A Intelligent Course Measure System Based On Fluxgate Technique

The intelligent course measure system based on fluxgate technique is a synthetical design and application system. Fluxgate sensor inducts the environment magnetic field, outputs the compass course signal to the CPU system. This signal then is transformed into digital signal. CPU processes it and then gains compass course. When use rotary mathod to measure the deviations, CPU first collects timed the compass course come from the Fluxgate sensor, then calculates automatically their deviations and the correspondent coefficients. Based on all this, CPU can calculates out the real-time magnetic course or the real-time ture course, then sents them to display on the digital displayer. This paper gives a theoretical disseration on the operating principle of the system. It also gives a idiographic exoatiate on the system's hardware and the system's software. As a result of all above work, the system has be developed. The test result indicated: fluxgate output course error is less then 0°.32 . Using rotary mathod measure the standard course and thinking of the influence non-homogeneity of ship rotary and the error of initial heading deviation, its synthetical error can be less then 1° . The synthetical analysis result is that the accuracy that system test deviations is about 1° , the accuracy that system display courses is about 1° . This paper also gives a mathod of correcting the deviations with the coefficients when the ship gets alongside the wharf. It also summarizes the status in quo and the development of magnetic compass technique and the deviation measure and correction technique. Finally, the paper analyses the error and extending service function of the system further.