推荐星级:
  • 1
  • 2
  • 3
  • 4
  • 5

基于双光路荧光强度法的水体叶绿素a原位传感器设计

更新时间:2020-11-01 08:30:26 大小:2M 上传用户:gsy幸运查看TA发布的资源 标签:传感器 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

资料介绍

设计了一款基于双光路荧光强度法的叶绿素a原位传感器。使用430nmLED作为系统光源。通过参考光路补偿光源变化对测量结果的影响,提高测量准确度,降低维护成本。使用光电二极管作为探测器测量参考光强度和水体在680nm处的荧光强度。使用锁相放大电路提高传感器的噪声和背景光抑制能力,设计低功耗模式降低传感器的平均功耗。使用不同浓度的叶绿素a溶液测试传感器的性能,测试结果表明传感器在动态范围(0~200μg/L)内的线性度为0.998,测量准确度为±2μg/L,通过与荧光光谱仪进行对比测试传感器的可靠性,测试结果表明两者的相关性为0.94,功耗测试表明传感器的连续工作时间可达5个月以上。

A chlorophyll-a in-situ sensor based on dual-path fluorescence intensity method is presented. A 430 nm LED was used as the light source. To improve the measurement accuracy and reduce the maintenance cost,the influence of the variation of the light source intensity was compensated by the reference path. Photodiodes were used to measure the reference light intensity and the liquid fluorescence intensity at 680 nm. Lock-in amplifier was used to improve the anti-noise ability,and a low-power mode was designed to reduce the power consumption. The performance of the sensor was tested using chlorophyll-a solution with different concentrations. The test results show the linearity of the sensor is 0.998 and the measurement accuracy is ±2 μg/L in the dynamic range(0~200 μg/L). The reliability of the sensor was tested by comparing the sensor with a fluorescence spectrometer,the test results show the correlation between the two instruments is 0.94. The power consumption test shows the continuous working time of the sensor can be more than 5 months.

部分文件列表

文件名 大小
基于双光路荧光强度法的水体叶绿素a原位传感器设计.pdf 2M

【关注B站账户领20积分】

全部评论(0)

暂无评论

上传资源 上传优质资源有赏金

  • 打赏
  • 30日榜单

推荐下载