A photoelectric detection device and control method suitable for T-shaped intersections

Abstract

The invention discloses a photoelectric detecting device and a control method suitable for a T-shaped intersection in the field of traffic equipment and traffic control methods. The photoelectric detecting device is composed of a laser transmitter, a signal receiver, a control unit and a traffic signal lamp. A laser transmitter and a corresponding signal receiver are arranged on the entrance and exit ends of each lane controlled by a traffic light at each crossing of the T-shaped intersection. For the T-shaped intersection with a too long one-way queue and small traffic flow in other directions, the queue length in all directions of the intersection and the time for the intersection to reach queue overflow can be detected in real time, and at the same time data such as time headway and traffic flow can be detected. The device has the advantages of common required components and low cost. When the device is arranged, the damage of the device to a road is small. The maintenance is convenient. The detection results are accurate. The device is not affected by factors such as bad weather and insufficient night light.

Description

technical field [0001] The invention belongs to the field of traffic equipment devices and traffic control methods, in particular, a traffic signal control device and method suitable for T-shaped intersections. Background technique [0002] With the development of intelligent transportation, according to the intersection traffic flow data obtained by real-time detection, the traffic signal control system of dynamic adaptive mode for dynamic optimization of the traffic signal control scheme has been applied. The existing dynamic adaptive mode traffic signal control method is usually to set the induction detector upstream of the entrance road at the intersection to obtain traffic flow data and optimize the green light time of the signal phase. This method cannot effectively identify the traffic lights on the entrance road. Real-time vehicle queuing status, that is, queuing length, and the time it takes to reach a certain queuing length. The current traffic detection equipment...

AI Technical Summary

Problems solved by technology

The existing dynamic adaptive mode traffic signal control method is usually to set the induction detector upstream of the entrance road at the intersection to obtain traffic flow data and optimize the green light time of the signal phase. This method cannot effectively identify the traffic lights on the entrance road. Real-time vehicle queuing status, that is, the queuing length and the time it takes to reach a certain queuing length

The current traffic detection equipment is more commonly used as pressure-sensitive sensing devices and video detection devices, but the pressure-sensitive sensing devices have three main disadvantages: first, the pressure-sensitive sensing devices generally need to be buried underground, and the road damage area is large; Sensing is performed by the pressure generated by vehicles passing by. A large number of vehicles pass by and the pressure-sensitive sensors are easily damaged. Third, once pressure is generated on the road surface, the data will show that there are motor vehicles passing by. The number is misleading, and the pressure created by pedestrians or bicycles here can also be mistaken for motor vehicles

However, the detection results of the video detection device are easily affected by bad weather, insufficient light at night, etc., and the maintenance is inconvenient and the cost is high

The existing signal light control method is usually a fixed mode in which the signal phase and red light time of the intersection remain unchanged, and there is a lack of signal control schemes adjusted for the real-time vehicle queuing conditions at T-shaped intersections

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