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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union

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Geosci. Instrum. Method. Data Syst., 6, 263-267, 2017
https://doi.org/10.5194/gi-6-263-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
14 Jul 2017
Dynamic data transmission technology for expendable current profiler based on low-voltage differential signaling
Shuhan Li1,2, Qisheng Zhang1,2, Xiao Zhao1,2, Shenghui Liu1,2, Zhenzhong Yuan1,2, and Xinyue Zhang1,2 1Key Laboratory of Geo-detection, China University of Geosciences, Beijing, Ministry of Education, Beijing, P.R. China
2School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, P.R. China
Abstract. A dynamic data transmission technology for expendable current profilers (XCPs) is proposed in this paper. Two parallel varnished wires are employed as the data transmission medium. By testing the transmission properties of the varnished wires, a baseband transmission system is studied and designed. Modified low-voltage differential signaling (LVDS) is adopted as the physical layer for data transmission. The data transmission protocol is modified and optimized in accordance with the RS-232 protocol, and the Manchester code is superimposed. According to the results of indoor and marine tests, the data transmission distance of the designed system, which employs a 0.1 mm diameter varnished wire, extends to 2 km with high efficiency and accuracy for data transmission, exhibiting excellent performance. Moreover, this data transmission technology could be used for other expendable marine-environment parametric measuring instruments such as an expendable bathythermograph and an expendable conductivity temperature depth profiler.

Citation: Li, S., Zhang, Q., Zhao, X., Liu, S., Yuan, Z., and Zhang, X.: Dynamic data transmission technology for expendable current profiler based on low-voltage differential signaling, Geosci. Instrum. Method. Data Syst., 6, 263-267, https://doi.org/10.5194/gi-6-263-2017, 2017.
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Short summary
The main contribution of our paper is the proposal of a dynamic data transmission technology of an expendable current profiler, using varnished wires as the data transmission medium. The results of both indoor and marine tests demonstrate high efficiency and accuracy for transmission distances up to 2 km. We believe that this study will be of interest to the readership because our research is of particular interest and use for scientific marine investigation.
The main contribution of our paper is the proposal of a dynamic data transmission technology of...
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