摘要
为提高罗盘精度,降低成本,携带方便,设计了一种新型实用的电子磁罗盘.当磁性材料趋于磁饱和后,电感自感系数与磁场强度成反比,在RL振荡电路中,振荡频率与自感系数成反比,所以振荡频率与磁场强度成正比.根据单片机测出RL振荡电路的频率,确定磁方位角.在液晶屏幕上显示实际测量角度值.用RL振荡电路正反充放电的方法消除了仪器本身引起的误差,并且用软件校正各种外界因素引起的误差.该罗盘用数字信号处理技术,抗干扰能力强,精度高,可靠性好.实际测试结果表明该仪器测量的数据误差小于1°,满足了实际应用的要求.
The author designed a new kind of compass which has the features of greater accuracy, low cost and greater portability. When the magnetic material gets saturated, the inductance＇ s self-induced coefficient is inversely proportional to the magnetic field＇s intensity which is proportional to the surge frequency in RL surge oscillator circuits. The magnetic azimuth angle which is displayed on the LCD is calculated based on the frequency of the RL surging circuits detected by MCU. The errors caused by the apparatus itself are modified by the positive and inverse charging and discharging of RL circuits, and those caused by the outside are modified by the software. This compass adopts digital processing techniques, and it is anti-jamming, precise, dependable, and flexible. Test results have proved that the electromagnetic compass can reach a high accuracy. The error is less than 1 degree. Thus it can meet the requirements of actual application.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第3期495-498,共4页
Journal of Xidian University
作者简介
马万明（1980-），男，西安电子科技大学硕士研究生，E—mail：slgwlmwm1980@163．com．
