88 results about "Synchronous detection" patented technology

The present application relates to water quality detection and analysis technical field, specifically to a kind of water total phosphorus multi-parameter synchronous detection method based on water, comprising: after the original water sample is pretreated, the standard test solution obtained is simultaneously introduced into parallel digestion tank and optical cell, and the digestion and conversion of phosphorus compound and the collection of water sample background spectrum are completed synchronously.Digestion liquid is distributed to multiple independent color developing channels, each channel uses characteristic color developing agent configured for different concentration interval or interference condition, concurrent color developing reaction is carried out under the same environment, and the reaction kinetics time sequence spectrum of each channel is collected.The background spectrum and all kinetic spectrum sequences are input into integrated calibration model for data fusion and cross analysis, and total phosphorus content detection result is directly output.The method realizes wide concentration range, high anti-interference capability of water total phosphorus rapid and accurate detection by parallel acquisition of homologous background information and multi-reaction channel kinetic data.

A kind of heart sound sensing structure and its preparation method, the structure includes double SOI substrate, center mass, elastic support beam, piezoresistive sensing unit and capacitive sensing unit.The front surface of center mass is provided with additional mass layer, and the back surface is kept bottom layer silicon to increase thickness;Elastic support beam connects mass and frame;Piezoresistive sensing unit is composed of four piezoresistors to form wheatstone bridge, and capacitive sensing unit includes movable and fixed comb-tooth capacitive plate crossing each other.When the sound pressure gradient of heart sound signal drives mass to deviate, elastic support beam bends to change piezoresistive value, and at the same time, comb-tooth capacitive plate overlapping area changes to cause capacitive value change, to realize piezoresistive and capacitive dual-mode synchronous detection.Two kinds of detection mechanisms calibrate each other, which significantly improves the sensitivity and anti-interference ability of low-frequency heart sound signal.The preparation method is based on double SOI substrate, integrated by ion implantation, etching, metal deposition and 3D printing process, suitable for miniaturized wearable heart sound monitoring application.

This utility model discloses a synchronous extension detection device, relating to the field of seat belt bracket detection technology. It includes a support frame and a support plate mounted on the upper surface of the support frame. A first cylinder is provided on the upper surface of the support plate, with its output end penetrating the support plate and fixedly connected to the upper surface of a lifting plate. A spring is also fixedly provided on the lower surface of the lifting plate, with the other end of the spring connected to a guide plate. A third limiting groove is provided on one side of the guide plate, and a matching guide plate is slidably mounted on the third limiting groove. This utility model uses a second cylinder to drive the guide plate to move up and down within the second limiting groove. The extension pin, under the action of the guide shaft, extends forward synchronously to perform a push detection on the tightness of the seat belt bracket and the two sides of the reinforcing plate. This achieves synchronous detection of the tightness of the connection between the seat belt bracket and the two reinforcing plates, improving detection efficiency and accuracy, and meeting the needs of large-scale production of automotive parts.

The invention relates to a measurement system (10) of the MEMS and / or NEMs type comprising: a resonant assembly (RE) comprising a plurality of N indexed OMRi resonators i, at least one resonant mechanical element MEij coupled to each OMRi resonator, and at least one waveguide (WG) to which the optical resonators are coupled, an emission device (ED), an injection device (ID), each OMRi resonator of the resonant assembly being further configured to be excited at a mechanical excitation frequency (fex / o(i)) and to modulate the light beam associated with said first excitation frequency (fex / o(i)), a resonant mechanical element (MEij) being configured to be excited at a mechanical excitation frequency (fex / e(i,j)) and to modify an optical transmission or reflection in the vicinity of the optical resonance of said associated resonator, said modification being a function of a physical quantity (u) to be measured,at least one detector (Det) and a demodulation device (DDM) comprising a plurality of synchronous detection demodulation modules (11), referred to as LIA. Figure 11,

This utility model discloses a gauge for detecting the straightness and span of a long U-tube, belonging to the technical field of heat exchanger copper tube processing and mold manufacturing. It includes a base, a span detection component and a straightness detection component fixed on the base. The span detection component includes an outer shell fixed on the base, an inner shell that cooperates with the outer shell, and a U-shaped detection block fixed on the inner shell. The straightness detection component includes a lower support and an upper support, and a floating inner sleeve component located between the upper support and the lower support. The integrated span detection component and straightness detection component can simultaneously detect the center distance of the copper tube and the straightness, achieving synchronous detection of the two parameters. Moreover, by replacing the U-shaped detection block and the floating inner sleeve component with different sizes and specifications, it can be applied to the rapid detection of copper tubes of different diameters and the accuracy verification of the mold. That is, by using a replaceable inner diameter component to adapt to copper tubes of different diameters, the detection efficiency and accuracy are improved.

The application discloses a pump-repump-probe time-resolved spectrum system for measuring luminescence and absorption, comprising a laser beam splitting module, a probe light path construction module, a pump light path regulation module, a repump light path adjustment module, a double-channel signal acquisition module and a light path coupling and converging module. The same femtosecond laser is used to split a light beam, two-stage light splitting is performed to obtain initial light beams of pump, repump and probe light paths, and each light path is subjected to delay adjustment, wavelength conversion, focusing and other treatments, and then is precisely coupled at the same spatial position of a sample. The double-channel signal acquisition module synchronously captures luminescence signals and probe light transmission signals of the sample, and realizes data acquisition in combination with reference light path calibration. The test method acquires multidimensional dynamic information through light path optimization, light beam coupling, signal synchronous acquisition and analysis. The system realizes synchronous detection of luminescence and absorption signals under the same excitation condition, and solves the test error and single mode limitation of the traditional independent system.

The utility model relates to optical module test technical field, concretely for a kind of low-speed TTL optical module error code testing device, including error code testing box, auxiliary detection component and to-be-detected piece;The side box of error code testing box is integrated with multiple groups of detection connecting port, each group of the detection connecting port is adapted to connect detection lead, and the other end of the detection lead is connected with plug-in interface;The auxiliary detection component contains auxiliary plug-in box, by the design of auxiliary detection component, multiple groups of to-be-detected piece are placed in the limiting groove of auxiliary plug-in box in turn, the adjusting plate and guide plate are driven to move using telescopic cylinder, make the plug-in interface on guide plate synchronous with the connecting port of multiple groups of to-be-detected piece butt joint, realize the synchronous detection of multiple groups of low-speed TTL optical module, compared with the error code testing device of traditional only single detection, greatly shorten test time, satisfy the demand of multiple optical modules simultaneous testing in large-scale production, effectively improve production progress.

The utility model relates to rustproof steel elevator door pocket detection technical field, and disclose a kind of size detection calibration tool for stainless steel elevator door pocket production, including drum conveyor, the top of drum conveyor is provided with measuring mechanism, one end of measuring mechanism is provided with dismounting mechanism, measuring mechanism includes measuring frame, the inside slide of measuring frame is connected with sliding block, one end of sliding block is fixedly connected with first air cylinder, the other end is fixedly connected with first measuring plate, the inside fixed connection of measuring frame has return spring, one end of return spring is fixedly connected with second measuring plate, the bottom fixed connection of second measuring plate has mounting seat, this size detection calibration tool for stainless steel elevator door pocket production, three size synchronous detection are realized by measuring mechanism, effectively reduce the tedious operation of multiple adjustment measurement position, reduce the measurement error caused by artificial intervention, reach the effect of improving detection efficiency and detection accuracy.

The present application belongs to the technical field of visual detection equipment, and particularly relates to a transparent bottle visual detection method and an all-purpose machine visual detection equipment; the present application separates and positions the bottle body through a marshalling mechanism, performs a humanized bottle overturning action to reduce impact, stirs the liquid at a low speed, irradiates and collects images through a three-way light source, tracks the bottle body through a synchronous detection module, and combines a classification and rejection mechanism to solve the problem of low detection accuracy caused by bubble interference and disordered liquid movement in the prior art, effectively reduce liquid oscillation and bubble generation in the bottle through the humanized bottle overturning action and low-speed rotation, avoid detection interference, significantly improve the accuracy and stability of special-shaped bottle detection, and reduce the misjudgment rate.

The application discloses a kind of based on bimodal resonance's photoacoustic-scattering aerosol dual-wavelength synchronous detection system and method, belong to photoelectric detection technical field, in the system, dual-wavelength light source modulation module generates two different frequency modulated laser, respectively from two ends into double-difference bulb pipe coupling photoacoustic-scattering combined gas cell;The gas cell includes the two ends of two acoustical tubes arranged in parallel and each is connected with an integrating sphere, form H type coupling structure;Scattering signal collection module, photoacoustic signal acquisition and processing module respectively acquire two-channel scattering photon counting data in two integrating spheres, sound wave signal in two acoustical tubes and two integrating spheres;Digital lock-in signal processing module based on FPGA outputs modulation signal to light source, and receives sound wave signal in two acoustical tubes and two integrating spheres to carry out full-digital demodulation and processing.The application effectively solves the problem of time-space asynchronization and sampling cumulative error caused by time-sharing multiplexing or multiple machine parallel connection.

This invention discloses a synchronous detection method for machine vision devices, relating to the field of synchronous detection technology, comprising the following steps: constructing a scene screen; setting the placement position of the machine vision device based on the scene screen; acquiring a real-time target image based on the scene screen and the machine vision device; acquiring a grayscale segmentation threshold based on the real-time target image; acquiring a real-time target region based on the grayscale segmentation threshold and the real-time target image; constructing a real-time reference value based on the real-time target region; determining whether the machine vision devices are synchronized based on the real-time reference value; if the machine vision devices are not synchronized, acquiring the time deviation between the two machine vision devices based on the real-time reference value; this invention addresses the problem that existing synchronous detection technologies fail to analyze whether synchronization is achieved based on image results, leading to low accuracy of synchronous detection results.

Provided in the embodiments of the present application are a communication method and apparatus, which are used for improving the synchronization detection performance of a low-power synchronization signal (LP-SS). In the present application, the number of 0-valued bits and the number of 1-valued bits in a sequence used for generating an LP-SS are set equal, such that the power of different sequences is identical, thereby enhancing the synchronization detection performance of the LP-SS.

The application relates to a frictional electric self-power supply fault detection platform and method of a screw ball reducer, and belongs to the field of reducer performance testing. The detection system is placed on the ground and is in communication connection with a signal output system, the reducer, the signal output system, a translation system and a rotation system are respectively placed on support tables of a support system, the reducer is connected between the translation system and the rotation system, the rotation of the rotation system drives the rotation of the reducer, transmission is realized through a shaft coupling, and is transmitted to the translation system. Advantages are that: the integrated synchronous detection of the dynamic performance and the fault state of the reducer is realized; the high-fidelity transmission of the rotating end signal is ensured through the conductive slip ring and the double-path signal acquisition; real-time waveform display and synchronous recording of key parameters are supported, the test precision is high, the anti-interference capability is strong, and the screw ball reducer can be widely applied to performance verification and reliability testing of screw ball reducers in the fields of industrial robot joints, balance cars and the like.

The application discloses a coal tar component online spectrum detection early warning method and system, and belongs to the field of coal chemical process detection and safety management and control. The method comprises the following steps: continuously sampling and pre-treating the to-be-detected sample at constant temperature and pressure; splitting to an atomic emission and near-infrared spectrum unit for synchronous detection of inorganic components and organic components; after pre-processing the double-spectrum data, performing data fusion and two-way cross correction on the double-spectrum data through multivariate correction and two-way matrix compensation models to obtain full-component detection results; matching the results with a threshold value and a risk rule library to generate a graded early warning signal, uploading the signal to a distributed control system and issuing a process adjustment instruction to form a closed loop. The application realizes synchronous online detection of organic and inorganic components, eliminates matrix interference through two-way cross correction, constructs a graded early warning and process linkage system, and improves the safety management and control level of coal tar processing.

This invention relates to a method for testing twin defects in pre-oxidized wafers using a particle testing machine, belonging to the field of semiconductor wafer defect detection technology. The method includes the following steps: Step 1: Thermal oxidation preparation; the grown oxide film is obtained through wet oxidation in an oxidation furnace, and the wafer is cleaned using a final cleaning machine. Step 2: Particle testing method optimization and film establishment. Step 3: Result comparison and verification; by establishing an Oxide Film model, the signal processing algorithm of the particle testing machine can distinguish between particle signals and twin signals, thereby achieving synchronous capture. Step 4: By optimizing the particle testing machine method, twin defect detection of the pre-oxidized wafer is successfully completed simultaneously during particle testing. By optimizing the particle testing machine method, synchronous detection of particle testing and twin defects is achieved, thereby improving detection efficiency, shortening the process, and maintaining the integrity of the sample.

The application discloses a multi-channel cable knocking instrument and a target optical cable detection method thereof, and is used for realizing synchronous detection and analysis of vibration signals of multiple optical cables. The device comprises a multi-channel vibration analyzer, a handheld terminal and a vibration hammer. The multi-channel vibration analyzer converts a pulse signal into multiple optical signals through a laser and an optical splitter, and sends the optical signals to each target optical cable. A circulator and a detector are used for receiving back Rayleigh scattering light signals, and a signal processor is used for analyzing and processing the back Rayleigh scattering light signals. The handheld terminal receives analysis results through a communication module and displays the analysis results. The vibration hammer is used for generating a vibration source. The method realizes synchronous monitoring and positioning of multiple optical cables, and improves detection efficiency and accuracy.

This invention belongs to the field of water quality optical detection technology and discloses a multi-parameter synchronous detection method based on open optics and optical path compensation. The invention constructs an open optical detection device, sets a minimum test cycle of 1 second, and completes signal acquisition in stages. The core utilizes a four-stage optical path compensation algorithm—source correction, turbidity separation, path attenuation compensation, and temperature correction—to sequentially complete source attenuation correction, turbidity scattering signal separation, transmittance calculation and temperature correction, and target signal attenuation compensation. Finally, it synchronously outputs parameters such as algae species and concentration, fluorescent dissolved organic matter, turbidity, transmittance, water temperature, and water pressure in the water body. This invention achieves in-situ real-time detection of multiple parameters in the same water body, with high detection accuracy, strong long-term stability, and good real-time performance, making it suitable for various water environment monitoring scenarios such as rivers, lakes, and oceans.

The application relates to the technical field of detection equipment, in particular to a symmetry part edge detection equipment and method based on air pressure detection, which comprises a platform substrate, an air cylinder arranged above the platform substrate, a detected hole penetratingly arranged on a part and a detection air nozzle, the detection air nozzle is controlled to ascend and descend through the air cylinder; the part is positioned and placed on the platform substrate, the detection air nozzle corresponds to the detected hole up and down when the part is installed in a normal direction; the symmetry part edge detection equipment based on air pressure detection can detect the edge reverse problem of the symmetry part which is prone to occur in the assembly process, avoids the misjudgment risk of manual visual inspection, can realize batch synchronous detection, and improves the detection efficiency.

This invention provides a reference-free background calibration method for ultra-high-speed TIADCs based on minimum mean square (RMS) calibration. It employs a decimation-calibration-interpolation calibration mode. The original quantized data is decimated using a specific decimation rate to obtain multiple quantization code sets. A step-by-step grouping calibration algorithm is used based on the number of interleaved channels, selecting the first quantization code set for step-by-step calibration. Each step involves grouping the data and using a dual-channel synchronous detection method based on a binary search to search for the clock jitter value of each channel in the grouped quantized data. Other quantization code sets are then compensated using a first-order Taylor approximation in the digital domain based on the clock jitter value of the first quantization code set. Finally, the compensated multiple quantization code sets are re-interpolated to obtain the calibrated result of the original data. This invention eliminates the need for a reference channel, minimizing the RMS of the detected clock jitter value and thus improving compensation accuracy.

A digital human voice and lip synchronization detection method, system, medium and product, in the method, an image frame group and a corresponding audio segment are extracted from a video; visual features are extracted using a visual coding model, context, content and tone features of the audio are extracted through a self-supervised speech model and a language model respectively; a distance matrix is calculated after fusing the audio features; a mapping relationship between the visual and audio features is established based on the minimum cumulative distance path; finally, the correlation weight is calculated through the cross-modal attention mechanism, and whether it is synchronized is judged by the cosine distance. When the cosine distance is less than the threshold value, it is determined to be in a synchronous state. The present application is used to improve the accuracy of digital human voice and lip synchronization detection in complex contexts.

A component analysis method and system. A sample is excited by a synchrotron radiation beamline to obtain sample charged ions; the sample charged ions are accelerated by an acceleration orbit to obtain sample to-be-tested waves; and the components of the to-be-tested sample are determined by analyzing the sample to-be-tested waves. The synchrotron radiation beamline has the characteristics of high intensity, high collimation, high monochromaticity, wide energy spectrum coverage and high polarization, and the trace and ultratrace components can be accurately detected by exciting the to-be-tested sample by the synchrotron radiation beamline, the detection limit can be reduced to the ppb level or even the ppt level, the high purity requirement of high-end semiconductor materials on materials can be met, and the synchrotron radiation beamline can be used for material component analysis, the sample loss can be avoided, the real component distribution can be restored, the synchronous detection of multi-element complex components can be realized, and the full component detection of matrix elements, doped elements and trace elements in the material can be realized synchronously.

This invention relates to the field of fastener conveying and inspection technology, and in particular to a synchronous inspection and screening device for fastener conveying, comprising a horizontal main frame and an electrically controlled conveyor belt mounted on the horizontal main frame. The synchronous inspection and screening device for fastener conveying utilizes a built-in transverse guide plate installed inside the conveying equipment. Then, it forms a U-shaped loop using electrically controlled lateral guide frames and an electrically controlled outer guide frame that bend upwards at both ends. This allows fasteners to be laterally guided away, optically inspected and identified internally, and then guided back to the conveying equipment, significantly improving inspection efficiency. By employing two sets of inclined, horizontally moving guide conveyors of different heights, multi-faceted inspection of fasteners can be performed, increasing the optical inspection range and improving inspection accuracy. This device can be directly integrated into existing conveying equipment, greatly improving adaptability and facilitating upgrades and modifications.

The application provides a wafer position calibration device of a vertical furnace and a calibration method thereof, which comprises: a wafer boat for carrying wafers; a detection device comprising a first circular slide rail, a plurality of first guide rods, a plurality of first sliding blocks and a plurality of wafer detection units; each first guide rod is slidably assembled on the first circular slide rail in a circumferential direction; each first sliding block is slidably assembled on the corresponding first guide rod in an axial direction; an adjusting device comprising a second circular slide rail, a second guide rod, a second sliding block and a mechanical hand; a control system configured to receive position information collected by each layer wafer detection unit, calculate the offset of each layer wafer relative to the center of the wafer boat, and drive the mechanical hand to rise to the corresponding height of the wafer to be adjusted and adjust the position according to the offset. By introducing the cooperative control mechanism of "multi-point synchronous detection-wafer offset real-time calculation-deviation wafer targeted calibration", the position of the wafer in the wafer boat can be calibrated in situ.

The application discloses a shield tunnel segment apparent defect image intelligent detection method and system, and belongs to the technical field of tunnel engineering detection. The method comprises the following steps: acquiring a tunnel inner wall ring scanning image in an image acquisition step; performing illumination correction and contrast enhancement in an image preprocessing step; synchronously identifying four types of defects, i.e. cracks, damages, misalignments and water seepage, through a deep learning network in a multi-class defect synchronous detection step; extracting a crack skeleton line and measuring the length, width and trend of the crack in a crack geometric parameter measurement step; calculating the misalignment amount based on gray gradient analysis in a misalignment quantitative analysis step; and performing threat degree scoring and generating a detection report in a defect evaluation and report generation step, while feeding back optimized detection parameters. The application realizes synchronous detection of multiple types of defects, the detection accuracy is above 95%, and the crack width detection precision reaches 0.2 mm.

The invention relates to the technical field of optical communication, in particular to a bias voltage automatic control circuit and method and a silicon-based optical modulator. Through cooperative adaptation of the control circuit, the drive circuit, the signal generation circuit and the signal detection circuit, differential sine disturbance signals are accurately coupled to the radio frequency modulation phase shifter of the silicon-based light modulator, and synchronous detection of average light current and the disturbance signals is achieved by means of a built-in light detector. And the control circuit is linked with the driving circuit to accurately adjust the driving current of the thermo-optic phase shifter and efficiently lock a bias working point. The problems that a traditional scheme is low in precision and complex in circuit are solved, the locking speed and stability are improved, meanwhile, hardware design is simplified, the number of components is reduced, the requirement for miniaturization of a high-speed silicon-based optical module is met, working point drifting caused by environment changes is effectively restrained, and the optical signal quality and the long-term working performance of a communication system are guaranteed.

The present application relates to a kind of tunnel lining void automatic detection equipment and method integrated in two lining trolley, belong to tunnel engineering quality detection technical field.The system will elastic wave detection module, high-precision positioning module and wireless communication module be deeply integrated in tunnel secondary lining construction trolley, construct a set of integrated automatic walking, accurate positioning, data acquisition and remote transmission in one's work system, realize the on-line, nondestructive, full coverage detection to tunnel lining internal void disease, effectively solve the problem of traditional elastic wave detection technology fragmentation, low efficiency and theory research and field application disconnection.The present application seamlessly embeds detection link into construction process by integrated design, realizes the mode change from "post-construction sampling inspection" to "synchronous detection in construction", aims at solving the problems of method fragmentation, low automation and insufficient detection efficiency of elastic wave method in tunnel lining quality detection.

The present application provides a kind of field tobacco baking characteristic fast identification method, belong to field tobacco baking characteristic fast identification technical field, the present application eliminates illumination drift by carrying out Retinex-Gamma joint correction to field tobacco image, constructs the improved deep convolution detection network containing adaptive Gamma correction learnable module, convolution block attention module and small target detection output branch, using optimal transmission interpolation oversampling balanced training set each category sample distribution, using the joint loss function of complete intersection ratio loss function and focal loss function is iteratively trained, and the optimal network parameter is obtained by cosine annealing learning rate strategy and early stop mechanism, finally field tobacco image is executed multi-blade synchronous detection and artificial intelligence classification, the detection result is output as baking characteristic bad, medium, good three kinds of discrimination conclusions, solve the technical problems that field tobacco baking characteristic discrimination relies on dark box test and cannot realize multi-blade synchronous rapid detection under complex illumination conditions.