三轴磁通门采集系统的设计及实现

The Design and Realization of Three Axis Fluxgate Acquisition System

文中针对三轴磁通门传感器,设计了基于ADS1299的高精度电路,解决了多通道信号同步采集的问题;使用STM32单片机作为主控制器,实时进行AD采样数据处理,并设计了丰富的数据传输接口,以便于系统集成;设计了上位机进行实时采样数据的显示测量;针对移动地磁测量和数据后处理,采用GNSS接收机的定位和时间信息,对采样数据的授时算法进行了研究。经过实验室测试和外场测试,采样系统噪声和稳定性可以满足设计要求。

In This paper,a high-precision circuit based on ads1299 is designed to solve the problem of multi channel signal synchronous acquisition.STM32 MCU is used as the main controller to process AD sampling data in real time,and rich data transmission interfaces are designed to facilitate system integration.The host computer software is designed to display and measure the real-time sampling data.Aiming at mobile geoma gnetic measurement and data post-processing,the time service algorithm of sampled data is studied by using the positioning and time information of GNSS receiver.After the laboratory test and outfield test,the noise and stability of the sampling system can meet the design requirements.