基于单片机的三维地磁探测系统设计

为了实时探测弹道修正弹的姿态角,利用HMC1043三轴磁阻传感器和C8051F350单片机构成了一个高精度地磁探测系统。介绍了目前已有的各种磁传感器及其优缺点,给出了HMC1043的置位/复位电路及其与单片机的接口方法,计算了系统的分辨率,进行了不等位电压实验与动态定向精度实验。结果表明,本系统不仅简化了电路结构,而且具有精度高和转换速率较快的优点,能够满足微旋弹道修正弹姿态角高精度实时探测的需要。

Design of 3-Dimension geomagnetic detection system based on MCU

In order to detect the attitude angles of trajectory correction projectiles in real time,the 3-axis magnetoresistive sensor HMC1043 and the MCU C8051F350 are used.The advantages and shortcomings of currently used magnetic sensors are introduced,the circuit of set/reset of the sensor and its interface to MCU are brought out and the system resolution is analyzed,at last the bias voltage and the precision of dynamic orientation are tested.The results testified that the geomagnetic detection system has the advantages of simplified circuit structure and high sample rate and can meet the need of high precision and real time detection of attitude angles for trajectory correction projectiles.