12 results about "Periodic alternating" patented technology

The utility model discloses a non-equal-pitch periodic alternating thread connection pair which is composed of a plurality of minimum period connection pair structures. The minimum period connecting pair structure is composed of a standard thread side and a non-equidistant periodic alternating thread side; by means of the thread pitch structure which changes alternately, radial pressure between threads is increased statically, and the anti-loosening capacity of a thread pair is improved. And an energy transfer path is more efficiently interfered under a dynamic load, and energy dispersion and offset are realized, so that a loosening mechanism is more thoroughly blocked.

This invention relates to a multi-point laser marking auxiliary focusing device, comprising a control system; an X-axis galvanometer motor connected to an X-axis reflector; and a Y-axis galvanometer motor connected to a Y-axis reflector. When the indicator light source is lit, two non-overlapping light points are formed on the marking plane. At this time, by rotating the YX-axis galvanometer motor, any one of the indicator light points can be positioned at any position within the effective range of the marking plane. By alternately lighting the two indicator light sources and coordinating with the rotation of the galvanometer motor, and through periodic alternating positioning, the two sets of indicator light sources can be lit, enabling the two indicator light points to overlap at any point in the effective area of ​​the marking plane. When the distance between the marking plane and the galvanometer changes, the light points will separate, thereby guiding the operator to adjust the distance between the galvanometer and the marking plane to make them overlap again, completing the auxiliary focusing operation.

The invention provides a gas concentration measuring device and a manufacturing method thereof, and the manufacturing method comprises the steps: manufacturing a photonic crystal layer through at least one periodic alternate lamination of at least two material layers with different compositions, a photonic crystal layer and a transduction emitter are sequentially arranged at one opening end of the cavity structure in a stacked mode, a photonic crystal layer and a transduction receiver are sequentially arranged at the other opening end of the cavity structure in a stacked mode, and the frequency of the photonic crystal layer and the thickness of each material layer are calculated according to the built forbidden band center frequency f of the photonic crystal layer and the thickness of each material layer. The thickness of each material layer under the maximum transmission efficiency eta max is determined based on the relation model according to the acoustic wave propagation velocity c in each material layer and the relation model between the acoustic wave propagation velocity c in each material layer, so that the pollution of sensitive or corrosive gas to be detected to the transducer is avoided, and the acoustic wave transparent transmission effect of the photonic crystal layer can be increased to the maximum extent; therefore, the detection quality of the gas is improved.

The application discloses a wind turbine periodic independent variable pitch control method, device and electronic equipment. The control method comprises the following steps: obtaining a reference pitch angle; determining a first sub-additional pitch angle, a second sub-additional pitch angle and a third sub-additional pitch angle corresponding to three blades of an impeller respectively; superimposing the reference pitch angle with the first sub-additional pitch angle, the second sub-additional pitch angle and the third sub-additional pitch angle respectively to obtain a first pitch angle, a second pitch angle and a third pitch angle corresponding to the three blades respectively; and controlling the wind turbine to periodically and independently change the pitch according to the first pitch angle, the second pitch angle and the third pitch angle. The wind turbine periodic independent variable pitch control method can change the position of the blade with the change of the azimuth angle of the impeller, reduce the periodic alternating load of the blade root caused by the rotation of the impeller, and does not need to additionally install other sensors, thereby reducing the design cost of the unit.

The application relates to the technical field of material grinding, in particular to a zirconium oxide powder wet grinding and dispersing device and process, which comprises an upward-opening grinding tank, a grinding column is rotationally arranged in the grinding tank, an adjusting groove is arranged in the grinding column, a jacking mechanism is arranged in the adjusting groove, an annular variable-diameter strip realizes a diameter expansion action under the drive of a variable-diameter assembly, the annular variable-diameter strip is driven to move upwards at the same time as the diameter expansion is synchronously completed, the annular variable-diameter strip extrudes the side wall of the grinding column and promotes the deformation of the side wall in the process; when the annular variable-diameter strip moves downwards, the circular adjusting plate no longer implements the diameter expansion operation on the annular variable-diameter strip, at this moment, the annular variable-diameter strip resets, through the up-and-down reciprocating movement, the annular variable-diameter strip continuously applies periodic alternating stress to the side wall of the grinding column, and the deformation generated by the periodic alternating stress can extrude and grind the zirconium oxide.

The invention relates to a cooler for cooling a power electronic component, comprising a housing part having a flow channel for a cooling fluid; the invention relates to a heat exchanger comprising a flow channel, and a turbulator having a periodic alternating structure, the turbulator being arranged in the flow channel, the flow channel extending in a flow direction, and the inflow direction into the turbulator and the outflow direction out of the turbulator being oriented parallel to each other.

The invention relates to a scale element (2) comprising a substrate (2.1) on which a division track (2.2) is arranged. The division track (2.2) is formed along a circumferential direction (x) from a periodic sequence of alternatingly arranged electrically conductive division areas (2.21) and non-conductive division areas (2.22), wherein the electrically conductive division areas (2.21) are each formed from a layer of electrically conductive material. At least one bore (2.11) is arranged in the substrate (2.1). The electrically conductive division areas (2.21) each have an opening (2.211), wherein the electrically conductive material surrounds the opening (2.211). The bore (2.11) extends through the opening (2.211) in at least one of the electrically conductive division areas (2.21) in the substrate (2.1). In addition, two electrically conductive division areas adjacent in the circumferential direction (x) (2.21) designed such that the angular distances (α, β, γ) between their conductive layers are of different sizes along the radial direction.

The utility model provides a multifunctional inspection hammer, which relates to the technical field of inspection hammers and comprises an inspection hammer, a hammer handle is vertically arranged on the inspection hammer, and the central axes of the inspection hammer and the hammer handle are vertical to each other; the clamping plate is fixed on the hammer handle and is parallel to the central axis of the hammer handle, a continuous Z-shaped measuring groove is formed in the side wall of the clamping plate in the length direction of the hammer handle, and the continuous Z-shaped measuring groove is formed by connecting transverse surfaces and longitudinal surfaces which are periodically and alternately arranged; and a first measuring part and a second measuring part of which the included angles are 90 degrees are formed at the joints of the adjacent transverse surfaces and longitudinal surfaces. According to the utility model, through the design of the asymmetric continuous Z-shaped measuring groove of the clamping plate, the measuring process is more efficient, the wheel sensor measuring process is more efficient, and the overall detection precision and reliability are improved; through the design of the round steel, the hollow structure and the spiral bottom cover, not only is the multifunctionality of the inspection hammer improved, but also the overhaul efficiency and precision are enhanced.

The invention relates to a cooler for cooling a power electronic component (2), comprising a housing part (10) having a flow channel (11) for a cooling fluid; and a turbulator (20) having an inflow region (21), an outflow region (22) and a periodic alternating structure (25) arranged therebetween. Wherein the turbulator (20) is arranged in the flow channel (11), the flow channel (11) extends in a flow direction (R1), and an inflow direction (R2) of the inflow region (21) and an outflow direction (R3) of the outflow region (22) are oriented parallel to the flow direction (R1).

Inductive sensor (9) for detecting a position, comprising: - a printed circuit board (22) extending in a longitudinal direction and a transverse direction perpendicular to the longitudinal direction - a first inductive transformer (30) arranged on the circuit board (22) for the secondary-side output of a first sensor signal dependent on a first coupling, - a second inductive transformer (30') arranged on the circuit board (22) for the secondary-side output of a second sensor signal dependent on a second coupling, and - a coupling element (16) arranged in a vertical direction transverse to the longitudinal direction and transverse to the transverse direction above the two transformers (30, 30'), which is configured to influence the coupling in the two transformers (30, 30') depending on the position to be detected, - wherein each transformer (30, 30') has at least one receiving coil (25, 25') and an excitation coil (23) surrounding the receiving coil (25, 25'), such that a periodic alternating voltage signal applied to the excitation coil (23) can induce the respective sensor signal, dependent on the respective coupling, into the receiving coils (25, 25'), wherein the receiving coil (25, 25') has a periodically recurring loop structure with which a receiving geometry is formed, - wherein the two transmitters (30, 30') extend around a rotational axis (8) about which the coupling element (16) is rotatably mounted, - wherein the two transmitters (30, 30') are designed to be point-symmetric about the axis of rotation (8) or axis-symmetric about a mirror axis passing through the axis of rotation (8). - wherein the receiving coils (25, 25') of the two transformers (30, 30') have a distance of between 20° and 60°, preferably between 30° and 50° from each other in the circumferential direction around the axis of rotation (8), - wherein in at least one transformer (30, 30') a minimum radial distance between an excitation coil turn of the excitation coil (23) and a receiving coil turn of one of the receiving coils (25, 25') is between 10% and 20% of a maximum radial extent of the receiving coil turn at the angular position of the minimum radial distance, - wherein the excitation coils (23) of the transformers (30, 30') have circumferential ends viewed around the axis of rotation (8), between which a space with a circumferential distance is formed, - wherein the coupling element (16) has two radially opposing wings (36) with a circumferential width extending in the circumferential direction and wherein the circumferential distance is chosen to be greater than or equal to the circumferential width, and - wherein a free space is formed in the circumferential direction between the two wings (36).

The application relates to a four-element topological insulator heterostructure and a functional layer and a preparation method and application of a spin-orbit torque device, wherein the topological insulator heterostructure is expressed as: [Sb2Te3 (5-x) / Bi2Se3 (x)]d / Sb2Te3 (3 nm), Sb2Te3 and Bi2Se3 are periodically and alternately stacked, x represents the thickness of the Bi2Se3 layer in a single period, x=0-5 nm, and d represents the number of the alternating periods. The functional layer of the spin-orbit torque device is sequentially deposited with a Ti layer, a CoFeB layer, an MgO layer and a Ta layer on the TI layer. The preparation method adopts a magnetron sputtering deposition process. The functional layer needs to be subjected to annealing treatment. The functional layer of the spin-orbit torque device can be used for manufacturing a Hall bar device. The application realizes effective regulation of a topological insulator energy band structure and a carrier concentration, thereby obtaining a wide band gap, a high spin Hall angle and a low critical switching current density, and can be used for manufacturing a low-power-consumption spin electronic device.