SYSTEM AND METHOD FOR REMOTELY SENSING VISIBLE RAY TRANSMITTANCE OF VEHICLE WINDOW

• US 20160231243A1
• Filed: 09/10/2015
• Published: 08/11/2016
• Est. Priority Date: 02/06/2015
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: PARK, Mi-ryong, SHIN, Dongseung, KIM, Jong Deog
• Granted Patent: US 9,784,677 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01N 2021/1793 Remote sensing
• CPC Class Codes: G01N 21/59 Transmissivity G01N21/25 takes precedence
• CPC Class Codes: G01N 21/5911 of the scanning type scanning per se G02B
• CPC Class Codes: G01N 2201/06113 Coherent sources; lasers
• CPC Class Codes: G01N 2201/10 Scanning

Abstract

A vehicle window visible ray transmittance remote sensing system emits a plurality of laser beams to a driving vehicle, estimates transmittance of a window of the vehicle by acquiring a plurality of point data of a plurality of points from which a plurality of laser beams are reflected from a surface of the vehicle, and distinguishes a vehicle that deviates from a transmittance reference based on the estimated window transmittance.

Claims

1. A visible ray transmittance remote sensing system of a window of a driving vehicle, the visible ray transmittance remote sensing system comprising:

a plurality of laser scanners that emit a laser beam and that acquire a plurality of pieces of point data of a plurality of points when the laser beam is reflected from a surface of the vehicle; and

a signal processing controller that measures reflectivity of a window of the vehicle based on the plurality of pieces of point data and that estimates reflectivity of the window based on measured reflectivity of the window.

2. The visible ray transmittance remote sensing system of claim 1, wherein the signal processing controller distinguishes a vehicle that deviates from a transmittance reference based on transmittance of the window.

3. The visible ray transmittance remote sensing system of claim 1, further comprising a vehicle recognition unit that recognizes identification information of the vehicle,

wherein the signal processing controller stores the reflectivity and the transmittance of the window to correspond to identification information of the vehicle.

4. The visible ray transmittance remote sensing system of claim 3, further comprising an online information service unit that provides an online service based on the reflectivity of the window and the transmittance that is stored to correspond to identification information of the vehicle.

5. The visible ray transmittance remote sensing system of claim 1, wherein the plurality of laser scanners are respectively installed in facilities that are installed on a road.

6. The visible ray transmittance remote sensing system of claim 1, further comprising an environment sensor unit that detects environment information,

wherein the signal processing controller calculates a loss coefficient according to absorption and scattering of laser light in the atmosphere based on the environment information and corrects reflectivity of the window based on the loss coefficient.

7. The visible ray transmittance remote sensing system of claim 6, wherein the environment sensor unit comprises at least one detection sensor that detects at least one of temperature, humidity, rain, atmospheric pressure, and fine dust.

8. The visible ray transmittance remote sensing system of claim 6, wherein the signal processing controller operates the system in a dormant state and a non-dormant state based on the environment information.

9. The visible ray transmittance remote sensing system of claim 1, wherein the plurality of laser scanners comprise:

a front laser scanner that acquires point data of a front window of the vehicle;

a rear laser scanner that acquires point data of a rear window of the vehicle;

at least one left side laser scanner that acquires point data of a left side window of the vehicle; and

at least one right side laser scanner that acquires point data of a right side window of the vehicle.

10. The visible ray transmittance remote sensing system of claim 9, wherein at least one of left side laser scanners is installed at different heights, and at least one right side laser scanner is installed at different heights.

11. The visible ray transmittance remote sensing system of claim 1, wherein the plurality of laser scanners use red, green, and blue wavelength regions.

12. The visible ray transmittance remote sensing system of claim 1, wherein the signal processing controller determines transmittance of the window based on a predetermined loss coefficient of the window based on reflectivity of the window and visible ray loss rate information of the window.

13. The visible ray transmittance remote sensing system of claim 1, wherein the signal processing controller measures reflectivity of the window using point data of a point at which signal intensity of a laser beam is a maximum among the plurality of point data.

14. A method in which a vehicle window visible ray transmittance remote sensing system senses a visible ray transmittance of a window of a driving vehicle, the method comprising:

emitting a plurality of laser beams;

acquiring a plurality of point data of a plurality of points in which the plurality of laser beams are reflected from a surface of the vehicle;

estimating reflectivity of the window based on the plurality of point data; and

distinguishing a vehicle that deviates from a transmittance reference based on a transmittance of the window.

15. The method of claim 14, further comprising:

recognizing identification information of the vehicle;

storing reflectivity and transmittance of the window that is measured from the vehicle to correspond to identification information of the vehicle; and

providing an online service based on the reflectivity and the transmittance of the vehicle that is stored to correspond to identification information of the vehicle.

16. The method of claim 14, wherein the estimating of reflectivity comprises:

measuring reflectivity of the window using point data of a point at which signal intensity of a laser beam is a maximum among the plurality of point data; and

calculating the transmittance based on reflectivity of a window of the vehicle.

17. The method of claim 16, further comprising determining an atmosphere state based on environment information,

wherein the estimating of reflectivity further comprises:

calculating a loss coefficient according to absorption and scattering of laser light based on the atmosphere state; and

correcting the measured reflectivity using the loss coefficient.

18. The method of claim 14, further comprising:

determining an atmosphere state based on environment information; and

controlling the vehicle window visible ray transmittance remote sensing system in a dormant state and a non-dormant state based on the atmosphere state.

19. The method of claim 14, wherein the emitting of a plurality of laser beams comprises:

emitting a plurality of laser beams from a front laser scanner to a front window of the vehicle;

emitting a plurality of laser beams from a rear laser scanner to a rear window of the vehicle;

emitting a plurality of laser beams from a left side laser scanner to a left side window of the vehicle; and

emitting a plurality of laser beams from a right side laser scanner to a right side window of the vehicle.