Wireless traffic sensor system
First Claim
1. A wireless traffic sensor system comprising:
- a plurality of wireless traffic sensors collecting traffic and vehicle related information from one or more vehicles that pass by said plurality of wireless traffic sensors; and
at least one wireless communication device that receives said traffic and vehicle related information from at least one of said plurality of wireless traffic sensors and relays said traffic and vehicle related information to a wireless communication tower in vicinity, wherein said plurality of wireless traffic sensors include a first wireless traffic sensor (WTS) and a second WTS being separated from each other by a distance D along a vehicle passing path;
said first WTS giving a first estimated speed of a first vehicle passing said first WTS along said path at a first time;
said second WTS giving a second estimated speed of a second vehicle passing said second WTS along said path at a second time, the wireless traffic sensor system further comprises a data processing unit that determines whether said second vehicle and said first vehicle are a same vehicle based upon said first estimated speed at said first time;
said second estimated speed at said second time; and
said distance D between said first and said second WTSs.
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Abstract
Embodiments of the present invention provide a wireless traffic sensor system. The system includes a plurality of wireless traffic sensors collecting traffic information from one or more vehicles that pass by; and at least one wireless communication device that receives the traffic information from at least one of the wireless traffic sensors and relays the traffic information to a wireless communication tower in vicinity. At least one of the wireless traffic sensors is placed inside a container and has a mounting flange that lays over edge of the container and is affixed to the container by one or more spring clips. The spring clips are not physically accessible once the wireless traffic sensor is affixed to the container, and are released only upon receiving a coded wireless electromagnetic signal or by a special tool that matches to a key inside the wireless traffic sensor.
37 Citations
14 Claims
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1. A wireless traffic sensor system comprising:
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a plurality of wireless traffic sensors collecting traffic and vehicle related information from one or more vehicles that pass by said plurality of wireless traffic sensors; and at least one wireless communication device that receives said traffic and vehicle related information from at least one of said plurality of wireless traffic sensors and relays said traffic and vehicle related information to a wireless communication tower in vicinity, wherein said plurality of wireless traffic sensors include a first wireless traffic sensor (WTS) and a second WTS being separated from each other by a distance D along a vehicle passing path;
said first WTS giving a first estimated speed of a first vehicle passing said first WTS along said path at a first time;
said second WTS giving a second estimated speed of a second vehicle passing said second WTS along said path at a second time, the wireless traffic sensor system further comprises a data processing unit that determines whether said second vehicle and said first vehicle are a same vehicle based upon said first estimated speed at said first time;
said second estimated speed at said second time; and
said distance D between said first and said second WTSs. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless traffic sensor system comprising:
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a first wireless traffic sensor (WTS) and a second WTS being installed in ground along a vehicle passing path and separated by a pre-determined distance; and a data processing unit, wherein said data processing unit receives a first speed of a first vehicle estimated by said first WTS at a first time when said first vehicle passes by said first WTS;
receives a second speed of a second vehicle estimated by said second WTS at a second time when said second vehicle passes by said second WTS; and
determines whether said second vehicle and said first vehicle are a same vehicle based upon said first estimated speed at said first time, said second estimated speed at said second time, and said pre-determined distance between said first and said second WTSs. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification