
33发布了新的文献求助10
10分钟前
10分钟前
阿金啊发布了新的文献求助10
10分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3990219
求助须知:如何正确求助?哪些是违规求助? 3532146
关于积分的说明 11256472
捐赠科研通 3271042
什么是DOI,文献DOI怎么找? 1805190
邀请新用户注册赠送积分活动 882302
科研通“疑难数据库(出版商)”最低求助积分说明 809234