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yuquan_position_acquirer's Introduction

代码说明

这些代码为陈烨柯和公冶在田在SRTP后半阶段所写,针对CICT(论文名)的实物部分。作用为通过交互界面,获得全局导航图数据,在线或离线处理实车点云、相机、gps、底盘、imu数据,根据位姿截取局部导航图,使所有数据同步并按格式保存于本地,并对数据进行滤波处理和做相应的pm、ipm变换,得到网络所需输入输出。

数据存放

数据存放于data文件夹中,由于部分代码在服务器中使用,这些代码中的部分路径与当前运行环境并不匹配

get_positions

获得运行的全局导航地图

左键右键点击获得gps坐标

右键点击的点会被记录下来

中键点击撤销

全局的示意图如下:

局部的示意图如下:

get_real_data

通过读取message,获取、处理并保存位姿、速度、加速度、角速度、点云、GPS等信息

可以在线读取,也可以回放bag数据读取

最新的代码可以通过ekf得到imu和GPS融合后的结果,并保存

pm

通过位姿信息(pos.txt或者ekf.txt)得到未来位姿在当前相机图像的投影,包含了异常数据检测和滤波等功能

ipm

通过pm和激光雷达数据得到势场图如图:

gene_nav

单独通过gps数据生成导航图,减少get_real_data的负担,增加代码实时性,生成导航图的时候需要map和navigation两张图片

ekf_pos

imu和GPS数据融合的代码主体,使用x,y,theta,v为状态量,w(z轴角速度),a(x轴加速度)为控制量,被控对象为四轮差分的小车。融合后效果显著提升于gps。

效果对比如下(前者为未滤波,后者为滤波后):

filters

一些对位置、角度量平滑化的滤波器尝试,主要是简单的二维kf,用来对每一个数据做平滑处理。效果一般。

play

播放指定文件夹下的图片,并生成视频。

compare

对比EKF与纯GPS得到的轨迹,并可视化

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