Infrared remote sensing device and system for checking vehicle brake condition

• US 5,942,753 A
• Filed: 03/12/1997
• Issued: 08/24/1999
• Est. Priority Date: 03/12/1997
• Status: Expired due to Term

• Current Assignee: Envirotest Corp. (Opus Group AB)
• Original Assignee: Remote Bonding Technology Company (Environmental Systems Products Incorporated)
• Inventors: Dell, William C.
• Primary Examiner(s): Westin, Edward P.
• Assistant Examiner(s): HANIG, RICHARD E
• Application Number:
  US08/819,696
• Time in Patent Office: 895 Days
• Field of Search: 250/338.1, 250/339.04, 250/339.14, 374/45, 374/121
• US Class Current: 250/338.1
• CPC Class Codes: F16D 2066/001 Temperature
• CPC Class Codes: G01L 5/28 for testing brakes

Abstract

An infrared remote sensing device and system for determining or allowing an inspector to determine whether a motor vehicle warrants an enhanced safety inspection to detect a defective or faulty brake system. The infrared remote sensing system includes a video recording device for recording the vehicle and providing video information, an infrared remote sensing device for detecting infrared energy from a plurality of brake drums of the vehicle and providing data, a power supply for providing power to the infrared remote sensing device, a computer for receiving the video information from the video recording device and the data from the infrared remote sensing device, the computer for performing analysis of the data from the infrared remote sensing device and providing analyzed data, a display device for displaying the video information and the analyzed data from the computer; wherein an inspector can view the video information and the analyzed data on the display device which indicates irregularities in heat patterns of the plurality of brake drums to determine the brake condition of the vehicle.

Claims

1. An infrared remote sensing system for use by an inspector in performing a preliminary inspection of a brake condition of a vehicle functioning under actual operating conditions comprising:

recording means for recording sufficient information to identify the vehicle functioning under actual operating conditions and providing information;

infrared remote sensing means having a plurality of predefined fields of view for detecting infrared energy from a plurality of brake drums of the vehicle functioning under actual operating conditions and providing data;

a power supply for providing power to the infrared remote sensing means;

a computer for receiving said information from said recording means and said data from said infrared remote sensing means, wherein said computer performs analysis of said data from said infrared remote sensing means and provides analyzed data; and

display means for displaying said information and said analyzed data from said computer, wherein the inspector can view said information to identify a particular vehicle and said analyzed data on said display means which indicates irregularities in heat patterns of the plurality of brake drums to determine whether the brake condition of the vehicle be subject to an enhanced safety inspection.

2. The infrared remote sensing system according to claim 1, wherein said infrared remote sensing means further comprises:

a plurality of infrared lenses, each of said plurality of infrared lenses having a respective viewing region;

a plurality of infrared detectors for detecting the infrared energy from said plurality of brake drums of the vehicle; and

a plurality of choppers positioned between said plurality of infrared lenses and said plurality of infrared detectors, respectively, for interrupting flow of the infrared energy from said plurality of infrared lenses to said plurality of infrared detectors.

3. The infrared remote sensing system according to claim 2, wherein said plurality of infrared lenses equals two lenses;

said plurality of choppers equals two choppers; and

said plurality of infrared detectors equals two detectors.

4. The infrared remote sensing system according to claim 3, wherein each viewing region of said two lenses is arranged opposite each other.

5. The infrared remote sensing system according to claim 3, wherein said two infrared detectors simultaneously detect the infrared energy from at least two of said plurality of brake drums of the vehicle.

6. The infrared remote sensing system according to claim 2, wherein said plurality of choppers are optical tuning fork choppers.

7. The infrared remote sensing system according to claim 1, wherein said display means comprises one monitor for simultaneously displaying said video information and said analyzed data.

8. An infrared remote sensing device for detecting a brake condition of a vehicle functioning under actual operating conditions comprising:

infared remote sensing means for detecting infared energy from a pularlity of brake drums of the vehicle functioning under actual operating conditions;

wherein said infrared remote sensing means includes;

a plurality of infrared lenses, said plurality of infrared lenses each having predefined fields of view;

a plurality of infrared detectors for detecting the infared energy from said plurality of brake drums of the vehicle functioning under actual operating conditions; and

a plurality of choppers positioned between said plurality of infrared lenses and said plurality of infrared detectors, respectively, for interrupting flow of the infrared lenses and said plurality of infrared lenses to said plurality of infrared detectors.

9. The infrared remote sensing device according to claim 8, wherein said plurality of infrared lenses equals two-lenses;

said plurality of choppers equals two choppers; and

said plurality of infrared detectors equals two detectors.

10. The infrared remote sensing device according to claim 9, wherein each viewing region of said two lenses is arranged opposite to each other.

11. The infrared remote sensing device according to claim 9, wherein said two infrared detectors simultaneously detect the infrared energy from at least two of said plurality of brake drums, respectively, of the vehicle.

12. The infrared remote sensing device according to claim 8, wherein said plurality of choppers are optical tuning fork choppers.

13. An infrared remote sensing system for performing an inspection of a brake condition of a vehicle functioning under actual operating conditions comprising:

recording means for recording sufficient information to identify the vehicle functioning under actual operating conditions and providing information about said vehicle;

remote sensing means having a plurality of predefined fields of view for detecting infrared energy from a plurality of brake drums of said vehicle functioning under actual operating conditions and providing data;

a computer for receiving and processing said information and said data; and

display means for displaying said processed information and said data.

14. The infrared remote sensing system of claim 13, wherein said remote sensing means are located at road level in the middle of a lane of roadway.

15. The infrared remote sensing system of claim 13, wherein said remote sensing means include at least two viewing regions.

16. The infrared remote sensing system of claim 13, wherein said remote sensing means detect the infrared energy from a plurality of brake drums simultaneously.

17. The infrared remote sensing system of claim 13, wherein said recorder means is a video recorder.

18. The infrared remote sensing system of claim 13, wherein said computer can store or transmit said information or data.

19. A method of remotely sensing the brake condition of a vehicle functioning under actual operating conditions using an infrared sensing means, a recorder, a computer, and a display, comprising the steps of:

detecting the infrared energy emitted from at least one brake drum of said vehicle functioning under actual operating conditions using at least one infrared lens having a predefined field of view;

providing data on said detected infrared energy to said computer;

recording information about said vehicle functioning under actual operating conditions, which information is sufficient to identify the vehicle and providing said information to said computer;

receiving and processing said data and said information by said computer; and

displaying said data and said information.

20. The method of claim 19, wherein said infrared sensing source is located at road level in the middle of a lane of roadway.

21. The method of claim 19, wherein said infrared sensing source detects the infrared energy emitted from at least two vehicle brake drums simultaneously.