Smart city intelligent environment monitoring device and method based on digital twinning

Abstract

The invention belongs to the technical field of environment monitoring, and particularly relates to a digital twinning-based smart city intelligent environment monitoring device and method.The device comprises a server and further comprises a sliding rail, a carrier plate, a stand column and a soil quality sensor, the sliding rail is horizontally fixed to the edge of a city river channel and located above the water surface, and the carrier plate is fixed to the server; the sliding rail is of a concave opening structure, a swing mechanism is arranged at the opening, a control cabinet is fixed above the sliding rail, a controller and a WIFI module in signal connection with the controller are fixed in the control cabinet, and the WIFI module is connected to a server through a signal base station; the carrier plate is arranged on the water surface of an urban river channel, the upper edge of the carrier plate is provided with a driving mechanism, and the method comprises the steps of S1, site selection, S2, model construction, S3, data acquisition, S4, range movement and S5, data statistics. According to the invention, the acquisition point location of each data can be intelligently changed in a wide range, water-land-air integrated data monitoring is realized, and the dynamic updating of a digital twin model is greatly facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental monitoring, and specifically relates to a smart city intelligent environmental monitoring device and method based on digital twins. Background Art

[0002] Smart city intelligent environmental monitoring is a comprehensive system that uses information technology, the Internet of Things, big data analysis and other means to conduct all-round, real-time and accurate monitoring and management of the urban environment. Urban environmental monitoring projects generally include air quality data, water quality data, soil data, noise data, etc. Multiple monitoring sensors are installed in locations that avoid crowds, and the collected data is sent to the server for aggregation.

[0003] Digital twins are a technical means of combining physical models with real-time sensor data for display. They can also run historical data comparisons to analyze the data change trends of physical entities and predict possible data nodes or declines in the future. This technology brings a certain degree of predictability to residents' lives and, as a guide for production and life, is conducive to the construction of smart cities.

[0004] The existing urban environmental monitoring often fixes a monitoring station in a designated area, and avoids crowded places. The sensors in the monitoring station are fixed at the current position, and the detection range is limited to the monitoring point of the monitoring station. Alloy rods are used to support each sensor, and the monitoring point still needs to be changed manually. The degree of intelligence is relatively high, and it is not convenient to change the monitoring point within a wide range. Therefore, we propose a smart city intelligent environmental monitoring device and method based on digital twins. Summary of the invention

[0005] The purpose of the present invention is to provide a smart city intelligent environment monitoring device and method based on digital twins, which can intelligently change the collection points of various data within a wide range, realize integrated data monitoring of land, water and air, and is of great help to the dynamic update of digital twin models.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A smart city intelligent environment monitoring device and method based on digital twins, including a server, and also including:

[0008] A slide rail, wherein the slide rail is horizontally fixed at the edge of a city river and is located above the water surface, the slide rail is a concave opening structure and a swing mechanism is provided at the opening, a control cabinet is fixed above the slide rail, a controller and a WIFI module connected to the controller signal are fixed inside the control cabinet, and the WIFI module is connected to the server through a signal base station;

[0009] A carrier plate, the carrier plate is arranged on the water surface of a city river, a driving mechanism is installed on the upper edge of the carrier plate, a turbine, a buoy and a water quality sensor are arranged in sequence along the axial direction on the lower surface of the carrier plate, the turbine is rotatably installed on the lower edge of the carrier plate away from the swing mechanism, and is rotated by the driving mechanism, the upper surface of the buoy is fixedly connected to the middle of the lower surface of the carrier plate, the detection end of the water quality sensor is downwardly probed into the water of the city river, and the end is upwardly penetrated through the carrier plate, and the water quality sensor and the driving mechanism are both connected to the controller by signal;

[0010] A column, wherein the column comprises a plurality of radially distributed oblique rods, and a noise sensor and an air quality sensor are fixed at intervals on the upper edge of the column, and the noise sensor and the air quality sensor are both connected to the controller by signal;

[0011] Soil quality sensor, the soil quality sensor signal is connected to the controller. When in use, the server is installed in the duty room with a specified configuration, the slide rail is installed at the edge of the urban river, and the buoy is filled with a sufficient amount of inert gas. Even if the water level changes, the buoy always drives the carrier to float on the water surface, so that the column is suspended high on the water surface. The water quality sensor monitors the water quality data in real time, the noise sensor monitors the noise data in real time, the air quality sensor monitors the air quality data in real time, and the soil quality sensor monitors the soil quality data in real time. The controller controls the WIFI module to upload these data to the server through the wireless network of the signal base station, and the server updates each data in real time on the digital twin model;

[0012] Then, the motion instructions are issued through the server in the duty room, and the controller starts the driving mechanism to rotate the turbine forward, pushing the carrier and the swing mechanism to move forward along the slide rail in the water, or reverses the turbine to pull the carrier and the swing mechanism to move in the opposite direction along the slide rail. The collection points of each data can be intelligently changed within a wide range. There is no need to manually move the environmental monitoring device, and it can also avoid residential activity areas to realize integrated data monitoring of land, water and air, which is of great help to the dynamic update of the digital twin model.

[0013] A wire storage box is fixed on the upper edge of the slide rail, and a wire threading block is slidably installed at the opening of the wire storage box. The wire storage box is used to accommodate the cables required by the control cabinet, and the wire threading block is fixed to the outside of the cables. The cables can be limited to prevent them from falling into the water. The cables can also slide with the swing mechanism to change the position of the cables in real time, and the outside of the cables are waterproofed with silicone.

[0014] The swing mechanism includes a slider slidably mounted at the opening of the slide rail, the upper surface of the slider is fixedly connected to the lower surface of the threading block, and also includes a swing arm in the shape of an arc rod, both ends of the swing arm are annular structures and the middle of the annular structure is rotatably mounted with a hinge shaft;

[0015] Among them, one of the hinged shafts is rotatably connected to one side of the slider, and the other hinged shaft is rotatably connected to the side of the carrier plate away from the turbine. When the water level rises or falls, the carrier plate can rotate relative to the other hinged shaft, and the swing arm can rotate relative to one hinged shaft, so that the swing arm can always tighten the carrier plate and the slider, making it convenient for the carrier plate to move forward or backward along the slide rail under the push of the turbine.

[0016] An infrared carbon dioxide sensor is also fixed on the upper edge of the column. The infrared carbon dioxide sensor signal is connected to the controller. The infrared carbon dioxide sensor monitors the carbon dioxide concentration data at the point in real time. The data is uploaded to the server through the wireless network of the signal base station through the WIFI module. The server updates the data in real time on the digital twin model.

[0017] A Beidou positioning module is fixed on the inner side of the column, and the signal of the Beidou positioning module is connected to the controller. At the same time, the location information of the point is monitored in real time through the Beidou positioning module, and the location information is uploaded to the server through the wireless network of the signal base station through the WIFI module. It is updated in real time on the digital twin model, and the accurate location of each data can be displayed in real time.

[0018] The width of the buoy is greater than that of the carrier plate. A counterweight is fixed to one side of the buoy away from the swing mechanism. The counterweight can be made of stone and is resistant to water immersion. In this way, the counterweight and the swing mechanism are balanced on both sides of the buoy, making it convenient for the carrier plate to remain horizontal.

[0019] The driving mechanism comprises a belt in an annular structure, and two transmission wheels are inserted inside the belt;

[0020] The middle of one of the transmission wheels is axially fixedly connected to the middle of the turbine, a motor is fixed on the upper edge of the carrier, and the output end of the motor is fixedly connected to the middle of another transmission wheel. The motor drive belt and the two transmission wheels are started, and the forward-rotating turbine can push the carrier to move forward, and the reverse-rotating turbine can push the carrier to move reversely. There is no need to move the carrier manually, and the carrier can be intelligently moved under program control to change each detection point.

[0021] A smart city intelligent environment monitoring method based on digital twins includes the following steps:

[0022] S1. Site selection: Based on the city planning map, select several monitoring sites at specified intervals in the city sightseeing river, and install smart city intelligent environment monitoring devices at the edge of the river at each site;

[0023] S2. Model building: The server is installed in the duty room with a specified configuration and equipped with a control and analysis unit to build a digital twin model and analyze the ecological environment change rate in different areas of the urban area;

[0024] S3. Data collection: The sensors collect data on carbon dioxide concentration, water quality, noise, and air quality. These data are uploaded to the server along the wireless network of the signal base station. The server updates the data in real time on the digital twin model.

[0025] S4, Range movement: Starting the motor to rotate the turbine can push the carrier to move, changing the monitoring point of each sensor within the radiation range of the slide rail. At the same time, the Beidou positioning module monitors the location information of the point in real time, and updates it in real time on the digital twin model, which can display the accurate location of each data in real time;

[0026] S5. Data statistics: Intelligently change the data collection points within a wider range to realize integrated data monitoring of land, sea and air, and draw them on the same fold chart for comparison with historical data of the same period. Data comparison is easier to distinguish, which is of great help for the dynamic update of the digital twin model.

[0027] The technical effects achieved by the present invention are:

[0028] The present invention discloses a smart city intelligent environment monitoring device based on digital twin. When in use, it is installed on the edge of a city river channel. Even if the water level changes, the buoy always drives the carrier plate to float on the water surface, so that the column is suspended high on the water surface. The water quality sensor monitors the water quality data in real time, the noise sensor monitors the noise data in real time, the air quality sensor monitors the air quality data in real time, and the soil quality sensor monitors the soil quality data in real time. The controller controls the WIFI module to upload these data to the server through the wireless network of the signal base station, and the server updates each data in real time on the digital twin model; then, the controller starts the forward or reverse turbine of the driving mechanism, pulls the carrier plate and the swing mechanism to move along the slide rail, and intelligently changes the collection point of each data within a wider range. There is no need to manually move the environmental monitoring device, and it can also avoid the residential activity area, so as to realize the integrated data monitoring of land, water and air, which is of great help for the dynamic update of the digital twin model.

[0029] The present invention discloses a smart city intelligent environment monitoring device based on digital twin. The cable storage box is used to accommodate the cables required by the control cabinet, and the threading block is fixed to the outside of the cable. The cable can be limited to prevent the cable from falling into the water. The cable can also slide with the swing mechanism to change the position of the cable in real time. The outside of the cable is waterproofed with silicone.

[0030] The present invention provides a smart city intelligent environment monitoring device based on digital twin. When the water level rises or falls, the carrier plate can rotate independently relative to another hinge shaft, and the swing arm can rotate independently relative to one hinge shaft, so that the swing arm can always tighten the carrier plate and the slider, making it convenient for the carrier plate and the swing arm to move forward or backward along the slide rail under the push of the turbine. In this way, the carrier plate has freedom in two directions, and its forward and backward movement and up and down swinging do not interfere with each other.

[0031] The present invention provides a smart city intelligent environment monitoring method based on digital twins. Through the steps of selecting sites, building models, collecting data, range movement and data statistics, the collection points of various data can be intelligently changed within a wider range to realize integrated data monitoring of land, sea and air. The data can be plotted on the same folded chart for comparison with historical data of the same period. Data comparison is easier to distinguish, which is of great help to the dynamic update of the digital twin model. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a front view of a smart city intelligent environment monitoring device based on digital twins according to the first embodiment of the present invention;

[0033] Figure 2 is a front view of the slide rail of the first embodiment of the present invention;

[0034] Figure 3 This is a front view of the control cabinet of the first embodiment of the present invention;

[0035] Figure 4 is a front view of a carrier board according to a first embodiment of the present invention;

[0036] Figure 5 is a front view of the driving mechanism of the first embodiment of the present invention;

[0037] Figure 6 It is a front view of a column according to the first embodiment of the present invention;

[0038] Figure 7 is a side view of the swing arm of the first embodiment of the present invention;

[0039] Figure 8 is a system block diagram of a controller according to a first embodiment of the present invention;

[0040] Fig. 9 This is a flow chart of a smart city intelligent environment monitoring method based on digital twins according to the second embodiment of the present invention.

[0041] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0042] 1. Server; 2. Slide rail; 201. Control cabinet; 202. WIFI module; 3. Carrier board; 301. Turbine; 302. Float; 303. Water quality sensor; 4. Column; 5. Noise sensor; 6. Air quality sensor; 7. Soil quality sensor; 8. Wire storage box; 9. Threading block; 10. Slider; 11. Swing arm; 12. Articulated shaft; 13. Blade; 14. Infrared carbon dioxide sensor; 15. Beidou positioning module; 16. Counterweight; 17. Belt; 18. Drive wheel; 19. Motor; 20. Warning light. DETAILED DESCRIPTION

[0043] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0044] like Figure 1-8 As shown, a smart city intelligent environment monitoring device based on digital twins includes a server 1. The server 1 refers to the Chinese invention of a smart city ecological environment monitoring system based on digital twins with a publication number of CN117007112B. The server 1 can be equipped with a control and analysis unit for building a digital twin model, analyzing the ecological environment change rate of different areas in the urban area, adjusting the location of the monitoring point accordingly, realizing dynamic adjustment, and improving the accuracy and comprehensiveness of monitoring. It also includes:

[0045] The slide rail 2 is horizontally fixed at the edge of the urban river and is located above the water surface. The slide rail 2 is a concave opening structure and a swing mechanism is provided at the opening. A control cabinet 201 is fixed above the slide rail 2. A Mitsubishi series controller and a WIFI module 202 connected to the controller signal are fixed inside the control cabinet 201. The WIFI module 202 can select an IOTAP WIFI module of the SKW92B model. The WIFI module 202 is connected to the server 1 through a signal base station;

[0046] The carrier plate 3 is arranged on the water surface of the urban river channel, a driving mechanism is installed on the upper edge of the carrier plate 3, a turbine 301, a buoy 302 and a water quality sensor 303 are arranged in sequence on the lower surface of the carrier plate 3 along the axial direction, the water quality sensor 303 can use an NTU model sensor, and optical fiber is used to transmit signals, the turbine 301 is rotatably installed on the lower edge of the carrier plate 3 away from the swing mechanism, and the upper surface of the buoy 302 is fixedly connected to the middle of the lower surface of the carrier plate 3 through the rotation of the driving mechanism, the detection end of the water quality sensor 303 is downwardly probed into the water of the urban river channel, and the end is upwardly penetrated through the carrier plate 3, and the water quality sensor 303 and the driving mechanism are both connected to the controller by signal;

[0047] The column 4 includes a plurality of radially distributed oblique rods. A noise sensor 5 and an air quality sensor 6 are fixed at intervals on the upper edge of the column 4. The noise sensor 5 can use a CRY2120 noise sensor, which integrates a measurement microphone, a preamplifier, and a data acquisition card. The built-in DSP processor transmits signals through the S485 interface. The noise sensor 5 and the air quality sensor 6 are both connected to the controller by signal. The air quality sensor 6 can use a FT.WQX6B sensor with a voltage of DC12V, and also transmits signals through the S485 interface.

[0048] Soil quality sensor 7, several soil quality sensors 7 are buried in the soil near the control cabinet 201 at intervals. The soil quality sensor 7 can use the HU3-HydraProbe Lite model soil three-parameter sensor, which can detect the moisture, conductivity and temperature of the target soil. The soil quality sensor 7 signal is connected to the controller; when in use, the server 1 is installed in the duty room with a specified configuration, the slide rail 2 is installed at the edge of the urban river, and the buoy 302 is filled with a sufficient amount of inert gas. Even if the water level changes, the buoy 302 always drives the carrier plate 3 to float on the water surface, so that the column 4 is suspended high on the water surface. The water quality sensor 303 monitors the water quality data in real time, the noise sensor 5 monitors the noise data in real time, the air quality sensor 6 monitors the air quality data in real time, and the soil quality sensor 7 monitors the soil quality data in real time, and the controller controls the WIFI module 202 to upload these data to the server 1 through the wireless network of the signal base station, and the server 1 updates each data in real time on the digital twin model;

[0049] Then, in the duty room, a motion instruction is issued through the server 1, and the controller starts the driving mechanism to rotate the turbine 301 forward, pushing the carrier 3 and the swing mechanism to move forward along the slide rail 2 in the water, or reverses the turbine 301 to pull the carrier 3 and the swing mechanism to move reversely along the slide rail 2. The collection points of various data are intelligently changed within a wider range. There is no need to manually move the environmental monitoring device, and it can also avoid residential activity areas, realizing integrated data monitoring of land, water and air, which is of great help to the dynamic update of the digital twin model.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, a wire storage box 8 is fixed on the upper edge of the slide rail 2, the lower wall of the wire storage box 8 is recessed downward and the recess is lower than the upper surface of the slide rail 2, and a wire threading block 9 is slidably installed at the opening of the wire storage box 8. The wire storage box 8 is used to accommodate the cables required by the control cabinet 201, and the wire threading block 9 is fixed to the outside of the cables. It can limit the cables to prevent them from falling into the water, and can also slide with the swing mechanism to change the position of the cables in real time, and the outside of the cables are waterproofed with silicone.

[0051] like Figure 1, Figure 4 and Figure 7 As shown, the swing mechanism includes a slider 10 slidably mounted at the opening of the slide rail 2, the upper surface of the slider 10 is fixedly connected to the lower surface of the threading block 9, and also includes an arc-shaped swing arm 11, both ends of the swing arm 11 are annular structures and the middle of the annular structure is rotatably mounted with a hinge shaft 12;

[0052] Among them, one hinge shaft 12 is rotatably connected to one side of the slider 10, and the other hinge shaft 12 is rotatably connected to the side of the carrier plate 3 away from the turbine 301. When the water level rises or falls, the carrier plate 3 can rotate relative to the other hinge shaft 12, and the swing arm 11 can rotate relative to one hinge shaft 12, so that the swing arm 11 can always tighten the carrier plate 3 and the slider 10, making it convenient for the carrier plate 3 to move forward or backward along the slide rail 2 under the push of the turbine 301.

[0053] like Figure 1 , Figure 2 and Figure 7 As shown, scrapers 13 are fixed at both ends of the slider 10, and the blades of the two scrapers 13 are both inside the slide rail 2. Dust and other impurities may accumulate inside the slider 10 and the slide rail 2. The slider 10 is used to drive the two scrapers 13 forward or backward. One of the scrapers 13 can shovel off the dust, clean the slide rail 2, and reduce the blockage caused by dust.

[0054] like Figure 1 , Figure 6 and Figure 8 As shown, an infrared carbon dioxide sensor 14 is also fixed on the upper edge of the column 4. The infrared carbon dioxide sensor 14 can use a CQ2 / A-5000P sensor with a range of 0 to 5000ppm and a resolution of 1ppm. The signal of the infrared carbon dioxide sensor 14 is connected to the controller. At the same time, the infrared carbon dioxide sensor 14 monitors the carbon dioxide concentration data of the point in real time, and the WIFI module 202 uploads these data to the server 1 through the wireless network of the signal base station, and the server 1 updates each data in real time on the digital twin model.

[0055] like Figure 1 , Figure 6 and Figure 8 As shown, a Beidou positioning module 15 is fixed on the inner side of the column 4. The Beidou positioning module 15 can select the Beidou module of model BD-1612D. The signal of the Beidou positioning module 15 is connected to the controller. At the same time, the location information of the point is monitored in real time through the Beidou positioning module 15. The location information is uploaded to the server 1 through the wireless network of the signal base station through the WIFI module 202, and updated in real time on the digital twin model, which can display the accurate location of each data in real time.

[0056] like Figure 1 and Figure 4As shown, the width of the float 302 is greater than the width of the carrier plate 3. A counterweight 16 is fixed to the side of the float 302 away from the swing mechanism. The counterweight 16 can be made of stone and is resistant to water immersion. In this way, the counterweight 16 and the swing mechanism are balanced on both sides of the float 302, respectively, so that the carrier plate 3 can remain horizontal.

[0057] like Figure 3 , Figure 4 and Figure 5 As shown, the driving mechanism includes a belt 17 in an annular structure, and two transmission wheels 18 are inserted inside the belt 17;

[0058] Among them, the middle of a transmission wheel 18 is axially fixedly connected to the middle of the turbine 301, and a motor 19 is fixed on the upper edge of the carrier plate 3. The motor 19 can use a 48mm DC brushless waterproof motor of model MT-BL4848-FS, with a rated voltage of 24V and a protection level of IP68. The output end of the motor 19 is fixedly connected to the middle of another transmission wheel 18. The motor 19 is started to drive the belt 17 and the two transmission wheels 18. The forward-rotating turbine 301 can push the carrier plate 3 to move forward, and the reverse-rotating turbine 301 can push the carrier plate 3 to move reversely. There is no need to manually move the carrier plate 3, and the carrier plate 3 can be intelligently moved under program control to change each detection point.

[0059] like Figure 3 , Figure 6 and Figure 8 As shown, a warning light 20 is fixed on the upper end of the column 4, and the signal of the warning light 20 is connected to the controller. During the night period, the warning light 20 can be set to turn on and emit a red light of normal brightness to warn passers-by not to touch or damage the intelligent environment monitoring device. In addition, an air circuit breaker is also installed inside the control cabinet 201, which will trip in time when a short circuit occurs in the circuit to reduce the occurrence of electrical accidents.

[0060] Embodiment 2:

[0061] In order to make it more convenient for technicians in this field to adopt the smart city intelligent environment monitoring device based on digital twin in Example 1, we have made further improvements to the steps of smart city environment monitoring.

[0062] like Fig. 9 As shown, a smart city intelligent environment monitoring method based on digital twins includes the following steps:

[0063] S1. Site selection: Based on the city planning map, select several monitoring sites at specified intervals in the city sightseeing river, and install smart city intelligent environment monitoring devices at the edge of the river at each site;

[0064] S2. Model building: Server 1 is installed in the duty room with a specified configuration and equipped with a control and analysis unit to build a digital twin model and analyze the ecological environment change rate in different areas of the urban area;

[0065] S3, data collection: The carbon dioxide concentration data, water quality data, noise data, and air quality data are collected through various sensors. These data are uploaded to the server 1 along the wireless network of the signal base station. The server 1 updates the data in real time on the digital twin model.

[0066] S4, range movement: Starting the motor 19 to rotate the turbine 301 can drive the carrier 3 to move intelligently, so as to realize the intelligent change of the monitoring point of each sensor within the radiation range of the slide rail. At the same time, the position information of the point is monitored in real time through the Beidou positioning module 15, and updated in real time on the digital twin model, so as to display the accurate position of each data in real time;

[0067] S5. Data statistics: Intelligently change the data collection points within a wider range to realize integrated data monitoring of land, sea and air, and draw them on the same fold chart for comparison with historical data of the same period. Data comparison is easier to distinguish, which is of great help for the dynamic update of the digital twin model.

[0068] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A smart city intelligent environment monitoring device based on digital twin, comprising a server (1), characterized in that: Also includes: A slide rail (2), the slide rail (2) being fixed horizontally at the edge of a city river and being located above the water surface, the slide rail (2) being a concave opening structure and a swing mechanism being arranged at the opening, a control cabinet (201) being fixed above the slide rail (2), a controller and a WIFI module (202) connected to the controller signal being fixed inside the control cabinet (201), the WIFI module (202) being connected to the server (1) via a signal base station; A carrier plate (3), the carrier plate (3) being arranged on the water surface of a city river, a driving mechanism being installed on the upper edge of the carrier plate (3), a turbine (301), a buoy (302) and a water quality sensor (303) being arranged in sequence on the lower surface of the carrier plate (3) along the axial direction, the turbine (301) being rotatably installed on the lower edge of the carrier plate (3) away from the swing mechanism, and being rotated by the driving mechanism, the upper surface of the buoy (302) being fixedly connected to the middle of the lower surface of the carrier plate (3), the detection end of the water quality sensor (303) being downwardly protruded into the water of the city river, and the end being upwardly penetrating the carrier plate (3), and the water quality sensor (303) and the driving mechanism being both signal-connected to a controller; A column (4), the column (4) comprising a plurality of radially distributed inclined rods, a noise sensor (5) and an air quality sensor (6) being fixed at intervals on the upper edge of the column (4), and the noise sensor (5) and the air quality sensor (6) are both connected to the controller via signals; A soil quality sensor (7), the soil quality sensor (7) signal is connected to the controller.

2. According to claim 1, a smart city intelligent environment monitoring device based on digital twins is characterized in that: A wire storage box (8) is fixed to the upper edge of the slide rail (2), and a wire threading block (9) is slidably mounted at the opening of the wire storage box (8).

3. According to claim 2, a smart city intelligent environment monitoring device based on digital twins is characterized in that: The swing mechanism comprises a slider (10) slidably mounted at the opening of the slide rail (2), the upper surface of the slider (10) being fixedly connected to the lower surface of the threading block (9), and also comprises a swing arm (11) in the shape of an arc rod, both ends of the swing arm (11) being annular structures and a hinge shaft (12) being rotatably mounted in the middle of the annular structure; One of the hinge shafts (12) is rotatably connected to one side of the slider (10), and the other hinge shaft (12) is rotatably connected to a side of the carrier plate (3) away from the turbine (301).

4. According to claim 3, a smart city intelligent environment monitoring device based on digital twins is characterized in that: Shovel blades (13) are fixed at both ends of the sliding block (10), and the blades of the two scrapers (13) are both located inside the sliding rail (2).

5. The smart city intelligent environment monitoring device based on digital twin according to claim 1 is characterized in that: An infrared carbon dioxide sensor (14) is also fixed to the upper edge of the column (4), and the signal of the infrared carbon dioxide sensor (14) is connected to the controller.

6. The smart city intelligent environment monitoring device based on digital twin according to claim 1 is characterized in that: A Beidou positioning module (15) is fixed on the inner side of the column (4), and the Beidou positioning module (15) is connected to the controller by signal.

7. The smart city intelligent environment monitoring device based on digital twin according to claim 1 is characterized in that: The width of the buoy (302) is greater than the width of the carrier plate (3), and a counterweight (16) is fixed to a side of the buoy (302) away from the swing mechanism.

8. The smart city intelligent environment monitoring device based on digital twin according to claim 1, characterized in that: The driving mechanism comprises a belt (17) in an annular structure, and two transmission wheels (18) are inserted inside the belt (17); The middle of one of the transmission wheels (18) is axially fixedly connected to the middle of the turbine (301), a motor (19) is fixed to the upper edge of the carrier plate (3), and the output end of the motor (19) is fixedly connected to the middle of the other transmission wheel (18).

9. The smart city intelligent environment monitoring device based on digital twin according to claim 1, characterized in that: A warning light (20) is fixed to the upper end of the column (4), and a signal of the warning light (20) is connected to a controller.

10. A smart city intelligent environment monitoring method based on digital twin, applied to a smart city intelligent environment monitoring device based on digital twin according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Site selection: Based on the city planning map, select several monitoring sites at specified intervals in the city sightseeing river, and install smart city intelligent environment monitoring devices at the edge of the river at each site; S2. Model building: the server (1) is installed in the duty room using a specified configuration and equipped with a control and analysis unit for building a digital twin model to analyze the ecological environment change rate in different areas of the urban area; S3, data collection: carbon dioxide concentration data, water quality data, noise data, and air quality data are collected through various sensors respectively, and these data are uploaded to the server (1) along the wireless network of the signal base station. The server (1) updates each data in real time on the digital twin model; S4, range movement: starting the motor (19) to rotate the turbine (301) can push the carrier (3) to move, changing the monitoring point of each sensor within the radiation range of the slide rail, and at the same time monitoring the position information of the point in real time through the Beidou positioning module (15), and updating it in real time on the digital twin model, so as to display the accurate position of each data in real time; S5. Data statistics: Intelligently change the collection points of each data within a range to realize integrated data monitoring of land, sea and air, and draw them on the same fold chart for comparison with historical data of the same period. Data comparison is easier to distinguish, which is of great help for the dynamic update of the digital twin model.

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