Abstract: A three-dimensional (3D) print engine includes (A) a plurality of walls laterally defining a build chamber, (B) a build box including a build plate, (C) a powder dispenser, (D) a beam system for fusing layers of powder, (E) a peripheral plate disposed between the build plate and the plurality of walls and having an upper surface, (F) a gas inlet that ejects a gas flow stream that passes over the build plate and the peripheral plate, (G) a gas outlet that receives the gas flow stream, (H) a plurality of projecting structures mounted to and extending above the upper surface of the peripheral plate, and (I) a gas handling system coupled to the gas inlet and gas outlet. The plurality of projecting structures shape the flow field of the gas flow stream to provide a more uniform velocity of gas flow velocities above the build plane.

Abstract: Methods, systems, and devices for a functional cover are described. A removable cover (e.g., a functional cover) for a wearable ring device (e.g., a ring wearable) may include one or more electrical components positioned at least partially within the removable cover. The removable cover may further include a first electrical component exposed to an external surface of the removable cover, the first electrical component configured to contact (e.g., physical and electrically contact) a second electrical component of the wearable ring device, such as when the removable cover is in a mounted state on the wearable ring device. The first electrical component may be further configured to transfer electrical current, data, or both, between the one or more electrical components of the removable cover and one or more additional electrical components of the wearable ring device.

Abstract: Systems and devices for a ring wearable cover with deformable circumference are described. The removable cover for a wearable ring device may include a ring-shaped surface and one or more mechanical features integrated into the ring-shaped surface and configured to transition between an open state and a closed state. In the closed state, the ring-shaped surface may be configured to extend around a full circumference of the wearable ring device. In some cases, a diameter of the removable cover in the open state is greater than a diameter of the removable cover in the closed state, and the diameter of the removable cover in the closed state is sized to form an interference fit with a surface of the wearable ring device to lock the removable cover onto the wearable ring device when the removable cover is in the closed state.

Abstract: Methods, systems, and devices for a functional cover are described. A removable cover (e.g., a functional cover) for a wearable ring device (e.g., a ring wearable) may include one or more electrical components positioned at least partially within the removable cover. In some cases, the functional cover may wireless connect with the ring wearable. The removable cover may further include a first inductive component within the removable cover, where the first inductive component is configured to wirelessly communicate with a second inductive component of the wearable ring device when the removable cover is in a mounted state on the wearable ring device. The first inductive component of the removable cover may be configured to transfer electrical current, data, or both, between the one or more electrical components of the removable cover and one or more additional electrical components of the wearable ring device.

Abstract: Systems and devices for a ring wearable cover with non-deformable circumference are described. The removable cover for a wearable ring device may include a ring-shaped surface configured to extend around a full circumference of the wearable ring device when the removable cover is in a mounted state on the wearable ring device and one or more mounting features that are disposed on the ring-shaped surface. The one or more mounting features may be configured to interact with a surface of the wearable ring device to lock the removable cover onto the wearable ring device when the removable cover is in the mounted state on the wearable ring device. In some cases, a diameter of the removable cover is unchanged while the removable cover transitions from the mounted state on the wearable ring device to an unmounted state off of the wearable ring device.

Abstract: Methods, systems, and devices for wearable devices are described. A wearable device may include a first annular member forming the frame of the wearable device. The first annular member may include one or more deformable features that are configured to structurally weaken the frame of the wearable device and the one or more deformable features may be located along a portion of the frame. In some cases, the wearable device may include a first annular member and a second annular member to form a frame of the wearable device. The second annular member may include a non-metal material. The first annular member, the second annular member, or both, may include one or more deformable features that are configured to structurally weaken the frame of the wearable device and the one or more deformable features may be located along a portion of the frame.

Abstract: A 3D printing system includes a print engine, a powder dispenser, and a controller. The print engine includes a chassis defining an inner chamber with a docking chamber, a build box with a build plate, an energy beam system, and a powder track coater (PTC) coupled to a gantry. The controller is configured to: (A) operate the gantry and the PTC to selectively dispense a track of powder over the build plate, (B) operate the gantry to transport the PTC to the docking station, (C) operate the energy beam system to selectively fuse the track of powder, and (D) concurrent with operating the energy beam to (D1) measure a level of powder in the PTC and (D2) if the level of powder in the PTC is below a predetermined threshold, operate the powder dispenser to transfer a controlled volume of powder to the PTC.

Abstract: A three-dimensional (3D) print engine includes (A) a plurality of walls laterally defining a build chamber, (B) a build box including a build plate, (C) a powder dispenser, (D) a beam system for fusing layers of powder, (E) a peripheral plate disposed between the build plate and the plurality of walls and having an upper surface, (F) a gas inlet that ejects a gas flow stream that passes over the build plate and the peripheral plate, (G) a gas outlet that receives the gas flow stream, (H) a plurality of projecting structures mounted to and extending above the upper surface of the peripheral plate, and (I) a gas handling system coupled to the gas inlet and gas outlet. The plurality of projecting structures shape the flow field of the gas flow stream to provide a more uniform velocity of gas flow velocities above the build plane.

Abstract: A device and methods of using the device to provide timing and detection of the finish line for a sporting event are described. The device makes use of a Doppler radar transducer to detect the user as they approach and pass the finish line. In some embodiment the device further includes sensors that detect false starts and measure physiological parameters of the user during the event.

Abstract: A sensor system and method of using the system synergistically to improve the accuracy and usefulness of measured results is described. The system is comprised of electronically linked components that act as markers to trigger events, producers that gather data from sensors and aggregators that combine the data from a plurality of producers using triggers from marker devices to select the data of interest. The system is shown to be applicable to selection of data regions of interest and to analysis of the data to improve accuracy. The analysis of the data of any particular sensor within the system makes use of extrinsic data, being data generated by other sensors and intrinsic data, that is data or data limits that are known to be true from nature, laws of physics or just the particular information the user wants to acquire. The system is demonstrated on the analysis of Doppler radar measurements of a thrown object.

Abstract: A sensor system and method of using the system synergistically to improve the accuracy and usefulness of measured results is described. The system is comprised of electronically linked components that act as markers to trigger events, producers that gather data from sensors and aggregators that combine the data from a plurality of producers using triggers from marker devices to select the data of interest. The system is shown to be applicable to selection of data regions of interest and to analysis of the data to improve accuracy. The analysis of the data of any particular sensor within the system makes use of extrinsic data, being data generated by other sensors and intrinsic data, that is data or data limits that are known to be true from nature, laws of physics or just the particular information the user wants to acquire. The system is demonstrated on the analysis of Doppler radar measurements of a thrown object.

Abstract: A device and methods of using the device to provide timing and detection of the finish line for a sporting event are described. The device makes use of a Doppler radar transducer to detect the user as they approach and pass the finish line. In some embodiment the device further includes sensors that detect false starts and measure physiological parameters of the user during the event.

Abstract: A jump sensor device and methods of using the device to provide improved measurements of jump height, energy and power measurements of a jump or series of jumps is presented. The device can be used both as an assessment tool and a training aid. Variations are also presented that are applicable to movements in addition to a standing vertical jump.

Abstract: A sensor system and method of using the system synergistically to improve the accuracy and usefulness of measured results is described. The system is comprised of electronically linked components that act as markers to trigger events, producers that gather data from sensors and aggregators that combine the data from a plurality of producers using triggers from marker devices to select the data of interest. The system is shown to be applicable to selection of data regions of interest and to analysis of the data to improve accuracy. The analysis of the data of any particular sensor within the system makes use of extrinsic data, being data generated by other sensors and intrinsic data, that is data or data limits that are known to be true from nature, laws of physics or just the particular information the user wants to acquire. The system is demonstrated on the analysis of Doppler radar measurements of a thrown object.

Abstract: A calibration technique, for a printer having a plurality of different color ink printheads, which includes printing and scanning a test pattern. The test pattern is printed by each printhead printing a plurality of swaths having a length and distanced apart from each other. An optical sensor is used to scan the printed test pattern. Calibration is performed for each head by reading the swath length and the relative spacing of the swath and comparing the length to the spacing. This comparison is used to find the directional error for each head.