Development of an expendable current profiler based on modulation and demodulation

IF 1.8 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Geoscientific Instrumentation Methods and Data Systems Pub Date : 2023-04-14 DOI:10.5194/gi-12-57-2023

Keyu Zhou, Qisheng Zhang, Guan-Jhu Chen, Zucan Lin, Yunliang Liu, Pengyu Li

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引用次数: 0

Abstract

Abstract. We designed a low-cost expandable current profiler (XCP) including software and hardware. An XCP is an observation instrument that rapidly measures currents based on the principle that currents cut the geomagnetic field to induce electric fields. The cost of an XCP must be reduced because it is a single-use device. The digitization of the previously developed XCP is carried out underwater, which requires the probe to contain not only analogue circuits for acquiring signals but also digital circuits and digital chips, which are relatively expensive. In this study, an XCP was developed that adopts signal modulation and demodulation to transmit analogue signals on an enamelled wire, and the signal digitization occurs above the surface of the water. The cost of the instrument was effectively reduced by half while maintaining its ability to measure parameters such as sea current and temperature in real time. After comparison with data processed from laboratory tests, the acquisition circuit showed an accuracy within 0.1 % and the XCP analogue circuit developed for the overall system was stable and reliable. The system exhibited an acquisition accuracy higher than 50 nV for 16 Hz, and the quality of the acquired signal satisfied the requirements for an XCP instrument.

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基于调制解调的一次性电流剖面仪的研制

摘要我们设计了一个低成本的可扩展电流剖面仪（XCP），包括软件和硬件。XCP是一种基于电流切割地磁场以感应电场的原理快速测量电流的观测仪器。XCP的成本必须降低，因为它是一次性设备。先前开发的XCP的数字化是在水下进行的，这需要探测器不仅包含用于获取信号的模拟电路，还包含相对昂贵的数字电路和数字芯片。在本研究中，开发了一种XCP，它采用信号调制和解调在漆包线上传输模拟信号，信号数字化发生在水面以上。该仪器的成本有效地降低了一半，同时保持了实时测量海流和温度等参数的能力。在与实验室测试处理的数据进行比较后，采集电路显示精度在0.1以内 % 为整个系统开发的XCP模拟电路稳定可靠。该系统的采集精度高于50 nV，适用于16 并且所获取的信号的质量满足XCPinstructure的要求。

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来源期刊

Geoscientific Instrumentation Methods and Data Systems GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES

CiteScore

3.70

自引率

0.00%

发文量

审稿时长

37 weeks

期刊介绍： Geoscientific Instrumentation, Methods and Data Systems (GI) is an open-access interdisciplinary electronic journal for swift publication of original articles and short communications in the area of geoscientific instruments. It covers three main areas: (i) atmospheric and geospace sciences, (ii) earth science, and (iii) ocean science. A unique feature of the journal is the emphasis on synergy between science and technology that facilitates advances in GI. These advances include but are not limited to the following: concepts, design, and description of instrumentation and data systems; retrieval techniques of scientific products from measurements; calibration and data quality assessment; uncertainty in measurements; newly developed and planned research platforms and community instrumentation capabilities; major national and international field campaigns and observational research programs; new observational strategies to address societal needs in areas such as monitoring climate change and preventing natural disasters; networking of instruments for enhancing high temporal and spatial resolution of observations. GI has an innovative two-stage publication process involving the scientific discussion forum Geoscientific Instrumentation, Methods and Data Systems Discussions (GID), which has been designed to do the following: foster scientific discussion; maximize the effectiveness and transparency of scientific quality assurance; enable rapid publication; make scientific publications freely accessible.