An output shaft of a transmission is fixed to a planetary gearset carrier. Output torque is measured via a surface acoustic wave sensor affixed to a face of the carrier between two adjacent planet gears and radially inside a weld joining the carrier face to an opposite carrier face. In this location, the level of strain at typical transmission output torques produces a level of strain within the measuring range of a surface acoustic wave sensor. The sensor may be powered and signals communicated across an air gap defined by signal rings. Due the stable position and orientation of the carrier, a small, consistent air gap is possible.

A torque transmission apparatus incorporates a differential gear system and a stationary sensor connected to the differential gear system for measuring output torque. The stationary sensor may be connected to a measurement output element of the differential gear system by a torsionally compliant measurement member, wherein the stationary sensor measures torsional deformation of the measurement member. The torsional deformation may be measured directly, or it may be measured following amplification by a gear train. A rotary position sensor may be used as the stationary sensor. Alternatively, the stationary sensor may be connected to the measurement output element of the differential gear system by way of a rigid measurement member, wherein the stationary sensor measures force applied by the measurement member. In this alternative, a force sensor may be used as the stationary sensor.

A method having the steps of measuring a geometry of a toothing using an optical measuring system, wherein a numerical aperture of the optical measuring system is adjustable and the numerical aperture of the optical measuring system is adapted depending on at least one geometric parameter of the toothing to be measured and/or is enlarged or reduced.

A method having the steps of measuring a geometry of a toothing using an optical measuring system, wherein a numerical aperture of the optical measuring system is adjustable and the numerical aperture of the optical measuring system is adapted depending on at least one geometric parameter of the toothing to be measured and/or is enlarged or reduced.

A gear train mechanical operation experimental instrument is provided, which includes a detection table, a driving motor, an auxiliary gear, a support block, a second support column, a detection assembly, and a controller. The controller includes a driving control module, a data acquisition module, and an evaluation module. The controller makes a primary judgment on the quality of the gear to be detected, and a secondary judgment on whether there is friction abnormality in the gear to be detected. Based on the results of the primary judgment and the secondary judgment, the final judgment result is determined and displayed. The method of comprehensively considering multiple parameters helps to more accurately evaluate the status and quality of gears, not only allowing to perform evaluation on the real-time performance of the gear, but also detecting potential problems or abnormal situations, which helps to detect and solve problems early.

A gear train mechanical operation experimental instrument is provided, which includes a detection table, a driving motor, an auxiliary gear, a support block, a second support column, a detection assembly, and a controller. The controller includes a driving control module, a data acquisition module, and an evaluation module. The controller makes a primary judgment on the quality of the gear to be detected, and a secondary judgment on whether there is friction abnormality in the gear to be detected. Based on the results of the primary judgment and the secondary judgment, the final judgment result is determined and displayed. The method of comprehensively considering multiple parameters helps to more accurately evaluate the status and quality of gears, not only allowing to perform evaluation on the real-time performance of the gear, but also detecting potential problems or abnormal situations, which helps to detect and solve problems early.

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.

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.

An inspection method for a speed variator including a first gear and a second gear includes obtaining a first position of the first gear based on a contact between a first gear tooth of the first gear and a third gear tooth of the second gear, driving the first gear to rotate in a first direction to bring a second gear tooth of the first gear into contact with the third gear tooth, obtaining a second position of the first gear based on a contact between the second gear tooth and the third gear tooth, and determining a condition of the speed variator based on the first position and the second position. Also, an inspection device is provided.

An inspection method for a speed variator including a first gear and a second gear includes obtaining a first position of the first gear based on a contact between a first gear tooth of the first gear and a third gear tooth of the second gear, driving the first gear to rotate in a first direction to bring a second gear tooth of the first gear into contact with the third gear tooth, obtaining a second position of the first gear based on a contact between the second gear tooth and the third gear tooth, and determining a condition of the speed variator based on the first position and the second position. Also, an inspection device is provided.