海水营养盐微弱信号检测技术研究

doi:10.3976/j.issn.1002-4026.2019.06.002

Shandong Science ›› 2019, Vol. 32 ›› Issue (6): 9-14.doi: 10.3976/j.issn.1002-4026.2019.06.002

• Oceanographic Science, Technology and Equipment • Previous Articles Next Articles

Weak signal detection technology of seawater nutrient salt

LIU Jie, LIU Yan, CAO Xuan, MA Ran, ZHANG Shu-wei, GUO Cui-lian

Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology，Institute of Oceanographic Instrumentation,
Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266001,China

Received:2019-07-05 Published:2019-12-20 Online:2019-12-06

Abstract

Abstract: In this study, we investigated the weak signal detection technology of seawater nutrient salt based on the principle of photoelectric detection and phase-locked amplification technology. In hardware, the weak voltage signal of the photoelectric diode was preamplified to filter the noise using the analog phase-locked amplifier circuit. Based on the STM32F401 hardware platform, the improvement of the variable step size least mean square adaptive filtering algorithm was used in software to filter the noise. Then, the weak voltage signal of the seawater nutrients was accurately detected. Long-term simulation and experimental data denote that the weak signal detection scheme of the seawater nutrients proposed in this study is considerable significance to improve the data accuracy of the nutrient sensor.

Key words: nutrient salt, photoelectric detection, STM32F401, weak signal detection, analog phase-locked amplification, variable step size least mean square adaptive filtering algorithm

CLC Number:

TP391.8

LIU Jie, LIU Yan, CAO Xuan, MA Ran, ZHANG Shu-wei, GUO Cui-lian. Weak signal detection technology of seawater nutrient salt[J].Shandong Science, 2019, 32(6): 9-14.

References 10

1	肖靖泽, 赵萍, 魏月仙,等. 五参数全自动营养盐分析仪的研制与应用[J].现代科学仪器,2011（1）:63-65.
2	马然,曹煊,刘岩,等. 基于微流控技术的营养盐原位分析方法的研究[J].传感技术学报,2016,29(11):1659-1665. doi: 10.3969/j.issn.1004-1699.2016.11.006.
3	方永佳. 基于STM32和Speex编解码的录音设计与实现[J].工业控制计算机,2016,29(4):115-116. doi: 10.3969/j.issn.1001-182X.2016.04.052.
4	蒋韬,刘文波. 基于μC/OS-Ⅱ的便携式飞行参数数据卸载器[J].电子科技,2012,25(6):41-43. doi: 10.3969/j.issn.1007-7820.2012.06.013.
5	王远, 周怡妃,王小龙,等. 压电传感器信号调理及输出芯片设计[J].传感器与微系统,2017,36(11):99-102. doi: 10.13873/J.1000-9787(2017)11-0099-04.
6	吴丽萍,曹伟超. 基于AD797便携式耳机功率放大系统的设计[J]. 集成电路应用,2015(10):33. doi: 10.3969/j.issn.1674-2583.2015.10.008.
7	冯晨,秦工,詹昊思,等. 互相关检测法在微弱信号检测中的应用[J].电子测试,2016(17):65-66. doi: 10.16520/j.cnki.1000-8519.2016.17.030.
8	户保坤. 基于DSP的通用雷达信号处理机设计与实现[D]. 西安：西安电子科技大学，2017.
9	XIA W, WANG Y Y. A variable step-size diffusion LMS algorithm over networks with noisy links[J]. Signal Processing.2018,148:205-213. doi: 10.1016/j.sigpro.2018.02.012.
10	郭翠莲,程永强,褚东志,等. 海水五参数原位营养盐分析仪的研制[J].山东科学，2018,31(2):1-8. doi: 10.3976/j.issn.1002-4026.2018.02.001.

Metrics

Comments

Recommended 0

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits third parties to freely share (i.e., copy and redistribute the material in any medium or format) and adapt (i.e., remix, transform, or build upon the material) the articles published in this journal, provided that appropriate credit is given, a link to the license is provided, and any changes made are indicated. The material may not be used for commercial purposes. For details of the CC BY-NC 4.0 license, please visit: https://creativecommons.org/licenses/by-nc/4.0

[1]	WU Bing-wei, ZHANG Ying-ying, ZHANG Yun-yan, FENG Xian-dong, YUAN Da. A dissolved oxygen detection technique based on an oxygen sensitive membrane in seawater [J]. Shandong Science, 2019, 32(5): 31-37.
[2]	ZHANG Xiao-nan,CHEN Jie, GAO Hao, CAI Yu-long, LIU Jie, LI Zheng-bao. Research on extremum detection and filtering algorithm of weak light signal [J]. SHANDONG SCIENCE, 2018, 31(1): 1-.
[3]	CHU Dong-zhi，ZHANG Shu-wei， ZHANG Tian-peng，WANG Xiao-hong， CAO Xuan，MA Ran. Design of online automatic filtration system for the in-situ nutrient salt sensor [J]. SHANDONG SCIENCE, 2017, 30(5): 8-13.
[4]	CHENG Yan, MA Ran, WANG Hong-liang, CAO Xuan, CAO Lu. Design of VC＋＋ based seawater nutrient salt test software system [J]. SHANDONG SCIENCE, 2014, 27(5): 88-92.
[5]	ZHANG Ke-Ke, YAN Xing-Kuai, CHEN Shi-Zhe, LIU Shi-Xuan, QI Yong. Design of insitu chlorophyll-a sensor by fluorescence method [J]. J4, 2013, 26(3): 37-40.

Weak signal detection technology of seawater nutrient salt

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

References 10

Related Articles 5

Metrics

Comments

Recommended 0