3results about How to "High speed positioning" patented technology

The invention provides a short-stroke ultra-precision positioning platform capable of moving vertically, and belongs to the technical field of manufacturing of micro positioning structure devices. According to the novel Lorentz force motor, an air-gap magnetic field similar to a hyperbolic curve shape is generated through a four-quadrant permanent magnet array structural form of the rotor assembly, the effect of reducing electromagnetic thrust fluctuation is achieved, a controlled motor controls linear changes of current and electromagnetic thrust, the control difficulty of a positioning platform is reduced, and the positioning precision is improved; the novel magnetic bearing adopts an unequal-width Halbach stator structure, the capability of gathering magnetic lines towards the rotor permanent magnets is enhanced, the radial component of an air-gap magnetic field is improved, the suspension force of the magnetic bearing is further increased, and the rigidity of the suspension force is reduced by adopting unequal widths of the permanent magnets and increasing the axial air gaps between the axial and radial magnetizing permanent magnets. And the positioning precision and low-frequency vibration isolation performance of the positioning platform are improved. According to the invention, nano-scale positioning of the positioning platform in a millimeter-scale motion stroke under high speed and high acceleration can be realized.

This invention discloses a dual-motor harmonic reduction geared workbench, relating to the technical field of harmonic reduction transmission equipment. It includes a base and an outer motor housing. The top surface of the base is fixedly mounted to the outer motor housing. An upper housing is mounted on the top surface of the outer motor housing, and an output flange is rotatably mounted on the upper housing. A first driving component is installed inside the outer motor housing. A second driving component is installed inside both the outer motor housing and the upper housing. An output internal gear ring is rotatably mounted inside the upper housing, with its top surface fixedly mounted to the output flange. A flexible wheel is disposed inside both the outer motor housing and the upper housing. Through the coordinated operation of the two motors, high-speed rotation of the output flange can be achieved. Furthermore, through the independent operation of the second driving component, low-speed, high-torque output can be achieved based on the harmonic low-tooth-difference transmission principle. This allows the same equipment to be compatible with both high-speed light-load and low-speed heavy-load operating conditions, meeting the production needs of alternating complex on-site operations.

The invention relates to the technical field of nondestructive testing of fatigue cracks of large-span steel bridges, in particular to an intelligent scanning robot for fatigue cracks of weld joints of large-span steel bridge decks. The TMR phased array detection module comprises a ferrite magnetic core, an excitation coil and a sensor array probe composed of a plurality of TMR sensors, and the data processing module is used for processing transmitted magnetic flux leakage abnormal signals and identifying the position and size of a weld fatigue crack; the external power supply module provides a working power supply for each module; during detection, the exciting coil excites a uniform magnetic field in a welding seam area, the motion control module controls the walking trolley to continuously scan the whole welding seam area, the sensor array probe senses a magnetic flux leakage abnormal signal of the welding seam area and transmits the signal to the data processing module, and the data processing module completes identification and output of crack parameters. The automatic scanning detection of the fatigue crack of the welding seam is realized, and the length, depth and position information of the crack is accurately recorded.