Research On The Sensing Detection Technologies For Multiple Physical Parameters Of Marine Environmental

The detection technology of marine environment is used to be applied to the research field such as ocean resources exploration, marine environmental protection, marine disasters, international marine cooperation research and military oceanography. Recently, with the investment of ocean resources exploration and the submarine engineering construction, the development of the sensing detection technologies of marine environment multiple physical parameters already becomes one of the key technologies about the advancement of the ocean scientific progress. As the basic marine environment parameters, through collecting, measuring and analyzing the parameters of temperature, depth and magnetism intensity can acquire the temporal and spatial distribution as well as the variation, which has great means to understand, exploit and use it. This thesis focuses on investigation and design the sensing detection technologies of marine environment multiple physical parameters system with high resolution and high stability. Besides, the physical parameters of temperature, depth and magnetism intensity are measured, the data obtained from the system are also analyzed and regulated in order to achieve the object for the real time detection of the marine environment multiple physical parameters variation.This paper is composed of three subsections:First of all, the state-of-art and tendency of the marine environment parameters detection techniques in domestic country and abroad are summarized and analyzed. In view of the special marine application environment, mainly analyze and research temperature sensor, pressure sensor and magneto resistive sensor, including measuring principle, internal structure, performance parameters, parts selection, sensors selection, characteristic analysis and research of external typical circuits.Secondly, the design of electronic system is described in the article. The hardware is basing on the Cortex-M3nucleus processor of STM32F103RC microcontroller, including the wheat-stone bridge circuit, constant flow source circuit, magnetic survey and set-reset circuit, high-precision analog-to-digital conversion circuit, power supply circuit, TF card storage circuit, and processor peripheral circuit, then it gives the attention and experience of the circuit designing. The software is involving the design of lower computer and the compilation of PC user end. The software of lower computer is including the A/D acquisition driver program, data processing program, serial communication programming, TF card storage program based on the FATFS file system and the file data compression protocol; Compiling the application program of PC user in Visual Studio2008integrated environment to realize the communication with the lower computer and display, process and analyze the data in real time.Finally, this paper carries out the related experiments of the system in the lab, with tidying and detailed analysis of the data from temperature, depth and magnetism intensity. Experiments verify the system is basically meeting the subject of the indicators required and the design target. At last the paper makes a summary of the whole working, analyzes and evaluates the problems of testing, points out the place that can be further improved and then foresees the application prospect of the marine environment multiple physical parameters sensing detection system.