地震研究

针对无人机多传感器矢量磁测补偿系统,研制了一套小体积、低功耗的多通道数据同步采集系统。该系统采用模拟采集和控制部分分开设计的方法。模拟采集部分基于STM32处理器STM32F103C8T6,集成了9通道24位高精度的模数转换芯片ADS1255、倾角和温度传感器,能够实现9通道数据的同步采集、飞行载体的倾角数据和温度数据的获取。控制部分基于32位ARM低功耗处理器S3C2416和嵌入式LINUX系统,完成了数据实时采集、SD卡存储、GNSS同步校时和网络通信等功能,并具有功耗低、体积小的特点,满足了机载数据采集系统特定的应用需求。

A multi-channel synchronous data acquisition system with small volume and low power consumption was developed for the UAV multi-sensor vector magnetic measurement compensation system.It adopted a separate design of analog acquisition and control parts,which effectively improved flexibility of installation in limited space.The analog acquisition part was based on STM32 processor STM32F103C8T6,which integrated 9-channel 24-bit high-precision analog-to-digital converter ADS1255,inclination chip and temperature sensor.It can realize synchronous acquisition of 9-channel data,inclination data and temperature data of the carrier.The control part was based on the 32-bit ARM low power processor S3C2416 and embedded LINUX system,and completed the functions of real-time data acquisition,SD card storage,GNSS synchronous time calibration and network communication,and had low power consumption and small size,which can meet the specific application requirements of airborne data acquisition system.

引言
1 系统设计方案
2 模拟采集部分
3 控制部分
4 性能指标测试
5 讨论
6 结论

图1 数据采集系统框图
Fig.1 The system chart

图2 电源模块电路图<br/>Fig.2 The power module circuit diagram

图2 电源模块电路图
Fig.2 The power module circuit diagram

图3 9通道AD同步采集模块<br/>Fig.3 The nine-channel AD synchronous collection module

图3 9通道AD同步采集模块
Fig.3 The nine-channel AD synchronous collection module

图4 模拟采集程序流程图<br/>Fig.4 The flow chart of simulation acquisition program

图4 模拟采集程序流程图
Fig.4 The flow chart of simulation acquisition program

图5 控制部分框图<br/>Fig.5 The block diagram of the control section

图5 控制部分框图
Fig.5 The block diagram of the control section

图6 驱动程序设计<br/>Fig.6 Design of the driver program

图6 驱动程序设计
Fig.6 Design of the driver program

图7 应用程序设计<br/>Fig.7 Design of the application program

图7 应用程序设计
Fig.7 Design of the application program

表1 线性测试数据记录<br/>Tab.1 The linear test recordings

表1 线性测试数据记录
Tab.1 The linear test recordings

图8 线性测试结果<br/>Fig.8 Results from the linear test

图8 线性测试结果
Fig.8 Results from the linear test

表2 幅频特性测试记录<br/>Tab.2 Recordings of amplitude-frequency characteristics test

表2 幅频特性测试记录
Tab.2 Recordings of amplitude-frequency characteristics test

图9 采集系统幅频特性测试<br/>Fig.9 Test diagram of the amplitude-frequency characteristics

图9 采集系统幅频特性测试
Fig.9 Test diagram of the amplitude-frequency characteristics

图10 3台磁通门磁力仪(50 Hz)与台站磁力仪(1 Hz)日变曲线记录<br/>Fig.10 Diurnal curves of three fluxgate magnetometers(50 Hz)and the station magnetometer(1 Hz)

图10 3台磁通门磁力仪(50 Hz)与台站磁力仪(1 Hz)日变曲线记录
Fig.10 Diurnal curves of three fluxgate magnetometers(50 Hz)and the station magnetometer(1 Hz)

表3 3台磁通门磁力仪(50 Hz)与台站磁力仪(1 Hz)日变数据互相关系数<br/>Tab.3 Cross correlation coefficients between the daily variation data of three fluxgate magnetometers(50 Hz)and the station magnetometer(1 Hz)

表3 3台磁通门磁力仪(50 Hz)与台站磁力仪(1 Hz)日变数据互相关系数
Tab.3 Cross correlation coefficients between the daily variation data of three fluxgate magnetometers(50 Hz)and the station magnetometer(1 Hz)

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备注

引言

1 系统设计方案

2 模拟采集部分

3 控制部分

4 性能指标测试

5 讨论

6 结论

期刊信息