如果示波器中测量的CAN线波形过低,这时需要调节示波器的
A. 振幅
B. 频率
C. 时间
D. 象限
在执行视觉传感器标定程序中,执行标定程序的命令是
A. .$ rosrun camera _ calibration cameracalibrator . py -- size (×) x ( Y )-- square ( a )/ image :=/ usb _ cam / image _ raw camera :=/ usb _ cam http://wiki.ros.org/camera_calibration/
B. http://wiki.ros.org/camera_calibration/
C. $rosdepinstalcamera_calibration
D. $roslaunchusb_camusb_cam-test.launch
在进行激光雷达测试时,运行激光雷达过滤地面程序的命令是
A. roslaunchvelodyne_pointcloudVLP16_points.launch
B. roslaunchplane_ground_filter
C. roslaunch euclidean _ cluster euclidean _ cluster . Launch
D. roslauncheuclidean_clustereuclidean_cluster.launch
在激光雷达建图过程中,打开终端,第三个输入的命令是
A. cddata/nvidia_ws
B. sourcedevel/setup.bash
C. .roslaunchaloam_velodynealoam_velodyne_VLP_1.launch
D. python scripts / record _ bag . Py
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