APPARATUS AND METHOD FOR GENERATING TRAFFIC INFORMATION

• US 20120253648A1
• Filed: 03/30/2012
• Published: 10/04/2012
• Est. Priority Date: 04/01/2011
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: KIM, Do-Hyun, PARK, Jong-Hyun, YOO, Jae-Jun, KIM, Kyong-Ho
• Application Number:
  US13/435,564
• Publication Number:
  US 20120253648A1
• Time in Patent Office: Days
• US Class Current: 701/119
• CPC Class Codes: G08G 1/042 using inductive or magnetic detectors

Abstract

Disclosed herein are an apparatus and method for generating traffic information. The apparatus includes a first information collection unit, a second information collection unit, a comparison and analysis unit, and a computation unit. The first information collection unit collects first sensed data, including first reference sampled data and a plurality of pieces of first surrounding sampled data from a first sensor unit. The second information collection unit collects second sensed data, including second reference sampled data and a plurality of pieces of second surrounding sampled data from a second sensor unit. The comparison and analysis unit determines similarity between the first sensed data and the second sensed data, extracts a first time from the first sensed data, and extracts a second time from the second sensed data. The computation unit calculates the vehicle'"'"'s average speed.

Claims

1. An apparatus for generating traffic information, comprising:

a first information collection unit for collecting first sensed data, including first reference sampled data related to detection of information about a vehicle and a plurality of pieces of first surrounding sampled data obtained before and after the first reference sampled data, from a first sensor unit that samples variations in geomagnetism at a first point of a traffic lane at predetermined intervals;

a second information collection unit for collecting second sensed data, including second reference sampled data related to detection of information about the vehicle and a plurality of pieces of second surrounding sampled data obtained before and after the second reference sampled data, from a second sensor unit that samples variations in geomagnetism at a second point of the traffic lane at predetermined intervals;

a comparison and analysis unit for determining similarity between the first sensed data and the second sensed data by comparing them with each other, extracting a first time at which the vehicle passed the first sensor unit from the first sensed data, and extracting a second time at which the vehicle passed the second sensor unit, corresponding to the first time, from the second sensed data; and

a computation unit for calculating the vehicle'"'"'s average speed using information about the first time and the second time.

2. The apparatus of claim 1, wherein:

the first information collection unit collects the first sensed data based on a section in which the vehicle had entered the first sensor unit;

the second information collection unit collects the second sensed data based on a section in which the vehicle had entered the second sensor unit; and

the comparison and analysis unit extracts a time at which the vehicle entered the first sensor unit as the first time, and extracts a time at which the vehicle entered the second sensor unit as the second time.

3. The apparatus of claim 1, wherein:

the first information collection unit collects the first sensed data based on a section in which the vehicle had exited from the first sensor unit;

the second information collection unit collects the second sensed data based on a section in which the vehicle had exited from the second sensor unit; and

the comparison and analysis unit extracts a time at which the vehicle exited from the first sensor unit as the first time, and extracts a time at which the vehicle exited from the second sensor unit as the second time.

4. The apparatus of claim 1, wherein:

the first information collection unit collects the first sensed data using a greatest one of the sensed values, varying while the vehicle was passing the first sensor unit, as the first reference sampled data; and

the second information collection unit collects the second sensed data using a greatest one of the sensed values, varying while the vehicle was passing the second sensor unit, as the second reference sampled data.

5. The apparatus of claim 1, wherein the first information collection unit, the second information collection unit and the comparison and analysis unit performs:

a first technique that extracts times at which the vehicle entered the first sensor unit and the second sensor unit as the first time and the second time, respectively, and calculates the vehicle'"'"'s average speed,

a second technique that extracts times at which the vehicle exited from the first sensor unit and the second sensor unit as the first time and the second time, respectively, and calculates the vehicle'"'"'s average speed, and

a third technique that extracts times at which greatest sensed values caused by the vehicle were detected by the first sensor unit and the second sensor unit as the first time and the second time, respectively, and calculates the vehicle'"'"'s average speed; and

the computation unit calculates the vehicle'"'"'s final average speed by comparing similarities among the vehicle'"'"'s average speeds calculated by the first, second and the third techniques.

6. The apparatus of claim 5, wherein the computation unit calculates an average of the vehicle'"'"'s two remaining average speeds, obtained by excluding a most different one from the vehicle'"'"'s average speeds calculated by the first, second and third techniques, as the vehicle'"'"'s final average speed.

7. A method of generating traffic information, comprising:

collecting first sensed data, including first reference sampled data related to detection of information about a vehicle and a plurality of pieces of first surrounding sampled data obtained before and after the first reference sampled data, from a first sensor unit that samples variations in geomagnetism at a first point of a traffic lane at predetermined intervals;

collecting second sensed data, including second reference sampled data related to detection of information about the vehicle and a plurality of pieces of second surrounding sampled data obtained before and after the second reference sampled data, from a second sensor unit that samples variations in geomagnetism at a second point of the traffic lane at predetermined intervals;

extracting a first time at which the vehicle passed the first sensor unit from the first sensed data;

determining similarity between the first sensed data and the second sensed data by comparing them with each other, and extracting a second time at which the vehicle passed the second sensor unit, corresponding to the first time, from the second sensed data; and

calculating the vehicle'"'"'s average speed using information about the first time and the second time.

8. The method of claim 7, wherein:

the collecting first sensed data comprises collecting the first sensed data based on a section in which the vehicle had entered the first sensor unit;

the collecting second sensed data comprises collecting the second sensed data based on a section in which the vehicle had entered the second sensor unit;

the extracting first time comprises extracting a time at which the vehicle entered the first sensor unit as the first time; and

the extracting second time comprises extracting a time at which the vehicle entered the second sensor unit as the second time.

9. The method of claim 7, wherein:

the collecting first sensed data comprises collecting the first sensed data based on a section in which the vehicle had exited from the first sensor unit;

the collecting second sensed data comprises collecting the second sensed data based on a section in which the vehicle had exited from the second sensor unit;

the extracting first time comprises extracting a time at which the vehicle exited from the first sensor unit as the first time; and

the extracting second time comprises extracting a time at which the vehicle exited from the second sensor unit as the second time.

10. The method of claim 7, wherein:

the collecting first sensed data comprises collecting the first sensed data using a greatest one of the sensed values, varying while the vehicle was passing the first sensor unit, as the first reference sampled data; and

the collecting second sensed data comprises collecting the second sensed data using a greatest one of the sensed values, varying while the vehicle was passing the second sensor unit, as the second reference sampled data.

11. The method of claim 7, wherein the collecting first sensed data, the collecting second sensed data, the extracting first time, and the extracting second time are performed using:

a first technique that extracts times at which the vehicle entered the first sensor unit and the second sensor unit as the first time and the second time, respectively, and calculates the vehicle'"'"'s average speed,

a second technique that extracts times at which the vehicle exited from the first sensor unit and the second sensor unit as the first time and the second time, respectively, and calculates the vehicle'"'"'s average speed, and

a third technique that extracts times at which greatest sensed values caused by the vehicle were detected by the first sensor unit and the second sensor unit as the first time and the second time, respectively, and calculates the vehicle'"'"'s average speed; and

the calculating the vehicle'"'"'s average speed comprises calculating the vehicle'"'"'s final average speed by comparing similarities among the vehicle'"'"'s average speeds calculated by the first, second and the third techniques.

12. The method of claim 11, wherein the calculating the vehicle'"'"'s average speed comprises calculating an average of the vehicle'"'"'s two remaining average speeds, obtained by excluding a most different one from the vehicle'"'"'s average speeds calculated by the first, second and third techniques, as the vehicle'"'"'s final average speed.