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57 results about "Precipitation measurement" patented technology
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Miniature radio-acoustic sounding system for low altitude wind and precipitation measurements
InactiveUS6856273B1Improve accuracyRainfall/precipitation gaugesVolume/mass flow measurementTransceiverLength wave
The present invention is directed to a radio-acoustic sounding system for providing wind measurements at altitudes of 100 meters or less. Wind measurements are obtained by transmitting a pulse of audio frequency energy through one or more volumes corresponding to the coverage area of one or more radio frequency transceivers. The frequency of the audio pulse is selected to have a wavelength that is one-half the wavelength of the electromagnetic energy transmitted by the antenna or antennas. By monitoring a return radio frequency signal at selected times following the transmission of the audio pulse, wind data is obtained at selected altitudes. Wind speed and direction can be obtained by observing the Doppler frequency shift of return radio frequency signals, or by observing the amplitude of the return radio frequency signals. In accordance with an embodiment of the present invention, precipitation measurements may be made by transmitting a radio frequency signal at the same radio frequency as is used in connection with wind measurements, and observing return radio frequency signals.
Owner:BOGNAR JOHN A
X-band dual-polarization weather radar quantitative precipitation measurement method and system
ActiveCN110488393AQuantitative measurement is accurateRainfall/precipitation gaugesRadio wave reradiation/reflectionUltrasound attenuationWeather radar
An embodiment of the invention provides an X-band dual-polarization weather radar quantitative precipitation measurement method and an X-band dual-polarization weather radar quantitative precipitationmeasurement system. The X-band dual-polarization weather radar quantitative precipitation measurement method comprises the steps of: utilizing an X-band dual-polarization radar to obtain radar data in a detection range, and using a laser raindrop spectrograph to obtain an actually measured raindrop spectrum of a detection point; acquiring a radar reflectivity factor and an attenuation rate; acquiring an actually measured rainfall rate and a radar reflectivity factor true value of the detection point based on the actually measured raindrop spectrum, acquiring an attenuation rate true value ofthe detection point through T matrix scattering simulation, acquiring a rainfall function in the detection range through fitting the actually measured rainfall rate and the attenuation rate true value, and further acquiring a rainfall rate; inverting the rainfall rate by using the attenuation rate if the radar reflectivity factor is greater than a first set threshold value; and acquiring an attenuation rate function in the detection range through fitting the radar reflectivity factor true value and the attenuation rate true value is the radar reflectivity factor is not greater than the first set threshold value, and then acquiring a rainfall rate in the detection range based on the attenuation rate function. The X-band dual-polarization weather radar quantitative precipitation measurementmethod and the X-band dual-polarization weather radar quantitative precipitation measurement system can acquire more precise predicted rainfall rates.
Owner:INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
Multi-band microwave link-combined regional precipitation measurement method
ActiveCN106547036AImprove inversion accuracyMake up resolutionRainfall/precipitation gaugesRadio wave reradiation/reflectionMulti bandUltrasound attenuation
The invention discloses a multi-band microwave link-combined regional precipitation measurement method. The method includes the following steps that: data acquisition devices are installed on each microwave link transmitting and receiving base station, and the signal level values RSL of the microwave transmitting and receiving ends are collected and transmitted to a central server in real time, and the path attenuation value of each microwave link is obtained through calculation according to point-to-point microwave links; the central server stores the signal level values RSL sent by each base station in the form of FTP files, carries out matching according to the point-to-point microwave links, and establishes a topological structure of multi-band microwave links based on the geographical positions of the microwave link transmitting and receiving base stations; and two-dimensional grids are established according to the topological structure, and links in each grid are marked. The method has the advantages of wide coverage, low hardware costs and the like. With the method adopted, deficiencies of an existing meteorological observation station network in observation resolution and coverage can be made up.
Owner:PLA UNIV OF SCI & TECH
Mountainous precipitation measurement and calculation method suitable for south-eastern Tibetan plateau area and application
InactiveCN105930420AThe principle of the method is reliableReliable principleGeographical information databasesComplex mathematical operationsAtmospheric sciencesPlateau
The invention discloses a mountainous precipitation measurement and calculation method suitable for a south-eastern Tibetan plateau area and an application. The mountainous precipitation measurement and calculation method comprises the steps of firstly obtaining the altitude, slope aspect and gradient of a mountainous area to be subjected to precipitation measurement and calculation; secondly determining a subarea in which the mountainous area to be subjected to the precipitation measurement and calculation is located according to a geographic position of the mountainous area to be subjected to the precipitation measurement and calculation; and finally performing calculation by applying a precipitation vertical distribution relational expression of the subarea to obtain a precipitation amount of the mountainous area to be subjected to the precipitation measurement and calculation. The method is reliable in principle and scientific, simple and convenient in calculation process, can be universally suitable for obtaining precipitation data of a high-altitude area lack of meteorological stations in the south-eastern Tibetan plateau area, and has important reference values for precipitation estimation and flow concentration calculation of mountainous hazard forming areas of debris flow and the like.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Precipitation measurement method and device based on image identification
PendingCN109143413AImprove authorityEasy to use and maintainRainfall/precipitation gaugesMorphological filteringMorphological filter
The application relates to a precipitation measurement method and device based on image identification. The method includes the following steps: a, acquiring a raindrop image through a camera device;b, filtering the raindrop image by a morphological filtering algorithm, identifying the edge of raindrop, and obtaining a raindrop target area in the raindrop image; and c, calculating the area of raindrop in the raindrop target area, estimating the amount of raindrop water according to the area of raindrop, and estimating the precipitation according to the amount of raindrop water. Precipitationis measured by image identification, and the measurement accuracy of precipitation can reach 0.1mm. Moreover, there is no mechanical action in the measurement process, which is conducive to maintenance and use. The reliability and the authority of meteorological forecast are improved.
Owner:深圳市银河系科技有限公司
Apparatus and method for calibrating and validating micro rain radar
InactiveUS20180106887A1Securing reliabilitySecuring accuracyRainfall/precipitation gaugesRadio wave reradiation/reflectionWind systemEngineering
Disclosed is an apparatus for calibrating and validating an MRR, the apparatus including a correlation calculation unit configured to determine a correlation between a precipitation strength value and a precipitation measurement value, a regression equation calculation unit configured to calculate a regression equation for the precipitation strength value and to calculate a result value of the regression equation, an optimum accumulation time determination unit configured to determine an optimum accumulation time based on the correlation and the result value, a rain cloud vertical sampling unit configured to sample a rain cloud example, a vertical reflectance comparison unit configured to compare a calibrated MRR at a shortest range distance with a vertical reflectance according to a wind system, and a radar constant correction unit configured to correct a constant of an MRR based on the optimum value or the sampling and a result value of the comparison.
Owner:KOREA METEOROLOGICAL ADMINISTRATION
Automatic precipitation measurement device and measurement method
ActiveCN103336318ASimple and straightforward way to measure precipitationMeet the requirements for measuring 300mm precipitationRainfall/precipitation gaugesICT adaptationElectrical resistance and conductanceEngineering
The invention relates to an automatic precipitation measurement device and a measurement method. The automatic precipitation measurement device comprises an L-shaped precipitation determination sensor formed by an L-shaped insulation board and a plurality of determination contacts Ai arranged on the L-shaped insulation board and a monitoring unit, wherein one ends of the determination contacts Ai are communicated with a power source anode V+ through resistors R, the other ends of the determination contacts Ai are connected with nodes Ji to be determined on the monitoring unit, the monitoring unit is connected with a power source cathode or a determination end point C through controlling the nodes Ji to be determined, whether equipment is at fault is determined according to voltage magnitude of the determination end point C, whether rainfall occurs is detected, and precipitation data is detected. According to the automatic precipitation measurement device and the measurement method, whether the rainfall occurs can be detected timely, a precipitation detection mode is simple, once the equipment is at fault, alarm information can be emitted instantly, so problems that whether the rainfall occurs can not be detected and the precipitation detection mode is complex existing in the prior art are effectively settled.
Owner:北京博研智通科技有限公司
Weighing rain gauge structure suitable for measuring freezing rain precipitation
InactiveCN105204095AImprove accuracyReliable scientific dataRainfall/precipitation gaugesEngineeringLoad cell
The invention provides a weighting rain gauge structure suitable for measuring freezing rain precipitation. The weighting rain gauge structure comprises a housing and an inner barrel, an inner barrel bracket, a freezing rain collection disc, a precipitation collection barrel, a precipitation collection barrel weighting sensor and a total weighting sensor which are arranged in the housing, wherein the housing and the inner barrel are movably connected at the top ends to form a water receiving opening; the precipitation collection barrel is arranged on the precipitation collection barrel weighting sensor; the outlet of the inner barrel is positioned right above the precipitation collection barrel; the precipitation collection barrel weighting sensor is arranged on the total weighting sensor; the inner barrel is also arranged on the total weighting sensor through the inner barrel bracket; the freezing rain collection disc is disc-shaped, arranged in the inner barrel and positioned under the water receiving opening and the diameter of the freezing rain collection disc is greater than that of the water receiving opening. The weighting rain gauge structure provided by the invention can obviously improve freezing rain precipitation measurement accuracy and provide reliable scientific data for scientific research on the disaster of freezing rain.
Owner:INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
Thermal plate precipitation measurement system
A thermal plate precipitation measurement system (300) and a method of operating the thermal plate precipitation measurement system (300) is provided. The thermal plate precipitation measurement system (300) includes a first thermal plate system (301A) with first and second thermal plates (302A, 303A) and a second thermal plate system (301B) with first and second thermal plates (302B, 303B). A precipitation rate can be determined by configuring the first and second thermal plates (302A, 303A) of the first thermal plate system (301A) at a first temperature and configuring the first and second thermal plates (302B, 303B) of the second thermal plate system (301B) at a second temperature different than the first temperature. A differential power consumption between the first and second thermal plates (302A, 303A, 302B, 303B) of each of the first and second thermal plate systems (301A, 301B) can be determined and the precipitation rate can be determined based on a difference between the differential power consumption of the first thermal plate system (301A) and the differential power consumption of the second thermal plate system (301B).
Owner:BOARD OF RGT NEVADA SYST OF HIGHER EDUCATION ON BEHALF OF THE DESERT RES INST +1
Precipitation measurement method and device
PendingUS20220244426A1Unwanted contributionRainfall/precipitation gaugesWeather condition predictionTimestampEngineering
A method for measuring precipitation comprises: acquiring, from at least one coordinate (x,y,z) acquisition site PA, at least one radio signal transmitted from at least one radiofrequency transmission source and periodically measuring the power P(t) of a component of the received signal in order to create series of time-stamped levels (P(t),t) processing, on at least one sliding temporal window, N values of at least one time-stamped series (P(t),t), which includes, on the one hand, determining the type of hydrometeors that are in play (rain, hail, snow, etc.) and determining a reference level for the signal corresponding to the power of the signal that would be received from the transmitter in the absence of hydrometeors and denoted (Pref(t),t) and calculating a sequence of rainfall attenuations (or due to other hydrometeors) (ΔP(t),t) according to: ΔP(t)=P(t)−Pref(t). An acquisition device is used for implementing the method.
Owner:HD RAIN
Quantitative rainfall estimation method based on Hurdle-IMDL framework
ActiveCN120972290AWeather condition predictionNeural learning methodsQuantitative precipitation estimationRainfall estimation
The invention discloses a quantitative rainfall estimation method based on a Hurdle-IMDL framework. The method comprises the following steps: acquiring historical rainfall measurement data and meteorological satellite observation data; constructing a biased quantitative rainfall estimation probability model based on a Hurdle model, correcting a biased rainfall estimation probability sub-model according to an IMDL method, substituting into empirical distribution to construct an empirical quantitative rainfall estimation probability model, and deriving a negative logarithm likelihood function of the empirical quantitative rainfall estimation probability model; constructing an AI model, and optimizing the AI model by taking a negative log-likelihood function as a loss function; and inputting meteorological satellite observation data of a to-be-inverted region into the trained AI model to obtain an estimated value of a parameter of the empirical quantitative precipitation estimation probability model, and estimating the precipitation according to conditional expectation. According to the invention, the Hurdle model is used to solve the zero expansion problem, the IMDL learning method is used to cope with the long tail problem, and the inversion accuracy of extreme rainfall is improved.
Owner:NANJING METEOROLOGICAL SCI & TECH INNOVATION RES INST
Method for classifying precipitation types by using K-nearest neighbor algorithm
InactiveCN110059766AAccurate divisionGood estimateCharacter and pattern recognitionGround based radarData set
The invention relates to the field of weather and hydrology and classification of precipitation types, in particular to a method for classifying precipitation types by using a K-nearest neighbor algorithm, which comprises the following steps: 1) selecting a training data set, 2) selecting a verification sample, and 3) calculating the distance between the verification sample and each training sample in the training data set; 4) selecting K values, classification types of K samples closest to the verification samples in the training data set, and the classification types as the classification types of the verification samples; 5) selecting different K values to calculate and compare, and determining a post-optimal K value, and 6) selecting a real-time sample, calculating and comparing by using the determined optimal K value, and determining the classification type of the real-time sample. The precipitation types are classified by using the ground-based radar data and the tropical precipitation measurement satellite TRMM satellite rainfall type product data on the basis of the K-nearest neighbor algorithm, the precipitation types are quickly and accurately divided on an existing service platform, and the estimation of the precipitation amount is improved.
Owner:LANZHOU UNIVERSITY
Multi-source rainfall measurement product data fusion method, system, equipment and medium
The invention discloses a multi-source rainfall measurement product data fusion method, system and device and a medium, and belongs to the technical field of meteorological data processing, and the method comprises the steps: obtaining meteorological satellite rainfall measurement data, weather radar rainfall measurement data and ground rain gauge rainfall measurement data, and constructing a multi-source rainfall data set; performing preprocessing through the multi-source rainfall data set to obtain satellite rainfall data with a unified coordinate system and resolution, radar rainfall data after noise reduction and rainfall gauge rainfall data after interpolation completion; and in combination with the preprocessed multi-source rainfall data, constructing a time-space consistency data set. According to the method, meteorological satellite, radar and rain gauge data are integrated, a multi-source rainfall data set is constructed, a coordinate system and resolution are unified, noise reduction interpolation ensures time-space consistency, a Kriging interpolation method is adopted to fuse data, resolution and accuracy are improved, an evaluation model is subjected to cross validation, and accurate support is provided for weather forecast and disaster prevention and reduction.
Owner:NANJING HEHAI NANZI HYDROPOWER AUTOMATION
Precipitation measurement and calculation device for frozen soil region observation
ActiveCN112213798AEasy to assemble and disassembleEasy to take outRainfall/precipitation gaugesStationary filtering element filtersSoil scienceGraduated cylinder
The invention belongs to the technical field of precipitation measurement and calculation equipment, and particularly relates to a precipitation measurement and calculation device for frozen soil region observation. The device comprises a base, an outer cylinder is arranged on the base, support columns are fixed at four corners of the bottom of the outer cylinder, the bottoms of the support columns are fixedly connected with the top of the base, and support plates are symmetrically fixed to the top of the base. By arranging the support plates, the two-way lead screw, the rotary knob, the vertical plate, the transverse rod, the clamping plate and the anti-skid rubber pad, the measuring cylinder can be disassembled and assembled more conveniently, and after rainwater is collected, the measuring cylinder can be taken out more conveniently, so that people can observe the precipitation amount conveniently; and by arranging the supporting plate, the inserting block, the triangular block, thefixing block, the guide rod, the sliding plate, a first spring, a trapezoidal block, a connecting rod, a circular ring and a pressing plate, a rain containing funnel can be conveniently disassembledand assembled, so that when needing to be carried, the rain containing funnel can be disassembled from the outer barrel, the height can be reduced, and people can conveniently carry the rain containing funnel.
Owner:秦皇岛市气象局
Rainfall monitoring device for wetland ecosystem
PendingCN114814994AEasy to measureAccurate measurementRainfall/precipitation gaugesCleaning using toolsEngineeringAtmospheric sciences
The invention provides a rainfall monitoring device for a wetland ecosystem, and belongs to the field of rainfall monitoring, the rainfall monitoring device for the wetland ecosystem comprises an optical rain gauge body, an adjusting support mechanism and an outer cover cleaning mechanism, the adjusting and supporting mechanism comprises a first supporting table, a first adjusting bolt, a second supporting table, a second adjusting bolt, a connecting block, supports, supporting legs and a third adjusting bolt, the optical rain gauge body is arranged on the upper side of the first supporting table, and the multiple supports are evenly distributed on the periphery of the lower side of the second supporting table; the supporting legs are arranged on the support, a through groove is formed in the support, the supporting legs and the through groove are correspondingly arranged, the outer cover cleaning mechanism comprises a mechanical arm and a cleaning assembly, the cleaning assembly is arranged at the upper end of the mechanical arm, the optical rain gauge is convenient to arrange, use and recycle, and the precipitation measuring speed and the working efficiency are improved.
Owner:SHENZHEN INVESTIGATION & RES INST +1
Thermal plate precipitation measurement system
A thermal plate precipitation measurement system (300) and a method of operating the thermal plate precipitation measurement system (300) is provided. The thermal plate precipitation measurement system (300) includes a first thermal plate system (301A) with first and second thermal plates (302A, 303A) and a second thermal plate system (301B) with first and second thermal plates (302B, 303B). A precipitation rate can be determined by configuring the first and second thermal plates (302A, 303A) of the first thermal plate system (301A) at a first temperature and configuring the first and second thermal plates (302B, 303B) of the second thermal plate system (301B) at a second temperature different than the first temperature. A differential power consumption between the first and second thermal plates (302A, 303A, 302B, 303B) of each of the first and second thermal plate systems (301A, 301B) can be determined and the precipitation rate can be determined based on a difference between the differential power consumption of the first thermal plate system (301A) and the differential power consumption of the second thermal plate system (301B).
Owner:BOARD OF RGT NEVADA SYST OF HIGHER EDUCATION ON BEHALF OF THE DESERT RES INST +1
Deep and far sea resistance-type precipitation measuring device and method based on satellite communication positioning
ActiveCN113031115AReal-time measurementAdaptable to sea conditionsRainfall/precipitation gaugesICT adaptationEngineeringWater storage
The invention discloses a deep and far sea resistance-type precipitation measuring device and method based on satellite communication positioning. The measuring device comprises a sea surface floating carrier, a global positioning module, a satellite communication module, a resistance-type precipitation measuring module, a working anchor lamp, a lithium battery pack and a working switch, wherein the resistance-type precipitation measuring module comprises a stainless steel cylindrical shell, an air temperature measuring probe, and a stainless steel filter screen, a water bearing device, a collecting funnel, an electric heating module, a resistance water level probe, a closed water storage container, a drainage pipe, a drainage pump, a posture correction module, a data operation transmission module, a control module and a water temperature measuring probe which are positioned in the stainless steel cylindrical shell. The measuring method comprises the steps of measuring device positioning, rainfall collection, attitude correction, rainfall measurement, rainfall intensity measurement, precipitation and latitude and longitude data transmission, and data receiving, storage and display. The measuring device can be distributed in any sea area globally, can measure all-weather and all-day rainfall and rainfall intensity data of deep and far sea in a global range in real time, and has the characteristics of high sea condition adaptability, wide measuring range, simple and convenient process and the like.
Owner:NAT CENT OF OCEAN STANDARDS & METROLOGY
Real-time positioning monitoring equipment and monitoring method for preventing and controlling water and soil loss
The invention discloses real-time positioning monitoring equipment and a monitoring method for preventing and controlling water and soil loss, and relates to the technical field of water and soil loss. The device comprises a monitoring rod, a precipitation measuring instrument, a monitoring box, a data collector, a level bubble, a monitor, a movable block, a supporting rod, a telescopic supporting leg and a solar device. A slide way and a displacement sensor are arranged in the monitoring box, are connected with the T-shaped slide groove through a measuring slide block and are used for accurately measuring the water and soil loss amount. The precipitation measuring instrument adopts a tipping bucket structure and automatically records precipitation. The angle of the supporting rod can be adjusted, the length of the telescopic supporting leg can be adjusted, and the monitoring rod is vertically fixed. The monitoring method comprises the steps that the monitoring rod is inserted into soil, the supporting rod and the telescopic supporting legs are adjusted to enable the monitoring rod to be perpendicular, soil height and orientation changes are monitored in real time through the displacement sensor and the positioning mechanism, and data are automatically transmitted to the data collector. The solar equipment supplies power to the system. The system has the characteristics of intelligence, simplicity and convenience in operation, high practicability and the like.
Owner:NANJING FORESTRY UNIV
Radar precipitation measurement method and device based on 45-degree slant de-polarization ratio
ActiveCN121613460BRealize quantitative inversionImprove adaptabilityRadio wave reradiation/reflectionICT adaptationNerve networkAtmospheric sciences
The application provides a radar precipitation measurement method and device based on a 45-degree slant depolarization ratio, which uses a radar with or modified to realize 45-degree slant polarization to collect single-shot double-receiving two-channel complex voltage data, calculates a slant baseline linear depolarization ratio and a reflectivity factor Z; identifies a melting layer according to a vertical pointing profile observation collected by the radar in a vertical pointing mode, and applies upper and lower boundaries of the melting layer to a near-horizontal scanning mode to realize liquid rainfall identification; performs rain attenuation correction on and Z, and according to the rain attenuation corrected and Z, looks up a table or a neural network to inverse precipitation parameters such as rainfall intensity, mass-weighted mean diameter, normalized intercept, number concentration and water content. The application improves the precision and robustness of precipitation measurement.
Owner:NANJING UNIV
Foam characteristic comprehensive measurement device in thermal radiation environment
PendingCN121049080ANuclear energy generationMaterial heat developmentThermal insulationHeat stability
The invention belongs to the technical field of foam performance testing, and relates to a comprehensive measurement device for foam characteristics in a thermal radiation environment, comprising: a container for holding a sample, the container being made of a transparent material; the image observation module is arranged on one side of the container, and the shooting end of the image observation module faces the container; the heating module is used for heating the sample in the container, and the heating module is used for acquiring heating data; the foam weighing module is used for weighing the mass of the foam sample in the container and acquiring mass change data of the foam sample; and the foam precipitation liquid in the container flows into the precipitation liquid measuring module through the guide pipe, and the precipitation liquid measuring module is used for acquiring the mass of the precipitation liquid in real time. The device can simulate the flame radiation environment, comprehensively measure and analyze the foam form change, the drainage behavior (liquid content and liquid evaporation capacity), the heat insulation property, the heat stability and other properties of foam, and provide powerful support for research and development and performance evaluation of a fire extinguishing agent.
Owner:CHINA UNIV OF MINING & TECH +1
Precipitation measurement method and device based on dual-polarization information
ActiveCN111751826AReduce volumeHigh sensitivityRadio wave reradiation/reflectionAtmospheric sciencesPrecipitationshed
The invention provides a precipitation measurement method and device based on dual-polarization information, and the method comprises the steps: transmitting orthogonal electromagnetic waves to a precipitation region through a dual-polarization radar sensor, and receiving an echo signal containing dual-polarization information; calculating echo signal power and power spectrum distribution of precipitation particles, and classifying precipitation through the acquired dual-polarization information; when the dual-polarized radar sensor points to the sky in a vertical or non-vertical range, calculating the rainfall intensity; and carrying out time integration on the precipitation intensity to obtain precipitation. The volume of the sensor is reduced, precipitation is classified by using dual-polarization information while precipitation measurement is performed, the sensitivity and the time resolution are high, the sensor does not need to keep vertically pointing to the sky, and the wind resistance is high.
Owner:PEKING UNIV
Tipping Bucket Precipitation Meter for Snow Season
InactiveCN104597527BEfficient measurementLow costRainfall/precipitation gaugesElectricityMeasuring instrument
Disclosed is a tipping bucket type rainfall precipitation measuring instrument used in a snow season. The tipping bucket type rainfall precipitation measuring instrument used in the snow season is mainly characterized in that a heater is arranged on a shell of a tipping bucket type rainfall precipitation metering cylinder, the heater is electrically connected with a temperature controller which is electrically connected with an electric controller, and a snow touch probe which is electrically connected with the electric controller, and a temperature measuring probe which is electrically connected with the temperature controller are fixedly connected to the shell of the tipping bucket type rainfall precipitation metering cylinder through the heater. The tipping bucket type rainfall precipitation measuring instrument used in the snow season has the advantages of being low in cost and accurate in measurement, and easy to install and convenient to use, and being capable of being used in snowfall regions. When the tipping bucket type rainfall precipitation measuring instrument used in the snow season is used in places in the snow season, the rainfall precipitation can be effectively and normally measured after snow falls and the soil gets frozen, the value of the rainfall precipitation can be directly read, measurement is accurate, and use is convenient; the labor intensity of staff who measure the rainfall precipitation and work in weather units and hydrology units in measured areas can be reduced, and manpower and financial resources are saved.
Owner:荣晓明 +1
Snow blowing event classification method and system based on Gaussian kernel probability distribution, electronic equipment and readable storage medium
ActiveCN120011932AData processing applicationsComplex mathematical operationsAtmospheric sciencesWater equivalent
The invention provides a snow blowing event classification method and system based on Gaussian kernel probability distribution, electronic equipment and a readable storage medium. A snow water equivalent increment detected by a snow water equivalent measurement module arranged in a target area, a precipitation amount detected by a precipitation amount measurement module and an evaporation and sublimation amount detected by an evaporation and sublimation amount measurement module are obtained. And performing Gaussian kernel function construction based on the snow water equivalent increment, the precipitation amount, the evaporation sublimation amount and the measurement error thereof, and determining the type of the snow blowing event according to the constructed Gaussian kernel function. And when the precipitation exceeds a preset threshold value and the wind-blown snow event occurs, determining the event as a mixed event, and determining the specific category of the mixed event according to the category of the wind-blown snow event. According to the scheme, the Gaussian kernel probability distribution is introduced, so that quantitative characterization of measurement uncertainty is realized, and the reliability of the classification result of the snow blowing event is improved.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
Precipitation measurement method, device and equipment based on mixed scanning data and medium
PendingCN120802402ARainfall/precipitation gaugesRadio wave reradiation/reflectionElevation angleAtmospheric sciences
The invention provides a rainfall measurement method and device based on mixed scanning data, equipment and a medium. Comprising the following steps: acquiring radar data based on a dual-polarization radar, and determining a target elevation angle and corresponding target radar data according to reflectivity echo characteristics of a plurality of elevation angles corresponding to each azimuth angle in the radar data and corresponding thresholds; determining a plurality of rainfall parameters in the target radar data and membership functions under a plurality of rainfall categories, and determining probability values of the rainfall categories according to the membership functions and parameter weight values of the rainfall parameters under each rainfall category; according to the probability value, the zero-degree layer height, a preset threshold value and continuous detection, determining a target rainfall category from the plurality of rainfall categories; according to the plurality of rainfall parameters, determining a rainfall rule corresponding to the target rainfall category from preset rainfall rules, and substituting the corresponding rainfall parameters into the rainfall rule to obtain a rainfall amount value corresponding to the target radar data; therefore, the accuracy of real-time measurement of the precipitation is improved.
Owner:XIAN HUATENG MICROWAVE
Portable precipitation measuring device
InactiveCN120428360ARainfall/precipitation gaugesInstrumental cooling apparatusThermodynamicsAtmospheric sciences
The invention relates to the technical field of precipitation measurement, in particular to a portable precipitation measurement device which comprises a controller and a collection frame, the bottom of the collection frame is fixedly connected and communicated with a treatment cylinder, the bottom of the treatment cylinder is fixedly connected with a fixed cylinder, a cooling assembly is arranged on the inner bottom wall of the treatment cylinder, and a driving assembly is arranged in the treatment cylinder; a filtering assembly is arranged in the treatment cylinder, a disturbance assembly is arranged on the treatment cylinder, and a protection assembly is arranged in the fixed cylinder. Through cooperative work of the filtering assembly and the cooling assembly, the storage temperature of rainwater is reduced while interference of external impurities is reduced, so that fluctuation of the temperature is reduced, the heated evaporation capacity of the collected rainwater is reduced, and the accuracy of precipitation data is ensured.
Owner:黄河水利委员会水文水资源信息中心
Precipitation measurement method and device based on passive impulse method
ActiveCN109387887AReal-time precipitationAchieve the role of popularization and promotionRainfall/precipitation gaugesICT adaptationMomentumMeasurement device
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Automatic precipitation measurement device and measurement method
ActiveCN103336318BSimple and straightforward way to measure precipitationMeet the requirements for measuring 300mm precipitationRainfall/precipitation gaugesICT adaptationElectrical resistance and conductanceEngineering
The invention relates to an automatic precipitation measurement device and a measurement method. The automatic precipitation measurement device comprises an L-shaped precipitation determination sensor formed by an L-shaped insulation board and a plurality of determination contacts Ai arranged on the L-shaped insulation board and a monitoring unit, wherein one ends of the determination contacts Ai are communicated with a power source anode V+ through resistors R, the other ends of the determination contacts Ai are connected with nodes Ji to be determined on the monitoring unit, the monitoring unit is connected with a power source cathode or a determination end point C through controlling the nodes Ji to be determined, whether equipment is at fault is determined according to voltage magnitude of the determination end point C, whether rainfall occurs is detected, and precipitation data is detected. According to the automatic precipitation measurement device and the measurement method, whether the rainfall occurs can be detected timely, a precipitation detection mode is simple, once the equipment is at fault, alarm information can be emitted instantly, so problems that whether the rainfall occurs can not be detected and the precipitation detection mode is complex existing in the prior art are effectively settled.
Owner:北京博研智通科技有限公司
Precipitation measurement method and measurement device based on passive impulse method
ActiveCN109387887BReal-time precipitationAchieve the role of popularization and promotionRainfall/precipitation gaugesICT adaptationMeasurement deviceAtmospheric sciences
The invention discloses a precipitation measurement method and device based on a passive impulse method, and belongs to the technical field of precipitation measurement. The method comprises the steps: setting a semispherical cover which is fully provided with force sensors, wherein different rain drops fall on the semispherical cover, and because the semispherical cover has radian, the impulses brought by the rain drops at different positions are different; the impulses, which are measured by a force sensor, in a direction perpendicular to a falling point gradually decrease from the top of the sphere to the periphery, and when the falling direction of the rain drops is tangential to the semispherical cover, the rain drops cause no impulse to the semispherical cover, and at this moment, the tangential direction is the falling direction of rain drops. The method also comprises the steps: employing a panel which is fully provided with the force sensors for calculating the total impulse of the rain drops according to the vertical impulses measured by the force sensor after the falling direction of the rain drops is obtained; calculating the mass of rain drops according to the momentumconservation and impulse conservation, wherein the motion of rain drops is considered to be constant speed motion in default when the rain drops fall to the ground, and acquiring the precipitation through the density of rainfall. The method ingeniously achieves the acquisition of the real-time rainfall without storing the rainfall.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Intelligent weighing type rainfall gauge
ActiveCN224122774UHigh measurement accuracyRainfall/precipitation gaugesWeighing apparatus for materials with special property/formHydrologyPrecipitationshed
The utility model provides an intelligent weighing type rainfall gauge, and belongs to the technical field of precipitation measurement. The problem that the rainfall intensity and the rainfall time period cannot be measured at the same time by a traditional rainfall meter is solved; according to the technical scheme, the weighing type rainfall sensor comprises a weighing type rainfall sensor body, the weighing type rainfall sensor body comprises a shell, the top of the shell is provided with a water bearing device, the shell is internally provided with a water measuring device, the water measuring device is communicated with the water bearing device through a water inlet pipe, the water inlet pipe is provided with a water stopping valve, and the bottom of the water measuring device is communicated with the outside through a water outlet pipe. A water stop valve is installed on the water outlet pipe, a water drain valve is installed on the water outlet pipe, a high-precision pressure sensor is installed at the bottom of the water meter, a control circuit board is further installed in the shell, the control circuit board is connected with the control ends of the water stop valve and the water drain valve through wires, and the control circuit board is further connected with the high-precision pressure sensor through a wire. The precipitation measuring device is applied to precipitation measurement.
Owner:TAIYUAN NO1 RADIO FACTORY
Ku / Ka dual-band satellite-borne rainfall measurement radar space radiation calibration method
PendingCN121899765ARadio wave reradiation/reflectionICT adaptationRadar radiationAtmospheric sciences
The invention relates to a Ku / Ka dual-band space radiometric calibration method for a satellite-borne rainfall measurement radar, and the method specifically comprises the steps: S1, carrying out the radiometric calibration of the satellite-borne rainfall measurement radar through a space radiometric calibrator, obtaining a corresponding relation between a radar working parameter and a radiation measurement error, and constructing a satellite-borne rainfall measurement radar radiation measurement error database; s2, training and learning the neural network through the satellite-borne rainfall measurement radar radiation measurement error database, and generating a satellite-borne rainfall measurement radar radiation measurement error estimation model; and S3, obtaining radar working parameters of the spaceborne rainfall measurement radar, performing radiation measurement error estimation of the spaceborne rainfall measurement radar through the spaceborne rainfall measurement radar radiation measurement error estimation model, and performing radiation error compensation according to a radiation measurement error estimation result. According to the invention, the calibration precision of the spaceborne rainfall measurement radar is effectively improved, and the rainfall inversion precision is further improved.
Owner:SPACE STAR TECH CO LTD