20 results about "Dual detector" patented technology

The invention discloses a tiny unmanned aerial vehicle detection method and system based on target reflectivity, solves the problem that a low-reflectivity target is difficult to detect in a complex environment in the prior art, and realizes recognition of a tiny unmanned aerial vehicle by combining laser active detection and target reflectivity characteristic analysis. The method comprises the following steps: transmitting pulse laser to a target area, and synchronously acquiring a target signal through double detectors with a common-path design to obtain a target geometric feature and a reflectivity intensity signal; calculating an original reflectivity based on the reflectivity intensity signal, obtaining target distance information, and correcting the original reflectivity based on the target distance information to obtain a corrected reflectivity value; target motion features are generated through multi-frame time sequence analysis, the corrected reflectivity value, the target geometric features and the target motion features are fused based on a fusion strategy, and a target comprehensive feature vector is constructed; and inputting the target comprehensive feature vector into a classifier, and outputting an identification result of the tiny unmanned aerial vehicle.

The invention provides a radioactive substance transportation monitoring system, and relates to the technical field of radioactive substance transportation safety monitoring. The radioactive substance transportation monitoring system comprises a transfer protection box and a monitoring unit integrated on the transfer protection box, and the monitoring unit is composed of a double-detector fusion module, a three-dimensional data linkage analysis module and an active emergency disposal module which are sequentially connected through a circuit. The double-detector fusion module comprises a GM counting tube and a scintillator detector which are arranged inside and outside the box so as to realize alpha, beta, gamma and neutron multi-nuclide coverage; the three-dimensional data linkage analysis module performs comprehensive judgment based on internal and external doses of the box, temperature and humidity and vibration data, and accurately identifies protection failure or article leakage; and the active emergency disposal module automatically starts gate closing and adsorption measures in an emergency. According to the system, the problems of monitoring blind areas, reduced protection performance, frequent false alarm, emergency passivity and the like are solved, and the transportation safety and the intelligent level are improved.

This invention discloses a method and system for detecting micro-UAVs based on target reflectivity, solving the problem of low-reflectivity targets being difficult to detect in complex environments in existing technologies. It achieves the identification of micro-UAVs by combining active laser detection with target reflectivity feature analysis. The method includes: emitting pulsed laser light towards the target area; synchronously acquiring target signals through dual detectors with a common optical path design to obtain target geometric features and reflectivity intensity signals; calculating the original reflectivity based on the reflectivity intensity signals and obtaining target distance information; correcting the original reflectivity based on the target distance information to obtain a corrected reflectivity value; generating target motion features through multi-frame temporal analysis; and fusing the corrected reflectivity value, target geometric features, and target motion features based on a fusion strategy to construct a comprehensive target feature vector; inputting the comprehensive target feature vector into a classifier to output the identification result of the micro-UAV.

This invention belongs to the field of high-power semiconductor laser array coupling technology, specifically providing an optical element dispensing and curing system and method based on dual-target monitoring. The system includes a multi-degree-of-freedom precision displacement platform, a vision inspection unit, a dispensing system, a dual-path photoelectric feedback module, and a central control unit. The dual-path photoelectric feedback module includes a beam splitting unit, an optical power detection unit, and a spot imaging detection unit. The beam splitting unit splits the laser beam into two paths, one of which is used for beam analysis to obtain the beam arrangement. The optical power detection unit receives the other beam from the beam splitting unit and provides real-time feedback of its optical power value. The spot imaging detection unit receives the reflected sampled beam. The central control unit integrates an industrial control computer and a motion control card. This invention designs a closed-loop hardware system including a beam splitting prism, dual detectors, and a multi-degree-of-freedom platform to solve the problem of low multi-degree-of-freedom coupling efficiency in existing technologies.

The invention discloses a double-detector linkage automatic fire extinguishing control method and system for an outdoor charging place, and belongs to the technical field of fire safety. The system comprises a water source supply unit, a detection alarm unit, a control execution unit and a fire extinguishing spraying unit. A dual detection mechanism of the temperature sensing detector and the flame detector is adopted, only when the two detectors give an alarm at the same time, the input and output module judges that a fire behavior is real, and signals are synchronously distributed to the automatic control switch, the fire control room and the charging control cabinet. The system provides an automatic, remote and manual three-start mode to ensure the reliability; the charging control cabinet automatically cuts off a power supply to prevent electric shock after receiving the signal; the anti-freezing design that an underground cement pool is combined with an overflow valve emptying pipeline is adopted, and normal operation can be achieved in the environment of minus 35 DEG C. According to the invention, the risk of false alarm of a single detector is thoroughly eliminated, the response time does not exceed 30 seconds, and the technical problems of low fire detection accuracy, poor winter adaptability and lack of power linkage protection in an outdoor charging place are effectively solved.

The invention discloses an X-ray attitude determination method and system based on differential scanning of double detectors, and aims to solve the problems of insufficient ground verification means, mismatch of models and signals, imperfect precision evaluation and the like of the existing X-ray attitude measurement method. By constructing an experimental platform integrating an X-ray source, a differential detection module, an electric control turntable and a height-adjustable device, a scanning process under various attitude parameter combinations is simulated, and a dual-channel photon counting time sequence signal is obtained. Parameters such as a pitch angle and a rotation angular velocity are solved by combining a differential response model with nonlinear fitting, and error statistical analysis and method effectiveness evaluation are carried out on an estimation result. According to the invention, positive and negative discrimination of the pitch angle, high-fidelity data acquisition and closed-loop precision evaluation are realized, and the engineering verifiability of the differential scanning attitude determination method and the robustness of the system are improved.

The invention provides a gas chromatograph with double detectors for parallel detection, and relates to the technical field of material chromatographic analysis, the gas chromatograph comprises a gas chromatograph body, the gas chromatograph body comprises a box body, a sample adding mechanism and a carrier gas conveying pipeline, the sample adding mechanism is embedded in the top of the box body, one end of the sample adding mechanism is connected with the carrier gas conveying pipeline, and the other end of the sample adding mechanism is connected with the carrier gas conveying pipeline. The sample adding mechanism comprises a gasification chamber, a top plate, a driving mechanism and a switching mechanism, and the top plate is integrally formed at the top end of the gasification chamber. It can be ensured that injected samples can be conveyed after being evaporated more thoroughly, and the problem that part of the samples are sent out along with carrier gas before being evaporated is solved. And the position of the carrier gas spray pipe is changed by virtue of the switching mechanism, so that the scraped and collected residues can be blown out, and the period of detaching and cleaning the whole gasification chamber is prolonged.

This utility model relates to the field of online water quality monitoring technology, and provides a total organic carbon (TOC) monitor, including a sample injection component, a syringe pump, an aeration component, a combustion furnace, a flow control component, a flow path filter component, a multi-channel NDIR detector, and a host computer. The sample injection component and the aeration component are both connected to the syringe pump. The sample injection component is connected to the combustion furnace via a sample injection tube. The flow control component is connected to the aeration component and the combustion furnace. The combustion furnace is sequentially connected to the flow path filter component and the multi-channel NDIR detector. The multi-channel NDIR detector is connected to the host computer. The multi-channel NDIR detector used in this utility model is equipped with filters of different wavelengths and dual infrared detectors, capable of detecting CO2 concentrations of 2000 ppm and 500 ppm, enabling the measurement of high-concentration CO2. Furthermore, by adjusting the syringe pump and the flow control component to increase the flow rate, the measurement of low-concentration CO2 can be achieved. This utility model can meet the TOC measurement needs of various scenarios.

The invention discloses a geometric correction method based on a double-detector CT (Computed Tomography) system, which relates to the technical field of CT system correction, and comprises the following steps: placing a phantom, enabling two detectors to respectively appear four small balls, and obtaining projection data; vertically moving the detectors, obtaining double-detector projection, and solving a source object distance and a source screen distance; solving an in-plane inclination angle and an out-of-plane inclination angle of the two detectors; establishing a geometric continuity model to realize continuity correction; rotating the phantom by 180 degrees, and performing motion compensation to obtain a complete projection image; solving a vertical projection point coordinate of a ray source focus on the detector; according to the method, the double-detector CT system is corrected according to the obtained geometric parameters, seamless alignment of a geometric space is achieved by establishing a geometric continuity model, continuity of double detectors is met while high-precision correction of the geometric parameters of the double-detector CT system is guaranteed, and geometric artifacts in reconstructed images are effectively removed.

The invention discloses a neutron-gamma dosimeter based on double detectors and a gamma and neutron dose rate detection method, the neutron-gamma dosimeter comprises a gamma detector, a neutron-gamma detector and a processing module, the gamma detector can only respond to gamma rays and output signals, and the neutron-gamma dosimeter can only respond to the gamma rays and output signals. The neutron-gamma detector can respond to neutrons and gamma rays and output signals, and the processing module can receive the signals of the gamma detector and the neutron-gamma detector, determine the gamma dose rate based on the output signals of the gamma detector, and determine the dose rate of the neutron-gamma detector based on the difference value of the output signals of the gamma detector and the neutron-gamma detector. And determining the neutron dose rate. According to the invention, through combination of the gamma detector and the neutron gamma detector, simultaneous monitoring and dose separation of neutrons and gamma rays are realized, doses of two radiation types can be accurately measured and distinguished, and use requirements in various complex environments are met.

This application discloses an X-ray interferometric dual-detector cooperative detection system and method, relating to the field of X-ray interferometry technology. The system includes: an imaging detector, a counting multi-channel detector, a displacement adjustment system, and a control unit. The displacement adjustment system controls the imaging detector to move onto the incident X-ray path. The imaging detector acquires an interference spot image of the X-rays. The control unit identifies interference fringe regions in the interference spot image and calculates the target movement required for alignment between the counting multi-channel detector and the interference fringe regions based on the center position and relative spatial position of the interference fringe regions. The displacement adjustment system controls the counting multi-channel detector to move onto the incident X-ray path according to the target movement amount. The counting multi-channel detector acquires different phase signals of the X-ray interference fringes. This application improves the acquisition efficiency and temporal resolution of X-ray interferometric signals.

The invention discloses a conductivity-volt-ampere tandem dual-detector ion chromatography system and method. The system comprises a data processing device, a water sample storage tank, an anion leacheate generator, a conductivity detector, a post-column derivatization device and a volt-ampere detector, an outlet of the water sample storage tank is communicated with an inlet of the anion leacheate generator, an outlet of the anion leacheate generator is communicated with an inlet of the conductivity detector, an outlet of the conductivity detector is communicated with an inlet of the post-column derivatization device, an outlet of the post-column derivatization device is communicated with an inlet of the volt-ampere detector, and an outlet of the volt-ampere detector is communicated with an outlet of the water sample storage tank. And the output end of the conductivity detector and the output end of the volt-ampere detector are connected with the data processing device. According to the system and the method, the ion chromatography detection result is relatively accurate.

The utility model relates to the technical field of PET imaging, in particular to a PET imaging system based on rotation of double detectors, which comprises a rotating table, two detector modules arranged on two sides of the rotating table, a motor in driving connection with the rotating table and used for driving the rotating table to rotate, and a controller electrically connected with the motor and used for controlling the rotating table to rotate. The controller controls the rotating table to rotate through the motor, so that the two detector modules can comprehensively collect data of all angles during scanning; by adopting the combined design of the double detector modules and the rotating table, efficient data acquisition in the PET imaging process is realized, the rotating table can stably rotate under the driving of the motor, and the two detector modules can comprehensively acquire data of all angles during scanning. Due to the combined design of the double-detector module and the rotating table, the hardware cost is reduced, the complexity of a signal processing circuit is simplified, and the system cost and the maintenance difficulty are further reduced.

The invention discloses a wood foreign matter space positioning system based on X-ray detection, which relates to the technical field of wood detection and comprises a first X-ray light source, a second X-ray light source, a first detector, a second detector and a data acquisition board electrically connected with the first detector and the second detector. According to the method, the related imaging principle of X-rays is applied, a linear array scanning imaging system is adopted to carry out online detection on the wood plate blank passing through a channel, foreign matters in the wood plate blank can be rapidly detected through an AI algorithm, automatic analysis and calculation are carried out through respective imaging results of two angles, and the spatial position of the foreign matters on the wood plate blank is determined; the system adopts two X-ray emitters and two high-efficiency detectors, the accuracy is improved through cross validation and distortion correction of the double detectors, equipment can be guided to avoid foreign matters, safety is guaranteed, processing waste products can be reduced, and labor and equipment maintenance cost is reduced.

The invention relates to the technical field of mid-infrared spectrum analysis, and discloses a mid-infrared spectrum spectrogram high-precision splicing method and system.The method comprises the steps that an MCT detector is adopted to collect original spectrums according to preset parameters; generating a pre-spectrogram based on the original spectrum, and obtaining an adjusted overlapping region range and a characteristic anchor point peak according to the pre-spectrogram; sequentially carrying out dark current deduction, background and water vapor correction and self-adaptive noise reduction on the original spectrum according to the adjusted overlapping region range, and outputting a purified short-wave / long-wave spectrum containing the overlapping region; according to the purified short-wave / long-wave spectrum, performing baseline correction, peak position correction and intensity correction by using a characteristic anchor point peak, and outputting a corrected spectrum; and fusing the short-wave spectrum and the long-wave spectrum in the corrected spectrum according to the adjusted overlapping region range and a preset rule to generate a complete spliced spectrogram. According to the invention, the defects of non-uniform response of the double MCT detector and the traditional splicing technology are overcome, and efficient and stable support is provided for mid-infrared spectrum analysis.

The invention provides a light ray photoelectron spectrometer, and belongs to the technical field of photoelectron spectroscopy equipment. The device comprises a vacuum magnetic shielding cavity, a hemispherical electron energy analyzer, a double-light-source system, a high and low temperature type sample control board, a double-detector assembly and a data analysis module. According to the invention, the dual-light-source system and the hemispherical electron energy analyzer are integrated, the same equipment supports XPS, UPS and ARPES measurement at the same time, and multi-mode measurement integration is realized. The high-low temperature type sample control console is provided with a low-temperature refrigerating device and a heating device, accurate regulation and control within the range of 4K-1300K are achieved, the wide-temperature-zone sample environment requirement is met, comprehensive characterization of core state energy level electronic information, Fermi surface nearby conduction band electronic information and electronic angle distinguishing information of a sample is completed in a single experiment, and the test result is accurate. And the double-detector assembly and the data analysis module realize high-resolution and high-stability detection, automatic data analysis and standardized output, so that the experiment efficiency is remarkably improved.

The utility model relates to a double-beta plastic scintillator detector based on SiPM readout. The double-beta plastic scintillator detector comprises two hollow plastic scintillators, a SiPM array and a corresponding signal readout circuit, an inflation pipeline, a valve, a reflecting film and a light shielding layer. The two hollow plastic scintillators are stacked away from light; the SiPM array is coupled to the side surface of the hollow plastic scintillator, and the signal-to-noise ratio of the detector is improved by using the SiPM array partition according with the noise reduction technology; the two hollow plastic scintillators pasted with the reflecting films and the light shielding layers are packaged in a stainless steel shell to form a dual-channel beta plastic scintillator detector so as to realize synchronous high-sensitivity measurement of different radioactive gases. According to the utility model, the two hollow plastic scintillators are packaged into the double-beta detector, so that synchronous high-sensitivity measurement of different radioactive gases can be realized. The SiPM is assembled on the side wall of the scintillator, and two oppositely arranged gamma detectors can be adopted for measurement, so that the gamma ray detection efficiency is improved, and the detection sensitivity is further improved.

The invention discloses a voxel feedback-based multi-satellite cooperative asteroid detection path planning method. The method comprises the following steps of: 1, gathering and combining double detectors near an asteroid based on active-disturbance-rejection control to form a stereoscopic vision module; 2, the stereoscopic vision module carries out maneuvering, carries out detection on the surface of the asteroid, carries out stereoscopic perception on the surface of the asteroid, and continuously constructs and updates a voxel map through the obtained perception information; 3, according to the state of the detector and asteroid surface voxel map feedback information, a reinforcement learning model is used for flight path planning and attitude control adjustment of the detector, and a reinforcement learning decision is achieved; and step 4, evaluating a reinforcement learning decision effect through a reward function, continuously adjusting and optimizing reinforcement learning model parameters, and finally achieving efficient and high-quality coverage of the asteroid surface. According to the invention, surface vision full-coverage path planning of the asteroid is realized by the binocular stereo vision camera combined by the double detectors based on active-disturbance-rejection control.

The present invention is entitled "Dual-detector gas detection system." The apparatus and related methods provided herein relate to a gas detection apparatus that includes a primary optical element configured to: (1) direct a first portion of light emitted from a light-generating element to a primary detector via a second optical element (after the first portion of light has interacted with a target medium), and (2) direct a second portion of light emitted from the light-generating element to a reference detector via a third optical element. In various examples, the primary optical element can be a reflector, such as a mirror. The light-generating element may, for example, be one or more red, green, blue (RGB) light-emitting diodes (LEDs). The optical train may, for example, have a single / monolithic molded transparent acrylic construction and internal reflective surfaces. The gas detection apparatus can standardize the optical paths used by the light-generating element and the primary detector / reference detector, thereby advantageously providing reliable operation.

The invention discloses a lightweight calibration integrating sphere for spaceflight, which relates to the field of structural design of space on-orbit optical calibration integrating spheres and comprises a lightweight shell, an optical diffuse reflection sphere, a calibration lamp, a calibration lamp detector and a light outlet. The light-weight shell comprises an upper part and a lower part, the lower part is provided with four through hole interfaces connected with the platform, the upper part and the lower part are in butt joint through six flange interfaces turned out from the edges, the upper shell and the lower shell are in light-weight design, and about 50% of structural weight is saved. The optical diffuse reflection sphere is provided with an upper part and a lower part which are respectively made of 10mm polytetrafluoroethylene materials, and the surface of the optical diffuse reflection sphere needs to be polished to the smoothness required by optical calibration. The calibration lamp comprises three independent lamp holder combinations, and one lamp group is arranged in a radial area of a light-emitting opening at an interval of 120 degrees. The calibration lamp detector comprises two single detector interfaces and two double detector structures. The structural design is obvious in lightweight effect, reasonable in structural distribution and low in space occupancy rate.