車用磁電子羅盤的研制

介紹了磁電子羅盤的設(shè)計(jì)。利用自己生產(chǎn)的磁電阻傳感器研制了新型的磁電子羅盤。信號(hào)調(diào)理電路采用交流放大技術(shù)，有效解決了磁阻傳感器失調(diào)及漂移的影響。采用一周標(biāo)定法實(shí)現(xiàn)電子羅盤的自動(dòng)校準(zhǔn)。對(duì)所研制的羅盤進(jìn)行了室外試驗(yàn)，最大羅差小于1°。
關(guān)鍵詞：各向異性磁電阻，磁電阻傳感器，電子羅盤

Development of Vehicle Magnetic Electronic Compass Li Xisheng, Liu Hongyi, Guo Xiaoxia, Wang Lijin, Wang Shaochun University of Science and Technology Beijing, Beijing, 100083 Abstract: The design of magnetic electronic compass is introduced. Using magnetoresistive sensor made by ourselves, a novel magnetic electronic compass has been developed. In the portion of signal conditioning circuit, AC amplifying technique is involved so that the error due to null and drift of magnetoresistive sensor is minimized. One-circle calibration method is adopted to realize auto-calibration. The maximum of azimuth error is less than 1° in the outdoor test.
Key words: anisotropic magnetoresistance, magnetoresistive sensor, electronic compass