The invention discloses an incoming vehicle triggering system capable of effectively preventing ambient light interference. The incoming vehicle triggering system comprises a laser and a test part; the laser device is a linear laser device with the wavelength of 800-1,000 nm, and the projected laser can irradiate the column pantograph; the test part is that the optical filter, the lens, the diaphragm and the photoelectric detector are sequentially installed into a whole from front to back; the optical filter is a band-pass optical filter, and the transmission wavelength of the optical filter is the same as the laser wavelength; the lens is used for focusing incoming light on the diaphragm; the diaphragm only allows part of light to enter the photoelectric detector; the photoelectric detector generates an electric signal based on the received light and then sends the signal to external equipment; and the length of the laser bar projected on the pantograph is 10-30 times of the length ofthe light entering the diaphragm. The coming vehicle triggering system can be applied to ranging and outdoor scenes of 2m and above, the influence of ambient light in all seasons is prevented, the response speed reaches ns level, the response speed is high, meanwhile, a low-power laser can be used, and the use safety is improved.
本发明公开了一种有效防止环境光干扰的来车触发系统,包括:激光器和测试部件;激光器,波长为800~1000nm的线性激光器,投射的激光能照射在列受电弓上;测试部件,从前到后依次安装为一体的滤光片、镜头、光阑及光电探测器;滤光片为带通滤光片,其透射波长同激光器波长;镜头用于将进入的光聚焦在光阑上;光阑仅允许部分光进入光电探测器;光电探测器基于接收到的光产生电信号后向外接设备发送信号;投射在受电弓上激光条的长度为进入光阑光线长度的10~30倍。该来车触发系统,其能够应用在2m及以上测距、户外的场景,防止各季节环境光的影响,响应速度达ns级,响应速度快,同时可使用小功率激光器,提高使用安全性。
The incoming vehicle triggering system can effectively prevent ambient light interference
有效防止环境光干扰的来车触发系统
2021-03-26
Patent
Electronic Resource
Chinese
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