Vehicular Seatbelt Monitoring System and Process

• US 20090093932A1
• Filed: 10/03/2007
• Published: 04/09/2009
• Est. Priority Date: 10/03/2007
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Inventors: McCall, Clark E., Hallman, Lawrence M.
• Granted Patent: US 7,813,856 B2
• Time in Patent Office: Days
• US Class Current: 701/45
• CPC Class Codes: B60R 2021/01088 wireless
• CPC Class Codes: B60R 2022/4816 for sensing locking of buckle
• CPC Class Codes: B60R 2022/4866 Displaying or indicating arrangements thereof
• CPC Class Codes: B60R 22/48 Control systems, alarms, or interlock systems, for the correct application of the belt or harness

Abstract

A seatbelt monitoring system is provided for use onboard a vehicle having a seat assembly including at least one seat and corresponding seatbelt. The seatbelt monitoring system includes a wireless seatbelt status detector and a vehicle seatbelt status indicator. The wireless seatbelt status detector includes a seatbelt latch sensor, a first wireless transceiver, and a controller coupled to the seatbelt latch sensor and to the wireless sensor. The controller is configured to send a seatbelt latch signal via the first wireless transceiver when the seatbelt latch sensor indicates a change in seatbelt latch status. The vehicle seatbelt status indicator includes a second wireless transceiver and a processor coupled to the second wireless transceiver. The processor is configured to send a receipt signal to the wireless seatbelt status detector after receiving the seatbelt status signal via the second wireless transceiver.

Claims

1. A seatbelt monitoring system for use onboard a vehicle having a seat assembly including at least one seat and seatbelt, comprising:

a wireless seatbelt status detector, comprising;

a seatbelt latch sensor;

a first wireless transceiver; and

a controller coupled to the seatbelt latch sensor and to the first wireless transceiver, the controller configured to send a seatbelt latch signal via the first wireless transceiver when the seatbelt latch sensor indicates a change in latch status; and

a vehicle seatbelt status indicator, comprising;

a second wireless transceiver; and

a processor coupled to the second wireless transceiver, the processor configured to send a receipt signal to the wireless seatbelt status detector after receiving the seatbelt latch signal via the second wireless transceiver.

2. A seatbelt monitoring system according to claim 1 wherein the wireless seatbelt status detector further comprises a seat occupancy sensor coupled to the controller.

3. A seatbelt monitoring system according to claim 2 wherein the controller is further configured to send a seat occupancy signal via the first wireless transceiver when the seat occupancy sensor indicates a change in seat occupancy.

4. A seatbelt monitoring system according to claim 3 wherein the vehicle seatbelt status indicator further comprises an alert generator, and wherein the processor is configured to activate the alert generator when the seatbelt latch and seat occupancy signals indicate that the seatbelt is unlatched and that the seat is occupied, respectively.

5. A seatbelt monitoring system according to claim 1 wherein the controller is further configured to re-send the seatbelt latch signal if the receipt signal is not received within a predetermined time period.

6. A seatbelt monitoring system according to claim 5 wherein the controller is further configured to create an error log after a predetermined number of successive re-send attempts.

7. A seatbelt monitoring system according to claim 5 wherein the wireless seatbelt status detector further comprises an alert generator, and wherein the controller is further configured activate the alert generator after a predetermined number of successive re-send attempts.

8. A seatbelt monitoring system according to claim 7 wherein the seatbelt includes a seatbelt buckle, and wherein the alert generator comprises an light emitting diode disposed on the seatbelt buckle.

9. A seatbelt monitoring system according to claim 1 wherein the processor is further configured to send an update request signal to the wireless seatbelt status detector.

10. A seatbelt monitoring system according to claim 9 wherein vehicle seatbelt status indicator further comprises an ignition sensor, and wherein the processor is configured to send the update request when the ignition sensor indicates that the vehicle'"'"'s ignition has been activated.

11. A seatbelt monitoring system according to claim 9 wherein the processor is further configured to re-send the seatbelt latch signal if a response signal is not received from the wireless seatbelt status detector within a predetermined time period.

12. A seatbelt monitoring system according to claim 11 wherein vehicle seatbelt status indicator further comprises an alert generator, and wherein the processor is further configured to activate the alert generator after a predetermined number of successive re-send attempts.

13. A seatbelt monitoring system for use onboard a vehicle having a seat assembly including at least one seat and seatbelt having a latch, comprising:

a wireless seatbelt status detector, comprising;

a seatbelt latch sensor configured to monitor latch status;

a seat occupancy sensor configured to monitor seat occupancy;

a first wireless transceiver; and

a controller coupled to the seatbelt latch sensor, to the seat occupancy sensor, and the to wireless sensor, the controller configured to send a wireless message indicative of seatbelt latch status and of seat occupancy; and

a vehicle seatbelt status indicator, comprising;

a second wireless transceiver;

an alert generator; and

a processor coupled to the second wireless transceiver and to the alert generator, the processor configured to activate the alert generator when the wireless message indicates that the seat is occupied and that the seatbelt latch is unfastened.

14. A seatbelt monitoring system according to claim 13 wherein the processor is further configured to send a receipt signal after receiving the wireless message.

15. A method for wirelessly monitoring the status of a seatbelt associated with a seat in a vehicle, comprising:

sending at least one wireless signal indicative of seatbelt latch status and of seat occupancy;

receiving the wireless signal;

generating an alert if the wireless signal indicates that the seatbelt latch is unfastened and that the seat is occupied; and

sending a receipt signal indicating that the wireless signal has been received.

16. A method according to claim 15 further comprising re-sending the wireless signal if the receipt is not received within a predetermined time period.

17. A method according to claim 16 further comprising:

monitoring the number of successive re-send attempts; and

creating an error log if the number of successive re-send attempts exceeds a threshold value.

18. A method according to claim 17 further comprising generating an alert if the number of successive re-send attempts exceeds the threshold value.

19. A method according to claim 15 further comprising:

emitting an update request; and

re-sending the update request if a response signal is not received within a predetermined time period.

20. A method according to claim 19 further comprising:

monitoring the number of successive update request re-send attempts; and

generating an alert if the number of successive re-send attempts exceeds a threshold value.