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56results about How to "Detection high" patented technology
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Method for optimizing laser radar detection atmospheric composition spectral line analysis
ActiveCN106526614AHigh precisionIncrease credibilityElectromagnetic wave reradiationICT adaptationRadar equationCo2 absorption
The invention provides a method for optimizing laser radar detection atmospheric composition spectral line analysis, through building of an IPDA laser radar equation of hard target reflection, calculation of difference optical thickness of two pulses and CO2 air column mixing rate XCO2 with a weight, single spectral line broadening calculation, absorption cross section calculation, CO2 absorption optical thickness calculation, a weight function profile and a CO2 molecule number density profile, weight function-optimized spectral lines are obtained. The spectral lines obtained by the method have a higher lower-atmosphere weight ratio, and detection is closer to a true value.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Apparatus for detecting joints in rubber sheets
InactiveCN1985147AHigh precisionImprove effectivenessOptically investigating flaws/contaminationUsing optical meansRubber sheetElectromagnetic radiation
A method for detecting defects in, and / or geometrical characteristics of, at least one joint or splice of sheet pieces, in a unloaded state, characterised by the following steps: a. subjecting said joint or splice to a non-unidirectional electromagnetic radiation; b. performing a two-dimensional detection of the radiation reflected or refracted by said joint or splice; c. generating output signals corresponding to said two-dimensional detection; d. determining possible defects or the geometrical characteristics of at least part of said joint or splice, by analysing, said output signals.
Owner:特克斯玛格销售有限公司
Enhanced Raman and infrared double-spectrum device with metal and graphene multi-layer resonant structure and preparation method
ActiveCN108226079AEnhanced local areaDetection highRaman scatteringColor/spectral properties measurementsLaser lightMaterials science
The invention discloses an enhanced Raman and infrared double-spectrum device with a metal and graphene multi-layer resonant structure. The enhanced Raman and infrared double-spectrum device comprisesa substrate, a metal reflecting layer, a dielectric layer, metal micron antennas, graphene films and metal nano particles. The dielectric layer is located among the metal micron antennas and the metal reflecting layer, so as to form a metal-dielectric-metal reflection type micron antenna structure. The graphene films are located among the metal nano particles and the metal micron antennas, so asto form nano gaps. Under the irradiation of an infrared light wave, the antenna resonance effect of the metal micron antennas is excited; an infrared absorption spectrum signal of a trace molecule isenhanced in a wide wavelength range. Under the irradiation of laser light in a visible light waveband, the local-area surface plasmons of the metal nano particles are excited; the nano gaps among themetal nano particles and the metal micron antennas generate a high-intensity local-area electric field resonant mode; a Raman scattering signal of the trace molecule is enhanced, and the enhanced Raman and infrared double-spectrum device has the advantages of being wide in enhancement waveband, high in enhancement factor, low in cost and wide in range of the varieties of detected substances, and can be processed in a large-area manner, and the like.
Owner:CHONGQING UNIV
Flame identifying algorithm based on image processing technologies
InactiveCN104504382ALow system resource usageHigh Stability DetectionCharacter and pattern recognitionAmount of substanceImaging Feature
The invention relates to a flame identifying algorithm based on image processing technologies and belongs to the technical field of fire detecting systems. Flames usually occur during combustion of common substances, the flames that cause fire disasters have obvious image features, and thereby, flame identifying is used as a specific method for fire detection. According to the flame identifying algorithm based on the image processing technologies, a highest point and a gravity center of the flames are found out through inner and outer flame extraction algorithms, coordinates of the highest point and the gravity center are recorded respectively, then a connecting line of the highest point and the gravity center is drawn through the coordinates, a red-green-blue (RGB) value on the connecting line of the two points is extracted, meanwhile, the RGB value on the connecting line of the two points is compared with a standard flame RGB feature library, a matching value is obtained through comparison, and whether the image is a flame image or not is determined according to the matching value.
Owner:DONGHUA UNIV
Safe battery pack
InactiveCN104091904AImprove reliabilityImprove securityBattery isolationFire rescueFire extinguisherEngineering
The invention relates to a safe battery pack, which includes a safe battery pack shell. A plurality of battery sets in series-parallel connection are installed in the safe battery pack shell. The battery set is formed by series-parallel connection of multiple cylindrical single batteries. A fire detection and extinguishing device is mounted in the battery pack shell, and consists of a fire detection tube and an extinguisher. The fire detection tube is mounted in the gaps formed by the adjacent cylindrical single batteries, and is in connection with the extinguisher. The safe battery pack provided by the invention not only can put out a fire quickly after outbreak of the fire, but also can eliminate hidden fire outbreak dangers before sudden change of temperature and fire outbreak, and has the characteristics of good fire extinguishing effect, high fire extinguishing efficiency, high reliability and high safety performance.
Owner:SUZHOU ANKAO ENERGY
Distributed thermal pipeline leakage monitoring system
ActiveCN109442561ARealize full-line leak monitoringPrecise positioningLighting and heating apparatusCentral heating componentsMonitoring systemRefractive index
The invention provides a distributed thermal pipeline leakage monitoring system. The system comprises an optical fiber temperature measuring host, an industrial personal computer and optical temperature measuring cables; the optical fiber temperature measuring host comprises N temperature measuring channels; each temperature measuring channel is correspondingly connected with one optical temperature measuring cable; the optical temperature measuring cables are laid along the pipeline in the whole journey by using a thermal pipeline as a carrier; and the temperature measuring channels send pulsed optical signals to the optical temperature measuring cables, scattered light sent back from the insides of the optical temperature measuring cables is acquired in real time, according to the refraction index of the optical temperature measuring cables and the light intensity of the scattered light, the whole-line temperature and temperature change rate value curve of the thermal pipeline is obtained, the average temperatures and the maximum temperature change rates of to-be-monitored parts are determined according to the lengths, away from the optical fiber temperature measuring host, of the optical cables laid at the different to-be-monitored parts, and whether the thermal pipeline is in the leakage state is judged according to the set temperature change rate threshold value.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES
Selective absorption enhanced wide-spectrum multi-band detection structure and preparation method thereof
ActiveCN109887943AImprove detection efficiency and sensitivityImprove light wave utilizationSolid-state devicesRadiation controlled devicesPhysicsWave band
The invention relates to a selective absorption enhanced wide-spectrum multi-band detection structure and a preparation method thereof. The selective absorption enhanced wide-spectrum multi-band detection structure comprises a plurality of sub-pixel units capable of detecting incident light of different bands, each sub-pixel unit is composed of a square well-shaped microstructure array and a metallower electrode, a photosensitive layer and an upper electrode on the surface of the microstructure array, the size and array spacing of the square well-shaped microstructures in different sub-pixelunits are determined according to the detection bands of the sub-pixel units where the microstructures are located, the square well-shaped microstructure is provided with an opened upper end and a hollow inside to form a resonant cavity, and the adjacent square well-shaped microstructures in the same sub-pixel unit form a resonant cavity. The scheme of the invention solves the problem that a detector structure in the prior art cannot simultaneously realize visible light-near-infrared multi-band absorption enhanced detection.
Owner:XIAN TECHNOLOGICAL UNIV
Method and device for detecting fish school
InactiveCN101339250AHigh detectionTimely detectionAcoustic wave reradiationFish stockingAcoustic wave
The embodiment of the invention discloses a movable termination, comprising a first transmitter module used for transmitting a detective sound wave, a receiver module used for receiving an echo, an analysis module used for analyzing and processing the echo received by the receiver module, and an output module used for outputting the analytical result of the analysis module. The embodiment of the invention also discloses a method used for detecting a fish stock, comprising following steps: the movable termination transmits the detective sound wave and receives the echo, analyzes and processes the echo, and outputs the analyzed and processed result. The embodiment of the invention adopts the method of transmitting the detective sound wave and analyzing the echo and the movable termination device, thereby reaching the effect of timely, conveniently and promptly detecting the fish stock.
Owner:HUAWEI DEVICE (SHENZHEN) CO LTD
Large-dynamic range high-precision optical axis measurement device
ActiveCN106225734AImprove detection accuracyLarge amount of informationUsing optical meansTarget surfaceMeasurement device
A large-dynamic range high-precision optical axis measurement device disclosed by the present invention is composed of a light beam splitting module, an imaging module, a far field recording module and a far field center of mass calculation module. After passing the light beam splitting module, an incident light beam is gathered by the imaging module at a focus position, the far field recording module acquires the light spot distribution, and the far field center of mass calculation module outputs an optical axis direction of the incident light beam. According to the present invention, a light splitting element segments the incident light beam into a plurality of light beams having the same incident direction, and the light spot detection information is increased, thereby improving the light spot detection precision. According to the present invention, by utilizing the light splitting element, the light spot distribution is greater than a target surface area, even though the light spots exceed the target surface area, the optical axis offset of the incident light beam still can be calculated by the intensity distribution of a light spot array, thereby broadening the light spot detection.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Close range target updating cycle calculating method based on secondary radar
ActiveCN104020468AAccurate trackingAccurate monitoringRadio wave reradiation/reflectionRectangular coordinatesRadar
The invention relates to a close range target updating cycle calculating method based on a secondary radar. The close range target updating cycle calculating method includes the first step of generating a remote area, an ordinarily close range area and an extremely close range area in a division mode, the second step of calculating the updating cycle of a target in real time according to the movement situation under the polar coordinates of the target when the target gets close to a secondary radar station and is located within the ordinarily close range area, the third step of converting target processing from a polar coordinate system to a rectangular coordinate system when the target continues to get close to the secondary radar station and is located within the extremely close range area and carrying out track updating and track smoothing on the target on the basis of the rectangular coordinates, the fourth step of calculating the real-time updating cycle of the target according to the track information generated in the third step, storing the updating cycle and finishing processing. By means of the close range target updating cycle calculating method based on the secondary radar, the real-time updating cycle of the target can be obtained, the detection position of the target in the next scanning process can be accurately predicted, the close range target can be tracked and monitored accurately, and false targets can be filtered out more accurately.
Owner:NANJING NRIET IND CORP
Aerial long-distance target following shot system and method
The invention discloses an aerial long-distance target following shot system and method. The system comprises at least three base stations; each base station comprises a base, and an industrial personal computer and a display screen arranged in the base; a wireless communication module, a GPS time service positioning module, a tracking camera, a following shot camera and a holder which are connected with the industrial personal computer are arranged at the top of the base. Target detection is started after the base station is initialized; after the target is tracked successfully, the focal lengths of the two cameras are adjusted at the same time, and the spatial position of the target is broadcasted to the system; all base stations share target information after entering a tracking state,three groups of target imaging information are utilized to determine the specific spatial position of a target, the position of the target at the next moment is predicted, the angle of a holder is adjusted in advance, and the base stations dynamically adjust the focal length of the following shot camera, so that the target always occupies a central area in a following shot picture. The method canquickly detect and stably track a long-distance target in the air, and clearly shoot the flight attitude of the target.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Sweeping robot edge sweeping method based on inertial navigation
ActiveCN111329395ADetection highImprove robustnessCarpet cleanersFloor cleanersClassical mechanicsRoboty
The invention discloses a sweeping robot edge sweeping method based on inertial navigation, which comprises the following steps: S1, a sweeping robot linearly walks until a hard collision sensor is triggered; s2, the sweeping robot retreats by 15 mm; the wall is found by turning 30 degrees in situ along the opposite direction of the wall; during the period, the plurality of soft collision sensorsfeed back the triggering time, the current angle and the initial triggering angle of the wall finding process to the control module. The control module judges the triggering time and the angle difference between the current angle and the initial triggering angle, and when the triggering time is larger than 100 ms or the angle difference is larger than 45 degrees, the control module judges that theadvancing direction of the sweeping robot is parallel to the wall surface; s3, the control module calls a wall-following PID module to control the sweeping robot to walk linearly along the wall; andS4, during linear walking along the wall, the control module calls the winding module to perform winding judgment and escape, and the robot is high in wall adaptability and quick in wall surface detection.
Owner:HUNAN GRAND PRO ROBOT TECH
System and method for diagnosing filter bag damage by laser radar
ActiveCN111189589APrecise positioningFalse positives will not be missedDetection of fluid at leakage pointParticle suspension analysisDetector arrayDust control
The invention relates to a dust concentration abnormity monitoring devices, and aims to provide a system and a method for diagnosing filter bag damage by a laser radar. The system comprises a laser emission unit, a receiving and detection unit and a control and imaging unit; the laser emission unit comprises a counter, a laser driving circuit, a pulse laser and a collimating lens which are arranged in sequence; the receiving and detection unit comprises a lens cone, a reflecting mirror, a filter and a detector array which are arranged in sequence; the pulse laser, the laser driving circuit andthe counter are sequentially connected to the control and imaging unit through a signal line, and the detector array is connected to the control and imaging unit through a signal line; the control and imaging unit comprises a digital-to-analog signal converter and a computer. The system and method provided by the invention can be used for monitoring a bag dust removal cabin in real time, the phenomena of missing and false report of damaged filter bag are avoided, and the daily operation of a waste incineration power plant is not influenced at all. The system is simple to operate, the maintenance workload is small, the monitoring time is short, the feedback capability is strong, the efficiency is high, and missing detection is effectively avoided.
Owner:ZHEJIANG UNIV
Visible-light and infrared multi-dimensional zoom polarization imaging material evidence search system
InactiveCN109471199AImprove imaging clarityImprove image contrastOptical detectionPicture interpretationElectricityElectronics
The invention discloses a quick search system for public security case on-spot material evidences with a visible-light and infrared multi-dimensional zoom polarization imaging detection function, andbelongs to the technical field of multi-spectral multi-dimensional polarization imaging detection. In order to solve problems existing in the prior art, the system comprises an optical detection subsystem, a servo subsystem, an electronics subsystem and a power supply subsystem; the optical detection subsystem is fixedly connected to the servo subsystem and the electronics subsystem, the electronics subsystem receives and processes image information of the optical detection subsystem and then transmits driving signals to the optical detection subsystem and the servo subsystem, and the power supply subsystem is connected with the optical detection subsystem, the servo subsystem and the electronics subsystem for power supply. The system adopts a multi-dimensional detection technology of visible-light polarization and infrared polarization imaging, can be carried on the drone platform to detect a specific area of a complex environment in real time, and a hidden, camouflaged, invisible anddim target can be quickly detected.
Owner:CHANGCHUN UNIV OF SCI & TECH
Method for conducting fast and automatic nondestructive testing (NDT) to heroin hidden in human body
InactiveCN102133106AEasy to operateDetection highForeign body detectionSpecial data processing applicationsHuman bodyHeroin
The invention relates to a method for detecting heroin hidden in a human body, in particular to a method for conducting fast and automatic nondestructive testing (NDT) to heroin hidden in a human body, which is characterized by comprising the following steps: 1) preparing testing equipment; 2) adopting a human body model with hidden heroin as a sample to detect scattering maps of a detector at different angles, and establishing a standard database of the human body model with hidden heroin; 3) adopting a human body model as a sample to detect scattering maps of the detector at different angles, and establishing the standard database of the human body model; and 4) adopting detected human body as the sample in the step 1), taking the scattering map of a detected target in the step 2) at the same scattering angle as a coherence function map, analyzing signal features of high frequency band to be determined whether the human body contains heroin if the coherence function analysis has a peak value at the high frequency band, otherwise, the heroin is not existed in the human body. The method can fast, accurately detect whether the heroin is hidden in the human body without destruction.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Three-dimensional parking garage with fire extinguishing function
PendingCN111550102ADetection highFire rescueElectric vehicle charging technologyParking spaceSmoke Emission
The invention relates to a three-dimensional parking garage with a fire extinguishing function. The three-dimensional parking garage comprises a shelf, a vehicle carrying plate and a lifting driving device; more than one layer parking space is arranged on the shelf, and the position, corresponding to the upper parking space, beside the shelf if provided with a vehicle moving channel; the lower endof the vehicle moving channel leads to the lower part of the shelf; the lifting driving device is arranged on the vehicle moving channel and is used for controlling the vehicle carrying plate to movebetween the upper parking space and the vehicle moving channel; a fire spraying head is arranged on the upper parking space, and the fire spraying head is connected with a water pipe; the upper parking space is further provided with a smoke sensor and / or a flame sensor, and a smoke induction alarm and / or a flame induction alarm are independent existed; or, the smoke induction alarm and / or theflame induction alarm are electrically connected with a controller, and the lifting driving device is electrically connected with the controller; and when the smoke induction alarm and / or the flame induction alarm gives out an alarm, the lifting driving device operates according to the mode set by the controller to remove the vehicle carrying plate of the upper parking space.
Owner:SHAOGUAN FANGSHENG ELECTRIC EQUIP CO LTD
Gallium oxide-based heterojunction integrated photoelectric chip, remote ultraviolet array monitor and manufacturing method of remote ultraviolet array monitor
ActiveCN112038427AContinuously adjustable wavelengthWide range of UV wavelengthsFinal product manufacturePhotometry for measuring UV lightHeterojunctionSingle crystal
The invention relates to a gallium oxide-based heterojunction integrated photoelectric chip, a remote ultraviolet array monitor and a manufacturing method of the remote ultraviolet array monitor. Thegallium oxide-based heterojunction integrated photoelectric chip comprises a sapphire single crystal substrate, a Sn:beta-Ga2O3 circular film and a composite film which are sequentially arranged, wherein the composite film comprises a La2O3 film, a ZnO film, a NiO film, a Tb2O3 film, a Ta2O5 film, a Sm2O3 film, an Nd2O3 film and a Zn:beta-Ga2O3 film which are located on the same plane and arrangedinto a circle, and further comprises an upper Ti / Au film electrode and a lower Ti / Au film electrode which are in one-to-one correspondence, the upper Ti / Au film electrode is formed on the composite film and is in one-to-one correspondence with the La2O3 film, the ZnO film, the NiO film, the Tb2O3 film, the Ta2O5 film, the Sm2O3 film, the Nd2O3 film and the Zn:beta-Ga2O3 film, and the lower Ti / Aufilm electrode is located on the Sn:beta-Ga2O3 circular film. The gallium oxide-based heterojunction integrated chip prepared by the invention is stable in performance, has high responsivity and sensitivity to a broadband ultraviolet spectrum, is low in dark current, can intelligently identify the wavelength of ultraviolet rays, and has a great application prospect.
Owner:杭州紫芯光电有限公司
Three-dimensional detection method for use before exploitation of working surface coal bed
ActiveCN102645674BIncrease the omni-directional transient electromagnetic detection technologyRealize Stereo DetectionWater resource assessmentDetection using electromagnetic wavesElectricityGeological structure
Owner:HEBEI COAL SCI RES INST
Frequency estimation device, terminal and computer readable medium
ActiveCN109613334AImprove accuracyAchieve inhibitionFrequency measurement arrangementSatellite radio beaconingIntegratorCoherent integration
The invention relates to a frequency estimation device, comprising at least a primary frequency sweeping unit. A frequency sweeper comprises a local NCO, first to fourth multipliers, a first subtractor connected to the first and third multipliers and used for outputting a positive phase branch frequency mixing result of a forward frequency mixing signal, a first coherent integrator connected to the first subtractor and used for outputting a first coherent integration result according to the received positive phase branch frequency mixing result of the forward frequency mixing signal, a first adder connected to the second and fourth multipliers and used for outputting an orthogonal branch frequency mixing result of a forward frequency mixing signal, a second coherent integrator connected tothe first adder and used for outputting a second coherent integration result according to the received orthogonal branch frequency mixing result of the forward frequency mixing signal, and a first amplitude calculator used for performing calculation to obtain a first MAG value according to the received first coherent integration result and the second coherent integration result, and the first amplitude calculator is further connected to a frequency estimator, and the frequency estimator estimates and outputs the frequency of the continuous wave signal based on the first MAG value.
Owner:COMNAV TECH
Composite glass optical fiber for synchronously detecting optical signals, electrical signals and chemical signals and preparation method of composite glass optical fiber
InactiveCN110776253ASmall difference in refractive index distributionGood light transmissionGlass making apparatusMeasurement devicesGlass fiberLight spot
The invention discloses composite glass optical fiber for synchronously detecting optical signals, electrical signals and chemical signals and a preparation method of the composite glass optical fiber. The composite glass optical fiber structurally includes glass cladding, a light-guiding glass fiber core, a conductive metal core and a noble metal micro-nano particle end surface, wherein the light-guiding glass optical fiber core layer is located at an optical fiber axis, and the conductive metal core is located in the middle area of the light-guiding glass fiber core and the outer cladding. The composite glass optical fiber can be used for realizing efficient transmission and recording of the optical signals, the electrical signals and the chemical signals, and the composite glass opticalfiber is expected to be widely used in the fields of neuroscience, biosensing, environmental monitoring and the like. Compared with current glass optical fiber and silica optical fiber, the compositeglass optical fiber has optical functions, electrical functions and chemical detection functions. Compared with polymer optical fiber, the composite glass optical fiber has high mechanical strength,uniform refractive index distribution, small light spots and good light transmittance performance.
Owner:SOUTH CHINA UNIV OF TECH
Photoacoustic sensing device and method
ActiveCN113189013ASolve the problem of low utilization efficiency of the acoustic areaDetection highColor/spectral properties measurementsSound sourcesLight spot
The invention discloses a photoacoustic sensing device and method. The device comprises a light source module, a multi-pass cell and a photoacoustic signal detection and data processing module, wherein the multi-pass cell comprises a spherical reflector I and a reflector II which are fixed on two cage plates of a cage type structure, excitation light beams output by the light source module are coupled into the multi-pass cell, the excitation light beams are folded multiple times through the two spherical reflectors, the tracks of the excitation light beams are distributed on the same plane in a vibration arm gap of a quartz tuning fork, light spot patterns in single-line distribution are generated on the two reflectors, the quartz tuning fork is arranged at the central position of the optical axis of the multi-pass cell, and a folded light beam generates a plurality of sound sources along the symmetry axis of the quartz tuning fork, so that the quartz tuning fork can be excited by the plurality of sound sources at the same time, more sound waves are effectively collected, and photoacoustic signal output is enhanced. According to the invention, the technical problems of low sound field detection efficiency and weak photoacoustic signals caused by the fact that a traditional quartz enhanced photoacoustic spectrum gas sensing system only has one sound source are solved.
Owner:SHANXI UNIV
Large target surface continuous zooming optical system
The invention relates to a large target surface continuous zooming optical system, comprising a front fixed group, the focal power of which is positive, a zooming group, the focal power of which is negative, a compensation group, the focal power is negative and a rear fixed group, the focal power of which is positive; and the zooming of the optical system is realized through the corresponding movement of the zooming group and the compensation group. The target surface of the continues zooming optical system is 1 inch, which is applicable to a high definition CCD or a CMOS, wherein the pixels are 1920*1082, the size of the pixel is 7.4 Mum, and the target surface is 1 inch. The continues zooming optical system is also applicable to the CCD or the CMOS camera, wherein the pixels are 1920*1080, the size of the pixel is 5.5 Mum, and the target surface is 2 / 3 inch. The focal length of the optical system is 35mm-700mm, greatly improves the long distance observation capability, adapts to the skyborne optoelectronic system, can detect a long-distance object, improves the capabilities of observing, striking and long-distance identification, and has a wide application range.
Owner:凯迈(洛阳)测控有限公司
A Distributed Thermal Pipeline Leakage Monitoring System
ActiveCN109442561BRealize full-line leak monitoringPrecise positioningLighting and heating apparatusCentral heating componentsRefractive indexMonitoring system
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES
A Flame Recognition Algorithm Based on Image Processing Technology
InactiveCN104504382BReduce resource usageQuick identificationCharacter and pattern recognitionCombustionImaging processing
The invention relates to a flame recognition algorithm based on image processing technology, belonging to the technical field of fire detection systems. Combustion of common substances usually produces flames, and the flames produced by fires have obvious image features, so flame recognition is used as a specific method of fire detection. The patent of the invention mainly finds the highest point and the center of gravity of the flame through the extraction algorithm of the inner and outer flames, and records the coordinates of the two points respectively; then makes a line connecting the two points and extracts the RGB value on the line connecting the two points; The RGB value on the line is compared with the standard flame RGB feature library, and a matching value is obtained by comparison, and then whether the image is a flame image is determined by the size of the matching value.
Owner:DONGHUA UNIV
Infrared detecting method for concealed fire spot of self-ignition coal in coal tunnel
InactiveCN1095540CSpontaneous combustion achievedFew influencing factorsRadiation pyrometryDust removalCoal spontaneous combustionField strength
The invention relates to an infrared detection method for the hidden fire source point position of coal spontaneous combustion in coal mines, which is used for short-distance detection and prediction of coal spontaneous combustion in underground coal mines. By arranging measuring points in the coal roadway, measuring the infrared radiation energy field strength of the measuring points, finding out the easily oxidized area of the coal roadway and the abnormal temperature area of the concealed fire source, by analyzing the two-dimensional unsteady state of the loose coal body in the coal roadway. The heat conduction equation of the heat source is reversed and solved to determine the location of the concealed fire source. Infrared detection does not need to touch the measured object, is less affected by underground factors, and has high sensitivity, which can realize early prediction and prediction of coal spontaneous combustion in coal roadway; simple operation, rapid detection, convenient underground application, and low detection cost.
Owner:YANKUANG GRP CO LTD +1
Anti-aliasing rotation dislocation array antenna
ActiveCN112768955ADensify the number of sampling pointsDetection highIndividually energised antenna arraysSoftware engineeringMechanical engineering
The invention discloses an anti-aliasing rotation dislocation array antenna, which is characterized in that a first sub-array antenna, a second sub-array antenna and a third sub-array antenna are arranged in a U shape, the second sub-array antenna is parallel to the third sub-array antenna, the first sub-array antenna is perpendicular to the second sub-array antenna and the third sub-array antenna, the first array antenna and the positive direction of the x axis of the coordinate system form an angle of 45 degrees, and the first array antenna and the positive direction of the y axis of the coordinate system form an angle of 45 degrees; the fourth sub-array antenna is parallel to the first sub-array antenna; the distances between the antenna units at the two ends of the fourth sub-array antenna and the antenna unit at the end, which is away from the first sub-array antenna, of the second sub-array antenna and the antenna unit at the end, which is away from the first sub-array antenna, of the third sub-array antenna are both the value shown in the description. According to the invention, the number of sampling points of a visibility function is increased, and the detection sensitivity of the system is improved while the detection non-aliasing area is enlarged, so that the inversion imaging area is widened, and the clarity of the inversion image is improved.
Owner:SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
Human eye detecting method and apparatus
InactiveCN100465985CQuick checkDetection highCharacter and pattern recognitionEye diagnosticsComputer scienceHuman eye
The present invention uses the following steps to survey eyes in given image: reading in image, analysing the image to obtain candidate eye zone listing as unchecked candidate eye zone being selected, confirming an adjacent area for selected candidate eye zone and calculating adjacent area size S to obtain dark field, counting dark field and recording the counting value as N, comparing specific value N / S with preset first threshold and determining abovesaid candidate eye zone to be false eye zone to delete it out from listing if specific value N / S is less than the first threshold, otherwise candidate eye zone being true one to keep it in listing, repeating abovesteps till all candidate eye zone being checked and to output listing for post-processing.
Owner:CANON KK
Stainless steel square welded pipe welding seam eddy current online detection device
PendingCN110887895AGuaranteed reliabilityEnsure consistencyMaterial magnetic variablesMetallurgyEngineering
The invention relates to a stainless steel square welded pipe welding seam eddy current online detection device. The stainless steel square welded pipe welding seam eddy current online detection device comprises a base, a vertical height adjusting mechanism arranged on the base, a horizontal displacement adjusting mechanism arranged on the vertical height adjusting mechanism, an elastic up-down movement mechanism movably arranged on the horizontal displacement adjusting mechanism in the vertical direction, and a rolling mechanism and an eddy current point probe mechanism which are arranged atthe bottom part of the elastic up-down movement mechanism. Compared with the prior art, eddy current online flaw detection of a stainless steel square welded pipe can be more simply and conveniently achieved without additionally starting another production line, and the stainless steel square welded pipe welding seam eddy current online detection device just needs to be installed at the tail end of a water swelling square pipe production line, saves time and labor and is flexible and reliable; and the stainless steel square welded pipe welding seam eddy current online detection device ensuresthe consistency of lift-off distances in the eddy current point type probe detection process, avoids the influence of the lift-off effect in the detection process, and finally guarantees the reliability of the detection result.
Owner:SHANGHAI INST OF TECH
Broadband detecting photoelectric detector
ActiveCN105514186ADoes not affect long-wave band detectionDetection highSemiconductor devicesPhotovoltaic detectorsBroadband
The invention discloses a broadband detecting photoelectric detector and a preparation method thereof. The photoelectric detector has a semi-cylindrical structure and mainly comprises the components of a GaAlAs / GaAs photoelectric cathode 1, an anode 2 for collecting electrons, a glass window 3, a housing 4, a package base 5, an anode 6 and pins 7,8. The GaAlAs / GaAs photoelectric cathode 1 is composed of an n-type GaAs substrate, an Si3N4 antireflection coating, a GaxlAll-x1As buffer layer 1, a Gax2All-x2As buffer layer 2, a p-type GaAs transmission layer, a Cs / O activation layer, wherein the n-type GaAs substrate, the Si3N4 antireflection coating, the GaxlAll-x1As buffer layer 1, the Gax2All-x2As buffer layer 2, the p-type GaAs transmission layer and the Cs / O activation layer are successively arranged from bottom to top. The buffer layers comprise the GaxlAll-x1As buffer layer 1 and the Gax2All-x2As buffer layer 2. A gradient doping mode and an index doping mode are utilized respectively. The two buffer layers are GaAlAs with different Al component. The broadband detecting photoelectric detector is advantageous by realizing photoelectric detection with advantages of broad band, high precision, high sensitivity and high response speed.
Owner:CHINA JILIANG UNIV
A kind of lanthanum manganate/semiconductor metal oxide composite gas sensitive material and preparation method thereof
ActiveCN105044160BConducive to large-scale industrial useImprove gas sensing performanceMaterial resistanceManganateOxide composite
The invention discloses a lanthanum manganate / semiconductor metal oxide composite gas-sensing material and a preparation method thereof, which is characterized in that the composite gas-sensing material is composed of semiconductor metal oxide and lanthanum manganate. Compared with pure semiconducting metal oxides, the gas sensing performance of LMO / semiconducting metal oxide composite gas sensing materials has been improved by more than 70%.
Owner:UNIV OF SCI & TECH OF CHINA
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