Wireless traffic sensor system

• US 20150054662A1
• Filed: 11/04/2014
• Published: 02/26/2015
• Est. Priority Date: 10/28/2010
• Status: Active Grant

• Current Assignee: Tongqing Wang
• Original Assignee: Tongqing Wang
• Inventors: Wang, Tongqing
• Granted Patent: US 10,395,518 B2
• Time in Patent Office: Days
• US Class Current: 340/936
• CPC Class Codes: E01F 11/00 Road engineering aspects of Embedding pads or other sensitive devices in paving or other road surfaces , e.g. traffic detectors, vehicle-operated pressure-sensitive actuators, devices for monitoring atmospheric or road conditionspressure-sensitive elements G01L; traffic control systems G08G
• CPC Class Codes: G08G 1/0116 from roadside infrastructure, e.g. beacons
• CPC Class Codes: G08G 1/0133 for classifying traffic situation
• CPC Class Codes: G08G 1/0141 for traffic information dissemination
• CPC Class Codes: G08G 1/017 identifying vehicles G08G1/015, G08G1/054 take precedence
• CPC Class Codes: G08G 1/02 using treadles built into the road pads or other sensitive devices responsive to passage of vehicles E01F11/00
• CPC Class Codes: G08G 1/052 with provision for determining speed or overspeed speed measuring in general G01P
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves

Abstract

Embodiments of present invention provide a wireless traffic sensor system. The system includes a first and a second wireless traffic sensors being installed in ground along a vehicle passing path; and a battery charging unit in vicinity of the first and second wireless traffic sensors, wherein the battery charging unit converts solar power into a plurality of electrical pulses, the electrical pulses being transmitted to at least the first and second wireless traffic sensors; and wherein the first and second wireless traffic sensors convert the plurality of electrical pulses into DC power, the DC power being used in charging a rechargeable battery inside the first and second wireless traffic sensors respectively.

Claims

1. A wireless traffic sensor system comprising:

at least a first wireless traffic sensor (WTS) and a second WTS being installed in ground along a vehicle passing path; and

a battery charging unit located in vicinity of said first and second wireless traffic sensors,

wherein said battery charging unit converts solar power into a plurality of electrical pulses being transmitted to said first and second wireless traffic sensors; and

wherein said first and second wireless traffic sensors use said plurality of electrical pulses in charging a rechargeable battery inside said first and second wireless traffic sensors respectively.

2. The wireless traffic sensor system of claim 1, wherein information collected by said first and second wireless traffic sensors are relayed through a communication device to a wireless communication tower nearby, said information being related to one or more vehicles that pass by said first and second wireless traffic sensors.

3. The wireless traffic sensor system of claim 2, wherein said communication device is a cell phone being carried by one of said one or more vehicles and is not in use by any person inside said one of said one or more vehicles.

4. The wireless traffic sensor system of claim 3, at least one of said first and second wireless traffic sensors is placed inside a container and is fastened to said container by one or more spring clips at a mounting flange.

5. The wireless traffic sensor system of claim 4, wherein said one or more spring clips are not physically accessible when said at least one of said first and second wireless traffic sensors is fastened to said container, said one or more spring clips are released upon receiving a coded wireless electromagnetic signal to disengage said at least one of said first and second wireless traffic sensors from said container.

6. The wireless traffic sensor system of claim 4, wherein said one or more spring clips are not physically accessible after said at least one of said first and second wireless traffic sensors is fastened to said container, said one or more spring clips are released from said container by a tool that is made to match a key inside said at least one of said first and second wireless traffic sensors.

7. The wireless traffic sensor system of claim 1, wherein said first and second wireless traffic sensors provide vehicle related information, said vehicle related information, together with a distance information between said first WTS and said second WTS, being used in determining whether a first vehicle passing by said first WTS and a second vehicle passing by said second WTS is a same vehicle.

8. The wireless traffic sensor system of claim 7, wherein said vehicle related information includes a first estimated speed of said first vehicle at a first time and a second estimated speed of said second vehicle at a second time.

9. A wireless traffic sensor system comprising:

a first and a second wireless traffic sensor (WTS) being installed in ground along a vehicle passing path; and

a battery charging unit in vicinity of said first and second wireless traffic sensors,

wherein said battery charging unit converts solar power into a plurality of electrical pulses, said electrical pulses being transmitted to at least said first and second wireless traffic sensors; and

wherein said first and second wireless traffic sensors convert said plurality of electrical pulses into DC power, said DC power being used in charging a rechargeable battery inside said first and second wireless traffic sensors respectively.

10. The wireless traffic sensor system of claim 9, wherein information collected by said first and second wireless traffic sensors are relayed through a communication device to a wireless communication tower nearby, said information being related to one or more vehicles that pass by said first and second wireless traffic sensors.

11. The wireless traffic sensor system of claim 10, wherein said communication device is a cell phone carried by one of said one or more vehicles.

12. The wireless traffic sensor system of claim 11, wherein said first and second wireless traffic sensors are placed inside first and second containers, and are fastened to said first and second containers by one or more spring clips at a mounting flange.

13. The wireless traffic sensor system of claim 12, wherein said one or more spring clips are not physically accessible when said first and second wireless traffic sensors are fastened to said first and second containers, said one or more spring clips are released only upon receiving a coded wireless electromagnetic signal or by a special tool made to match a key inside said first and second wireless traffic sensors to disengage said first and second wireless traffic sensors from said first and second containers, respectively.

14. The wireless traffic sensor system of claim 9, wherein said first and second wireless traffic sensors is a pair of wireless traffic sensors used in determining whether a first vehicle passing by said first WTS and a second vehicle passing by said second WTS is a same vehicle.

15. The wireless traffic sensor system of claim 14, wherein vehicle related information including a first speed of said first vehicle estimated by said first WTS and a second speed of said second vehicle estimated by said second WTS are used in the determination.