AOS fan modulation systems

• US 5,860,674 A
• Filed: 04/15/1997
• Issued: 01/19/1999
• Est. Priority Date: 01/31/1997
• Status: Expired due to Term

• Current Assignee: Robert Bosch Corporation (Robert Bosch GmbH)
• Original Assignee: Robert Bosch Corporation (Robert Bosch GmbH)
• Inventors: Corrado, Anthony P.
• Primary Examiner(s): Ellis, Christopher P.
• Application Number:
  US08/839,726
• Time in Patent Office: 644 Days
• Field of Search: 280/735, 280/734, 307/10.1, 340/522, 180/271
• US Class Current: 280/735
• CPC Class Codes: B60H 1/00742 by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors
• CPC Class Codes: B60R 21/01534 using electromagneticwaves, e.g. infrared
• CPC Class Codes: B60R 21/01536 using ultrasonic waves

Abstract

Modulation and cutoff system for automotive interior fans/blowers which cuts off fan or closes shutters to stop or divert airflow during preselected Automotive Occupancy Sensor system operations so that the airflow does not interfere with, cause anomalies or short duration signal ambiguities in the US and IR sensor signal detection. The US sensor increases to a fast mode cycle upon receiving a crash imminent (CI) signal or upon detection of a Keep-Out Zone Intrusion (KOZI). Upon receipt of a CI or KOZI signal the fan/blower power is interrupted, slowed or the airstream is diverted. Alternately or additionally, the AOS system can be recalibrated for fan or air stream relative movement, the before/after fan interrupt US/IR signals can be compared, and a "fan-on" signal can be used to change AOS fusion processing coefficient, feature selections or matrix.

Claims

1. A method of airbag deployment control in an automotive occupancy sensor system which provides a processed signal to a passive restraint deployment system, which automotive occupancy sensor system has a plurality of sensors of which at least one is an ultrasound sensor, comprising the steps of:

(a) detecting an imminent or actual Keep Out Zone incursion; and

(b) providing a signal to a fan or blower power control means in response to said detected KOZI signal to modulate the operation of said fan or blower.

2. A method as in claim 1 wherein said KOZI signal detection includes sensing with an AOS system sensor.

3. A method as in claim 1 which includes the step of modulating includes cutting off fan or blower power in response to said interrupt signal.

4. A method of vehicle interior fan or blower control comprising the steps of:

(a) monitoring at least a portion of the interior occupant space of said vehicle with at least one sensor and generating at least one state signal;

(b) modulating said fan or blower power in response to said at least one signal.

5. A method as in claim 4 wherein said modulation includes cutting off or reducing fan or blower power to reduce interference or transients in signals received by said sensor.

6. A method as in claim 5 wherein said state signal is generated by a processor employing sensor fusion, and said fan modulation assists in calibration of said sensors or selection of values for a decision probability matrix.

7. A method of operation of an automotive occupant sensor system mounted in association with an automotive interior employing at least one sensor for receiving signals relating to the nature, location, or state of occupancy of at least a portion of said interior, comprising the steps of:

(a) detecting when a fan or blower associated with air flow in association with said interior is on and/or off; and

(b) modulating operation of said sensor to adjust for interference or transients created in said signals by air flow created by said fan or blower.

8. A method of operation of an automotive occupant sensor system mounted in association with an automotive interior employing at least one sensor for providing to a processor signals relating to the nature, location or occupancy of at least a portion of said interior, comprising the steps of:

(a) detecting when a window, door or moon roof is open and/or closed; and

(b) modulating the operation of said processor with respect to said sensor signals to account for interference or transients created in said signals by air flow created when said window, door or moon roof is opened.