Digital signal processing method of fluxgate compass
Article Text (Baidu Translation)
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摘要: 为提高磁通门罗盘的指向精度和稳定性, 提出了磁通门罗盘的数字信号处理方法。利用微处理器直接产生激励信号, 通过模数转换采集磁通门传感器感应的磁场信号, 对所采集的原始信息进行傅里叶变换获取偶次谐波, 得到罗盘方位值。计算结果表明: 二次谐波的波形幅度在各偶次谐波中最大, 其提取精度至少提高5倍, 而且采用多个偶次谐波并行使用解算方位的方法, 降低了原始噪声, 增大了原始信息的利用率, 提高了磁通门传感器的灵敏度, 因此, 数字信号处理方法可行。Abstract: In order to improve the pointing precision and stability of fluxgate compass, a digital signal processing method was put forward. Driving signal was generated by micro processor, magnetic field digital signal from fluxgate sensor was collected by convert analog, even harmonics were obtained by Fourier transform from original signal, and the orientation of fluxgate compass was calculated according to even harmonics. Computation result shows that the amplitude of quadratic harmonic is biggest, its extraction precision is improved by five times at least, the noise of original signal is reduced, its using efficiency is enhanced and the sensitivity of fluxgate sensor is improved because of the computed orientation from multiple even harmonics, so the method is feasible.
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[1] 郭爱煌, 傅君眉. 磁通门技术及其应用[J]. 传感器技术, 2000, 19(4): 1-4. doi: 10.3969/j.issn.1000-9787.2000.04.001Guo Ai-huang, Fu Jun-mei. Measurement Technology of magnetic flux and its application[J]. Journal of Transducer Technology, 2000, 19(4): 1-4. (in Chinese) doi: 10.3969/j.issn.1000-9787.2000.04.001 [2] 许晖, 石秀华, 曹永辉. 磁通门罗盘的设计[J]. 传感技术学报, 2003, 16(4): 464-466. doi: 10.3969/j.issn.1004-1699.2003.04.020Xu Hui, Shi Xiu-hua, Cao Yong-hui. The design of the flux-gate compass[J]. Chinese Journal of Sensors and Actuators, 2003, 16(4): 464-466. (in Chinese) doi: 10.3969/j.issn.1004-1699.2003.04.020 [3] 李昆, 杨震夏, 金晓滨. 一种新型方位传感器[J]. 传感器技术, 2001, 20(7): 26-29. doi: 10.3969/j.issn.1000-9787.2001.07.008Li Kun, Yang Zhen-xia, Jin Xiao-bin. Anewtype transducer of measuring direction[J]. Journal of Transducer Technology, 2001, 20(7): 26-29. (in Chinese) doi: 10.3969/j.issn.1000-9787.2001.07.008 [4] 李新娥, 原彦飞. 一种激磁电源电路的设计[J]. 测试技术学报, 2002, 16(S): 765-770.Li Xin-e, Yuan Yan-fei. Adesign of excitation power circuit[J]. Journal of Test and Measurement Technology, 2002, 16(S): 765-770. (in Chinese) [5] 谢子殿, 朱秀, 周鑫. 磁通门信号处理电路的设计与研究[J]. 黑龙江科技学院学报, 2003, 13(2): 47-50. https://www.cnki.com.cn/Article/CJFDTOTAL-HLJI200302013.htmXie Zi-dian, Zhu Xiu, Zhou Xin. Design and study of fluxgate signal processing circuit[J]. Journal of Heilongjiang Institute of Science & Technology, 2003, 13(2): 47-50. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-HLJI200302013.htm [6] 石志勇, 王怀光, 庞发亮. 磁通门信号处理电路分析与设计[J]. 兵工自动化, 2006, 25(6): 82-83. doi: 10.3969/j.issn.1006-1576.2006.06.038Shi Zhi-yong, Wang Huai-guang, Pang Fa-liang. Analysisand design for signal processing circuit of fluxgate[J]. Ordance Industry Automation, 2006, 25(6): 82-83. (in Chi-nese). doi: 10.3969/j.issn.1006-1576.2006.06.038 [7] 肖胜红, 肖振坤, 边少锋, 等. 弱磁场检测方法与仪器研究[J]. 舰船电子工程, 2006, 26(4): 158-162. doi: 10.3969/j.issn.1627-9730.2006.04.045Xiao Sheng-hong, Xiao Zhen-kun, Bian Shao-feng, et al. Research of the detecting method and instrument for weak magnetic field[J]. Ship Electronic Engineering, 2006, 26(4): 158-162. (in Chinese) doi: 10.3969/j.issn.1627-9730.2006.04.045 [8] 林钢, 杨会平, 白彦峥, 等. 高精度空间磁通门磁力计[J]. 华中科技大学学报: 自然科学版, 2005, 33(12): 61-63. doi: 10.3321/j.issn:1671-4512.2005.12.019Lin Gang, Yang Hui-ping, Bai Yan-zheng, et al. Space flux-gate magnetometer with high precision[J]. Journal of Hua-zhong University of Science and Technology: Nature Science Edition, 2005, 33(12): 61-63. (in Chinese) doi: 10.3321/j.issn:1671-4512.2005.12.019 [9] 何乃明. 磁通门探测器的数值计算与仿真[J]. 仪器仪表学报, 2002, 23(2): 157-160. doi: 10.3321/j.issn:0254-3087.2002.02.013He Nai-ming. The numerical calculation and simulation of fluxgate detector[J]. Chinese Journal of Scientific Instrument, 2002, 23(2): 157-160. (in Chinese) doi: 10.3321/j.issn:0254-3087.2002.02.013 [10] 郭志友, 孙慧卿. 磁传感器的非线性误差修正技术[J]. 传感器技术, 2004, 23(5): 54-55. doi: 10.3969/j.issn.1000-9787.2004.05.017Guo Zhi-you, Sun Hui-qing. Technology of non-linearity error on magnetic sensors[J]. Journal of Transducer Technology, 2004, 23(5): 54-55. (in Chinese) doi: 10.3969/j.issn.1000-9787.2004.05.017 [11] 张瑞平, 刘俊, 刘文怡. 高灵敏度的磁通门传感器[J]. 弹箭与制导学报, 2005, 25(1): 246-248. https://www.cnki.com.cn/Article/CJFDTOTAL-DJZD2005S1052.htmZhang Rui-ping, Liu Jun, Liu Wen-yi. High-sensitivity flux-gate[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2005, 25(1): 246-248. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DJZD2005S1052.htm [12] 李金瑞, 韩震宇. 基于DSP的数字式多路正弦波发生器设计[J]. 电子工程师, 2006, 32(1): 25-27. https://www.cnki.com.cn/Article/CJFDTOTAL-DZGS200601008.htmLi Jin-rui, Han Zhen-yu. Designed of digital multiple sine wave generator based on DSP[J]. Electronic Engineer, 2006, 32(1): 25-27. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DZGS200601008.htm [13] 张学孚, 陆怡良. 磁通门技术[M]. 北京: 国防工业出版社, 1995. [14] 纪震, 钟锦春, 强乐. DSP系统入门与实践[M]. 北京: 电子工业出版社, 2006. [15] 查萨英. DSP原理及其C编程开发技术[M]. 王华, 张健, 译. 北京: 电子工业出版社, 2005. [16] 陈恒亮, 蒋勇. 基于DSP的实数FFT算法研究与实现[J]. 动力学与控制学报, 2005, 3(2): 50-53. https://www.cnki.com.cn/Article/CJFDTOTAL-DLXK200502009.htmChen Heng-liang, Jiang Yong. Design and realization of real FFT based on DSP[J]. Journal of Dynamics and Control, 2005, 3(2): 50-53. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DLXK200502009.htm -