19results about How to "Guaranteed SNR" patented technology

The invention discloses a magnetic resonance imaging ion concentration real-time detection method for an aqueous ion battery. The method comprises the following steps: SO, assembling the aqueous ion battery; the method comprises the following steps: S1, putting an aqueous ion battery into a detection area of a magnetic resonance imager, and connecting an electrochemical workstation; s2, determining an area where an electrode-electrolyte interface is located through a magnetic resonance imager; and S3, electrifying, and acquiring two-dimensional image data of a collector-electrolyte interface at equal intervals to obtain a characterization map of the ion concentration of the electrolyte. The method is suitable for the magnetic resonance imager to detect the battery in an in-situ experiment, the ion concentration information of the aqueous ion battery-electrode interface can be obtained, so that deposition and stripping of electrode interface metal are analyzed, the control sensitivity is high, the detection result is stable and reliable, and the method has the possibility of wide popularization.

This invention discloses a multi-channel programmable miniaturized high-speed FBG demodulation system and method based on an AWG (Optical Fiber Optic Generator), belonging to the field of fiber optic sensing technology. The AWG-based multi-channel programmable miniaturized high-speed FBG demodulation system includes a high-stability broadband light source module, a low-loss isolation module, a miniaturized programmable fiber optic amplifier, a circulator, a two-stage miniaturized high-speed optical switch, a high-crosstalk AWG module, a photoelectric conversion module, a programmable A / D conversion module, and a core control module. The AWG-based multi-channel programmable miniaturized high-speed FBG demodulation method involves the optical signal entering an FBG sensor array, the FBG sensor reflecting the optical signal, the reflected optical signal entering the AWG module, and the output light undergoing photoelectric conversion to calculate the center wavelength of the FBG sensor. This invention, based on an AWG, improves demodulation accuracy while ensuring the demodulation range, achieving continuous wavelength demodulation within the AWG wavelength range.

The present invention belongs to the field of magnetic resonance technology, specifically a magnetic resonance imaging device for simultaneous scanning of both knees, both ankles or both lower limbs, comprising: a convex lower hard structure body and a T-shaped upper soft-hard integrated structure; wherein the convex lower hard structure body comprises a bottom plate and a convex structure arranged in the middle of the upper surface of the bottom plate, the convex structure is a hollow frame with an upper opening, and baffle clamps are arranged on both sides of the upper surface of the bottom plate; the T-shaped upper soft-hard integrated structure comprises a hard structure body and two-wing flexible structures arranged on both sides of the hard structure body, and the lower surface of the hard structure body is connected with a middle combination card block; the bottom plate, the hard structure body, and the two-wing flexible structures are all provided with radio frequency circuits. The imaging efficiency of the present invention always maintains an optimal state, ensuring the performance of the signal-to-noise ratio, which means that more delicate diagnostic data can be obtained with a shorter inspection time for clinical purposes.

This application provides a laser power detection device and laser processing equipment, relating to the field of laser power measurement and monitoring technology. The laser power detection device includes a focusing element, a first neutral density filter, a second neutral density filter, and a photodetector module arranged sequentially along the optical axis. The detection beam undergoes staged energy attenuation through the two neutral density filters before entering the photodetector module for power detection, thereby avoiding damage caused by direct high-power-density laser light incident on the photodetector module. The distance between the focusing element and the first neutral density filter is smaller than the distance between the first and second neutral density filters, ensuring that the detection beam incident on the first neutral density filter still maintains a large spot size, achieving low power density attenuation. Simultaneously, the focal point of the reflected light from the second neutral density filter is located on the side of the focusing element closer to the first neutral density filter. The reflected light, after being focused, diverges and is absorbed by the inner wall of the device, avoiding stray light crosstalk and ensuring the signal-to-noise ratio of the device.

The utility model provides a communication pipeline of a communication system, and relates to the technical field of communication pipelines, a pipeline and a pipeline mechanism, the pipeline mechanism is arranged on the inner side of the pipeline, through the arrangement of the pipeline mechanism, when the communication pipeline is used, through the arrangement of a protection assembly, a waterproof layer can prevent water from permeating into the pipeline from the outside of the pipeline, and the communication pipeline is convenient to use. The anti-corrosion layer can resist corrosive substances outside the pipeline, materials of the pipeline are prevented from chemical reaction, dryness and quality of the pipeline are guaranteed, the buffer assembly is arranged, the heat preservation layer can prevent the temperature inside the pipeline from being affected by external temperature change, and expansion or contraction of the pipeline is avoided. The size and the shape of the pipeline are affected, the stability and the strength of the pipeline are guaranteed, the pressure resistance of the pipeline can be improved through the supporting assembly, the safety and the integrity of the pipeline are guaranteed, interference outside the pipeline can be shielded through the shielding assembly, and the signal-to-noise ratio and the efficiency of the pipeline are guaranteed.

This application discloses a method, apparatus, electronic device, and storage medium for widening the frequency band of seismic data. The method includes: acquiring a second frequency spectrum with an effective bandwidth from a first frequency spectrum of the original seismic data in a target area; identifying coherent components of the second frequency spectrum at different frequencies; determining the energy weighting coefficients of the coherent components based on the expected bandwidth and effective bandwidth of the original seismic data; performing energy modulation on the coherent components based on the energy weighting coefficients to obtain modulated coherent components; identifying a third frequency spectrum after bandwidth widening based on the modulated coherent components and the second frequency spectrum; and performing time-frequency analysis and inverse transformation processing on the third frequency spectrum to obtain the bandwidth-widened seismic data corresponding to the original seismic data. This effectively widens the frequency band of seismic data while ensuring the signal-to-noise ratio of the seismic data, thereby improving the accuracy of identifying oil and gas target areas.

The present invention provides a method and device for suppressing crosstalk between axes of a multi-axis silicon photonic gyroscope. The crosstalk suppression method includes: connecting the optical path and circuit of the silicon photonic gyroscope, connecting the modulation electrode of the phase modulator of each channel to an independent signal generator, and connecting the detector output of each channel to an oscilloscope; controlling each signal generator to apply a square wave modulation signal to the modulation electrode; adjusting the frequency of the square wave modulation signal output by each signal generator so that the detector of the channel outputs a main signal waveform; collecting the crosstalk amplitude and rise delay of any other channel received in the sampling interval of each channel through an oscilloscope; determining the crosstalk characteristic parameters of any other channel received by each channel; replacing the signal generator with a signal detection output modulation signal; for each channel, judging the similarity between the output signal of the detector and the crosstalk characteristic parameters of any other channel, and then judging whether the output signal is a crosstalk signal; using borrow accumulation for the crosstalk signal, and using digital accumulation for the non-crosstalk signal. The crosstalk suppression method and device can effectively suppress the crosstalk noise between axes of a multi-axis silicon photonic gyroscope.

The invention discloses a driving system and a measuring method for inhibiting micro resistance measuring errors, and belongs to the field of precision measurement. The problem that a driving system for measuring the micro resistance is difficult to suppress low-frequency noise and cannot measure the micro resistance at high precision is solved. The driving system is used for converting low-frequency voltage signals of the high-voltage end and the low-voltage end of a resistor to be measured into high-frequency voltage signals, the driving system is constructed through JFET switch tubes K1 and K2, and a transient compensation circuit is used for restraining transient voltage of the JFET switch tube K1. The switching tube driving circuit is used as a feedback loop to ensure that the gate-source voltage of the JFET switching tubes K1 and K2 is zero, and mutation caused by noise is suppressed. The device and the method are mainly used for high-precision micro resistance measurement.

The invention relates to a multi-target detection method, which comprises the following steps of: based on multidirectional anisotropic filtering, effectively decoupling track main body texture and environmental background noise, and remarkably improving the feature expression capability and the signal-to-noise ratio in a low-contrast and complex texture environment; the fracture area of the track caused under the severe working conditions of partial shielding, light reflection and the like is positioned and repaired, and the connectivity and integrity of the output track on the topological level are guaranteed; by constructing a feasible region mask surrounding an orbit, spatial semantic ambiguity caused by a monocular vision perspective effect is eliminated, it is ensured that foreign matter alarm is strictly limited in a physical dangerous region, and the false alarm rate is greatly reduced. Through simultaneous extraction of the railway track topological structure and troubleshooting of the foreign matter risk in the track area, the detection precision under the complex working condition is significantly improved.

The invention discloses a metasurface-based optical atom magnetic sensor four-channel polarization decoupling detection method, and aims to solve the problems that a detection end of a single-beam atom magnetometer is large in size and is easily interfered by pump light ellipticity fluctuation. The technical scheme of the invention is as follows: a four-channel focusing metasurface device integrated with a sub-aperture pseudo-random spatial multiplexing nano-pillar array is utilized to replace a discrete component in a traditional detection light path, and a single beam of detection light carrying magnetic field information is directly separated in space and is focused into four independent light spots of left rotation, right rotation, 45 degrees and 135 degrees at the same time; common-caliber uniform sampling of the Gaussian beam cross section is realized through pseudo-random arrangement; the signal processing system inverts the ellipticity of the pump light in real time by using a circular polarization channel, extracts a magnetic field signal by using a linear polarization channel, and performs dynamic correction through a full-polarization decoupling algorithm. According to the invention, chip-level integration of the magnetometer is facilitated, and high-sensitivity and high-stability anti-interference measurement is realized.

This application relates to a continuous four-pulse quantum gyroscope, comprising: a magnetically shielded barrel, and a preparation module and an interference module arranged vertically within the magnetically shielded barrel; a detection module is arranged horizontally on one side of the preparation module within the magnetically shielded barrel; the preparation module is used to cool the input atomic beam to produce a cold atomic beam, and throw the cold atomic beam into the interference module in a vertically upward or obliquely upward direction; the interference module is used to perform interference processing on the cold atomic beam; the detection module is used to detect the fluorescence intensity corresponding to the cold atomic beam passing through the detection module, and send the fluorescence intensity to a processor, so that the processor determines the change in the number of atomic states based on the fluorescence intensity, and extracts the angular velocity from the change in the number of atomic states. This eliminates the loading time in traditional cold atomic cluster schemes, thereby achieving high bandwidth and high update rate real-time angular velocity output.

This application relates to the field of liquid level sensor technology and discloses a V-type liquid level sensor, comprising: a light-emitting diode (LED) and an embedded polarization-maintaining fiber optic sensing probe respectively installed in a mounting groove; the LED is tilted relative to the horizontal line; the LED and the embedded polarization-maintaining fiber optic sensing probe are connected to an electronic circuit board; and a light-transmitting plate is respectively installed on the outer opening of the mounting groove. The embedded polarization-maintaining fiber optic sensing probe consists of two or more embedded polarization-maintaining fibers. The split polarization-maintaining fiber of the embedded polarization-maintaining fiber is connected to the front end of the combined polarization-maintaining fiber through a split end taper, and the rear end of the combined polarization-maintaining fiber is connected to a single-mode fiber through a combined end taper. This application reduces the interference of environmental moisture on the refracted light path by using an infrared LED and an tilted incident design. By using an embedded polarization-maintaining fiber optic sensing probe and a tapered coupling structure of the split and combined end tapers, environmental interference is removed, and the light beam is efficiently focused to the single-mode fiber, thereby improving the light signal intensity.

The present invention relates to the field of image processing and imaging technology, and specifically to a low-pass response system imaging method based on point spread function quasi-pulsation, comprising: obtaining the spectrum of the point spread function according to the autocorrelation function of the output image of the low-pass response system; designing the spectrum of the desired output point spread function; applying quasi-pulsation processing to the imaging result, and improving the resolution of the image by adjusting the width of the point spread function. The present invention proposes a new imaging data processing method for a low-pass response imaging system to reduce the width of the point spread function, improve the resolution, and thus improve the image clarity and detail recognizability.

The invention provides a formation-constrained well control GRAN seismic signal broadband reconstruction method, belongs to the technical field of geophysical exploration, and solves the problem of seismic signal resolution in an oil-gas exploration process. Comprising the following steps: S1, acquiring well location data, and generating and expanding a tag training data set by combining a sequential Gaussian simulation method according to target reservoir features; s2, constructing a GRAN model; training a data set by using the expanded label, training the nonlinear mapping capability of the model in the process of converting the seismic signal from a narrow band to a wide band, and performing model testing by using a distributed external sample after training is completed; s3, using the GRAN model passing the test to perform a conversion process from a narrowband to a broadband on an actual seismic signal to obtain a seismic signal with high resolution; according to the method, seismic narrow-band signals are converted into broadband signals, the signal-to-noise ratio of the seismic signals can be kept while the seismic signal resolution is improved, and meanwhile the model accuracy and generalization ability are guaranteed.

The embodiment of the invention provides an image acquisition method, an image acquisition device and electronic equipment, which are used for solving the problem that the image quality and the information integrity are influenced in related technologies. The image of the shooting scene is divided into the preset number of blocks, the bright blocks and the dark blocks are determined according to the bright region threshold value and the dark region threshold value, the first average value of the brightness of the pixel points of each bright block and the second average value of the brightness of the pixel points of each dark block are calculated, and the scene dynamic value is obtained through the ratio of the first average value and the second average value. The scene dynamic value can reflect the brightness difference degree of the bright area and the dark area of the shooting scene. The method comprises the following steps: determining a first exposure ratio of a long frame to a middle frame and a second exposure ratio of the middle frame to a short frame according to a scene dynamic value, adjusting exposure parameters of the middle frame and the short frame, ensuring that the long frame, the middle frame and the short frame cover a complete dynamic range from a dark part to a bright part, avoiding information loss, and determining exposure parameters of the long frame according to target brightness so as to improve the image quality. The problems of bright area overexposure and dark area underexposure can be effectively solved, and the image quality is improved.

The invention belongs to the technical field of magnetic resonance, and particularly relates to a magnetic resonance imaging device for simultaneous scanning of knees, ankles or lower limbs, which comprises a convex lower hard structure main body and a T-shaped upper soft and hard integrated structure, wherein the convex lower hard structure body comprises a bottom plate and a convex structure arranged in the middle of the upper surface of the bottom plate, the convex structure is in a hollow frame shape with an opening in the upper portion, and baffle clamps are arranged on the two sides of the upper surface of the bottom plate; the T-shaped upper soft and hard integrated structure comprises a hard structure body and two-wing flexible structures arranged on the two sides of the hard structure body, and the lower surface of the hard structure body is connected with a middle combined clamping block; and radio frequency circuits are arranged in the bottom plate, the hard structure main body and the two-wing flexible structures. The imaging efficiency is always kept in an optimal state, the performance of the signal-to-noise ratio is ensured, and for clinical use, finer diagnosis data can be obtained within shorter examination time.

The invention discloses a dental X-ray tomography system and method based on an intelligent mechanical arm, and relates to the technical field of medical imaging.The method comprises the steps that a high-precision three-dimensional point cloud model of an oral cavity target area is obtained through structured light three-dimensional scanning; generating a collision-free optimal scanning path sequence and a theoretical pose based on the model; controlling the mechanical arm to carry the X-ray source to move along the optimal path and synchronously triggering exposure and image acquisition; the actual pose and the projected image quality of the tail end of the mechanical arm are monitored in real time, and a double-feedback closed loop is formed; calculating a pose compensation instruction and dynamically adjusting exposure parameters; and executing a three-dimensional iterative reconstruction algorithm by using the accurate geometric parameters to generate a cross-sectional image and three-dimensional body data. According to the invention, self-adaptive scanning track planning, dynamic pose error correction, millisecond-level self-adaptive dose regulation and control and end-to-end full-automatic workflow can be realized, the spatial resolution and geometric fidelity of a reconstructed image are remarkably improved, and the radiation dose of a patient is reduced.

The application provides a communication method, device, network equipment, terminal, equipment, medium and product, and relates to the technical field of communication, wherein a base station receives reference signal configuration information; according to the reference signal configuration information, a reference signal is generated and sent on at least one symbol; the reference signal configuration information is used for indicating resource configuration of the reference signal, and the reference signal configuration information satisfies the following conditions: the reference signal has a repeated resource unit occupation mode in each resource block in the same cell; a plurality of resource units of the reference signal allocated to the cell are arranged at equal intervals in the frequency domain in a single resource block; all resource units in the resource block are allocated to the reference signal of one or more cells in each resource block in which resources are allocated to the reference signal; when the reference signal is allocated to a plurality of cells, the reference signals allocated to different cells occupy different resource units. The reference signal of the application can take into account the sensing service and fully improve the spectrum resource utilization rate.

The utility model relates to the technical field of packaging paper feeding and cutting, and discloses a paper material deviation identification structure of chain type transmission paper feeding equipment, which comprises a reinforcing plate arranged on a rack, a connecting frame is arranged on one side of the reinforcing plate, transparent plates are arranged at two ends of one side, close to the reinforcing plate, of the connecting frame, and the transparent plates are connected with the reinforcing plate. A connecting plate is arranged on one side of the transparent plate, a camera module is arranged on the lower portion of the transparent plate, and the camera module completes paper deviation recognition by shooting position limit points of paper. According to the utility model, the identification camera moving platform which is synchronously driven by the double-side offset transmission motor and is matched with closed-loop control is adopted to realize + / -0.1 mm level real-time position tracking and capture 2000fps high-speed displacement change, the rotary cylinder drives the light shielding plate and the identification camera to form time sequence linkage, and the ambient light interference is reduced to below 50Lux by dynamically adjusting the light shielding angle, so that the real-time position tracking is realized. And the signal-to-noise ratio of the image is not less than 35dB.