Expressway road traffic detecting method and device based on car networking beacon mechanism

A traffic detection and highway technology, applied in traffic flow detection, road vehicle traffic control system, traffic control system, etc., can solve the problems of weather interference, backward technology, high price, and achieve strong external interference ability and simple equipment. , the effect of low cost

Active Publication Date: 2014-03-05
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of induction coil detection device is feasible for detecting vehicle information, but the technology used by these detection devices is relatively backward, and the installation and maintenance of the coil is expensive, which greatly limits the reliability and scalability of traffic detection.
The use of video vehicle detection systems is also relatively popular, but video has disadvantages such as low detection stability, weather interference, high price, and large amount of image processing calculations.
Similarly, GPS detection still has problems such as high cost and inaccurate positioning in occluded areas.

Method used

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  • Expressway road traffic detecting method and device based on car networking beacon mechanism
  • Expressway road traffic detecting method and device based on car networking beacon mechanism
  • Expressway road traffic detecting method and device based on car networking beacon mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Table 3 shows some records in the data structure table T when the simulation time reaches 90s. The data processing module takes the period as t r = 2d r / v=18s (where, d r =300m, ν=33.3m / sr) to traverse the data structure and upload detection information. Figure 5 It is a line chart of traffic flow statistics with a detection cycle of 3 minutes in the remote monitoring system.

[0081] table 3

[0082] EUI-64 direction First Time LastTime count 02:0C:85:FF:FE:AB:00:0B B=>A 50.26183 88.26183 76 02:0C:85:FF:FE:AB:00:12 A=>B 51.26274 85.26275 68 02:0C:85:FF:FE:AB:00:09 A=>B 54.28396 89.28396 70 02:0C:85:FF:FE:AB:00:13 B=>A 55.49404 90.49410 69 02:0C:85:FF:FE:AB:00:16 A=>B 55.61437 90.61437 70 02:0C:85:FF:FE:AB:00:0E A=>B 55.62891 89.62891 68

Embodiment 2

[0084] According to the simulation parameter settings, the beacon messages of each vehicle in the simulation are received on average Second-rate. When estimating the average speed, the speed ν of the vehicle whose current Count value is less than 72 is set to 120km / h, and the vehicle whose current Count value is greater than 72 is calculated according to the formula The corresponding speeds are calculated respectively, and the average estimated speed of the vehicles in the virtual detection area is 21.6m / s by averaging the vehicle speeds in the detection area. At this time, the average estimated speed is 33.3m / s (120km / h) lower than the minimum speed limit of the expressway. According to the congestion judgment standard, it is judged that traffic congestion occurs in the virtual detection area at this time (the average estimated speed in the simulation is 21.6 / h of the minimum speed limit). 33.3≈65%, this simulation determines that the average estimated speed is lower than ...

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Abstract

The invention discloses an expressway road traffic detecting method and device based on a car networking beacon mechanism. The expressway road traffic detecting device comprises a vehicle-mounted broadcast unit, a beacon receiving device A, a beacon receiving device B, a synchronous calibration module, an RS 485 bus, a data processing module, a wireless transmission module, a remote monitoring system and a data storage module. According to the expressway road traffic detecting method and device based on the car networking beacon mechanism, a virtual detecting area is established on an expressway, and the received beacon information is processed in the virtual detecting area to complete the traffic flow detection and the road real-time traffic condition monitoring. The external disturbance resisting capability is high, the device is simple, low in cost and accurate in detection, system maintenance is easy to achieve, the data processing complexity is reduced, the traffic detecting speed is increased, an assisting role can be played on the management of the traffic, and the road condition information can be fast collected and accurately monitored.

Description

technical field [0001] The invention relates to an electronic automatic detection method and device, in particular to a highway traffic detection method and device based on a vehicle network beacon mechanism. Background technique [0002] Traffic detection is an important part of traffic information collection and processing. It uses motor vehicles as detection objects to detect the running status of traffic vehicles in real time and collect road traffic information (mainly including vehicle speed, traffic flow, vehicle type and road occupancy rate, etc.) in a timely and effective manner. ), providing enough information for the intelligent traffic control system to perform optimal control. Traffic flow detection information is the basis for formulating road speed limits, improving roads, and setting traffic signs. It can also be used to analyze traffic accidents and promote the rapid development of intelligent transportation systems. [0003] At present, most of the widely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/056G08G1/065
Inventor 赵祥模马峻岩惠飞孟强马佳荣杨洋
Owner CHANGAN UNIV
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