# US 2018/0322239 A1 · Gearbox monitoring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0322239 A1 - Document ID: US20180322239A1 - Status: Published application - Kind: A1 - Application number: 15/971,143 - Filed: 2018-05-04 - Published: 2018-11-08 - Earliest claimed: 2017-05-04 - Assignees: Bently Nevada, LLC - Applicants: Bently Nevada, LLC - Inventors: Nicholas Ryan Aboumrad - Web page: https://patentgrep.com/patent/US20180322239A1 ## CPC - G01M 13/021: Gearings - G06F 30/17: Mechanical parametric or variational design - G06F 30/23: using finite element methods [FEM] or finite difference methods [FDM] - G06F 2111/10: Numerical modelling - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Gear motion of gearboxes can be calculated. A system includes a gear box, a sensor, and at least one data processor. The gear box includes a structure with a plurality of gears. The sensor is operatively coupled to the gear box and is configured to detect an operational parameter associated with a first gear of the gear box. The at least one data processor is configured to: receive, from the sensor, data characterizing the detected operational parameter associated with the gear box; generate a mesh pair matrix for the plurality of gears based on data characterizing the structure of the gear box; determine, from the mesh pair matrix, a calculated value of the operational parameter of the first gear of the plurality of gears; determine, based on the calculated value and the detected value of the operational parameter, an operational metric of the first gear; and provide the operational metric. ## Claims ### Claim 1 A system comprising: a gear box comprising a structure with a plurality of gears; a sensor operatively coupled to the gear box and configured to detect an operational parameter associated with a first gear of the gear box; and at least one data processor configured to: receive, from the sensor, data characterizing the detected operational parameter associated with the gear box; generate a mesh pair matrix for the plurality of gears based on data characterizing the structure of the gear box, the mesh pair matrix including a matrix representation of a system of linear equations representing kinematic relationships between gears of the plurality of gears; determine, from the mesh pair matrix, a calculated value of the operational parameter of the first gear of the plurality of gears; determine, based on the calculated value and the detected value of the operational parameter, an operational metric of the first gear; and provide the operational metric of the first gear. ### Claim 2 (depends on 1) The system of claim 1, wherein the processor is further configured to receive data characterizing a structure of the gear box. ### Claim 3 (depends on 3) The system of claim 3, wherein data characterizing the structure of the gear box includes a first number of teeth of the first gear, a second number of teeth of a second gear of the plurality of gears, and an orientation between the first number of teeth and the second number of teeth. ### Claim 4 (depends on 3) The system of claim 3, wherein the operational parameter includes an angular velocity of the first gear and the operational metric includes a fault frequency associated with the first gear. ### Claim 5 (depends on 4) The system of claim 4, wherein the processor is further configured to calculate a difference between the operational metric and a predetermined threshold. ### Claim 6 (depends on 5) The system of claim 5, wherein the processor is further configured to terminate operation of the gear box in response to determining that the operational metric exceeds a predetermined threshold. ### Claim 7 (depends on 1) The system of claim 1, wherein the processor is further configured to verify the received data characterizing the structure of the gear box based on a predetermined database associated with the gear box. ### Claim 8 A method comprising: receiving data characterizing structure of a gear box including a plurality of gears; generating a mesh pair matrix for the plurality of gears based on the received data characterizing the structure of the gear box; determining, from the mesh pair matrix, a calculated value of an operational parameter of a first gear of the plurality of gears; and providing the calculated value of the operational parameter. ### Claim 9 (depends on 8) The method of claim 8, wherein data characterizing the structure of the gear box includes a first number of teeth of the first gear, a second number of teeth of a second gear of the plurality of gears, and an orientation between the first number of teeth and the second number of teeth. ### Claim 10 (depends on 9) The method of claim 9, further comprising: receiving a detected value of the operational parameter from a sensor operatively coupled to the first gear; and determining, based on the calculated value and the detected value of the operational parameter, an operational metric of the first gear. ### Claim 11 (depends on 10) The method of claim 10, wherein the operational parameter is an angular velocity of the first gear and the operational metric a fault frequency associated with the first gear. ### Claim 12 (depends on 11) The method of claim 11, further comprising: calculating a difference between the operational metric and a predetermined threshold. ### Claim 13 (depends on 12) The method of claim 12, further comprising: terminating operation of the gear box in response to determining that the operational metric exceeds a predetermined threshold. ### Claim 14 (depends on 8) The method of claim 8, further comprising verifying the received data characterizing the structure of the gear box based on a predetermined database associated with the gear box. ### Claim 15 (depends on 8) The method of claim 8, wherein at least one of the receiving, the generating, the calculating, and the providing is performed by at least one data processor forming part of at least one computing system. ### Claim 16 A non-transitory machine-readable medium storing instructions that, when executed by at least one data processor, cause the at least one data processor to perform operations comprising: receiving data characterizing structure of a gear box including a plurality of gears; generating a mesh pair matrix for the plurality of gears based on the received data characterizing the structure of the gear box; determining, from the mesh pair matrix, a calculated value of an operational parameter of a first gear of the plurality of gears; and providing the calculated value of the operational parameter. ### Claim 17 (depends on 16) The non-transitory machine-readable medium of claim 16, wherein data characterizing the structure of the gear box includes a first number of teeth of the first gear, a second number of teeth of a second gear of the plurality of gears, and an orientation between the first number of teeth and the second number of teeth. ### Claim 18 (depends on 17) The non-transitory machine-readable medium of claim 17, the operations further comprising: receiving a detected value of the operational parameter from a sensor operatively coupled to the first gear; and determining, based on the calculated value and the detected value of the operational parameter, an operational metric of the first gear. ### Claim 19 (depends on 18) The non-transitory machine-readable medium of claim 18, wherein the operational parameter is an angular velocity of the first gear and the operational metric a fault frequency associated with the first gear. ### Claim 20 (depends on 19) The non-transitory machine-readable medium of claim 19, the operations further comprising: calculating a difference between the operational metric and a predetermined threshold; and terminating operation of the gear box in response to determining that the operational metric exceeds a predetermined threshold.