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

176 results about "Pulse time" patented technology

Battery fault diagnosis method and device

The invention discloses a battery fault diagnosis method and device, and belongs to the technical field of battery management. The method comprises the following steps: synchronously acquiring multi-dimensional signals in a battery operation process through a multi-modal sensor array; performing encoding processing on the multi-dimensional signal through a pulse encoder to obtain a standardized pulse time sequence; based on a federated transfer learning framework, training the quantum pulse neural network in combination with a physical constraint loss function to obtain a trained battery fault diagnosis model; inputting the standardized pulse time sequence into the battery fault diagnosis model, and calculating a battery fault category and a thermal runaway probability through quantum inference; and triggering a corresponding security policy according to the thermal runaway probability and a preset threshold. By adopting the technical means of multi-mode signal fusion, quantum calculation acceleration and distributed learning, accurate and rapid diagnosis of battery faults is realized, and the method has the advantages of high precision, low delay and low power consumption.
Owner:SHANDONG JIAOTONG UNIV

Narrow pulse suppression method and device for dynamically adjusting dead time, medium and controller

The invention discloses a narrow pulse suppression method and device for dynamic adjustment of dead time, a medium and a controller, and the method comprises the steps: presetting the dead time of M periods in the future according to the real-time state of a motor and the dead time and current change rate of the first N periods, and outputting a working condition label at the same time, N and M being positive integers; determining target dead zone time Td according to the working condition label and the dead zone time of the M periods in the future; determining a dead zone time ratio Dd according to the target dead zone time Td, constructing an interval section of a PWM signal according to the dead zone time ratio Dd and a narrow pulse time ratio Dp, and constructing an upper bridge arm duty ratio function Dt and a lower bridge arm duty ratio function Db corresponding to each interval section according to the dead zone time ratio Dd and a duty ratio instruction Dm of the PWM signal; according to the interval section where the duty ratio instruction Dm of the PWM signal is located, a duty ratio function of the corresponding interval section is called, and a target PWM signal is output.
Owner:CHINA FAW CO LTD

Standardized integrated access method and system for operation energy efficiency data of marine equipment

The invention relates to a standardized integrated access method and system for operation energy efficiency data of marine equipment, and the method comprises the steps: constructing an energy efficiency data standardization system which comprises equipment types and core energy efficiency data, and generating a unified data identifier of the operation energy efficiency of the marine equipment through a five-level coding rule; first and second core energy efficiency data measurement values of marine equipment with a standard interface and without a standard interface are collected in a wired and wireless mode respectively, and after protocol conversion and GPS second pulse time synchronization, outrange cleaning and null interpolation preprocessing are carried out; mapping the multi-source data into a marine equipment operation energy efficiency unified data identifier through a mapping rule; the current working condition is judged based on the ship operation state information, the time window width and the polynomial order are dynamically adjusted, high-order polynomial fitting processing is conducted on the data subjected to unified identification, and high-quality standardized energy efficiency data are output and transmitted to the ship energy efficiency management platform; and adaptive quality control and standardized integrated access of the multi-source heterogeneous energy efficiency data are realized.
Owner:SHANGHAI SHIP & SHIPPING RES INST CO LTD

Quantum phase-locked detection method based on entanglement enhancement

The invention discloses a quantum phase-locked detection method based on entanglement enhancement, and the method comprises the steps: encoding quantum bits in a ground state and an excited state, and preparing the quantum bits into an initialized quantum state; loading a periodic multi-pulse sequence to act on the quantum bits; and loading a carrier pulse resonating with the ground state and the excited state, detecting the final quantum state of the quantum bit, and comparing curves of each component of the measurement density matrix and the theoretical density matrix changing along with the pulse time interval of the periodic multi-pulse sequence to obtain the half cycle and the amplitude of the sine wave to be measured. According to the method, measurement noise under the condition that the rotation angle and the detuning error exist can be effectively restrained, high measurement precision is kept under the condition that the rotation angle and the detuning error exist, and the robustness enables the method to be more reliable in practical application.
Owner:CHANGSHA QUANTUM R&D CENTER CO LTD

Weather radar distance resolution calibration method and system

The invention relates to the technical field of radars, in particular to a weather radar distance resolution calibration method and system. The method comprises the following steps: collecting oversampling original baseband I / Q data of a point target in a plurality of continuous pulse periods; determining a pulse signal-to-noise ratio, and screening out effective pulses according to a threshold value; carrying out sub-sampling stage time alignment on the effective pulses based on cross-correlation analysis, and carrying out incoherent averaging on power module values of all the aligned pulses to generate an average pulse power envelope; converting the average pulse power envelope to a logarithm domain, and selecting discrete data points in a main lobe region; according to the discrete data points, a nonlinear least square method is adopted to carry out iterative fitting on the generalized Gaussian mathematical model, and a continuous analytic function describing the pulse envelope is obtained; according to the continuous analytic function, determining a pulse time width when the power is reduced to a peak value of-6dB; and determining the real distance resolution according to the pulse time width. The measurement robustness is improved, and sub-meter calibration precision is achieved.
Owner:长沙气象雷达标校中心

Internet of Things water meter operation mode monitoring method

The invention relates to the technical field of electric digital data processing, and discloses an Internet of Things water meter operation mode monitoring method, which comprises the following steps: acquiring an original pulse sequence acquired by a sensor and extracting a pulse time interval sequence; mapping based on the pulse time interval sequence and the system structure characteristic parameters to obtain an equivalent response numerical sequence; constructing a feature vector unit according to the evolution slope between the adjacent numerical points; extracting slope symmetry features of the feature vector units and matching the slope symmetry features with a physical causal criterion so as to separate continuous feature signals and asymmetric noise signals; according to the method, fluid kinetic energy time domain evolution characteristics are represented by using a nonlinear mapping mechanism, accurate decoupling of a real water load and a pipe network disturbance pseudo signal is realized through physical causal verification, the difficult problem of micro flow identification under a complex working condition is effectively solved, and the monitoring robustness of a system is enhanced.
Owner:TIANJIN JINCHAOLIDA TECH CO LTD

Water meter bearing wear state monitoring method and system based on flow velocity working condition

A water meter bearing wear state monitoring method and system based on a flow rate working condition relates to the field of electric digital data processing, and the method comprises the following steps: monitoring the generation frequency of a metering pulse on a target water meter, and determining whether the current metering working condition of the target water meter is a high flow rate working condition or a low flow rate working condition based on the generation frequency; counting a first pulse time interval sequence under the low flow speed working condition, and calculating a dispersion characteristic value of the first pulse time interval sequence as a first state characteristic value; counting a second pulse time interval sequence under the high flow rate working condition, and calculating a dispersion characteristic value of the second pulse time interval sequence as a second state characteristic value; based on the first state characteristic value and the second state characteristic value, calculating a working condition response index representing the wear degradation effect of the water meter bearing on the target water meter; when the working condition response index is larger than a preset abrasion judgment threshold value, abrasion early warning information corresponding to the target water meter is generated. By implementing the application, the water meter maintenance cost can be reduced.
Owner:NANJING ZIFENG WATER EQUIPMENT CO LTD

Large-dispersion compact chirped pulse time domain compression method

The invention relates to the technical field of digital-to-analog conversion, in particular to a large-dispersion compact chirped pulse time domain compression method, which comprises the following steps of: projecting a broadened chirped pulse to a first grating in an inclined incidence mode, and moving adjacent back and forth diffraction spots point by point in a direction parallel to a grating scribed line; the first grating and the second grating are oppositely arranged in parallel to form a double-grating group; controlling the chirped pulse to perform multiple back-and-forth diffraction between the first grating and the second grating to obtain a preset large dispersion amount; an angular dispersion steering module is arranged on a back-and-forth diffraction light path of the chirped pulse, and vertical angular dispersion introduced due to oblique incidence is turned into horizontal angular dispersion. An angular dispersion compensation module is arranged on a light path before the chirped pulse is output, and the angular dispersion accumulated by multiple back-and-forth diffraction is offset and compensated. According to the method, on one hand, the dispersion amount several times that of a traditional pulse time domain compressor can be obtained, on the other hand, the compact design of the structure of the compressor can be achieved, and the method has important engineering application value.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS

Method for testing ballistic transport parameters of pulse-excited transistor at ultralow temperature

The invention discloses a method for testing trajectory transport parameters of a pulse-excited transistor at an ultralow temperature, and belongs to the field of semiconductor device characterization. According to the method, the self-heating effect intensity of a device is actively controlled by adjusting the pulse time at the environment temperature lower than 10K, and the source-drain saturation current of the transistor in different self-heating states is measured; the true temperature of the channel is inverted by using source-drain saturation current in different self-heating states; and calculating the back scattering probability and the ballistic transport efficiency by researching the dependency relationship between the changes of the threshold voltage and the source-drain saturation current and the channel temperature. According to the method, parameter extraction errors caused by inconsistency of the environment temperature and the channel temperature in a traditional method are solved, the intrinsic ballistic transport efficiency parameters of the device can be accurately obtained, and the method is suitable for high-performance planar transistors with silicon, germanium and III-V group compounds as carrier channels, fin type three-dimensional grids and transistors with ring gate-nanowire structures.
Owner:ZHEJIANG UNIV

Method for correcting a time parameter that characterizes the reception time of an echo light pulse received during a LiDAR measurement

A procedure for correcting a time variable (x) is used. spm ) described, which characterizes a reception time of an echo light pulse received during a LiDAR measurement in a temporal reference frame (40). The received echo light pulse originates from a scanning light pulse transmitted by a transmitter of the LiDAR system and reflected at at least one target. A measurement center point time parameter (x spm The temporal center point of the received echo light pulse is determined. A total measurement intensity quantity (A) is determined, which characterizes the total intensity of the received echo light pulse. A measurement pulse width quantity (w) is determined, which characterizes the temporal duration of the echo light pulse reception. An expected total intensity quantity (A) is determined. e ) is specified, which characterizes the total intensity of an ideal echo light pulse. An expected pulse width quantity (w) e) is specified, which characterizes the time length of the ideal echo light pulse. A center-of-mass correction parameter (Δ) sp ) is calculated using the total measured intensity (A), the measured pulse width (w), and the expected total intensity (A e ) and the expected pulse width size (w e ) determined. A corrected center of gravity time parameter (x spk ) is derived from the measurement center time parameter (x spm ) and the center of gravity correction quantity (Δ sp ) determined.
Owner:VALEO SCHALTER & SENSOREN GMBH

Time service synchronization method, computer readable storage medium and electronic equipment

The invention discloses a time service synchronization method, a computer readable storage medium and electronic equipment, and the method comprises the steps: starting a high-frequency SPXO clock source in each preset period based on the timing of a low-frequency SPXO clock source, and enabling the high-frequency SPXO clock source to be aligned with a low-frequency clock moment after buffering; calculating the planned output time of the pulse time service signal by combining the high-frequency clock receiving window, the synchronous packet sending duration, the preset ToF correction window timing value and the latest ToF value; the synchronization packet sent by the host is received before the plan time, correction output time is determined according to the receiving moment, the ToF correction window timing value and the ToF value, and the host sends a pulse to the slave after sending the synchronization packet and passing through the ToF correction window; calculating correction and plan time deviation; performing clock taming on a low-frequency SPXO clock source and a high-frequency SPXO clock source through a multi-cycle deviation value to realize time service synchronization of the slave and the host; and then the high-frequency SPXO clock source is closed.
Owner:HANGZHOU HAILIAN IOT TECH CO LTD

Reconfigurable processor fusing neuromorphic and general computing and execution method

The application discloses a reconfigurable processor and an execution method fusing neuromorphic and general computing, and comprises a total control module and an on-chip network module, wherein the on-chip network module comprises a control module, a pulse storage module, a weight storage module, a pulse time module, a LIF neuron module and a classification comparison module. The execution method comprises the following steps: acquiring an input data set; selecting a working mode of the on-chip network module according to the input data set; and performing data recognition processing on the input data set according to the working mode, and outputting a data recognition output result. The application realizes the working of a central processing unit (CPU) and a spiking neural network (SNN) in a single core, thereby improving the utilization rate of a heterogeneous core and reducing the delay of core-to-accelerator communication. The application can be widely applied to the technical field of neural network accelerator as a reconfigurable processor and an execution method fusing neuromorphic and general computing.
Owner:SUN YAT SEN UNIV

Laser device, exposure apparatus, and electronic device manufacturing method

PendingUS20250364775A1Laser detailsLaser lightActuator
A laser device includes a laser oscillator configured to generate pulse laser light, an actuator configured to adjust a laser light parameter of the pulse laser light, and a laser control processor configured to correct an operation parameter value of the actuator so that a difference between a measurement value and a target value of the laser light parameter becomes small based on a change pattern of a pulse time interval of the pulse laser light continuously changing within a burst of burst oscillation in accordance with a command of an exposure apparatus, and control the actuator.
Owner:GIGAPHOTON INC

Methods for tuning the interaction strength between at least two qubits in a quantum computer and quantum computers

This document describes in detail a method for tuning the interaction strength (J) between at least two qubits (qb1, qb2) of a quantum computer (10), the method comprising the steps of: - applying a first periodic pulse sequence (1) to the first qubit (qb1), - applying a second periodic pulse sequence (2) to the second qubit (qb2), wherein, - the period (T) of the first periodic pulse sequence (1) is equal to the period (T) of the second periodic pulse sequence (2), - delaying the pulses (21) of the second periodic pulse sequence (2) relative to the pulses (11) of the first periodic pulse sequence (1), and - tuning the interaction strength (J) by controlling the time delay (Δt). Furthermore, the quantum computer (10) is described in detail herein.
Owner:ELEQTRON GMBH

Original data feature analysis system in water meter detection

The invention relates to the technical field of industrial data analysis, and discloses an original data feature analysis system in water meter detection, comprising: a pulse data aggregation unit for acquiring an original pulse time sequence; the time sequence difference processing unit is used for receiving the original pulse time sequence and executing first-order difference operation to generate a first-order time sequence difference value sequence; the feature decoupling shunting unit is used for executing logic locking by using a monitoring carrier environment baseline scalar, and dividing a first-order time sequence difference value sequence into a steady state processing channel and a transient analysis channel; the intrinsic mode mapping unit is used for pre-storing intrinsic mode feature vectors; the transient distortion judgment unit is used for extracting the frequency domain feature vector, executing orthogonal projection mapping with the intrinsic mode feature vector and outputting an effective transient distortion tensor, the problem of feature information entropy collapse of the high-frequency pulse sequential sequence in the dimensionality reduction aggregation process is solved, and a semantic gap between an information processing domain and a physical design domain is eliminated.
Owner:LINYI METROLOGICAL VERIFICATION INST

Devices and methods to reduce optical damage in multiphoton microscopy with a scan synchronized laser pulse repetition rate

PCT designated stageWO2026111906A1MicroscopesFluorescence/phosphorescenceVideo rateOptical parametric amplifier
A laser system for multiphoton microscopy comprises a seeder oscillator, fast modulator, amplifier, second modulator, and optical parametric amplifier configured to produce pulses with variable pulse spacing temporally synchronized to a scanner having sinusoidal motion. The variable pulse spacing ensures each pixel receives substantially the same number of laser pulses, eliminating uneven energy distribution of fixed repetition rate systems. The scanner operates at 4-12 kHz frequencies while the seeder oscillator produces femtosecond pulses at 10-100 MHz with 10-100 ns pulse spacing. The optical parametric amplifier outputs wavelengths from 600-1900 nm, with 1300-1700 nm optimized for three-photon microscopy. Methods include synchronizing pulse timing to scanner motion and varying interpulse intervals across scan lines. For 8 kHz scanners with 512 pixels per line, the system achieves 32% energy reduction compared to constant pulse spacing while maintaining 100-150 mW average power on biological samples, preventing thermal damage and enabling video rate imaging.
Owner:NEWPORT CORP

X-ray diode signal reconstruction method

The invention relates to an X-ray diode signal reconstruction method. The method comprises the following steps: determining an electronic pulse time broadening multiplying power function; determining an MCP gain function; acquiring an electronic pulse signal output by the X-ray diode system; performing primary processing on the electronic pulse signal based on the electronic pulse time broadening multiplying power function to obtain a primary processing pulse signal; performing secondary processing on the primary processing pulse signal based on an electronic pulse time broadening multiplying power function to obtain a secondary processing pulse signal; and processing the secondary processing pulse signal according to the MCP gain function to obtain a reconstructed signal. According to the invention, the influence of inconsistent electronic pulse time broadening multiplying power at each slope position of the cathode pulse and inconsistent MCP gain on the measurement precision of the X-ray diode system can be reduced, the accurate reconstruction of the input signal of the X-ray diode system is realized, and the measurement precision of the X-ray diode system is effectively improved.
Owner:SHENZHEN UNIV

METHOD, DEVICE AND LIGHT MICROSCOPE FOR TIME-RESOLVED SINGLE PHOTON MEASUREMENT

The invention relates to a method for time-resolved single-photon measurement, wherein light pulses (L) are generated by a light source (3), wherein photons (P) emitted from a sample (2) on the basis of the light pulses (L) are detected by a detector (4) and registered by an evaluation device (5) coupled to the detector (4), wherein the evaluation device (5) determines detection times (t P ) of the photons (P) are determined, wherein the evaluation device (5) periodically determines pulse times (t) by evaluating a signal from the light source (3) or a sensor (11). L ) of a portion of the light pulses (L) are determined, whereby the pulse times (t L ) are determined at a lower rate than a repetition rate of the light pulses (L), based on the determined pulse times (t L ) Pulse times (t L ') further light pulses (L) are estimated, and where the pulse times (t L , t L') as reference times for the recording times (t P ) of the photons (P) as well as a device (1) for single photon measurement, a light microscope (10) with the device (1) and a computer program.
Owner:ABBERIOR INSTR GMBH

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

Time sequence synchronous trigger control method and system of LTD module multi-path pulse switch

PendingCN121012329APower conversion systemsMultiway switchingPulse front
The invention relates to the technical field of pulse power, in particular to a time sequence synchronous trigger control method for a multi-path pulse switch of an LTD module, which comprises the following steps: S01, measuring the inherent delay time of each discharge branch in the LTD module from trigger signal input to gas switch conduction; and S02, inputting the measured inherent delay time value of each branch into a pulse time sequence controller as a compensation parameter, and setting the delay time of each output channel of the pulse time sequence controller. Through system calibration and programmable delay compensation of the pulse time sequence controller, in combination with high-precision time sequence control of the FPGA, the multi-way switch conduction time deviation can be controlled at the nanosecond level, the energy synthesis efficiency is greatly improved, inductance isolation transmission is achieved through magnetic ring coupling, traditional resistance isolation is replaced, pulse leading edge distortion is avoided, and the energy synthesis efficiency is improved. And meanwhile, high-voltage isolation safety is guaranteed, and trigger signal transmission quality is stable.
Owner:ANTON FUSION (TAICANG) TECHNOLOGY CO LTD

Method and device for testing anti-interference sensitivity of electromagnetic relay

The present application belongs to the technical field of electromagnetic relay detection, and discloses a method and device for testing the anti-interference sensitivity of an electromagnetic relay, which comprises inputting a pulse voltage to the relay coil, monitoring and recording the pulse time value at the instant when the normally closed contact of the relay is separated, and the device comprises a coil power supply, a pulse circuit and a time base timer, the coil power supply comprises a voltage adjustment circuit, the pulse circuit is electrically connected with the time base timer and used for generating a voltage pulse and applying the voltage pulse to the input end of the relay coil, and the time base timer comprises a single-chip microcomputer and a high-frequency clock circuit electrically connected with the single-chip microcomputer and used for generating a voltage pulse to drive the relay coil, when the electromagnetic relay is attracted, the single-chip microcomputer monitors the pulse time value at the instant when the normally closed contact JC is separated. The present application can obtain the voltage value and the duration of the electromagnetic relay without malfunction after the relay is connected with an interference signal, and can provide quantitative parameter guarantee for producing high-quality electromagnetic relay products.
Owner:G & A TECH

Steel belt hole pitch detection method and system based on data processing

The invention belongs to the technical field of hole pitch detection, and particularly relates to a steel belt hole pitch detection method and system based on data processing, and the method comprises the steps: constructing a dynamic prediction window covering a to-be-detected hole site according to the historical position data of a previous hole site in combination with a standard hole pitch parameter; constructing a microscopic slip correction coefficient based on the second-order difference characteristic of the pulse time sequence, and correcting the reference steel strip stroke equivalent by using the microscopic slip correction coefficient to generate a dynamic effective pulse equivalent; interpolation is carried out according to the trigger timestamp and the dynamic effective pulse equivalent, and the absolute position of the hole site is obtained; and calculating an actual hole pitch according to the absolute positions of the two adjacent hole sites, and judging a detection result based on a tolerance standard. According to the invention, the robustness and the measurement precision of hole pitch detection of the steel belt under unstable working conditions of speed change, vibration, slipping and the like are improved.
Owner:SUZHOU EFFICIENT PROFILE INTELLIGENT MANUFACTURING CO LTD

A real gas flow calibration control system and a real gas flow high-low temperature calibration system

The application discloses a real gas flow calibration control system, which is characterized by comprising a host module, a memory, an input / output module, a power module and a communication module; a parameter acquisition module comprising a real gas parameter collector, a pulse isolation amplifier and a pulse / time measurement module; the real gas parameter collector is used for collecting the temperature, pressure and instantaneous flow of real gas in a real gas circulation loop, and the output side is signal-connected with the input / output module; the input side of the pulse isolation amplifier is signal-connected with a standard meter and a meter to be detected, and the output side is signal-connected with the input side of the pulse / time measurement module; the output side of the pulse / time measurement module is signal-connected with the input / output module; and the electric control actuating mechanism comprises a relay, an electric control valve, a flow driving control module and a temperature control module, which are signal-connected with corresponding interfaces of the input / output module. The application further discloses a real gas flow high / low temperature calibration system.
Owner:QIANWEI KROMSCHRODER METERS CHONGQING

Extreme ultraviolet light generation apparatus and electronic device manufacturing method

An extreme ultraviolet light generation apparatus includes a first light source outputting first excitation light, a laser oscillator including an active medium and performing laser oscillation by irradiating the active medium with the first excitation light to output the laser light, a measurement instrument measuring a pulse energy and a pulse time width of the laser light, a temperature regulator that adjusts a temperature of a cooling medium that cools the first light source, and a processor. The processor controls the temperature regulator to adjust the temperature of the cooling medium so that the pulse energy measured by the measurement instrument falls within a target range of the pulse energy, and adjust a current value of a current supplied to the first light source so that the pulse time width measured by the measurement instrument falls within a target range of the pulse time width.
Owner:GIGAPHOTON INC

Wafer surface state monitoring system in integrated circuit processing

The invention relates to the technical field of integrated circuit manufacturing power supply control, and discloses a wafer surface state monitoring system in integrated circuit processing, which comprises a radio frequency electrical parameter acquisition module, a pulse time sequence synchronous control module, a load transient impedance analysis module and a power supply power closed-loop regulation module, the system synchronously controls and locks a circuit free oscillation attenuation window after radio frequency energy is cut off through a pulse time sequence, analyzes a pulse relaxation time constant representing a power supply loop terminal load capacitance characteristic, and generates a power supply adjusting instruction according to the constant. Matching network impedance noise interference during steady-state high-power output of the radio-frequency power supply is effectively avoided, and the monitoring signal-to-noise ratio of wafer surface load characteristics and the power supply closed-loop regulation and control precision are improved.
Owner:SHAANXI SHENGLANLI TRADING CO LTD

Portable pulse X-ray dose rate instrument and detection method

The invention relates to the technical field of nuclear radiation detection, in particular to a portable pulse X-ray dose rate meter and a detection method. The probe module is used for simultaneously acquiring dose information and time information of pulse X-rays; the circuit processing module is connected with the probe module and used for collecting and processing probe signals; and the host module is in communication connection with the circuit processing module and is used for setting parameters, receiving data, analyzing dosage and outputting a detection result dosage value. The invention designs a portable pulse X-ray dose rate instrument, which can measure a pulse X-ray dose rate value with short pulse time and high instantaneous dose rate in a radiation field, meet the calibration requirement of a nuclear critical accident alarm system, ensure the safety of facilities and personnel and promote the research and development of working measuring instruments.
Owner:CHINA INST FOR RADIATION PROTECTION

A quantum lock-in detection method based on entanglement enhancement

The application discloses a quantum phase-locked detection method based on entanglement enhancement, encodes quantum bits in a ground state and an excited state, and prepares the quantum bits as initial quantum states; a periodic multi-pulse sequence is loaded on the quantum bits; a carrier wave pulse resonating with the ground state and the excited state is loaded; a final quantum state of the quantum bits is detected; curves of each component of a measured density matrix and a theoretical density matrix changing with a pulse time interval of the periodic multi-pulse sequence are compared; and a half period and an amplitude of a to-be-measured sinusoidal wave are obtained. The application can effectively suppress measurement noise under the condition of existing rotation angles and detuning errors, and can maintain high measurement precision under the condition of existing rotation angles and detuning errors. The robustness makes the application more reliable in practical application.
Owner:CHANGSHA QUANTUM R&D CENTER CO LTD

An underwater laser pulse time-domain broadening measurement system and method

The application relates to an underwater laser pulse time domain expansion measurement system and method, wherein the measurement system comprises a receiving lens for directly aiming at a pulse laser to be measured and receiving a laser beam output by the pulse laser to be measured; a laser processing unit connected with the receiving lens in an optical path to perform collimation, attenuation and light filtering processing on the laser beam; a high-speed photoelectric detector connected with the laser processing unit in an optical path, used for collecting the processed laser beam and converting the laser pulse electrical signal W1; a data acquisition board electrically connected with the high-speed photoelectric detector, used for collecting the laser pulse electrical signal W1 and sending the laser pulse electrical signal W1 to an analysis processing unit; and the analysis processing unit receives the laser pulse electrical signal W1, calculates the pulse width of the laser pulse electrical signal W1, and calculates the time domain expansion of the laser beam according to a pulse expansion calculation method. The application realizes direct measurement of the time domain expansion of an underwater laser pulse, and improves the measurement accuracy.
Owner:QINGDAO NAT LAB FOR MARINE SCI & TECH DEV CENT

Carving processing method and carving processing system based on vector pulse laser

The invention discloses a carving machining method and system based on vector pulse laser, and belongs to the technical field of laser carving, the carving machining method based on the vector pulse laser comprises the steps that linear polarization femtosecond pulse laser is split into femtosecond pre-pulse laser and picosecond main pulse laser; adjusting the pulse time delay between the femtosecond pre-pulse laser and the picosecond main pulse laser; combining the femtosecond pre-pulse laser and the picosecond main pulse laser after delay regulation and control; the femtosecond pre-pulse laser is converted into an angularly polarized femtosecond pre-pulse light beam, the picosecond main pulse laser is converted into a radially polarized picosecond main pulse light beam, and a double-pulse light beam combination of the angularly polarized femtosecond pre-pulse light beam and the radially polarized picosecond main pulse light beam is formed; and the to-be-machined workpiece is ablated and engraved through the double-pulse light beam combination. And by means of the synergistic effect of double pulses and precise time delay, the width and fusion damage of a heat affected zone are remarkably reduced, and high-precision and low-damage carving machining is achieved.
Owner:TIANJIN UNIV

Laser devices generating time structured laser pulses for selective targeting of tissues and uses thereof

In some embodiments, the instant invention includes a laser device that includes: a laser generating module that produces a plurality of laser pulses having a time-stricture pulse format that includes at least: a plurality of micropulses, a macropulse time envelope, where the plurality of micropulses are within the macropulse time envelope; where the time-stricture pulse format is configured so that the laser device is capable of treating human tissue by selectively targeting or affecting at least one first tissue or at least one first disease organisms while not substantially affecting at least one first surrounding or adjacent tissue.
Owner:LIGHT AGE