584 results about "Synchronous detection" patented technology

The invention relates to the technical field of power distribution network fault positioning, in particular to a power distribution network fault positioning method based on traveling wave detection, and the method comprises the following steps: S1, distributed detection network construction and signal collection: collecting a three-phase current traveling wave signal in real time; s2, time-frequency joint analysis and feature extraction: extracting time-frequency energy distribution features; s3, intelligent screening of effective fault wave heads: screening out the effective fault wave heads; s4, initial arrival time parameter determination: determining the initial arrival time of each detection point; s5, according to topology self-adaptive error correction, transmission path wave velocity deviation is corrected through line parameter dynamic compensation, and clock errors of the asynchronous detection device are eliminated through adjacent node clock difference estimation; and S6, multi-source data fusion and fault positioning: resolving space coordinates of fault points. According to the invention, the method improves the recognition accuracy of fault features, and solves the problems of poor anti-interference capability and high misjudgment rate of a single feature in a conventional method.

The invention relates to the technical field of stamping part detection, and discloses a stamping part size and defect synchronous detection method and system. The method comprises the steps that the multi-sensor measurement module is used for collecting line laser scanning morphology data, infrared thermal image strain data and structured light projection contour data of a stamping part; multi-sensor data registration is achieved through a feature point matching algorithm, and a three-dimensional space coordinate mapping relation is generated; calculating the thermal expansion compensation amount of the material in combination with a thermal deformation correction model; filtering the structured light projection contour data, and extracting key contour feature points and defect region boundaries; inputting the related data into a multi-source data fusion model to obtain a dimensional deviation and defect fusion detection result; based on this, a measurement path is updated through a dynamic path planning algorithm, and a synchronous detection scheme is output. The device can synchronously detect the size and defect of the stamping part, improves the detection precision and efficiency, achieves the quality grade classification, and is high in adaptability.

The invention discloses a distribution network cable fault early warning method and system based on multi-terminal synchronous traveling wave detection, and relates to the technical field of cable fault detection. The method comprises the following steps: deploying at least three synchronous detection ends at each branch end point of a cable, and synchronously triggering a sampling rate; establishing a master-slave synchronous network, and performing frequency spectrum correction on the acquired data; constructing a real-time correction model based on the data of the distributed temperature sensor; extracting early fault features, and constructing a three-dimensional feature tensor; carrying out preliminary diagnosis on edge nodes and carrying out feature classification by adopting a transfer learning optimization network; and in combination with the cable load rate and the environment temperature and humidity, an early warning threshold self-adaptive model based on fuzzy PID (Proportion Integration Differentiation) is established. Through multi-terminal cooperative perception and intelligent analysis, the scheme converts a fault processing mode from passive first-aid repair to active defense, improves the manual inspection efficiency of the distribution network cable, and finds early fault hidden dangers in advance.

The invention discloses a radioactive substance multi-point synchronous detection and identification method and system, and relates to the technical field of radioactive substance monitoring. Comprising the following steps: step 1, collecting multi-point radiation data in real time, and preprocessing and storing the data; step 2, constructing a spatial adjacency matrix, estimating a local spatial gradient, calculating an anomaly degree value, taking optimization measures, and performing collaborative anomaly evaluation on the monitoring nodes; 3, calculating a total fitting error value, reversely deducing a leakage source position and leakage intensity in real time, and taking corresponding measures in real time; 4, abnormal trend identification is carried out, an early warning judgment value is calculated, and graded early warning and multi-node cross confirmation measures are implemented; and 5, receiving and storing various types of data, carrying out visualized analysis on the data, and supporting event processing and feedback. The problems that due to the fact that some devices are good in shielding and have physical obstruction, trace leakage is difficult to detect by a single-point monitor, and the risk of long-term retention pollution exists are solved.

The present invention belongs to the technical field of LiDARs, and particularly relates to a system and method for synchronous detection of atmospheric data in the same path. The detection system comprises a transmitting unit, a receiving unit and a data processing unit, wherein the transmitting unit comprises a plurality of laser devices, and is used for synchronously transmitting laser having different wavelengths in a common path; the receiving unit comprises a receiving telescope, which is symmetrically provided with a plurality of sub-apertures used for receiving echo signals that are generated after the laser having different wavelengths interacts with the atmosphere; and the data processing unit is used for calculating atmospheric data parameters by means of the echo signals. By means of the present invention, synchronous detection of a plurality of atmospheric data parameters in the same path can be implemented.

The invention provides a large-diameter welded pipe surface defect and straightness detection device which comprises a support, first cameras, second cameras and an image processing system, a through hole penetrating through a welded pipe is formed in the support, a plurality of sets of first cameras are evenly distributed on one side of the support in the circumferential direction, the camera shooting ends of the first cameras face the center of the through hole, and the camera shooting ends of the second cameras face the center of the through hole. At least three sets of second cameras are arranged on the support in the moving direction of the welded pipe at equal intervals, the first cameras and the second cameras are electrically connected with the image processing system, and the image processing system is used for processing data collected by the first cameras and the second cameras, recognizing the surface defects of the welded pipe and calculating the straightness of the welded pipe. The detection device has the advantages that the problem that an existing device cannot detect the surface defects and the straightness of the welded pipe at the same time is solved, synchronous detection of the surface defects and the straightness of the welded pipe can be completed in a short time, and the detection efficiency is greatly improved.

The invention discloses a nondestructive testing device for a steel profile and a testing method of the nondestructive testing device. According to the method disclosed by the invention, the ultrasonic technology is combined with optical imaging, so that synchronous detection of surface and internal defects can be completed at one time. Ultrasonic waves penetrate through the interior of the steel profile, and hidden defects such as cracks and air holes are accurately recognized; the optical camera module captures visible problems such as surface scratches and corrosion in real time. The integrated detection mode avoids the tedious process of step-by-step operation required by a traditional method, for example, magnetic powder detection of surface defects and ultrasonic scanning of an internal structure are not needed, the detection period is greatly shortened, and the method is especially suitable for steel structure buildings, bridge engineering and other scenes with high requirements for detection efficiency and has good application prospects. The full-process automatic design effectively reduces the influence of human intervention, and ensures the scanning continuity of the detection area; the intelligent algorithm automatically analyzes the ultrasonic echo signal and the optical image data, and judges the defect level according to the preset standard, thereby avoiding subjective misjudgment of manual visual inspection.

The invention discloses a cable branch box multi-mode cooperative control system and method, and relates to the technical field of power equipment intelligent control, and the method comprises the following steps: injecting a low-amplitude synchronous detection pulse in an operation environment of a cable branch box, collecting a feedback response signal of the detection pulse, inverting an arrival sequence of an interference signal according to the feedback response signal, and carrying out the inversion of the arrival sequence of the interference signal; and constructing a micro time slot interference portrait, and generating a time sequence baseline for an interference identification reference. According to the method, the time sequence base line is established through micro time slot detection, and accurate identification of microsecond interference signals is realized in combination with phase consistency analysis, multi-channel sampling and a cross-cycle evolution model. The false triggering probability is reduced by adopting a phase-locked suppression and delay cache mechanism, and the safe release of peak energy is realized through a phase turn-back amplitude limiting and energy guiding mode, so that the stability and the anti-interference capability of the cable branch box in a complex electromagnetic environment are remarkably improved.

The invention relates to a frame synchronization detection method, device and equipment and a medium, and the method comprises the steps: carrying out the frequency offset pre-compensation of a received satellite signal; setting N different frequency offset grades, and adopting the N different frequency offset grades to perform secondary frequency offset pre-compensation on the satellite signals subjected to frequency offset pre-compensation to obtain N satellite signals subjected to secondary frequency offset pre-compensation; performing frame synchronization detection on each satellite signal subjected to secondary frequency offset pre-compensation by adopting a frame synchronization detection algorithm to obtain N detection results; and screening out a final frame synchronization detection result by adopting a preset rule based on the N detection results. According to the method, the frame synchronization detection performance can be improved, and the detection performance can meet the system design index requirement.

The invention discloses a high-speed strip steel defect detection method and system based on anomaly enhancement and image reconstruction, the problem that part of defects are difficult to recognize is solved by adopting a pseudo anomaly enhancement method, the defects difficult to detect are divided into a scratch type and a stain type, a local average gray level floating method is designed to generate scratch type pseudo anomalies, and the defect detection accuracy is improved. And a contour random disturbance method is used to generate stain type pseudo anomalies, and local difference features are provided for the model. And a lightweight image reconstruction model of an encoder-decoder structure is designed to achieve high detection speed and meet the requirement of synchronous detection. According to the method, performance testing is carried out on a strip steel surface image data set, advanced performance evaluation is obtained, and the effectiveness of the method is proved.

The invention relates to the technical field of lens testing, and discloses a multifunctional optical lens testing lens device which comprises a connecting frame. A casing; a lens body; the positioning assembly is used for fixing the position when the lens body is detected; the detection assembly is used for carrying out multidirectional detection on the lens body; the detection assembly comprises an air pressure detection part, an impact detection part and a vibration detection part; and a driving assembly. According to the multifunctional optical lens testing lens device, multi-direction detection of the lens can be realized through the arranged detection assembly, and multi-direction synchronous detection in vibration, impact, air tightness, waterproofness and high-temperature environments is realized, so that each detection is in a linked state, the detection effect of the lens in different high-complexity environments is improved, and the detection efficiency is improved. And the whole detection process is carried out in one device, and single position conversion is not needed, so that a high-intensity environment is provided for the test of the lens, and the stability of the lens is finally detected.

The invention discloses a multi-parameter coupling detection method of an integrated optical sensor and related equipment. The detection method comprises the following steps: injecting different trace medicament combinations into a to-be-detected sample in a plurality of micro-fluidic sub-channels according to a preset time sequence; performing phase shift coding acquisition on the differential optical response signal, splitting a broadband light source into a plurality of wavelength subintervals, and generating a coded light signal with a preset phase shift amount; calculating a cross-correlation function between the channels, and performing signal amplification or suppression processing on the channel group with high coupling degree; multi-dimensional feature extraction is carried out, and the differential interference amount, the amplitude ratio and the phase synchronization degree between channels are calculated; baseline drift and noise distribution are monitored in a preset time window, and parameter adjustment is carried out; and performing self-learning evaluation on the detection data, updating identification model parameters, and generating a multi-parameter fingerprint spectrum. According to the technical scheme, the problems of signal aliasing and insufficient sensitivity in multi-parameter detection are effectively solved, and high-precision synchronous detection can be carried out on various target objects.

The invention discloses a wafer front and back surface detection system and method, and the system comprises a first scanning system which comprises a first light source module and a first camera module, and a second scanning system which comprises a second light source module and a second camera module. Light spot positions formed on the front surface and the back surface of the wafer by the first light source module and the second light source module are mutually staggered along projection positions on the front surface or the back surface of the wafer, or the projection directions of illumination light emitted by the first light source module and illumination light emitted by the second light source module are different; the first camera module and the second camera module respectively collect front or back images of the wafer to obtain a scanning result, and the analysis module analyzes the scanning result to obtain a detection result. The illumination light spots on the front and back surfaces of the wafer are staggered or the projection directions of the illumination light are different, so that the problem of mutual interference of light beams generated in the synchronous detection process of the front and back surfaces of the wafer is avoided, and the accuracy of the detection result of the front and back surfaces of the wafer is improved.

The invention discloses a multi-defect synchronous detection device for copper product processing and a use method thereof, and belongs to the technical field of copper product detection.The multi-defect synchronous detection device comprises a mounting base and a defect detection system applied to the detection device, a positioning groove is formed in the upper surface of the mounting base, and a copper pipe is placed in the positioning groove; according to the device, firstly, a pair of detection mechanisms are installed below an I-shaped pipe and an L-shaped pipe correspondingly, so that synchronous detection of the inner wall and the outer wall of the copper pipe is achieved, the problem that the inner wall and the outer wall are detected and separated in a traditional detection method is solved, and the detection efficiency and accuracy are greatly improved; the detection system can emphatically identify and evaluate the risk of the position again, the problem of product quality misjudgment caused by dependence on a single detection standard is prevented, potential safety risks existing in products are eliminated in time, the product quality level is improved, meanwhile, the use safety of the products is enhanced, and the detection system has wide application prospects and market value.

The invention discloses microelectronic magnetic force detection equipment and a method thereof, and belongs to the technical field of microelectronic magnetic force. The microelectronic magnetic force detection equipment comprises an equipment main body, a locking mechanism, a clamping mechanism and a detection mechanism; the lower portion of the equipment body is connected with the locking mechanism, the upper portion of the equipment body is connected with the clamping mechanism, and the detection mechanism is arranged on the right side of the equipment body. By means of the mode, the function of continuous feeding and discharging is achieved through the clamping mechanism and the locking mechanism, detection continuity is achieved, automatic operation is achieved in the whole process, and the operation stability is achieved while the working efficiency is improved; the detection capability is further expanded by adopting an array form of the atomic magnetometers, multi-angle synchronous detection can be realized after a plurality of atomic magnetometers are combined into an array, and meanwhile, the surface of the chip is cooled by blowing air through the cooling pipes at different angles, so that non-uniform temperature of the magnetic core in the detection process is prevented, and the detection precision is improved. And the stability of magnetic force detection is improved.

The invention discloses a video time synchronization processing method and system based on a high-precision network timing protocol. According to the method, time frequency traceability is provided for an internal taming clock module and a clock synchronization module of a processing host through second pulse signals; the internal taming clock module selects to execute a clock taming operation or switch to a self-travel time mode according to whether the external time reference exists or not; according to the time synchronization detection result of the video synchronization processing module, if it is judged that the time synchronization difference between different cameras exceeds a preset range, hardware trigger signals are sent to the cameras through an external trigger generation module, so that camera parameters are adjusted, and key frames are generated; and the video synchronous processing module identifies key frames generated by the multiple cameras by adopting an image definition evaluation method, and completes time axis alignment of the video streams of the multiple cameras based on the key frames. According to the invention, the problem of low synchronization precision or accumulative error and network jitter in the prior art is solved; the time delay after the software is aligned is high, and the camera and the processing host lack feedback linkage.

The invention discloses an audio and video synchronous detection method and device, electronic equipment, a program product and a medium, and relates to the field of artificial intelligence. Human voice audio and human face video in a to-be-detected video file can be segmented into audio clips and video clips according to preset clip duration; and time sequence feature extraction can be performed on each audio clip to obtain the audio feature of each audio clip, and time sequence feature extraction can be performed on each video clip to obtain the video feature of each video clip. Then, the feature similarity between each audio clip and each video clip can be calculated, and when it is determined that the target feature similarity between the target audio clip and the target video clip at the same segmentation position is not larger than the feature similarity between the target audio clip and at least one other video clip, the target audio clip and the at least one other video clip can be segmented. And judging that the audio and video of the to-be-detected video file are asynchronous, thereby improving the accuracy of audio and video synchronous detection by means of time sequence feature extraction, feature similarity calculation and feature similarity comparison.

The invention discloses a signal countering intelligent monitoring system of an unmanned aerial vehicle, which relates to the technical field of signal countering and comprises a multi-source acquisition module, a dynamic verification module, a decision analysis module, an intelligent communication module, an integrated radar unit, a spectrum analysis unit, an infrared sensing unit and a sound wave detection unit. Multi-source data fusion is realized through the data association evaluation value, the signal countering effect of the unmanned aerial vehicle is improved through the threat evaluation value R, the hierarchical threat response and the precise matching countering strategy, and when the radar signal intensity normalization value S1 conflicts with the infrared feature matching degree S3, the verification value is calculated according to the voiceprint matching degree S4 and the spectrum matching degree S2, so that the reliability of the unmanned aerial vehicle is improved. Or a standby unmanned aerial vehicle signal recognition system is started for synchronous detection, multi-source data contradiction is solved, the misjudgment rate is reduced, satellite, 5G and Mesh network dynamic switching is achieved, the communication performance of the system is guaranteed through a priority strategy, and the data transmission delay rate is reduced.

The invention discloses an on-line detection system for glucose content and conductivity, comprising: a two-parameter synchronous detection module integrated in a to-be-detected liquid loop and used for synchronously detecting the glucose content and conductivity at the stages of concentrated solution preparation, inlet filling, cleaning and to-be-detected liquid testing; the real-time detection device comprises a cooperative control module for controlling the signal acquisition time sequence of the glucose content detection and the conductivity detection through time division multiplexing or an independent channel; the compensation calibration module is used for dynamically calibrating sensor parameters based on the concentration data of the real-time standard liquid and compensating a detection result in combination with temperature monitoring data; the data processing module is fused with multi-dimensional data prediction, counteracts cross interference, carries out feedforward compensation on sensitivity attenuation of the sensor in combination with historical data, and outputs a glucose content and conductivity detection result; the multi-dimensional data comprises glucose content, conductivity and temperature. According to the invention, the stability, precision and long-term reliability of online detection are significantly improved.

The invention provides wafer detection equipment and method, and relates to the technical field of semiconductor manufacturing. The equipment comprises a base platform, a wafer carrying table movably arranged on the base platform, a front surface detection device arranged above the wafer carrying table, and a back surface detection device arranged below the wafer carrying table. The back face detection device comprises a supporting part for supporting the wafer, a containing cavity is formed in the supporting part, and the containing cavity is filled with transparent liquid to infiltrate the outer surface of a blue film on the back face of the wafer. Light scattering caused by frosted texture of the blue film is eliminated through infiltration of the transparent liquid, meanwhile, the wafer is supported through the supporting part to avoid the sagging problem, front and back synchronous detection without overturning of the wafer is achieved, and the technical problems of blue film imaging obstacle and automatic detection failure in the prior art are solved.

The invention discloses a multi-gas synchronous detection device and method based on dual-frequency wavelength modulation and demodulation, and relates to the field of gas detection, the device comprises a light source module, a photoacoustic signal detection module and a data processing module; wherein the light source module outputs an excitation light beam and irradiates the excitation light beam into a gas chamber of the photoacoustic signal detection module; the excitation light beam is a light beam modulated by a sawtooth wave signal and two sine waves with different frequencies; the photoacoustic signal detection module receives photoacoustic signals generated after each gas to be detected in the gas chamber interacts with the excitation light beam and converts the photoacoustic signals into piezoelectric signals; and the data processing module performs secondary harmonic demodulation on the piezoelectric signal to obtain demodulated secondary harmonic data, and further inverts the concentration of the gas to be detected. According to the invention, two sine wave signals with different frequencies are superposed on the basis of a sawtooth wave signal, the frequency distribution of a modulation signal is expanded, and the concentration of gas adjacent to various absorption lines can be accurately detected at the same time.

The invention provides a Mach-Zehnder interferometer optical fiber sensor based on an arc-shaped concave cavity single-mode optical fiber. The device is characterized by comprising an incident optical fiber 1, a beam splitter 2, an interference arm 3, a beam combiner 4 and an emergent optical fiber 5 which are connected in sequence. The incident optical fiber 1 is used for transmitting an input optical signal, the beam splitter 2 couples the optical signal in the incident optical fiber 1 into the interference arm 3, the interference arm 3 is used as a transmission waveguide, three arc-shaped concave cavities with different depths and curvature radiuses are arranged in the interference arm 3, and when a solution to be detected is immersed in the concave cavities, the refractive index change modulates an interference spectrum through an optical path difference and a phase difference; according to the design of the three concave cavities, refractive index distribution of three independent positions in the reaction process can be measured at the same time, the beam combiner 4 recombines optical signals in the interference arm 3 and couples the optical signals into the emergent optical fiber 5, and the emergent optical fiber 5 is responsible for outputting the optical signals and transmitting the optical signals to detection equipment for analysis. According to the invention, multi-position synchronous detection is realized through the multi-cavity gradient sensitive characteristic and in combination with the femtosecond laser micromachining technology, the problem of accidental errors of a traditional single-position sensor is solved, and the sensor is suitable for scenes such as microfluidic reaction requiring dynamic monitoring of refractive index change.

The invention discloses a remote sensing landslide and surrounding building detection method and system based on a VITAEv2-S model, and belongs to the field of image processing. The method comprises the steps that a detection model is constructed, a lightweight segmentation framework is adopted and comprises an encoder and a decoder, the encoder adopts a VITAEv2-S backbone network, multi-scale cavity convolution and a self-attention mechanism are combined, and the detection model is constructed; extracting multi-scale features; the decoder simplifies a U-Net structure, removes a pyramid pooling module, adds a space attention module to focus landslide and building areas, and adds a channel attention module to enhance feature channels corresponding to the landslide and the building; the detection model is trained; and synchronously segmenting the landslide and the building by using the trained detection model. According to the method, a lightweight improvement scheme is provided for a segmentation framework, semantic segmentation precision is improved, computing resource consumption is remarkably reduced, small sample training ability is improved, synchronous detection of landslides and buildings is realized through multi-task learning, and the method is suitable for disaster real-time monitoring scenes.

The invention relates to the technical field of signal demodulation, and discloses an OFDM (Orthogonal Frequency Division Multiplexing) signal demodulation method of a signal analyzer. According to the invention, through joint optimization of a synchronous detection and frequency offset compensation mechanism, the symbol positioning precision in a low signal-to-noise ratio environment is improved, and subcarrier interference caused by a cyclic prefix pseudo peak value and frequency offset phase ambiguity is effectively suppressed; a time-frequency two-dimensional adaptive interpolation strategy is adopted to enhance the robustness of channel estimation to non-uniform pilot frequency distribution and a fast time-varying channel, and data subcarrier response distortion is reduced; in combination with minimum mean square error equalization and dynamic noise reduction processing, inter-symbol interference and a noise accumulation effect are greatly weakened, and the bit error rate performance of a high-noise scene is improved; the error control technology is updated through a closed-loop channel, a demodulation error propagation path is blocked, and cooperative improvement of system demodulation stability and precision in a complex multi-path environment is achieved.

The invention relates to a closed-loop power control device based on power synchronous detection and multi-point compensation, and the device comprises a power meter which is used for detecting the transmitting power and the feedback power at the same time; the gain calculation module is used for calculating a transmission link gain compensation value according to the detected transmission power and feedback power; the first transmitting link gain compensation module is arranged at the front end of the pre-distortion processing module in the divergent link and is used for performing gain compensation on the pre-distortion processing module; the second transmitting link gain compensation module is arranged at the front end of a power amplifier in a transmitting link and is used for performing gain compensation on the power amplifier; and the control module is used for adjusting the compensation values of the first transmitting link gain compensation module and the second transmitting link gain compensation module according to the transmitting link gain compensation value. According to the invention, the power of the transmitting link and the power of the feedback link can be synchronously detected, and an enough gain adjustment range can be ensured.

Embodiments of the present disclosure provide a random access method, a device, and a storage medium. The random access method is applied to a terminal device and includes: determining a physical random access channel (PRACH) window or determining a PRACH burst. In the random access method provided in the embodiments of the present disclosure, the terminal device determines the PRACH window or the PRACH burst, to ensure that a time when the terminal device sends a preamble is synchronized with a time when a non-anchor cell is activated. In this way, the preamble sent by the terminal device may be synchronously detected or received after the non-anchor cell is activated. This may reduce activity of the non-anchor cell to periodically detect a PRACH and avoid an excessive random access delay, to achieve network energy saving (NES) and load balancing.

The invention discloses a control method for peak search in signal synchronous detection and a computer device, the method comprises the following steps: processing a received leader sequence sampling point signal to obtain a synchronous detection metric value, further searching and calibrating feature points in a classified manner, and in different parameter updating modes, according to the position relationship between the feature points and a search window, determining the peak value in the synchronous detection. Effective peak points are obtained, peak counting updating is carried out through the effective peak points, and synchronous judgment is carried out. According to the method, peak value searching is carried out on multiple points at a time in different parameter updating modes, effective peak value points are obtained, and the peak value searching efficiency is improved. The method can be realized on the basis of traditional synchronous detection single-point peak value search, can also be used for simultaneously carrying out peak value search on multiple input points, effectively improves the processing rate of a receiving end of a communication system, and can be suitable for more communication system scenes.

The embodiment of the invention provides an LTE230 system downlink synchronization method and device. The method comprises the following steps: acquiring a received signal; performing PSS coarse synchronization detection according to the received signal and a generated local main synchronization signal, and determining a PSS coarse synchronization position and a cell intra-group identifier; performing PSS fine synchronization detection according to the received signal and the PSS coarse synchronization position, and determining a PSS fine synchronization position; and performing SSS synchronization detection according to the received signal and the PSS fine synchronization position, and determining a cell group identifier and a frame initial position. According to the synchronization signal generation method and the detection method provided by the invention, the complexity can be reduced, and the synchronization precision can be improved.

The invention provides a digital receiver circuit and a control method thereof. The digital receiver circuit comprises a frame synchronization detection module, a symbol synchronization detection module and a symbol decoding module, the frame synchronization detection module comprises a first matched filter and a first peak detection module; the first matched filter is used for performing convolution operation on a guide code sequence in the received synchronization signal to obtain a convolution operation result; the first peak value detection module is used for determining the position of a convolution peak value according to the convolution operation result; determining the end position of the guide code sequence according to the position of the convolution peak value; the symbol synchronization detection module is used for detecting positioning information of an end position of each symbol in effective data connected with the guide code sequence; according to the positioning information, determining a pulse sequence corresponding to a judgment moment of symbol decoding of the effective data; and the symbol decoding module is used for performing symbol decoding on the effective data according to the judgment time and the pulse sequence. The technology can improve the accuracy of signal detection and decoding.

The invention discloses a pattern wafer multi-parameter synchronous detection system and method based on double optical combs, and belongs to the field of wafer quality detection. The system comprises a signal light path, a reference light path, a detection light path and a synchronous detection module. After interference, the detection light beam and the reference light beam are decomposed into an H path and a V path through the polarization beam splitter, and are synchronously detected by the first camera and the second camera. The invention also provides a method which comprises the following steps: synchronously acquiring two paths of time domain interference data; fourier transform is carried out on each pixel point to obtain a plurality of spectrum pairs; the processing unit decodes in parallel based on the spectrum pair, and synchronously inverts multi-dimensional physical parameters such as three-dimensional morphology, stress and film parameters of the pattern wafer; and finally, comparing and identifying defects. According to the method, the problems of low detection efficiency and single information dimension in the prior art are solved, and wide-field, high-speed, high-precision and multi-parameter synchronous comprehensive characterization is realized.