The invention provides a positioning system. The system comprises a plurality of roadside devices and a vehicle-mounted device. The roadside devices are installed at different longitudinal positions of a tunnel, each roadside device comprises an optical signal transmitting module, and the optical signal transmitting modules are used for transmitting optical signals to running vehicles. The vehicle-mounted device is used for being installed on a vehicle and comprises optical signal receiving and calculating modules. The optical signal receiving module is used for receiving optical signals, detecting the included angle between the transmitting direction and the transverse direction, counting the optical signal receiving times and converting the optical signals into electric signals. The calculating module is used for obtaining the position of each roadside device according to the number of optical signal receiving times, namely, the longitudinal distance between the vehicle and any roadside device is calculated by pre-storing the position of the roadside device and presetting a transmitting depression angle by the transmitting module, the transverse distance is obtained according tothe distance between the roadside device and the vehicle-mounted device and the included angle between the straight line where the roadside device and the vehicle-mounted device are located and the transverse direction, a relative position is obtained according to the transverse and longitudinal distances, and a first positioning result is obtained according to the relative position and the position of the roadside device. Through the scheme, the accurate position of the vehicle can be obtained.
本发明提供一种定位系统,该系统包括:多个路侧装置,用于安装在隧道不同纵向位置;路侧装置包括光信号发射模块;光信号发射模块用于面向行驶车辆发射光信号;车载装置,用于安装在车辆上,包括光信号接收和计算模块;光信号接收模块用于接收光信号并检测发射和横向方向间夹角,对接收光信号计次,将光信号转成电信号;计算模块,用于由接收光信号次数获得路侧装置位置,由预先存储路侧装置位置和其发射模块预先设定发射俯角计算车辆与路侧装置纵向距离,根据路侧装置与车载装置位置间距离和其所在直线与横向方向夹角得到横向距离,由横向与纵向距离得到相对位置,由相对位置和路侧装置位置得到第一定位结果。通过上述方案能够获得车辆精确位置。
Positioning system
定位系统
2020-09-11
Patent
Elektronische Ressource
Chinesisch
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