35 results about "Multi detector" patented technology

The invention relates to the field of photoelectric detection and the technical field of simulation testing, and provides a laser short pulse echo simulation method, system and device for detection tracking. Comprising the following steps: acquiring spatial azimuth coordinates of a plurality of detectors and spatial azimuth coordinates of a laser galvanometer; according to the spatial azimuth coordinates of the detector and the spatial azimuth coordinates of the laser galvanometer, the spatial azimuth coordinates of the detector are converted into a local coordinate system with the laser galvanometer as the center, and the coordinates of the detector are obtained; calculating the azimuth deflection angle of the laser galvanometer according to the coordinates of the detector; galvanometer driving current parameters are calculated according to the azimuth deflection angle of the laser galvanometer; a step-by-step sequential circuit is adopted, a galvanometer driving current parameter is taken as a reference, and laser galvanometers are driven to deflect in sequence, so that laser pulses are captured by a plurality of detectors. According to the invention, through space coordinate dynamic solution and galvanometer accurate control, time division multiplexing of a single laser source to multiple detectors can be realized, and the resource utilization rate is obviously improved.

The invention relates to the field of post-accident gamma dose rate measurement, and provides a post-accident gamma dose rate dynamic measurement method and system based on multi-detector fusion, and the method comprises the steps: obtaining original signal data and environment parameter data; processing the original signal data, the environmental parameter data, the accumulated radiation dose and the displacement damage energy by adopting a deep learning network to obtain corrected signal data; processing the correction signal data and the environmental parameter data through a time sequence prediction network to obtain a dynamic weight distribution result of each detector; processing the correction signal data and the dynamic weight distribution result based on a self-calibration confidence evaluation network to obtain a confidence evaluation result; and processing the correction signal data, the dynamic weight distribution result and the confidence evaluation result through a weighted fusion algorithm to obtain a dynamic measurement result of the gamma dose rate after the accident. According to the invention, high-precision dynamic measurement, real-time damage compensation and nuclear safety level reliability evaluation of the gamma dose rate after an accident are realized.

The invention discloses an OCT-based light splitting frequency doubling method and a measuring system, and relates to the technical field of optical coherence tomography, and the method comprises the following steps: a light beam emitted by a light source is divided into a first light path and a second light path through an optical fiber coupler, the first light path is transmitted to a collimating lens group through a scanning detection part optical fiber interface, and is transmitted to a second light path through a two-dimensional scanning part; scanning an object to be measured through a focusing lens; a second light path enters the reference arm part, sequentially passes through the polarization regulator and the reference arm collimating mirror group and then is reflected by the reference arm reflecting mirror group; the first light path and the second light path interfere with each other in the optical fiber coupler, and interference light enters the light splitting path detection component after being generated. Interference light is dynamically distributed to multiple detector channels through the light splitting element, efficient multiplexing of a light path is achieved, and different sampling rate and resolution requirements are flexibly met under the control of the main control card through three modes of light splitting, optical switch switching and scanning light splitting.

In certain embodiments, an ophthalmic system for assessing a tear film of an eye comprises measuring devices and a computer. The measuring devices detect light reflected from the eye, where an ocular surface of the eye comprises the tear film, and generate data from the reflected light that describes the eye. The computer aligns the data corresponding to the same location for a plurality of locations, assesses the data at the locations to detect one or more abnormalities of the tear film, and determines a tear film description from the assessment of the data at the locations.

The invention discloses a response non-consistency correction method for a multi-lens multi-detector spliced imaging system, and the method comprises the steps: constructing an initial compensation model of response differences between lenses according to optical design parameters and a ray tracing simulation result; carrying out on-satellite two-point calibration on each lens, and establishing a pixel-level initial linear response relationship; in an in-orbit imaging process, extracting each pixel coordinate in an image overlapping region between adjacent lenses and a corresponding gray scale response difference; performing on-orbit optimization fitting by taking the pixel coordinate as an independent variable and the gray scale response difference as a dependent variable to generate a dynamic compensation item for correcting on-orbit response drift; the adjacent lenses are divided into a reference lens and a target lens, and the dynamic compensation item is applied to the response of the whole image after the target lens is spliced, so that the response consistency correction of the target lens relative to the reference lens is realized. According to the invention, the gray continuity and the system-level radiation consistency of the image splicing area can be obviously improved.

The utility model relates to the technical field of nondestructive detection equipment, in particular to a multi-detector mounting rack. Comprising a base and a power mechanism, a supporting column is rotationally arranged on the base, the power mechanism drives the supporting column to rotate on the base, a supporting plate is fixed to the supporting column, detectors are arranged on the two sides of the supporting plate, and the positions of the detectors relative to the supporting plate can be adjusted up and down. The multiple detectors can be conveniently and rapidly switched, the detection device can conveniently cope with various different use scenes such as detection objects of different sizes and different materials, and therefore the detection efficiency is effectively improved.

The invention provides a multi-detector PGNAA element interested interval analysis method, and relates to the technical field of gamma-ray spectrum analysis, and the method comprises the following steps: irradiating a sample by using a neutron source, and obtaining gamma-ray spectrum and neutron flux by using multiple detectors; analyzing the reference characteristic elements of the characteristic peaks, and determining the uniform or non-uniform state of the sample according to the counting standard deviation of the characteristic peaks; and subdividing types in a non-uniform state, dividing interested intervals, adjusting the position of a detector, correcting an energy spectrum, calculating a weighted count, and finally calculating an element detection lower limit. By means of multi-detector state judgment, interval division, energy spectrum correction and the like, accurate analysis of the element interested interval of the non-uniform sample is realized, the detection accuracy is improved, and the element detection lower limit is reduced.

The invention relates to the technical field of detectors, and discloses a muon momentum reconstruction method based on particle tracks, which comprises the following steps of: 1, researching and developing an efficient energy detector, and processing position information of muons by adopting Kalman filtering and a REST framework in a gas time projection chamber so as to improve the energy measurement accuracy; 2, introducing a dynamic energy measurement algorithm, developing a self-adaptive algorithm, adjusting energy measurement parameters according to real-time feedback, optimizing muon energy estimation by using Kalman filtering, and reducing background noise influence at the same time; 3, realizing multi-detector array integration, designing a multi-detector array with reasonable layout, ensuring synchronous data acquisition, and enhancing the reliability of a measurement result by using cross validation; 4, data analysis is conducted through the machine learning technology, and a machine learning model is constructed and trained. According to the method, the energy of incident muons is estimated through Kalman filtering, the energy of the muons is screened when the muon scattering imaging technology is applied, and the imaging precision is improved.

The invention provides a multi-detector radioactive source positioning method and system based on a particle filter algorithm, and the method comprises the following steps: defining a to-be-monitored physical space as a search region, and building a radiation measurement model; randomly generating a particle set in the search area, wherein each particle comprises assumed radioactive source position coordinates and estimated activity parameters; a mobile platform carrying a plurality of radiation detectors is controlled to move in the area, the total count value of actual measurement of each detector is obtained, and the weight of each particle in the particle set is calculated by using the radiation measurement model and the actual measurement values; acquiring an environment background count value, calculating a ratio of an actual measurement value to a background value, and only when the ratio exceeds a preset signal-to-noise ratio threshold value, performing resampling on the particle set; judging whether the particle set meets a positioning ending condition or not, and if yes, determining a radioactive source positioning result by using the particle parameter with the highest weight and outputting the radioactive source positioning result; and if not, taking the weight gathering center as the next target position, and controlling the mobile platform to move towards the next target position.

This invention relates to a dual-embedded composite detection system, belonging to the field of electron microscopy technology. It effectively combines electron detection, EDS detection, and fluorescence detection, achieving simultaneous detection of the same location on the sample by multiple detectors, and efficiently collecting signals to obtain high-quality image information. The system includes: an electron source, an electron accelerating electrode, an objective lens, an EDS detector, a direct electron detector, a sample, a sample stage, and a control unit. Both the EDS detector and the direct electron detector are obliquely inserted inside the objective lens, with their probes close to the objective lens's detection port. The sample stage, the EDS detector, the direct electron detector, the electron source, and the objective lens are all connected to the control unit. The objective lens has a daguerreotype on its internal pole piece, and reflective cones are located at the bottom ends of both the inner and outer annular walls of the objective lens's detection port.

A multi-detector-based infrared detection system and method for multi-component insulating gas leakage belongs to the technical field of insulating gas leakage detection. It solves the problems of large size, high cost, low cost-effectiveness of existing devices and how to improve the infrared imaging detection effect. The present invention adopts a low-cost multivariate filter + infrared focal plane detector combination design for spectrometry and data processing to achieve simultaneous imaging detection of multi-component insulating gas, reduce equipment costs, and realize portable detection. The grayscale value obtained by the pixel point is matched with the current Gaussian mixture model, the weight parameter is updated, and the mean and variance of the model corresponding to the pixel point are updated. All models are re-sorted in order, and the model that meets the weight threshold is selected as the background. The current pixel point value is matched with the background model to determine whether it is the background or foreground. The gas diffusion display is enhanced by subtracting the complex dynamic background, improving the detection accuracy and automatically identifying the gas diffusion form.

The invention discloses a multi-detector compatible high-integration SNSPD automatic control system, which is characterized in that an ultra-low-temperature part SNSPD receives an optical signal and outputs an electric signal pulse to a pulse preprocessing circuit, a low-temperature part is provided with a low-temperature amplifier, and the input end of the low-temperature amplifier is connected with the pulse preprocessing circuit; the room temperature part is provided with an SNSPD signal reading and processing module based on a single-chip microcomputer, the SNSPD signal reading and processing module amplifies signals transmitted in a low-temperature area, the signals pass through a comparator and then are connected to a counter, the single-chip microcomputer synchronously transmits data of the counter to an upper computer and a lower computer, meanwhile, the single-chip microcomputer controls a DAC to output SNSPD bias voltage, terminal voltage signals are read through an ADC, current flowing through the SNSPD is obtained through calculation, and the current is transmitted to the lower computer. The optimal working point of the SNSPD is dynamically and automatically maintained by detecting a critical current and an optical count value from a superconducting state to a normal state. The system has the advantages of multi-detector compatibility, high integration level, automatic control and the like.

Aspects of the disclosure relate to a method for understanding the response of any multi-detector device to activated oxygen. The method relies on an expression of a three-dimensional distribution of activated oxygen from fast neutron, and on the expression of three-dimensional gamma ray detection efficiency. A realistic model is derived for the signals measured in the detectors as function of the device-to-oxygen differential velocity.

The invention relates to an uncertainty-driven asteroid visual full-coverage intelligent decision planning method. The method comprises the following steps: initializing a multi-detector state and asteroid surface Fisher information conditional probability distribution; multiple constraints are considered, and a Fisher environment information gain is used for guiding multiple detectors to carry out trajectory planning and environment information acquisition; the Fisher information of the asteroid surface and the uncertainty distribution of the surface environment are continuously updated by utilizing the environment perception information; calculating rewards according to environment feedback, and performing detector detection path decision planning learning and decision model updating by using a reinforcement learning model; evaluating that the Fisher information entropy on the surface of the asteroid is wholly lower than a threshold value or the fuel budget is about to be exhausted, determining that the training process is ended, and storing a decision planning model; and testing an asteroid full-coverage decision planning model which is generated by training and is defined based on a Fisher information model and is driven by environmental uncertainty. According to the invention, the multi-detector based on Fisher information model uncertainty feedback carries out surface visual full-coverage path planning on the asteroid.

The application provides a self-adaptive smoke fire detection method suitable for ancient building environment, and relates to the technical field of fire detection, and comprises the following steps: collecting smoke concentration data of a smoke detector in an ancient building environment, removing invalid data by using an SPC statistical process control method to obtain an optimal data set; based on the optimal data set, calculating the correlation support degree between each smoke detector, and constructing a support matrix; the application effectively removes invalid data by using an SPC control chart, objectively evaluates the reliability of the detector based on the correlation support degree, dynamically integrates multi-sensor information by using a self-adaptive weighted fusion algorithm, and designs a trend threshold algorithm and a field model analysis algorithm for single detector and multi-detector scenes respectively, so that the fire determination strategy and the alarm threshold can be adaptively adjusted according to real-time environmental parameters and interference characteristics, the high sensitivity to real fire is retained, and frequent false alarms caused by traditional use of fire, ventilation airflow and humidity change are effectively inhibited.

Methods and systems are provided for a sample holder for a multi-detector quantitative microscopy system. In one example, the sample holder includes a frame with a central opening, a pivotable arm positioned adjacent to the central opening and having a whippletree assembly at a first end of the pivotable arm, and a movable ram, in contact with a second end of the pivotable arm, the movable ram configured to pivot the pivotable arm.

This invention discloses a violet-infrared flame detector system and its fault detection method based on multi-source information fusion and mutual verification, belonging to the field of fire alarm technology. The system includes multiple violet-infrared flame detectors and a system controller. Each detector stores orientation identification information and a list of adjacent orientations. The detectors form a verification network with detectors of the same orientation through a communication module and establish data exchange links with detectors of adjacent orientations. The data processing module uses statistical methods to calculate the mean and standard deviation of UV pulses in a reference group, constructs a dynamic confidence interval, and compares its own pulse count with the dynamic confidence interval. This invention effectively solves the problem of false alarms caused by interference from a single detector through multi-detector mutual verification, multi-spectral information fusion, and a system self-healing mechanism, significantly improving the reliability and safety of the flame detection system.

The present invention relates to the field of photoelectric detection and simulation test technology, and provides a method, system and device for simulating laser short pulse echoes for detection and tracking. The method comprises the following steps: obtaining the spatial orientation coordinates of several detectors and the spatial orientation coordinates of a laser galvanometer; according to the spatial orientation coordinates of the detector and the spatial orientation coordinates of the laser galvanometer, converting the spatial orientation coordinates of the detector into a local coordinate system centered on the laser galvanometer to obtain the detector coordinates; calculating the azimuth deflection angle of the laser galvanometer according to the azimuth deflection angle of the laser galvanometer; using a step-by-step timing circuit, with the galvanometer driving current parameters as a reference, sequentially driving the laser galvanometer to deflect, so that the laser pulse is captured by several detectors. The present invention can realize time-sharing multiplexing of a single laser source to multiple detectors through dynamic solution of spatial coordinates and precise control of the galvanometer, significantly improving resource utilization.

The invention discloses a cantilever beam photoacoustic gas detection device, and relates to the technical field of photoacoustic spectrum detection. The detection device comprises a multi-wavelength laser, a beam combining assembly, a lens, a roof-shaped prism, a photoacoustic cell with a built-in cantilever beam, a light splitting assembly and a plurality of detectors. Multi-wavelength laser beams are combined, converged through the lens and divided into two beams through the prism, the two beams irradiate the suspended detection end and the fixed frame of the cantilever beam respectively, gas absorbs laser energy to generate sound waves to drive the detection end to vibrate, dynamic interference fringes are formed, the light splitting assembly separates all wavelength fringes, and the multiple detectors collect signals synchronously. The cantilever beam photoacoustic gas detection device provided by the invention is used for improving the detection sensitivity.

The invention discloses a multi-detector data acquisition method, a coincidence processing method, a reconstruction method, a system, imaging equipment, electronic equipment and a storage medium. The multi-detector data acquisition method comprises the following steps: providing a unified memory pool for a plurality of detectors of imaging equipment; continuously receiving detection event data from the plurality of detectors; and writing the detection event data from the plurality of detectors into the unified memory pool according to the arrival time sequence. According to the scheme provided by the invention, time serialization writing and physical continuous storage of the data to the unified memory pool are realized, the calculation overhead of multi-path merging sorting is eliminated, the time complexity of data reading is remarkably reduced, and thus the data acquisition efficiency of a multi-detector system is remarkably improved.

The invention discloses a single-ball neutron spectrometer electronic system, and compared with the prior art, the single-ball neutron spectrometer electronic system is provided with a plurality of independent signal processing channels respectively corresponding to a detector 1, a detector 2,..., and a detector n; the method comprises the following steps: converting and amplifying each path of signal through a charge sensitive preamplifier, correcting the waveform through a polar zero cancellation circuit, outputting a standard pulse through a pulse conditioning module, and respectively sending the standard pulse into a counting module channel 1, a counting module channel 2,..., a counting module channel n in an FPGA (Field Programmable Gate Array) for parallel counting, a counting result is written into an n-channel data RAM (Random Access Memory) cache, is stably operated under the guarantee of clock and Flash configuration, and is finally transmitted to an upper computer through an Ethernet module according to TCP / IP (Transmission Control Protocol / Internet Protocol); and meanwhile, the low-ripple power supply module supplies power to each link so as to reduce noise interference, so that the integrity and stability of counting data acquisition of the multiple detectors are ensured from the structure and the data flow path.

The invention belongs to the technical field of aerospace, and particularly relates to a link time delay calibration method for differential interference measurement of double spacecrafts, which comprises the following steps: determining observation time; setting observation parameters; tracking a calibration radio power supply and a spacecraft to obtain original data of respective signals to be subjected to interference processing; performing interference processing on the original data of the spacecraft to obtain a corresponding interference phase; and calculating the differential interference time delay of the two spacecrafts according to the type of the calibration signal. The method is suitable for link time delay calibration of differential interference measurement of double spacecrafts without fine design of downlink signal frequency points. The method is applied to the conditions that downlink signal frequencies of double spacecrafts are different and interference measurement channels are different, the link time delay is solved by taking a target as an object, target interference measurement processing time delay is calibrated respectively, and high-precision differential interference measurement of the double spacecrafts is supported. The method is suitable for multi-detector differential interference measurement of different downlink signals, and the measurement precision can be greatly improved.

The utility model relates to the technical field of gas detection devices, in particular to a plug-in type fixed gas detector. Comprising a shell, a main control board arranged in the shell and used for processing and transmitting electric signals, a hole formed in the shell, a probe plugging piece matched with the hole and electrically connected with the main control board, and a detector plugged in the jack and used for detecting gas, the detector comprises a first probe provided with a circuit board for processing electric signals of the gas sensor, and a second probe inserted below the first probe and provided with the gas sensor matched with the circuit board. The probe has the advantages of convenience in installation and maintenance, no influence on operation of a monitoring system, simplicity and convenience in calibration and parameter operation and the like, the installation and replacement steps are simplified by a plug-in structure, the safety is improved by a self-locking switch, sensing data are centrally calibrated and processed by the probe, convenience is brought to calibration and plug-in use, and the probe is suitable for a multi-detector network scene.

The invention discloses a heavy fog detector for eliminating illumination difference influence and a method thereof. The heavy fog detector comprises a multispectral parallel acquisition module, a special data processing chip, a self-adaptive wave band selection module, a self-calibration optical path, an MEMS active alignment module and a digital twin maintenance platform. The multispectral parallel acquisition module comprises a wide-angle incidence optical lens, a light splitting assembly and a multi-detector array; the light splitting assembly simultaneously distributes incident light transmitted by the wide-angle incident optical lens to the multi-detector array through different wave bands, the multi-detector array comprises a plurality of independent CMOS image sensors, each sensor corresponds to a specific wave band and is provided with a band-pass optical filter, and the invention relates to the technical field of heavy fog detection. According to the invention, problems that detection signals are distorted under complex illumination due to insufficient adaptability of traditional fog detection equipment to illumination differences, frequent manual calibration is needed, and misjudgment and missed judgment are easy to occur in key scenes such as traffic and aviation are solved.

This invention belongs to the field of well logging control technology, specifically relating to a TNIS Plus control method for thermal neutron imaging saturation logging. Applied to a well logging system including a remote transmission sub, an acquisition sub, and a high-pressure control sub, the method initiates initialization and magnetic positioning calibration by issuing a start command, performs magnetic temperature normalization, and controls the neutron generator to emit thermal neutron beams according to a dynamic pulse timing sequence. The high-pressure control sub provides the anode voltage. Based on timestamps, a multi-detector timing acquisition window is triggered, and sliding integration, energy spectrum layering filtering, and abnormal pulse shielding are performed on the detection data to form structured measurement subframes, which are then encapsulated and uploaded. When a high air recovery rate is detected, compensation sampling logic is automatically triggered to extend the sampling window and adjust the voltage threshold, improving the signal-to-noise ratio and spectral quality. This method achieves high-precision acquisition and stable transmission of well logging data, providing a reliable data foundation for formation water saturation inversion.

The invention belongs to the technical field of logging control, and particularly relates to a thermal neutron imaging saturation logging TNIS Plus control method, which is applied to a logging system comprising a telemetry short section, an acquisition short section and a high-pressure control short section and is used for completing initialization and magnetic positioning calibration and performing magnetic temperature standardization processing by issuing a starting instruction. Controlling a neutron generator to emit thermal neutron beams according to a dynamic pulse time sequence, and providing anode voltage by a high-voltage control short section; triggering a time sequence acquisition window of multiple detectors based on a timestamp, executing sliding integration, energy spectrum layered filtering and abnormal pulse shielding on detection data, forming a structured measurement sub-frame, and packaging and uploading the structured measurement sub-frame; when the detector has a high sampling rate, the compensation sampling logic is automatically triggered, the sampling window is prolonged, the voltage threshold is adjusted, and the signal-to-noise ratio and the spectral shape quality are improved. According to the method, high-precision acquisition and stable transmission of logging data are realized, and a reliable data basis is provided for inversion of stratum water saturation.

This invention discloses a fog detector and method for eliminating the influence of illumination differences. The device includes a multispectral parallel acquisition module, a dedicated data processing chip, an adaptive band selection module, a self-calibrating optical path, a MEMS active alignment module, and a digital twin maintenance platform. The multispectral parallel acquisition module includes a wide-angle incident optical lens, a beam splitter, and a multi-detector array. The beam splitter distributes the incident light transmitted through the wide-angle incident optical lens through different bands to the multi-detector array. The multi-detector array includes several independent CMOS image sensors, each corresponding to a specific band and equipped with a bandpass filter. This invention relates to the field of fog detection technology. This invention solves the problems of insufficient adaptability of traditional fog detection equipment to illumination differences, leading to signal distortion under complex lighting conditions, the need for frequent manual calibration, and susceptibility to misjudgment and missed detection in critical scenarios such as transportation and aviation.

The present application provides a kind of multi-probe image data transmission method, communication instruction sent by imaging control unit to multiple probe units contains time parameter, and also increase a synchronization pulse for reducing the error accumulation caused by communication instruction receiving interval, utilize synchronization pulse so that each probe unit obtains the same time parameter at synchronization pulse moment, keep time by crystal oscillator, and agree to pack transmission with unit of line in image data transmission process.The present application corrects the data transmission time of different detectors, effectively reduces the time interval of different detector transmission data, facilitates image splicing, in addition, the present application also carries out image data transmission with unit of line, reduces the requirement of imaging control unit to image cache ability.