# US 9,751,636 B2 · Dynamic detection of landing gear deployment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,636 B2 - Document ID: US9751636B2 - Status: Granted - Kind: B2 - Application number: 14/969,020 - Filed: 2015-12-15 - Published: 2017-06-15 - Granted: 2017-09-05 - Earliest claimed: 2015-12-15 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: John R. Dangler; David T. Nelson - Web page: https://patentgrep.com/patent/US9751636B2 ## CPC - B64D 45/0005: {Devices specially adapted to indicate the position of a movable element of the aircraft, e.g. landing gear} - B64C 25/28: with indicating or warning devices - B64C 25/30: emergency actuated - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - B64C: AEROPLANES; HELICOPTERS ## Abstract The embodiments described herein relate to dynamically detecting landing gear deployment of an aerial vehicle. A set of flight measurements is dynamically generated and stored. The set of measurements may include altitude, distance to a destination, and airspeed. Each of these measurements is compared to a respective threshold value to produce a landing scenario indication. The comparison includes ascertaining that the vehicle is within a defined above ground level based on the altitude measurement, ascertaining that the vehicle is within a defined distance to a destination based on the distance to a destination measurement, and ascertaining that the airspeed measurement is below a maximum gear extension speed. The produced indication is converted into a landing gear protocol. ## Claims ### Claim 1 A method comprising: dynamically generating a set of flight measurements of an aerial vehicle, including dynamically obtaining an altitude measurement, a distance to a destination measurement, and an airspeed measurement; storing the generated set of flight measurements; comparing each flight measurement to a respective threshold value to produce a landing scenario indication, wherein the comparison comprises: ascertaining that the vehicle is within a defined above ground level based on the altitude measurement; ascertaining that the vehicle is within a defined distance to a destination based on the distance to a destination measurement; and ascertaining that the airspeed measurement is below a maximum gear extension speed; and converting the produced indication into a landing gear protocol. ### Claim 2 (depends on 1) The method of claim 1, further comprising implementing the landing gear protocol, including determining that landing gear of the vehicle is in an unsafe position. ### Claim 3 (depends on 2) The method of claim 2, further comprising activating a warning signal. ### Claim 4 (depends on 2) The method of claim 2, further comprising automatically deploying the landing gear. ### Claim 5 (depends on 1) The method of claim 1, further comprising constructing an altitude pattern based on a plurality of generated altitude measurements. ### Claim 6 (depends on 5) The method of claim 5, wherein the comparison further comprises ascertaining that the vehicle is descending from a cruising altitude based on the altitude pattern. ### Claim 7 (depends on 1) The method of claim 1, further comprising constructing an airspeed pattern based on a plurality of generated airspeed measurements, and deriving a historical airspeed trend based on the airspeed pattern, wherein the comparison further comprises ascertaining that the derived trend is indicative of an approach to land. ### Claim 8 A system comprising: a processing device in communication with memory; and one or more tools in communication with the processing device, the tools to: dynamically generate a set of flight measurements, including the functional unit to dynamically obtain an altitude measurement, a distance to a destination measurement, and an airspeed measurement of an aerial vehicle; store the generated flight measurements in memory; compare each flight measurement to a respective threshold value to produce a landing scenario indication, wherein the comparison comprises the functional unit to: ascertain that the vehicle is within a defined above ground level based on the altitude measurement; ascertain that the vehicle is within a defined distance to a destination based on the distance to a destination measurement; and ascertain that the airspeed measurement is below a maximum gear extension speed; and convert the produced indicated into a landing gear protocol. ### Claim 9 (depends on 8) The system of claim 8, wherein the tools comprise a microcontroller, the microcontroller to integrate the dynamically generated set, wherein the comparison is performed by the microcontroller. ### Claim 10 (depends on 9) The system of claim 9, further comprising the tools to construct an airspeed pattern based on a plurality of generated airspeed measurements, and derive a historical airspeed trend based on the airspeed pattern, wherein the comparison further comprises the tools to ascertain that the derived trend is indicative of an approach to land. ### Claim 11 (depends on 8) The system of claim 8, wherein the tools comprise a global positioning satellite (GPS) system, the GPS system to dynamically obtain the altitude measurement and the distance to destination measurement. ### Claim 12 (depends on 11) The system of claim 11, further comprising the GPS system to integrate the dynamically generated set, wherein the comparison is performed by the GPS system. ### Claim 13 (depends on 8) The system of claim 8, further comprising the tools to implement the landing gear protocol, including the tools to determine that landing gear of the vehicle is in an unsafe position. ### Claim 14 (depends on 13) The system of claim 13, further comprising the tools to activate a warning signal. ### Claim 15 (depends on 13) The system of claim 13, further comprising the tools to automatically deploy the landing gear. ### Claim 16 (depends on 8) The system of claim 8, further comprising the tools to construct an altitude pattern based on a plurality of generated altitude measurements, and ascertaining that the vehicle is descending from a cruising altitude based on the altitude pattern. ### Claim 17 A computer program product comprising a computer-readable storage device having computer-readable program code embodied therewith, the program code executable by a processor to: dynamically generate a set of flight measurements, including the functional unit to dynamically obtain an altitude measurement, a distance to a destination measurement, and an airspeed measurement of an aerial vehicle; store the generated flight measurements in the memory; compare each flight measurement to a respective threshold value to produce a landing scenario indication, wherein the comparison comprises program code to: ascertain that the vehicle is within a defined above ground level based on the altitude measurement; ascertain that the vehicle is within a defined distance to a destination based on the distance to a destination measurement; and ascertain that the airspeed measurement is below a maximum gear extension speed; and convert the produced indicated into a landing gear protocol. ### Claim 18 (depends on 17) The computer program product of claim 17, further comprising program code to implement the landing gear protocol, including program code to determine that landing gear of the vehicle is in an unsafe position. ### Claim 19 (depends on 18) The computer program product of claim 18, further comprising program code to activate a warning signal. ### Claim 20 (depends on 18) The computer program product of claim 18, further comprising program code to automatically deploy the landing gear.