Wind shear detection and alerting system
Patent 4725811 Issued on February 16, 1988. Estimated Expiration Date: 
February 13, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 13, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3126474 3618002 3748900 3814912 Excessive descent rate warning system for aircraft Apparatus for computing the acceleration of an aircraft along its flight path Wind shear warning system System for providing an indication of wind shear Aircraft pitch attitude signal generator Method and apparatus to overcome aircraft control problems due to wind shear InventorsApplicationNo. 06/829731 filed on 02/13/1986US Classes:340/968, Wind shear244/181, By change in pitch, angle of attack or flight path340/963, Flight alarm340/967, Attitude (including yaw, angle of attack, roll, pitch, glide slope)701/6, Angle of attack701/7, Air speed or velocity measurement701/9, Warning signal or alarm73/178TTake-off and landing monitorsExaminersPrimary: Rowland, James L.Assistant: Swarthout, Brent A. Attorney, Agent or FirmInternational ClassesG05D 1/06 (20060101)G05D 1/00 (20060101) AbstractA wind shear detection and alerting system (30) compares inertially derived accelerations with air speed rate to provide a wind shear warning signal. Inertially derived accelerations are used instead of purely inertial accelerations because purely inertial systems generally require a vertical gyro. By utilizing angle of attack () and flight path angle (γ) instead of pitch angle (θ) in the calculation, no vertical gyro signal is required and the system will be responsive to vertical as well as horizontal shear conditions. An enhanced version of the system is also compensated for roll angle ($c;), with the roll angle being derived from the rate of change of heading (Ψ) to avoid the need for a vertical gyro. The alerting system is capable of providing visual and aural warnings for a variety of wind shear conditions, such as, head shear, tail shear, head shear followed by tail shear and wind shear trend. The waring system is also capable of providing a wind shear warning which is a function of the radio altitude of the aircraft. | |
