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38results about How to "There is no detection blind zone" patented technology
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Method for screening gene marker of intestinal cancer and/or gastric cancer, gene marker screened by same and application of gene marker
PendingCN106755464AWide variety of sourcesImprove experienceMicrobiological testing/measurementIntestinal CancerGastric carcinoma
The invention relates to a gene marker for detecting intestinal cancer and / or gastric cancer and application of the gene marker. The invention also relates to a method for detecting the intestinal cancer and / or the gastric cancer by using the gene marker.
Owner:北京玄鸟飞讯科技有限公司
Gene marker, kit and detection method for detecting pancreas cancer
InactiveCN107385050AHigh sensitivityImprove featuresMicrobiological testing/measurementCollagen vPancreas
The invention relates to a gene marker, a kit and a detection method for detecting pancreas cancer. The gene marker comprises one or two or more of the following genes: SI, CLEC4C, SNX7, MEOX2, FAT1, FMO3, CFTR, PLPPR3, AFM and COL5A2. The content of 5-hydroxymethylcytosine in the pancreas cancer gene marker is detected through high-throughput sequencing, so as to determine whether the pancreas caner exists. The gene marker for detecting pancreas cancer has the advantages of being safe and noninvasive, having a wide DNA source, being highly accurate, being convenient to operate, and providing good user experience. The gene marker can be combined with other clinical indexes, and provides more accurate determining results for screening, diagnosis, treatment and prognosis of pancreas cancer.
Owner:SHANGHAI EPICAN BIOTECH CO LTD +1
Gene marker used for detecting liver cancer and purpose thereof
PendingCN107164508AHigh sensitivityImprove featuresMicrobiological testing/measurementDNA/RNA fragmentationBiologyLiver cancer
The invention relates to a gene marker used for detecting liver cancer and a purpose thereof. The invention also relates to a method for detecting liver cancer by using the provided gene marker.
Owner:北京玄鸟飞讯科技有限公司
Quick intelligent anti-island system and quick intelligent anti-island method with power grid fault self-recovering capability
ActiveCN105914776AAccurate detectionThere is no detection blind zoneElectrical testingSingle network parallel feeding arrangementsActive phaseIslanding
The invention provides a quick intelligent anti-island system and a quick intelligent anti-island method with power grid fault self-recovering capability. The method comprises the steps of a first step, establishing the main circuit of a distributed power generating grid-connected system; a second step, injecting phase angle fluctuation in the control circuit of the grid-connected system by an active phase deviation module; and a third step, based on the voltage signal of a common connecting point in the grid-connected system and a power grid frequency signal which is obtained by a phase-locked loop, realizing island detection and power grid fault self-recovering, wherein the common connecting point is the accessing position of a grid-connected filter and a local load into the power grid. The quick intelligent anti-island system and the quick intelligent anti-island method can quickly detect the island, and adding of additional hardware such as sensor is not required in the distributed power generating grid-connected system in which the phase-locked ring is used for realizing power grid synchronization. On the extreme condition that the system local load is a parallel RLC load which matches the power of the distributed power generating system, operation state of the island can be quickly and accurately detected. Furthermore no detection blind area exists and system operation efficiency can be effectively improved.
Owner:SHANGHAI JIAO TONG UNIV
Gene marker, kit and method for detecting lung cancer
PendingCN107365845AHigh test acceptanceDNA comes from a wide variety of sourcesMicrobiological testing/measurementProtein translocationSulfatase
The invention relates to a gene marker, kit and method for detecting lung cancer. The gene marker comprises one or more than two of a RUNX1 translocation partner gene 1, F-Box and leucine-rich repeat protein 7, RNcA binding motif single chain interacting protein 3, cadherin 11, erythrocyte membrane protein band 4.1-like protein, basonuclin 2, Tolloid-like protein 1, sulfatase 1, integrin subunit alpha 8 and R-spinal protein 3. The content of 5-hydroxymethyl cytosine in the lung cancer gene marker through high-throughput sequencing so as to judge whether the lung cancer exists or not. The method for detecting the lung cancer is safe, noninvasive, wide in DNA source, high in accuracy, convenient to operate and good in user experience. The gene marker can be combined with other clinical indexes and provides accurate judgements for lung cancer screening, diagnosing, treatment and prognosis.
Owner:SHANGHAI EPICAN BIOTECH CO LTD +1
Self-service express cabinet
PendingCN107492212ARealize self-service deliveryRealize receiptFranking apparatusApparatus for meter-controlled dispensingComputer hardwareLogistics management
The invention relates to the field of logistics equipment, and specifically relates to a self-service express cabinet. The self-service express cabinet includes a cabinet body formed by a plurality of express boxes, and a radar detection system arranged in the cabinet body. The express box includes a box door and an electronic lock arranged on a side of the box door. The radar detection system includes a plurality of probes, a drive circuit, an ultrasonic emission module, an ultrasonic reception module, a signal amplification circuit, a signal decoding circuit, a control module, and an external power supply module. The electronic lock is provided with a probe mounting hole used to mount the probe. Open-close of box doors of the express boxes of the self-service express cabinet is controlled through the radar detection system. When the box door is opened, the radar detection system acquires and records information of existence of express, and size, weight, addressee information and other information in the express box. The self-service express cabinet is safe and convenient, and can realize self-service express sending and receiving, and the ultrasonic probes can detect size of express in the box door without a blind area, and a detection result is accurate.
Owner:潘传华
Microgrid non-destructive island detection method based on harmonic current injection and harmonic impedance measurement
ActiveCN110954763AReduce the amplitudeImprove accuracyElectrical testingVoltage-current phase angleNon destructiveMicrogrid
The invention discloses a microgrid non-destructive island detection method based on harmonic current injection and harmonic impedance measurement. The method comprises the steps of utilizing an FFT algorithm to real-timely measure a harmonic voltage, a harmonic current and a system frequency at a PCC, comparing the harmonic voltage and the system frequency with a preset voltage threshold value and a preset frequency threshold value in real time, and if the harmonic voltage and the system frequency exceed the threshold values, judging as an island state directly; otherwise, utilizing the harmonic voltage and the harmonic current to calculate an equivalent harmonic impedance amplitude and a phase angle, calculating a ratio of the harmonic impedance amplitude to the last harmonic impedance amplitude, judging whether the ratio of the harmonic impedance amplitude is greater than a proportionality coefficient or not, if so, judging whether the impedance phase angle is less than zero or not,and if not, judging as an island. According to the method, the amplitude change and phase change of the harmonic impedance are used as the island detection criteria, so that the island detection accuracy is improved, the island detection can be realized without needing to force the voltage and frequency to exceed the threshold values, and the island detection method is non-destructive.
Owner:TIANJIN UNIV
Gene marker and detection method for detecting benign and malignant liver tumors, and kit
PendingCN107385051ADNA comes from a wide variety of sourcesImprove accuracyMicrobiological testing/measurementTransferrinAntibody
The invention relates to a gene marker and a detection method for detecting benign and malignant liver tumors, and a kit. The gene marker comprises one or two or more of the following genes: FAT1, ESRRG, SOX9, EVC, AXDND1, RELN, TF, TNFRSF11B, PDX1, and ORM2. The content of 5-hydroxymethylcytosine in the liver tumor gene marker is detected through high-throughput sequencing, so as to determine a benign or malignant liver tumor. The gene marker for detecting benign and malignant liver tumors has the advantages of being safe and noninvasive, having a wide DNA source, being highly accurate, being convenient to operate, and providing good user experience. The gene marker can be combined with other clinical indexes, and provides more accurate determining results for following screening, diagnosis, treatment and prognosis of liver tumors.
Owner:SHANGHAI EPICAN BIOTECH CO LTD +1
Direct-current island detection method based on specific frequency bus voltage positive feedback
ActiveCN110376483AGuaranteed uptimeThere is no detection blind zoneCurrent/voltage measurementDc source parallel operationPositive feedbackIslanding
The invention discloses a direct-current island detection method based on specific frequency bus voltage positive feedback. The method mainly comprises three parts including a specific frequency bus voltage component extraction link, a specific frequency disturbance quantity injection link, a direct-current island judgment link; the specific frequency bus voltage component extraction link and thespecific frequency disturbance quantity injection link form a positive feedback mechanism in a power management unit control loop; in a direct-current grid connection mode, due to the control effect of a voltage management unit on a bus, the positive feedback mechanism loses efficacy, and the bus voltage is kept stable; in a direct-current grid island mode, a power management unit enables the busvoltage to generate self-oscillation of a specific frequency under the action of the positive feedback mechanism; and the direct-current island judgment link is used for judging whether a system is inan island mode or not according to the change tendency and the magnitude of a specific frequency bus voltage component. The method can rapidly detect the occurrence of a direct-current island, and can eliminate a detection blind area of a passive island method.
Owner:ZHEJIANG UNIV
Harmonic impedance matrix-based anti-islanding identification method and system of wind power plant
ActiveCN107465206AReduce the impactImprove reliabilityElectrical testingSingle network parallel feeding arrangementsElectric fieldIslanding
The invention relates to a harmonic impedance matrix-based anti-islanding identification method and system of a wind power plant. The island protection of the wind power plant is achieved by acquiring a voltage and a current of a grid-connected point of the wind power plant, analyzing the each harmonic impedance size, calculating a mode value of a harmonic impedance matrix and judging whether an island occurs in the wind power plant. The island is identified according to change of circuit impedance at the grid-connected point before and after disconnection of a power grid, and system impedance is equivalent to impedance of the wind power plant and the impedance of the power grid which are connected in parallel; since a main power grid approximates to an ideal voltage source, the system impedance is small; and after the island occurs, the main power grid is disconnected, the system impedance is equal to impedance of a power station system, the value of the system impedance is generally larger than the impedance during grid connection, so that an island state is identified.
Owner:CHINA ELECTRIC POWER RES INST +2
Evaluation method for coal mine impact danger pressure relief effect
InactiveCN112012797AAccurate pressure relief effectThere is no detection blind zoneMining devicesData processing applicationsStress levelStructural engineering
The invention discloses an evaluation method for a coal mine impact danger pressure relief effect. According to the method, the inversion calculation of the wave velocity of a vibration wave can be carried out through the processing and analysis of a vibration wave signal, and the vibration wave velocity is in direct proportion to the stress level of a coal and rock mass, so that before a pressurerelief measure is carried out on the coal and rock mass, the wave velocity of an area to be subjected to pressure relief is subjected to inversion calculation, then a corresponding pressure relief measure is carried out, and then the wave velocity of the area after pressure relief is subjected to inversion calculation. The pressure relief effect can be evaluated by calculating the wave velocity change coefficient and the change range before and after pressure relief, a pressure relief effect evaluation index D is established, and pressure relief is considered to be valid when the D value is larger than 0.5; when the D value is within the range of 0.25-0.50, the pressure relief effect is weak, and pressure relief needs to be reinforced; and when the D value is smaller than 0.25, the pressure relief is invalid, and the pressure needs to be relieved again. The pressure relief effect of the whole impact dangerous area can be evaluated, no detection blind area exists, and the detection precision is high, so that the pressure relief effect of the whole impact dangerous area can be accurately evaluated.
Owner:兖矿能源集团股份有限公司 +2
Creeper tread quality test device and test method thereof
InactiveCN101614639ADetection speedThe test result is accurateMaterial strength using tensile/compressive forcesProduction lineStress conditions
The invention discloses a creeper tread quality test device, comprising an operation platform, a positioning device, a tension test device, a pressure test device, a traction device and a control device. The positioning device, the tension test device, the pressure test device and the traction device are sequentially arranged on the operation platform in line. The control device is arranged at one side of the operation platform and is connected with the pressure test device, the tension test device, and the traction device by a hydraulic pipeline and an electric pipeline. The invention can test creeper treads block by block, realizes production line style test process, improves test speed, and can simulate the actual stress condition of the creeper treads, thus the test result is precise and comprehensive without detection dead zone.
Owner:ZHEJIANG SANY EQUIP
Gene marker for detecting esophageal cancer and use thereof and detection method
PendingCN108103196AHigh sensitivityImprove featuresMicrobiological testing/measurementPhosphodiesteraseLymphatic Spread
The invention discloses a gene marker for detecting esophageal cancer and a use thereof and a detection method. The gene marker comprises one or more of genes of a phospholipid inositol phosphatase CXdomain containing protein 3, a sulfatase 1, a F-Box and leucine-rich repeat protein 7, a Tolloid-like protein 1, a RNA binding template single-stranded function protein 3, an ADAMTS-like protein 1, phosphodiesterase 10A, a LIM-domain ligase 2, a gamma-aminobutyric acid type A receptor protein in the gamma 3 subfamily and a sequence similar 155 family protein A. The gene marker is used for detecting esophageal cancer. The gene marker is suitable for a more extensive source of DNA samples, the detection is safe and non-invasive, the asymptomatic people have high acceptance to detection, the accuracy is high, the gene marker has high sensitivity and specificity to the early esophageal cancer, the operation is convenient, the user experience is good and the dynamic monitoring of the recurrence and metastasis of esophageal cancer is easy.
Owner:SHANGHAI EPICAN BIOTECH CO LTD +1
Gene marker for detecting liver cancer and purpose thereof
The invention relates to a gene marker for detecting a liver cancer at the aim of a hepatitis B patient, and the purpose thereof. The invention further relates to a method for detecting the liver cancer by using the gene marker.
Owner:SHANGHAI YIBIEN GENE TECH CO LTD +1
Deteriorated insulator prediction method based on lifting wavelet time series method
InactiveCN108732470AImprove detection accuracyApplicable to a wide range of waveletsTesting using optic methodsAlgorithmModel parameters
The invention discloses a deteriorated insulator prediction method based on a lifting wavelet time series method. The deteriorated insulator prediction method comprises the specific steps of: (1) datapreprocessing process; (2) model parameter identification process; (3) model diagnosis and inspection process; 4) and prediction of a low zero-value state of an insulation through combining temperature features of an insulator disc surface and a steel cap for determining a deteriorated insulator. The deteriorated insulator prediction method has an effect of improving the detection accuracy rate of deteriorated insulators.
Owner:湖南湖大华龙电气与信息技术有限公司 +2
Islanding detection method and device for direct-current system
ActiveCN106353614AGuaranteed island detection efficiencyAccurate Protection CriterionElectrical testingCurrent/voltage measurementIslandingTransformer
The invention relates to an islanding detection method and device for a direct-current system. The method comprises steps as follows: first power disturbance is injected into a direct-current micro grid, and suspected islanding is diagnosed when the variation of the grid-connected voltage is detected to be higher than or equal to a first admissible value of a voltage difference absolute value within set time or set times; second power disturbance is injected into the direct-current micro grid, and the fact that islanding occurs to the direct-current system is determined when the variation of the grid-connected voltage is detected to be higher than or equal to a second admissible value of the voltage difference absolute value within set time or set times. Accurate protection criteria are provided for off-network of a direct-current transformer, the islanding detection efficiency of the direct-current system is guaranteed, and a non-detection zone is avoided.
Owner:XUJI GRP +3
Precision seed sowing device work performance on-line detection device based on electrostatic sensor
ActiveCN105758657AOvercome deficienciesAccurate missed broadcastStructural/machines measurementSeed depositing seeder partsSignal conditioningComputer module
The invention discloses a precision seed sowing device work performance on-line detection device based on an electrostatic sensor and the precision seed sowing device work performance on-line detection device belongs to the technical field of agriculture automated machine detection. According to the on-line detection device, N annular metal electrodes which make up a sensor probe are inserted into the inner wall of a seed sowing tube of a precision seed sowing device and are arranged in such a way that the annular metal electrodes are parallel to the vertical direction in which seeds move, and therefore an annular metal electrode array is formed; the annular metal electrode array is connected with a signal conditioning module via a shielding wire cable, and the signal conditioning module is connected with a display module via a signal analyzing module. The signal analyzing module receives output signals of the signal conditioning module, measuring signals are subjected to wave filtering and amplifying operation, the signals are analyzed, and analysis results are display in real time via the display module. The detection device can realize non-contact type on-line detection, seed falling processes can be prevented from interference, an annular sensor is free from blind areas for detection, the detection device is convenient to install and low in price, and the detection device is applicable to precision seed sowing device work performance on-line detection in the technical field of agriculture automated machine detection.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Generator bridging strand brazing ultrasonic detection method
PendingCN111855806ASimple methodThere is no detection blind zoneAnalysing solids using sonic/ultrasonic/infrasonic wavesPulsed UltrasoundEngineering
The invention relates to a generator bridging strand brazing ultrasonic detection method. The technical scheme is that the method further comprises an ultrasonic detector and two ultrasonic longitudinal wave transducers connected with the ultrasonic detector, the transmitting transducer is used for transmitting pulse ultrasonic waves to a detected object, the pulse ultrasonic waves transmitted bythe transmitting transducer penetrate through the detected object and then are received by the receiving transducer, and whether the detected object has defects or not and the severity degree of the defects are judged according to the intensity of received ultrasonic signals. The method is simple, and the acoustic beams are only propagated unidirectionally, so that reduction of sound path attenuation is small, the method has no detection blind area and is suitable for detecting high-attenuation materials. In addition, the shielding effect of defects is not affected by factors such as defect roughness or defect orientation, the method is suitable for detecting the defects in the brazed layer of the bridging strand of the generator of a thermal power plant, and is high in detection speed andaccuracy, thereby being an innovation on the generator bridging strand brazing ultrasonic detection method.
Owner:CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
Image segmentation device for astronomical optical fiber aiming
ActiveCN111796413AThere is no detection blind zoneQuick aimCoupling light guidesTelescopesEngineeringImage segmentation
The invention relates to the technical field of astronomical optical fiber aiming, and in particular relates to an image segmentation device for astronomical optical fiber aiming. The device comprisesa special-shaped micro-lens array and an optical fiber bundle. The special-shaped micro-lens array is composed of a central circular flat plate and a plurality of fan-shaped micro-lenses around the central circular flat plate. According to the invention, the special-shaped micro-lens array with the circular flat plate structure at the center and a plurality of fan-shaped micro-lenses at the periphery is adopted, 100% coverage of light field energy is realized without changing the incident light focal ratio of the scientific main optical fiber, i.e., light deviating from the scientific main optical fiber is coupled into the side optical fiber by the fan-shaped micro-lenses, and a detection blind area does not exist.
Owner:HARBIN ENG UNIV
A Microgrid Islanding Detection Method
InactiveCN102841279BStrong low voltage ride through abilityImprove voltage qualityElectrical testingReactive power adjustment/elimination/compensationElectric power systemIsland state
Owner:TIANJIN UNIV
Direct-current microgrid island detection method based on MPPT trapezoidal voltage disturbance
ActiveCN111864795AThere is no detection blind zoneLittle impact on power qualityPhotovoltaic monitoringPV power plantsMicrogridIslanding
The invention discloses a DC (direct-current) microgrid island detection method based on MPPT trapezoidal voltage disturbance. The method comprises the following steps: starting an MPPT strategy; setting a starting signal threshold value of disturbance; measuring an output current value when PVA operates at the maximum power, calculating the same environment coefficients of PVA with different capacities under the same illumination intensity and temperature in real time, and when the environment coefficients are greater than a set disturbance starting signal threshold value, controlling to carry out periodic trapezoidal disturbance on a PVA port voltage reference value; when it is detected that the PCC voltage value Upcc exceeds a threshold value set through a passive method, judging that an island exists, and otherwise, judging whether the change rule of the Upcc is consistent with the change rule of the calculated value Upccp of the PCC voltage under trapezoidal disturbance or not; and if so, determining that the island exists, otherwise, determining that the island is a pseudo-island. Active and passive modes are combined to carry out direct-current island detection and are matched with each other, so that no detection blind area exists.
Owner:TIANJIN UNIV
A wind farm anti-islanding identification method and system based on harmonic impedance matrix
ActiveCN107465206BGood effectTo achieve the purpose of protectionElectrical testingSingle network parallel feeding arrangementsPower stationIslanding
The invention relates to a wind farm anti-islanding identification method and system based on a harmonic impedance matrix. By collecting the voltage and current of the grid-connected point of the wind farm, analyzing the magnitude of each harmonic impedance, calculating the harmonic impedance matrix modulus, and judging wind power Whether there is an island in the wind farm, so as to realize the island protection of the wind farm. Islanding is identified by using the change of circuit impedance at the grid-connected point before and after the grid is disconnected. Under grid-connected conditions, the system impedance is equivalent to the parallel connection of wind farm impedance and grid impedance. Since the main grid is close to an ideal voltage source, the system impedance is very small. After the island occurs, the main grid circuit is disconnected, and the system impedance is equal to the power station system impedance, and its value is generally much greater than the impedance when connected to the grid, so that the island state can be identified.
Owner:CHINA ELECTRIC POWER RES INST +2
Wall-climbing robot based on mooring helium balloon and using method
PendingCN112505149AImprove detection efficiencyReduce the risk of working at heightsAnalysing solids using sonic/ultrasonic/infrasonic wavesBalloon aircraftsMarine engineeringStructural engineering
The invention discloses a wall-climbing robot based on a mooring helium balloon and a using method thereof. The wall-climbing robot comprises a mechanical platform, a high-pressure fan, and detectionequipment. The upper end of the mechanical platform is connected with a helium balloon, the lower end of the mechanical platform is connected with a mooring part, and the mooring part can adjust the height position of the helium balloon; the helium balloon can drive the mechanical platform to move up and down in the vertical direction; the high-pressure fan is arranged on the side face of one sideof the mechanical platform, and the high-pressure fan can drive the mechanical platform to move left and right in the horizontal direction; and the detection equipment is installed on the side face of the other side of the mechanical platform, and the detection equipment can detect the defects of the building outer wall veneer. The wall-climbing robot has the advantages of low aerial work risk, wide application range, no detection blind area, convenience and flexibility in operation, high detection efficiency and the like.
Owner:SHANGHAI RES INST OF BUILDING SCI CO LTD
Passive UAV positioning method and server
ActiveCN110658494BImprove adaptabilityHigh positioning accuracyPosition fixationSatellite radio beaconingFrequency spectrumFrequency conversion
An embodiment of the present invention provides a passive UAV positioning method and server, the method includes: receiving spectrum information sent by at least 4 radio detectors; the spectrum information is sent by the radio detector based on the received UAV The communication signal is obtained by time-frequency conversion; based on the spectrum information, determine the time difference between the two radio detectors receiving the same communication signal sent by the UAV; The time difference of the same communication signal sent by the UAV is determined to determine the three-dimensional position information of the UAV. In this way, the detection and positioning of passive drones can be realized, without electromagnetic pollution to the environment, high positioning accuracy, no detection blind spots, and high environmental adaptability, which can be used in complex electromagnetic environments in cities.
Owner:理工全盛(北京)科技有限公司
Creeper tread quality test device and test method thereof
InactiveCN101614639BDetection speedThe test result is accurateMaterial strength using tensile/compressive forcesProduction lineStress conditions
The invention discloses a creeper tread quality test device, comprising an operation platform, a positioning device, a tension test device, a pressure test device, a traction device and a control device. The positioning device, the tension test device, the pressure test device and the traction device are sequentially arranged on the operation platform in line. The control device is arranged at one side of the operation platform and is connected with the pressure test device, the tension test device, and the traction device by a hydraulic pipeline and an electric pipeline. The invention can test creeper treads block by block, realizes production line style test process, improves test speed, and can simulate the actual stress condition of the creeper treads, thus the test result is precise and comprehensive without detection dead zone.
Owner:ZHEJIANG SANY EQUIP
Fast and intelligent anti-islanding system and method with power grid fault self-healing ability
ActiveCN105914776BAccurate detectionThere is no detection blind zoneElectrical testingSingle network parallel feeding arrangementsSelf-healingGrid fault
The invention provides a quick intelligent anti-island system and a quick intelligent anti-island method with power grid fault self-recovering capability. The method comprises the steps of a first step, establishing the main circuit of a distributed power generating grid-connected system; a second step, injecting phase angle fluctuation in the control circuit of the grid-connected system by an active phase deviation module; and a third step, based on the voltage signal of a common connecting point in the grid-connected system and a power grid frequency signal which is obtained by a phase-locked loop, realizing island detection and power grid fault self-recovering, wherein the common connecting point is the accessing position of a grid-connected filter and a local load into the power grid. The quick intelligent anti-island system and the quick intelligent anti-island method can quickly detect the island, and adding of additional hardware such as sensor is not required in the distributed power generating grid-connected system in which the phase-locked ring is used for realizing power grid synchronization. On the extreme condition that the system local load is a parallel RLC load which matches the power of the distributed power generating system, operation state of the island can be quickly and accurately detected. Furthermore no detection blind area exists and system operation efficiency can be effectively improved.
Owner:SHANGHAI JIAOTONG UNIV
DC microgrid island detection method based on mppt trapezoidal voltage disturbance
ActiveCN111864795BThere is no detection blind zoneLittle impact on power qualityPhotovoltaic monitoringPV power plantsMicrogridIslanding
Owner:TIANJIN UNIV
On-line detection device for working performance of precision seed meter based on electrostatic sensor
ActiveCN105758657BOvercome deficienciesAccurate missed broadcastStructural/machines measurementSeed depositing seeder partsWork performanceSignal conditioning
The invention discloses a precision seed sowing device work performance on-line detection device based on an electrostatic sensor and the precision seed sowing device work performance on-line detection device belongs to the technical field of agriculture automated machine detection. According to the on-line detection device, N annular metal electrodes which make up a sensor probe are inserted into the inner wall of a seed sowing tube of a precision seed sowing device and are arranged in such a way that the annular metal electrodes are parallel to the vertical direction in which seeds move, and therefore an annular metal electrode array is formed; the annular metal electrode array is connected with a signal conditioning module via a shielding wire cable, and the signal conditioning module is connected with a display module via a signal analyzing module. The signal analyzing module receives output signals of the signal conditioning module, measuring signals are subjected to wave filtering and amplifying operation, the signals are analyzed, and analysis results are display in real time via the display module. The detection device can realize non-contact type on-line detection, seed falling processes can be prevented from interference, an annular sensor is free from blind areas for detection, the detection device is convenient to install and low in price, and the detection device is applicable to precision seed sowing device work performance on-line detection in the technical field of agriculture automated machine detection.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Sweeper and its obstacle avoidance method
ActiveCN111802967BImprove reliabilityImprove detection accuracyAutomatic obstacle detectionTravelling automatic controlCapacitanceBlind spot
The embodiment of the present application provides a sweeping machine and an obstacle avoidance method for the sweeping machine. The sweeping machine includes a sweeping machine body, a pole plate and a control device; the pole plate is arranged on the side wall of the sweeper body, and the pole plate generates an electromagnetic field when it is in operation The control device is electrically connected to the pole plate, and is used to obtain the capacitance of the pole plate according to the change of the electromagnetic field of the pole plate, and determine whether there is an obstacle in the environment area corresponding to the pole plate according to the capacitance of the pole plate. The sweeping machine of the embodiment of the present application uses the pole plate that generates an electromagnetic field to detect obstacles, so it is not affected by the surrounding environment and light factors, and can also avoid the interference of signals sent by other sensors, which improves the accuracy of obstacle detection Spend. And because the pole plate is arranged on the side wall of the sweeper body, the electromagnetic field generated by the pole plate will not be interfered by the sweeper itself, and can be completely used to detect obstacles, thereby ensuring that there is no detection blind spot in the detection process, and improving the sweeper. reliability.
Owner:MIDEA ROBOZONE TECH CO LTD
Gene markers for detecting liver cancer and uses thereof
ActiveCN107142320BHigh sensitivityImprove featuresMicrobiological testing/measurementOncologyLiver cancer
The invention relates to a gene marker for detecting liver cancer and its application for hepatitis B patients. The present invention also relates to a method for detecting liver cancer using the gene marker.
Owner:北京玄鸟飞讯科技有限公司
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