CN113393352A - Smart city system based on digital twin technology - Google Patents
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Abstract
The invention provides a smart city system based on a digital twin technology, which comprises: the system comprises a plurality of data acquisition terminals, a plurality of data acquisition terminals and a plurality of data processing terminals, wherein the data acquisition terminals are used for acquiring data information of a city; the management platform is in communication connection with the data acquisition terminal respectively and is used for processing the data information and inputting the processed data information into a preset three-dimensional model to form a visual three-dimensional image; and the plurality of monitoring terminals are respectively in communication connection with the management platform and are used for receiving the operation instruction of the user and sending the operation instruction to the management platform, and acquiring and displaying the three-dimensional image corresponding to the operation instruction in the management platform. The intelligent city system based on the digital twin technology realizes digital management and control of cities and high-efficiency management.
Description
Technical Field
The invention relates to the technical field of smart cities, in particular to a smart city system based on a digital twin technology.
Background
At present, the operation of each part in the traditional city still depends on manpower, and the stable and safe operation of the city is realized through the respective employment of each industry. Even if individual industries rely on modern information technology, the management efficiency is improved; however, there is still a problem of low management efficiency.
Disclosure of Invention
One of the purposes of the invention is to provide a smart city system based on a digital twin technology, which realizes digital management and control of cities and high-efficiency management.
The embodiment of the invention provides a smart city system based on a digital twin technology, which comprises:
the system comprises a plurality of data acquisition terminals, a plurality of data acquisition terminals and a plurality of data processing terminals, wherein the data acquisition terminals are used for acquiring data information of a city;
the management platform is in communication connection with the data acquisition terminal respectively and is used for processing the data information and inputting the processed data information into a preset three-dimensional model to form a visual three-dimensional image;
and the plurality of monitoring terminals are respectively in communication connection with the management platform and are used for receiving the operation instruction of the user and sending the operation instruction to the management platform, and acquiring and displaying the three-dimensional image corresponding to the operation instruction in the management platform.
Preferably, the data acquisition terminal includes:
the system comprises a plurality of flow sensors, a water supply pipeline and a control system, wherein the flow sensors are respectively arranged at each preset first position of the urban water supply pipeline and used for detecting the flow of water flowing through the preset position in the water supply pipeline;
the pressure sensors are respectively arranged at each preset second position of the urban water supply pipeline and used for detecting the pressure value of the water supply pipeline at the second position;
the water quality sensors are respectively arranged at each preset third position of the urban water supply pipeline and used for detecting water quality parameters of the water supply pipeline at the third position;
the management platform performs the following operations:
obtaining laying information of an urban water supply pipeline;
analyzing the laying information, and constructing a three-dimensional pipeline in a preset urban virtual space;
mapping the flow value to a three-dimensional pipeline side based on the first position;
mapping the pressure value to the three-dimensional pipeline side based on the second position;
mapping the water quality parameter to the side of the three-dimensional pipeline based on the third position;
determining the flow velocity of water on each pipeline of the three-dimensional pipeline based on the first position, the flow and the pipe diameter of the urban water supply pipeline;
determining parameters of an icon for marking the flow rate on the three-dimensional pipeline based on the flow rate;
determining the pressure condition of water on each pipeline of the three-dimensional pipeline based on the pressure value, the second position and a preset second position and pipeline corresponding table;
determining a filling pattern of the three-dimensional pipeline based on the pressure condition;
determining the water quality level of water on each pipeline of the three-dimensional pipeline based on the water quality parameter, a preset water quality rating table, a third position and a preset third position and pipeline corresponding table;
and determining the filling color of the three-dimensional pipeline based on the water quality grade.
Preferably, the management platform further performs the following operations:
analyzing the operation instruction, and determining the position of a display window corresponding to the monitoring terminal in the city virtual space and the display attribute of the display window; wherein the display attributes include: the display vector of each display point, the size of a display window and the display resolution of the display window;
determining a display area within the display window based on the size of the display window and the display vector;
mapping the three-dimensional pipeline in the display area to a display plane to form a display picture;
determining the number of the image number of the pipelines with unit length of each pipeline of the three-dimensional pipelines in the display picture based on the display resolution;
when the number is smaller than a preset first threshold value, only displaying the filling color of the corresponding pipeline;
when the number is greater than or equal to the first threshold value and less than a preset second threshold value, only the filling color and the filling pattern of the corresponding pipeline are displayed;
and when the number is larger than or equal to a second threshold value, displaying the filling color, the filling pattern and the icon of the corresponding pipeline.
Preferably, the icon includes: a graph in which line segments with arrows and circular points are alternately displayed;
based on the flow rate, determining parameters of an icon for marking the flow rate on the three-dimensional pipeline, wherein the parameters comprise:
based on the flow rate, the spacing between the various arrowed line segments in the icon is determined, and is calculated as follows:
Li＝L0-L1μ1Vi；
wherein L isiIntervals among line segments with arrows in the icon corresponding to the ith segment of pipeline are set; l is0Is a preset initial interval value; l is1Is a preset correction interval value; viThe flow rate is corresponding to the ith section of pipeline; mu.s1The relationship coefficient of the preset flow velocity and the interval correction coefficient is set;
and/or the presence of a gas in the gas,
and determining the ratio of the arrow of each arrowed line segment in the icon to the line segment based on the flow rate, wherein the calculation formula of the ratio is as follows:
ηi＝η0-η1μ2Vi；
wherein eta isiThe ratio of the arrow to the line segment of each line segment with the arrow in the icon corresponding to the ith pipeline is obtained; eta0Is a preset initial ratio; eta1Is a preset correction ratio; viThe flow rate is corresponding to the ith section of pipeline; mu.s2The relation coefficient of the preset flow velocity and the correction ratio coefficient is obtained;
and/or the presence of a gas in the gas,
acquiring historical data corresponding to the flow rate, and determining the maximum value and the average value of the historical flow rate;
calculating a first difference value between the flow rate and the maximum value, inquiring a preset color configuration table based on the first difference value, and determining the color of a line segment with an arrow and/or a circular point;
calculating a second difference value between the flow velocity and the average value, inquiring a preset ratio table of the diameter of the circular point and the width of the line segment with the arrow head based on the second difference value, and determining the ratio of the diameter of the circular point and the width of the line segment with the arrow head;
acquiring the number of image points of a pipeline with unit length, inquiring a preset width configuration table of a line segment with an arrow, and determining the width of the line segment with the arrow;
and/or the presence of a gas in the gas,
based on the flow velocity, a preset graph moving velocity table is inquired, and the moving velocity of the graph in the area where the graph in the line segment with the arrow and the circular point is located in the graph is determined.
Preferably, the data acquisition terminal includes:
the video acquisition equipment is respectively arranged at each preset fourth position of the city and used for acquiring video information at the fourth position;
the management platform performs the following operations:
acquiring video information of each fourth position through video acquisition equipment;
mapping the view screen information into the three-dimensional city model based on the fourth position;
when a video monitoring access request of a monitoring terminal is received, acquiring the position of a monitoring window of the monitoring terminal in a three-dimensional model of a city and a monitoring area range corresponding to the monitoring window;
determining a visual monitoring picture based on the position of the monitoring window in the city three-dimensional model and the monitoring area range corresponding to the monitoring window;
acquiring parameters of the visual monitoring picture, and determining the number of fourth positions in the visual monitoring picture;
when the number of the fourth positions in the visual monitoring picture is one and the parameter meets a preset first condition, playing the video information in real time by adopting the floating window in the visual monitoring picture, and marking the floating window to the corresponding fourth position;
when the number of the fourth positions in the visual monitoring picture is two and the parameter meets a preset second condition, respectively playing the real-time video information by adopting two floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is three and the parameter meets a preset third condition, respectively playing the real-time video information by adopting three floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is four and the parameter meets a preset fourth condition, respectively playing the real-time video information by adopting four suspension windows in the visual monitoring picture, and marking the suspension windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is five and the parameters meet a preset fifth condition, respectively playing the real-time video information by adopting five floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
wherein the first condition comprises: the display ratio of the monitoring window is greater than or equal to a preset first threshold value; the display ratio is the ratio of the size of the monitoring window to the size of the model of the visual monitoring picture;
the second condition includes: the display ratio of the monitoring window is greater than or equal to a preset second threshold value;
the third condition includes: the display ratio of the monitoring window is greater than or equal to a preset third threshold value;
the fourth condition includes: the display ratio of the monitoring window is greater than or equal to a preset fourth threshold value;
the fifth condition includes: the display ratio of the monitoring window is greater than or equal to a preset fifth threshold;
the first threshold is equal to or greater than the second threshold, the third threshold is equal to or greater than the fourth threshold, and the fifth threshold is equal to or greater than the fourth threshold.
Preferably, the management platform further performs the following operations:
and when the user clicks or places the indication arrow on the floating window, performing carousel on the pictures collected by the cameras of the video collection equipment arranged at the fourth position corresponding to the floating window.
Preferably, the management platform further performs the following operations:
acquiring historical information of a historical watching video of a user;
analyzing the historical information to construct a user preference library;
based on the user preference library, determining the preference degree of the picture shot by each camera of the video acquisition equipment corresponding to each fourth position in the visual monitoring picture;
acquiring a picture shot by the camera with the highest preference as a picture played by the virtual floating window;
analyzing the historical information and constructing a user preference library, wherein the method comprises the following steps:
extracting characteristic values of pictures in the historical information;
calculating the picture similarity of pictures browsed by the user in any two pieces of historical information based on the characteristic values, wherein the calculation formula is as follows:
wherein HSD is picture similarity; n is the total number of the characteristic values; a isiThe value of the ith characteristic value of a picture browsed by a user in a piece of historical information; biThe value of the ith characteristic value of a picture browsed by a user in another piece of historical information;
classifying the historical information based on the picture similarity to obtain a plurality of preference groups;
calculating a representative value of each history information in each preference group, wherein the representative value calculation formula is as follows:
wherein P is a representative value; HSDjThe picture similarity of the historical information relative to other jth historical information; n is a constant, and is the total number of the historical information in the preference group minus one;
taking the history information with the largest representative value as a piece of preference data in a user preference library;
based on the user preference library, determining the preference degree of the picture shot by each camera of the video acquisition equipment corresponding to each fourth position in the visual monitoring picture; the method comprises the following steps:
acquiring pictures shot by each camera, extracting features, and acquiring a feature value to be judged;
and performing similarity calculation on the characteristic value to be judged and the characteristic values of the preference data in the user preference library, and taking the maximum value in the similarity as the preference.
Preferably, the management platform further performs the following operations:
acquiring an announcement application of the monitoring terminal for an accident at a fourth position;
acquiring first positioning information of a monitoring terminal; when the first positioning information is in the preset area range of the fourth position, accident notification is carried out through warning equipment arranged on the roadside;
when the first positioning information is not in the preset area range of the fourth position, sending inquiry to other monitoring terminals in the preset area range of the fourth position;
when the inquiry result shows that an accident occurs, accident notification is carried out through warning equipment arranged on the roadside;
wherein, carry out accident notification through the warning equipment who sets up on the roadside, include:
the LED display screen at the road opening before the accident position displays the accident position and the accident image, and/or the warning lamp arranged on the roadside in the area with the accident position as the center and the radius at the preset distance is red.
Preferably, the data acquisition terminal includes:
and the plurality of sound intensity detection devices are respectively arranged at the preset fifth positions of the city and used for acquiring the sound intensity at the fifth positions.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a smart city system based on digital twin technology according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides a smart city system based on a digital twin technology, as shown in fig. 1, comprising:
the system comprises a plurality of data acquisition terminals 1, a plurality of data acquisition terminals and a plurality of data processing terminals, wherein the data acquisition terminals are used for acquiring data information of a city;
the management platform 2 is respectively in communication connection with the data acquisition terminal 1 and is used for processing the data information and inputting the processed data information into a preset three-dimensional model to form a visual three-dimensional image;
and the monitoring terminals 3 are respectively in communication connection with the management platform 2 and used for receiving the operation instruction of the user, sending the operation instruction to the management platform 2, and acquiring and displaying the three-dimensional image corresponding to the operation instruction in the management platform 2.
The working principle and the beneficial effects of the technical scheme are as follows:
a user logs in the management platform by using the monitoring terminal to check the three-dimensional model formed by the urban buildings; the data required by the user are expressed on the three-dimensional model in an materialized and visualized mode, so that the user can visually check the corresponding data, and visualized monitoring is achieved; in addition, based on the implementation of three-dimensional materialized monitoring, a user can easily find out various running inconveniences of the city, and the user can conveniently improve the links of city running. The data acquisition terminal is used as a data base and can adopt data acquisition equipment such as image acquisition equipment, sound acquisition equipment, rainfall acquisition equipment, air quality acquisition equipment, water quality acquisition equipment and the like. The monitor terminal includes: the mobile phone, the tablet computer, the computer and the like can log in the electronic equipment of the management platform.
The intelligent city system based on the digital twin technology realizes digital management and control of cities and high-efficiency management.
In one embodiment, a data acquisition terminal includes:
the system comprises a plurality of flow sensors, a water supply pipeline and a control system, wherein the flow sensors are respectively arranged at each preset first position of the urban water supply pipeline and used for detecting the flow of water flowing through the preset position in the water supply pipeline;
the pressure sensors are respectively arranged at each preset second position of the urban water supply pipeline and used for detecting the pressure value of the water supply pipeline at the second position;
the water quality sensors are respectively arranged at each preset third position of the urban water supply pipeline and used for detecting water quality parameters of the water supply pipeline at the third position;
the management platform performs the following operations:
obtaining laying information of an urban water supply pipeline;
analyzing the laying information, and constructing a three-dimensional pipeline in a preset urban virtual space;
mapping the flow value to a three-dimensional pipeline side based on the first position;
mapping the pressure value to the three-dimensional pipeline side based on the second position;
mapping the water quality parameter to the side of the three-dimensional pipeline based on the third position;
determining the flow velocity of water on each pipeline of the three-dimensional pipeline based on the first position, the flow and the pipe diameter of the urban water supply pipeline;
determining parameters of an icon for marking the flow rate on the three-dimensional pipeline based on the flow rate;
determining the pressure condition of water on each pipeline of the three-dimensional pipeline based on the pressure value, the second position and a preset second position and pipeline corresponding table;
determining a filling pattern of the three-dimensional pipeline based on the pressure condition;
determining the water quality level of water on each pipeline of the three-dimensional pipeline based on the water quality parameter, a preset water quality rating table, a third position and a preset third position and pipeline corresponding table;
and determining the filling color of the three-dimensional pipeline based on the water quality grade.
The working principle and the beneficial effects of the technical scheme are as follows:
key positions of each urban water supply pipeline are controlled through sensors of flow, pressure, water quality and the like; the regulation and control of the urban water supply pipeline are realized through an electric control valve and water pump equipment which are connected to the pipeline of the management platform; representing the pressure condition as a filling pattern of the pipeline; for example, no lines are formed when the pressure is normal; gradually adding lines according to the increase of the pressure, and mainly carrying out pressure evaluation according to a preset pressure rating table; inquiring a preset filling pattern table according to the rating after pressure evaluation, and determining a filling pattern; the user only needs to observe the filling color, the filling pattern and the icon of the three-dimensional pipeline, the water supply pipeline can be monitored, and the monitoring efficiency is improved. When in specific analysis, the operations of turning and stretching the view can be carried out according to the user operation, and a reliable data base is provided for the user abnormal analysis.
In one embodiment, the management platform further performs the following operations:
analyzing the operation instruction, and determining the position of a display window corresponding to the monitoring terminal in the city virtual space and the display attribute of the display window; wherein the display attributes include: the display vector of each display point, the size of a display window and the display resolution of the display window;
determining a display area within the display window based on the size of the display window and the display vector;
mapping the three-dimensional pipeline in the display area to a display plane to form a display picture;
determining the number of the image number of the pipelines with unit length of each pipeline of the three-dimensional pipelines in the display picture based on the display resolution;
when the number is smaller than a preset first threshold value, only displaying the filling color of the corresponding pipeline;
when the number is greater than or equal to the first threshold value and less than a preset second threshold value, only the filling color and the filling pattern of the corresponding pipeline are displayed;
and when the number is larger than or equal to a second threshold value, displaying the filling color, the filling pattern and the icon of the corresponding pipeline.
The working principle and the beneficial effects of the technical scheme are as follows:
by associating the display of the three-dimensional pipeline with the attribute of the display window, more concise display is realized; when the number is smaller than the preset first threshold, the value of the first threshold can be 5, which indicates that the size of the pipeline displayed in the display window is very small, so that only the filling color is displayed; when the first threshold value is reached but the second threshold value is not reached, and the value of the second threshold value can be 20, the pipeline display area is enough to display the filling pattern; when the second threshold is reached, it may be displayed in its entirety. The mode of display can be determined more accurately with the number of pixels of the piping per unit length as a condition for display.
In one embodiment, the icon includes: a graph in which line segments with arrows and circular points are alternately displayed;
based on the flow rate, determining parameters of an icon for marking the flow rate on the three-dimensional pipeline, wherein the parameters comprise:
based on the flow rate, the spacing between the various arrowed line segments in the icon is determined, and is calculated as follows:
Li＝L0-L1μ1Vi；
wherein L isiIntervals among line segments with arrows in the icon corresponding to the ith segment of pipeline are set; l is0Is a preset initial interval value; l is1Is a preset correction interval value; viThe flow rate is corresponding to the ith section of pipeline; mu.s1The relationship coefficient of the preset flow velocity and the interval correction coefficient is set;
and/or the presence of a gas in the gas,
and determining the ratio of the arrow of each arrowed line segment in the icon to the line segment based on the flow rate, wherein the calculation formula of the ratio is as follows:
ηi＝η0-η1μ2Vi；
wherein eta isiThe ratio of the arrow to the line segment of each line segment with the arrow in the icon corresponding to the ith pipeline is obtained; eta0Is a preset initial ratio; eta1Is a preset correction ratio; viThe flow rate is corresponding to the ith section of pipeline; mu.s2The relation coefficient of the preset flow velocity and the correction ratio coefficient is obtained;
and/or the presence of a gas in the gas,
acquiring historical data corresponding to the flow rate, and determining the maximum value and the average value of the historical flow rate;
calculating a first difference value between the flow rate and the maximum value, inquiring a preset color configuration table based on the first difference value, and determining the color of a line segment with an arrow and/or a circular point;
calculating a second difference value between the flow velocity and the average value, inquiring a preset ratio table of the diameter of the circular point and the width of the line segment with the arrow head based on the second difference value, and determining the ratio of the diameter of the circular point and the width of the line segment with the arrow head;
acquiring the number of image points of a pipeline with unit length, inquiring a preset width configuration table of a line segment with an arrow, and determining the width of the line segment with the arrow;
and/or the presence of a gas in the gas,
based on the flow velocity, a preset graph moving velocity table is inquired, and the moving velocity of the graph in the area where the graph in the line segment with the arrow and the circular point is located in the graph is determined.
The working principle and the beneficial effects of the technical scheme are as follows:
correlating the flow rate to a graph movement speed; correlating the maximum value and the average value of the historical flow rate with the ratio of the color of the arrowed line segment and/or the circular point, the diameter of the circular point and the width of the arrowed line segment; and/or, correlating the flow rate to the arrow-to-line ratio of each arrowed line segment in the icon; and/or, correlating the flow rate to the spacing between the various arrowed line segments in the icon; the user can intuitively feel the difference of the flow rate on each pipeline and the difference of the flow rate and historical data, and the visual monitoring of the user is facilitated.
In one embodiment, a data acquisition terminal includes:
the video acquisition equipment is respectively arranged at each preset fourth position of the city and used for acquiring video information at the fourth position;
the management platform performs the following operations:
acquiring video information of each fourth position through video acquisition equipment;
mapping the view screen information into the three-dimensional city model based on the fourth position;
when a video monitoring access request of a monitoring terminal is received, acquiring the position of a monitoring window of the monitoring terminal in a three-dimensional model of a city and a monitoring area range corresponding to the monitoring window;
determining a visual monitoring picture based on the position of the monitoring window in the city three-dimensional model and the monitoring area range corresponding to the monitoring window;
acquiring parameters of the visual monitoring picture, and determining the number of fourth positions in the visual monitoring picture;
when the number of the fourth positions in the visual monitoring picture is one and the parameter meets a preset first condition, playing the video information in real time by adopting the floating window in the visual monitoring picture, and marking the floating window to the corresponding fourth position;
when the number of the fourth positions in the visual monitoring picture is two and the parameter meets a preset second condition, respectively playing the real-time video information by adopting two floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is three and the parameter meets a preset third condition, respectively playing the real-time video information by adopting three floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is four and the parameter meets a preset fourth condition, respectively playing the real-time video information by adopting four suspension windows in the visual monitoring picture, and marking the suspension windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is five and the parameters meet a preset fifth condition, respectively playing the real-time video information by adopting five floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
wherein the first condition comprises: the display ratio of the monitoring window is greater than or equal to a preset first threshold value; the display ratio is the ratio of the size of the monitoring window to the size of the model of the visual monitoring picture;
the second condition includes: the display ratio of the monitoring window is greater than or equal to a preset second threshold value;
the third condition includes: the display ratio of the monitoring window is greater than or equal to a preset third threshold value;
the fourth condition includes: the display ratio of the monitoring window is greater than or equal to a preset fourth threshold value;
the fifth condition includes: the display ratio of the monitoring window is greater than or equal to a preset fifth threshold;
the first threshold is equal to or greater than the second threshold, the third threshold is equal to or greater than the fourth threshold, and the fifth threshold is equal to or greater than the fourth threshold.
The working principle and the beneficial effects of the technical scheme are as follows:
video acquisition equipment is arranged at each key position in a city to acquire videos, and a user can perform video monitoring at a plurality of positions during visual monitoring of the three-dimensional model; the monitoring efficiency is improved; and according to the operation of the user, the monitoring window can be expanded and reduced; when the monitoring window is expanded or reduced, the monitoring window is associated with a fourth position in the monitoring area based on the first condition, the second condition, the third condition, the fourth condition and the fifth condition, and the real-time tracking switching of a displayed picture is realized when a user adjusts the monitoring window so as to adapt to the attribute of the current monitoring window; when only two suspension windows are arranged, the suspension windows can be placed on the upper portion and displayed in a left-right side-by-side mode, and a preset distance is reserved in the middle. When five suspension windows are arranged, the middle part is provided with one, and the upper part, the lower part, the left part and the right part are respectively provided with one; in addition, dragging of the floating window by the user can be received, so that the user can compare the monitoring pictures at the two fourth positions conveniently; when the floating window is dragged, the floating window can be dragged across the visual field, namely when the fourth position of the floating window does not exist in the current monitoring window, the floating window can be displayed as long as the user drags the floating window into the monitoring window; in addition, the time difference of the display pictures of the monitoring window can be set; and realizing time-staggered comparison.
In one embodiment, the management platform further performs the following operations:
and when the user clicks or places the indication arrow on the floating window, performing carousel on the pictures collected by the cameras of the video collection equipment arranged at the fourth position corresponding to the floating window.
The working principle and the beneficial effects of the technical scheme are as follows:
and (4) performing carousel in the floating window display stage, and determining whether the monitoring picture is the wanted monitoring picture by watching the carousel by a user.
In one embodiment, the management platform further performs the following operations:
acquiring historical information of a historical watching video of a user;
analyzing the historical information to construct a user preference library;
based on the user preference library, determining the preference degree of the picture shot by each camera of the video acquisition equipment corresponding to each fourth position in the visual monitoring picture;
acquiring a picture shot by the camera with the highest preference as a picture played by the virtual floating window;
analyzing the historical information and constructing a user preference library, wherein the method comprises the following steps:
extracting characteristic values of pictures in the historical information;
calculating the picture similarity of pictures browsed by the user in any two pieces of historical information based on the characteristic values, wherein the calculation formula is as follows:
wherein HSD is picture similarity; n is the total number of the characteristic values; a isiThe value of the ith characteristic value of a picture browsed by a user in a piece of historical information; biThe value of the ith characteristic value of a picture browsed by a user in another piece of historical information;
classifying the historical information based on the picture similarity to obtain a plurality of preference groups;
calculating a representative value of each history information in each preference group, wherein the representative value calculation formula is as follows:
wherein P is a representative value; HSDjThe picture similarity of the historical information relative to other jth historical information; n is a constant, and is the total number of the historical information in the preference group minus one;
taking the history information with the largest representative value as a piece of preference data in a user preference library;
based on the user preference library, determining the preference degree of the picture shot by each camera of the video acquisition equipment corresponding to each fourth position in the visual monitoring picture; the method comprises the following steps:
acquiring pictures shot by each camera, extracting features, and acquiring a feature value to be judged;
and performing similarity calculation on the characteristic value to be judged and the characteristic values of the preference data in the user preference library, and taking the maximum value in the similarity as the preference.
The working principle and the beneficial effects of the technical scheme are as follows:
by analyzing the preference of the user and intelligently selecting the picture displayed by the floating window, the picture displayed by the floating window is closer to the preference of the user, so that the personalized monitoring requirement of the user is met.
In one embodiment, the management platform further performs the following operations:
acquiring an announcement application of the monitoring terminal for an accident at a fourth position;
acquiring first positioning information of a monitoring terminal; when the first positioning information is in the preset area range of the fourth position, accident notification is carried out through warning equipment arranged on the roadside;
when the first positioning information is not in the preset area range of the fourth position, sending inquiry to other monitoring terminals in the preset area range of the fourth position;
when the inquiry result shows that an accident occurs, accident notification is carried out through warning equipment arranged on the roadside;
wherein, carry out accident notification through the warning equipment who sets up on the roadside, include:
the LED display screen at the road opening before the accident position displays the accident position and the accident image, and/or the warning lamp arranged on the roadside in the area with the accident position as the center and the radius at the preset distance is red.
The working principle and the beneficial effects of the technical scheme are as follows:
when the notification link is established after the accident happens, except for the notification generated after the accident is automatically identified by the pictures collected by the video collecting equipment; when the notice is sent, vehicles passing through the accident position are mainly warned through warning equipment, an LED display screen at a road opening before the accident position can display the accident occurrence place and the accident occurrence picture, and/or warning lamps arranged on roadsides in an area with the accident occurrence position as a central radius at a preset distance are set to be red; to remind other vehicles and pedestrians to pay attention to avoiding and the like.
In one embodiment, a data acquisition terminal includes:
and the plurality of sound intensity detection devices are respectively arranged at the preset fifth positions of the city and used for acquiring the sound intensity at the fifth positions.
The working principle and the beneficial effects of the technical scheme are as follows:
and the sound source pollution problem of each fifth position is detected through the sound degree detection equipment, so that the effective monitoring of the city is realized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A smart city system based on digital twin technology, comprising:
the system comprises a plurality of data acquisition terminals, a plurality of data acquisition terminals and a plurality of data processing terminals, wherein the data acquisition terminals are used for acquiring data information of a city;
the management platform is respectively in communication connection with the data acquisition terminal and is used for processing the data information and inputting the processed data information into a preset three-dimensional model to form a visual three-dimensional image;
and the monitoring terminals are respectively in communication connection with the management platform and used for receiving an operation instruction of a user, sending the operation instruction to the management platform, and acquiring and displaying a three-dimensional image corresponding to the operation instruction in the management platform.
2. The smart city system based on digital twin technology as claimed in claim 1, wherein the data acquisition terminal comprises:
the system comprises a plurality of flow sensors, a water supply pipeline and a control system, wherein the flow sensors are respectively arranged at each preset first position of the urban water supply pipeline and used for detecting the flow of water flowing through the preset position in the water supply pipeline;
the system comprises a plurality of pressure sensors, a water supply pipeline and a control unit, wherein the pressure sensors are respectively arranged at each preset second position of the urban water supply pipeline and used for detecting the pressure value of the water supply pipeline at the second position;
the water quality sensors are respectively arranged at each preset third position of the urban water supply pipeline and used for detecting water quality parameters of the water supply pipeline at the third position;
the management platform performs the following operations:
obtaining laying information of an urban water supply pipeline;
analyzing the laying information, and constructing a three-dimensional pipeline in a preset urban virtual space;
mapping the flow value to the three-dimensional pipe-side based on the first location;
mapping the pressure value to the three-dimensional pipeline side based on the second position;
mapping the water quality parameter to the side of the three-dimensional pipeline based on the third position;
determining the flow velocity of water on each pipeline of the three-dimensional pipeline based on the first position, the flow and the pipe diameter of the urban water supply pipeline;
determining parameters of an icon labeling the flow velocity on the three-dimensional pipeline based on the flow velocity;
determining the pressure condition of water on each pipeline of the three-dimensional pipeline based on the pressure value, the second position and a preset second position and pipeline corresponding table;
determining a filling pattern of the three-dimensional pipeline based on the pressure condition;
determining the water quality level of water on each pipeline of the three-dimensional pipeline based on the water quality parameter, a preset water quality rating table, the third position and a preset third position and pipeline corresponding table;
and determining the filling color of the three-dimensional pipeline based on the water quality level.
3. The smart city system based on digital twin technology as claimed in claim 2, wherein the management platform further performs the following operations:
analyzing the operation instruction, and determining the position of a display window corresponding to the monitoring terminal in the city virtual space and the display attribute of the display window; wherein the display attributes include: the display vector of each display point, the size of a display window and the display resolution of the display window;
determining a display area within the display window based on the size of the display window and the display vector;
mapping the three-dimensional pipeline in the display area to a display plane to form a display picture;
determining the number of the image number points of the pipelines with unit length of each pipeline of the three-dimensional pipelines in the display picture based on the display resolution;
when the number is smaller than a preset first threshold value, only displaying the filling color of the corresponding pipeline;
when the number is greater than or equal to the first threshold value and smaller than a preset second threshold value, only displaying the filling color and the filling pattern of the corresponding pipeline;
and when the number is larger than or equal to the second threshold value, displaying the filling color, the filling pattern and the icon of the corresponding pipeline.
4. The smart city system based on digital twin technology as claimed in claim 2,
the icon includes: a graph in which line segments with arrows and circular points are alternately displayed;
the determining, based on the flow velocity, parameters of an icon labeling the flow velocity on the three-dimensional pipeline includes:
determining intervals between the line segments with the arrows in the icon based on the flow velocity, wherein the calculation formula of the intervals is as follows:
Li＝L0-L1μ1Vi；
wherein L isiThe interval between each line segment with an arrow in the icon corresponding to the ith pipeline is set; l is0Is a preset initial interval value; l is1Is a preset correction interval value; viThe flow rate corresponding to the pipeline at the ith section; mu.s1The relationship coefficient of the preset flow velocity and the interval correction coefficient is set;
and/or the presence of a gas in the gas,
determining the ratio of the arrow to the line segment of each arrowed line segment in the icon based on the flow rate, wherein the calculation formula of the ratio is as follows:
ηi＝η0-η1μ2Vi；
wherein eta isiThe ratio of the arrow to the line segment of each line segment with the arrow in the icon corresponding to the ith pipeline is obtained; eta0Is a preset initial ratio; eta1Is a preset correction ratio; viThe flow rate corresponding to the pipeline at the ith section; mu.s2The relation coefficient of the preset flow velocity and the correction ratio coefficient is obtained;
and/or the presence of a gas in the gas,
acquiring historical data corresponding to the flow rate, and determining the maximum value and the average value of the historical flow rate;
calculating a first difference value between the flow speed and the maximum value, inquiring a preset color configuration table based on the first difference value, and determining the line segment with the arrow and/or the color of the circular point;
calculating a second difference value of the flow speed and the average value, inquiring a preset ratio table of the diameter of the circular point and the width of the line segment with the arrow head based on the second difference value, and determining the ratio of the diameter of the circular point and the width of the line segment with the arrow head;
acquiring the number of image points of a pipeline with unit length, inquiring a preset width configuration table of a line segment with an arrow, and determining the width of the line segment with the arrow;
and/or the presence of a gas in the gas,
and inquiring a preset graph moving speed table based on the flow speed, and determining the moving speed of the area where the graph is located in the line segment and the circular point in the graph alternately displayed by the line segment with the arrow and the circular point.
5. The smart city system based on digital twin technology as claimed in claim 1, wherein the data acquisition terminal comprises:
the video acquisition equipment is respectively arranged at each preset fourth position of the city and used for acquiring video information at the fourth position;
the management platform performs the following operations:
acquiring video information of each fourth position through the video acquisition equipment;
mapping the view information into a three-dimensional model of the city based on the fourth location;
when a video monitoring access request of the monitoring terminal is received, acquiring the position of a monitoring window of the monitoring terminal in the city three-dimensional model and a monitoring area range corresponding to the monitoring window;
determining a visual monitoring picture based on the position of the monitoring window in the city three-dimensional model and the monitoring area range corresponding to the monitoring window;
acquiring parameters of the visual monitoring picture, and determining the number of the fourth positions in the visual monitoring picture;
when the number of the fourth positions in the visual monitoring picture is one and the parameter meets a preset first condition, playing the video information in real time by adopting a floating window in the visual monitoring picture, and marking the floating window to the corresponding fourth position;
when the number of the fourth positions in the visual monitoring picture is two and the parameter meets a preset second condition, respectively playing the video information in real time by adopting two floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is three and the parameter meets a preset third condition, playing the video information in real time by adopting three floating windows in the visual monitoring picture respectively, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is four and the parameter meets a preset fourth condition, playing the video information in real time by adopting four floating windows in the visual monitoring picture respectively, and marking the floating windows to the corresponding fourth positions;
when the number of the fourth positions in the visual monitoring picture is five and the parameter meets a preset fifth condition, respectively playing the video information in real time by adopting five floating windows in the visual monitoring picture, and marking the floating windows to the corresponding fourth positions;
wherein the first condition comprises: the display ratio of the monitoring window is greater than or equal to a preset first threshold value; the display ratio is the ratio of the size of the monitoring window to the size of the model of the visual monitoring picture;
the second condition includes: the display ratio of the monitoring window is greater than or equal to a preset second threshold value;
the third condition includes: the display ratio of the monitoring window is greater than or equal to a preset third threshold value;
the fourth condition includes: the display ratio of the monitoring window is greater than or equal to a preset fourth threshold value;
the fifth condition includes: the display ratio of the monitoring window is greater than or equal to a preset fifth threshold;
the first threshold is equal to or greater than the second threshold, the third threshold is equal to or greater than the fourth threshold, and the fifth threshold is equal to or greater than the fourth threshold.
6. The smart city system based on digital twin technology as claimed in claim 5, wherein the management platform further performs the following operations:
and when a user clicks or places an indication arrow on the floating window, performing carousel on pictures collected by each camera of the video collection equipment, which are arranged at the fourth position corresponding to the floating window.
7. The smart city system based on digital twin technology as claimed in claim 6, wherein the management platform further performs the following operations:
acquiring historical information of a historical watching video of the user;
analyzing the historical information to construct a user preference library;
based on the user preference library, determining the preference degree of pictures shot by each camera of the video acquisition equipment corresponding to each fourth position in the visual monitoring picture;
acquiring the picture shot by the camera with the maximum preference as the picture played by the virtual floating window;
wherein, the analyzing the historical information and constructing a user preference library comprises:
extracting characteristic values of pictures in the historical information;
calculating the picture similarity of pictures browsed by the user in any two pieces of historical information based on the characteristic values, wherein the calculation formula is as follows:
wherein HSD is the picture similarity; n is the total number of the characteristic values; a isiThe value of the ith characteristic value of a picture browsed by a user in one piece of history information is obtained; biThe value of the ith characteristic value of a picture browsed by a user in another piece of historical information;
classifying the historical information based on the picture similarity to obtain a plurality of preference groups;
calculating a representative value of each of the history information in each of the preference groups, the representative value calculation formula being as follows:
wherein P is the representative value; HSDjThe picture similarity of the historical information relative to other jth historical information is obtained; n is a constant, and is the total number of the historical information in the preference group minus one;
taking the history information with the maximum representative value as a piece of preference data in the user preference library;
determining the preference degree of pictures shot by each camera of the video acquisition equipment corresponding to each fourth position in the visual monitoring pictures based on the user preference library; the method comprises the following steps:
acquiring pictures shot by each camera, extracting features, and acquiring a feature value to be judged;
and calculating the similarity of the characteristic value to be judged and the characteristic value of each preference data in the user preference library, and taking the maximum value in the similarity as the preference.
8. The smart city system based on digital twin technology as claimed in claim 5, wherein the management platform further performs the following operations:
acquiring a notification application of the monitoring terminal for the accident at the fourth position;
acquiring first positioning information of the monitoring terminal; when the first positioning information is in the preset area range of the fourth position, accident notification is carried out through warning equipment arranged on the roadside;
when the first positioning information is not in the preset area range of the fourth position, sending a query to other monitoring terminals in the preset area range of the fourth position;
when the inquiry result shows that an accident occurs, accident notification is carried out through warning equipment arranged on the roadside;
wherein, carry out accident notification through the warning equipment who sets up on the roadside, include:
the LED display screen at the road opening before the accident position displays the accident position and the accident image, and/or the warning lamp arranged on the roadside in the area with the accident position as the center and the radius at the preset distance is red.
9. The smart city system based on digital twin technology as claimed in claim 1, wherein the data acquisition terminal comprises:
and the plurality of sound intensity detection devices are respectively arranged at the preset fifth positions of the city and are used for acquiring the sound intensity at the fifth positions.
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