134 results about "Light rain" patented technology

The invention relates to a method for estimating the nonpoint source pollution load of a village adjacent to a river. The method comprises the following steps: 1) basic information collection, in which average rainfalls R1, R2 and R3 of years of accumulation for light rain, moderate rain and heavy rain to rainstorm in a certain place, village area A and other basic situations are acquired; 2) field detection, in which, every runoff coefficient, runoff duration and runoff yield area of rainfall duration, rainfall capacity and rainfall runoff of an effective rainfall number are detected, and chemical oxygen demand, total nitrogen and total phosphorus of a collected water sample are detected; and 3) nonpoint source pollution load model estimation, in which, the annual pollution loads of chemical oxygen demand, total nitrogen and total phosphorus of nonpoint source pollutants of the village by the river are calculated by adopting a formula. The calculation method provided by the inventionhas more guidance significance, and is convenient to develop related control and management measures.

The invention discloses a novel plastic membrane mulching peanut cultivation method and a seeding machine thereof, and relates to a novel plastic membrane mulching peanut cultivation method in the field of agricultural technology. The method comprises soil preparation and seeding, and is characterized in that furrows 5 are pressed on a coverage membrane 3 of a ridge surface 2 along two cultivation rows 4, soil 6 is covered in the furrows, and a cross section outline of the ridge surface 2 on a furrow pressed cultivation ridge 1 is similar to W shape. The method has the advantages that the coverage membrane of the ridge surface is pressed with the furrows and covered with the soil, the seeds can automatically break the membrane when sprouting and the sprouts can come out so as to cancel manual membrane breaking and sprout putting and not to destroy the soil moisture content under the membrane and the soil environment under the membrane. Because the cultivation rows are pressed with the furrows and covered with the soil, the cultivation rows cannot be blown away by wind; and the light rain can fall into the furrows, does not run off and can permeate under the membrane to drip along membrane holes so that the ineffective rainfall becomes effective utilization. The flat ridge surface at the root of peanut plants is changed into a concave stereo ridge surface, and the change is favorable for the growth and fructification of the first and second pairs of lateral branches of the root. Therefore, the factors of the method are more favorable for yield increment.

The invention discloses a 0.1mm and 0.5mm sense quantities combined multi-tipping bucket rainfall sensor. A cylindrical rain holder is arranged; a base is arranged at the bottom of the cylindrical rain holder; and a lower water collector, a lower large tipping bucket, a middle water collector, a middle small tipping bucket, an upper water collector, an upper small tipping bucket, a vertical board and a funnel which are all arranged on the base in the rain holder in sequence from the top down, wherein an anti-blocking device is arranged above the funnel. The 0.1mm and 0.5mm sense quantities combined multi-tipping bucket rainfall sensor is reasonable in structure, novel and initiative at home; the technical indexes exceed the rule of the national standard GB / T11832-200 tipping bucket type rainfall gauge; and the disadvantage that the traditional double-tipping bucket type rainfall sensors can not tip rapidly in heavy rain and do not tip in light rain. The 0.1mm and 0.5mm sense quantities combined multi-tipping bucket rainfall sensor is suitable for measuring the rainfall of areas with big rainfall intensity change and continuous rainstorms, and can fill the gap of the domestic rainfall sensors for the measurement of heavy rain.

The invention discloses a method for detecting and identifying raindrops in a video image. The method comprises the following steps of: firstly, detecting the raindrops by a FastICA algorithm according to the characteristic of raindrop motion; secondly, performing image binarization by a marginal information guidance-based process; and finally, identifying the raindrops according to the statisticcharacteristics of areas, direction angles and widths of a communication area in a binary image. The method can realize the detection and identification of the raindrops in the video image, is suitable for scenes of heavy rain, light rain, a dynamic state and a static state, and establishes the foundation for the removal of the raindrops in the video image.

The invention discloses a porous pavement for a sponge city, comprising a pavement body and draining ditches at both sides of the pavement body; the pavement body includes a permeable asphalt concrete layer, a permeable roadbed layer, a water-retained roadbed layer and a tamping roadbed layer which are arranged orderly from top to bottom; the permeable roadbed layer is formed by splicing several permeable roadbed prefabricating blocks, a joint is reserved between adjacent permeable roadbed prefabricating blocks; permeable grooves are arranged on the upper surface and the side wall of every permeable roadbed prefabricating block. The porous pavement for the sponge city can make much rain permeate in rainstorm comes, so ass to effectively prevent the urban inland inundation; for a light rain, much rain can return to an urban underground water circulation system; moreover, air humidity can be added when the weather is dry and hot, so as to adjust urban temperature and humidity; moreover, massive building waste recycled aggregates are applied; therefore, porous pavement is advantageous of economy and environment-friendly.

An intelligent telescopic drying rack based on internet of things comprises a light-rain / pressure sensor, a raindrop sensor, a power supply module, a central control unit, a remote cellphone terminal, a control motor, and a rack retracting device. The central control unit is connected respectively with the light-rain / pressure sensor, the raindrop sensor, the power supply module, the remote cellphone terminal, the control motor and the rack retracing device. The intelligent telescopic drying rack based on internet of things has an automatic operating mode and a manual operating mode and can automatically retracted for drying in the sun according to weather conditions through intelligent detection and intelligent control.

A universal portable vehicle canopy unit is provided for a front engine riding lawn mower style vehicle and includes suction cup affixing to the rear fender for easy assembly and disassembly of unit to vehicle. The portable vehicle canopy is supported by two vertical upright tube assemblies that are pivotally connected to the vehicle. Front and back of the canopy framework is held upright by adjustable length straps. A flexible canopy sheet assembly constructed of light weight nylon or similar materials is supported by the top canopy framework cross beams. Main usage for the portable vehicle canopy would be protection from sun light. Secondary usage for the portable vehicle canopy would be to ward off light rain. Material of the canopy frame work structure is light guage aluminum bent tubing or plastic molded tubing.

The invention discloses a wind and rain power generation system which comprises a wind-collecting device, a rain-collecting device, a driving device and a power generating device, wherein the wind-collecting device comprises a wind-collecting channel which is enclosed on a water plane and receives wind blowing from all directions and changes the wind directions into inward and downward directions; the rain-collecting device collects falling rain; and the wind-collecting device and the rain-collecting device can singly or cooperatively act on the driving device so as to drive the power generating device for generating electricity. The wind and rain power generation system can comprehensively utilize wind and rain in nature, can not only generate electric energy when only in windy days or rainy days, but also can work under the condition of the simultaneous existence of wind and rain, can be started during gentle breeze and light rain, and realizes overload protection when in strong wind and heavy rain. All devices are fixedly placed, therefore, the wind and rail power generation system is safe and reliable. The invention has the advantages of enlarging the energy-collecting range, lowering the power generation cost, prolonging the service life and being beneficial to the popularization and the use.

The invention relates to a compensation structure and method for eliminating the dynamic error of heavy rain and light rain. The compensation structure comprises a frame, an upper bucket, and a dump bucket body. Two dump bucket rooms are arranged on the dump bucket body horizontally symmetrically. The upper bucket and the dump bucket body are in rotatable connection with the frame and are synchronously overturned by a linkage member in opposite directions. The upper middle part of the upper bucket is in rotatable connection with the frame via a rotating shaft A. The lower middle part of the dump bucket body is in rotatable connection with the frame through a rotating shaft O. The rotating shaft A and the rotating shaft O are parallel. The bottom surfaces of the dump bucket rooms are rotating curved surfaces. The rotation axis of the rotating curved surfaces is parallel to the rotating shaft O of the dump bucket body, and is located on the upper side of the dump bucket rooms. The bottomof the upper bucket is recessed downwards to form a temporary storage room for temporarily storing rainwater. The upper bucket includes two side plates symmetrically arranged in front and back. The lower parts of the two side plates are connected together through a bottom plate. The middle part of the bottom plate is recessed downwards. The two ends of the upper bucket are narrower than the middle part of the upper bucket. The compensation structure is simple in structure and reasonable in arrangement, and can compensate dynamic errors and can improve measurement accuracy.

The invention provides a sweeping spraying type slope rainfall system composed of a rainfall support device, a rainfall sweeping spraying control device and a rainfall waterway device. The variable-slope sweeping spraying type slope rainfall test device is used for simulated rainfall of slopes with the different slope types outdoors or indoors in geotechnical engineering, is good in rainfall uniformity, stable in water supply pressure and good in controllability, can simulate all-day continuous rainfall in a natural state, regulate and control the rainfall intensity and achieve light-rain rainfall simulation, is provided with rainfall spray heads which have the stable vertical distance to the ground and can do reciprocating motion, can simultaneously output multiple ways of water flows with the uniform and stable water pressure and is stable and downward in spray head spraying direction, convenient to disassemble, assemble and transport, capable of adjusting the slope and suitable for the double-faced slope.

The invention discloses an urban small watershed classification and grading intelligent scheduling method. According to the invention, the method comprises the steps: taking rainfall forecast as a judgment condition; starting different scheduling modes according to the rainfall prediction situation, namely, rain-free starting ecological water supplementing scheduling, light rain starting water environment scheduling, medium rain starting water environment-flood prevention and drainage combined scheduling and heavy rain-rainstorm starting flood prevention and drainage scheduling; automaticallyswitching the scheduling modes along with the change of the rainfall situation, and dynamically adjusting the scheduling scheme. The complex comprehensive scheduling problem of the urban small watershed is decomposed through classified scheduling, so the processing scheduling target is clear, the scheduling model is simple, the calculation efficiency is higher, and the operability is higher; meanwhile, a simulation and optimization combined method is adopted, and a scheduling process is decomposed through a 'plan scheduling-optimal scheduling' two-stage scheduling mode, so the repeated trial process of an optimal scheduling scheme can be skipped, the time is saved, the efficiency is improved, and meanwhile, the method is more practical and more applicable to basic-level scheduling personnel.

The invention belongs to the field of experiment simulation and discloses a rainfall simulation device. A rainfall nozzle is connected with a high-pressure water pipeline; a rainfall control valve is arranged on the high-pressure water pipeline; the high-pressure water pipeline comprises a large rainfall high-pressure water pipe and a small rainfall high-pressure water pipe; the rainfall control valve comprises a large rainfall control valve and a small rainfall control valve which are arranged on the large rainfall high-pressure water pipe and the small rainfall high-pressure water pipe respectively; the nozzle comprises at least four heavy rain nozzles connected with the large rainfall high-pressure water pipe and at least four small rain nozzles connected with the small rainfall high-pressure water pipe; and at least four heavy rain nozzles and four small rain nozzles have different coordinates projected on the water level and form a heavy rain nozzle array and a small rain nozzle array respectively. The rainfall simulation device has vivid rainfall simulation and good simulation effect.

The invention discloses a mixed embedding method of dried sludge and household garbage. Embedded materials include the household garbage and the dried sludge. The mixed embedding method comprises the following steps: embedding a layer of household garbage at a designated position, embedding a layer of dried sludge on the layer of household garbage, and embedding the household garbage and the dried sludge alternately to achieve a set embedding height; and embedding the dried sludge on the uppermost layer. The mixed embedding method has the beneficial effects that (1) in a sandwiched household garbage and sludge co-embedding mode, the sludge can be normally and safely embedded under the weather condition of light rain; (2) stink generated by coverage of the sludge on the scene is mainly from NH3 which is high in threshold value, easy to diffuse and dilute, and small in influence range; (3) the content of percolate organic matters is reduced to a certain extent and tends to be stable, and the chemical oxygen demand (COD) is 48,600mg / L.

The invention discloses a rain room for an air-tightness detection system. The rain room comprises a rain room body. A spray system is arranged inside the rain room body. A return water pool is arranged at the bottom of the rain room body. The rain room further comprises a spray head mounting plate which is mounted inside the rain room body through a linear drive mechanism. The spray system includes a spray head which is connected to the return water pool through a water delivery pipe. The spray head is fixed on a rain room body mounting plate. A first water pump and a filter are arranged on the water delivery pipe. The rain room further comprises a flow control mechanism mounted on the water delivery pipe. According to the rain room for an air-tightness detection system of the invention, the rainfall and the distance between the spray head and a vehicle to be detected can be controlled by the flow control mechanism, natural environments such as light rain, moderate rain and heavy rain can be simulated accurately, control is performed through a control system, and artificial adjustment is reduced.

The invention discloses an eccentric sand clock type diversion ditch. The eccentric sand clock type diversion ditch is of a rectangular structure and is composed of a main ditch body (1) and a diversion chamber (6), wherein a water inlet end (2) and a water outlet end (3) are arranged at the two ends of the main ditch body (1), a water-blocking weir plate (4) is arranged at the side close to the water outlet end (3), the water-blocking weir plate (4) and two sides of the main ditch body (1) respectively form a 45-degree included angle, the main ditch body (1) is connected with the diversion chamber (6) through an eccentric sand clock type diversion hole (5), a floating barrel (7) and a floating barrel guide rope (8) are arranged under the eccentric sand clock type diversion hole (5), the floating barrel (7) can move up and down along the floating barrel guide rope (8), and a diversion effluent pipe (9) is arranged at the tail end of the diversion chamber (6). The eccentric sand clock type diversion ditch can not only control all the polluted runoffs caused by light rains and initial runoffs of medium and heavy rains, but also implement partial control in the whole process of runoffs of medium and heavy rains.

The invention relates to the technical field of municipal equipment, and discloses a buoyancy type self-cleaning flood gate for an underground garage. The buoyancy type self-cleaning flood gate comprises a door frame, a floating gate body, a buoyancy cavity and a flood discharge cavity. The door frame is movably connected with the floating gate body, the floating gate body is arranged in the buoyancy cavity, and the buoyancy cavity communicates with the flood discharge cavity. According to the buoyancy type self-cleaning flood gate for the underground garage, when there is a light rain and water flow is relatively slow, the buoyancy cavity is a closed space, and a sediment accumulation phenomenon cannot occur. When there is a heavy rain, the floating gate body is triggered to stretch out to block water, one-time high-pressure water column cleaning can occur, so that less silt is accumulated at the bottom of the buoyancy cavity all the time, and it is ensured that the floating gate bodycan stretch out and draw back normally so as to guarantee normal passing of a vehicle. In addition, an inflation air bag carries out sealing protection on the top of the floating gate body, the siltand garbage are prevented from blocking the floating gate body, the force effect of the vehicle on the floating gate body is reduced, and location deformation of the floating gate body is reduced.

A rectangular wing formed by two parallel fiberglass ribs, tubular leading edge and tubular trailing edge with a nylon cover. The attack angle of the leading edge is controlled by the rider of the bicycle or tricycle giving lift to the wing. This lift assists in the support of the wing allowing for lighter wing ribs to be used in the construction. The lighter construction and reduced wind resistence increases the efficiency of the bicycle or tricycle using less human effort for propulsion while providing protection from sun and light rain.

The invention provides a CNN based rain measurement identification of a marine radar. The method comprises a model building process, a model optimization process and a model training process. The method is based on a classical LeNet-5 CNN model. A multi-level residual CNN model is established, a training set is established by using samples of light rain, medium rain and heavy rain, and input intothe multi-level residual CNN to train the network model, the loss rate is calculated by using a cross entropy loss function, the minimum loss is obtained rapidly, and achieving a very good convergencestable state by using a batch training mode.

The invention discloses a primary rainwater purification device which comprises a finished product box, a cover plate, an inner chamber and an outer chamber, wherein a sewage intercepting basket is fixed at the middle part of the inner chamber; a water inlet pipe communicated with external sewage is arranged at the position, above the sewage intercepting basket, in the inner chamber; an inner overflow port and oil absorption cotton attached to the inner wall of the inner chamber are arranged in a region, at the lower part of the sewage intercepting basket, of the inner chamber, and the inner overflow port is higher than the oil absorption cotton; a seepage hole is formed in a bottom plate of the finished product box; a reinforced filtering material bag is arranged in the region, in the inner chamber, above the bottom plate of the finished product box; and common filtering filler is arranged in the region, between the outer chamber and the inner wall of the finished product box, above the bottom plate of the finished product box. The primary rainwater purification device can effectively control non-point source pollution in light rain, and the filtered water can directly infiltrate for nourishing the green area; and the primary rainwater purification device can economically and effectively control non-point source pollution in heavy rain and can keep drainage unblocked. A plurality of assemblies are synergistic, so that installation and maintenance are convenient.

The invention discloses a rainfall test system comprising a rainfall room and a blow-dry room which is connected with the rainfall room. A blow-dry system is arranged in the blow-dry room. A spraying system and an image photographing and monitoring system are arranged in the rainfall room. A water recycling tank is arranged at the bottom part of the rainfall room. The rainfall test system also comprises a spray head installing plate. The spray head installing plate is installed in the rainfall room through a linear driving mechanism. The spraying system comprises spray heads which are connected with the water recycling tank through water ducts. The spray heads are fixed on the rainfall room installing plate. First water pumps and filters are arranged on the water ducts. The rainfall test system also comprises flow control mechanisms which are installed on the water ducts. A rainfall calibration system is arranged at the bottom part of the rainfall room. According to the rainfall test system, the rainfall capacity and the distance between the spray heads and an automobile to be tested can be controlled through the flow control mechanisms so that accurate simulation of light rain, moderate rain and heavy rain and other natural environments can be realized, and thus detection of the automobile sealing performance can be realized.

The invention relates to agricultural devices, and discloses a spiral water spray pipe device which is mainly suitable for water spraying for rainfall through a quick rainfall mist sprayer. Matched spiral water spray pipes are changed properly due to the facts that work natures are different and needed power is different, the suitability degree of rainfall of heavy rain, moderate rain and light rain is effectively guaranteed, and agricultural machines and equipment are low in carbon, environmentally friendly and safe and save energy. The spiral water spray pipe device mainly comprises an injection pipe cone injection opening (1), an electric control valve (2), a spiral injection pipe and valve connection straight pipe (3), an injection pipe cone injection opening and cylindrical pipe supporting connecting plate (4), a spiral injection pipe bearing cylindrical pipe (5), a spiral injection pipe (6), a spiral injection pipe fixing plate (7), a mist water spraying ring (8), a mist water spraying ring fixing plate (9) and other components.

The invention provides a method and system for detecting and removing raindrops in light rain scene video data. The method for detecting the raindrops includes the steps that pixels to be processed in initial color video images are extracted; whether the corresponding brightness difference, in the two adjacent frames of images, of the pixels falls in a preset range or not is judged, and the pixels falling in the preset range are brought into initial check results; the variable quantity of a single channel representing a color attribute and / or the difference between variable quantities of two channels representing color attributes, in the two adjacent frames of images, corresponding to the pixels is compared with a set threshold value to screen the initial check results, and a screening result marked with the raindrop pixels is obtained. According to the method and system for detecting and removing the raindrops, the brightness difference between the two frames in a light rain scene can be used for a raindrop initial check, chromatic characteristics are used for constraint to eliminate non-rain components, the real raindrops are detected out, and finally the raindrops are removed to recover a video; the correct rate of raindrop detection is increased, the omission ratio is reduced, and the quality of video recovery is improved.

The invention discloses a reservoir flood control limit water level dynamic adjustment method based on forecast error override fortification. The method comprises the steps of 1, realizing rainfall forecast grading; 2, determining an override control rainfall threshold; 3, obtaining rainfall forecasting grade information in the next 24 hours and judging whether the rainfall forecasting grade in the next 24 hours is a rainfall forecasting grade of light rain or below; 4, dynamically adjusting reservoir flood control limit water level of the rainfall forecast levels of the light rain and below the light rain; and 5, dynamically adjusting the reservoir flood control limit water level of the moderate rain and precipitation prediction grade above the moderate rain. According to the method, thereservoir is protected according to the condition that the average areal rainfall on the drainage basin is equivalent to the forecast override rainfall; the corresponding safety limit water level is reversely deduced according to the reservoir flood control capacity and the safety discharge control flow, the flood control water level is deduced on the basis of rainfall forecasting, the possible precipitation value range is expanded in an override mode while the forecasting precision is considered, the utilization of flood resources by the reservoir is increased, and the flood regulation risk of the reservoir is reduced.

The invention relates to a clean water and sewage separate two-stage drainage system of a bridge. An upper release pipe and a lower release pipe are connected in a sleeved mode, and the lower release pipe is communicated with a longitudinal drainage pipe. A longitudinal slope is arranged on the longitudinal drainage pipe, and the bottom of the longitudinal slope is connected with a sewage treatment system. A tee joint with a water outlet upwards inclined is arranged on the longitudinal drainage pipe, the bottom of the water outlet in the tee joint is higher than the bottom of the longitudinal drainage pipe at the corresponding position, and the height difference is namely a water level limit value. The end of the water outlet in the tee joint, with the water outlet upwards inclined, arranged on the longitudinal drainage pipe is connected with a vertical drainage pipe through a hose. By the adoption of the clean water and sewage separate two-stage drainage system, at the early stage of a heavy rain and when a moderate rain and a light rain occurs or other bridge deck sewage occurs, the water level is lower than the bottom of the water outlet in the tee joint, and accumulated water flows into the sewage treatment system only through the longitudinal drainage pipe. When the water level is higher than the bottom of the water outlet in the tee joint, a part of the accumulated water flows into the sewage treatment system through the longitudinal drainage pipe, and the other part of the accumulated water flows into the vertical drainage pipe through the tee joint to be drained. The clean water and sewage separate two-stage drainage system can drain kinds of bridge deck accumulated water in time and reduce loads of the drainage system, the sewage treatment system and the bridge.

The invention relates to the technical field of rainwater treatment, and discloses an abandoning, purifying and storing system for rainwater. The abandoning, purifying and storing system comprises a purifying and storing chamber, wherein a shell is arranged in the purifying and storing chamber; the shell is provided with a water inlet port, a water outlet port and an overflow port in sequence from bottom to top; a filtering and storing layer is arranged between the water inlet port and the water outlet port in the shell; the water outlet port is mutually connected with a water discharge pipe outside the purifying and storing chamber. By using the abandoning, purifying and storing system, the abandoning, collection and purification functions of the rainwater are realized at a light-rain time interval; the difference of the water quality of the collected rainwater is reduced; the recovery is facilitated; moreover, at a torrential-rain time interval, water can be quickly discharged.

The invention provides a municipal rainwater and sewage diversion device and method. The municipal rainwater and sewage diversion device comprises a pool body, a cover plate, a partition wall and a diversion groove with an opening, wherein the cover plate is arranged at the top end of the pool body, and a rainwater inlet is formed in the cover plate; the partition wall is arranged in the pool body and divides the pool body into a rainwater pool and a sewage pool; the diversion groove is rotationally connected with the inner wall of the pool body through a rotating shaft and is positioned between the top end of the partition wall and the rainwater inlet; the opening of the diversion groove is opposite to the rainwater inlet, and a water outlet hole is formed in the side wall, located on one side of the sewage pool, of the diversion groove; the water outlet amount of the water outlet hole is smaller than the water inlet amount of the rainwater inlet in the case of heavy rain and larger than or equal to the water inlet amount of the rainwater inlet in the case of light rain. According to the municipal rainwater and sewage diversion device and method, sewage and rainwater diversion is carried out when rainfall is different, the situation that rainwater and sewage mixed water with substandard water quality is discharged into a river channel to cause pollution is avoided, and meanwhile the situation that the rainwater and sewage mixed water with the substandard water quality is conveyed to a sewage treatment plant to waste resources of the sewage treatment plant is avoided.

The invention discloses a windscreen wiper control method based on a rainfall change rate. The method comprises the steps that: rainfall values output by a rainfall sensor are collected with delta T as the time interval in a rainfall collection period T, and the rainfall change rate of each collection point is calculated; and the number of the data of the rainfall change rate falling in the rain-free threshold interval, the light rain threshold interval, the medium rain threshold interval and the heavy rain threshold interval in the acquisition period T are put into statistics, the current rainfall state is determined according to the maximum value of the number of the data falling in the four intervals, and the motion state of a windscreen wiper is controlled according to the rainfall state. According to the method of the invention, the rainfall state and the jump of the rainfall state can be accurately judged according to the rainfall change rate, so that the windscreen wiper is controlled to move at a speed suitable for different rainfall states.

The invention relates to the field of radius-adjustable umbrella frame devices, and provides a radius-adjustable umbrella frame device. The device is characterized in that a frame body of the radius-adjustable umbrella frame device comprises a folding device which is used for folding the frame of the radius-adjustable umbrella frame device so as to shorten the radius of the frame of the radius-adjustable umbrella frame device. The invention has the advantages of adopting the radius-adjustable umbrella frame device, ensuring that the radius of the radius-adjustable umbrella frame device can be adjusted, contracting and expanding the area of an umbrella through radius adjustment so as to adapt the umbrella to different demand of light rain and heavy rain, as well as different need in sunny days and rainy days.

The invention discloses a rainfall detection method based on video image, including such steps as collecting water surface gray image sequence with single camera at fixed time interval, dividing the water surface gray image sequence into training sample image and to-be-measured image, dividing training sample image into no rain, light rain, moderate rain and heavy rain according to rainfall, and marking; enhancing the image texture by adopting the method based on the phase consistency, and performing the gray difference between two frames of images at the adjacent time after the enhancement toobtain a residual image; carrying out fast Fourier transform on the residual image to obtain the residual amplitude spectrum, normalizing the residual amplitude spectrum, and extracting four features; training the SVM classifier according to the extracted residual amplitude spectrum features; using the generated SVM classifier to identify the rainfall type of the image to be measured. The invention has the advantages of small calculation amount, low cost and intuitive and easy verification.

The invention discloses a rainfall measurement method and system based on an all-sky imager. The method comprises the following steps: acquiring real-time cloud picture video data acquired by the all-sky imager; converting the cloud picture video data in a current preset time period into a plurality of single-frame image data, and converting each single-frame image data into a gray level image; subtracting two adjacent frames of gray level images to obtain a plurality of difference images; if a change value of each difference image in the current preset time period is greater than a preset threshold, determining a raindrop pixel area according to each difference image in the current preset time period, wherein the raindrop pixel area is an area occupied by the raindrop in the image; and determining a rainfall of the current preset time period according to the raindrop pixel area and a relationship between the preset raindrop pixel area and a raindrop volume. According to the invention,the real-time cloud picture video data is collected through the all-sky imager, the cloud picture video data is converted into the gray level image, the rainfall of the current preset time period isdetermined, and the accuracy of light rain and drizzle measurement is improved.