https://download.csdn.net/download/qq_45685327/87718396
在前面小车底盘基础之上,添加摄像头和雷达传感器。
0.底盘实现
deamo02_base.xacro
<!--
使用 xacro 优化 URDF 版的小车底盘实现:
实现思路:
1.将一些常量、变量封装为 xacro:property
比如:PI 值、小车底盘半径、离地间距、车轮半径、宽度 ....
2.使用 宏 封装驱动轮以及支撑轮实现,调用相关宏生成驱动轮与支撑轮
-->
<!-- 根标签,必须声明 xmlns:xacro -->
<robot name="my_base" xmlns:xacro="http://www.ros.org/wiki/xacro">
<!-- 封装变量、常量 -->
<xacro:property name="PI" value="3.141"/>
<!-- 宏:黑色设置 -->
<material name="black">
<color rgba="0.0 0.0 0.0 1.0" />
</material>
<!-- 底盘属性 -->
<xacro:property name="base_footprint_radius" value="0.001" /> <!-- base_footprint 半径 -->
<xacro:property name="base_link_radius" value="0.1" /> <!-- base_link 半径 -->
<xacro:property name="base_link_length" value="0.08" /> <!-- base_link 长 -->
<xacro:property name="earth_space" value="0.015" /> <!-- 离地间距 -->
<!-- 底盘 -->
<link name="base_footprint">
<visual>
<geometry>
<sphere radius="${base_footprint_radius}" />
</geometry>
</visual>
</link>
<link name="base_link">
<visual>
<geometry>
<cylinder radius="${base_link_radius}" length="${base_link_length}" />
</geometry>
<origin xyz="0 0 0" rpy="0 0 0" />
<material name="yellow">
<color rgba="0.5 0.3 0.0 0.5" />
</material>
</visual>
</link>
<joint name="base_link2base_footprint" type="fixed">
<parent link="base_footprint" />
<child link="base_link" />
<origin xyz="0 0 ${earth_space + base_link_length / 2 }" />
</joint>
<!-- 驱动轮 -->
<!-- 驱动轮属性 -->
<xacro:property name="wheel_radius" value="0.0325" /><!-- 半径 -->
<xacro:property name="wheel_length" value="0.015" /><!-- 宽度 -->
<!-- 驱动轮宏实现 -->
<xacro:macro name="add_wheels" params="name flag">
<link name="${name}_wheel">
<visual>
<geometry>
<cylinder radius="${wheel_radius}" length="${wheel_length}" />
</geometry>
<origin xyz="0.0 0.0 0.0" rpy="${PI / 2} 0.0 0.0" />
<material name="black" />
</visual>
</link>
<joint name="${name}_wheel2base_link" type="continuous">
<parent link="base_link" />
<child link="${name}_wheel" />
<origin xyz="0 ${flag * base_link_radius} ${-(earth_space + base_link_length / 2 - wheel_radius) }" />
<axis xyz="0 1 0" />
</joint>
</xacro:macro>
<xacro:add_wheels name="left" flag="1" />
<xacro:add_wheels name="right" flag="-1" />
<!-- 支撑轮 -->
<!-- 支撑轮属性 -->
<xacro:property name="support_wheel_radius" value="0.0075" /> <!-- 支撑轮半径 -->
<!-- 支撑轮宏 -->
<xacro:macro name="add_support_wheel" params="name flag" >
<link name="${name}_wheel">
<visual>
<geometry>
<sphere radius="${support_wheel_radius}" />
</geometry>
<origin xyz="0 0 0" rpy="0 0 0" />
<material name="black" />
</visual>
</link>
<joint name="${name}_wheel2base_link" type="continuous">
<parent link="base_link" />
<child link="${name}_wheel" />
<origin xyz="${flag * (base_link_radius - support_wheel_radius)} 0 ${-(base_link_length / 2 + earth_space / 2)}" />
<axis xyz="1 1 1" />
</joint>
</xacro:macro>
<xacro:add_support_wheel name="front" flag="1" />
<xacro:add_support_wheel name="back" flag="-1" />
</robot>
1.摄像头和雷达 Xacro 文件实现
摄像头 xacro 文件:
deamo03_camera.xacro
<!-- 摄像头相关的 xacro 文件 -->
<robot name="my_camera" xmlns:xacro="http://wiki.ros.org/xacro">
<!-- 摄像头属性 -->
<xacro:property name="camera_length" value="0.01" /> <!-- 摄像头长度(x) -->
<xacro:property name="camera_width" value="0.025" /> <!-- 摄像头宽度(y) -->
<xacro:property name="camera_height" value="0.025" /> <!-- 摄像头高度(z) -->
<xacro:property name="camera_x" value="0.08" /> <!-- 摄像头安装的x坐标 -->
<xacro:property name="camera_y" value="0.0" /> <!-- 摄像头安装的y坐标 -->
<xacro:property name="camera_z" value="${base_link_length / 2 + camera_height / 2}" /> <!-- 摄像头安装的z坐标:底盘高度 / 2 + 摄像头高度 / 2 -->
<!-- 摄像头关节以及link -->
<link name="camera">
<visual>
<geometry>
<box size="${camera_length} ${camera_width} ${camera_height}" />
</geometry>
<origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0" />
<material name="black" />
</visual>
</link>
<joint name="camera2base_link" type="fixed">
<parent link="base_link" />
<child link="camera" />
<origin xyz="${camera_x} ${camera_y} ${camera_z}" />
</joint>
</robot>
雷达 xacro 文件:
deamo04_laser.xacro
<!--
小车底盘添加雷达
-->
<robot name="my_laser" xmlns:xacro="http://wiki.ros.org/xacro">
<!-- 雷达支架 -->
<xacro:property name="support_length" value="0.15" /> <!-- 支架长度 -->
<xacro:property name="support_radius" value="0.01" /> <!-- 支架半径 -->
<xacro:property name="support_x" value="0.0" /> <!-- 支架安装的x坐标 -->
<xacro:property name="support_y" value="0.0" /> <!-- 支架安装的y坐标 -->
<xacro:property name="support_z" value="${base_link_length / 2 + support_length / 2}" /> <!-- 支架安装的z坐标:底盘高度 / 2 + 支架高度 / 2 -->
<link name="support">
<visual>
<geometry>
<cylinder radius="${support_radius}" length="${support_length}" />
</geometry>
<origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0" />
<material name="red">
<color rgba="0.8 0.2 0.0 0.8" />
</material>
</visual>
</link>
<joint name="support2base_link" type="fixed">
<parent link="base_link" />
<child link="support" />
<origin xyz="${support_x} ${support_y} ${support_z}" />
</joint>
<!-- 雷达属性 -->
<xacro:property name="laser_length" value="0.05" /> <!-- 雷达长度 -->
<xacro:property name="laser_radius" value="0.03" /> <!-- 雷达半径 -->
<xacro:property name="laser_x" value="0.0" /> <!-- 雷达安装的x坐标 -->
<xacro:property name="laser_y" value="0.0" /> <!-- 雷达安装的y坐标 -->
<xacro:property name="laser_z" value="${support_length / 2 + laser_length / 2}" /> <!-- 雷达安装的z坐标:支架高度 / 2 + 雷达高度 / 2 -->
<!-- 雷达关节以及link -->
<link name="laser">
<visual>
<geometry>
<cylinder radius="${laser_radius}" length="${laser_length}" />
</geometry>
<origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0" />
<material name="black" />
</visual>
</link>
<joint name="laser2support" type="fixed">
<parent link="support" />
<child link="laser" />
<origin xyz="${laser_x} ${laser_y} ${laser_z}" />
</joint>
</robot>
2.组合底盘摄像头与雷达的 xacro 文件
deamo05_xacrocar.xacro
<!-- 组合小车底盘与摄像头与雷达 -->
<robot name="xacrocar" xmlns:xacro="http://wiki.ros.org/xacro">
<xacro:include filename="deamo02_base.xacro" />
<xacro:include filename="deamo03_camera.xacro" />
<xacro:include filename="deamo04_laser.xacro" />
</robot>
3.launch 文件
demo06_xacrocar.launch
<launch>
<param name="robot_description" textfile="$(find urdf01_rviz)/urdf/xacro/deamo05_xacrocar.urdf" />
<node pkg="rviz" type="rviz" name="rviz" args="-d $(find urdf01_rviz)/config/show_mycar.rviz" />
<!-- 添加关节状态发布节点 -->
<node pkg="joint_state_publisher" type="joint_state_publisher" name="joint_state_publisher" />
<!-- 添加机器人状态发布节点 -->
<node pkg="robot_state_publisher" type="robot_state_publisher" name="robot_state_publisher" />
<!-- 可选:用于控制关节运动的节点 -->
<node pkg="joint_state_publisher_gui" type="joint_state_publisher_gui" name="joint_state_publisher_gui" />
</launch>
4.生成的urdf文件
deamo05_xacrocar.urdf文章来源:https://www.toymoban.com/news/detail-423042.html
<?xml version="1.0" encoding="utf-8"?>
<!-- =================================================================================== -->
<!-- | This document was autogenerated by xacro from deamo05_xacrocar.xacro | -->
<!-- | EDITING THIS FILE BY HAND IS NOT RECOMMENDED | -->
<!-- =================================================================================== -->
<robot name="xacrocar">
<material name="black">
<color rgba="0.0 0.0 0.0 1.0"/>
</material>
<link name="base_footprint">
<visual>
<geometry>
<sphere radius="0.001"/>
</geometry>
</visual>
</link>
<link name="base_link">
<visual>
<geometry>
<cylinder length="0.08" radius="0.1"/>
</geometry>
<origin rpy="0 0 0" xyz="0 0 0"/>
<material name="yellow">
<color rgba="0.5 0.3 0.0 0.5"/>
</material>
</visual>
</link>
<joint name="base_link2base_footprint" type="fixed">
<parent link="base_footprint"/>
<child link="base_link"/>
<origin xyz="0 0 0.055"/>
</joint>
<link name="left_wheel">
<visual>
<geometry>
<cylinder length="0.015" radius="0.0325"/>
</geometry>
<origin rpy="1.5705 0.0 0.0" xyz="0.0 0.0 0.0"/>
<material name="black"/>
</visual>
</link>
<joint name="left_wheel2base_link" type="continuous">
<parent link="base_link"/>
<child link="left_wheel"/>
<origin xyz="0 0.1 -0.0225"/>
<axis xyz="0 1 0"/>
</joint>
<link name="right_wheel">
<visual>
<geometry>
<cylinder length="0.015" radius="0.0325"/>
</geometry>
<origin rpy="1.5705 0.0 0.0" xyz="0.0 0.0 0.0"/>
<material name="black"/>
</visual>
</link>
<joint name="right_wheel2base_link" type="continuous">
<parent link="base_link"/>
<child link="right_wheel"/>
<origin xyz="0 -0.1 -0.0225"/>
<axis xyz="0 1 0"/>
</joint>
<link name="front_wheel">
<visual>
<geometry>
<sphere radius="0.0075"/>
</geometry>
<origin rpy="0 0 0" xyz="0 0 0"/>
<material name="black"/>
</visual>
</link>
<joint name="front_wheel2base_link" type="continuous">
<parent link="base_link"/>
<child link="front_wheel"/>
<origin xyz="0.0925 0 -0.0475"/>
<axis xyz="1 1 1"/>
</joint>
<link name="back_wheel">
<visual>
<geometry>
<sphere radius="0.0075"/>
</geometry>
<origin rpy="0 0 0" xyz="0 0 0"/>
<material name="black"/>
</visual>
</link>
<joint name="back_wheel2base_link" type="continuous">
<parent link="base_link"/>
<child link="back_wheel"/>
<origin xyz="-0.0925 0 -0.0475"/>
<axis xyz="1 1 1"/>
</joint>
<link name="camera">
<visual>
<geometry>
<box size="0.01 0.025 0.025"/>
</geometry>
<origin rpy="0.0 0.0 0.0" xyz="0.0 0.0 0.0"/>
<material name="black"/>
</visual>
</link>
<joint name="camera2base_link" type="fixed">
<parent link="base_link"/>
<child link="camera"/>
<origin xyz="0.08 0.0 0.0525"/>
</joint>
<link name="support">
<visual>
<geometry>
<cylinder length="0.15" radius="0.01"/>
</geometry>
<origin rpy="0.0 0.0 0.0" xyz="0.0 0.0 0.0"/>
<material name="red">
<color rgba="0.8 0.2 0.0 0.8"/>
</material>
</visual>
</link>
<joint name="support2base_link" type="fixed">
<parent link="base_link"/>
<child link="support"/>
<origin xyz="0.0 0.0 0.115"/>
</joint>
<link name="laser">
<visual>
<geometry>
<cylinder length="0.05" radius="0.03"/>
</geometry>
<origin rpy="0.0 0.0 0.0" xyz="0.0 0.0 0.0"/>
<material name="black"/>
</visual>
</link>
<joint name="laser2support" type="fixed">
<parent link="support"/>
<child link="laser"/>
<origin xyz="0.0 0.0 0.1"/>
</joint>
</robot>
5.运行launch文件,查看效果
roslaunch urdf01_rviz demo06_xacrocar.launch
文章来源地址https://www.toymoban.com/news/detail-423042.html
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