Sensor mounting system

• US 6,720,884 B2
• Filed: 12/20/2001
• Issued: 04/13/2004
• Est. Priority Date: 12/20/2000
• Status: Expired due to Fees

• Current Assignee: Prospects Corp.
• Original Assignee: Prospects Corp.
• Inventors: Davis, James D. Jr., OʼConnor, Christopher J.
• Primary Examiner(s): Lee, Benjamin C.
• Application Number:
  US10/029,062
• Publication Number:
  US 20020101694A1
• Time in Patent Office: 845 Days
• Field of Search: 340/693.5, 340/540, 340/903, 340/435, 340/436, 340/693.6, 340/693.9, 340/552, 318/480, 318/264, 318/283, 318/445, 180/271, 49/28, 172/6, 342/27, 342/61, 342/70, 342/72, 342/175, 342/69, 250/221, 250/239, 356/3, 701/36, 701/45, 361/679, 361/728, 361/807
• US Class Current: 340/693.6
• CPC Class Codes: B60R 11/02 for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
• CPC Class Codes: B60R 2011/0021 Doors
• CPC Class Codes: G01P 13/00 Indicating or recording presence, absence, or direction, of movement electric switches H01H; counting moving objects G06M7/00
• CPC Class Codes: G01S 17/04 Systems determining the presence of a target
• CPC Class Codes: G01S 17/88 Lidar systems specially adapted for specific applications
• CPC Class Codes: G01S 7/4813 Housing arrangements
• CPC Class Codes: G01S 7/4972 Alignment of sensor

Abstract

An obstacle detection system for vehicular environments including a monitoring sensor system and a mounting system is disclosed. An installer can make aiming adjustments, in the factory or field, to account for tolerance stack-up. The system includes a housing for mounting the monitoring sensor system to minimize cross-talk and interference between transmitter and receiver sections, to limit sensor system movement, and to enable gross and fine aiming adjustments. In one embodiment, a circuit board is disposed within a cradle assembly which, in turn, is mounted in or integral to the housing to position the obstacle detection sensor as necessary. The cradle in one embodiment is an enclosure for the circuit board. The sensor housing is mounted to the interior vehicle trim, door panel, and/or door sheet metal and ensures consistent mounting regardless of interior trim or factory installation variations. Integral adjustment mechanisms are incorporated for adjusting the orientation of the sensor system. The circuit board may be comprised of plural subsections interconnected by flexible circuit board, enabling accurate alignment of each subsection with respect to the environment to be monitored.

Claims

1. An obstacle detection system, comprising:

a monitor subsystem comprising

a housing,

at least one circuit board disposed in association with said housing,

an emitter element disposed on said at least one circuit board for generating an energy field,

a detector element disposed on said at least one circuit board for receiving at least a portion of said energy field, and

at least one lens for redirecting said energy field; and

a mounting subsystem comprising

at least one locating member,

a gross adjustment mechanism for enabling positioning of said at least one circuit board to a first degree of accuracy, and

a fine adjustment mechanism for enabling positioning of said at least one circuit board to a second degree of accuracy,

wherein said second degree of accuracy is greater than said first degree of accuracy.

2. The system of claim 1, wherein said emitter element and said detector element are disposed on an edge of said at least one circuit board.

3. The system of claim 1, wherein said at least one circuit board is comprised of plural rigid circuit boards mechanically connected by a flexible circuit board.

4. The system of claim 1, wherein said emitter element is comprised of plural discrete emitters, and wherein said detector element is comprised of plural discrete detectors.

5. The system of claim 1, wherein said housing comprises an energy barrier intermediate said emitter element and said detector element.

6. The system of claim 1, wherein said at least one lens comprises an emitter lens substantially proximate said emitter element and a detector lens substantially proximate said detector element.

7. The system of claim 1, wherein said emitter element is integral with said emitter lens.

8. The system of claim 1, wherein said detector element is integral with said detector lens.

9. The system of claim 1, wherein said at least one lens comprises at least one keyway for enabling accurate alignment of said at least one lens with respect to said at least one circuit board.

10. The system of claim 9, wherein said housing comprises a projection configured to mechanically interact with said at least one keyway to facilitate accurate installation of said at least one lens with respect to said housing.

11. The system of claim 1, further comprising a pivot point projecting from said housing and intermediate said housing and said at least one circuit board, wherein said fine adjustment mechanism enables said at least one circuit board to be oriented about said pivot point and relative to said housing.

12. The system of claim 11, wherein said fine adjustment mechanism comprises plural height-adjustable spacing members intermediate said at least one circuit board and said housing, whereby the distance between said at least one circuit board and said housing at each of said fine adjustment mechanisms is independently adjustable.

13. The system of claim 12, wherein each of said height-adjustable spacing members comprises a threaded fastener in threaded engagement with one of said at least one circuit board and said housing, whereby rotation of said threaded fastener in a first direction draws that portion of said at least one circuit board towards said housing, and whereby rotation of said threaded fastener in a second direction forces that portion of said at least one circuit board away from said housing.

14. The system of claim 12, wherein said height-adjustable spacing members each further comprise a resilient member for urging said housing and said at least one circuit board apart.

15. The system of claim 12, wherein said plural height-adjustable spacing members are radially distributed about said pivot point.

16. The system of claim 1, wherein said gross adjustment mechanism comprises plural, substantially parallel ribs, whereby said at least one circuit board is adapted for being disposed on one of said plural, substantially parallel ribs, whereby an angle of said at least one circuit board with respect to said housing is determined by which of said plural, substantially parallel ribs said at least one circuit board is disposed upon.

17. The system of claim 16, wherein said gross adjustment mechanism further comprises resilient members for urging said at least one circuit board against one of said plural, substantially parallel ribs.

18. The system of claim 1, wherein each of said at least one locating member comprises a projection extending from a surface of said housing opposite said at least one circuit board.

19. The system of claim 18, wherein said projection is substantially orthogonal to said surface of said housing.

20. The system of claim 18, wherein said projection comprises a substantially cylindrical post, said post having at least one groove disposed therein, said at least one groove being substantially parallel to said housing surface.

21. The system of claim 20, wherein said projection further comprises a plurality of frusto-conical projections extending in a mutually-spaced relationship substantially symmetric about said post.