FCD system and device using beacon
A technology of signal lights and collection equipment, applied to the mobile vehicle data system and the field of composition of this system, can solve the problems of difficulty in distinguishing vehicles that have stopped, inability to grasp the density of traffic congestion of signal lights, and difficulty in grasping traffic conditions quickly and in detail.
Inactive Publication Date: 2005-09-28
PANASONIC CORP
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Problems solved by technology
[0013] (2) The central device can only measure the time required between signal lights
The central device cannot grasp the density of traffic congestion between signal lights
[0014] (3) It is difficult to distinguish whether the vehicle that informs the passing time information of the signal light 20 has stopped in the middle
However, a lot of data has to be collected to apply this method and the traffic conditions are constantly changing during this collection process
As a result, it is difficult to grasp traffic conditions quickly and in detail by means of conventional methods
[0016] On the other hand, the FCD system using a portable phone introduces a big problem that the user has to bear the communication fee
Method used
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Embodiment Construction
[0081] (first embodiment)
[0082] In the first embodiment, the system will be explained as follows, in which the on-board unit measures "average speed" or "travel time" at each unit interval in units of a predetermined distance, and then uploads the measured data to the downstream traffic lights.
[0083] In this system, as figure 1 As shown, an upstream signal lamp 10 and a downstream signal lamp 20 are provided on a target road section where traffic information is to be collected, and the distance between the signal lights on the target road section is known.
[0084] The upstream signal light 10 uploads its own signal light number and sampling interval of data measurement to the FCD unit equipped in the passing vehicle. As shown in FIG. 2( a ), the upstream signal light 10 specifies a unit interval distance (for example, 150 meters) as the sampling interval, and the average speed within this distance will be measured. exist figure 1 In , the distance between white dot...
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An object of the present invention is to provide an FCD system capable of collecting effectively traveling locus data of a vehicle while putting characteristics of beacons into practical use. In a system of the present invention for collecting traveling locus data from a in-vehicle unit in a vehicle via beacons, a downstream-side beacon (20) collects the traveling locus data, then calculates a traveling distance of the vehicle from an upstream-side beacon (10) to the downstream-side beacon (20) based on the traveling locus data, and then decides whether or not the traveling locus data of the vehicle are used in analyzing traffic conditions of the objective road, by comparing the traveling distance with a distance on an objective road from the upstream-side beacon (10) to the downstream-side beacon (20). The high-precision traffic information can be obtained by collecting the traveling locus data of the vehicle effectively by using the beacons.
Description
technical field [0001] The present invention relates to the moving car data (floating car data (FCD)) system that gathers the data that indicates traffic condition from vehicle and it as traffic information and compose this system, or more specifically, is used for realizing data by utilizing traffic light Acquisition system equipment. Background technique [0002] In recent years, preliminary studies have been conducted on what is called a probe vehicle (or mobile vehicle), that is, a system that uses a vehicle as a sensor to collect traffic information. In this system, the FCD in-vehicle unit (in-vehicle unit) installed in the vehicle records data such as the moving speed and position of the vehicle and transmits the data to the central device, while the central device analyzes the moving trajectory data transmitted from each vehicle ( traveling locus data) and generate road traffic information on traffic flow, etc. [0003] A current system of transmitting data recorded...
Claims
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IPC IPC(8): G08G1/13G08G1/01G08G1/052G08G1/123G08G1/127H04B7/26H04W64/00
CPCG08G1/052G08G1/0104G08G1/01
Inventor 足立晋哉
Owner PANASONIC CORP