373 results about "Rain drop" patented technology

The invention relates to the technical field of soil splash erosion, in particular to a soil splash erosion simulation analysis system which comprises a rainfall simulator for simulating rainfall with different intensities and different pH values; the wind simulator adjusts wind speed and wind direction; raindrop data are measured by raindrop characteristic measuring equipment; the splash erosion simulation equipment simulates the process that raindrops drop on target soil to cause splash erosion and generate splash erosion substances; the data acquisition equipment acquires the corresponding initial pH value and initial conductivity of the target soil before rainfall; collecting the target pH value, the target conductivity and the target denudation depth of the target soil after rainfall, and the average weight diameter and the total target splattering amount of the target splattering substance corresponding to the splattering substance; the electronic equipment determines and establishes a splash erosion prediction model based on the raindrop pH value, the raindrop data, the wind speed, the wind direction and the data acquired by the data acquisition equipment, and the soil splash erosion simulation analysis system capable of quantitatively analyzing soil splash erosion in real time is developed.

The invention discloses an image rain removal method based on dual-channel fusion. The method comprises the following steps: establishing a data set containing an original rain image and a corresponding rain-free clear image; constructing a dual-channel fusion network for image rain removal; using loss, edge loss and frequency loss to form a mixed loss function for quantifying the difference between the rain-removed image and the rain-free clear image; training the dual-channel fusion network by adopting the data set; and the trained dual-channel fusion network is adopted to test a rain image to be subjected to rain removal, and a clear image after rain removal is obtained. According to the invention, a dual-channel fusion attention enhancement module, a mixed scale gating feedforward network module and the like are introduced into the model, so that the robustness and the feature extraction capability of the model are improved, and the model can better adapt to raindrop interference in different actual scenes.

The invention relates to the field of automobile electronic testing technology and equipment, and discloses a vehicle-mounted camera imaging quality testing method and device suitable for a rain and fog scene, and the method comprises the steps: installing a to-be-tested camera module in a rain and fog environment cabin, setting the spectrum and illumination of a top natural illumination simulation system, and simulating the illumination at different time periods; selecting a test target plate in the darkroom; starting an automatic centering module to align the optical axis with the standard plate reference; rain and fog parameters are set through the environment control host, the rain and fog supply system is started to simulate different levels of rain and fog environments, and the raindrop particle size, concentration, dripping speed, fog visibility and fogdrop particle size are dynamically regulated and controlled; shooting a target plate graph card, extracting characteristic parameters by an image analysis module, performing quantitative analysis, and generating an evaluation report, so as to solve the technical problem of singleness of rain and fog scene environment simulation in the prior art.

The invention discloses an urban low-altitude gridding management process control method and system based on unmanned aerial vehicle analysis, and belongs to the technical field of unmanned aerial vehicle flight management.The urban low-altitude gridding management process control method comprises the steps that urban three-dimensional data are obtained, an urban area is divided into multiple grid units, meteorological data are obtained, and a building interference evaluation model is constructed; importing the open angle and the building surrounding rate of each grid unit into a building interference evaluation model to calculate the building intensity, evaluating the reflection interference on the unmanned aerial vehicle through the number and intensity of reflection paths, constructing a meteorological interference model, obtaining the cloud cluster humidity distribution, raindrop particle size and wind parameters of the grid units, and calculating the building intensity. The method comprises the following steps: importing meteorological data into a meteorological interference model to evaluate a rainfall interference condition and a wind disturbance condition, constructing a flight risk evaluation model, and importing building density, a multi-path reflection error index, a rainfall interference index and wind disturbance intensity into the flight risk evaluation model to evaluate the flight risk degree of the unmanned aerial vehicle. And the safety of the flight path of the unmanned aerial vehicle is improved.

The invention discloses a wind turbine generator voiceprint self-adaptive detection method, system and device and a storage medium, and belongs to the technical field of wind power, and the method comprises the steps: collecting a voiceprint signal, raindrop diameter, environment humidity, environment temperature and atmospheric pressure of a wind turbine generator in real time through a sensor array; temperature and humidity coupling correction parameters are calculated based on the environment humidity, and real-time air density is obtained through correction according to an air density correction formula by means of the environment humidity, the environment temperature and the atmospheric pressure; constructing a rain intensity noise spectrum mapping model based on the raindrop diameter and the real-time air density in combination with a raindrop vertical fragmentation merging effect compensation algorithm; performing rain noise suppression on the voiceprint signal of the wind turbine generator by adopting a depth spectrum subtraction algorithm in combination with the rain intensity noise spectrum mapping model and the dynamic suppression factor to obtain a clean voiceprint signal; and matching the clean voiceprint signal with a preset wind turbine generator fault voiceprint feature library to complete wind turbine generator voiceprint adaptive detection.

The invention provides a vehicle management method based on visual identification. Comprising the following steps: performing visual image acquisition and basic feature identification on a vehicle in a target area, executing multi-source interference perception, acquiring raindrop volume concentration, a strong light incidence angle, vehicle tail gas heat flux density and a light intensity sudden change rate of the target area, and generating multi-factor coupling interference intensity data; executing dynamic exposure control based on the multi-factor coupling interference intensity data, outputting an exposure compensation coefficient and driving an image acquisition unit to adjust the shutter speed and the exposure duration; performing distortion correction feature extraction based on the image after exposure compensation coefficient correction, calculating image marginal definition and feature matching frequency deviation, and generating feature extraction confidence; judging whether to output a vehicle management recognition result or not according to the feature extraction confidence; the method can effectively deal with the composite interference scene, and solves the problems of low recognition precision and response lag.

A window framing system for installation in a shipping container wall aperture, including a corrugation cap to cover a lower edge of the aperture and the adjacent corrugations, and the corrugation cap configured for supporting a lower portion of a window within the window framing system. The corrugation cap is a C-shaped channel with inner and / or outer downwardly-directed portions configured for positioning adjacent inner and / or outer surfaces of the wall, respectively. The system may also include a rain drip member mounted on an upper surface of the frame to receive water on an upper surface and redirect the water outwardly away from the wall. Tabs can be used to assemble the side frame members to the header and footer frame members, allowing assembly by a single person, and the tabs may further allow securing of the frame components using holes outside the container envelope for fasteners (thus reducing the risk of leakage inside the wall cavity).

1. Name of the product of this design: Humidifier Bluetooth Speaker (Aromatherapy Raindrop Little Red Riding Hood‑ Y21). 2. Purpose of this product: used for playing audio, aromatherapy and increasing indoor air humidity. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention provides a rainfall monitoring method and system based on unmanned aerial vehicle multi-mode noise reduction in the technical field of environment monitoring and unmanned aerial vehicle application, and the method comprises the steps: S1, collecting a visible light image and a long-wave infrared image through a multispectral vision module after an unmanned aerial vehicle takes off, and collecting a rainfall audio from an acoustic cabin through a microphone; s2, carrying out noise reduction processing on the visible light image, the long-wave infrared image and the rainfall audio; s3, extracting a raindrop size distribution histogram and a spatial density thermodynamic diagram based on the visible light image and the long-wave infrared image, and extracting acoustic MFCC features based on rainfall audio; s4, performing feature fusion operation based on the raindrop size distribution histogram, the visual density thermodynamic diagram and the acoustic MFCC features to obtain rainfall intensity; and S5, carrying out cumulant dynamic compensation based on the rainfall intensity to obtain the cumulative rainfall. The rainfall monitoring method has the advantages that the precision, robustness and practical level of rainfall monitoring are greatly improved.

The invention discloses a rainfall monitoring method and device based on millimeter wave radar, and relates to the technical field of meteorological monitoring. The method comprises the following steps: controlling a 24 / 60GHz commercial millimeter wave radar to transmit a millimeter wave signal of an adaptive parameter to a preset area; a raindrop echo signal is received, and clutters are removed through Kalman filtering and wavelet noise reduction; extracting a one-dimensional energy feature, a two-dimensional speed feature and a speed-energy two-dimensional distribution matrix; inputting a low-error model trained by a random forest algorithm, calculating a rainfall energy value and mapping the rainfall energy value into a rainfall level; data is output through a LoRa / ZIGBEE network; the device comprises a millimeter wave radar module, a signal processing module, a calculation output module and a wireless communication module. The problems of single monitoring dimension, high cost and difficult deployment in the prior art are solved, non-contact, low-cost, high-real-time and distributed rainfall monitoring is realized, the error is less than or equal to 5%, the response period is less than or equal to 100ms, and the method is suitable for traffic, municipal administration, emergency and other scenes.

The invention provides a raindrop spectrum inversion model construction method and device, electronic equipment and a storage medium, and belongs to the technical field of signal processing, and the method comprises the steps: carrying out the model training of a plurality of base learners through part of model training data in a training data set; and fusing all the base learners after model training according to a preset integration strategy, constructing a raindrop spectrum inversion model, and verifying the constructed raindrop spectrum inversion model by using test set data. The invention provides a raindrop spectrum inversion model construction method and device, electronic equipment and a storage medium, and the method comprises the steps: taking a raindrop spectrum true value collected by a laser raindrop spectrometer as a label, taking a radar measurement parameter generated through T matrix scattering simulation as a sample to train a plurality of base learners, and carrying out the fusion according to a preset integration strategy, thereby obtaining a raindrop spectrum inversion model. And a data-driven raindrop spectrum inversion model is constructed, so that the accuracy and robustness of raindrop spectrum inversion are improved, and reliable support is provided for cloud precipitation microphysical research.

The invention relates to a ground precipitation intensity estimation method based on phased array radar echoes and geographic factors, which belongs to the field of radio, and comprises the following steps of: mapping and interpolating polar coordinate multivariable radar echoes and a three-dimensional wind field to a unified three-dimensional grid to form a consistent spatio-temporal data basis; then, various rainfall type areas are automatically divided based on local density clustering, a time lag field is constructed according to rainfall types, and adaptive time alignment of radar echoes and ground station observation is achieved; a three-dimensional wind field and a raindrop terminal end velocity are introduced to calculate rainfall falling drift, the position of a grid point matched with a ground station point space is corrected, and accurate space matching of radar echoes and ground station observation is completed; a terrain uplift index is constructed by combining a stratum wind direction, a DEM (Digital Elevation Model), a gradient, a slope direction and a slope position type, and a radar nonlinear precipitation potential vector and a terrain feature are jointly modeled through a physical constraint coupling model, so that quantitative estimation of the ground precipitation intensity is realized, and the reliability and applicability of ground precipitation estimation in a complex environment are improved.

Provided is a technique capable of further improving the visibility of pedestrians. A control device for a vehicle lamp for controlling the operation of a vehicle lamp having a variable light distribution mode, in which a controller controls the operation of the vehicle lamp when the relationship between a rainfall amount detected by a first sensor and a raindrop size detected by a second sensor satisfies a first weather condition in which a light curtain phenomenon is estimated not to occur. And a control unit that controls the vehicle lamp so as to irradiate a first light beam when the relationship between the rainfall amount detected by the first sensor and the raindrop size detected by the second sensor satisfies a second weather condition in which the light curtain phenomenon is estimated to occur, and controls the vehicle lamp so as to irradiate a second light beam. The vehicle lamp is controlled to irradiate a second light beam having an illumination set to be relatively lower than that of the first light beam.

The invention belongs to the technical field of geotechnical engineering disasters, and particularly relates to an intelligent rainfall simulation system and method for a slope stability experiment. The system comprises an intelligent rainfall simulation unit, a comprehensive monitoring unit, a real-time data fusion and adaptive control unit and a data analysis-visualization unit which are organically unified and matched with one another. According to the invention, intelligent control of the rainfall process can be realized, and the rainfall intensity, raindrop size and rainfall uniformity can be accurately adjusted; the system is high in integration level and high in automation degree, real-time multi-dimensional monitoring can be achieved, and high-precision and real-time analysis of experimental data and automatic risk early warning are achieved. Advanced monitoring means such as DIC full-field strain, optical fibers and acoustic emission are adopted, the experiment precision is remarkably improved, an accurate basis is provided for slope stability analysis and disaster prevention and control, and the method can be applied to the fields of engineering slope safety evaluation, education and public safety and has a good application prospect in the aspects of geological engineering, geotechnical engineering, colleges and scientific research and teaching, emergency drilling and science popularization and the like. And safety and disaster prevention awareness are improved.

The invention discloses an NRCS determination method for a Ku wave band scatterometer under a rainfall condition, and relates to the field of satellite ocean remote sensing and meteorological detection.The method comprises the steps that the action mechanism of rainfall on radar signals in the atmosphere is considered, and a sea surface radar back scattering theoretical model is constructed based on a wind-generated sea surface wave spectrum and a dual-scale Bragg scattering theory; obtaining a rainfall attenuation coefficient, a normalized radar backscattering cross section contributed by raindrop scattering and dual-polarization normalized radar backscattering cross sections of a C wave band and a Ku wave band based on a sea surface radar backscattering theoretical model; according to the rainfall attenuation coefficient, the normalized radar backscattering cross section contributed by raindrop scattering and the dual-polarization normalized radar backscattering cross sections of the C wave band and the Ku wave band, the normalized radar backscattering cross section of the Ku wave band scatterometer under the rainfall condition is obtained; according to the method, the accurate normalized radar back scattering cross section of the Ku wave band scatterometer is obtained under the rainfall condition.

The invention provides a low-illumination rainy day image enhancement method based on DEPMD-Net. Through heterogeneous double teachers and multi-stage distillation, polarized rain-light attention and implicit representation are introduced, separation and fusion of raindrop high-frequency information and illumination low-frequency information are realized, and an image with balanced brightness and without rain interference is generated. The method comprises the following steps: 1) synthesizing low-illumination rainy day data based on Rain100L and LOL-v1; 2) pre-training a brightness expert and a rain removal expert, and obtaining prior through bidirectional KL mutual learning; 3) utilizing brightness-rain mask statistics to construct joint priori, and adopting non-zero mean anchoring to simulate night rain distribution in diffusion noise scheduling; 4) proposing PiDNet-X to recover features through cooperation of a double-branch structure and rain-light attention, 5) performing staged distillation through a soft label and feature prompt, obtaining lightweight Student-C / F through a Born-Again strategy, and realizing night rain scene self-correction by double students in a reasoning stage through moving average and mutual learning.

The application relates to the technical field of aerosol measurement, and discloses an experimental device for studying the removal of atmospheric particulates by rainfall, which comprises an aerosol generating system 1, a droplet collecting device 2, an aerosol chamber 3, a droplet falling chamber 4 and a droplet generating system 5; the aerosol chamber 3 is used for measuring aerosol parameters; the aerosol generating system 1 is used for generating monodisperse aerosol particles with different particle sizes for the aerosol chamber 3; the droplet collecting device 2 is used for collecting droplets after reaction with aerosols; the droplet falling chamber 4 is used for measuring free falling of droplets and droplet parameters; the droplet generating system 5 is connected above the droplet falling chamber 4 and is used for generating monodisperse charged droplets. The application can simulate the collection experiment of different size raindrops on different particle size sections of aerosols by adjusting different raindrop and aerosol parameters, the generated aerosols have higher monodispersity, and experimental errors are reduced.

The invention discloses a building roof rainwater analysis method and device, a storage medium and electronic equipment. The method comprises the following steps: establishing a three-dimensional model of a target building roof; based on the three-dimensional model, the multiple groups of wind and rain coupling parameters, interaction characteristics of raindrop particles and the target building roof and physical characteristics of the target building roof, rainwater catchment flow, rain flow thickness and rainwater load distribution of all areas of the target building roof under the multiple groups of wind and rain coupling working conditions are determined respectively; the multiple groups of wind and rain coupling working conditions cover a combined scene of unfavorable wind directions, extreme wind speeds and extreme rainfall in different return periods of the area where the target building is located, and parameter values of wind and rain coupling parameters corresponding to each group of wind and rain coupling working conditions are different from one another; based on the rainwater catchment flow, the rainwater flow thickness and the rainwater load distribution of each region of the target building roof under the multiple groups of wind and rain coupling working conditions, determining an envelope extreme value of the rainwater action of the target building roof; and analyzing the rainwater confluence characteristics and the rainwater load of the target building roof based on the envelope extreme value.

To provide a wrap skirt made of water-repellent fabric, which is designed to be easy to use in daily life, to be comfortable to wear, to have a simplified shape, and to reduce the discomfort of raindrops and clinging. [Solution] A wrap skirt made of water-repellent material, consisting of a front body 1, a back body 2, and an overlapping portion 3 for overlapping the two bodies together, with the front body 1 on the right side of the outside of the back body and the overlapping portion 3 on the left side joined at their respective side seams 4, with the back body 2 at the center.The front body 1 has a convex curve 9 that smoothly connects the side seam 4 on the opposite side of the back body 2 to the hemline 8, and the overlapping portion 3 has a convex curve 9 that smoothly connects the line 7 from the waist end on the opposite side of the back body 2 to the hemline 8.

1. The name of the design product: chest (raindrop flash diamond). 2. The use of the design product: the design product is used for chest. 3. The design points of the design product: in the pattern. 4. The picture or photo that best indicates the design points: perspective drawing.

The invention belongs to the field of transformer monitoring, and particularly relates to an oil-immersed transformer protection state multi-dimensional monitoring device which comprises an oil-immersed transformer, the oil-immersed transformer is provided with a bearing block, the bearing block is provided with a connecting block, the connecting block is provided with a monitoring information collector, the oil-immersed transformer is provided with a shaking mechanism, and the shaking mechanism comprises a supporting block. The supporting block is provided with a vertical block, the vertical block is provided with a U-shaped sliding groove block, the U-shaped sliding groove block is provided with a traction opening, the traction opening is provided with a guide rod, the U-shaped sliding groove block is provided with a traction rack, the traction rack is provided with a sliding block, the sliding block is provided with an installation block, the installation block is provided with an extension block, the extension block is provided with an operation block, and the operation block is provided with an assembly block. The assembly block is provided with a push block. According to the multi-dimensional monitoring device for the protection state of the oil-immersed transformer, through the cooperation of the traction rack and the push block, the problem that in the prior art, raindrops and accumulated snow are easily attached to a connecting line, the load of the connecting line is increased, and the connecting line is damaged is solved.

The utility model relates to the technical field of outdoor all-in-one machines, and provides an outdoor machine which comprises a machine cabinet, a power generation assembly and a heat exchange device. The cabinet is provided with a chamber, and an air inlet and an air outlet which are communicated with the chamber; the power generation assembly comprises a solar cell panel and a raindrop friction power generation panel, and the solar cell panel and the raindrop friction power generation panel are arranged outside the compartment. The heat exchange device comprises an air conveying assembly, and the air conveying assembly is arranged in the compartment and electrically connected with the solar cell panel and the raindrop friction power generation panel; the air conveying assembly is used for driving air to enter the compartment from the air inlet and then be exhausted from the air outlet. The outdoor machine disclosed by the utility model can collect electric energy no matter in sunny days or rainy days, and the collected electric energy is utilized to ensure the normal operation of the air supply assembly, so that the normal heat dissipation protection requirement of the outdoor machine in a non-use state is met.

The invention relates to an intelligent door and window control system, and belongs to the technical field of intelligent doors and windows, the intelligent door and window control system comprises a control module, a comprehensive sensing module and an intelligent window, the comprehensive sensing module and the intelligent window are electrically connected with the control module, and the control module is used for instructing the opening angle of the intelligent window. The comprehensive sensing module comprises a wind speed sensor and a raindrop sensor, the wind speed sensor is used for detecting wind speed and uploading wind speed data to the control module, and the raindrop sensor is used for detecting rainfall and uploading rainfall data to the control module; the control module calculates a comprehensive risk coefficient according to the wind speed data, the rainfall data and the wind speed stability coefficient, judges whether the comprehensive risk coefficient exceeds a threshold value or not, and instructs the intelligent window to reduce the opening angle when the comprehensive risk coefficient exceeds the threshold value; multi-parameter judgment is introduced, and opening angle adjustment judgment is accurate.

The utility model relates to the technical field of soil stabilizers, and discloses a splicing type soil stabilizer which comprises a suspension device main body, a convex block is arranged on the suspension device main body, the convex block is fixedly connected to the upper surface of the suspension device main body, a groove is formed in the lower surface of the suspension device main body, a fixing column is fixedly connected to the bottom of the suspension device main body, and the fixing column is fixedly connected to the bottom of the suspension device main body. According to the utility model, a plurality of groups of suspension device main bodies are spliced and tightly connected to form an integral protection network, so that the soil is effectively prevented from being washed by rainwater, meanwhile, the bump design on the upper surface disperses the impact force of raindrops, the original structure of soil particles is protected, and the honeycomb-shaped grooves on the lower surface increase the friction force with the soil, so that the soil is protected. The soil particles can be better embedded in the device, the stabilization effect of the device on the soil is enhanced, the soil is effectively prevented from sliding or being washed away under the action of water flow, and therefore the water and soil loss problem of the tea garden is remarkably reduced.

This application discloses a multimodal rain-sensing wiper system for vehicles, comprising: a multimodal sensing module that collects first sensing data characterizing the state of rainwater on the glass surface and second sensing data characterizing the motion state of raindrops in the air; an intelligent control module that fuses the two types of data to generate a fused rainfall feature value and generates a wiping mode command accordingly; and a low-noise execution module composed of vibration-damping composite material and a buffer device that executes the wiping action and suppresses noise. This application solves the problem of low recognition accuracy of a single sensor by fusing optical and radar sensing data from different sources, achieving accurate determination of rainfall intensity; simultaneously, it utilizes the damping properties of the composite material and the buffer device to reduce noise from both the vibration source and the transmission path. Compared with existing technologies, this application improves rainfall detection accuracy and controls operating noise at a low level, significantly improving driving safety and comfort.

The invention discloses an intelligent greening treatment system suitable for a high and steep rock slope, and relates to the technical field of slope greening. According to the system, through the synergistic effect of the vegetation growth base body of the double-layer combined structure and the intelligent regulation and control module, the wind and rain damage resistance and the vegetation survival rate are remarkably improved. The outer layer of the base body adopts acoustic-mechanical coupling energy dissipation structure resonant cavity design, mechanical energy is efficiently converted into heat energy to be dissipated by matching wind load, raindrop impact frequency and inherent frequency of a cavity, and structural damage caused by wind and rain scouring is effectively reduced; a soil sensor and a biosensor are integrated to monitor data in real time, a controller is linked with water and fertilizer integrated equipment and an adjustable spectrum LED growth lamp, and the water and fertilizer ratio and the illumination intensity are dynamically optimized; meanwhile, a water storage layer, a slow-release regulation and control layer and a water guide interface layer are arranged in the base body, so that directional water dredging and nutrient soil immobilization during heavy rainfall are achieved, reverse capillary water supply is achieved through a bionic capillary suction cup and a root system guide pipe during drought, and continuous water supply of vegetation is guaranteed.

The invention discloses a TSTFP-Net-based semantic segmentation method for a low-illumination superposition rain image, and the method aims at an image segmentation scene shot in a weak light and rainy environment, and solves a problem that the semantic segmentation precision is reduced because of insufficient illumination, raindrop interference and a significant distribution difference between a source domain and a target domain. The method comprises the following steps: 1) processing an existing data set; 2) designing a semantic segmentation network based on low illumination and rain superposition of TSTFP-Net; 3) training the RIPLM network; 4) training a trunk segmentation network; 5) training a space domain and frequency domain double-teacher network; the method comprises the following steps of (1) training an FSFM module, (2) training a comparison learning module, (3) training a domain discriminator network, and (4) testing a semantic segmentation network with low illumination and rain overlay. The method can still accurately identify the contour and category of an object in complex weather, improve the domain generalization performance, reduce the domain gap, and further improve the precision of semantic segmentation in the low illumination and rain overlay environment.

The ventilation air conditioner installation structure for the building electromechanical engineering comprises a back plate and a supporting plate, four adjusting installation holes are formed in the back plate, two sets of positioning installation holes are formed in the back plate, a protection plate is movably installed on one side of the back plate, a pull rod is fixedly installed on the top of the protection plate, and the supporting plate is fixedly installed on the back plate. Two mounting plates are fixedly mounted at the top of the pull rod, three groups of transverse mounting holes are formed in the supporting plate, three groups of vertical mounting holes are formed in the supporting plate, two vertical strips are movably mounted at the top of the supporting plate, and two transverse strips are movably mounted at the top of the supporting plate; according to the ventilation air conditioner, through the arrangement of the protection plate and the PE protection net, when the ventilation air conditioner is installed outdoors, raindrops and falling objects are shielded for the machine body through the protection plate, and flying objects and birds are intercepted through the PE protection net, so that a protection effect is provided for the machine body, the sunshine weathering effect is reduced, and the service life is indirectly prolonged.

The invention relates to the technical field of intelligent garden machinery, and discloses a rainwater sensing method and device, courtyard operation equipment and a medium, the shielding formed by raindrops on a glass cover is sensed through a laser radar, and the distribution characteristics of the shielding are analyzed to judge the rain, so that the high sensitivity and the quick response which are far better than those of a traditional rainwater sensor are realized; the detection reliability is not influenced by water quality; according to the method, the existing laser radar of courtyard operation equipment can be reused, extra hardware cost is avoided, maintenance requirements are reduced, and meanwhile, the method has excellent anti-interference capability and accuracy through multi-parameter fusion analysis.