NON-CONTACT SEAT POSITION SYSTEM

• US 20060231319A1
• Filed: 04/15/2005
• Published: 10/19/2006
• Est. Priority Date: 04/15/2005
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Maue, H. Winston, Goodman, Craig Gerald, Gauss, Scott Robert, Efendy, Lukman, Kawahara, Naoko, Parrott, Keith, Drew, Daniel, Geiger, Jeremy R., Thielen, Michael Paul, Wenc, Jonathan Lloyd, Petricca, Daryl Gerard
• Granted Patent: US 7,555,380 B2
• Time in Patent Office: Days
• US Class Current: 180/271
• CPC Class Codes: B60N 2/002 Seats provided with an occupancy detection means mounted therein or thereon detection means responsive to presence or absence of children B60N2/266
• CPC Class Codes: B60N 2/02246 Electric motors therefor
• CPC Class Codes: B60N 2/067 by linear actuators, e.g. linear screw mechanisms
• CPC Class Codes: B60N 2/0722 Constructive details

Abstract

A non-contact seat position system is provided. The system includes a lower seat track, an upper seat track, a target and a sensor. The upper seat track is positionably connected to the lower seat track, whereby the upper seat track may be positioned into a desirable location. The target is connected either to the lower seat track or the upper seat track, and the sensor is connected to the other of the lower seat track and the upper seat track. The sensor has a line of sight with the target, wherein the sensor when powered, outputs a sensor signal determined from a reflected signal coming from the target. In a first embodiment of the system, the sensor is an infrared sensor. In a second embodiment of the system the sensor is an optical sensor. A method of non-contact seat position system determination is also provided.

Claims

1. A non-contact seat position system comprising:

a lower seat track;

an upper seat track positionably coupled to said lower seat track;

a target coupled to one of said lower seat track and said upper seat track; and

a sensor coupled to the other of said lower seat track and said upper seat track, in line of sight of said target, wherein said sensor when powered outputs a sensor signal determined from a reflected signal from said target.

2. The non-contact seat position system in claim 1 further comprising a power source for powering said sensor and the system.

3. The non-contact seat position system in claim 2 further comprising a conditioning module for receiving said sensor signal, said conditioning module outputting a seat travel distance representative of said sensor signal received.

4. The non-contact seat position system in claim 2 further comprising a computer for receiving said sensor signal, said computer computing a seat travel distance representative of said sensor signal received.

5. The non-contact seat position system in claim 3 further comprising a computer for receiving said seat travel distance.

6. The non-contact seat position system in claim 1 wherein said sensor is an IR sensor.

7. The non-contact seat position system in claim 6 wherein said reflected signal received by said IR sensor is a sensor displacement distance signal, whereby a seat displacement distance may be determined from said sensor displacement distance signal.

8. The non-contact seat position system in claim 7 wherein one of said lower seat track and said upper seat track has a first seat stop and a second seat stop, wherein said upper seat track may reversibly travel a seat travel distance.

9. The non-contact seat position system in claim 8 wherein said IR sensor is coupled to said other of said lower seat track and said upper seat track at an offset target distance beyond one of said seat stops.

10. The non-contact seat position system in claim 9 wherein said offset target distance is nearly 10 centimeters, said seat travel distance ranges between zero and 22 centimeters, and said seat displacement distance ranges between nearly 10 centimeters and 32 centimeters.

11. The non-contact seat position system in claim 6 wherein said target has a target surface.

12. The non-contact seat position system in claim 11 wherein said target surface is a white target.

13. The non-contact seat position system in claim 6 further comprising a power source for powering said IR sensor and the system, a conditioning module for receiving said sensor signal, said conditioning module outputting a seat displacement distance signal representative of said sensor signal received, and a computer for receiving said seat displacement distance.

14. The non-contact seat position system in claim 13 wherein said conditioning module applies a distance characteristic function to the received sensor signal to obtain said seat displacement distance.

15. The non-contact seat position system in claim 6 further comprising a power source for powering said IR sensor and the system, and a computer for receiving said sensor signal, wherein said computer applies a distance characteristic function to the received sensor signal to obtain a seat displacement distance.

16. The non-contact seat position system in claim 1 wherein said sensor is an optical sensor.

17. The non-contact seat position system in claim 16 wherein said reflected signal received by said optical sensor is a track optical displacement signal, whereby a seat travel displacement may be determined from said track optical displacement signal.

18. The non-contact seat position system in claim 17 wherein said target is a strip, and one of said lower seat track and said upper seat track has a first seat stop and a second seat stop, wherein said upper seat track may reversibly travel a seat travel distance, wherein said track optical displacement signal is taken along an optical sensor view line substantially vertical to said strip.

19. The non-contact seat position system in claim 18 wherein said strip is a plurality of rectangles bounded between a reference line and a base line, said reference line being substantially parallel to said base line and separated by a reference distance, each of the plurality of rectangles forms a segment, each segment coupled to another segment along common non-bounded sides of each rectangle, each segment having a segment length between said non-bounded sides, wherein the sum of segment lengths equals a total length of said strip along said base line.

20. The non-contact seat position system in claim 19 wherein said segment length may vary for each of said plurality of rectangles, and at least one rectangle being slantwise partitioned forming a first zone and a second zone, wherein said optical sensor view line forms a first part in said first zone and a second part in said second zone, and the ratio of said first part to said second part increasingly or decreasingly changes along said segment length.

21. The non-contact seat position system in claim 20 wherein the slantwise partition is linear and the ratio of said first part to said second part is fifty percent at the beginning of a segment length increasing to one hundred percent at the end of a segment length for said rectangle.

22. The non-contact seat position system in claim 19 wherein at least one rectangle being diagonally partitioned forming a first zone and a second zone, wherein said optical sensor view line forms a first part in said first zone and a second part in said second zone, and the ratio of said first part to said second part increasingly or decreasingly changes along said segment length, whereby a seat travel displacement may be determined from said track optical displacement signal using said second zone and using the ratio of said first part to said second part adjusted by said segment length.

23. The non-contact seat position system in claim 22 wherein said first zone for each rectangle is white, and said second zone for each rectangle has a color, pattern, hue, shade, tint, tone, or determinative indication different from each of the other rectangles that form said strip.

24. The non-contact seat position system in claim 22 further comprising a power source for powering said optical sensor and the system, a conditioning module for receiving said sensor signal, said conditioning module outputting a seat travel displacement signal representative of said sensor signal received, and a computer for receiving said seat travel displacement.

25. The non-contact seat position system in claim 24 wherein said conditioning module applies an optical characteristic function to received said sensor signal to obtain said seat travel displacement.

26. The non-contact seat position system in claim 25 wherein said optical characteristic function is a lookup table using received said sensor signal to obtain said seat travel displacement.

27. The non-contact seat position system in claim 22 further comprising a power source for powering said optical sensor and the system, and a computer for receiving said sensor signal, wherein said computer applies an optical characteristic function to received said sensor signal to obtain a seat travel displacement.

28. A non-contact seat position system for a vehicle comprising:

a vehicle;

a lower seat track coupled to said vehicle;

a upper seat track positionably coupled to said lower seat track;

a target coupled to one of said lower seat track and said upper seat track; and

a sensor coupled to the other of said lower seat track and said upper seat track, in line of sight of said target, wherein said sensor when powered outputs a sensor signal determined from a reflected signal from said target.

29. The system for a vehicle of claim 28 wherein said sensor is an optical sensor and further comprises:

a power source for powering said optical sensor and the system;

a conditioning module for receiving said sensor signal, said conditioning module outputting a seat travel displacement signal representative of said sensor signal received; and

a computer for receiving said seat travel displacement,

wherein said reflected signal received by said optical sensor is a track optical displacement signal, whereby a seat travel displacement may be determined from said track optical displacement signal, wherein said target is a strip, and one of said lower seat track and said upper seat track has a first seat stop and a second seat stop, wherein said upper seat track may reversibly travel a seat travel distance, wherein said track optical displacement signal is taken along an optical sensor view line substantially vertical to said strip,

wherein said strip is a plurality of rectangles bounded between a reference line and a base line, said reference line being substantially parallel to said base line and separated by a reference distance, each of the plurality of rectangles forms a segment, each segment coupled to another segment along common non-bounded sides of each rectangle, each segment having a segment length between said non-bounded sides, wherein the sum of segment lengths equals a total length of said strip along said base line,

wherein each of the plurality of rectangle being diagonally partitioned forming a first zone and a second zone, wherein said optical sensor view line forms a first part in said first zone and a second part in said second zone, and the ratio of said first part to said second part increasingly or decreasingly changes along said segment length, whereby a seat travel displacement may be determined from said track optical displacement signal using said second zone and using the ratio of said first part to said second part multiplied by said segment length,

wherein said first zone for each rectangle is white, and said second zone for each rectangle has a color, pattern, hue, shade, tint, tone, or determinative indication different from each of the other rectangles that form said strip,

wherein said conditioning module applies an optical characteristic function to received said sensor signal to obtain said seat travel displacement.

30. A method of non-contact seat position system determination comprising:

providing a target coupled to one of a lower seat track and an upper seat track, said upper seat track is positionably coupled to said lower seat track;

providing a non-contact sensor coupled to the other of said lower seat track and said upper seat track;

powering said system;

receiving in said sensor a reflected signal from said target;

transmitting a sensor signal from said sensor;

receiving in a conditioning module or a computer said sensor signal; and

characterizing said sensor signal obtaining a seat travel position representative of the position of said upper seat track to said lower seat track.