8 results about "Wave response" patented technology

A defect detection method is provided for a pressurized pipe having at least one defect. According to the method, an acoustic source generates a probing wave of a frequency range from 10 kHz to 100 kHz, where the probing wave is scattered by the at least one defect to create a reflected wave; an acoustic receiver measures a wave response to obtain a measured response, where the measured response is attributed essentially to a superposition of the probing wave and the reflected wave; and a computer device processes the measured response to locate the at least one defect.

The application discloses an epitaxial method of a very long wave InAs / InAsSb superlattice infrared detector and relates to the technical field of semiconductor devices. The method comprises the following steps: first, preheating a GaSb substrate; then, growing an InAs layer by applying In beam and As beam; then, growing a transition layer by synchronously increasing As and Sb beams at equal increments; then, growing an InAsSb layer by stabilizing As and Sb beams; then, synchronously adjusting As and Sb beams at equal decrements to restore the initial As beam and make the Sb beam zero; and then, repeating the growth process of each layer to form a superlattice structure, and obtaining a target epitaxial wafer through post-processing. The application realizes smooth transition of the InAs layer and the InAsSb layer by precisely controlling the beam and the V / III ratio, obtains a high-quality superlattice structure, guarantees the very long wave response characteristics, and significantly improves the response rate, the detection rate and the working stability of the detector.

This invention belongs to the field of wave height prediction technology and discloses a wave prediction method that considers the evolution characteristics of the marine environment. The method includes the following steps: (1) collecting historical data on significant wave height, average period, and wind speed of waves in the target sea area and processing the data; (2) performing seasonal trend decomposition on the significant wave height sequence to obtain trend terms, seasonal terms, and residual terms; (3) calculating wind and wave response indices based on wind speed changes, wave average period changes, and significant wave height changes; (4) generating wind and wave response state weights and using these weights to adjust the influence of different historical time steps, different wave height components, and meteorological and oceanographic elements in the prediction process; (5) correcting the prediction contributions of the trend terms, seasonal terms, and residual terms with weights, and reconstructing the predicted future significant wave height. This invention can improve the stability of significant wave height prediction during periods of significant wind speed changes or sea state transitions.

The application discloses a high-performance Helmholtz nanoresonator responding to ultrasonic waves and a preparation method thereof. The method comprises the following steps: preparing a CeO2 mesoporous hollow skeleton by using a hydrothermal synthesis method in a one-pot method, covering a SiO2 shell layer on the surface of the CeO2 mesoporous hollow skeleton by using an in-situ polymerization method, and controlling the thickness of the SiO2 shell layer by adjusting reaction conditions to prepare the CeO2@SiO2 Helmholtz nanoresonator. The preparation process is simple, the prepared nanoresonator is not only uniform in structure, but also has high ultrasonic wave response performance, and has a wide application prospect.

The application provides a kind of based on super surface dual-frequency non-diffractive multi-beam antenna and design method, it is related to electromagnetic field, antenna includes unit structure, unit structure includes first layer metal patch, second layer metal patch and third layer metal patch;First layer metal patch is sensitive to high-frequency electromagnetic wave response, and third layer metal patch is sensitive to low-frequency electromagnetic wave response.Through the parameter of first and second layer patch is respectively conditioned, the array reflection phase of array unit at two operating frequencies is realized independent control, and then the non-diffractive beam array reflection phase distribution is realized according to actual needs, realizes dual-frequency non-diffractive focusing effect, according to generalized Snell law, further realizes for non-diffractive beam arbitrary angle deflection, finally the superposition of multiple single-beam array reflection phase distribution can be realized multi-beam non-diffractive.The application has the advantages of small array, wide focusing range, flexible beam direction control and simple manufacturing.

This invention relates to a dual-mode rocker-plate wave energy generation device and energy harvesting method based on a stepped moon pool. At least one moon pool is set within a square barge carrier. A rectangular step is set at the bottom of the moon pool, and a rocker-plate float is installed inside the cavity, with a rotating shaft passing through the center of the float. Slots perpendicular to the surface of the square barge carrier are respectively opened on two opposite side walls of the moon pool cavity. A piston rod is slidably connected within the slots, with one end of the piston rod rigidly connected to the end of the adjacent rotating shaft via a crank-connecting rod, and the other end connected to a hydraulic transmission power generation system. The rectangular step within the moon pool amplifies the wave response amplitude, causing the heave-roll dual-degree-of-freedom rocker-plate assembly to generate heave and roll motions. The rotating shaft converts the wave energy accumulated in the expanded moon pool into electrical energy through the hydraulic transmission power generation system. This invention achieves an organic unity of wave focusing effect, efficient energy harvesting, wide-frequency response, and structural durability, providing a reliable technical solution for the large-scale application of wave energy power generation technology.

This invention discloses a method for detecting the quality of power pole splices based on the back-transmission ratio of elastic wave signals, belonging to the technical field of power facility safety evaluation. The method includes: applying vibration to the pole and acquiring the elastic wave response signal; extracting the reflection amplitude A at the splice. b And the amplitude of the reflection from the top of the pole A t This invention introduces a distance attenuation coefficient κ to construct a back-transmission ratio ζ that eliminates the influence of excitation force. Based on the elastic wave multilayer medium propagation model, a nonlinear mapping relationship between the impedance ratio η of the joint and the rod and ζ is established, and η is obtained by solving the problem. The tightness of the joint is evaluated based on the value of η; the closer η is to 1, the tighter the connection. This invention eliminates the influence of impact force by introducing a back-transmission ratio ζ and compensates for the difference in propagation distance by using an attenuation coefficient κ, thus achieving quantitative and robust detection of the joint quality and overcoming the shortcomings of traditional methods that rely on the absolute amplitude of the signal and are easily affected by medium attenuation.

This invention discloses a design method and experimental system for an adaptive control device of a magnetostrictive phononic crystal beam based on deep learning, relating to the field of intelligent elastic wave metamaterials and adaptive active control technology. The method includes the following steps: S1: Generating a dataset through multiphysics finite element simulation; S2: Training a deep learning model using the dataset to obtain a forward prediction model and a reverse design model; S3: Calling the reverse design model according to the target elastic wave characteristics to calculate the optimal multi-field parameters, adjusting the physical field state of the corresponding device according to the optimal multi-field parameters, and simultaneously measuring the actual elastic wave response under the physical field state to verify the consistency between the actual elastic wave response and the target elastic wave characteristics, thus forming a closed-loop control. This method achieves dynamic, adaptive, and precise control of the bandgap position, width, and defect state frequency of the phononic crystal beam's elastic wave through an intelligent closed loop of "perception-decision-execution".