11 results about "Material Absorption" patented technology

The utility model relates to a sewage well of a municipal road, which comprises a well body, a first support plate connected to the upper part of the well body, a well lid clamped on the first support plate, a water outlet arranged on the well lid, a second support plate connected to the middle part of the well body, an anti-falling net clamped on the second support plate, and a double-cavity noise reduction structure connected to the middle lower part of the well body. And the interior of the double-cavity silencing structure is connected with a sound absorption middle cavity. The double-cavity silencing structure is arranged, sound waves can be reflected when entering the small-caliber part of the double-cavity silencing structure, part of the sound waves can be reflected back, the rest of the sound waves continue to move, the two parts of the sound waves meet again to form destructive interference, and therefore noise is reduced, the energy density of the sound waves is high in the narrow part in the middle, and noise is reduced. The sound absorbing material in the double-cavity silencing structure absorbs part of sound wave energy, so that the strength of sound waves is reduced, when the sound waves enter a large space again, the energy density is reduced, the sound waves are further diffused, and therefore noise caused by sewage flowing is reduced.

This invention discloses a method for enhancing the terahertz absorption spectrum of materials. The method uses a terahertz time-domain spectroscopy system to measure the material spectrum, calculates the material's transfer function, amplitude, and phase using the acquired reference signal and sample signal, fits the material's absorption spectrum by constructing a multi-Gaussian function model, and enhances the absorption spectrum through a coefficient enhancement factor. This strengthens the ability to identify minute differences in the terahertz spectrum and improves the ability of terahertz spectroscopy to distinguish substances with similar properties, similar compositions, and trace amounts.

The application relates to the material field and provides a layered Ti3C2T x / MXene loaded FeCo nanoparticle composite material, a preparation method and application, FeCo nanoparticles prepared by a hydrothermal method and Ti3C2T x / MXene are combined by an electrostatic self-assembly method, so that a layered composite material is obtained, FeCo nanoparticles with soft magnetic properties are loaded between layers and on the surface of the Ti3C2T x / MXene material, and the FeCo nanoparticles can adjust the dielectric property of the composite material, so that the composite material can be widely applied in the wave absorption field. The application has the advantages of simple equipment, low production cost, high production efficiency and green pollution-free. The composite material is a high-reflection and low-absorption material in a 170-220 GHz frequency band, and the absorption rate is 10-30%. In a 0.2-3 THz range, the product prepared by the method also has a wave absorption effect, and the absorption coefficient is 100-150 cm ‑1 .

The application relates to the technical field of wave-absorbing materials, in particular to a wide-band calcium ferrite wave-absorbing material and a preparation method and application thereof. 1.8 La 0.2‑x Ce x Fe2O5, wherein 0<=x<0.14. The application solves the problems of narrow absorption frequency band and low efficiency of the oxide wave-absorbing material by adjusting the composition and dielectric properties of the material through La and Ce double-element co-doping, and the prepared material has the advantages of wide absorption frequency band and high absorption intensity.

The utility model relates to an emptying and speed reducing flow divider for a gas flow standard device, which is integrally of an upward expanding structure and comprises a mounting flange and a concentric different-diameter outer cylinder, the mounting flange is connected with a device outlet flange, an inner cylinder is arranged in the concentric different-diameter outer cylinder, and the lower end of the concentric different-diameter outer cylinder is connected with an elbow. The inner cylinder, the concentric different-diameter outer cylinder and the elbow are filled with sound-absorbing material rock wool; a first-stage screen, a second-stage screen, a third-stage screen, a fourth-stage screen and a fifth-stage screen are sequentially arranged in the concentric reducing outer barrel and the elbow in the airflow direction, a cross partition plate is arranged between the second-stage screen and the third-stage screen, and the top end of the concentric reducing outer barrel is connected with a rain cap through an outer hexagon bolt. Meanwhile, the sound absorbing material is used for absorbing sound energy, so that the noise is effectively reduced.

The invention relates to a three-band metamaterial wave absorber based on artificial intelligence aided design, and belongs to the technical field of artificial electromagnetic materials. The invention aims to solve the problems of low absorption efficiency, narrow bandwidth, large thickness and sensitivity to incident wave polarization state of the traditional wave-absorbing material. The wave absorber adopts a periodically arranged array unit structure, each unit is composed of a metal resonance layer, a dielectric layer and a metal back plate from top to bottom, and the metal resonance layer comprises two coaxial closed resonance rings and four 90-degree fan-shaped metal patches which are symmetrically distributed. Structural size parameters are optimized through an artificial intelligence aided design method, the advantages of three-band high absorptivity, polarization insensitivity, ultra thinness and compactness are achieved, and the sensor has the remarkable effects of being simple in structure, low in cost and easy to manufacture and is suitable for high-performance electromagnetic wave absorption and sensing application.

Methodology of determining absorption and an extinction coefficient of a prism shaped material, including simultaneously for a multiplicity of wavelengths, using an easy to practice technique.

The utility model relates to the technical field of sound absorption testing, in particular to sound absorption testing equipment for a nano sound absorption material, which comprises a sound absorption testing equipment main body, square boxes are fixedly connected to two ends of the sound absorption testing equipment main body, two round rods are connected to the inner side surfaces of the two square boxes, and sliding plates are slidably connected to the outer surfaces of the two round rods. According to the sound absorption testing device, the rack can be driven to move by utilizing the rotating gear rotating shaft, so that a plurality of nano sound absorption materials can enter the sound absorption testing device, a sound absorption test can be continuously carried out, the working efficiency of the sound absorption testing device is improved, and the sound excitation device gives out sound of a set decibel. At the moment, sound can penetrate through the nano sound-absorbing material, then the sound collector on the other side collects the received sound, and then the audio analyzer can carry out sound-absorbing test on the nano sound-absorbing material so as to obtain the amount of sound absorbed by the nano sound-absorbing material, so that the sound-absorbing performance of the nano sound-absorbing material is tested.

The utility model relates to the technical field of seismic exploration, and discloses a seismic exploration detection audio noise reduction device which comprises a detector, the outer wall of the detector is slidably connected with a first protective shell, the outer wall of the detector is fixedly connected with a second protective shell, and the first protective shell and the second protective shell are attached to each other. A first sound insulation shell is arranged on the outer wall of the first protection shell, a second sound insulation shell is arranged on the outer wall of the second protection shell, the space between the first protection shell and the first sound insulation shell and the space between the second protection shell and the second sound insulation shell are filled with sound absorption materials, the output end of the detector is sleeved with a silencing pipe, and the silencing pipe is filled with sound absorption cotton. According to the utility model, the first protective shell and the second protective shell are attached to the outer wall of the detector to provide preliminary protection, the sound absorption material is filled between the sound insulation shell and the protective shells to absorb noise transmitted from the outside, and meanwhile, the hush pipe sleeved at the output end of the detector further eliminates noise generated during signal output. The effect of effectively blocking and absorbing noise is achieved.

The present invention relates to the technical field of electromagnetic functional materials, and particularly relates to a design method for a temperature-insensitive metamaterial. The present invention adopts a design method of dielectric compensation, analyzes the influence of the dielectric properties of the substrate and the electrical properties of the electromagnetic regulation layer on the wave absorption performance of the metamaterial wave absorption structure respectively, extracts the quantitative relationship and proposes a compensation formula, that is, the change of the electrical properties of the electromagnetic regulation layer material compensates for the change of the dielectric properties of the substrate material, so as to realize the stability of the position of the absorption peak of the metamaterial with temperature change. The present invention does not need to regulate the dielectric properties of the substrate through complex processes such as doping, and can endow the wave absorption performance of the metamaterial with temperature-insensitive characteristics without damaging the substrate material, providing a new design idea for the metamaterial wave absorption structure; moreover, the present invention has a wide environmental adaptability, great practical application feasibility, and a more flexible implementation method, and has wide applications in fields such as microwave high-temperature resistant stealth skins and high-temperature resistant wave absorption devices.