DSRC-based vehicle speed measuring method and device, and DSRC application system

A measuring method and technology of measuring device, which are applied to the traffic control system, traffic control system, instrument and other directions of road vehicles, can solve the problem of not having the function of vehicle speed measurement, and achieve the expansion of function and use range, improvement of stability, and simplification of the system. Effects of structure and operation

Active Publication Date: 2014-01-15
SHENZHEN GENVICT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the safety of vehicles on roads such as urban highways and expressways, it is sometimes necessary to measure the speed of passing vehicles in order to monitor and manage these vehicles. The violations of the vehicle need to be recorded, however, the current DSRC application system does not have the function of vehicle speed measurement

Method used

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  • DSRC-based vehicle speed measuring method and device, and DSRC application system
  • DSRC-based vehicle speed measuring method and device, and DSRC application system
  • DSRC-based vehicle speed measuring method and device, and DSRC application system

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Embodiment 1

[0032] Please refer to figure 1 , the vehicle speed measurement method in this embodiment is based on the information exchange between the RSU and the OBU. Among them, the RSU includes an outdoor unit and an indoor unit. The RSU outdoor unit has a transceiver antenna for sending microwave signals to the OBU and receiving microwave signals from the OBU. The RSU outdoor unit is usually installed above the road or on the side of the road. The RSU indoor unit is used for Control the RSU outdoor unit and process the information received and sent by the RSU outdoor unit; the OBU also has an antenna for sending microwave signals to the RSU and receiving microwave signals from the RSU. The OBU is usually installed in the vehicle, such as fixed on the vehicle on the front windshield. The method of the present embodiment mainly includes steps:

[0033] S101: Please refer to figure 2 and image 3 , when the vehicle enters the coverage area of ​​the RSU signal shown by the dotted lin...

Embodiment 2

[0063] The difference between this embodiment and the previous embodiment is that the RSU only realizes the positioning in one direction during the process of locating the vehicle, especially realizes the positioning of the vehicle in the first direction parallel to the road extension direction to obtain a one-dimensional Coordinate positioning information, specifically, in the two positioning steps of this embodiment, the positioning information of the vehicle at time t1 includes the position coordinate y1 of the vehicle in the first direction, and the positioning information of the vehicle at time t2 includes the position of the first direction Coordinate y2, in the calculation step, the distance information includes the driving distance Sy of the vehicle along the first direction between the time t1 and t2, and its calculation formula is Sy=|y2-y1|, and the speed information includes the distance between the time t1 and t2 of the vehicle The driving speed Vy along the first ...

Embodiment 3

[0065] like Figure 5 As shown, the DSRC-based vehicle speed measuring device used in this embodiment to implement Embodiment 1 or Embodiment 2 includes an RSU, and the RSU mainly includes a signal receiving module 10 , a positioning module 20 , a calculation module 30 and a signal matching module 40 .

[0066] Wherein the signal receiving module 10 is arranged on the RSU outdoor unit, which includes an antenna for receiving a plurality of microwave signals sent by the vehicle through the OBU, at least one microwave signal carries the vehicle information of the vehicle, and at least two microwave signals correspond to time t1 and t2 respectively , where the time interval between t1 and t2 is t0;

[0067] The positioning module 20 is used to obtain the positioning information of the vehicle at the time t1 through the microwave signal at the time t1, and obtain the positioning information of the vehicle at the time t2 through the microwave signal at the time t2; The recording m...

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Abstract

The invention discloses a DSRC-based vehicle speed measuring method and device, and a DSRC application system. The method comprises the following steps: a RSU is used to receive a plurality of microwave signals sent by a vehicle through an OBU, wherein at least one microwave signal carries the vehicle information of the vehicle, at least two microwave signals correspond to a t1 moment and a t2 moment respectively, and the time interval between the t1 moment and the t2 moment is t0; the RSU is used to acquire the positioning information of the vehicle at the t1 moment according to the microwave signal of the t1 moment, and acquire the positioning information of the vehicle at the t2 moment according to the microwave signal of the t2 moment; and the RSU is used to calculate the distance information of the vehicle between the t1 moment and the t2 moment by utilizing the positioning information of the t1 moment and the positioning information of the t2 moment of the vehicle, and calculate the speed information of the vehicle between the t1 moment and the t2 moment according to the distance information and the time interval t0. According to the invention, the vehicle speed measuring process can be simplified, the vehicle can be positioned accurately, and functions of existing DSRC equipment can be extended.

Description

technical field [0001] The present application relates to the field of intelligent transportation (ITS: Intelligent Transportation System), in particular to a DSRC (DSRC: Dedicated Short Range Communications)-based vehicle speed measurement method, device and DSRC application system. Background technique [0002] DSRC application systems such as Electronic Toll Collection (ETC: Electronic Toll Collection) systems usually use DSRC key equipment Road Side Unit (RSU: Road Side Unit) and On-board Unit (OBU: On-board Units) to charge, detect or monitor vehicles . [0003] In order to ensure the safety of vehicles on roads such as urban highways and expressways, it is sometimes necessary to measure the speed of passing vehicles in order to monitor and manage these vehicles. The violations of the vehicle need to be recorded, however, the current DSRC application system does not have the function of vehicle speed measurement. Contents of the invention [0004] The present applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/052G07B15/06
Inventor 杨成段作义徐根华林树亮李兴锐
Owner SHENZHEN GENVICT TECH
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