Public transportation vehicle locating method
A technology for public transport vehicles and positioning methods, which is applied to the traffic control system, traffic control system, measuring device and other directions of road vehicles, and can solve the problems of bus positioning limitation, the inability of GPS signal strength to meet the requirements, and the inability to perform some functions of GPS. Guarantee the effect of positioning requirements
Active Publication Date: 2008-07-16
QINGDAO HISENSE TRANS TECH
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Problems solved by technology
In relatively open areas, this method solves the problem of bus positioning; however, its disadvantages are also very obvious:
[0003] Now there are many high-rise buildings and viaducts in the city, and the existence of these high-rise buildings and viaducts can easily cause the GPS signal in some locations to be extremely weak, and then it cannot perform GPS functions.
In areas with dense high-rise buildings, or near viaducts, the strength of GPS signals cannot meet the requirements, resulting in GPS blind spots
This leads to the inability of the bus vehicle to obtain the GPS signal, and thus the inability to locate the vehicle
[0004] In addition, in areas with strong external electromagnetic interference, the strength of GPS signals cannot meet the requirements, which also restricts bus positioning
Method used
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[0024] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] Referring to FIG. 1 , a schematic diagram of an embodiment of an application environment of the present invention is illustrated. As shown in the figure, a crossroad is shown in the figure, including a driving bus 100, a vehicle positioning device 0 installed on the bus 100, and DSRC (Dedicated Short Range Communication, dedicated short range communication) installed on the road and on both sides of the road. short-range communication) short-range wireless positioning signal sources 1, 2, 3; also includes a reference point 4 arranged directly in front of the bus 100 in the driving direction.
[0026] Wherein, the short-range wireless positioning signal sources 1, 2, and 3 include a DSRC transmitting module, which continuously transmits wireless positioning signals, and the vehicle-mounted positioning device 0 receives the wireless positioning signals at any ti...
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The invention discloses a bus positioning method, which comprises the following steps: a, judging whether a remote wireless positioning signal is collected successfully, carrying out positioning through the remote wireless positioning signal if yes, and otherwise executing step b; b, obtaining the strength of a short-range wireless positioning signal; c, obtaining the position of a bus through the strength of the short-range wireless positioning signal. The invention adopts the short-range wireless positioning signal for positioning when the remote wireless positioning signal fails to meet requirements, thereby meeting the requirements of bus positioning surely.
Description
technical field [0001] The invention relates to the field of traffic control, in particular to a bus positioning method. Background technique [0002] In the prior art, most of the positioning of public transport vehicles adopts GPS signals for positioning. In relatively open areas, this method solves the problem of bus positioning; however, its disadvantages are also very obvious: [0003] Nowadays, there are many high-rise buildings and viaducts in the city, and the existence of these high-rise buildings and viaducts can easily cause the GPS signal in some locations to be extremely weak, and then the GPS part of the function cannot be performed. In areas with dense high-rise buildings or near viaducts, the strength of GPS signals cannot meet the requirements, resulting in GPS blind spots. This has resulted in the inability of the public transport vehicles to obtain GPS signals, and thus the inability to perform vehicle positioning. [0004] In addition, in areas with st...
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IPC IPC(8): G08G1/123G01S11/06
Inventor 徐龙芳李月高杨金东王朋王雷吴凤炎
Owner QINGDAO HISENSE TRANS TECH