摘要
为克服传统指南针精度低,应用领域窄的缺点。利用HMC1052磁阻传感器将地磁信号转换为电压输出,INA332仪表运放,AMS1117直流稳压芯片及REF3212参考电压源作为信号调理和供电单元,由MSP430F147单片机及其自带A/D转换器,进行信号处理和控制,制作得到准确可靠,图形化界面的低功耗方向指示系统。其内部结构固定,可以和其它电子系统形成接口,拥有低成本、低功耗、高精度的特点,具有磁偏角校正功能。
The system is designed to overcome the low accuracy and the shortcomings of a narrow applica tion area of the traditional compass. It uses HMC1052 .magnetoresistive sensor to transform magnetic signal into a voltage output. INA332 OPAMP instrument, AMS1117 Voltage regulator, REF3212 reference volt age source are used as signal conditioning and power supply unit. MSP430F147 and single-chip A /D converters are used to process and control signal. Then the directional low-power system with accurate and re liable graphical interface is made. Its internal structure is fixed and can easily formed the interface with other electronic systems. The desrgned system is with significant low-cost, low-power, high precision features, and magnetic declination correction.
出处
《电子器件》
CAS
2009年第6期1112-1117,共6页
Chinese Journal of Electron Devices
关键词
磁阻传感器
方向指示
信号调理
低功耗
magnetoresistive sensor
direction indication
signal conditioning low power
