24 results about "Penetration depth" patented technology

This application relates to the field of quantum nondestructive testing technology, and discloses a quantum detection device and a xenon atom-based eddy current detection method. The quantum detection device includes an interconnected eddy current probe and a quantum measurement device. The quantum measurement device includes a xenon atom gas chamber for measuring the magnetic field strength of a target eddy current magnetic field. It acquires the target eddy current magnetic field of the target object, measures the magnetic field strength of the target eddy current magnetic field, and obtains the magnetic field strength distribution along the surface of the target object. Based on the magnetic field strength distribution, it detects thickness changes in the target object to obtain the weak point detection result. Its beneficial effect is that by measuring the eddy current magnetic field generated by the target object through a xenon atom gas chamber, it effectively utilizes the characteristics of xenon atoms—long coherence time and extremely low resonance frequency—thereby maintaining high sensitivity to capture weak magnetic fields at extremely low frequencies and obtaining a detection penetration depth far exceeding that of traditional sensors, achieving high-precision nondestructive testing of minute thickness differences inside the target object.

The application relates to the technical field of grouting, in particular to Eu 3+ Application of doped high-activity beta-Ca2SiO4 in grouting slurry diffusion tracing. 3+ The doped high-activity beta-Ca2SiO4 endows the beta-Ca2SiO4 with excellent luminescent performance without changing the original performance of the beta-Ca2SiO4, and the excellent luminescent performance can conveniently, directly and quickly trace the penetration depth and flow condition of the slurry. The material has physical and chemical properties similar to those of the actual engineering application material, and is expected to be used as a candidate material for verifying the accuracy of numerical simulation.

The application discloses a residual stress detection method based on chirp electromagnetic surface acoustic wave. Although the existing variable interval coil structure can expand the working frequency band of the sensor, the excitation ability of the low frequency component is limited, and it is difficult to meet the stress detection requirements of large thickness components. The electromagnetic acoustic sensor structure is designed, the width of the coil is continuously changed along the ultrasonic surface wave propagation direction, the wide frequency excitation of the chirp surface wave signal is realized, especially the excitation and propagation effect of the low frequency component is enhanced, so that the signal-to-noise ratio and detection accuracy after the signal matched filtering are significantly improved. The sensor utilizes the characteristics that the penetration depth of the ultrasonic surface wave changes with the frequency, realizes the layered detection of the multi-level residual stress in the material through the chirp signal, can cover multiple frequency ranges to adapt to components with different thicknesses, thereby avoiding the problem that the traditional fixed frequency or variable interval sensor needs to be frequently replaced. The method has high detection accuracy, wide detection range and high detection efficiency, and is suitable for nondestructive residual stress evaluation of metal components and engineering structure health monitoring.

The application discloses a PCB solder paste printing three-dimensional defect detection system based on multispectral imaging, and relates to the field of machine vision detection.The technical scheme points of the application include a multispectral image acquisition module, a four-channel industrial camera based on RGB and near-infrared, and a tunable LED light source array; the reflection characteristic data under different penetration depths are acquired through a wavelength switching mechanism; a motion control trigger module is based on a servo motor driven XYZ three-axis object table, and positioning is realized in cooperation with an encoder feedback; a pulse width modulation signal is adopted to coordinate the camera shutter and the platform moving speed; the application realizes the dual verification of material composition quantitative analysis and three-dimensional topography reconstruction through the combination of the four-channel imaging of RGB and NIR and the Beer-Lambert law modeling, and avoids the limitations of monocular vision; the cross-frame data alignment is realized through the projection of a structured light and a binocular stereo matching technology in cooperation with an ICP algorithm, and the details defects can be better detected.

A method of controlling tint of a tintable window to account for occupant comfort in a room of a building. The tintable window is between the interior and exterior of the building. The method predicts a tint level for the tintable window at a future time based on a penetration depth of direct sunlight through the tintable window into the room at the future time and space type in the room. The method also provides instructions over a network to transition tint of the tintable window to the tint level.

The application discloses a non-ferromagnetic wall thickness quantitative method based on a variable pulse width excitation, and comprises the following steps: a rising edge and a falling edge response of magnetic flux in a pickup coil are picked up through variable pulse width current excitation; with the increase of the pulse width of the excitation current, the signal attenuation of the rising edge speed and the falling edge speed becomes slow; and a feature slope corresponding to different pulse widths is extracted to realize the measurement of the metal wall thickness. The application uses the variable pulse width as the excitation signal, can flexibly control the eddy current penetration depth, realizes the wall thickness quantification from the surface layer to the deep layer, gives the signal dynamic characteristics, and thus higher measurement accuracy and repeatability are realized.

This multilayer substrate (100) provided with a built-in mover comprises: a hollow part (12) provided to a base material (11) formed in multiple layers; a magnet (13) that is a mover accommodated inside the hollow part (12) and formed from a magnetic material; a drive coil (14) provided to the base material (11); strip lines (18, 19) provided to the base material (11); and a shield plate (16) provided to the base material. The thickness of the shield plate (16) is less than the penetration depth of a magnetic field at the frequency of the current flowing through the drive coil (14) in the shield plate (16) and is greater than the penetration depth of radiation at the frequency of a high-frequency signal flowing through the strip lines (18, 19) in the shield plate (16).

This invention provides a method and system for InSAR monitoring of slope hazards using multi-source data, relating to the field of geological hazard monitoring. Addressing the problem of 2-5mm pseudo-deformation signals generated by dielectric constant fluctuations due to changes in soil moisture content under seasonal rainfall, this method establishes a moisture content-temperature correlation model by fusing L-band and C-band SAR images, thermal infrared images, and soil moisture data. It accurately deducts the phase contribution value of pseudo-deformation by utilizing the difference in penetration depth of dual-frequency SAR, thus eliminating pseudo-deformation interference. This method extracts the net deformation sequence by correcting the phase map and combines it with time series analysis of a small baseline set and feature vector construction to accurately identify early signs of slope instability. It effectively solves the problem of difficulty in distinguishing between pseudo-deformation and true deformation at similar magnitudes, significantly improving monitoring accuracy and early warning capabilities, and providing reliable protection for geological hazard prevention and control.

This disclosure relates to a method and apparatus for producing optical elements from curable materials using additive manufacturing technology. According to this disclosure, the method includes: A- providing a curable material; B- curing the curable material within a slice outline (C1), the geometry of which is determined based on the geometry of the optical element, the optical element comprising at least a first volume element (V1) and a second volume element (V2), the first volume element (V1) being formed by irradiating the curable material with at least a first curing surface energy (E1) having a first light penetration depth value (Dp1) within the curable material, and the second volume element (V2) being formed by irradiating the curable material with at least a second curing surface energy (E2) having a second light penetration depth value (Dp2) within the curable material, wherein the second light penetration depth value (Dp2) within the curable material is different from the first light penetration depth value (Dp1) within the curable material.

The present invention relates to a method for evaluating the transparency of skin, the method comprising irradiating evaluation skin with irradiation light and quantifying, by simulation, the amount of irradiation light that has reached a specific penetration depth. The simulation is based on the intensity of reflected light and uses the attenuation coefficient of the skin and the albedo of the skin.

The application discloses a measurement method and a measurement device for the indentation depth of in-situ indentation testing of a high-temperature monitored component, and comprises the following steps: S10, before the indentation testing, speckle marking is performed on the surface of an indenter; S20, during the indentation testing, a real-time temperature field distribution, a real-time speckle distribution and a real-time indentation load of the surface of the indenter are captured; S30, according to the parameters obtained in the step S20, a formula for calculating the elastic compression deformation of the indenter is fitted; the displacement distribution of the indenter is calculated by using a digital image correlation method, and a displacement change formula of different positions of the indenter is fitted, U=U0+f U (L); S50, according to the formula fitted in the step S40, the overall translation U0 of the indenter is obtained, and the indentation depth h t of the indenter after the flexibility compensation is calculated, wherein h t =U0-ΔL. The measurement method adopts a non-contact method to monitor the deformation of the indenter of an indentation testing machine, combines the temperature distribution, compensates the deformation of the indenter, and ensures the accurate measurement of the real indentation depth.

This invention discloses a double-sided precision-printed anti-counterfeiting cigarette inner liner paper and its preparation method. The inner liner paper comprises a directional light-transmitting fiber network structure paper base, a front negative printing layer, a back positive printing layer, and a composite layer. The paper base is manufactured using a three-layer papermaking process. The middle layer undergoes pore-forming treatment to form directional microporous channels with a pore size of 5-15 μm, achieving a light transmittance of 88-92%. The front negative image is printed with high-penetration ink, with a penetration depth of 25-35 μm; the back positive image is printed with controlled-penetration ink containing microcrystalline wax and hydrophobic nano-silica, with a penetration depth of 8-15 μm. Dynamic registration control is achieved using a dual-sided CCD vision system and a servo correction device, achieving a registration accuracy of ≤0.12 mm laterally and ≤0.15 mm longitudinally. The composite layer uses a fluorinated acrylate system with a refractive index of 1.44-1.46, matching the paper base. When observed under light, the positive and negative patterns are precisely aligned, with clear layers, high anti-counterfeiting recognition, and a production qualification rate of 98%, making it suitable for high-end tobacco packaging.

The present application relates to the technical field of welding, and specifically discloses a SLMed GH3230 lock bottom weld seam optical fiber laser long focal length focal point hole in rotation welding method, which comprises the following steps: pretreating a SLMed GH3230 lock bottom joint to-be-welded part, and clamping and fixing a tool to ensure that the butt joint gap meets the standard; configuring a welding equipment optical assembly, adopting a 330mm focal length focusing field mirror matched with a galvanometer system, and matching a transmission optical fiber and a collimation unit; setting an argon gas protection nozzle with a tail cover and adjusting the spacing to form a welding protection atmosphere; setting welding process parameters, and controlling the laser focal point to rotate at a high speed in a circle in the welding hole through the galvanometer system; welding along the butt joint seam track to ensure that the penetration depth is not less than 4mm, and completing the non-penetration laser tailor welding of the lock bottom joint. The present application effectively suppresses weld cracks, reduces pores, improves surface forming, and is suitable for welding of lock bottom joints of various alloys.

This invention discloses a method and system for macroscopic forming control in high-power single-mode laser welding, belonging to the field of laser welding quality monitoring and control technology. The method first establishes a complete quadratic polynomial mapping model between weld penetration depth and laser power, welding speed, and defocusing amount based on process experiments. Through time-scale analysis, a dimensionless number S is defined to characterize the relative magnitude of the evaporation and heat conduction effects at the top and bottom of the keyhole, establishing a keyhole stability criterion. Based on the threshold range of S and the penetration depth model, a process window for good macroscopic forming is defined. In actual welding, the S value is calculated according to process parameters, and combined with the process window, rapid judgment of weld forming quality is achieved. The dimensionless number S criterion provided by this invention quantitatively reflects keyhole stability from a physical mechanism perspective, avoiding the blindness of traditional empirical methods, and can efficiently achieve process parameter control, improving the forming quality and process development efficiency of thick plate laser welding.

This invention discloses a method for improving the density of flexible copper circuits through laser direct writing, belonging to the field of flexible electronics manufacturing technology. The method includes: preparing a precursor layer on the surface of a cleaned and fixed target substrate using a precursor, wherein the precursor includes a reducing copper ion solution; irradiating the precursor layer with a focused laser to perform laser direct writing, forming a monolayer copper microstructure; repeating the above steps until the copper microstructure is stacked layer by layer to a preset thickness; cleaning the sample surface to remove unreacted residual precursor, obtaining a high-density copper microstructure. This invention, under limited laser energy input, matches the optical penetration depth with the precursor thickness, avoiding thermal damage to the substrate while obtaining a monolayer copper microstructure; employing a layer-by-layer stacking direct writing strategy, the newly added precursor penetrates into the previously formed copper microstructure, forming new nano-copper particles to fill the pores under the action of the laser again, effectively improving the final structure density.

The application provides a kind of standard penetration test measurement method based on machine vision.The measurement method is to install a height reference rod vertically beside the drill rod of standard penetration test, and to set up a high-definition monocular camera at a distance of 2.5-3.5 meters from the test device to record the whole process video of the test;target detection is carried out frame by frame for all videos in the test process to form the original height sequence of the hammer body at different times in the standard penetration test process, and Gaussian smoothing processing is carried out on it;the sliding window difference method is used to calculate the motion trend to judge the state of the hammer body;the starting position coordinates and the ending position coordinates of each hammering are obtained from the original height sequence of the hammer body, the difference between the two is calculated as the pixel displacement corresponding to the current hammering, and the actual penetration depth of each hammering is converted.The application realizes the motion state recognition and the number of blows of standard penetration hammer through machine vision technology, significantly improves the operation efficiency, and can obtain reliable scale factor and strong anti-interference ability.

The application discloses a kind of film pick-up quality online prediction and parameter optimization method of fusion depth camera, comprising: obtain millimeter level residual film scene RGB-D point cloud by the depth camera array installed behind pick-up mechanism, input lightweight residual film semantic segmentation network to extract residual film point cloud subset, calculate residual film area, folding volume and centroid offset geometric features.Cascading this feature with machine operation parameters, input the quality prediction regressor of off-line calibration to obtain the current frame recovery rate.Write the falling gradient of continuous N frame recovery rate into first-in first-out window, if it exceeds threshold, then trigger parameter optimization.Online gradient descent-extreme value search hybrid algorithm is used to iteratively update operating speed, tine penetration depth and conveyor chain tension, and the updated parameters are real-time issued, to realize the online closed-loop optimization of residual film pick-up quality.The application can improve the stability, intelligent level and overall operation quality of residual film pick-up.

The application discloses a garden plant health state monitoring method based on image analysis and belongs to the technical field of image analysis and plant health monitoring, and comprises the following steps: collecting reflection images and polarized light images of the same plant area under multiple wave bands; calculating the penetration depth of each wave band in the plant medium based on a radiation transmission model and a plant optical parameter library; enhancing the reflection images by adopting a multi-scale Retinex algorithm, removing the specular reflection interference by utilizing the polarized light images, and obtaining corrected images; extracting abnormal texture areas of the corrected images, combining the penetration depth information, and constructing a multispectral feature fusion matrix; based on the fusion matrix, shallow normal and deep abnormal areas and areas with abnormal layers are compared and analyzed, internal abnormal classification discrimination rules are executed, the tomographic distribution of the plant internal health state is determined, and a tomographic imaging diagram distinguishing areas by different colors is generated, so that nondestructive, non-contact and accurate detection of the internal hollow rot of the tree trunk is realized, and the detection result is intuitive and visual.

This invention relates to a laser welding method for large effective penetration depth copper plate fillet welds. The method includes: after the corners of the copper plates to be welded are butt-jointed, laser welding is performed along the welding trajectory using a laser welding device under coaxial air blowing protection to form a fillet weld at the corner. The laser welding device uses a multimode infrared laser with a total power >6000W. During welding, the tilt angle between the welding head and the vertical plane is ≥5°, the welding speed is 30-40mm / s, and the defocusing amount is +3mm-+6mm. Using a high-power multimode infrared laser for tilt welding reduces infrared light reflection and avoids damage to the optical configuration. With appropriate welding speed and defocusing amount, there is a large power density and uniform energy distribution, enabling the effective penetration depth to be greater than 1.5mm. It can also take into account the stability of the molten metal pool. The weld appearance has no obvious spatter or pores. It is highly efficient and can significantly reduce equipment costs compared to blue, green, or infrared composite lasers, which is beneficial for mass production.

This invention discloses a multi-wavelength laser control device and method based on time-division multiplexing timing scheduling, relating to the field of home phototherapy device control technology. The device uses a treatment head temperature sensing unit to acquire the real-time temperature of the skin interface. A thermal relaxation boundary calculation unit calculates the thermal relaxation time boundary based on the temperature signal and the penetration depth parameters and energy absorption coefficient parameters of the two wavelength bands, generating shallow thermal load weights and deep dose compensation weights. After correction, an upper limit boundary for the time slot allocation period is obtained. A time slot allocation logic generation unit substitutes the upper limit boundary into a non-equal-width mutually exclusive pulse allocation function to generate a three-state scheduling sequence. This invention transforms the wavelength penetration depth and energy absorption coefficient into weights, driving the non-equal-width mutually exclusive pulse allocation function to generate a three-state scheduling sequence containing independent thermal recovery windows, achieving closed-loop dynamic adjustment and active thermal management of deep and shallow energy allocation, reducing the risk of shallow heat accumulation and local tissue thermal overload.

This invention discloses a rare earth infiltration method for NdFeB magnets based on laser nano-micro etching and plasma synergistic pretreatment, comprising the following steps: S1: NdFeB magnet loading and positioning; S2: Ablation cleaning and activation of the NdFeB magnet surface using argon plasma; S3: Nano-etching patterns on the NdFeB magnet surface using picosecond or femtosecond lasers in a pulsed dot matrix pattern; S4: Weak acid etching of the NdFeB magnet surface to remove the heat-affected layer and open grain boundary diffusion channels; S5: Rare earth infiltration of NdFeB magnets using laser nano-micro etching and plasma synergistic pretreatment. S6: Magnetron sputtering deposition of Tb thin film on the surface of NdFeB magnet; S7: Annealing and diffusion of NdFeB magnet in vacuum or inert atmosphere to form a shell-rich Tb grain boundary structure; S8: Post-processing and quality assessment of NdFeB magnet significantly improves the adhesion and interface stability of magnet surface deposition; penetration depth is increased to more than twice that of traditional planar treatment; Tb content is reduced by 30-50% while maintaining or improving Hcj coercivity; grain boundary penetration uniformity is improved, and thermal stability and demagnetization resistance are enhanced.

There is a need for improved shaping materials for 3D printing having improved printing characteristics, including but not limited to those related to light penetration depth or through-print characteristics. 【Solution】In one aspect, a shaping material intended to be used with a three-dimensional (3D) printing system is described herein. In some embodiments, the shaping material described in the present invention includes an acrylate component, a photoinitiator component, a non-curable absorption component, and water. The photoinitiator component of the shaping material is operable to initiate curing of the acrylate component and / or any other curable material that may optionally be present when the photoinitiator component is exposed to incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength λ. The shaping material has a penetration depth (D p ) and a critical energy (E c ). In some embodiments, D p is greater than 200 μm and less than 300 μm, and E c is 3 - 12 mj / cm 2 . In other embodiments, D p is greater than 10 μm and less than 50 μm, and E c is 5 - 40 mj / cm 2 .