45 results about "Translational velocity" patented technology

A sports simulator calculates the rotational and translational velocity of a sports object. The rotational velocity is calculated using image analysis. The translational velocity is calculated using image analysis and a set of emitters and sensors. The simulator then computes the future trajectory of the sports object based on the rotational and translational velocity. In one embodiment, the sports object is a golf ball and the sports simulator simulates golf.

An autonomous mobile body is configured to flexibly avoid obstacles. The mobile body has a movement mechanism configured to translate in a horizontal plane and rotate around a vertical axis, and the distance to an obstacle is derived for each directional angle using an obstacle sensor. A translational potential of the mobile body and a rotational potential of the mobile body for avoiding interference with the obstacle are generated, based on the distance from the autonomous mobile body to the obstacle at each directional angle. An amount of control relating to a translational direction and a translational velocity of the mobile body and an amount of control relating to a rotational direction and an angular velocity of the mobile body are generated based on the generated potentials, and the movement mechanism is driven.

A mapping module or path filtering module is arranged to identify admissible curved paths for which the vehicle is able to stop prior to reaching a detected obstacle in accordance with an observed translational velocity and an observed rotational velocity. A data processor determines a respective objective function for the candidate translational velocities and candidate rotational velocities associated with the admissible curved paths, where the objective function includes a curvature comparison term associated with the last curved path of the vehicle. A search engine or data processor selects preferential velocities, among the candidate translational velocities and candidate rotational velocities, with a superior value for its corresponding objective function. A path planning module or data processor determines the vehicular speed and trajectory for a path plan that avoids the obstacle consistent with the selected preferential velocities.

Steering logic for a self-propelled vehicle having a plurality of wheels includes the steps of receiving translational velocity and angular velocity commands, determining the resultant velocity and steer angle of each wheel, and determining the wheel offset correction for each wheel based on the scrub radius of each wheel and the angular velocity command.

A mapping module or path filtering module is arranged to identify admissible curved paths for which the vehicle is able to stop prior to reaching a detected obstacle in accordance with an observed translational velocity and an observed rotational velocity. A data processor determines a respective objective function for the candidate translational velocities and candidate rotational velocities associated with the admissible curved paths, where the objective function includes a curvature comparison term associated with the last curved path of the vehicle. A search engine or data processor selects preferential velocities, among the candidate translational velocities and candidate rotational velocities, with a superior value for its corresponding objective function. A path planning module or data processor determines the vehicular speed and trajectory for a path plan that avoids the obstacle consistent with the selected preferential velocities.

At the time of occurrence of camera shake, an angular velocity sensor detects an angular velocity. A rotation angle calculator integrates the angular velocity to calculate angle camera shake. A translational acceleration calculator subtracts an internal acceleration caused during operation of a lens unit from a first translational acceleration detected by an acceleration sensor, so as to calculate a second translational acceleration. A translational velocity calculator integrates the second translational acceleration to calculate a translational velocity. A rotation radius calculator calculates a rotation radius based on the angular velocity and the translational velocity. A shake amount calculator calculates a camera shake amount based on the angle camera shake and the rotation radius. An actuator drives a camera shake correction lens in a direction for canceling the camera shake amount.

The invention pertains to a method and apparatus to separate and quantify particles using time-variable force fields. The force fields can be for dielectrophoresis (positive or negative), electrophoresis or electrohydrodinamic. In a first aspect of the method, the fields are translated and / or modified in space at a speed substantially comparable to the speed of translation of the fastest particles in the sample so that only these follow by changing position, while the slowest particles are not affected.According to the invention the translation and / or modification of the force field can also occur with varying speed, which is especially useful when this happens with periodic law on a field with spatial periodicity. In one aspect of the method, a force field with spatial periodicity is translated and / or modified in a first direction at high speed, for such a period of time as to cause a movement equal to the spatial period of the field, and at low speed in a second direction, opposite to the first one, for such a period of time as to cancel the overall movement of the field, causing the translation of the slowest particles in the second direction and no movement of the fastest particles.In an additional aspect of the method, the field is translated and / or modified in a first direction at high speed, for such a period of time as to cause a movement equal to the spatial period of the field minus a quantity corresponding to the period of the electrodes generating it, causing the translation of the fastest particles in the first direction and of the slowest particles in the opposite direction.In another aspect of the method, the quantity or size of the particles is determined by an indirect measurement of the speed of movement after varying the force field by means of a relationship between the speed of movement and the volume of the particles.This invention also pertains to an apparatus to produce appropriate field configurations that are necessary for the selective movement of particles

A sports simulator calculates the rotational and translational velocity of a sports object. The rotational velocity is calculated using image analysis. The translational velocity is calculated using image analysis and a set of emitters and sensors. The simulator then computes the future trajectory of the sports object based on the rotational and translational velocity. In one embodiment, the sports object is a golf ball and the sports simulator simulates golf.

An autonomous mobile body is configured to flexibly avoid obstacles. The mobile body has a movement mechanism configured to translate in a horizontal plane and rotate around a vertical axis, and the distance to an obstacle is derived for each directional angle using an obstacle sensor. A translational potential of the mobile body and a rotational potential of the mobile body for avoiding interference with the obstacle are generated, based on the distance from the autonomous mobile body to the obstacle at each directional angle. An amount of control relating to a translational direction and a translational velocity of the mobile body and an amount of control relating to a rotational direction and an angular velocity of the mobile body are generated based on the generated potentials, and the movement mechanism is driven.

At the time of occurrence of camera shake, an angular velocity sensor detects an angular velocity. A rotation angle calculator integrates the angular velocity to calculate angle camera shake. A translational acceleration calculator subtracts an internal acceleration caused during operation of a lens unit from a first translational acceleration detected by an acceleration sensor, so as to calculate a second translational acceleration. A translational velocity calculator integrates the second translational acceleration to calculate a translational velocity. A rotation radius calculator calculates a rotation radius based on the angular velocity and the translational velocity. A shake amount calculator calculates a camera shake amount based on the angle camera shake and the rotation radius. An actuator drives a camera shake correction lens in a direction for canceling the camera shake amount.

The invention provides an electrically movable vehicle drivable by a simplified mode of control and a control program for driving the vehicle. A normalized value Y′ representing translation motion and a normalized value X′ representing turning motion are fed from a command value input unit 110 to a velocity command value calculating unit 120. The calculating unit 120 determines a translation velocity command value Vg<sub2>—< / sub2>trg based on the normalized value Y′. The calculating unit 120 determines a turn angular velocity command value ωf<sub2>—< / sub2>trg that will always satisfy Expression (2–4) for preventing the vehicle from falling down. The translation velocity command value Vg<sub2>—< / sub2>trg and the turn angular velocity command value ωf<sub2>—< / sub2>trg determined by the unit 120 are fed to a control command value calculating unit 130, which calculates control command values for left and right drive wheels. The control command values are fed to a motor control unit 140 to control motors Mr, Ml and control the drive wheels.

The invention provides an undersampling based high-speed movement target micro-doppler parameter estimation method. The undersampling technology is introduced aiming at radar micro-doppler signals of high-speed movement targets. Radar micro-doppler echo signals are narrow-band signals with large center frequency values and a high sampling frequency is required when a traditional nyquist sampling frequency is used to sample the signals. But according to the undersampling theorem, the signals are sampled with the sampling frequency which is 2 times higher than that of a micro-doppler signal bandwidth and much smaller than the nyquist sampling frequency. According to the undersampling technology, target translational velocity information is saved, the signal sampling data size is greatly reduced, later computing costs and requirements for hardware equipment are lowered, meanwhile target tender moving information is remained, then time frequency distribution processing is performed on the sampling data, and time frequency characteristics of the echo signals can be obtained and tender moving parameter estimation of the targets can be performed.

The invention discloses a mobile circumferential scanning control device and control method, mobile circumferential scanning equipment, and an unmanned vehicle. The mobile circumferential scanning control device is used in the mobile circumferential scanning equipment. The mobile circumferential scanning equipment includes a mobile platform and scanning equipment fixedly arranged on the mobile platform. The smallest scanning distance of the scanning equipment is L1, and the largest scanning distance is L2. The mobile circumferential scanning control device includes a first control module usedfor making the scanning equipment carry out circumferential scanning at a set circumferential scanning angular velocity omega relative to the mobile platform, a second control module used for making the mobile platform translate at a set translational velocity v so as to drive the scanning equipment to translate at the translational velocity v, and a main control module used for associating and restraining the translational velocity v and the circumferential scanning angular velocity omega in such a way that the translational distance of the mobile platform is Delta L when the scanning equipment completes 360-degree circumferential scanning, wherein Delta L=L2-L1. Repeated scanning can be avoided. The running speed of the platform and the overall working efficiency can be improved while the effect of circumferential scanning is ensured.

A transducer for dynamic testing of specimen is disclosed. The transducer comprises at least two equally-spaced actuators, and a supporting block for supporting the at least two equally-spaced actuators and for mounting the transducer to the specimen. Each of the at least two equally-spaced actuators is an electrically powerable for providing to the specimen: a force or a moment. The actuators may be bimorphs and the transducer may be able to operate as an actuator, a sensor, and simultaneously as an actuator and a sensor. This may be for the transducer being able to operate as a sensor, for measurement of at least one selected from the group consisting of: an excitation force exerted on the specimen, an excitation moment exerts on the specimen, a resultant translational velocity of the specimen at an excitation point, and a rotational velocity of the specimen at the excitation point. The at least two equally-spaced actuators are able to produce a force on the specimen when electricity supplied to the at least two equally-spaced actuators is in phase, and a moment on the specimen when the electricity supplied to the at least two equally-spaced actuators is out of phase.

The present invention relates to a low-voltage weak field accelerated ion imaging type miniature photodecomposition fragment translational velocity spectrometer. The low-voltage weak field accelerated ion imaging type miniature photodecomposition fragment translational velocity spectrometer comprises a source chamber, a reaction chamber, a vacuum pump, a pulse valve, a collimator, a photodecomposition laser, an ionization laser, a low-voltage weak field ion acceleration and focusing system, a microchannel board, a fluorescent screen, a data acquisition system, a sequential control system and a computer. The miniature photodecomposition fragment translational velocity spectrometer of the application innovatively uses a weak electric field (10-30 V / cm) to accelerate the ions and focuses the ions simultaneously, and an ion flight total distance is only about 12 cm. The miniature photodecomposition fragment translational velocity spectrometer of the present invention adopts the low-voltage weak field, so that a short shaft of an ion swing ball of a stationary state can reach the larger time difference, thereby being very conducive to a subsequent time slice operation. The miniature photodecomposition fragment translational velocity spectrometer of the application has the better performances, such as the resolution, etc., than the currently universal majority of ion imaging type photodecomposition fragment translational energy spectrometers of strong electric field (100-350 V / cm) acceleration and long-distance (38-105 cm) flight, and can provide the more accurate, simpler, more convenient and efficient experiment means for the photodecomposition dynamics research.

The present invention is directed to a scanning apparatus and method for processing a workpiece, wherein the scanning apparatus comprises a wafer arm and moving arm fixedly coupled to one another, wherein the wafer arm and moving arm are operable to rotate about a first axis. An end effector, whereon the workpiece resides, is coupled to the wafer arm. A rotational shaft couples the wafer arm and moving arm to a first actuator, wherein the first actuator provides a rotational force to the shaft. A momentum balance mechanism is coupled to the shaft and is operable to generally reverse the rotational direction of the shaft. The momentum balance mechanism comprises one or more fixed spring elements operable to provide a force to a moving spring element coupled to the moving arm. A controller is further operable to maintain a generally constant translational velocity of the end effector within a predetermined scanning range.

The invention provides a geostrophic force effect based translational velocity or acceleration sensing device and structure, wherein a drive structure and an electromagnetic coil interact to drive a sensitive magnetic structure to rotate, when the sensing device has translational velocity meeting a condition of generating a geostrophic force effect, the sensitive magnetic structure generates deflection; a sensing mechanism converts the deflection displacement into an output electric signal. The invention innovatively applies a function sensitive material and a geostrophic effect to the translational velocity or acceleration detection, realizes a novel translation detection mechanism and method, and can be used for realizing a reciprocating translation detection means without detection stroke limitation.

The invention relates to a movable trolley for light ship welding, which is characterized by comprising a section of walking rail (10) laid on the ground, wherein a movable trolley is arranged on the rail (10); a driving device (7) is arranged on a trolley chassis (9) and is connected with one of wheel axles (11) through a transmission device; a pair of supporting frames (7) which is longitudinally arranged is arranged on the trolley chassis (9); a transversely arranged supporting shaft (1) is arranged on the supporting frames (7); a longitudinally arranged supporting plate (2) is arranged at two ends of the supporting shaft (1) respectively; and an upper outline of the supporting plate (2) has an arc-shaped structure connected by a plurality of lines, and can adapt to a ship body. The invention has the advantages that: a positive building method and a vertical welding process for the traditional ship body are changed, and due to the adoption of a reverse building method and a flat welding process, the reverse building method adapts to the flat welding process by adjusting the translational velocity (namely the moving speed of the ship body) of the movable trolley and welding process parameters (mainly a wire feed speed).