Area array rainfall micro-physical measuring instrument with self-cleaning function and control method thereof

Abstract

The invention relates to an area array rainfall micro-physical measuring instrument with a self-cleaning function and a control method of the area array rainfall micro-physical measuring instrument. The control method comprises the following steps: acquiring images shot by an area-array camera at intervals; judging whether rainfall occurs in the measured environment of the area array rainfall micro-physical measuring instrument or not according to the image; if it is judged that rainfall occurs, the cleaning assembly is controlled to conduct self-cleaning on the light-emitting face of the area array light source and a lens of the area array camera, and the area array light source and the area array camera are started to conduct rainfall measurement. Under the condition that rainfall occurs in the measured environment, the cleaning assembly is controlled to perform self-cleaning on the light-emitting surface of the area array light source and the lens of the area array camera and perform rainfall measurement work. The energy consumption of the area array rainfall micro-physical measuring instrument equipment in a non-rainfall period can be greatly reduced, and the light-emitting surface of the area array light source and the lens of the area array camera are self-cleaned during rainfall measurement, so that data obtained by rainfall measurement are more accurate; and reliable rainfall micro-physical data is provided for meteorological research and related application.

Description

Technical Field

[0001] The present invention relates to the technical field of particle measurement, and in particular to a planar array precipitation microphysical measuring instrument with a self-cleaning function and a control method thereof. Background Art

[0002] As a natural and extremely critical weather phenomenon, precipitation has an all-round and profound impact on the production and life of human society. Agricultural production is highly dependent on precipitation. Timely and appropriate precipitation is an important guarantee for the healthy growth of crops and the achievement of a good harvest. In the industrial field, precipitation conditions will affect the supply of water resources, which is in turn related to many industrial production links. In urban life, precipitation affects the smoothness of traffic, and heavy rains may cause urban waterlogging, causing serious interference to infrastructure and residents' lives. Because of the great significance of precipitation, in-depth research on it has always been a key topic in the field of meteorological science.

[0003] At present, the area array precipitation microphysical measurement technology plays a key role in the measurement of microphysical characteristic parameters of precipitation particles. The traditional area array precipitation microphysical measuring instrument is mainly based on optical detection. During use, the area array light source emits light to the camera. When there are no precipitation particles in the camera sampling space, the light intensity received by the camera does not change. When precipitation particles appear in the sampling space, the light beam of the light source is blocked and the light intensity at the corresponding position will be weakened. By further processing the collected images, the microphysical characteristics of precipitation particles can be analyzed.

[0004] However, the traditional area array precipitation microphysical measuring instrument has many defects in practical applications. On the one hand, the area array camera and the area array light source of the area array precipitation microphysical measuring instrument are exposed to the outdoor environment for a long time, and the light-emitting surface of the area array light source and the lens of the area array camera are easily contaminated with pollutants such as dust or aerosol particles; on the other hand, during precipitation, especially during heavy precipitation, precipitation may adhere to the light-emitting surface of the area array light source and the lens of the area array camera, making it impossible for the area array precipitation microphysical measuring instrument to accurately measure the precipitation in the measured area. Summary of the invention

[0005] An object of the present invention is to overcome at least one defect in the prior art and to provide a planar array precipitation microphysical measuring instrument with a self-cleaning function and a control method thereof.

[0006] A further object of the present invention is to use a fan to blow the light-emitting surface of the area array light source and the lens of the area array camera to clean possible contaminants.

[0007] Another further object of the present invention is to improve the accuracy of precipitation measurement by periodically cleaning the light emitting surface of the area array light source and the area array camera lens.

[0008] In particular, the present invention provides a control method for an area array precipitation microphysical measuring instrument, which includes: an area array light source for providing a pulsed high-frequency light source to an area to be measured, an area array camera for capturing an image of the area to be measured, and a cleaning component for cleaning the light-emitting surface of the area array light source and the lens of the area array camera, and the control method for the area array precipitation microphysical measuring instrument includes: collecting images captured by the area array camera at intervals; judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to the images; if it is determined that precipitation occurs, controlling the cleaning component to self-clean the light-emitting surface of the area array light source and the lens of the area array camera, and starting the area array light source and the area array camera to measure precipitation.

[0009] Optionally, the step of judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to the image includes: obtaining grayscale values ​​of two images taken continuously by the area array camera; and judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument by comparing the grayscale values.

[0010] Optionally, the step of comparing grayscale values ​​includes: subtracting the grayscale values ​​to obtain image grayscale differences, and generating a grayscale difference matrix based on the image grayscale differences; and judging whether precipitation occurs in the measured environment based on element values ​​in the grayscale difference matrix.

[0011] Optionally, the steps of controlling the cleaning component to self-clean the light-emitting surface of the array light source and the lens of the array camera, and starting the array light source and the array camera to perform precipitation measurement include: cyclically executing the self-cleaning step and the precipitation measurement step according to a set cycle, each set cycle including a self-cleaning period for self-cleaning, a measurement period for precipitation measurement, and a particle free sedimentation period between the self-cleaning period and the measurement period.

[0012] Optionally, after the step of measuring precipitation, the method further includes: adjusting the duration of the self-cleaning period according to the measured precipitation amount, so that the duration of the self-cleaning period increases accordingly as the precipitation amount increases.

[0013] Optionally, the cleaning component includes: a first fan for blowing airflow toward the light-emitting surface of the area array light source and a second fan for blowing airflow toward the lens of the area array camera; the step of controlling the cleaning component to self-clean the light-emitting surface of the area array light source and the lens of the area array camera includes: controlling the first fan and the second fan to blow the light-emitting surface of the area array light source and the lens of the area array camera.

[0014] Optionally, the cleaning component also includes: a heating device for providing hot air to the first fan and a lens heating film for covering the surface of the area array camera lens; when the precipitation is greater than or equal to a preset precipitation threshold, the step of controlling the cleaning component to self-clean the light-emitting surface of the area array light source and the area array camera lens also includes: operating the heating device and the lens heating film, and controlling the first fan and the second fan to blow the light-emitting surface of the area array light source and the area array camera lens.

[0015] In particular, the present invention provides an area array precipitation microphysical measuring instrument, comprising: a control device, the control device comprising a memory, a processor and a computer program stored in the memory, the processor executes the computer program to implement the steps of a control method of the area array precipitation microphysical measuring instrument; an area array light source, configured to provide a pulsed high-frequency light source to a region to be measured; an area array camera, configured to capture an image of the region to be measured; and a cleaning component, configured to clean the light-emitting surface of the area array light source and the lens of the area array camera.

[0016] Optionally, the cleaning component includes: a first fan for blowing airflow toward the light-emitting surface of the area array light source; a second fan for blowing airflow toward the lens of the area array camera; a heating device for providing hot air to the first fan; and a lens heating film for covering the surface of the lens of the area array camera.

[0017] Optionally, the area array camera lens is a telecentric lens.

[0018] The control method of the area array precipitation microphysical measuring instrument provided by the present invention first collects images taken by the area array camera at intervals; then judges whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument based on the images; if it is judged that precipitation occurs, controls the cleaning component to self-clean the luminous surface of the area array light source and the lens of the area array camera, and starts the area array light source and the area array camera to measure precipitation. The method first judges whether precipitation occurs in the measured environment before measuring precipitation. When precipitation occurs in the measured environment, the cleaning component self-cleans the luminous surface of the area array light source and the lens of the area array camera and performs precipitation measurement. The energy consumption of the area array precipitation microphysical measuring instrument equipment in the non-precipitation period can be greatly reduced, and the luminous surface of the area array light source and the lens of the area array camera are also self-cleaned when measuring precipitation, which can make the data obtained by precipitation measurement more accurate, and timely provide reliable precipitation microphysical data for meteorological research and related applications.

[0019] Furthermore, the control method of the area array precipitation microphysical measuring instrument of the present invention can more accurately improve the accuracy of whether precipitation occurs by obtaining the grayscale values ​​of two images continuously taken by the area array camera and determining whether precipitation occurs in the measured environment through a grayscale difference matrix generated by the image grayscale difference.

[0020] Furthermore, the control method of the area array precipitation microphysical measuring instrument of the present invention also takes into account that the self-cleaning of the light-emitting surface of the area array light source and the lens of the area array camera during precipitation may affect the natural physical state of precipitation particles in the measured environment. The self-cleaning period, the measurement period for precipitation measurement, and the particle free sedimentation period between the self-cleaning period and the measurement period are cyclically executed. The self-cleaning requirements of the light-emitting surface of the area array light source and the lens of the area array camera can be met; and a period of free sedimentation can be reserved for the particles, which reduces the impact of the self-cleaning process on the precipitation particles and makes the measurement results more accurate.

[0021] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings: Figure 1 This is a connection diagram of a planar array precipitation microphysical measuring instrument according to an embodiment of the present invention; Figure 2 is a schematic diagram of a surface array precipitation microphysical measuring instrument according to an embodiment of the present invention; Figure 3 is a schematic diagram of a planar array light source according to an embodiment of the present invention; Figure 4 is a schematic diagram of an area array camera according to an embodiment of the present invention; Figure 5 is a flow chart of a control method of a planar array precipitation microphysical measuring instrument according to an embodiment of the present invention; Figure 6 It is a flow chart of the steps of judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to an image according to one embodiment of the present invention; Figure 7 is a flow chart of executing a self-cleaning step and a precipitation measurement step cyclically according to a set period according to another embodiment of the present invention; Figure 8 is a schematic diagram of a control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] It should be understood by those skilled in the art that the embodiments described below are only some embodiments of the present invention, rather than all embodiments of the present invention, and these embodiments are intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should still fall within the protection scope of the present invention.

[0024] It should be noted that the logic and / or steps represented in the flowchart or described in other ways herein can be considered as a sequenced list of executable instructions for implementing logical functions, which can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or equipment (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or equipment and execute instructions), or used in combination with these instruction execution systems, devices or equipment.

[0025] This embodiment provides a surface array precipitation microphysical measuring instrument, Figure 1 The figure is a connection diagram of an array precipitation microphysical measuring instrument using an embodiment of the present invention, which generally includes a control device 100, an array light source 200, an array camera 300, and a cleaning component. The control device 100 is used to control the array precipitation microphysical measuring instrument to perform self-cleaning and precipitation measurement, and is used for time synchronization and exposure control of the array light source 200 and the array camera 300, as well as switch control of the array light source 200 or the array camera 300.

[0026] The area array light source 200 is used to provide a pulsed high-frequency light source to the measured environment 400 and the area array camera 300. The area array camera 300 is used to capture images of the measured environment 400. In some embodiments, the area array camera 300 can use a high-frame rate area array camera 300 to ensure the image capture quality. When there are a lot of pollutants such as dust or aerosol particles in the measured environment 400 or when the precipitation is large, the first fan 210 blows away the pollutants or precipitation droplets on the light-emitting surface of the area array light source 200, and the second fan 310 blows away the pollutants or precipitation droplets on the lens of the area array camera 300.

[0027] Considering that it is not easy to clean the light-emitting surface of the array light source 200 and the lens of the array camera 300 only by relying on the first fan 210 and the second fan 310 when the precipitation is large or the temperature is low, the array precipitation microphysical measuring instrument of this embodiment is also provided with a heating device 220 and a lens heating film 330, wherein the heating device 220 is arranged on one side of the array light source 200 and is used to provide hot air to the first fan 210; the lens heating film 330 covers the surface of the lens of the array camera 300 and is used to heat the surface of the lens of the array camera 300. The airflow blown by the first fan 210 is heated by the heating device 220. And the surface of the lens of the array camera 300 is heated by the lens heating film 330, so that the water droplets or snow particles covered on the light-emitting surface of the array light source 200 and the lens of the array camera 300 can be melted more quickly, thereby achieving comprehensive cleaning of the light-emitting surface of the array light source 200 and the lens of the array camera 300, so that the precipitation measurement result is more accurate. In addition, since the lens of the area array camera 300 is a precision device, it is easy for the lens to be damaged or scratched in the use environment. Covering the lens heating film 330 on the surface of the lens of the area array camera 300 can also play a certain protective role and avoid damage or injury to the lens caused by harsh external environment.

[0028] In some embodiments, considering that the edge of the lens heating film 330 is in an alternating hot and cold environment under low temperature conditions, condensation may occur on the edge of the lens heating film 330, and the condensation may block the lens, resulting in inaccurate precipitation measurement results. In view of this phenomenon, a lens heating device 320 can be set between the second fan 310 and the lens of the area array camera 300. The lens heating device 320 can heat the air near the lens of the area array camera 300, and through the blowing action of the second fan 310, a hot air flow can be formed on the surface of the lens of the area array camera 300 to avoid possible condensation. The accuracy of precipitation measurement is further improved.

[0029] Figure 2 1 is a schematic diagram of a planar array precipitation microphysical measuring instrument according to an embodiment of the present invention. During the operation of the planar array precipitation microphysical measuring instrument, the control device 100 controls the planar array light source 200 to emit light, and the light is directed to the measured environment 400, so that the planar array camera 300 can capture images of the measured environment 400. In order to prevent pollutants or precipitation particles from blocking the planar array light source 200 or the planar array camera 300, a first fan 210 and a second fan 310 can be respectively arranged at the light-emitting surface of the planar array light source 200 and at the lens of the planar array camera 300. The first fan 210 and the second fan 310 can blow the light-emitting surface of the planar array light source 200 and the lens of the planar array camera 300 during operation, thereby avoiding the interference of pollutants or precipitation particles on the measurement work during the precipitation measurement process and improving the measurement accuracy.

[0030] Figure 3 2 is a schematic diagram of a planar array light source 200 according to an embodiment of the present invention. The first fan 210 can be arranged at one side of the planar array light source 200. The planar array light source 200 is blown laterally by the first fan 210 to clean the light-emitting surface of the planar array light source 200. A heating device 220 can also be arranged between the planar array light source 200 and the first fan 210. The heating device 220 can heat the air near the planar array light source 200. The hot air can form a hot air flow blowing toward the planar array light source 200 in cooperation with the first fan 210. Compared with the method of using only the first fan 210 to clean the planar array light source 200, the first fan 210 and the heating device 220 can be used to more thoroughly clean the surface of the planar array light source 200, thereby improving the measurement accuracy of precipitation measurement.

[0031] Figure 4 3 is a schematic diagram of an area array camera 300 according to an embodiment of the present invention. The second fan 310 can be arranged at one side of the area array camera 300. The second fan 310 can blow the area array camera 300 horizontally to clean the lens of the area array camera 300. A lens heating film 330 can also be covered on the surface of the lens of the area array camera 300. The lens heating film 330 can not only heat the precipitation particles dripping on the lens heating film 330 to achieve the purpose of cleaning, but also protect the lens of the area array camera 300 from being damaged or damaged. In some embodiments, a lens heating device 320 can also be arranged between the area array camera 300 and the second fan 310. The lens heating device 320 can heat the air near the area array camera 300. The hot air can cooperate with the second fan 310 to form a hot air flow blowing toward the area array camera 300. The hot air flow can blow toward the lens to avoid condensation at the junction of the lens heating film 330 and the lens. Compared with the method of using only the second fan 310 to clean the area array camera 300, the use of the second fan 310, the lens heating film 330 and the lens heating device 320 in cooperation with each other can more thoroughly clean the lens of the area array camera 300. In some embodiments, the lens heating device 320 can be set to a shape that is compatible with the shape of the lens of the area array camera 300 and the shape of the lens heating film 330. For example, the lens of the area array camera 300 is circular, and the lens heating film 330 is a circular shape that is compatible with the lens of the area array camera 300. The lens heating device 320 can be set to a semi-arc shape that is compatible with the circular lens, so that the hot air generated by the lens heating device 320 when it is running can fully blow the surface of the lens of the area array camera 300 and the lens heating film 330. The measurement accuracy during the precipitation measurement process is improved.

[0032] In some optional embodiments, the cleaning component may include a first fan 210, a second fan 310, a heating device 220, and a lens heating device 320. The first fan 210 blows airflow toward the light-emitting surface of the area array light source 200 to clean pollutants or precipitation particles attached to the light-emitting surface of the area array light source 200, and the second fan 310 blows airflow toward the lens of the area array camera 300 to clean pollutants or precipitation particles attached to the lens of the area array camera 300. Further, when the blowing action of the first fan 210 and the second fan 310 is insufficient to remove pollutants or precipitation particles attached to the light-emitting surface of the area array light source 200 and the lens of the area array camera 300, the heating device 220 may be provided on one side of the light-emitting surface of the area array light source 200, and a lens heating film 330 may be covered on the surface of the lens of the area array camera 300, or a lens heating device may be further provided. The light-emitting surface of the area array light source 200 and the lens of the area array camera 300 can be cleaned more thoroughly, thereby improving the measurement accuracy of the area array precipitation microphysical measuring instrument during precipitation measurement.

[0033] In some other optional embodiments, a telecentric lens may be used as the lens of the area array camera 300. Using a telecentric lens can eliminate the perspective error of the camera and obtain an image with stable quality, further improving the measurement accuracy of precipitation measurement.

[0034] This embodiment also provides a control method for an area array precipitation microphysical measuring instrument, which controls the area array precipitation microphysical measuring instrument of the above embodiment to improve the measurement accuracy. Figure 5 1 is a flow chart of a control method of a planar array precipitation microphysical measuring instrument according to an embodiment of the present invention. The control method of the planar array precipitation microphysical measuring instrument at least includes the following steps S201 to S203.

[0035] Step S201, collecting images taken by the area array camera at intervals.

[0036] Step S202: judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to the image.

[0037] Step S203: if it is determined that precipitation occurs, control the cleaning component to self-clean the light-emitting surface of the area array light source and the lens of the area array camera, and start the area array light source and the area array camera to measure precipitation.

[0038] The inventors realize that although the area array camera can record the particle morphology in the measured environment space, many particles will cover the camera lens due to the influence of the ambient wind. On the one hand, particles such as snowflakes and raindrops will contaminate the camera lens under the action of the ambient wind and block the imaging of particles in the camera field of view; on the other hand, when the area array light source is blocked by snow, the area array light beam received by the camera is uneven, which will cause particle recognition errors. Therefore, by setting the area array camera to take an image of the measured environment once at a certain interval, by comparing two consecutive images, it can be known whether precipitation occurs in the measured environment. When it is determined that precipitation occurs in the measured environment, the cleaning component is controlled to clean the light-emitting surface of the area array light source and the lens of the area array camera, so that the area array light source can send out a pulsed high-frequency light source, and the area array camera can accurately collect the precipitation in the measured environment. Through the above method, the area array precipitation microphysical measuring instrument can accurately identify the time of precipitation, and control the cleaning component to clean the light-emitting surface of the area array light source and the lens of the area array camera to ensure the accuracy of precipitation measurement.

[0039] Furthermore, during the precipitation measurement process, precipitation itself will also block the light-emitting surface of the area array light source and the area array camera lens, resulting in inaccurate measurement results. The inventors further realized that precipitation measurement and self-cleaning can be performed alternately, so that the light-emitting surface of the area array light source and the area array camera lens can be kept clean for a relatively long time, reducing the adverse effects of precipitation itself on precipitation measurement.

[0040] In some optional embodiments, when judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument based on images, it is possible to judge whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument by comparing the grayscale values ​​of two consecutive images. Figure 6 1 is a flow chart of the steps of judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to an embodiment of the present invention according to an image; Figure 6 The step of determining whether precipitation occurs in the measured environment at least includes the following steps S301 to S303.

[0041] Step S301, obtaining the grayscale values ​​of two images taken continuously by the array camera. This is because the grayscale value is one of the most basic features of the image, which directly reflects the brightness information of the pixels in the image. In the images collected by the array camera, the presence or absence of precipitation particles will significantly affect the propagation and reception of light. When precipitation particles enter the sampling space, they will block or scatter the light, thereby changing the intensity of the light received by the camera. This change in light intensity will be directly reflected in the grayscale value of the image pixel. For example, after the precipitation particles block the light, the amount of light received by the pixels in the corresponding area will decrease, and the grayscale value will decrease. By comparing the changes in the grayscale values ​​of consecutive images, the light changes caused by precipitation particles can be keenly captured, and whether precipitation occurs can be judged based on the light changes. Moreover, compared with the complex multi-channel information such as red, green, and blue contained in the color image, the grayscale value is easier and more efficient to process. Image comparison analysis only needs to focus on a single grayscale channel data, which reduces the amount and complexity of data processing, and the control device can quickly calculate the difference between two consecutive images. This is crucial for the array precipitation microphysical measuring instrument that needs to judge the precipitation situation in real time and quickly. Completing a large number of image comparisons in a short period of time and promptly reflecting precipitation changes can buy time for subsequent cleaning and measurement work.

[0042] Step S302, subtracting the grayscale values ​​to obtain the image grayscale difference, and generating a grayscale difference matrix based on the image grayscale difference. Subtracting the grayscale values ​​of two images taken continuously to obtain the grayscale difference can more accurately know the current state of environmental change. In the process of analyzing the grayscale difference of the image, even slight changes in light can be clearly expressed through grayscale difference data. For example, if a very small amount of precipitation particles enter the measured environment, it is not easy to observe the slight light changes caused by it using general observation methods. However, the change in grayscale value will be clearly reflected in the grayscale difference. The detection capability of the array precipitation microphysical measuring instrument in the early stage of precipitation or when there are few precipitation particles is greatly improved, avoiding the omission of key precipitation information.

[0043] Step S303, judging whether precipitation occurs in the measured environment according to the element values ​​in the grayscale difference matrix. The element values ​​in the grayscale difference matrix can accurately reflect whether precipitation occurs in the measured environment. For example, when the elements in the grayscale difference matrix are all 0, it indicates that the grayscale values ​​of the two images taken continuously by the array camera are the same, that is, the measured environment has not changed. It can be concluded that no environmental change has occurred in the measured environment during the current period, and further indicates that precipitation has not occurred in the current environment. When a non-zero value appears in the grayscale difference matrix, it indicates that the grayscale values ​​of the two images taken continuously by the array camera are different, that is, the measured environment has changed, and precipitation may occur during the period. For another example, a threshold value of the grayscale difference matrix can be pre-set. When the value of the grayscale difference matrix of the two images taken continuously by the array camera is greater than the preset threshold value of the grayscale difference matrix, it is determined that precipitation occurs in the measured environment, otherwise it is determined that precipitation does not occur. By setting the grayscale difference threshold, some subtle interference that may exist in the natural environment can be eliminated, preventing the array precipitation microphysical measuring instrument from misjudging whether precipitation has occurred, thereby improving the accuracy of precipitation measurement and avoiding unnecessary energy waste.

[0044] In other optional embodiments, the self-cleaning can also be adjusted according to the value of the grayscale difference matrix. For example, when the value of the grayscale difference matrix is ​​small, it can indirectly reflect that the precipitation in the current measured environment is small. At this time, the cleaning of the light-emitting surface of the array light source and the lens of the array camera can be satisfied only by blowing with a fan. When the value of the grayscale difference matrix is ​​large, it can indirectly reflect that the precipitation in the current measured environment is large. At this time, the need for cleaning the light-emitting surface of the array light source and the lens of the array camera may not be satisfied by blowing with a fan alone. It is also necessary to operate a heating device so that the air near the light-emitting surface of the array light source and the lens of the array camera is heated, and the heated air is blown by the fan to form a hot air flow, which further strengthens the cleaning of the light-emitting surface of the array light source and the lens of the array camera, thereby making the precipitation measurement result more accurate.

[0045] In some optional embodiments, the inventors also realize that the self-cleaning process may affect the free settling of precipitation particles, resulting in inaccurate precipitation measurement results. A period of time may be allowed between the self-cleaning period and the precipitation measurement period to allow the precipitation particles to settle naturally. Figure 7 The flowchart of executing the self-cleaning step and the precipitation measurement step according to another embodiment of the present invention is shown in Figure 4. Executing the self-cleaning step and the precipitation measurement step according to the set cycle may include at least the following steps S401 to S403.

[0046] Step S401, performing a self-cleaning period.

[0047] Step S402, particle free sedimentation period.

[0048] Step S403, performing a measurement period for precipitation measurement.

[0049] In order to reduce the impact of the self-cleaning process on the free settling of precipitation particles, after the self-cleaning period, the precipitation particles can be given time to settle freely before the precipitation measurement period. Before measuring the measured environment, the precipitation particles in the measured environment area have been fully settled naturally. This not only achieves timely cleaning of the light-emitting surface of the array light source and the lens of the array camera, but also ensures that the precipitation particles during measurement are not affected.

[0050] In other optional embodiments, the duration of the self-cleaning period can also be adjusted according to the amount of precipitation measured, so that the duration of the self-cleaning period increases accordingly with the increase of precipitation. For example, when the current precipitation is large after measurement, it is judged that the impact of the current precipitation on the measurement will be correspondingly increased, and the length of the self-cleaning period can be increased to make the light-emitting surface of the array light source and the array camera lens fully cleaned before measurement. In some optional embodiments, it is also possible to increase the proportion of the self-cleaning period in the cycle to ensure that the light-emitting surface of the array light source and the array camera lens are fully cleaned before precipitation measurement. This design of adjusting the self-cleaning period according to the amount of precipitation has significant benefits. From the perspective of measurement accuracy, when the precipitation is large, more precipitation particles are attached to the light-emitting surface of the array light source and the array camera lens, which interferes with the propagation of light more. By extending the self-cleaning time, these interferences can be more thoroughly removed, ensuring the normal operation of the optical system, improving image clarity, and thus improving the accuracy of the array precipitation microphysical measuring instrument. From the perspective of data reliability, ensuring sufficient cleaning before measurement can avoid measurement errors caused by incomplete cleaning, provide more stable and reliable precipitation data for meteorological research, strongly support meteorological model construction and predictive analysis, and improve the quality and accuracy of meteorological measurements.

[0051] In some optional embodiments, the cleaning component includes a first fan for blowing airflow toward the light-emitting surface of the array light source and a second fan for blowing airflow toward the lens of the array camera. The step of controlling the cleaning component to self-clean the light-emitting surface of the array light source and the lens of the array camera includes controlling the first fan and the second fan to blow the light-emitting surface of the array light source and the lens of the array camera. The inventors realize that although the array camera can record the particle morphology in the measured environment space, due to the influence of the ambient wind, many pollutant particles will cover the lens of the array camera and the light-emitting surface of the array light source. By arranging the first fan and the second fan on the sides of the light-emitting surface of the array light source and the lens of the array camera, the first fan and the second fan can be used to blow the light-emitting surface of the array light source and the lens of the array camera respectively, so that the pollutants or precipitation particles covering the light-emitting surface and the lens are blown away, thereby ensuring the accuracy of precipitation measurement.

[0052] In other optional embodiments, the blowing of the first fan and the second fan alone may not be enough to clean the luminous surface of the array light source and the lens of the array camera. For example, in a low temperature environment, precipitation particles such as snowflakes or raindrops may freeze on the luminous surface and the lens. At this time, the blowing of the first fan and the second fan alone is not enough to clean the luminous surface and the lens. Therefore, the cleaning component may also include a heating device for providing hot air to the first fan and a lens heating film for covering the surface of the lens of the array camera. When the precipitation is greater than or equal to the preset precipitation threshold, the step of controlling the cleaning component to self-clean the luminous surface of the array light source and the lens of the array camera also includes running the heating device and the lens heating film, controlling the first fan to blow hot air to the luminous surface of the array light source, and controlling the second fan to blow the surface of the lens heating film. Through the blowing of the hot air flow, the pollutants on the luminous surface and the lens can be more thoroughly removed, ensuring clear imaging of the optical system and improving measurement accuracy.

[0053] The flow chart provided by the present embodiment is not intended to indicate that the operation of the method will be performed in any particular order, or that all operations of the method are included in all every case. In addition, the method may include additional operations. Within the scope of the technical thinking provided by the present embodiment method, additional changes may be made to the above method.

[0054] It should be understood that in some embodiments, each part can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system.

[0055] This embodiment also provides a control device 100 . Figure 8 1 is a schematic diagram of a control device according to an embodiment of the present invention. The control device 100 includes a computer program 11, and when the computer program 11 is executed by the processor 32, the steps of any of the above control methods of the array precipitation microphysical measuring instrument are implemented.

[0056] The computer program 11 for performing the operation of the present invention may be an assembly instruction, an instruction set architecture (ISA) instruction, a machine instruction, a machine-related instruction, a microcode, a firmware instruction, a state setting data, a configuration data of an integrated circuit, or a source code or an object code written in any combination of one or more programming languages ​​and process programming languages. The computer program 11 may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer through any type of network (including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider through the Internet). In some embodiments, in order to perform various aspects of the present invention, an electronic circuit including, for example, a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA) may execute computer-readable program instructions by utilizing the state information of the computer-readable program instructions to personalize the electronic circuit.

[0057] The control device 100 may be, for example, a server, a desktop computer, a notebook computer, a tablet computer, or a smart phone. In some examples, the control device 100 may be a cloud computing node. The control device 100 may be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Typically, a program module may include routines, programs, object programs, components, logic, data structures, etc. that perform specific tasks or implement specific abstract data types. The control device 100 may be implemented in a distributed cloud computing environment where remote processing devices linked via a communication network perform tasks. In a distributed cloud computing environment, program modules may be located on a local or remote computing system storage medium including a storage device.

[0058] The control device 100 may include a processor 32 adapted to execute stored instructions, and a memory 31 providing temporary storage space for the operation of instructions during operation. The processor 32 may be a single-core processor, a multi-core processor, a computing cluster, or any number of other configurations. The memory 31 may include a random access memory (RAM), a read-only memory, a flash memory, or any other suitable storage system.

[0059] The control device 100 may also include a network adapter / interface and an input / output (I / O) interface. The I / O interface allows input and output of data with external devices that may be connected to the computer device. The network adapter / interface may provide communication between the computer device and a network, which is typically shown as a communication network.

[0060] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A control method for a surface array precipitation microphysical measuring instrument, characterized in that: The area array precipitation microphysical measuring instrument comprises: an area array light source for providing a pulsed high-frequency light source to the area to be measured, an area array camera for taking an image of the area to be measured, and a cleaning component for cleaning the light-emitting surface of the area array light source and the lens of the area array camera, and the control method comprises: collecting images taken by the area array camera at intervals; Judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to the image; If it is determined that precipitation occurs, the cleaning component is controlled to self-clean the light-emitting surface of the area array light source and the lens of the area array camera, and the area array light source and the area array camera are started to measure precipitation.

2. The control method according to claim 1, characterized in that: The step of judging whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument according to the image comprises: Obtaining grayscale values ​​of two images taken continuously by the area array camera; By comparing the grayscale values, it is determined whether precipitation occurs in the measured environment of the area array precipitation microphysical measuring instrument.

3. The control method according to claim 2, characterized in that: The step of comparing the grayscale values ​​comprises: Subtracting the grayscale values ​​to obtain image grayscale differences, and generating a grayscale difference matrix according to the image grayscale differences; Whether precipitation occurs in the measured environment is determined according to the element values ​​in the grayscale difference matrix.

4. The control method according to claim 1, characterized in that: The steps of controlling the cleaning component to self-clean the light emitting surface of the area array light source and the area array camera lens, and starting the area array light source and the area array camera to perform precipitation measurement include: The self-cleaning step and the precipitation measurement step are cyclically performed according to a set cycle, and each of the set cycles includes a self-cleaning period for performing the self-cleaning, a measurement period for performing the precipitation measurement, and a particle free sedimentation period between the self-cleaning period and the measurement period.

5. The control method according to claim 4, characterized in that: The steps for taking precipitation measurements also include: The duration of the self-cleaning period is adjusted according to the measured amount of precipitation, so that the duration of the self-cleaning period increases accordingly as the amount of precipitation increases.

6. The control method according to claim 5, characterized in that: The cleaning component comprises: a first fan for blowing airflow toward the light-emitting surface of the area array light source and a second fan for blowing airflow toward the lens of the area array camera; The step of controlling the cleaning component to self-clean the light emitting surface of the area array light source and the area array camera lens comprises: The first fan and the second fan are controlled to blow the light-emitting surface of the area array light source and the lens of the area array camera.

7. The control method according to claim 6, characterized in that: The cleaning assembly further comprises: a heating device for providing hot air to the first blower and a lens heating film for covering the surface of the area array camera lens; When the precipitation is greater than or equal to a preset precipitation threshold, the step of controlling the cleaning component to self-clean the light-emitting surface of the area array light source and the area array camera lens further includes: The heating device and the lens heating film are operated, and the first fan and the second fan are controlled to blow the light-emitting surface of the area array light source and the area array camera lens.

8. A surface array precipitation microphysical measuring instrument, comprising: A control device, the control device comprising a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the control method of the area array precipitation microphysical measuring instrument according to any one of claims 1 to 7; An array light source configured to provide a pulsed high-frequency light source to the area to be measured; An area array camera is configured to capture an image of the area to be measured; A cleaning component is configured to clean the light emitting surface of the area array light source and the area array camera lens.

9. The area array precipitation microphysical measuring instrument according to claim 8, characterized in that: The cleaning component comprises: A first fan, used for blowing airflow toward the light-emitting surface of the planar array light source; A second fan, used for blowing airflow toward the area array camera lens; A heating device, used to provide hot air to the first fan; A lens heating film is used to cover the surface of the area array camera lens.

10. The area array precipitation microphysical measuring instrument according to claim 8, characterized in that: The area array camera lens is a telecentric lens.

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