36results about How to "Improved impact characteristics" patented technology

[Problems] To provide a tunable laser with high reliability and high performance, and of low cost.[Means for Solving Problems] A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (123), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposing emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

To provide a tunable laser with high reliability and high performance, and of low cost.A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (123), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposing emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

This case hardened steel, which has favorable cold forgeability and superior impact properties after case hardening processing, contains C, Si, Mn, S, Cr, Al, Ti, Nb, B, and N, the remainder being iron and unavoidable impurities, precipitates that are at least 20 [mu]m2 among precipitates containing Ti and / or Nb have a number density of no greater than 1.0 precipitates / mm2, precipitates containing Mn and S that are over 5 [mu]m2 and less than 20 [mu]m2 among precipitates containing Ti and / or Nb have a number density of over 0.7 and no greater than 3.0 precipitates / mm2, and the fraction of ferrite is over 77 area%.

The invention discloses a bearing early fault diagnosis method for multiple noise reduction processing. The method comprises the following steps: collecting a vibration signal of a bearing; carrying out short-time Fourier transform on the bearing vibration signal, and preliminarily judging whether the bearing has a fault or not; adopting wavelet packet transformation to decompose and reconstruct the bearing vibration signal, and carrying out preliminary denoising; decomposing, screening and reconstructing the wavelet packet reconstruction signal by using an ensemble empirical mode decomposition method; eliminating aliasing interference signals contained in the reconstructed signals, and performing multi-layer noise reduction on the bearing vibration signal; carrying out demodulation processing on the reconstructed signal after noise reduction, and extracting a bearing fault frequency; and comparing with a theoretically calculated fault frequency, and diagnosing to obtain a fault conclusion of the bearing. According to the method, a fault analysis mode combining wavelet packet transformation, an ensemble empirical mode decomposition method and autocorrelation calculation denoising is adopted, weak fault features are highlighted, bearing abnormity can be diagnosed and recognized as early as possible in the early fault stage of the bearing, and losses caused by equipment faults are avoided or reduced.

A bumper system includes a rollformed tubular beam with bracket mounts welded to a rear surface for mounting to vehicle frame rails. The illustrated beam has a continuous tubular cross section for its entire length, and includes a center section, corner-forming end sections, and mounting sections connecting ends of the center section to the end sections. The center, end and mounting sections can be linear or similarly curved or differently curved. The center, end and mounting sections can be similarly or differently locally annealed as part of being tuned to specific impact loading criteria, including annealing all or part of cross-sectional areas. The annealing can be done in-line with a rollforming process, such as to assist with forming tight radii in the beam for meeting packaging / space-related requirements, or can be part of a secondary process for advantageously affecting impact strengths in selected localized areas.

A dome-shaped shelter, which is readily manually assembled and disassembled, as needed, the shelter comprising a plurality of side-by-side generally triangular shaped arched segments enclosing a generally circular area, a support base with each of the segments comprising a lower end resting on the support base and a pair of spaced apart rigid upwardly arched side members converging upwardly from the lower end and a weather and UV resistant covering skin, a latch assembly securing each arched side member of a segment to the adjacent arched side member of an adjacent segment, a rigid vertical support mast releasably secured at the center of the encircled area, and manually releasable locking means securing the segments to the mast.

A dome-shaped shelter, which is readily manually assembled and disassembled, as needed, the shelter comprising a plurality of side-by-side generally triangular shaped arched segments enclosing a generally circular area, a support base with each of the segments comprising a lower end resting on the support base and a pair of spaced apart rigid upwardly arched truss members converging upwardly from the lower end and a weather and UV resistant covering skin, a latch assembly securing each arched side member of a segment to the adjacent arched side member of an adjacent segment, a rigid vertical support mast releasably secured at the center of the encircled area, and manually releasable locking means securing the segments to the mast.

A steel tie rod end includes a shaft portion and first and second fitting portions. A minimum area portion having a small radially cross-sectional area is provided for the shaft portion, and 90% or above of a steel structure of the minimum area portion is formed of martensite or tempered martensite. The surface hardness of the minimum area portion and the average hardness of the radial cross section of the minimum area portion are 600 Hv or below, and the average hardness of the radial cross section of the first fitting portion and the average hardness of the radial cross section of the second fitting portion are 300 Hv or below. A method of manufacturing a steel tie rod end includes a quenching process of heating only a prospective shaft portion by high frequency to an austenitizing temperature and then rapidly cooling the prospective shaft portion by water or cooling medium.

The invention belongs to the field of electric system grounding for lightening protection, and relates to a multi-current scattering arm star-shaped grounding electrode topological structure. The multi-current scattering arm star-shaped grounding electrode topological structure is specifically suitable for a grounding electrode in a pole tower earth screen. A novel grounding electrode arrangement form is designed so that an impact grounding resistance value under a high earth resistivity can be reduced. According to the arrangement form, current scattering channels, in the grounding electrode, of a lightning current are increased, namely, each radiation branch of the star-shaped grounding electrode is additionally provided with at least one bifurcate current scattering arm, one end of each bifurcate current scattering arm is connected with the tail end of the corresponding radiation branch, the other end of each bifurcate current scattering arm extends in the radial direction, therefore, the better current scattering effect can be achieved, the impact performance of a grounding body is effectively improved, and the impact grounding resistance value of the grounding electrode is reduced. The structure is easy to manufacture and install, construction difficulty caused by the fact that the grounding electrode is lengthened blindly is avoided, a very good resistance reducing effect can be achieved, the performance is superior, and the structure is economical and reasonable.

The invention discloses a data noise reduction method based on improved empirical mode decomposition (EMD) and minimum entropy deconvolution (MED). The invention belongs to the technical field of communication, and comprises the following specific steps: 1, denoising an original signal by using MED to enhance the impact characteristic of the signal; 2, inputting the denoised signal into an improved EMD for decomposition, and drawing an envelope line on the denoised signal by using an envope function to enhance the continuity of the signal; 3, extracting characteristic variables, namely IMF components, of the signal with the drawn envelope line by using improved EMD, so that the signal processing workload is reduced; and 4, finally, inputting the extracted IMF components into other subsequent data processing models, so that the workload of subsequent model processing is reduced, and the precision of subsequent data analysis processing is improved. According to the method provided by theinvention, the limitation of MED feature extraction under strong background noise is made up, and the defect that empirical mode decomposition is insensitive to weak fault features is overcome.

A hot-formed member that has both a prescribed chemical composition and a metal structure which contains 10 to 40% by area of austenite and in which the total number density of grains of the austenite and martensite is 1.0 grain / Mum2 or more and that exhibits a tensile strength of 900 to 1300MPa.

A steel tie rod end includes a shaft portion and first and second fitting portions. A minimum area portion having a small radially cross-sectional area is provided for the shaft portion, and 90% or above of a steel structure of the minimum area portion is formed of martensite or tempered martensite. The surface hardness of the minimum area portion and the average hardness of the radial cross section of the minimum area portion are 600 Hv or below, and the average hardness of the radial cross section of the first fitting portion and the average hardness of the radial cross section of the second fitting portion are 300 Hv or below. A method of manufacturing a steel tie rod end includes a quenching process of heating only a prospective shaft portion by high frequency to an austenitizing temperature and then rapidly cooling the prospective shaft portion by water or cooling medium.

This door inner panel is a door inner panel formed of a metal sheet and includes a first panel portion having a first top sheet portion and a first standing wall portion connected to the first top sheet portion, a second panel portion having a second top sheet portion disposed with a gap with the first top sheet portion of the first panel portion and a second standing wall portion connected to the second top sheet portion, a flange portion connected to the first standing wall portion and the second standing wall portion, and a flat sheet portion disposed between the first panel portion and the second panel portion, the first standing wall portion and the second standing wall portion respectively have a level difference portion, and both ends of the flat sheet portion are integrated with the flange portion or the level difference portions.

A method for manufacturing a magnetic head suspension, which can smoothly form the magnetic head suspension, and the T1 wind resistance of the formed magnetic head suspension is improved by increasing the T1 frequency and the shaking frequency, and the impact characteristics are improved. The method comprises: a rigid member chain manufacturing step forming a rigid member chain product, wherein the rigid member is continuously provided; a flexure manufacturing step forming a flexure integrally formed with the elastic member and the reinforcing member; The base manufacturing step, which forms the base; the lamination and joining step, which laminates and joins the rigid part chain, the elastic part chain, the base and the flexure to form a stack; the cutting step, which cuts from the stack and detach each head suspension.

The invention belongs to the field of lightning protection and grounding of electric power systems, and relates to a star-shaped grounding pole topology structure with multiple scattered flow arms, which is particularly suitable for grounding poles in pole tower grounding grids. By designing a new grounding pole layout form, high soil resistance can be effectively reduced The impact grounding resistance value under the rate. This arrangement increases the distribution channel of the lightning current in the ground electrode, that is, at least one forked diffusion arm is added to each radiation branch of the star-shaped ground electrode, and one end of the bifurcated diffusion arm is connected to the end of the radiation branch. , the other end extends radially, which can achieve a better dispersion effect, effectively improve the impact characteristics of the grounding body, and reduce the impact grounding resistance of the grounding electrode. The method is simple to manufacture, easy to install, avoids construction difficulties caused by blindly increasing the length of the grounding electrode, and can achieve a good effect of reducing resistance, with excellent performance and reasonable economy.

The invention provides a high-strength steel sheet excellent in stretch-flange characteristics after working and in corrosion resistance after coating. A steel sheet which has a composition containing by mass C: 0.02 to 0.20%, Si: 0.3% or below, Mn: 0.5 to 2.5%, P: 0.06% or below, S: 0.01% or below, Al: 0.1% or below, Ti: 0.05 to 0.25%, and V: 0.05 to 0.25% with the balance consisting of Fe and unavoidable impurities and a substantially ferrite single-phase structure wherein the contents of Ti, V, and solid-soluted V in precipitates of less than 20nm in size are 200 to 1750 mass ppm, 150 to 1750 mass ppm, and 200 to less than 1750 mass ppm respectively.

The invention relates to a manufacturing method of a modified bamboo powder-based PC / ABS (Poly carbonate / Acrylonitrile Butadiene Styrene) alloy in the field of high polymer materials. The manufacturing method comprises the following steps: carrying out blending and internal mixing on bamboo powder, ABS-g-MAH (Maleic Anhydride), a fiber pre-dispersing agent and a coupling agent to obtain an ABS-g-MAH-g-bamboo powder composite; blending the ABS-g-MAH-g-bamboo powder composite, PC-g-EVA (Ethylene Vinyl Acetate) and PEW (polyethylene wax)-g-MAH at high speed and carrying out melt blending to obtain the modified bamboo powder-based PC / ABS alloy. The alloy material manufactured by the method disclosed by the invention not only has superhigh normal-temperature impact tenacity and low-temperature impact tenacity, but also has low viscosity property, is easy for molding processing of larger products, and has relatively high tensile strength, relatively low cost and an environment-friendly effect as well as a wide market value.