@1365953620 这样干！
<link name="laser_link">
<sensor name='gpu_lidar' type='gpu_lidar'>
<topic>lidar</topic>
<update_rate>10</update_rate>
<lidar>
<scan>
<horizontal>
<samples>640</samples>
<resolution>1</resolution>
<min_angle>-1.396263</min_angle>
<max_angle>1.396263</max_angle>
</horizontal>
<vertical>
<samples>16</samples>
<resolution>1</resolution>
<min_angle>-0.261799</min_angle>
<max_angle>0.261799</max_angle>
</vertical>
</scan>
<range>
<min>0.08</min>
<max>10.0</max>
<resolution>0.01</resolution>
</range>
</lidar>
<alwaysOn>1</alwaysOn>
<visualize>true</visualize>
</sensor>
</link>
