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204 results about "Digital analysis" patented technology

Full spectral range spectrometer

A spectrometer is designed capable of effectively covering the full desired spectral range using an array of multiple diffraction gratings arranged in gradually differentiated angles to diffract certain sub-range of photon wavelengths to the target detectors without relying on mechanically changing gratings or use of any moving parts. The optically subdivided spectral analysis results are then electronically integrated to accurately yield the desired full range spectral measurement at a speed compatible to the limit of optical and digital analyzers' speed of the measuring system without manual adjustment and / or mechanical movement delays.
Owner:CHEN LIANGYAO +2

Rotating speed tracking and sampling and spectrum number curing and analyzing method of variable speed mechanical fault diagnosis

The invention relates to a rotating speed tracking and sampling spectrum number solidifying method of variable speed mechanical fault diagnosis, which is characterized by comprising the steps of: sampling mechanical related fault signals by replacing rotating speed pulse signals with frequency of Xfn in a moving machine with astronomical clock recurrent pulse signals; and then carrying out numerical analysis on the signals by applying an FFT (Fast Fourier Transform) technology, reconstructing a classical frequency coordinate system of FFT analysis output information into a spectrum number coordinate system of rotating speed tracking FFT analysis, and establishing a recognition function of spectrum numbers corresponding to information characteristics. The invention can change the classical rotating speed variable state which can not be monitored and diagnosed in a process of sampling a astronomical clock period into a state which can be monitored and diagnosed by rotating speed tracking and sampling, thereby greatly improving the time coverage rate of safety monitoring, preventing a dead zone of a classical technology, and being especially suitable for fault diagnosis in fields of city light rail traffic, subway, city buses, wind power generation and the like. The recognition of the classical technology to spectrogram and frequency spectrum is greatly simplified by applying a curing characteristic spectrum number formula, which is beneficial to manual spectrum recognition and more computer automatic diagnosis.
Owner:北京唐智科技发展有限公司

Painting and calligraphy learning machine

The invention discloses a painting and calligraphy learning machine comprising a workbench, an optical transmission system, a digital analysis system, an imaging projection system and a power supply system. The desktop of the workbench is mainly formed by a light scattering plate and a crystal soft light plate laid on the light scattering plate. A curtain is arranged under the light scattering plate. The optical transmission system comprises a main light source, and a polariscope, an enoscope and a prism through which light emitted from the main light source passes in sequence. The digital analysis system comprises a back Fresnel lens arranged in front of the prism, a front Fresnel lens arranged in front of the back Fresnel lens and a crystallite integration piece arranged in front of the front Fresnel lens. An electronic liquid crystal screen or a picture clamp is arranged between the front Fresnel lens and the back Fresnel lens. The imaging projection system comprises a collecting lens parallely arranged in front of the crystallite integration piece, a magnifying lens parallely arranged in front of the collecting lens and a reflecting mirror arranged in front of the magnifying lens and inclined to the desktop of the workbench. The painting and calligraphy learning machine provides convenience for painting and calligraphy lovers to carry out imitation creation, and can help the painting and calligraphy lovers to quickly improve the painting and calligraphy learning effect.
Owner:SHANDONG BEIDOU REFRIGERATION EQUIP

System and method for real-time appearance digital analysis for yarn

The invention relates to a system and a method for real-time appearance digital analysis for a yarn. The system comprises a camera obscura, an image acquisition system and a PC (personal computer) processing terminal, wherein the image acquisition system is electrically connected with the PC processing terminal; and at least two reflectors and an LED (light-emitting diode) backlight source are arranged in the camera obscura. The system disclosed by the invention can be used for dynamically and continuously acquiring yarn images, simultaneously performing related analysis processing on the yarn images of five side surfaces in the images respectively at the same detection position of each image during a characteristic extraction process, extracting characteristics, and finally fusing the yarn appearance characteristic information of all the images to form the appearance characteristic vector of the yarn, performing characteristic similarity DW (X, Y) calculation with a standard sample, and judging the performance and the quality of the yarn on the basis of the calculation result. According to the system and the method disclosed by the invention, the multi-angle three-dimensional appearance characteristic information of the yarn can be obtained in real time, so that the quality of the yarn can be rapidly and accurately determined; the influence of human factors on quality evaluation is effectively reduced, so that the accuracy of analysis is improved; and the system is reasonable in design and high in practicability.
Owner:CHANGZHOU ZHONGGANG TEXTILE INTELLIGENT SCI &TECH

Airborne system digital design verification system and method

The invention discloses an airborne system digital design verification system and method and belongs to the technical field of system engineering. The system disclosed by the invention comprises a top-layer digital design system and a domain engineering layered digital design system, wherein the top-layer digital design system comprises a demand analysis module, a top-layer analysis design module and a top-layer model test and verification module; and the domain engineering layered design system comprises a single-domain analysis design module, a single-domain test and verification module, multi-domain collaborative design module and a multi-domain model simulation verification module. The method disclosed by the invention comprises the following two steps: concept model machine design of an airborne system and virtual model machine design of the airborne system, wherein the former step comprises the following three sub-steps: demand analysis of the airborne system, system analysis of the airborne system and system design of the airborne system. The system and method disclosed by the invention can be used for supporting the digital analysis, design and verification of the airborne system, realizing 'design and verification first, implementation later' of the airborne system, avoiding the problems of long period, high cost, great risk and the like caused by the 'design and implementation first, verification later' of the traditional design method.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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