Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

117 results about "Pulse synchronization" patented technology

Steel structure stress monitoring method based on distributed optical fiber sensing

The invention relates to the technical field of structural stress precision measurement, in particular to a distributed optical fiber sensing-based steel structure stress monitoring method, which comprises the following steps of: 1, constructing a sensing optical fiber array in a steel structure node area; 2, injecting optical pulses into the sensing optical fiber array, and synchronously collecting Brillouin frequency shift signals and Raman scattering signals of all points; 3, temperature and mechanical strain are separated based on the reference optical fiber signals, global temperature compensation is adopted for the first optical fiber set, and temperature gradient compensation along the optical fiber path is adopted for the second optical fiber set; 4, decomposing the compensated mechanical strain into multidirectional strain components according to the spatial orientation of the optical fiber, and reconstructing a three-dimensional stress field through strain component fusion; and 5, dynamically judging the damage risk according to the local stress concentration coefficient and the change rate thereof in the stress field. And through the temperature compensation technology, the influence of the environment temperature change on the strain data is eliminated, and the reliability of the monitoring result is improved.
Owner:WEIFANG AOKEDU STEEL STRUCTURE ENGINEERING CO LTD

TOPCon battery piece defect detection device and detection method

The invention relates to the technical field of photovoltaic module detection, in particular to a TOPCon battery piece defect detection device and a TOPCon battery piece defect detection method. The optical imaging module comprises a 25,000,000-pixel camera, a three-color integral light source array and a multispectral optical filter group, and the light source array is composed of red, green and blue LEDs and supports pulse synchronous triggering; the traditional algorithm processing module is integrated with a Halcon image processing library and is configured with a VarThreshold operator dynamic threshold segmentation unit, an adjustable kernel size corrosion filtering unit and a light and shade separation unit, and an Erosion Rectangle1 operator is used for corrosion filtering; the AI defect detection module is internally provided with an improved YOLOv8 neural network model, and the model structure comprises a Backbone network embedded with a CBAM attention mechanism, a BiFPN network bidirectional feature pyramid and a dynamic loss function optimizer; according to the technical scheme, the limitation problems of low positioning precision, poor detection efficiency, single defect identification dimension and the like of an artificial vision or traditional probe contact detection means can be solved.
Owner:SUZHOU WEIHUA INTELLIGENT EQUIP CO LTD

Radio frequency voltage sensor and plasma source system

The invention discloses a radio frequency voltage sensor and a plasma source system. The radio frequency voltage sensor comprises a signal acquisition module and a signal processing circuit. The signal processing circuit comprises a rectangular wave pulse detection module, a signal conversion module, a peak holding module and an operation output module; the input end of the rectangular wave pulse detection module receives a pulse synchronization signal; the signal conversion module is connected with the output end of the signal acquisition module; the first input end of the peak holding module is connected with the output end of the signal conversion module, and the second input end of the peak holding module is connected with the output end of the rectangular wave pulse detection module; and the operation output module is connected with the output end of the peak holding module. According to the radio frequency voltage sensor and the plasma source system provided by the invention, the peak voltage corresponding to the single-stage pulse can be accurately detected, the peak voltage corresponding to the multi-stage pulse can also be stably detected, the output is prevented from jumping to zero during the pulse closing period, and the stability and practicability of measurement are improved.
Owner:TIANJIN JIZHAOYUAN TECH CO LTD

Multi-mode nonlinear optical microscopic imaging device and system

The invention discloses a multi-mode nonlinear optical microscopic imaging device and system, and the device achieves the two-photon and three-photon excitation imaging of a sample through an integrated light source module, a dispersion compensation module, a scanning light path module, a fluorescence obtaining module, a synchronous control module and a signal processing module. Fluorescence intensity imaging and fluorescence lifetime imaging can be supported at the same time; wherein the scanning light path module is driven by the random mask to realize sparse scanning, so that scanning point locations are effectively reduced, and the exciting light dosage is reduced; the synchronous control module performs time window screening and processing on the fluorescence signal based on the pulse synchronous signal and the position code, so that the signal acquisition efficiency is improved; the signal processing module adopts an FPGA (Field Programmable Gate Array) to carry out real-time image reconstruction and life calculation, so that the imaging speed and quality are ensured; and the master control PC can also perform high-fidelity reconstruction on the sparse sampling image through a deep learning model, so that high-speed, low-light-dose and high-resolution nonlinear fluorescence intensity and life imaging is realized.
Owner:SHENZHEN UNIV

CMOS detector damage system based on time domain composite pulse laser

The invention belongs to the technical field of photoelectric countermeasure, and particularly relates to a CMOS detector damage system based on time-domain composite pulse laser, which comprises a time-domain composite pulse laser generation module, a light beam transmission and focusing module, a target damage monitoring module, a parameter optimization control module and a detector to be damaged. The time domain composite pulse laser generating module comprises a short pulse laser, a long pulse laser, a pulse synchronous controller, a power adjusting unit, a power supply module and a cooling device, and the power adjusting unit is electrically connected with the short pulse laser and the long pulse laser; and the power supply module is electrically connected with the long pulse laser, the short pulse laser and the cooling device. According to the method, energy loss generated by plasmas in a traditional laser damage method is avoided, the damage efficiency is remarkably improved, efficient transmission and concentration of energy in the multilayer structure are achieved through the synergistic effect of long pulses and short pulses, all layers of materials synchronously lose efficacy in a short time, and the damage consistency of the whole multilayer structure is ensured.
Owner:CHANGCHUN UNIV OF SCI & TECH

Unmanned aerial vehicle detection and judgment method based on air-ground system and radio detection cooperation

The invention relates to the technical field of unmanned aerial vehicle radio detection, in particular to an unmanned aerial vehicle detection and judgment method based on cooperation of an air-ground system and radio detection, and the method comprises the steps: finding a suspected target through scanning of a multi-frequency-band radar, triggering an infrared thermal imager carried by an aerial unmanned aerial vehicle to approach an ultra-wide-frequency-band spectrum sensor for verification; accurate positioning is realized by combining ground photoelectric equipment multi-view triangulation positioning and a signal arrival time difference algorithm, a command and control center calculates threat levels through a multi-source data fusion engine, and navigation decoy of dynamically adjusting intensity is adopted for targets smaller than or equal to two levels. Hard killing of ground laser locking rotor center and air electromagnetic pulse synchronous coverage is executed on a target of more than or equal to three levels, the equipment state is synchronized in real time through an optical fiber link, high-energy-consumption equipment is intelligently closed after threat is relieved, a platform starting strategy is optimized, a detection closed loop of'three-dimensional perception-graded treatment-intelligent energy saving 'is constructed, and the intelligent energy saving effect is achieved. And an efficient and accurate low-altitude safety protection scheme is provided for a sensitive area.
Owner:TIANMUSHAN LABORATORY

Multi-axis synchronous control system based on VPX bus

The invention discloses a multi-axis synchronous control system based on a VPX bus, and the system comprises a control platform initialization module which is used for generating a system initialization parameter set; the timing pulse synchronization module is used for forming a timing interrupt signal set; the state acquisition and error write-in module is used for acquiring an axial state, calculating an error signal and writing the error signal into the private area and the broadcast area; the distributed deviation coupling module is used for constructing a state synchronization data set; the sliding mode surface construction and state judgment module is used for constructing a non-singular fast terminal sliding mode surface; the sliding mode control output generation module is used for executing a distributed sliding mode control strategy; the optical signal conversion and data stream generation module is used for generating an optical signal control data stream; and the actuating mechanism driving module is used for converting the optical signal control data stream into an analog driving signal. According to the invention, a distributed sliding mode control and VPX high-speed synchronization mechanism is adopted, and multi-axis high-precision cooperative servo control is realized.
Owner:上海泛腾半导体技术有限公司

Water pump flow control method and control system

The invention discloses a water pump flow control method and system, and the method comprises the steps: S1, a control system is initialized, a global impedance set is obtained through the control system, and the global impedance set comprises but is not limited to the impedance coefficients Zi, the initial pressure Qs and the descent slope K of all branches; s2, based on the global impedance set, the pulse switch time sequences of all branches are coordinated through a pulse synchronous constant-current control method, so that the whole pipe network system operates synchronously at constant current; and S3, if the pulse unit at the inlet end of any branch detects that the pressure waveform is continuously abnormal, the fault diagnosis module sends a fault alarm and a diagnosis result to the main controller, the main controller isolates the abnormal branch, and the step S2 is executed again. By means of the control method and system, it can be guaranteed that the variable-frequency water pump is started in a peak shifting mode, huge pressure impact caused by simultaneous starting and stopping of all valves is avoided, the variable-frequency water pump always works near a resonance point, output is constant, flow is stable, the system operates in a resonance state, and irrigation is more stable.
Owner:GUANGDONG LASWIM WATER ENVIRONMENT EQUIP CO LTD

Femtosecond laser single-point trigger control system and method based on subnanosecond synchronization

The invention belongs to the technical field of laser precision machining and control, and particularly relates to a femtosecond laser single-point trigger control system and method based on subnanosecond synchronization, and the method comprises the following steps: S1, building a system synchronization clock locked with a femtosecond laser pulse signal phase; the specific mode of establishing the system synchronous clock is that phase locking is carried out on pulse synchronous signals or frequency division signals output by an internal high-frequency clock source and a femtosecond laser source through a digital phase-locked loop technology, and the low-jitter system synchronous clock which is strictly synchronous with a laser pulse sequence is generated. According to the invention, a system clock locked with a laser pulse phase can be generated through a digital phase-locked loop, and the influence of inherent frequency drift of a laser and circuit delay temperature drift is effectively overcome by combining real-time delay calculation based on a prediction algorithm and a high-resolution DDS delay line technology; the synchronization precision between the triggering moment of the single pulse and the external instruction is stabilized at the subnanosecond level, and the requirement of leading-edge application for the extreme time sequence precision is met.
Owner:SHENZHEN JIZI OPTICAL TECHNOLOGY CO LTD

Relay protection device closed loop logic verification system based on data direct acquisition

The invention discloses a relay protection device closed-loop logic verification system based on data direct collection, and particularly relates to the technical field of relay protection device verification. Action logic messages and multi-mode physical quantity data of a relay protection device are synchronously collected through hardware synchronization pulses; carrying out feature extraction on the multi-modal physical quantity data by adopting a transfer learning strategy, matching the multi-modal physical quantity data with a hidden fault feature library, and identifying an abnormal feature vector; performing space-time alignment on the abnormal feature vector and the action logic message, quantitatively evaluating a risk entropy value and judging a risk level; dynamically generating a test sequence priority based on a relay protection device function unit association topological graph, and optimizing test excitation parameters in real time through a digital twinborn model; fusing a physical failure mechanism and a data driving trend to predict the remaining service life of the key element; early warning and predictive intelligent maintenance of the hidden fault of the relay protection device are realized, and the problems that the internal state of the relay protection device cannot be deeply perceived and the self-adaptive optimization capability is lacked in the existing verification technology are solved.
Owner:国网江西省电力有限公司宜春供电分公司

Bipolar nanosecond pulse synchronous output circuit and ablation equipment

The utility model relates to the technical field of medical equipment, and particularly discloses a bipolar nanosecond pulse synchronous output circuit and ablation equipment, which comprise a positive pulse output circuit and a negative pulse output circuit, the positive pulse output circuit comprises a positive pulse charging unit, a positive pulse output control unit, a positive pulse transmission unit and a positive pulse output electrode wire which are electrically connected in sequence; the negative pulse output circuit comprises a negative pulse charging unit, a negative pulse output control unit, a negative pulse transmission unit and a negative pulse output electrode wire which are electrically connected in sequence; the positive pulse transmission unit at least comprises a forward multiplication transmission unit which is used for performing forward voltage multiplication or forward current multiplication on the forward output pulse signal; the negative pulse transmission unit at least comprises a negative multiplication transmission unit which is used for carrying out negative voltage multiplication or negative current multiplication on the negative output pulse signal. The bipolar nanosecond pulse synchronous output circuit provided by the utility model can improve instant pulse energy of nanosecond pulse tumor ablation equipment.
Owner:YUSHOU MEDICAL TECH (WUXI) CO LTD +1

PCIe-based radio astronomy band-pass signal power spectrum estimation operation card

The utility model discloses a PCIe-based radio astronomy band-pass signal power spectrum estimation operation card, which is characterized by comprising a PPS (pulse per second) module used for receiving an input pulse per second synchronizing signal and locking the pulse per second synchronizing signal and a reference clock signal provided by a CLK clock module in a phase-locked loop mode, a clock synchronization signal of the second pulse reference is generated, and synchronous control is carried out on the DDC band-pass signal down-conversion module; the DDC band-pass signal down-conversion module is used for sequentially processing the sampling data output by the ADC sampling module according to the clock synchronization signal of the second pulse reference and then outputting the sampling data to the PFB channelization and power spectrum estimation operation module; and the PFB channelization and power spectrum estimation operation module is used for performing PFB channelization and power spectrum estimation operation on the input data to obtain a power spectrum estimation result, and transmitting the power spectrum estimation result to the PCIe interface module or the network port module for outputting. According to the invention, the flexibility of band-pass data processing is improved.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI

Interference suppression method, system and device based on frequency point quality cognition and medium

The invention discloses an interference suppression method, system and device based on frequency point quality cognition and a medium, and relates to the field of frequency hopping communication. A transmitting end adopts a frame structure of'synchronous head sequence + information sequence + synchronous tail sequence ', and forms a frequency hopping pulse signal for radiation after processes of coding, framing and frequency hopping modulation; a receiving end processes a received frequency hopping pulse signal after signal detection and timing synchronization, calculates a noise power value of each frequency hopping pulse after frequency hopping pulse synchronization head and tail sequences are correlated with a local sequence, calculates a noise weight value of each pulse, multiplies a weight factor with a pulse signal after channel equalization, and obtains a frequency hopping pulse signal. By reducing the signal observed quantity weight of the interfered frequency point, the influence of the confidence coefficient reduction caused by the interference signal on the channel decoding of the whole communication system is suppressed, so that the reliable transmission under the condition of low signal-to-noise ratio and strong interference is realized.
Owner:10TH RES INST OF CETC

Three-in-one coupling reinforced rare earth oxide preparation method and three-in-one coupling reinforced rare earth oxide preparation device

The invention relates to the technical field of preparation of rare earth functional materials, and particularly discloses a preparation method and device of a trinity coupling reinforced rare earth oxide. The preparation device comprises an ultrasonic-microwave composite resonant cavity, a micro-channel reaction unit, an ultrasonic unit, a microwave heating unit, a pulse synchronous triggering module and a multi-parameter linkage closed-loop control module, and in-situ synchronous coupling of a micro-channel, ultrasonic and microwave in the cavity can be achieved. The preparation method is implemented based on the device, sequentially comprises five steps of raw material preparation, parameter presetting, coupling reaction, closed-loop regulation and control and product collection, and can realize time-space synchronous propulsion of precursor nucleation, agglomeration inhibition and in-situ crystallization. According to the device and the preparation method, the mass transfer efficiency in the rare earth oxide preparation process can be effectively improved, product particle aggregation is inhibited, the stability and the production efficiency of continuous production are improved, and the large-scale preparation requirements of high-end rare earth oxides are met.
Owner:KUNMING UNIV OF SCI & TECH

Pulse synchronization method, device and equipment based on microwave detection system and medium

The embodiment of the invention discloses a pulse synchronization method and device based on a microwave detection system, equipment and a medium. The method comprises the following steps: receiving an emission signal of an external radar, and preprocessing the emission signal to obtain amplitude data and phase data; performing pulse measurement on the amplitude data to determine a pulse width, and performing frequency calculation on the phase data to determine a pulse frequency; judging whether the pulse width and the pulse frequency both trigger pulse synchronization processing or not according to a preset pulse parameter range; and if the pulse width, the pulse frequency and the pulse period are triggered, a pulse period is obtained, the pulse width, the pulse frequency and the pulse period are judged through a state machine, and pulse data synchronized with the external radar are determined. By implementing the method provided by the embodiment of the invention, the problem that the microwave detection data of the pulse radar signal cannot be synchronously acquired in the prior art can be solved.
Owner:XIAN HENGFU DEFENSE TECH CO LTD

A synchronized multi-channel multi-polarity sharp pulse generating device for tissue ablation

The application provides a synchronous multi-channel multi-polarity steep pulse generating device for tissue ablation, which comprises an energy storage device, a switch, a transmission line group and a load. The main feature is that the transmission line group is composed of multiple parallel or series transmission lines, the input end of the transmission line group is connected with the energy storage device in series through the switch, and the inner conductors at the output end of the transmission line group form different polarities of ground potential. The transmission lines can independently drive the load and output different polarities of steep pulses on different loads; two transmission lines with opposite polarities of inner conductor potential can cooperatively drive the load in series and output synchronous bipolar steep pulses on different loads. The application creatively provides a synchronous multi-channel multi-polarity steep pulse generating device for tissue ablation, which can be widely applied to the treatment of various tumor and lesion tissues in human body. Compared with the prior art, in the specific implementation, the synchronous multi-channel multi-polarity steep pulse output can realize the ablation of larger tumor tissues or irregularly shaped tissues at one time, and at the same time, it can actively shield the adjacent important tissues to prevent them from being damaged by the electric field.
Owner:HANGZHOU XISAI ELECTRONIC TECH CO LTD

Ultra-short pulse synchronization testing device and method based on optical Kerr effect

A kind of ultra-short pulse synchronization testing device and method based on optical Kerr effect. After the high-power density ultra-short pulse of multiple beams to be synchronized passes through optical Kerr medium, induced birefringence effect occurs, which instantaneously changes the polarization characteristics of the reference light beam, and the synchronization between multiple beams of ultra-short pulses is measured by the amplitude or phase change of the reference signal pulse. This method can realize the synchronization measurement of ultra-short pulses with large angle at the target point, and has the advantages of high measurement accuracy, good repeatability and high stability.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Signal processing method and system of rotary laser scanning measurement system

The invention discloses a signal processing and data extraction method and system for a rotary laser scanning measurement system, and the method comprises the steps: collecting an original electric signal outputted by a photoelectric sensor through a collector, and obtaining an original voltage-time sequence containing a scanning pulse, a synchronization pulse, and random noise; discrete wavelet decomposition is carried out on the collected original electric signals, pulse positions are positioned, and soft threshold processing and inverse wavelet transformation reconstruction mode processing are carried out on wavelet coefficients of all layers in sequence to obtain signal fragments containing pulse signals; performing nonlinear least square fitting by adopting a scanning pulse mathematical model and a synchronous pulse mathematical model to obtain a pulse time sequence of each transmitting station, classifying the pulse time sequences, and distributing each pulse time to the corresponding transmitting station to obtain a pulse time sequence of each transmitting station; and according to the rotation angle of the photoelectric sensor relative to each transmitting station and the accurate coordinate of the calibration point, solving the pose parameter of the transmitting station under the reference coordinate system or solving the three-dimensional space coordinate of the measurement point.
Owner:TIANJIN UNIV

Direct current B code time synchronization and self-timekeeping method based on multi-core heterogeneous chip

The invention discloses a direct current B code time synchronization and self-timekeeping method based on a multi-core heterogeneous chip, and provides a scheme aiming at the problems that the prior art has defects in the aspects of hardware resource utilization, timestamp precision, self-timekeeping capability under abnormal working conditions and the like and is difficult to meet the requirement of a high-precision synchronous scene. A multi-core heterogeneous chip is adopted to replace a single-chip microcomputer or an FPGA to receive, decode and detect a DC B code, nanosecond pulse per second synchronization, nanosecond timestamp calculation and a self-timekeeping function when a DC B code signal is lost are realized based on PWM, and time synchronization among multiple cores is realized through an inter-core communication technology. And predicting a direct current B code period value by using the time sequence prediction model deployed in the non-real-time kernel. The method has the advantages that the technical vacancy of a multi-core heterogeneous chip in direct-current B code time synchronization and self-timekeeping is filled, the out-of-step risk of equipment is reduced, the defect that a traditional direct-current B code time synchronization function can only be accurate to a whole-second timestamp is overcome, and the self-timekeeping performance of the equipment without a standard clock source is remarkably improved.
Owner:SOUTH CHINA UNIV OF TECH

Direct current magnetic bias monitoring device based on Beidou second pulse synchronization

The invention relates to a direct-current magnetic bias monitoring device based on Beidou second pulse synchronization. The direct-current magnetic bias monitoring device comprises a Beidou time service unit, a current monitoring unit and a control execution unit, the Beidou time service unit receives a satellite signal and processes the satellite signal to generate an ADC sampling trigger signal; the current monitoring unit monitors and collects a current signal, conditions the current signal, and starts conversion at the rising edge of an ADC sampling trigger signal to realize synchronous sampling; and the control execution unit processes the current data acquired by the current monitoring unit in real time and performs calculation, outputs a dual-mode decision control signal according to a calculation result, and executes corresponding operation according to the dual-mode decision control signal. According to the invention, sampling is triggered through direct connection of Beidou second pulse hardware, synchronization errors of software time service in a traditional scheme can be thoroughly eliminated, and strict time alignment of measurement points of the whole network is ensured; the action delay is greatly shortened; invalid switching times can be obviously reduced, and the service life of the device is prolonged.
Owner:YANGJIANG NUCLEAR POWER

Water pump flow control method and control system

A water pump flow control method and control system, the method comprising S1: control system initialization, obtaining a global impedance set through the control system, the global impedance set comprising but not limited to impedance coefficients Z of all branches i , initial pressure Q s , and falling slope K; S2: based on the global impedance set, through the pulse synchronous constant current control method, coordinating the pulse switch timing of all branches, making the whole pipe network system run synchronously in constant current; S3: if the pulse unit at the inlet end of any branch detects that the pressure waveform is continuously abnormal, the fault diagnosis module will send a fault alarm and diagnosis result to the main controller, the main controller isolates the abnormal branch, and re-executes S2. Through the control method and system, the variable frequency water pump can be started at off-peak, avoiding the huge pressure impact caused by the simultaneous start and stop of all valves. Secondly, the variable frequency water pump always works near the resonance point, the output constant flow is stable, the system runs in the "resonance" state, and the irrigation is more stable.
Owner:GUANGDONG LASWIM WATER ENVIRONMENT EQUIP CO LTD

Repair method of pulse synchronization signal

The invention belongs to the technical field of data processing, and particularly relates to a method for repairing a pulse synchronizing signal. Comprising the following steps: S1, acquiring a pulse synchronization signal sequence, and preprocessing the pulse synchronization signal sequence to obtain a synchronization point time curve of the pulse synchronization signal sequence; s2, performing primary difference on the synchronization point time curve to obtain a primary difference curve; s3, acquiring a trained repair network based on a BP neural network, and repairing the first-level difference curve by using the repair network to obtain a repaired first-level difference curve; s4, performing backstepping repair on the repaired primary difference curve to obtain a repaired synchronization point time curve; and S5, carrying out backstepping repair on the repaired synchronization point time curve to obtain a repaired pulse synchronization signal sequence. According to the method, the second-level pulse synchronization signal is repaired based on the BP neural network, and the method has positive significance in utilization of electromagnetic detection data.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

An underwater emergency rescue support system

This invention discloses an underwater emergency rescue support system, integrating underwater location measurement equipment, a distress call wristband and its synchronization base, multi-channel synchronization equipment, and a surface monitoring center to jointly construct a highly efficient life safety protection network. The core of the system lies in utilizing GPS second-pulse synchronization technology and underwater acoustic communication to achieve precise monitoring of the location and physiological state of underwater personnel. When an anomaly is detected or a distress signal is received, the system can respond rapidly, calculating the location of the person in distress through the underwater location measurement equipment and transmitting the information to the surface monitoring center in real time, activating the emergency rescue procedure. The entire system employs advanced signal processing technology and a waterproof design, ensuring stability and reliability in extreme environments, thereby greatly improving the speed and efficiency of underwater rescue operations.
Owner:KUNMING SHIP EQUIPMENT RESEARCH & TESTING CENTER (CHINA SHIPBUILDING CORP 750 TEST SITE)

A steel structure stress monitoring method based on distributed optical fiber sensing

The present application relates to the technical field of structural stress precision measurement, and particularly relates to a steel structure stress monitoring method based on distributed optical fiber sensing, comprising the following steps: step 1: constructing a sensing optical fiber array in a steel structure node area; step 2: injecting an optical pulse into the sensing optical fiber array, and synchronously collecting Brillouin frequency shift signals and Raman scattering signals of each point; step 3: separating temperature and mechanical strain based on a reference optical fiber signal: globally compensating for temperature for a first optical fiber group, and compensating for a temperature gradient along an optical fiber path for a second optical fiber group; step 4: decomposing the compensated mechanical strain into multi-directional strain components according to the spatial orientation of the optical fiber, and reconstructing a three-dimensional stress field through strain component fusion; and step 5: dynamically determining damage risk according to a local stress concentration coefficient in the stress field and a change rate thereof. Through the temperature compensation technology, the influence of environmental temperature change on strain data is eliminated, and the reliability of the monitoring result is improved.
Owner:WEIFANG AOKEDU STEEL STRUCTURE ENGINEERING CO LTD

A high-precision pulse synchronization method supporting cascaded delay compensation

The application discloses a high-precision pulse synchronization method supporting cascade delay compensation, and communication network comprises FC-AE switch 1, FC-AE switch 2,..., FC-AE switch N, one or more FC-AE communication nodes are respectively connected to each switch, cascade communication is carried out between the switches through optical fiber cables, a source pulse can be input from any node connected to the switch, the FC-AE node samples the source pulse signal, the rising edge and the falling edge of the signal are respectively composed into two kinds of pulse synchronization frames, and the pulse synchronization frames are sent to the connected FC-AE switch, the FC-AE switch generates a time stamp according to local crystal oscillator timing after being powered on, and simultaneously carries out master switch election and link delay measurement through bidirectional frame interaction at a fixed time, a master switch is elected according to comparison of switch equipment ID values, and the pulse signal is delayed for a corresponding delay time according to the delay value, so that high-precision pulse signal synchronization is completed.
Owner:NO 719 RES INST CHINA SHIPBUILDING IND

A high-precision geographic data system device and a multi-source data fusion processing method thereof

PendingCN122281883AEmergency rescueEngineering
This invention discloses a high-precision geographic data system device and its multi-source data fusion processing method, belonging to the field of geographic information acquisition technology. The data collector adopts a modular design, including a multi-frequency GNSS positioning module, a multi-sensor collaborative system, a data processing and fusion module, a power supply and communication module, and a rugged structure. The GNSS module, combined with an IMU unit, achieves centimeter-level RTK positioning and maintains continuous positioning through inertial navigation and visual SLAM even in signal-blocked environments. Environmental sensors provide weather correction to improve elevation accuracy; the image unit synchronizes with the GNSS second pulse to achieve image marking. The outer shell employs layered electromagnetic shielding and IP67 protection design, and the antenna bracket allows for stepless adjustment of the elevation angle to reduce multipath errors. The system supports 5G and LoRa adaptive communication, enabling real-time data upload and edge fusion processing. This invention has the advantages of high positioning accuracy, strong environmental adaptability, and high data acquisition efficiency, and is suitable for scenarios such as surveying, emergency rescue, and geographic monitoring.
Owner:HENAN UNIVERSITY

Method, device and equipment for collecting billion-pixel multi-scene dynamic image and storage medium

The invention discloses a hundred-million-pixel multi-scene dynamic image acquisition method and device, equipment and a storage medium, and the method comprises the steps: a dynamic polarization modulation module generates phase retardation according to the intensity of a modulation electric field, and adjusts the polarization state of an incident light path to suppress the multi-path interference; the pulse synchronization controller generates a trigger period according to the time change and the space gradient of the scene light intensity, and controls exposure synchronization; and by combining the two parameters, the multi-lens optical array is accurately regulated and controlled to acquire images, and finally a hundred-million-pixel-level high-definition image is generated. According to the method, through real-time polarization adjustment and intelligent exposure control, low-distortion and real-time high-definition imaging in multiple scenes is realized, and quality and speed requirements in a dynamic environment are effectively balanced.
Owner:WUHAN ZHUOHE TECH CO LTD

Ground-fault circuit interrupter

To provide a ground-fault circuit interrupter capable of reducing board space while requiring no light light-emitting element of the optical isolation means.SOLUTION: A ground-fault circuit interrupter 100 includes: a single-phase full-wave rectification circuit 10 connected to an AC line; a diode 12b in which the anode is connected to the positive output of the single-phase full-wave rectification circuit 10; a capacitor 12d connected to the cathode of the diode 12b; a pulse generation circuit 13b that generates a pulse synchronized with the voltage on the anode side of diode 12b; and an outgoing circuit 13c that generates a test current that is synchronized with the output pulse of the pulse generation circuit 13b and is used to test the soundness of the earth leakage detection circuit 7.SELECTED DRAWING: Figure 1
Owner:MITSUBISHI ELECTRIC CORP

Network adaptive pulse synchronization control method and system based on fusion event triggering

The invention relates to the technical field of industrial adaptive control, in particular to a network adaptive pulse synchronization control method and system fused with event triggering, and the method comprises the steps: controlling a plurality of controlled units to execute a carrying task of a target load; identifying the controlled unit to obtain state feedback data; detecting the state of the target load in real time to obtain disturbance feedback data; performing performance index analysis on the disturbance feedback data, and judging whether a preset event triggering condition is met or not; when the event triggering condition is met, self-adaptive pulse control is started; the self-adaptive pulse control comprises the following steps: comparing and analyzing the state feedback data and a preset benchmark reference model, and determining control deviation data; based on the control deviation data, the disturbance feedback data and the state feedback data, self-adaptive parameter optimization is carried out, and control pulse parameters including pulse amplitude, pulse width, pulse shape and cooperative application time are generated; according to the invention, based on the control pulse parameters, synchronous control of a plurality of controlled units is realized.
Owner:ANHUI UNIV OF SCI & TECH