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158results about How to "Acquisition speed is fast" patented technology

Magnetic resonance imaging method and system for eliminating motion artifact based on dynamic tracking technology

The invention relates to the research field of magnetic resonance imaging and provides a method and a system for tracking a tested space attitude, dynamically adjusting imaging parameters of a scanner in real time and avoiding acquisition of motion artifact images in the acquisition process of magnetic resonance imaging data based on a computer vision target recognition and tracking technology. By adopting at least two video cameras for simulating stereoscopic vision of human eyes, a target is recognized, the tested space attitude is calculated, and space motion of the space attitude is monitored and judged. Once the motion occurs, parameters of the corrected space attitude are calculated immediately and are transmitted to the scanner through a transmission control protocol/internet protocol (TCP/IP), the imaging parameters of the scanner are adjusted in real time, the scanner is ensured to be capable of acquiring image data at a correct space position under the condition that the motion of the tested space attitude exists, and accordingly finally-obtained images are like images acquired under the condition that the motion of the tested space attitude does not occur. Therefore, acquired image data are stable and reliable in quality, the motion artifact is eliminated completely, and motion correction is not required in post-processing.
Owner:EAST CHINA NORMAL UNIVERSITY

Device for collecting bi-mode biology image based on fingerprint and finger vein

The invention provides a dual-mode biological image collecting device based on fingerprints and finger vein. The dual-mode biological image collecting device comprises a casing, a flat-bottomed groove is formed in the middle on the upper surface of the casing, an inclined plane is formed at the top part of the groove, electrodes are mounted at the front end and the rear end of the groove, vein image collecting infrared light sources are mounted on two side walls of the groove, a fingerprint image collecting red light source and a fingerprint image collector are mounted in the position of the bottom part of the casing corresponding to the inclined plane part of the top part of the groove, an infrared receiver and a vein image collector are mounted in the position of the bottom part of the casing corresponding to the groove, and a power supply and a control circuit for supplying power or signal transmission to the electrodes, a temperature sensor, the red light source, the infrared light source, the infrared receiver and the image collector are arranged in the casing. The performance of the biological characteristic recognition system for collecting image information in the invention is better than that of the single-mode biological characteristic recognition system just based on fingerprints and finger vein. Therefore, by adopting the dual-light-path system for collecting the images of both the fingerprints and the hand vein, the collecting speed is increased.
Owner:HARBIN ENG UNIV

Curvature detection device and method for drill rod

The invention relates to a curvature detection device and method for a drill rod. The device comprises a drill rod clamping part, a sensor transmission part and a control and operation part, wherein a three-jaw chuck, a V-shaped block and a stepping motor A are arranged on the drill rod clamping part; the three-jaw chuck is used for clamping one end of the drill rod, and the other end of the drill rod is placed on the V-shaped block; a 2D (two-dimensional) laser sensor and a stepping motor B are arranged on the sensor transmission part; the control and operation part comprises a single-chip microcomputer and a host. The detection method comprises the following steps: acquiring the three-dimensional coordinate information of hemi-profile data points of a plurality of sections of the drill rod by using the 2D laser sensor; processing and calculating a section central point through the host, and fitting the central lines of n sections; determining the maximum curvature and coordinate value of a maximum bending point, comparing with the curvature limit value of the drill rod, judging whether the curvature of the drill rod is qualified or not, and providing a judgment result for a user. The device is scientific in structure, the detection method is simple, the curvature information of the drill rod can be obtained efficiently and accurately, and technical support is provided for the increase of the production accuracy of the drill rod.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Three-dimensional morphology measurement method and device for objects with mirror surface

The invention discloses a three-dimensional morphology measurement method and a device for a objects with mirror surface. The device comprises a computer, a main camera, a slave camera, a refraction display screen, a reflection display screen, a semi-transparent mirror and a fixing device; the computer is connected with the main camera, the slave camera, the refraction display screen and the reflection display screen; the main camera, the slave camera, the refraction display screen, the reflection display screen, the semi-transparent mirror and the fixing device are fixed on an optical platform; the refraction display screen, the reflection display screen and the semi-transparent mirror are perpendicular to the optical platform; the fixing device is in a public field of the main camera andthe slave camera; image light paths reflected by the semi-transparent mirror are parallel to the image light path displayed on the refraction display screen. According to the three-dimensional morphology measurement method and the device for objects with mirror surface, object point normal vector is calculated firstly, then the morphology measurement of the objects of a continuous zone is calculated through using a gradient integration method and a binocular system; the morphology measurement of the objects of a discontinuous zone is obtained by using a direct-phase measurement deflection method and a dual-screen.
Owner:HEBEI UNIV OF TECH

Rayleigh-Doppler laser radar ground calibration system

The invention discloses a Rayleigh-Doppler laser radar ground calibration system. A light beam generated by a laser is divided into two beams through a beam splitter; one small portion is directly sent to a first detector through multi-mode optical fibers to serve as a reference signal; and most portion after being expanded by a beam expander is then guided into a sealed pipeline by a reflecting mirror; after the laser is scattered by air in the sealed pipeline, scattered signals are received by a telescope and then guided in through the multi-mode optical fibers to be sent to a standard tool for signal treatment; signals transmitting through the standard tool are sent to the detector by a convergent lens for further signal analysis treatment; and finally, the detector sends the result of the signal treatment to a computer. As a dependence relationship from a precise Rayleigh- Brillouin scattering frequency spectrum function and a frequency response function to a temperature is obtained by emitting laser signals in a ground sealed container and receiving as well as processing echo signals is obtained, the Rayleigh-Doppler laser radar ground calibration system, disclosed by the invention, has the advantages of providing calibration for inverse algorithm and improving measurement precision.
Owner:UNIV OF SCI & TECH OF CHINA

Super-resolution fluorescent digit holographic sectioning microimaging system and method

ActiveCN106885796ARealize 3D renderingAchieving super-resolution optical tomographyFluorescence/phosphorescenceMicro imagingSpatial light modulator
The invention relates to a super-resolution fluorescent digit holographic sectioning microimaging system and method and belongs to the field of fluorescent digit holographic and super-resolution imaging. Laser after amplitude modulation through a spatial light modulator loading a proper mask structure enters a microobjective to generate exciting light in a three-dimensional structure on a to-be-image sample; excited fluorescence of the sample is collected by the microobjective, and is then diffracted and divided and shifted in phase through the spatial light modulator through a dichroscope and an imaging system, and the two beans of light intervene in a position where an image detector is located to form a hologram which is recorded; the recorded hologram is reconstructed through a numerical algorithm in a computer, and for a structure in certain depth in the sample, reconstructed images of super-resolution and optical section can be separately acquired; the reconstructed images of super-resolution and optical section are fused by means of the numerical algorithm, so that super-resolution optical sectioning imaging is realized; and the reproducing distance of the hologram is changed, so that three-dimensional imaging of the super-resolution optical sections of structures in different depths of the sample can be realized.
Owner:BEIJING UNIV OF TECH

Multispectral image acquiring method and system on basis of line scanning hyperspectral imaging

The invention provides a multispectral image acquiring method on the basis of line scanning hyperspectral imaging. The method comprises the following steps of: presetting more than one characteristic wavelength for a sample to be detected; determining a relation between line numbers on a spectral axis of a camera and the wavelengths; by utilizing the more than one characteristic wavelength of the sample to be detected and the relation between the line numbers on the spectral axis of the camera and the wavelengths, calculating more than one line number on the spectral axis of the camera, which corresponds to the more than one characteristic wavelength; carrying out acquisition on the sample to be detected on a conveying device by a hyperspectral spectrometer and the camera, extracting line pixel information corresponding to the more than one line number from a two-dimensional matrix obtained by acquisition each time, and combining the line pixel information corresponding to the more than one line number in a plurality of two-dimensional matrices obtained by acquisition so as to obtain a multispectral image under multiple characteristic wavelengths. The method can implement acquisition of the multispectral image under the specific wavelengths.
Owner:BEIJING RES CENT OF INTELLIGENT EQUIP FOR AGRI

ECT sensor for monitoring moisture transmission inside concrete member

The invention belongs to the technical field of concrete member durability monitoring equipment, and relates to an ECT sensor for monitoring the moisture transmission inside a concrete member. The ECTsensor is designed in a round shape. The structures of electrode plates, a clamp and a water storage tank are optimized. The traditional sensor structure design suitable for pipeline two-phase flow measurement is abandoned. Vertical placement and a non-closed design are adopted. Copper foil electrode plates are adhered to the outer wall of a PVC insulating pipe. The size and number of the electrode plates simplify the hardware structure. A metal outer shielding cover is adopted for sealing. A water storage pipe and a water storage pool facilitate the research on the transmission process of moisture in a concrete test piece during water injection at different angles. The sensor is high in sensitivity, low in cost, free of radiation, simple and portable, and can realize nondestructive monitoring. An imaging result can be compared with a shot test piece picture. The defect that there is no verification method for the imaging result of the traditional sensor is overcome, and a scientificbasis is provided for mastering the transmission rule of moisture in concrete and conducting research on the durability of concrete.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY

Image-sensor-based detection system of colloidal gold immunoassay

The invention discloses an image-sensor-based detection system of colloidal gold immunoassay and belongs to the field of the colloidal gold immunoassay. The detection system is as follows: a test strip placing platform for placing a test strip is arranged on a test strip detection platform; an illumination module and an imaging module are arranged above the test strip placing platform of the test strip detection platform; the illumination module consists of an illumination light source and a light homogenization unit arranged below the illumination light source; the illumination light source is a hollow annular light-emitting diode array light source formed by means that a plurality of light-emitting diodes are uniformly formed in an annular array; an image sensor of the imaging module uses a CMOS image sensor and the signal output end of the imaging module is electrically connected with the input end of a data collecting and processing device. The system adopts the annular matrix illumination and is provided with the light homogenization unit so that output light is homogenized and the detection result is accurate; the imaging module adopts the CMOS image sensor, so that the collection speed is high, and the requirement of dynamically tracking and observing the reaction process can be met.
Owner:SHANGHAI YAOYAN PHOTOELECTRIC SCI & TECH
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