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Device and method for acquiring traffic information

A traffic information collection and traffic information technology, which is applied in the field of traffic information collection devices based on wireless video sensor networks, can solve the problems of inflexible network structure, poor real-time performance of overall information, and small coverage of node equipment, and achieves flexible network structure. , easy to expand, improve acquisition quality and real-time effect

Inactive Publication Date: 2009-09-23
INST OF AUTOMATION CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of small coverage of node equipment in the prior art, poor real-time performance of overall information, inflexible network structure, and difficult expansion of the system, the purpose of the present invention is to propose a traffic information collection device based on a wireless video sensor network

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  • Device and method for acquiring traffic information
  • Device and method for acquiring traffic information
  • Device and method for acquiring traffic information

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the described embodiments are only intended to facilitate the understanding of the present invention, rather than limiting it in any way.

[0029] The device of the present invention is composed of multiple video-based traffic information collection node devices. Such as figure 1 As shown in the hardware structure diagram of the traffic information collection node device, the node device includes: a wireless communication module 101, a data line 102, a control line 103, a processing module 104, an interface 105, and a video collection module 106; the video collection module 106 adopts a CMOS camera, and the interface 105 adopts USB interface, and processing module 104 adopts TMS320DM642 processor chip; Video collection module 106 is connected with processing module 104 by USB interface 105, and processing module 104 receives and processes the vi...

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Abstract

The invention discloses a device and a method for acquiring traffic information. A plurality of node devices for traffic information acquisition based on video are arranged on one side of a road one by one, and are used for acquiring the information of two-way traffic flow on the road. The adjacent node devices communicate with each other in a wireless mode so as to form a wireless sensor network. Visual fields of adjacent node devices have a covered overlap region used for providing the adjacent node devices with cooperation time and space. Through the traffic information synthesis of the adjacent node devices, a lowest-reaches node obtains the traffic information in a whole range. The node devices communicate through a Zigbee protocol, and the synthesis of overall information from the traffic information acquired by the node devices is realized through the cooperation of the adjacent node devices. The acquired traffic information comprises road flow rate, occupancy, average velocity and motion tracks of vehicles. The invention has the characteristics of flexible network structure, as well as the wide range and high real-time property of the acquired traffic information.

Description

technical field [0001] The invention relates to the field of urban road traffic information collection and application, in particular to a traffic information collection device and method based on a wireless video sensor network. Background technique [0002] The traffic signal controller needs to predict the arrival of vehicles in each direction according to the traffic information within the range of several adjacent intersections, so as to optimize the release time of each phase. Traffic signal controllers have high requirements for real-time information, and generally this information cannot be obtained through a single collection node device. The traffic information collection devices currently used generally work in a single-point manner, and the node devices are independent of each other. Each node device independently analyzes the traffic flow information within the collection range, and the node devices themselves cannot synthesize local information into a larger ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/065G08G1/052
Inventor 王飞跃汤淑明朱凤华李镇江黄武陵刘建庚姚庆明艾云峰乔昕
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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