camera_ws/src/ros_astra_camera/launch/multi_device.launch

<launch>
    <!-- unique camera name-->
    <arg name="camera_name" default="camera"/>
    <!-- Hardware depth registration -->
    <arg name="3d_sensor" default="dabai_xx"/>
    <!-- stereo_s_u3, astrapro, astra -->
    <arg name="camera1_prefix" default="01"/>
    <arg name="camera2_prefix" default="02"/>
    <arg name="camera1_serila_number" default="CH2C6310057"/>
    <arg name="camera2_serila_number" default="CH2C631009B"/>
    <arg name="device_num" default="2"/>
    <include file="$(find astra_camera)/launch/$(arg 3d_sensor).launch">
        <arg name="camera_name" value="$(arg camera_name)_$(arg camera1_prefix)"/>
        <arg name="serial_number" value="$(arg camera1_serila_number)"/>
        <arg name="device_num" value="$(arg device_num)"/>
    </include>

    <include file="$(find astra_camera)/launch/$(arg 3d_sensor).launch">
        <arg name="camera_name" value="$(arg camera_name)_$(arg camera2_prefix)"/>
        <arg name="serial_number" value="$(arg camera2_serila_number)"/>
        <arg name="device_num" value="$(arg device_num)"/>
    </include>
</launch>