Piezo - electrical ultrasonic motors were used to drive the linear slideways supported by the cross roller bearings , position information was fed back by the optical encoders , the total closed - loop control system was constituted 伺服机构采用压电超声电机直接驱动由滚柱导轨支承的直线工作台,通过高精度光栅尺构成全闭环反馈。
Gps receiver module get signals from satellites ahead . the signals contain timing and positioning information from the satellites , which can determine the time and the position of the receiver accurately 全球定位系统接收器负责接收来自卫星的讯号。讯号包含该卫星的时间和位置资料;利用不同卫星的资料,可以推算该观测站的准确位置和时间,并将准确的报时讯号传送到计时器。
The visual motion track and position information on the track analysis map of navigation mark will help managers make their decisions effectively . multiple alarms are also used to send alarm messages to managers rapidly and reliably 通过直观的航标轨迹分析图详细地显示航标的漂移轨迹和位置信息,为航标管理人员提供有力的决策支持:使用多种报警方式,可靠地向航标管理人员快速传递警报信息。
Secondly , author develops an applied receive system based on gps76 , which can receive the satellitic signal of gps and communicate with computer via serial port , then writes the receive program according to the output protocol to acquire position information of tracking station 其次详细介绍了gps76接收机的结构、 gps76与计算机通过串口进行通信的实用接收系统,并根据输出协议编写了接收程序,实现地面gps位置信息的提取。
In velocity measurement module , taking place of traditional radar , video velocity measurement use vehicle ' s 2d position information in the captured image to get its 3d position information in the real 3d world , and then calculate the vehicle ' s velocity according its 3d position information 车辆测速模块,作者采用视频测速技术代替传统的雷达测速技术,根据车辆在抓拍图像中的二维位置信息计算出其在三维空间的实际位置信息,进而计算出车辆速度。