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Systems, Methods, and Apparatuses for Spectrum-Sensing Cognitive Radios
InactiveUS20070091998A1Fast detectionLow power consumptionPicture reproducers using cathode ray tubesPicture reproducers with optical-mechanical scanningMedia access controlCognitive radio
Systems, methods, and apparatuses are provided for spectrum-sensing cognitive radios that are operative to detect and utilize available RF spectrum resources. The spectrum-sensing cognitive radios include at least one antenna and a frequency-agile radio front-end module in communication with the at least one antenna and configured to transmit and receive radio frequency signals via the at least one antenna. In addition, a spectrum-sensing module, which may include one or both of coarse-sensing and fine-sensing modules, may be in communication with the at least one antenna and be configured to generate RF spectrum usage information. A medium access control (MAC) module is operative to receive the RF spectrum usage information from the spectrum-sensing module. Based upon the received RF spectrum usage information, the MAC module is operative to direct a frequency of operation of the radio front-end module based at least in part on the received spectrum usage information.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
Method and device for monitoring power transmission line
InactiveCN101614602AWide operating temperature rangeWork reliablyAcceleration measurementThermometers using physical/chemical changesEngineeringHandling system
The invention relates to monitoring technology of power transmission lines, in particular to technology for monitoring ice coating and waving states of the power transmission lines. The invention discloses a method and a device for monitoring the power transmission line by using fiber sensors in real time. The method for monitoring the power transmission line is characterized by comprising the following steps: arranging the fiber sensors along the power transmission line to detect characteristic parameters of different positions of a lead; and judging the state of the power transmission line according to the analysis of the characteristic parameters. The device for monitoring the power transmission line comprises the fiber sensors and a signal transmitting and processing system, and is characterized in that the fiber sensors are arranged along the length direction of the power transmission line and used for detecting and transmitting the characteristic parameters of the different positions of the power transmission line. The method and the device are used for monitoring the ice coating and waving states of the power transmission lines, can fully exert the advantages of the fiber sensors to carry out multi-parameter real-time on-line detection, and have the characteristics that the device has long service life and can work for long time reliably under on-site severe environment conditions.
Owner:SICHUAN HUIYUAN OPTICAL COMM CO LTD
Pile bottom cave sonar detection device and method
The invention discloses a pile bottom cave sonar detection device and method. The signal output end of a three-dimensional electronic compass it connected with the compass signal input end of a single-chip microcomputer. The signal input end of a sonar stress wave driving module is connected with the signal output end of the single-chip microcomputer. The stress wave driving signal output end of the sonar stress wave driving module is connected with a sonar stress wave transmitter. A sonar stress wave receiving sensor is connected with the sonar signal input end of the single-chip microcomputer through a sonar stress wave signal processing module. The communication end of the single-chip microcomputer is connected with an on-site host through a communication cable. A sonar detection probe is perpendicular to the bottom of a pile. The pile bottom cave sonar detection device and method, which are provided by the invention, can carry out detailed karst cave or weak rock detection on an area below the pile bottom, and can accurately determine whether a karst cave or weak rock is in a pile bottom detection range, wherein the karst cave or the weak rock influences the bearing capacity of the pile bottom.
Owner:WUHAN CHANGSHENG ENG EXPLORATION TECH DEV CO LTD
Hartmann wavefront sensor based on unit photo-sensitive detector array
ActiveCN102967380AFast detectionReduce the amount of probe informationConverting sensor output opticallyWavefront sensorSpatial light modulator
The invention discloses a hartmann wavefront sensor based on a unit photo-sensitive detector array. The hartmann wavefront sensor consists of a phase spatial light modulator, a microlens array, a single-mode fiber array and the unit photo-sensitive detector array, wherein the front two-order binary phase modulation is carried out on sub-light waves in each sub-aperture of the hartmann wavefront sensor by the phase spatial light modulator at the same time; the modulated sub-light waves are respectively coupled into the single-mode fiber array of a focal plane to achieve mode selection filtering after the micro-lens array is arranged on the phase modulator, and the light intensity after the mode selection filtering is received by the unit photo-sensitive detector array; and wavefront slope information inside each sub-aperture is solved by processing light intensity data, and finally an incident light wave wavefront is rebuilt by using a hartmann wavefront sensor wavefront mode recovery algorithm. According to the hartmann wavefront sensor based on the unit photo-sensitive detector array, the quantity of probe units is reduced, and the problem of decreasing of wavefront measurement accuracy caused by facula discrete sampling is avoided, so that the wavefront measurement accuracy is not affected by decreasing of the quantity of the probe units, and the hartmann wavefront sensor can be applied to the field of high-speed and high-precision wavefront detection.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
Dam latent danger detecting underwater robot system and detecting method
InactiveCN1584584AFast detectionQuick Safety MonitoringMaterial analysis using sonic/ultrasonic/infrasonic wavesManipulatorSound imageDevice form
Owner:HARBIN ENG UNIV +1
Method for detecting concentration of acrylamide in solution
ActiveCN104634853AIncrease surface areaStrong electrochemical signalMaterial electrochemical variablesDifferential pulse voltammetryGraphene
The invention provides a method for detecting the concentration of acrylamide in a solution. The method comprises the steps of detecting acrylamide in a sample solution by using a three-electrode system and a differential pulse voltammetry; and obtaining the concentration of acrylamide in the sample solution according to a differential pulse voltammetry curve of acrylamide, wherein a working electrode in the three-electrode system is an aminated graphene and single-chain DNA modified electrode. The invention also provides concrete steps for detecting the concentration of acrylamide in the solution and a preparation method of the working electrode. The content of acrylamide in the solution can be rapidly and quantitatively detected, and the detection limit of acrylamide can be up to 5.1*10<-8>mol / L.
Owner:浙江永金生物科技有限公司
Deep water net cage fish school status remote real time monitoring instrument based on acoustic multi-beam
InactiveCN101334473AImprove distributionShorten the timeTransmission systemsAcoustic wave reradiationEngineeringArray element
The invention discloses an acoustic multi-beam-based remote real-time monitor of fish shoals in a deep water net cage, relating to a monitoring device. The invention provides the acoustic multi-beam-based remote real-time monitor of the fish shoals in the deep water net cage which has flexible marine operation, easy placement and strong anti-wave capability. The acoustic multi-beam-based remote real-time monitor is provided with a detection signal transmitting and echo collection device, a data analysis and image display device and a data wireless transmission device. The detection signal transmitting and echo collection device is provided with an annular transducer array and a control box, and the annular transducer array is provided with single beam transducer array elements; the control box is provided with a power supply, a controller, a detection signal generator, a power amplifier, a signal collection and preservation circuit and a signal pre-treatment circuit. The data analysis and image display device is used for realizing the remote detection and the control operations on a bank station, carrying out the analysis of the received monitoring data of the fish shoals in the net cage and carrying out the image display of the result. The data wireless transmission device is connected with the detection signal transmitting and echo collection device and the data analysis and image display device.
Owner:XIAMEN UNIV
Ringback detection circuit
InactiveUS7085370B1Fast detectionDecrease energy levelSpeech analysisAutomatic exchangesEngineeringElectrical and Electronics engineering
A ringback detector determines whether ringback by comparing measurements of a characteristic of the received signal, such as the energy of the received signal, to a threshold. The threshold is set initially to a low value and then updated based on the measurements of received signal. The measurements are then compared to the threshold to determine whether ringback is present. An output signal indicative of ringback is generated when ringback is present.
Owner:ERICSSON INC
Ground-and-air nuclear magnetic resonance underground water detecting system and ground-and-air nuclear magnetic resonance underground water detecting method
ActiveCN106908847AGreat signal strengthControl flight altitudeDetection using electron/nuclear magnetic resonanceEngineeringTransmitter
The invention provides a ground-and-air nuclear magnetic resonance underground water detecting system and a ground-and-air nuclear magnetic resonance underground water detecting method. The system comprises two grounding electrodes which are connected with a transmitter through transmitting lead. The transmitter is controlled through a ground master control system. The transmitter transmits excitation current with frequency of local Larmor frequency to ground through changing emission current of the grounding electrodes. A receiving coil which is loaded on an aerial vehicle acquires a nuclear magnetic resonance signal which is generated by magnetic moment precession. The ground master control system performs remote controlling on transmission and stoppage of the excitation current through a communication module. The ground master control system makes a receiver which is connected with the receiving coil acquire the nuclear magnetic resonance signal in a gap when the excitation current is stopped through the communication module. The acquired nuclear magnetic resonance signal is transmitted to an upper computer through the communication module. The ground-and-air nuclear magnetic resonance underground water detecting system and the ground-and-air nuclear magnetic resonance underground water detecting method has advantages of large ground transmitting and detecting depth, high resolution, wide air receiving and detecting range, high detecting speed and effective underground water resource detecting range.
Owner:JILIN UNIV
Method and device for automatically detecting explosive substances in luggage by using multi-view X rays
ActiveCN101592579AFast detectionEasy feature matchingImage analysisSpecific gravity measurementX-rayDual energy
The invention discloses a method for automatically detecting explosive substances in luggage by using multi-view X rays, which comprises the following steps: firstly, acquiring image signals of detected luggage object from various views; secondly, subjecting the image signals from various views to material automatic detection, namely, dividing dual-energy X ray images, performing the material feature recognition of the high and low energy images obtained after division according to a dual-energy X ray material discrimination theory, obtaining dangerous regions in accordance with the material features of the explosive substances, and making positions proper for participating in density calculation; thirdly, subjecting the result of the division of the dangerous regions to density automatic detection, namely, matching the dangerous regions according to matching rules, finding out all dangerous regions of the same object, and obtaining the value of the density of the dangerous regions by using multi-view reconstruction calculation; and finally, according to the results of the material automatic detection and the density detection, determining whether or not to give an alarm for the luggage object. The method has the advantages of quick detection, easy feature matching, high detection precision and high detection efficiency.
Owner:THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
Real dual-energy multi-view X ray luggage explosive substance automatic detection device
InactiveCN101592622AImprove detection accuracyFast detectionMaterial analysis by transmitting radiationDual energySignal processing circuits
The invention discloses a real dual-energy multi-view X ray luggage explosive substance automatic detection device, which comprises a system control and signal processing circuit unit, a comprehensive processing computer, a detection unit, a conveyer and a conveying passage, wherein the detection unit is arranged in the conveying passage and comprises a left bottom photo prospective module adopting a real dual-energy X ray detecting mode as well as a left top photo prospective module and a right bottom prospective module both of which adopt a one-source dual-detection dual-energy X ray detecting mode. During use, the conveyer conveys luggage to the conveying passage, three-view X rays perform the transmission scanning of the luggage, the detector receives a signal and transmits the signal to the system control and signal processing circuit unit for processing, the result of the processing is transmitted to the comprehensive processing computer, the automatic detection of the explosive substances in the luggage is performed in the comprehensive processing computer, and the detection results are displayed on the comprehensive processing computer. The device has the advantages of high detection precision, quick detection, high detection sensitivity and strong interference-resistance capability.
Owner:THE FIRST RES INST OF MIN OF PUBLIC SECURITY +1
Double separation wollaston prism high-resolution simultaneous polarization-imaging system
ActiveCN102707452ACompact structureImprove stabilityPicture taking arrangementsOptical elementsPrismHalf wave
The invention relates to a double separation wollaston prism high-resolution simultaneous polarization-imaging system, comprising a pre-position telescopic system, an amplitude-splitting module, an aperture separating module and two large-planar-array CCDs (Charge Coupled Devices), wherein a target object radiates through the pre-position telescopic system to obtain a compression collimated light beam, and the compression collimated light beam is irradiated into the amplitude-splitting module and is divided into two vertically emitted paths, wherein one path passes through the aperture separating module consisting of a half-wave plate with an azimuth angle of 0 DEG and the wollaston prism and then is divided into two paths with different polarization states, the two paths are emitted in the form of an included angle, two parts of target object images are displayed on one of the two large-planar-array CCDs; the other path passes through the aperture separating module consisting of the half-wave plate and the wollaston prism to be divided into two paths of a polarization state, the two paths are emitted in the form of an included angle, two different parts of target object images are displayed on the other large-planar-array CCD, and finally the synchronous imaging of four polarization states is realized on the two large-planar-array CCDs through one exposure. The invention solves the limitation in application that the energy utilization ratio of amplitude-splitting synchronous polarization imaging is low, four sets of optical systems respond inconsistently and the like.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
High-power laser wave front measuring instrument and wave front measuring method
InactiveCN102564611ASimple and clear operationFast detectionOptical measurementsCcd cameraHigh power lasers
Owner:XIDIAN UNIV
Method for rapidly measuring speed of flying target by fixed single station
InactiveCN101937080AImprove measurement and control performanceFast detectionUsing reradiationContinuous measurementFast measurement
The invention discloses a method for rapidly measuring the speed vector of a flying target by a fixed single station. The method comprises the following steps of: directly sending a beacon signal to a land station or indirectly reflecting a detection signal of an irradiator on the premise of assuming that an aerocraft linearly moves at a constant speed and reaches a measuring node (3) from a measuring node (1) and through a measuring node (2); continuously measuring the signal for at least three cycles by the land station with the Doppler frequency shift measuring function to derive the operation speed of the aerocraft through the following formula shown in the specification, wherein the method can accurately measure and calculate the operation speed of the aerocraft in a short time so as to favorably improve the measurement and control performance of the land station. The method is practically used for directly detecting the operation speed vector of a spacecraft. The method of the invention is simple and can also be directly applied to the passive positioning of a signal station under the condition that the central frequency of a target radiation signal is captured.
Owner:CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
Method for analyzing and detecting pathogenic microorganisms
InactiveCN101776610AAvoid lostReduce consumptionChemiluminescene/bioluminescenceBiological testingMicrosphereOrganism
The invention relates to a method for analyzing and detecting pathogenic microorganisms, which comprises the following steps: (1) filling immunological microspheres modified by antibodies into an immunological recognition / enrichment cavity; (2) introducing a sample solution to be measured into the immunological recognition / enrichment cavity to be recognized, captured and enriched by the immunological microspheres; (3) respectively transferring a cracking agent and a biological luminous reagent into the immunological recognition / enrichment cavity to carry out cracking reaction and biological luminous reaction with the enriched pathogenic microorganisms to generate a luminous composite; and (4) eluting the luminous composite generated in the step (3) with a buffer solution, and analyzing the pathogenic microorganisms in the sample to be measured through luminous detection. The method realizes separation / enrichment, inclusion cracking, biological luminous reaction and quantitative detection of the pathogenic microorganisms on the same micro-fluidic chip, not only reduces the consumption of the sample and the reagent but also avoids complicated operation, overlong analysis time and sample loss caused by a plurality of analysis steps or processes, and improves the analysis speed, the detection accuracy and the detection sensitivity.
Owner:ARMY MEDICAL UNIV
Method for detecting surface defects on a substrate and device using said method
ActiveUS20090051930A1Fast detectionQuick checkSemiconductor/solid-state device testing/measurementOptically investigating flaws/contaminationRelative displacementSlip line
A method for detecting surface defects, such as slip line type defects, on a substrate designed to be used in electronics, optoelectronics or analogue, including projection of a pattern of light fringes and dark bands onto the substrate, relative displacement of the substrate relative to the pattern, acquisition of a sequence of at least three images of the pattern reflected by the substrate to a sensor, the images corresponding to displacement of the fringes of the pattern, determination of the gradient of the surface of the substrate using displacements of fringes of the pattern, and determination of the presence of a surface defect on the substrate using variations in the gradient of the surface of the substrate. Another embodiment comprises a device using said method.
Owner:ALCATECH SEMICON +1
Non-coherent detection system and method for short-wave broad-band channel
ActiveCN102647241AHelp experienceQuick detectionBaseband system detailsTransmission monitoringSignal-to-noise ratio (imaging)Image resolution
The invention relates to the technical field of communication and discloses a non-coherent detection system and method for a short-wave broad-band channel. According to the system and the method, after being filtered and amplified, a short-wave signal enters into a non-coherent demodulation device so as to be demodulated, and then is subjected to signal detection; when a signal is detected, the signal accumulated energy is compared with a set SNR (Signal to Noise Ratio) threshold value, if the signal accumulated energy is greater than the threshold value, the channel bandwidth is automatically regulated, and fine detection is carried out; and the detection method is repeatedly carried out until the accumulated energy is not greater than the set SNR threshold value, and then detection is finished. According to the technical scheme adopted by the invention, signals are not subjected to any assumption, a blind detection algorithm is adopted, any prior knowledge of detection signals is not required to be known; the technical scheme is low in complexity, mature in technology and easy to realize; and the system and the method can be used for regulating the sizes of the resolution bandwidth and the detection signals, finally realizing the rapid detection on the short-wave broad-band channel quality and meeting the user experience.
Owner:西安烽火电子科技有限责任公司
Near infrared BODIPY (Boron Dipyrromethene Compounds) hydroxyl radical probes and synthesis method and usage thereof
InactiveCN103342720AEfficient detectionEfficient detection and detectionGroup 5/15 element organic compoundsBiological testingInfraredDiphenyl phosphate
The invention discloses a kind of near infrared boron dipyrromethene compounds (BODIPY) based on duplex thiophene pyrrole groups. The near infrared boron dipyrromethene compounds have the following structure: FORMULA, wherein the group at meso site is changed to obtain a series of hydroxyl radical probes. The BODIPY hydroxyl radical probes based on 3,5-(diphenyl phosphate styryl) are synthesized for the first time in the invention, the 3,5 site groups of the BODIPY are introduced into the group, so that the absorption spectrum red shift of the probe reaches 630nm, the emission peak reaches 650nm and is located within the range (650-900nm) of a biological window, and meanwhile, the fluorescence quantum efficiency of the probe is high. Moreover, the kind of probes can be used for efficiently and quickly detecting hydroxyl radicals and can be successfully applied in biological imaging. Therefore, the probes have a brilliant application prospect of detecting the hydroxyl radicals in biological systems.
Owner:NANJING UNIV
Detection system for segment including specific sound signal, method and program for the same
ActiveUS20070156401A1Fast detectionReduce the amount of calculationElectrophonic musical instrumentsDigital data information retrievalDegree of similarityPattern recognition
The present invention is a detection system of a segment including specific sound signal which detects a segment in a stored sound signal similar to a reference sound signal, including: a reference signal spectrogram division portion which divides a reference signal spectrogram into spectrograms of small-regions; a small-region reference signal spectrogram coding portion which encodes the small-region reference signal spectrogram to a reference signal small-region code; a small-region stored signal spectrogram coding portion which encodes a small-region stored signal spectrogram to a stored signal small-region code; a similar small-region spectrogram detection portion which detects a small-region spectrogram similar to the small-region reference signal spectrograms based on a degree of similarity of a code; and a degree of segment similarity calculation portion which uses a degree of small-region similarity and calculates a degree of similarity between the segment of the stored signal and the reference signal.
Owner:NIPPON TELEGRAPH & TELEPHONE CORP
Rapid and sensitive biosensing
InactiveCN101111769AFast detectionImprove contact efficiencyMaterial analysis by electric/magnetic meansContact timeParticle physics
A sensor device (15) for detecting magnetic particles (13) has a binding surface (40) with binding sites thereon and comprises: at least one sensor element (23) for detecting the presence of magnetic particles (13), means for attracting magnetic structures comprising at least one magnetic particle (13) toward and onto the binding surface (40) of the sensor device (15), and means for re-arranging and randomizing the position of individual magnetic particles (13) with respect to the binding sites on the binding surface (40) to give binding sites on all individual particles (13) a substantial probability to have a contact time with binding sites on the binding surface (40). With such sensor device (15), the speed of detection of target molecules in a fluid is enhanced.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Multiple-PCR primer system for quickly testing animal origin ingredients of pigs, sheep and cows and testing method
ActiveCN105177150AShorten detection timeShorten experiment timeMicrobiological testing/measurementDNA/RNA fragmentationBiotechnologyAnimal science
The invention provides a multiple-PCR primer system for quickly testing animal origin ingredients of pigs, sheep and cows and a testing method. The testing method comprises the following steps that the total DNA of a to-be-tested sample is taken as a template, the multiple-PCR primer system composed of a first primer pair, a second primer pair and a third primer pair is utilized to perform a multiple-PCR amplification experiment, and after reacting is completed, a result is judged according to agarose gel electrophoresis; the total DNA template of the sample adopts one or multiple of a pork product, a mutton product and a beef product. According to the multiple-PCR testing method, the authenticity of the pork product, the mutton product and the beef product and whether adulteration exists or not can be quickly and highly specifically tested, the testing efficiency is greatly improved, the time is saved, the testing cost is reduced, and the testing method is particularly suitable for quick anti-counterfeiting authentication of the pork product, the mutton product and the beef product. In addition, the multiple-PCR primer system cooperates with relevant reagents to prepare a kit, use is convenient, and meanwhile possibility of industrial production and application is supplied.
Owner:SHANGHAI ACAD OF AGRI SCI
DC-DC high frequency boost converter
ActiveUS20050242788A1Simplify circuit layoutFast detectionEfficient power electronics conversionDc-dc conversionInductorVoltage reference
Owner:TEXAS INSTR INC
Network control node detection method and system
InactiveCN106603521AWays to improve monitoringFast detectionTransmissionFeature matchingProtocol for Carrying Authentication for Network Access
The invention discloses a network control node detection method and system. The method includes: classifying botnet families and versions based on the botnet families and extended version samples thereof, and obtaining a network control node and common port information thereof through a static configuration decryption method; automatically obtaining a corresponding IP, an IP network segment and port information based on the network control node; and detecting a new network control node through automatic and batch enumeration communication of the IP, a port, and a common port and communication protocol feature matching one by one. According to the method and system, the problem of failure of obtaining more unknown botnet control nodes of the same family in the prior art is solved.
Owner:BEIJING ANTIY NETWORK SAFETY TECH CO LTD
Touch display device integrated on displayer
InactiveCN102646006AImproved position detection capabilitySize limitInput/output processes for data processingDisplay deviceOptoelectronics
The invention discloses a touch display device integrated on a displayer, which comprises a first substrate (1) and a second substrate (2) integrating an electric control unit, wherein the first substrate (1) and the second substrate (2) are oppositely arranged, a red, green and blue (RGB) color layer (3) is arranged on one side of the second substrate (2) facing to the first substrate (1), a faceted transparent electrode layer (4) and a first metal layer (5) and a second metal layer (6) which are arranged in staggered mode are sequentially arranged on one side of the second substrate (2) back on to the first substrate (1), and the first metal layer (5) is located between the faceted transparent electrode layer (4) and the second metal layer (6). The touch display device integrated on the displayer conducts position detection of touch points through the faceted transparent electrode layer and metal electrodes, avoids optical interference caused by patterning of the transparent electrode layer, greatly improves capability of touch point position detection, has the advantages of being fast in detection and low in driving cost, and can achieve production of high-fineness and large-size touch panels.
Owner:NANJING CEC PANDA LCD TECH
Multiplex PCR (polymerase chain reaction) primer system for synchronously detecting five animal-derived ingredients and detection method
PendingCN106148559AShorten detection timeShorten experiment timeMicrobiological testing/measurementDNA/RNA fragmentationMultiplex pcrsBiology
The invention provides a multiplex PCR (polymerase chain reaction) primer system for synchronously detecting five animal-derived ingredients and a detection method. Total DNA (deoxyribonucleic acid) of a sample to be detected is used as a template; a multiplex PCR primer system formed by a primer pair I, a primer pair II, a primer pair III, a primer pair IV and a primer pair V is used for multiplex PCR amplification tests; after the reaction is completed, the results are judged according to agarose gel electrophoresis, wherein the sample total DNA template is one or several of materials in cow, pig, sheep, chicken and duck meat products. When the multiplex PCR primer system provided by the invention is used for detecting the authenticity of the cow, pig, sheep, chicken and duck meat products and the adulteration, the detection speed is high; the specificity is high; the sensitivity is high; the detection efficiency can be greatly improved; the time is saved; in addition, the detection cost is reduced; the multiplex PCR primer system is particularly applicable to the fast anti-counterfeiting identification of cow, pig, sheep, chicken and duck meat products. In addition, the multiplex PCR primer system is matched with relevant reagents and can be made into a kit; the use is convenient; meanwhile, possibility is provided for industrial production and application.
Owner:SHANGHAI ACAD OF AGRI SCI +1
Large view field array detection radar based on light flight time
PendingCN109541631ABig angleProbing angle limitElectromagnetic wave reradiationComputer moduleOptoelectronics
The invention discloses a large view field array detection radar based on light flight time. The radar comprises an illumination module, a sensing module and a control module; the control module is separately connected with the illumination module and the sensing module; the illumination module transmits light rays outwards according to a preset radiation angle; the sensing module receives a reflective light ray signal according to a preset detection angle; the sensing module inputs the reflection light ray signal to the control module; and the control module is used for controlling the driveof the illumination module and the sensing module, and processing the reflection light ray signal. According to the radar provided by the invention, the different space ranges are radiated by a radiation light source, the radiation angles of the light sources are mutually remedied, and uniform illumination is achieved; multiple light flight time sensing chips are connected in series, and multipledepth sensing chips are used for simultaneously sensing scenes, so that the sensing speed of the large view field array detection radar is significantly higher than that of the scanning type laser radar, and the vibration sensitivity and waste of scanning time of the mechanical scanning type detection are avoided; the problems of limitations on the detection angle of the single-sensor system lensand on the multi-line laser radar detection speed are solved.
Owner:HANGZHOU LANXIN TECH CO LTD
Ionosphere non-coherent scatter radar differential phase detection method
InactiveCN105242274AEnhance high-precision and fast detection capabilitiesFast detectionRadio wave reradiation/reflectionICT adaptationElectronic temperatureElectronic density
The invention provides an ionosphere non-coherent scatter radar differential phase detection method, comprising steps of 1 computer simulation and modeling research, 2 non-coherent scatter software radar verification test, 3 non-coherent scatter radar verification test, and 4 optimization and improvement of the radar echo numerical module, the parameter extraction algorithm and the test method according to the computer simulation and practical detection result. The invention can simultaneously and fast obtain the parameters of the high accuracy electronic density of the whole ionosphere height, the electronic temperature, the ion temperature, the plasma drift speed in the direction perpendicular to the magnetic line, etc.
Owner:NANCHANG UNIV
Path MTU discovery method and system facing to IPV6
InactiveCN101552728AShorten the lengthReduce loadData switching networksDistributed computingPath MTU Discovery
The present invention discloses a path MTU discovery method and system facing to IPV6, the method is: transmits messages from source nodes to target nodes through a plurality of intermediate transmitting nodes, and then the target nodes receives the messages and determines the path MTU and notices the source nodes, the intermediate transmitting nodes gets an outgoing interface link according to the received messages and judges length of the messages to be transmitted, and if length of the transmitted messages is larger than MTU value of the outgoing interface link, modifying content of the messages and then transmitting. The invention provided path MTU discovery method facing to IPV6, a source node can obtain path MTU by one detection if no packet is lost, which improving detection speed and reducing messages for detecting and reducing network load.
Owner:BEIJING NORMAL UNIVERSITY
Multiplex PCR method for rapid detection and identification of five Listeria species
InactiveCN102286631AHigh sensitivityStrong specificityMicrobiological testing/measurementMicroorganism based processesForward primerMultiplex
The invention discloses a method for multiplex polymerase chain reaction (PCR) fast detection and five-Listeria-bacterium identification, which comprises the following steps of: 1, firstly selecting five forward primers and one reverse primer; 2, taking positive control standard bacterium liquid and bacterium liquid to be detected for being respectively prepared into genome deoxyribonucleic acid (DNA) templates; 3, respectively adding the forward primers and the reverse primer into the genome DNA templates prepared by the positive control standard bacterium liquid and the genome DNA templates prepared by the bacterium liquid to be detected for carrying out PCR amplification reaction; 4, taking amplified products for carrying out electrophoresis; and 5, judging the results. The method provided by the invention belongs to the fast, accurate and sensitive method for the multiplex PCR detection and the five-Listeria-bacterium identification, and the selection is provided for the identification of the Listeria bacterium by a molecular biological method. The efficiency is improved, the time is saved, and in addition, the detection cost is saved.
Owner:INSPECTION & QUARANTINE TECH CENT OF XIAMEN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
Seabed cold spring echo reflection detection system and sealed cold spring echo reflection detection method
The invention relates to a sealed cold spring echo reflection detection system which comprises the components of an energy transducer array which is composed of a plurality of energy transducers, a cable, a transceiver switch, a transmitter, a receiver, a signal processor, an echo processing server and a power supply module. The energy transducer array is placed underwater and is connected with one side of the transducer switch on water surface through the cable. On the water surface, the other side of the transceiver switch is connected with the transmitter and the receiver. The transmitter and the receiver are connected with the signal processor. The signal processor is connected with the echo processing server. The power supply module supplies electric energy to the whole system.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI