The invention discloses a traffic opening traffic flow detection system which comprises a vehicle detection unit arranged on a lane where a traffic opening is located, a road side unit for estimating traffic flow according to the vehicle detection unit and a traffic flow monitoring unit connected with the road side unit. The vehicle detection unit comprises a first geomagnetic sensor and a second geomagnetic sensor which are arranged on a traffic lane, the second geomagnetic sensor is arranged behind the first geomagnetic sensor in the traffic lane direction, and the distance between the two geomagnetic sensors is not larger than the vehicle length; the first geomagnetic sensor and the second geomagnetic sensor are both connected with the roadside unit, and the roadside unit judges whether a vehicle merges into a traffic entrance or not according to geomagnetic signals received by the first geomagnetic sensor and the second geomagnetic sensor and adjusts the detection result of the vehicle according to the distance between the vehicles on the lane at the moment. According to the invention, vehicle detection errors caused by deviation of threshold signals due to environmental interference can be avoided, and the traffic flow detection accuracy is improved.
本发明公开了一种交通口车流量检测系统,包括设置在交通口所在的车道上的车辆检测单元、根据车辆检测单元对车流进行预估的路侧单元以及与路侧单元连接的车流监控单元,所述车辆检测单元包括设置在行车道上的第一地磁传感器和第二地磁传感器,第二地磁传感器设置在行车道方向上的第一地磁传感器的后方,且两个地磁传感器之间的距离不大于车长;所述第一地磁传感器和第二地磁传感器均与路侧单元连接,路侧单元根据第一地磁传感器和第二地磁传感器接收到的地磁信号判断是否有车辆汇入交通口,并根据此时车道上车辆之间的距离对车辆的检测结果进行调整。本发明可以避免环境干扰对阈值信号的偏移所导致的车辆检测误差,提高车流检测准确率。
Traffic intersection traffic flow detection system
一种交通口车流量检测系统
2023-10-13
Patent
Electronic Resource
Chinese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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