51results about How to "Increase saliency" patented technology

In a minimally invasive surgical system, an image capture unit includes a prism assembly and sensor assembly. The prism assembly includes a beam splitter, while the sensor assembly includes coplanar image capture sensors. Each of the coplanar image capture sensors has a common front end optical structure, e.g., the optical structure distal to the image capture unit is the same for each of the sensors. A controller enhances images acquired by the coplanar image capture sensors. The enhanced images may include (a) visible images with enhanced feature definition, in which a particular feature in the scene is emphasized to the operator of minimally invasive surgical system; (b) images having increased image apparent resolution; (c) images having increased dynamic range; (d) images displayed in a way based on a pixel color component vector having three or more color components; and (e) images having extended depth of field.

In a minimally invasive surgical system, an image capture unit includes a prism assembly and sensor assembly. The prism assembly includes a beam splitter, while the sensor assembly includes coplanar image capture sensors. Each of the coplanar image capture sensors has a common front end optical structure, e.g., the optical structure distal to the image capture unit is the same for each of the sensors. A controller enhances images acquired by the coplanar image capture sensors. The enhanced images may include (a) visible images with enhanced feature definition, in which a particular feature in the scene is emphasized to the operator of minimally invasive surgical system; (b) images having increased image apparent resolution; (c) images having increased dynamic range; (d) images displayed in a way based on a pixel color component vector having three or more color components; and (e) images having extended depth of field.

In a minimally invasive surgical system, an image capture unit includes a prism assembly and sensor assembly. The prism assembly includes a beam splitter, while the sensor assembly includes coplanar image capture sensors. Each of the coplanar image capture sensors has a common front end optical structure, e.g., the optical structure distal to the image capture unit is the same for each of the sensors. A controller enhances images acquired by the coplanar image capture sensors. The enhanced images may include (a) visible images with enhanced feature definition, in which a particular feature in the scene is emphasized to the operator of minimally invasive surgical system; (b) images having increased image apparent resolution; (c) images having increased dynamic range; (d) images displayed in a way based on a pixel color component vector having three or more color components; and (e) images having extended depth of field.

In a minimally invasive surgical system, an image capture unit includes a prism assembly and sensor assembly. The prism assembly includes a beam splitter, while the sensor assembly includes coplanar image capture sensors. Each of the coplanar image capture sensors has a common front end optical structure, e.g., the optical structure distal to the image capture unit is the same for each of the sensors. A controller enhances images acquired by the coplanar image capture sensors. The enhanced images may include (a) visible images with enhanced feature definition, in which a particular feature in the scene is emphasized to the operator of minimally invasive surgical system; (b) images having increased image apparent resolution; (c) images having increased dynamic range; (d) images displayed in a way based on a pixel color component vector having three or more color components; and (e) images having extended depth of field.

Described is a system for identifying a concealed object of interest. The system is initialized by receiving an image in grayscale. The image is processed image to identify feature rich regions, which are identified as a binary mask describing edge pixels and non-edge pixels. A set of edge pixels are then randomly sampled. An object detector function is then used on the set of edge pixels to determine if an object of interest is present in the set of edge pixels.

The invention relates to a double-layer V-shaped built-in permanent magnet motor rotor for an electric automobile. Multiple groups of permanent magnet slots which are radially arranged in an inner layer and an outer layer are uniformly arranged on the iron core of the rotor at intervals along the circumferential direction; one or more V-shaped magnetized stripy magnetic steel is embedded in each permanent magnet slot. By virtue of the optimization of structures such as the angle of polar arc of inner-layer V-shaped magnetic steel, the included angle of outer-layer V-shaped magnetic steel, the width proportion of the inner-layer magnetic steel to the outer-layer V-shaped magnetic steel and the included angle of the outer-layer forcipated permanent magnet slot and the outer-layer magnetic steel, the air-gap flux density waveform is more approximate to the sinusoidal distribution, the harmonic component is reduced, the air-gap field waveform of the motor is improved, the fundamental wave frequency of spline torque fluctuation is improved, the spline fundamental wave and the ultraharmonics torque amplitude value are reduced, the torque fluctuation caused by splines is reduced, and the synthesis torque fluctuation of the motor is greatly reduced; and meanwhile, the reluctance torque is obviously increased, the salient pole rate and flux weakening speed expanding capability of the motor are improved, a constant-power speed range wider than that of a surface-mounted permanent magnet motor can be obtained, and the driving requirement of electric and hybrid automobiles can be met.

The invention discloses fractional-slot concentrated winding permanent magnet synchronous motor and a design method thereof for improving reluctance torque. The fractional-slot concentrated winding permanent magnet synchronous motor comprises a stator and a rotor, wherein the stator is slotted along the peripheral direction to form fault-tolerant teeth and armature teeth arranged alternately; an armature winding is wound on the armature teeth, the fault-tolerant teeth and the armature teeth are different in widths, and the widths of the armature teeth are wider than those of the fault-tolerantteeth; the rotor consists of a permanent magnet, a rotor core and a magnetic obstacle, the permanent magnet is a double-layer permanent magnet, the rotor core is composed of a plurality of independent units, and during machining, the rotor is wrapped with a non-metal material to form a compact structure. The rotor core is segmented along the axis pole direction of the permanent magnet, and the width of the upper part of the magnetic obstacle during segmentation is narrower than that of the lower part. The permanent magnet synchronous motor has the advantages that the direct-axis inductance can be reduced through the special magnetic obstacle design, the influence on quadrature axis inductance can also be reduced as much as possible, and the subharmonic of the motor is free of obvious inhibition. Therefore, the reluctance torque of the motor can be improved effectively, and the iron loss and eddy-current loss of the motor are reduced.

The invention relates to an embedded sine-profile permanent motor rotor which solves the problem that permanent magnets in traditional motors in the prior art are generally attached to the outer sides of rotors and prone to shed in high-speed rotation of the rotors and the problem of vibration noise caused by instability in operation of the motors due to fluctuation in rotation of the rotors in normal shapes. A winding shaft on the surface of the rotor is provided with a plurality of arc protrusions in consecutive connection, the rotor is partitioned into a plurality of equal areas by the ligature of the rotor axis and the crosspoint of each two adjacent protrusions, two grooves in inverted splayed array are arranged in each area, and permanent magnets are inserted in the grooves. The embedded sine-profile permanent motor rotor has the advantages that the separation of the permanent magnets in high-speed rotation of the rotor is avoided, and reliability of the motor is improved while the service life of the motor is prolonged; salient pole rate is increased, larger salient pole torques can be generated, efficiency is improved, and the service life of the motor is prolonged; and the motor is more stable in operation, loss caused by harmonic waves is reduced, and vibration noise of the motor is improved to some extent.

The invention provides an anti-flux leakage low-loss driving motor, which comprises a stator and a rotor, wherein the stator comprises a stator iron core and stator windings; the rotor comprises a rotor iron core and rotor magnetic steels; the stator iron core comprises an annular stator iron core yoke ring base body formed by non-oriented silicon steel laminations and multiple stator iron core tooth inserts formed by oriented silicon steel laminations; the rotor iron core comprises an annular rotor iron core base body formed by non-oriented silicon steel laminations and multiple rotor iron core inserts formed by oriented silicon steel laminations. The oriented silicon steel lamination with higher permeability is used for replacing the non-oriented silicon steel lamination in the rotor polarization direction, and a stator pole shoe also uses the oriented silicon steel lamination. Thus, in a large current condition, the saturation flux density is high, the loss is reduced, the driving motor efficiency is improved, and a large-torque low-loss driving motor is thus realized.

The invention discloses an embedded-permanent magnet reluctance type mixed magnetic pole type memory motor which comprises a stator, an armature winding, a mixed permanent magnet rotor and a rotatingshaft, the armature winding is arranged on the stator, the stator, the mixed permanent magnet rotor and the rotating shaft are sequentially arranged from outside to inside, and a plurality of pairs ofmagnetic poles are arranged on a rotor core of the mixed permanent magnet rotor in the circumferential direction. an N pole is a first linear embedded radially-magnetized permanent magnet, a S pole is a permanent magnet auxiliary synchronous reluctance type, two pairs of tangentially-magnetized second and third permanent magnets are arranged at the S pole to form a double-layer V-shaped permanentmagnet auxiliary synchronous reluctance type structure, the first permanent magnet is placed by an air gap, and the bottom of the V-shaped permanent magnet structure is close to the rotating shaft. The coercive force of the first permanent magnet is smaller than that of the second and third permanent magnets. A large design space is obtained through mixed magnetic pole design so as to improve theoutput torque and reduce the torque pulsation, the series magnetic circuit structure can ensure the stability of the working points of the permanent magnets, and meanwhile, the use amount of the permanent magnets is reduced.

The invention belongs to the field of motor design, and particularly relates to an armature winding design technology of a permanent magnet motor. Each phase of the windings provided by the inventionrealizes flexible armature magnetic field pole number change through the mutual offset effect of the coils wound on each tooth. According to the scheme, each coil is wound on a stator tooth, each phase winding is formed by connecting a plurality of coils wound on one tooth in series and in parallel according to a certain connection rule, and no matter how many rotor magnetic poles are, the windingcan always keep a single-tooth-winding centralized winding with the pitch of 1.

The invention provides a permanent magnet motor structure for cryogenic pumps, which belongs to the technical field of motor structure. The structure includes permanent magnets, auxiliary slots, magnetic isolation sleeves, starting cage bars, leaf-like holes, a shielding sleeve and air magnetic isolation slots. The permanent magnets are distributed in a 'T' shape, and are provided with the auxiliary slots filled with a non-magnetic material at the end. Each permanent magnet is provided with one magnetic isolation sleeve. The starting cage bars are symmetrically distributed at the edge of a rotor in an integrated three-bar way. The leaf-like holes are concentrically distributed on the rotor. The shielding sleeve is located between a stator and the rotor and is close to the stator. Accordingto the motor structure of the invention, the 'T'-type distribution of the permanent magnets improves the saliency ratio, the auxiliary slots at the end are filled with a non-magnetic material to reduce magnetic leakage and fix the permanent magnets, the magnetic isolation sleeves and the air magnetic isolation slots can reduce magnetic leakage, the starting cage bars can improve the starting torque and shorten the starting time, the leaf-like holes can reduce the inertia of the rotor, circulate the low-temperature medium and strengthen heat dissipation, and the shielding sleeve can prevent the medium from corroding the stator core and the windings.