25results about How to "Improve detection depth" patented technology

The invention discloses an enhanced photoacoustic microscopic imaging method based on physical degradation learning, which comprises the following steps of: on the basis of a photoacoustic imaging principle, degrading an image of a real photoacoustic microscopic image to the ground into a low-quality photoacoustic microscopic image through physical model degradation learning with variability. A high-quality photoacoustic microscopic imaging image is used as a target of supervised training, deep learning is used as a basis, the high-quality photoacoustic microscopic imaging image is input into a self-designed convolutional neural network with an attention mechanism for network training, the quality of a reconstructed image is evaluated until the reconstruction quality reaches the standard, and otherwise, the above steps are executed again. And inputting a real low-quality photoacoustic image into the trained neural network to obtain a reconstructed high-resolution photoacoustic image. According to the method, the resolution ratio and the contrast ratio of the deep photoacoustic microscopic image can be effectively improved, meanwhile, the photoacoustic microscopic image can be denoised, the dependence on the data set can be effectively reduced due to the fact that the data set is obtained through the physical model, and the reconstruction effect under different environments can be improved.

The invention relates to a photo-thermal microscopic imaging system and method based on a cyclic generative adversarial neural network, and belongs to the technical field of photo-thermal science and detection and signal processing. Comprising a reflector, a sleeve lens, a first slide, a scanning lens, a platform, a galvanometer controller, a dichroscope, a polarization cube, a reflector group, a second slide, a third slide, a spatial light filter, an acousto-optic modulator, a first optical filter, a polarization cube, a fourth slide, an exciting light source, a polarization cube, a spatial light filter and a second optical filter. A probe light source; and a photo-thermal microscopic imaging system. According to the method, the three-dimensional diffusion of the heat flow is fully utilized, and the defect is accurately reconstructed from a two-dimensional angle by changing different spatial fluctuation states of the heat flow, so that the detection depth and the detection efficiency are improved, and meanwhile, the quantitative characterization of the material and the three-dimensional chromatography reconstruction of the geometric structure can be realized; according to the method, efficient and accurate detection and three-dimensional feature reconstruction of superficial layer defects of composite materials, metal materials and high-molecular polymers are achieved.

The invention relates to the technical field of physical exploration, and discloses a vehicle-mounted multi-channel transient electromagnetic observation system and an observation system.The observation system comprises a tractor providing traction power, a dragging observation platform connected with the tractor through a traction component, and a transceiving controller placed in the tractor, the transceiving controller comprises a multi-channel transmitting system and a multi-channel receiving system; the towed observation platform is used for carrying at least five receiving and transmitting integrated antennas, and the receiving and transmitting integrated antennas are arranged on the towed platform in an array mode; the multi-channel transmitting system is used for providing bipolar current signals for the receiving and transmitting integrated antenna; the multi-channel receiving system is used for receiving transient electromagnetic signals fed back from the underground through the receiving and transmitting integrated antenna; the transient electromagnetic observation system solves the problems that an existing transient electromagnetic observation system is low in detection efficiency and poor in measurement accuracy.

The invention belongs to the technical field of transient electromagnetism, and particularly relates to a ground array type three-dimensional transient electromagnetic detection method, which comprises the following steps of: 1, designing and planning a three-dimensional measurement network according to a detection task, obtaining coordinates of each sensor node, and forming a sensor array; 2, conveying the sensor to a corresponding coordinate point, synchronously transmitting a signal, and carrying out data synchronous acquisition; and step 3, processing and visualizing the collected data so as to carry out interpretation. According to the invention, simultaneous detection of a plurality of measurement points in a measurement area can be realized, so that a three-dimensional electrical structure image of an underground medium can be constructed, the electromagnetic field intensity of excitation can be greatly enhanced, the signal-to-noise ratio and the detection depth of a measurement signal can be improved, and the electrical distribution characteristics of the underground medium can be reflected more truly; the multiplicity of solutions is reduced, and the accuracy and reliability of exploration results are improved.

The present invention discloses a submarine ultrasonic non-destructive testing wall-climbing robot vehicle adsorbed by a thruster. It includes a vehicle body, and a thruster, an ultrasonic non-destructive testing device and a motion mechanism installed on the vehicle body; the thruster includes a motor, a blade, a shell, a bracket, front and rear end covers and a control system; the ultrasonic non-destructive testing device includes a pair of TOFD probes, a camera, a waterproof lamp, a clamping mechanism and a lead screw moving scanning mechanism; the motion mechanism includes wheels and a driving mechanism; the vehicle body is used to place the wheel driving mechanism, circuits and circuit boards. The number and layout of the thrusters used in the present invention play a decisive role in the entire set of equipment, which can generate thrust to make the robot vehicle adsorbed on the submarine pipeline and perform stable circumferential motion. During the movement, the robot vehicle performs internal defect detection on the submarine pipeline through a pair of probes. The present invention has a reasonable structure, stable movement, and ultrasonic detection function, which can realize the automation of submarine pipeline operation and maintenance, and ensure the safety of employees while improving efficiency.

The present invention belongs to the field of full-time domain induced polarization detection, and provides a ground and tunnel joint full-time domain induced polarization advance detection method and system, which obtains geological survey data of the target detection area; determines the layout scheme of the ground and tunnel joint full-time domain induced polarization device based on the acquired geological survey data of the target detection area; obtains actual observation data based on the arranged ground and tunnel joint full-time domain induced polarization device; performs full-time domain induced polarization inversion in combination with the actual observation data, obtains the polarizability, resistivity and relaxation time distribution of the target area in front of the tunnel face, and then obtains the position and morphology information of the water-bearing geological structure. It solves the problems of limited layout of small electrodes in the tunnel space and inconvenient movement of large-volume transmitters.

The invention discloses a food mechanochemical inspection and testing equipment, which relates to the technical field of mechanochemical inspection equipment, and comprises a mounting base, a rotating adjustment component is mounted on the top of the mounting base, a synchronous adjustment component is mounted on the side end of the rotating adjustment component, and a detection data quantity display screen is mounted on the side end surface of the top wall of the mounting base. By cooperating with the synchronous adjustment component and the pretreatment detection component, it is possible to effectively perform inspections and tests with high precision and high sensitivity when detecting trace components or facing complex matrices, thereby ensuring the reliability of the detection results, realizing the synchronization and integration of material processing and detection, improving the adaptability and accuracy of sample processing, greatly improving the operating efficiency and detection accuracy, and with the cooperation of various detection components, realizing automatic switching and precise positioning of various detection modes, greatly expanding the detection range and depth, and further improving the accuracy of the detection data.

The invention relates to a tower-shaped test and penetration test inspection method for a large-diameter tube blank. According to the method, the defects of different depths below the surface can be effectively evaluated, and the detection rate of micro hairlines (lt: 0.5 mm) is obviously improved; the distribution rule of the defects in the radial direction and the axial direction of the pipe blank is obtained, and a direction is provided for process improvement; according to the invention, by quantizing data, human experience misjudgment is avoided, and the reliability of quality control is improved; the method is particularly suitable for large pipe blanks, and fills the blank of precision defect detection of the size section.

The present invention relates to the field of concrete material detection technology, in particular to a method for detecting cracks in a concrete structure based on quantum measurement technology, comprising the steps of: S10, emitting a concrete particle beam perpendicular to the plane, scanning and detecting from one side of the plane to the other side, converting the received electromagnetic particle representation physical quantity to obtain electrical signal data, recording the first position of the detection point when the electrical signal data changes for the first time and the second position of the detection point when the electrical signal data changes for the last time; S20, scanning and detecting based on the second direction of the plane, recording the third position and the fourth position of the detection point when the electrical signal data changes for the first time and the last time; S30, setting a plurality of detection points within the range defined by the first, second, third and fourth positions, and determining the size parameters of the cracks according to the electrical signal data of all detection points. The present invention can not only improve the efficiency of concrete detection, but also make great technical progress in the field of concrete detection.

This invention provides a method, system, and electronic device for detecting application behavior, relating to the field of computer security technology. The method includes: collecting system call data of a target application in user mode and kernel mode; extracting basic statistical features representing the statistical regularity of the calls and deep sequence features representing the correlation between the calls from the system call data, forming a system call feature set; and inputting the system call feature set into a behavior detection model trained based on a normal behavior feature library for analysis to obtain behavior detection results. This invention achieves full-stack, blind-spot-free monitoring of application behavior by simultaneously collecting system call request context in user mode and actual execution data in kernel mode, improving the accuracy and reliability of behavior detection. Furthermore, by constructing a hierarchical feature system combining basic statistical features and deep sequence features, it greatly enhances the detection depth and sensitivity for new and complex threats.

This invention relates to the field of identification technology for precious woods and medicinal materials, particularly a method for non-destructive testing of agarwood based on micro-CT to determine its authenticity and quality. The technical solution includes: acquiring complete three-dimensional data of the agarwood interior through micro-CT non-destructive scanning; extracting characteristic parameters such as the three-dimensional topological structure of the interstitial phloem, the distribution and fullness of agarwood resin, and abnormal structures; identifying authenticity by comparing these parameters with a pre-built database, particularly effective in identifying internal forgery traces such as high-pressure oil injection and mechanical compression; simultaneously, using a multi-parameter fusion model to quantitatively evaluate the spatiotemporal distribution characteristics of agarwood resin and the proportion of resin-containing interstitial phloem to determine its quality grade; achieving comprehensive, objective, and non-destructive testing of agarwood from the inside out, from authenticity to quality, especially suitable for identifying high-end crafts, collectibles, and precious agarwood raw materials, solving the industry pain point that traditional destructive testing methods cannot be applied to intact products.

The invention discloses a fluorescent self-early-warning anticorrosive coating as well as a preparation method and application thereof. The coating comprises epoxy resin coupled with probe molecules. The fluorescence emission wavelength of the probe molecule is located in a near-infrared region, and the fluorescence intensity can be enhanced under an acidic condition, so that the detection reliability of the self-early-warning anticorrosive coating and the detection depth of an early-warning signal are improved; according to the acidic pH response type fluorescent self-early-warning anticorrosive coating disclosed by the invention, coating cracks in different shapes can be accurately detected; the acidic pH-responsive fluorescent self-early-warning anticorrosive coating provided by the technical scheme of the invention has good stability, can perform long-time early warning on the anticorrosive coating, and provides long-term protection for ships.

The invention belongs to the technical field of nuclear magnetic resonance logging, and discloses a nuclear magnetic resonance logging instrument probe. Comprising a center support, a magnet assembly, a magnet protection shell, a magnetic core assembly and a magnetic core protection shell. The central support is provided with a mounting shaft and radial limiting parts at two ends. The magnet assembly is mounted on the mounting shaft, is positioned between the two limiting parts, comprises a first semi-cylinder group formed by splicing a plurality of small magnets on the upper side and a second semi-cylinder group formed by splicing a plurality of large magnets on the lower side, and is used for generating a radially enhanced static magnetic field. And the magnet protection shell is formed by buckling an upper shell and a lower shell which respectively cover the first semi-cylinder group and the second semi-cylinder group. The arc-shaped magnetic core assembly is attached to the periphery of the upper shell to guide a magnetic circuit and enhance a radio frequency magnetic field, and the outer side of the arc-shaped magnetic core assembly is coated with a magnetic core protection shell connected with the magnet protection shell. The magnetizing directions of the large and small magnets are tangentially arranged along the circumference of the probe; and the lower shell is made of a magnetic conductive material to form a magnetic shielding structure for shielding a stray magnetic field at the bottom. The probe can significantly increase the detection distance.

The present application relates to the technical field of computer software security, and specifically discloses a multi-agent collaborative arrangement method and system based on software supply chain security detection, wherein a task disintegration and stage arrangement engine is constructed to organize multiple special security detection agents such as SCA agents, code audit agents and license detection agents into a directed acyclic graph type detection pipeline; a task state machine is used to manage the life cycle state of each detection node, and asynchronous queues are used to realize decoupled communication between agents; the scanning results of upstream agents are used as the task input and strategy parameters of downstream agents to realize result-driven dynamic arrangement; and a failure node compensation mechanism is used to automatically retry or degrade and replace abnormal detection nodes to ensure the integrity of the overall detection task and improve the reliability and integrity of software supply chain security detection.

The invention discloses a far detection nuclear magnetic resonance logging instrument probe, which relates to the technical field of petroleum logging, and comprises a protective shell, a support piece, a magnet assembly, a magnetic core assembly and a detection antenna, a protection cavity is formed in the protection shell; the magnet assembly comprises a main magnet and two sets of auxiliary magnets which extend in the axial direction of the protection cavity. The main magnet is arranged in the middle of the protection cavity and is symmetrical about the supporting piece, and at least part of the outer wall surface of the main magnet is a convex arc surface; the two sets of auxiliary magnets are arranged on the two sides of the main magnet in the axial direction of the protection cavity, and the sets of auxiliary magnets are symmetrically arranged relative to the supporting piece. The magnetic core assembly is arranged in the protection cavity and extends in the axial direction of the protection cavity, and the magnetic core assembly is arranged on the outer side of the main magnet and is symmetrical about the supporting piece. The detection antenna is arranged on one side in the protection cavity and fixedly attached to the outer wall face of the magnetic core assembly on the two sides of the supporting piece, and the detection antenna is electrically connected with an external detector. According to the probe of the far detection nuclear magnetic resonance logging instrument, the detection depth can be increased.

The invention belongs to the technical field of oil and gas intelligent drilling, and particularly relates to an electromagnetic wave adaptive frequency selection method, system and device. The method comprises the following steps: receiving a starting instruction, and sending a sweep frequency emission control decision; an echo signal is read, and the optimal working frequency is determined according to the echo signal; the echo signal is a result returned by emitting electromagnetic waves according to the frequency sweep emission control decision; sending out an optimal work control decision according to the optimal work frequency; the optimal work decision is used for guiding the work content executed by the electromagnetic wave adaptive frequency selection device in the current bottom layer environment. After entering a reservoir stratum, a high-frequency electromagnetic wave transmitting circuit performs frequency sweeping within a certain bandwidth, a receiving end detects the strength of a direct wave signal, the corresponding frequency when the strength of the received direct wave signal is the highest is the optimal working frequency of a transceiving antenna, and the information is fed back to the high-frequency electromagnetic wave transmitting circuit; and then transmitting at the same frequency.

The embodiment of the invention provides a cable sheath defect detection method and device based on ultrasonic guided waves. The method comprises the following steps: generating an ultrasonic guided wave excitation signal; applying an ultrasonic guided wave excitation signal to a cable corrugated aluminum sheath through an emission sensor; receiving an ultrasonic guided wave signal reflected from the cable corrugated aluminum sheath through a receiving sensor; analyzing the reflected ultrasonic guided wave signal to detect defects in the cable corrugated aluminum sheath; wherein the step of analyzing the reflected ultrasonic guided wave signal comprises the substeps of identifying a direct wave, a defect echo and an end face echo in the reflected ultrasonic guided wave signal; defect types and severity are determined based on at least one feature of the defect echoes, the defect types including at least one of an ablation defect, a manufacturing defect, and an external damage defect. The characteristic of high penetrability of ultrasonic guided waves is utilized, internal and deep defects of the aluminum sheath are effectively detected, the detection precision and depth are remarkably improved, a single low-frequency mode is combined with a clear criterion, and rapid and accurate distinguishing and positioning of defect types are achieved.

To address the limitations of existing chopping decoupling methods, such as waveform distortion and residual interference, which cause weak induced polarization (IP) signals at deep depths to be submerged by noise and fail to meet the requirements for deep ore body identification, this invention provides a half-wave decoupling method and apparatus for IPD detection based on multi-level transmission. By employing single-field-source multi-level transmission technology at the transmitting end, a multi-level signal waveform is synthesized to provide a waveform signal for decoupling at the receiving end. Furthermore, at the receiving end, a translation-convolution decoupling method is proposed. Through waveform translation, frequency-division convolution, and signal amplitude compensation, the electromagnetic coupling signal and the effective IPD signal are accurately separated, avoiding the loss of effective signal in traditional chopping decoupling methods.

The present invention belongs to the field of optical near-infrared fluorescence imaging and biomedical engineering, and relates to a method for estimating the full-link signal-to-noise ratio of a fluorescent endoscope. The method for estimating the full-link signal-to-noise ratio of a fluorescent endoscope provided by the present invention can establish a theoretical signal-to-noise ratio model of excitation light and fluorescence by tracking the radiation transmission process and the full-link imaging process of the fluorescent endoscope illumination beam, providing a theoretical method for further determining the working distance of the fluorescent endoscope, and providing theoretical guidance for the reasonable allocation of the overall design indicators of the endoscope. The method for estimating the full-link signal-to-noise ratio of a fluorescent endoscope provided by the present invention can solve the problem of separation between the signal-to-noise ratio evaluation of fluorescent endoscope imaging and the actual physical process, provide a theoretical basis for improving the detection depth and sensitivity of micro-tumors and metastatic lesions, and promote the clinical application of fluorescent endoscopes.

The application discloses a near-infrared fluorescent probe for detecting viscosity of liquid food, and a preparation method and application thereof. The fluorescent probe is 2-(2-6-(diethylamino)-1,2-dihydrocyclopenta[b]chromen-3-yl)vinyl)-3-ethyl-1,1-dimethyl-1H-benzo[e]indol-3-ium salt. The fluorescent probe contains two kinds of rotor elements, i.e. a vinyl bond and a single bond, which is beneficial to sensitive response of the probe to viscosity change. The probe has a long emission wavelength in a high-viscosity solvent, which can reach 787 nm, and has strong fluorescence penetration, low background interference and high signal-to-noise ratio. In addition, the probe has good selectivity for the high-viscosity solvent and high sensitivity, and therefore, the probe can be applied to detection of viscosity of liquid food.

This invention discloses a quantitative detection method for the conductivity of solid conductive media using inductive magneto-thermo-acoustic methods, belonging to the field of non-destructive testing technology. It establishes a quantitative mapping relationship between ultrasonic measurement signals and conductivity distribution by deeply analyzing the multi-field coupling relationship of solid conductive media under pulsed electromagnetic excitation; constructs a mathematical model of magneto-acoustic-thermo-acoustic multi-field coupling under solid constraint conditions to accurately solve the forward problem of electromagnetic and acoustic fields; optimizes the excitation and receiving system parameters to improve detection resolution and signal-to-noise ratio; reconstructs the sound source term using a time-inversion method-compressed sensing joint algorithm, and achieves quantitative conductivity inversion using a least-squares iterative algorithm based on Lorentz force divergence-thermal function; quantifies and calibrates the inversion results to ensure detection accuracy; reconstructs the conductivity distribution using imaging technology to identify abnormal regions; and finally generates a standardized detection report.

This invention relates to a dynamic detection method for the roundness fluctuation of the inner ring of a bearing in the field of bearing testing technology, comprising the following steps: S1, supporting the outer ring of the bearing with non-contact magnetic force and actively stabilizing the outer ring in a preset spatial posture; S2, applying a preset multi-dimensional dynamic excitation force to the outer ring of the bearing; S3, driving the inner ring of the bearing to rotate around its axis. This invention combines non-contact magnetic support and stabilization of the outer ring with independent driving of the inner ring rotation, so that the bearing under test is in a dynamic condition that is closer to the actual complex support state, thereby stimulating a more realistic and richer dynamic fluctuation signal. Based on the dynamic response signal, the dynamic roundness fluctuation component caused by the roundness error of the inner ring raceway is separated and quantified by a coupling and decoupling algorithm.

An ophthalmic measuring system with an optical path compensation deflection mechanism comprises an OCT light source, a reference arm, a sample arm module, an optical fiber coupler, a detector and the optical path compensation deflection mechanism. The sample arm module comprises a light path switching scanning device which can reflect detection light to a posterior segment or anterior segment light path. The optical path compensation deflection mechanism comprises a rotating mechanism and an optical path compensation deflection assembly. According to the mechanism, the optical path can be dynamically adjusted, the A-Scan optical path or phase change is kept constant, the Doppler frequency shift effect is simulated, and hardware cost does not need to be increased. The system can avoid using a carrier frequency adding technology in a preview stage, so that sampling requirements are reduced, and the cost is reduced. During measurement, shallow detection depth is adopted, the to-be-measured eye is quickly aligned, and the accuracy is improved. Fast switching of scanning modes allows for accurate measurement of ocular axial length, anterior chamber depth, and lens thickness. The invention provides an ophthalmology OCT imaging solution which is high in cost benefit, easy and convenient to operate and accurate in measurement, and the clinical diagnosis requirement is met.

The invention provides an ophthalmology measurement system based on a carrier frequency loading device, which comprises an OCT light source, a reference arm, a sample arm module, an optical fiber coupler and a detector, and is characterized in that the sample arm module is integrated with an optical path switching scanning device and can reflect detection light to a posterior segment or anterior segment optical path. The optical path is dynamically adjusted by introducing a carrier frequency adding device, the A-Scan optical path or phase change is kept constant, Doppler frequency shift is achieved, and the detection depth is enhanced without losing resolution. The system can quickly switch imaging focuses to adapt to eyes with different eyesight, and refraction compensation is carried out to obtain high-resolution OCT (Optical Coherence Tomography) images. In addition, the system can accurately measure key parameters such as corneal curvature, thickness, anterior chamber depth, crystalline lens thickness and the like, and the diagnosis speed is effectively improved. According to the invention, while the imaging quality is ensured, the limitations on detection depth, imaging speed and precision in the prior art are solved.

The application provides a kind of three-dimensional lake blue-green algae biomass spectrum detection system, comprising: host computer and probe;Host computer and probe are connected by optical fiber;Light source emits light beam to light source reflection coating, produces diffuse reflection light beam to detection warehouse;Water tower head is arranged on the other side of detection warehouse, for the water body from detection warehouse is extracted after detection is completed;Collimating lens group is arranged on the top surface of detection warehouse, for imaging to the water body to be measured;Collimating lens group is connected with optical fiber through connecting device, and then connected with optical fiber switching structure and optical fiber spectrometer through optical fiber respectively.Diffuse reflection light beam enters the inside of detection warehouse through light inlet hole and irradiates the water body to be measured, and then the image is transmitted to optical fiber spectrometer through optical fiber after collimating lens group imaging, to obtain the spectral data of the water body to be measured.The application has the advantages of practical, portable, low cost and low power consumption.