7 results about "Constant angular velocity" patented technology

Various techniques for three-dimensional trajectory prediction of a stylus are described. An input device, such as a stylus, includes an integrated Inertial Measurement Unit (IMU) (e.g., 3-axis, 6-axis, 9-axis, . . . ) that generates IMU data that is used to predict a future location of the stylus (e.g., the pen tip) in relation to a surface, such as a display surface. The stylus transmits IMU data to a computing device to perform the trajectory prediction. The IMU data is analyzed (e.g., via a machine learning mechanism, or some other device / component) and a stylus state is determined to be in one of a constant velocity state, a constant acceleration state, a constant angular velocity and velocity state, or a constant angular velocity and acceleration state. A prediction model to perform the trajectory prediction can be selected based on the current state of the stylus.

Various techniques for three-dimensional trajectory prediction of a stylus are described. An input device, such as a stylus, includes an integrated Inertial Measurement Unit (IMU) (e.g., 3-axis, 6-axis, 9-axis, …) that generates IMU data that is used to predict a future location of the stylus (e.g., the pen tip) in relation to a surface, such as a display surface. The stylus transmits IMU data to a computing device to perform the trajectory prediction. The IMU data is analyzed (e.g., via a machine learning mechanism, or some other device / component) and a stylus state is determined to be in one of a constant velocity state, a constant acceleration state, a constant angular velocity and velocity state, or a constant angular velocity and acceleration state. A prediction model to perform the trajectory prediction can be selected based on the current state of the stylus.

Various techniques for three-dimensional trajectory prediction of a stylus are described. An input device, such as a stylus, includes an integrated Inertial Measurement Unit (IMU) (e.g., 3-axis, 6-axis, 9-axis, . . . ) that generates IMU data that is used to predict a future location of the stylus (e.g., the pen tip) in relation to a surface, such as a display surface. The stylus transmits IMU data to a computing device to perform the trajectory prediction. The IMU data is analyzed (e.g., via a machine learning mechanism, or some other device / component) and a stylus state is determined to be in one of a constant velocity state, a constant acceleration state, a constant angular velocity and velocity state, or a constant angular velocity and acceleration state. A prediction model to perform the trajectory prediction can be selected based on the current state of the stylus.

The utility model provides a zipper torsional resistance moment test fixture, which comprises a puller clamping assembly, a pull tab clamping assembly, a bearing support, a torsion rotating shaft, a torsion rotating wheel and a connecting chain, and is characterized in that the puller clamping assembly and the bearing support are fixedly arranged on a fixed base of a universal tension tester; the pull head clamping assembly and the pull piece clamping assembly are fixedly connected with a transmission force arm of the universal tension testing machine through a connecting chain, so that after the pull head clamping assembly and the pull piece clamping assembly respectively clamp and fix a pull head of the tested zipper and a pull piece of the tested zipper, the transmission force arm of the universal tension testing machine is driven to pull the connecting chain at a constant linear speed; therefore, the torsion rotating wheel, the torsion rotating shaft and the pull piece clamping assembly synchronously rotate at a constant angular speed, the pull piece of the zipper is tested in a torsion mode, the zipper torsion resistance moment testing clamp can meet the testability requirement by being matched with a universal tension testing machine, and it is not needed to additionally configure a torque testing instrument, so that the testing cost is increased.

The invention discloses a low-rotating-speed swing table device for verifying the gyroscopic effect of a cold atom gyroscope. The low-rotating-speed swing table device comprises a vibration isolation platform, a first voice coil motor, a second voice coil motor, a probe supporting piece, a first voice coil motor supporting piece, a second voice coil motor supporting piece, a voice coil motor driving system, an inclinometer and a control system, the probe supporting piece is in a flat plate shape, a cold atom gyroscope probe is arranged on the probe supporting piece, and the probe supporting piece is placed on the vibration isolation platform; the two ends of the probe supporting piece extend out of the vibration isolation platform, and a first voice coil motor and a second voice coil motor are symmetrically arranged at the two ends of the bottom face of the probe supporting piece. And the movement direction of the output shaft of the first voice coil motor is opposite to that of the output shaft of the second voice coil motor, so that the probe swings. The swing table device swings at a constant speed in a small range, has a vibration isolation effect, and provides a small and constant angular velocity for verifying a gyroscopic effect. The device can verify the gyroscopic effect of the cold atom gyroscope, and has the advantages of high stability, fast response, vibration isolation and the like.

A light scanning apparatus satisfies the following conditions: 0.60≤(dYmax− / dθ) / (dY0 / dθ)≤0.98; and 0.50<Sk / ft<1.00, where, when a deflecting unit rotates at a constant angular velocity, θ represents a scanning angle between a principal ray of a light flux immediately after deflected by the deflecting unit and an optical axis of an imaging optical system, Y0 represents an on-axis image height, Ymax− represents a first outermost off-axis image height on a side opposite to a light source with respect to the optical axis of the imaging optical system in a main scanning cross section, ft represents a focal distance of the imaging optical system in the main scanning cross section, and Sk represents a distance between a rear-side principal plane of the imaging optical system and a scanned surface on an optical path of a principal ray of the light flux that travels to the on-axis image height.

The present application relates to the technical field of compression test, and discloses a vibration water tightness test equipment and method for building waste recycled fine aggregate, which comprises a base and a hydraulic control system. Through the linkage structure of the inserted sleeve, the pressure arm and the limiting seat, the pressure rod is gradually moved to the rotation center of the rocker arm during the constant angular velocity deflection of the rocker arm, the length of the pressure arm is continuously shortened, the continuous decrease of the displacement and the moving speed is realized under the same rotation angle, the gradual pressure effect of the rapid settlement in the early stage and the slow pressure stabilization in the later stage is formed, and the pressure pressure can be simultaneously and adaptively increased according to the change rule of the continuously increased resistance and stiffness of the test piece during the compression process. The nonlinear deformation rule of the recycled fine aggregate test piece, that is, the large initial pore, the fast settlement, the small resistance in the early stage, and the particle embedding and compacting, the sudden increase of the hardness and the resistance in the later stage, is adapted, and the detection authenticity and accuracy of the core parameters such as the ultimate compressive strength, the steady creep and the settlement deformation are greatly improved.