实验目的：熟悉USART通信.串口调试助手发送数据给877，877收到后再转发回串口助手-Experimental Objective: To know USART communications. Serial debugging assistant to send data to 877,877 and then forwarded back to receive the serial Assistant

基于点云数据的模型边界提取程序，包含测试数据，从其他地方下载转发，完全可以运行。-Based on point cloud data model boundary extraction procedure, contains the test data, download forwarded other places, can run.