物联网环境下失真杂散单点信号配时效率仿真  

Simulation of Timing Efficiency for Spurious and Distorted Single Point Signal in the Environment of Internet of Things

作　　者：曾英 李晓明[2] ZENG Ying;LI Xiao-ming(Sichuan Institute of Industrial Technology,Deyang Sichuan 618500,China;School of Computer and Control Engineering,Qiqihar University,Qiqihar Heilongjiang 161006,China)

机构地区：[1]四川工业科技学院,四川德阳618500 [2]齐齐哈尔大学计算机与控制工程学院,黑龙江齐齐哈尔161006

出　　处：《计算机仿真》2020年第8期63-66,81,共5页Computer Simulation

摘　　要：针对传统信号配时方案造成的车队长度超过路段距离、道路交叉口拥堵的问题,提出一种物联网环境下失真杂散单点信号配时效率。首先利用交通物联网获取高峰车辆流量和原有信号配时等数据,在物联网环境下建立DDS数据模型。然后根据幅度量化误差ROM舍位对输出频谱实施分布,获得DDS幅度量化主谱周围失真杂散的信噪比。综合考虑行驶车辆通过单点最短绿灯时间,依据周期时长和相位时间对单交叉口合理设计,对信号配时的时段准确划分,确保各个配时时间段中的交通量。最后,根据信控延误范围,验证单交叉口的通行性能,从而提高真杂散单点信号配时效率。仿真结果表明,所提方法能够大幅度降低车辆的平均延误与道路拥堵现象,具有实用性、高效性以及优质的鲁棒性。In traditional signal timing scheme,the length of traffic exceeded the distance of road and the roads were congested in the intersection.Therefore,this paper presented a kind of distorted and spurious signal timing efficiency of single point in the Internet of things.Firstly,the data such as the peak traffic and original signal timing efficiency were obtained by the Internet of things,and DDS data model was built in the Internet of things.Then,the output spectrums were distributed by the ROM truncation of amplitude quantization error,and the distortion and spurious signal-to-noise ratio around DDS amplitude quantization main spectrum was obtained.Considering the shortest green time when the vehicle passed a single point,a single intersection was designed reasonably according to the cycle time and phase time.Finally,the time interval of signal timing was accurately divided to ensure the traffic volume in each time period.According to the range of signal control delay,the trafficability of single intersection was verified to improve the timing efficiency of distorted and spurious signal of single point.Simulation results show that the proposed method can greatly reduce the average delay of vehicles and road congestion,and it has practicability,efficiency and high-quality robustness.

关 键 词：幅度量化 频谱分布规律 周期时长 单点信号配时 

分 类 号：TP392[自动化与计算机技术—计算机应用技术]