In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM2) between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, second vectors are estimated (ME, PM1) between an image with a second sub-sampling phase and an earlier image sub-sampled with a first subsampling phase, and the first and second vectors are combined (CD) to obtain output motion vectors (MV).

A device for producing reciprocating motion is provided and consists of a rotating weight that is forwardly driven along an elongated track to a suspended triangular frame track member thereby causing the triangular frame track member to move down and up in a vertical reciprocating motion which can then be transferred to an external member to perform useful work.

A motion vector for motion-compensated prediction in an inter-frame differential video coder is derived by comparing each block in a row of a current frame with the corresponding region, and positionally shifted regions, of a previous frame. The blocks are processed row by row, and scanned in a vertical column-by-column scan with each of the shifted regions. Two or more rows may be processed at a time. For .+-.7 pixel search, two or four comparison processors are provided, one (or one pair) proc...

A motion actuator comprises a cylindrical movable shaft and a stage that contains an expansible/contractible device and two clamps. The expansible/contractible device can be controlled to drive the axial motion of the movable shaft, and the two clamps can be controlled to grip/release the shaft. The two clamps and the expansible/contractible device are each controlled by a bimorph structure, which comprises a cut cylindrical piezoelectric tube section in a hole enclosed by a thin wall in the sta...

According to various illustrative embodiments, a motion-monitoring system comprises at least one antenna fixed within a barrier, the at least one antenna transmitting at least one first radio-frequency signal through the barrier to at least one volume outside the barrier, the at least one first radio-frequency signal reflecting from at least one object in the at least one volume to produce a plurality of second radio-frequency signals, which are received by the at least one antenna, at least one...

A system for tracking the motion of an object relative to a moving reference frame includes a first inertial sensor mounted on the tracked object; a second inertial sensor mounted on the moving reference frame; a third inertial sensor mounted on the moving reference frame and spaced apart from the second inertial sensor; and an element coupled to said first and second and third inertial sensors and configured to determine a position of the object relative to the moving reference frame based on t...

A motion simulator includes a stationary frame, a movable frame pivotally connected with the stationary frame, an operating chamber formed at a lower side of one end of the movable frame, a first actuator for pivoting the movable frame, and a second actuator arranged between the operating chamber and the movable frame, for rotating the operating chamber in forward and backward directions with respect to the movable frame.

A method of winding an electromagnetic coil creating a slot on the side of the winding, in order to allow a space for the plunger support to slide through the coil. Such an arrangement will permit the plunger to be permanently mounted, not movable and allow the coil to travel over the plunger and past it in either direction. Thus by installing a series of plungers and their supports aligned in a straight line, said coil(s) can be moved over the plunger or plungers by sequential energezation and ...

A pilot valve control for the drive motors of an excavator utilizes four pilot valves, each of which has a linear actuable plunger. A control body having a cam type member is mounted on a universal swiveling connection so that in a centered position none of the plungers are moved to actuate the respective valves, but upon tilting of the control body the plungers are actuated. A motion alarm actuator is connected to the control body and is associated with a normally closed switch so that in a cen...

In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM2) between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, second vectors are estimated (ME, PM1) between an image with a second sub-sampling phase and an earlier image sub-sampled with a first subsampling phase, and the first and second vectors are combined (CD) to obtain output motion vectors (MV).