CN110058547A - Garden sponge Internet of Things network control system and its construction method - Google Patents

Abstract

The invention discloses a garden sponge Internet of Things control system, which comprises a sponge garden rainwater collection building module, a sponge garden collection rainwater purification and utilization module, a residual rainwater staggered peak drainage module and an Internet of Things intelligent perception layer, an operation layer and a decision layer module; The invention also discloses its construction method. Aiming at the technical requirements of rainwater storage and utilization in the existing sponge garden mode, the invention couples the Internet of Things and the soil moisture digital signal transmission system, and through intelligent judgment of the system, achieves accurate rainwater collection, rapid water quality purification and utilization of the irrigation mode. And realize the peak shift/peak cut drainage mode of the rainwater pipe network system in the community. The invention comprehensively integrates a grass planting ditch, a porous water collecting and draining pipe, a rainwater storage tank, a rapid purification process of rainwater sand filtration, precise utilization of moisture signal control, and an emptying and replenishing water system controlled by Internet of Things weather information.

Description

Garden sponge Internet of Things control system and its construction method

technical field

The invention belongs to the technical field of water supply and drainage, and in particular relates to a garden sponge Internet of Things control system and a construction method thereof.

Background technique

Sponge city construction is an important part of lucid waters and lush mountains, and it is an inevitable requirement to promote the construction of ecological civilization. When upgrading the urban drainage system, priority should be given to retaining limited rainwater, making more use of natural forces for drainage, and building natural accumulation, natural infiltration, and The sponge city, which is naturally purified and effectively utilized, strengthens the ability to adapt to environmental changes and respond to natural disasters. However, at the same time of rapid urbanization, urban development is also facing huge environmental and resource pressures, and the extensional growth model of urban development is unsustainable.

Resident courtyards and urban communities form a modern urban construction organically from point to face. Starting from residential courtyards and urban communities to build a sponge city, the scientific layout and construction of a rainwater storage and utilization system to absorb its own rainwater is in line with the construction concept of "slow discharge and slow release" and "source control" of the sponge city, which can not only avoid floods It can also collect and utilize rainwater to play the role of sponge, thereby improving the ecological environment of the city and improving the quality of life of the people.

SUMMARY OF THE INVENTION

Purpose of the invention: In order to solve the problems existing in the prior art, the present invention provides a courtyard sponge Internet of Things control system, which applies Internet of Things information and digital control technology to the sponge courtyard construction system; the present invention also provides its construction method, which not only has low construction cost , The courtyard rainwater utilization model with high effect and strong applicability realizes the public participation in rainwater engineering and the construction system of sponge city.

Technical scheme: In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical scheme:

The invention discloses a garden sponge Internet of Things control system, which comprises a sponge garden rainwater collection building module, a sponge garden collection rainwater purification and utilization module, a residual rainwater staggered peak drainage module and an Internet of Things intelligent perception layer, an operation layer and a decision layer module; The sponge garden rainwater collection building module realizes the source of clean rainwater utilization and the sponge function. The rainwater processed by the sponge garden rainwater collection building module enters the purification and utilization module of accumulated rainwater. The purification and utilization module of accumulated rainwater is controlled by the green space moisture signal, according to the courtyard. The drought level of the green space enables or disables rainwater irrigation; the staggered peak discharge module of the remaining rainwater receives the IoT information of the IoT intelligent sensing layer, operation layer and decision layer module, and implements the emptying of the pool before the rain, accumulating the next rainfall, and reducing the rainwater pipe network. Drainage peak flow; IoT intelligent perception layer, operation layer and decision-making layer modules are the control platform for receiving and sending commands for soil moisture, weather forecast and other signals, ensuring the system operation logic and the realization of sponge city functions.

Further, the rainwater collection building module of the sponge courtyard is constructed by the specific measures of the courtyard, based on the function and structural design of the residential courtyard, including the courtyard green infiltration, the concave green space, the grass ditch, the rainwater storage pond, and the rainwater runoff. The total control rate is the target, and the rainwater falls on the roof and courtyard. After infiltration, interception and retention by sponge measures, the clean rainwater is guided to the rainwater storage tank; when the rainwater storage tank is full, the subsequent rainwater is discharged to the The municipal rainwater pipe network realizes the functions of rainwater runoff, rainwater discharge and rainwater storage in the sponge courtyard.

Further, the described sponge garden collects rainwater purification and utilization module, including rainwater rapid purification, green space irrigation system, soil moisture meter and multi-point control unit (MCU main control board). The board connects, distributes and transforms the digital signal of the soil moisture meter, and transmits it to the intelligent perception layer, operation layer and decision-making layer of the Internet of Things module, accepts its decision-making instructions, and completes the rapid purification of rainwater and garden green space irrigation in turn, and the soil moisture meter When it senses that the moisture content is suitable, it transmits information to the IoT module and accepts the instruction to stop the watering of the green space.

Further, the residual rainwater peak-staggered drainage module includes storage rainwater drainage facilities. When the IoT intelligent perception layer, operation layer and decision-making layer module obtain the IoT information, the upcoming rainfall and rainfall time, make decisions and send the information to the system. The residual rainwater staggered drainage module sends an instruction, and the storage tank discharges an appropriate amount of water before the rain.

Further, the IoT intelligent perception layer, operation layer and decision-making layer modules include signal transmission equipment, weather forecast IoT information, and intelligent mobile receiving terminals. The perception layer is located at the bottom layer of IoT control, and the acquired perception information comes from Garden green space moisture and network weather forecast information; the operation layer is the command sending process, that is, sending command signals to the rainwater purification and utilization module and the remaining rainwater discharge module; the decision-making layer accepts soil moisture meter, weather forecast and other information, and the opening and closing status of the decision-making system is related to working plan.

The construction method of the described garden sponge Internet of Things control system includes the following methods:

1) The described sponge garden rainwater collection building module: the total rainwater runoff control rate of the sponge garden structure is applicable to the total rainwater runoff control rate specified by the national standard or the local competent authority;

2) The purification and utilization module of the garden collected rainwater: the purification and utilization of the accumulated rainwater is controlled by the MCU main control board, which is connected to the soil moisture meter and the controller of the purification and utilization facility of the accumulated rainwater. The soil moisture detected by the soil moisture meter is transmitted to the Internet of Things terminal (mobile smartphone, etc.) as a digital signal by writing a program, and the feedback signal of the soil moisture meter is tandem, filtered and distributed, and then the command signal is sent to the accumulated rainwater. Decontamination and Management Use the facility's control panel to activate or deactivate the facility. The steps of purifying and utilizing accumulated rainwater are as follows: the garden green space moisture signal sets the humidity conditions required for the growth of garden green space plants. It is 7, which indicates the degree of soil drought, corresponding to 20% of soil wetland), trigger the control machine to start water purification and green space irrigation facilities, and implement garden green sprinkler irrigation. 70%), the water purification and green space irrigation facilities are automatically closed, and irrigation is stopped. During two more rains, the cycle opens and closes.

3) The remaining rainwater staggered peak drainage module: the smart phone receiving terminal system of the IoT intelligent perception, decision-making and operation module analyzes the IoT weather forecast information, and according to the forecasted precipitation size and precipitation time (the system default time is the IoT Rainfall time provided by the weather forecast), automatically (or reserve a manual controller) to turn on the drainage pump of the rainwater storage tank, that is, within 24 hours before the next rainfall, empty the unused rainwater in the storage tank and empty the storage tank volume, In order to accumulate the next precipitation, and realize the peak shift/peak shaving drainage mode of the rainwater pipe network system in the community.

4) The functional realization mode of the intelligent sensing, decision-making and operation module of the Internet of Things is: realized by an intelligent mobile receiving terminal (such as a smart phone terminal) with a network transceiver function. The functions of intelligent perception, decision-making and operation mode are realized through the calculation program, and the terminal interface of the smart phone displays and sends instructions. The soil moisture meter and the MCU control board transmit the soil moisture to the module, and after signal tandem, distribution and conversion, send commands to start the rapid purification of accumulated rainwater and green space irrigation facilities; when the soil moisture meter transmits a moisture signal with a certain moisture content, The module sends commands to shut down the irrigation facility on its own. When the smart phone terminal senses the weather forecast information of the Internet of Things, it sets the digital signal for forecasting rainfall amount and rainfall time, and controls the drainage pump that stores rainwater to be turned on within 24 hours before the next rainfall, and the drainage is staggered in advance.

Principle of invention: The design of sponge courtyard is an important part of urban source emission reduction and sponge city construction projects, and it is the source of urban rainwater production and confluence. The rainwater collection and treatment intelligent utilization system of the sponge garden based on the Internet of Things realizes the public participation in the construction process of the sponge city. The system starts the sponge construction at the source of the city. It has the characteristics of low cost, high efficiency and strong practicability. Sponge city construction requirements. The Internet of Things is an important part of the new generation of information technology, and it is also an important development stage in the "informationization" era. The Internet of Things information is extended and expanded on the basis of the Internet to realize intelligent remote control, providing an operation and control platform for the user terminal; the mobile user terminal can exchange information and remote control through smart phones.

Beneficial effect: Compared with the prior art, the present invention aims at the technical requirements of rainwater storage and utilization in the existing sponge garden mode, couples the Internet of Things and the soil moisture digital signal transmission system, and makes accurate rainwater through intelligent judgment of the system. Collection, rapid water quality purification and utilization of irrigation mode, and realize peak shift/peak cut drainage mode of rainwater pipe network system in the community. The invention comprehensively integrates a grass planting ditch, a porous water collecting and draining pipe, a rainwater storage tank, a rapid purification process of rainwater sand filtration, precise utilization of moisture signal control, and an emptying and replenishing water system controlled by Internet of Things weather information.

Description of drawings

Figure 1 is the construction process diagram of the sponge garden based on the Internet of Things to control the collection and utilization of rainwater

Figure 2 is a plan view of a residential courtyard sponge construction system;

Figure 3 is the technical roadmap of the rainwater system for residential courtyards;

Figure 4 is a process diagram of rainwater collection and water purification in residential courtyards;

Figure 5 shows the smart phone terminal interface in the courtyard of the residential sponge system.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific implementation examples.

The invention discloses a residential courtyard sponge system based on intelligent control, which integrates weather forecast, Internet of Things, and soil moisture digital signal identification and control. The purpose is to propose the rainwater for courtyard residential buildings on the basis of sponge measures for building courtyard residential (villa) systems. The intelligent control system design and construction mode of infiltration, storage, purification, utilization and discharge. Based on the design goal of the total runoff control rate in residential courtyards, we design a sponge courtyard structure model for grass-planting ditch, seepage storage pipe canal, rainwater collection and purification, and rainwater staggered discharge in the courtyard. The soil moisture meter of the green space in the courtyard detects the moisture content and controls the watering and utilization of the accumulated rainwater, so as to realize the precise utilization of the collected and purified rainwater. Receive and transmit weather forecast IoT signals through smart phones to control the discharge of accumulated rainwater in real time, realize the drainage of the previous accumulated rainwater within 24 hours before the rain, realize the peak-staggered/peak-shaving drainage mode of the rainwater pipe network system of buildings and communities, and fully realize the sponge city function.

The courtyard sponge IoT control system includes the sponge courtyard rainwater collection building module, the sponge courtyard collection rainwater purification and utilization module, the residual rainwater staggered drainage module and the IoT intelligent perception layer, operation layer and decision-making layer module; the sponge courtyard rainwater collection building module is Relying on, carrying the function of cleaning the source of rainwater utilization and sponge; the purification and utilization module of accumulated rainwater is controlled by the green space moisture signal, and the rainwater irrigation is activated or closed according to the dryness of the courtyard green space; the staggered discharge module of the remaining rainwater receives the information from the Internet of Things and receives it. Control, empty the pool before rain, accumulate the next rainfall, and reduce the peak drainage flow of the rainwater pipe network; the IoT intelligent perception layer, operation layer and decision-making layer modules are the control platform for soil moisture, weather forecast and other signal reception and command sending. Guarantee system operation logic and sponge city function realization.

The structure and function of each module in the courtyard sponge IoT control system are designed as follows:

1) Building module for rainwater collection in sponge courtyard: It is constructed from specific sponge measures in the courtyard, including courtyard green infiltration, concave green space, grass ditch, rainwater storage pond, etc. Based on the functional and structural design of residential courtyards, the total amount of rainwater runoff is The volume control rate is targeted, and the rainwater falls on the roof and courtyard. After infiltration, interception, filtration, and retention by sponge measures, the clean rainwater is guided to the rainwater storage tank. When the rainfall lasts for a long time and the rainwater storage tank is full, the subsequent rainwater will be discharged to the municipal rainwater pipe network.

2) The sponge garden collects rainwater purification and utilization module: including rapid rainwater purification, green space irrigation system, soil moisture meter and multi-point control unit (MCU main control board), etc. The soil moisture meter detects the moisture condition, and the MCU main control board will The digital signals of the soil moisture meter are connected, distributed and converted, and transmitted to the intelligent sensing layer, operation layer and decision-making layer of the Internet of Things, accepting their decision-making instructions, and completing the rapid purification of rainwater and garden green space irrigation in turn, and the soil moisture meter senses water content. When the rate is suitable, the information is transmitted to the IoT module, and the instruction to stop the watering of the green space is accepted.

3) Remaining rainwater staggered peak drainage module; composed of accumulated rainwater drainage facilities (water pump and liquid level gauge, etc.). When the IoT intelligent perception layer, operation layer and decision-making layer module obtain the IoT information (weather forecast), the upcoming rainfall and rainfall time, make decisions and send instructions to the remaining rainwater off-peak drainage module, the storage tank will be drained before the rain. Empty or drain the appropriate amount of water.

4) IoT intelligent perception layer, operation layer and decision-making layer modules. The module is the intelligent control center of the present invention, which is composed of signal transmission equipment, weather forecast Internet of Things information, intelligent mobile receiving terminals (such as intelligent collection mobile phones) and the like. The perception layer is located at the bottom layer of the Internet of Things control, and the acquired perception information comes from the courtyard green space moisture (soil moisture meter and MCU main control board) and the network weather forecast information. The operation layer is the command sending process, that is, sending command signals to the rainwater purification and utilization module and the remaining rainwater discharge module. The decision-making layer accepts data information such as soil moisture meter and weather forecast, and decides the opening and closing status and work plan of the system.

The construction method of residential courtyard sponge controlled by the Internet of Things for weather forecast and soil moisture, and the implementation plans and standards of each module are as follows:

1) Building module of rainwater collection in sponge courtyard: The total control rate of rainwater runoff constructed by sponge courtyard is applicable to the national standard "Sponge City Construction Evaluation Standard" (GB/T51345-2018) or the total control rate of rainwater runoff stipulated by the local competent authority. For the implementation of the garden sponge, see the design and functional realization of green underground infiltration, rainwater stagnation, and rainwater accumulation in the "Example", but it is not limited to the process data regulations in the example.

2) The purification and utilization module of rainwater collected in the courtyard: The purification and utilization of accumulated rainwater is controlled by the MCU main control board, which is connected to the soil moisture meter and the controller of the purification and utilization facilities of accumulated rainwater. The soil moisture detected by the soil moisture meter is transmitted to the Internet of Things terminal (mobile smartphone, etc.) as a digital signal by writing a program, and the feedback signal of the soil moisture meter is tandem, filtered and distributed, and then the command signal is sent to the accumulated rainwater. Decontamination and Management Use the facility's control panel to activate or deactivate the facility. The steps of purifying and utilizing accumulated rainwater are as follows: the garden green space moisture signal sets the humidity conditions required for the growth of garden green space plants. It is 7, which indicates the degree of soil drought, corresponding to 20% of soil wetland), trigger the control machine to start water purification and green space irrigation facilities, and implement garden green sprinkler irrigation. 70%), the water purification and green space irrigation facilities are automatically closed, and irrigation is stopped. During two more rains, the cycle opens and closes. In the present invention, after being intercepted and filtered by the garden sponge facility, the quality of the rainwater is relatively good, and it is appropriate to use the quick sand filter purification facility for simple treatment, which can be used for garden green space irrigation. The quick sand filter is made of plexiglass round tube with a diameter of about 250mm and a total height of about 1.5m. The filter material is graded quartz sand and low-density concrete filler, and the filter speed is 8-10m/h. Rainwater rapid sand filter purification equipment is not limited to the above process parameters.

3) Remaining rainwater staggered peak drainage module: The smart phone receiving terminal system of the IoT intelligent perception, decision-making and operation module analyzes the IoT weather forecast information, according to the predicted precipitation amount and precipitation time (the default time of the system is provided by the IoT weather forecast). Rainfall time), automatically (or reserve a manual controller) to turn on the drainage pump of the rainwater storage tank, that is, within 24 hours before the next rainfall, empty the unused rainwater in the storage tank, and vacate the storage tank volume to accumulate water. secondary precipitation, and realize the peak-staggered/peak-shaving drainage mode of the community rainwater pipe network system.

4) The intelligent perception, decision-making and operation module of the Internet of Things is the intelligent control center for information reception, filtering and instruction sending, which is realized by an intelligent mobile receiving terminal (such as a smartphone terminal) with network transceiver function. The functions of intelligent perception, decision-making and operation mode are realized through the calculation program, and the terminal interface of the smart phone displays and sends instructions. The soil moisture meter and the MCU control board transmit the soil moisture to the module, and after signal tandem, distribution and conversion, send commands to start the rapid purification of accumulated rainwater and green space irrigation facilities; when the soil moisture meter transmits a moisture signal with a certain moisture content, The module sends commands to shut down the irrigation facility on its own. When the smart phone terminal senses the weather forecast information of the Internet of Things, it sets the digital signal for forecasting rainfall amount and rainfall time, and controls the drainage pump that stores rainwater to be turned on within 24 hours before the next rainfall, and the drainage is staggered in advance.

Adopt the construction method of the residential garden sponge controlled by the weather forecast and soil moisture Internet of Things according to the present invention, and its advantages are:

(1) To realize the energy-saving and emission-reduction system mode of courtyard residential rainwater system and green space irrigation, and design a sponge courtyard integrating grass planting ditch, porous seepage drainage pipe, rainwater storage tank, purification facilities, and greening irrigation with the goal of controlling the total amount of runoff The construction model proposes a source-controlled sponge garden construction method for rainwater runoff, collection and utilization. The goal is to realize unconventional water resources utilization for green space irrigation and sprinkling, so as to save the water consumption of urban tap water and achieve the precision of rainwater in sponge gardens. Utilize and control patterns.

(2) The green space moisture digitally controls the precise reuse of garden green space watering, sets the humidity conditions required for plant growth (soil moisture content ≥ 20%), and monitors the soil moisture (soil moisture) by a soil moisture meter. Below a certain threshold (20%), the digital signal is transmitted, and the green space irrigation is based on the premise of supplementing the most suitable amount of water, which realizes the precise utilization of water resources for garden green space irrigation.

(3) The weather forecast IoT signal is connected to the storage and seepage rainwater drainage control to realize the peak shift/peak-shaving rainwater drainage of the sponge garden. The smart phone weather IoT signal reception and pre-rain drainage command control system are designed, and automatic control is set at the same time. With two modes of manual control, the discharge and purification of rainwater can be controlled through the smartphone interface.

Example

(1) Design of courtyard sponge system

As shown in Figure 2, the volume of the reservoir is calculated according to the control rate of the total amount of courtyard and local runoff. Taking the courtyard of a residential area in Jiangning District, Nanjing as an example, the specific parameters are: the total area of the courtyard is 960m ² , of which the garage area is 50m ^{2 ;} ; The projected area of the house plane is 308m ² ; the area of the courtyard green space (lawn) is 538m ² .

According to the relevant regulations of "Technical Guidelines for Miancheng City Construction - Construction of Rainwater System for Low Impact Development (Trial)", the design basis of this courtyard sponge facility is the rainfall thickness corresponding to 33.6mm when the total runoff control rate in Nanjing is 85%.

Yard runoff coefficient: The runoff coefficient of green roof is 0.3; the runoff coefficient of courtyard gravel pavement is 0.4; the runoff coefficient of courtyard lawn (green space) is 0.15; the runoff coefficient of concrete pavement is 0.8. The comprehensive runoff coefficient of the courtyard is 0.4×32+538×0.15+(50+308)×0.3=0.214.

The amount of seepage water in the courtyard green space: fine sand is used as the seepage medium, and the seepage system K=1.2×10-5m/s. The amount of permeated water is: W _P =1.2×10-5×570×2×3600=49.25m ³ .

Water storage capacity of the concave green space: two concave green spaces are designed in the courtyard, distributed around the green space, and the roads are naturally separated. The concave water storage depth is designed to be 100mm, the width is 500mm, and the length is 80m, then the water demand of the concave green space is: V _{sinking green space} =80×0.5×0.1=4m ³ ; the rainwater storage capacity of residential courtyards under the total runoff control rate (85%): when the design total runoff control rate is 85%, the total rainwater is: V _total =10×0.0366×0.214×960=75.19m ³ ; the design water demand volume of the rainwater reservoir is: V _{water storage} =75.19-4-49.25=21.94m ³ .

In this scheme, the rainwater storage tank is designed to be located in the basement, and its effective water storage volume is 22m ³ . The storage tank has the functions of sedimentation, sludge discharge and drainage. Design a cistern.

(2) Rainwater purification (see Figure 4):

The rainwater sand filter quick filter is the external equipment of the reservoir, and the number is 1. The water from the reservoir enters the sand filter by gravity. The sand filter is designed with a filtration rate of 8-10m/h, and the filter material is a double-layer filter material of 5-8mm graded gravel and 2mm graded quartz sand, and the thickness of the filter material is 1.0m. The filter system is equipped with a set of backwashing facilities.

Process description: 60% of the SS in the rainwater collected by the garden green grass-planting ditch is intercepted in the grass-planting ditch, and the corresponding COD removal rate is about 20%. The rainwater collection tank is equipped with a sedimentation bucket, and the sedimentable particles entering the tank are lowered to the sludge bucket, and the SS remaining in the water is removed by a sand filter column. After the sedimentation tank and sand filter column treatment, the effluent COD and SS can meet the water quality requirements for greening.

During a rainfall, runoff began to appear in the drainage outlet 15 minutes after the rainfall began, and within 1 hour of the rainfall, the pollutant concentration was high, and the water quality status of COD and ammonia nitrogen was inferior to Class V water quality. "Technical Specifications for Rainwater Utilization Engineering for Buildings and Community" (GB50400-2006) stipulates that the concentration limits of COD and SS for greening and ornamental water quality are 30mg/L and 10mg/L respectively, and nitrogen and phosphorus in rainwater are used as plant nutrients. elements, and put forward specific indicators. According to the monitored rainwater quality and the water quality requirements for garden greening, the main objects of rainwater collected in the garden are COD and SS. Among them, the removal rate of COD is about 50%, and the maximum removal rate of SS is about 85%.

The water from the filter tank enters the clear water storage tank, and two sets are set up to water the nearby green space and supply the miscellaneous water for the garden at the same time.

Balance calculation of garden miscellaneous water consumption: Generally, the water used for greening in courtyard community is 1.0L/(m ² .d)～3.0L/(m ² .d), and the water consumption of green space in one day is V _watering =2×570×10- 3=1.14m ³ . Then, under the condition of no need to replenish water in this scheme, the time that one water storage can be used for garden green space watering is: V _{water storage} /V _watering =19.2d.

As shown in Figure 1, the courtyard green space in this scheme is watered by sprinkling, and water reservoirs with a volume of 11m ³ are set under the green space on the east and west sides of the courtyard respectively. Fill the water pipes in the green space so that the sprinkler irrigation area can cover all the vegetation.

(3) Residential courtyard rainwater purification and utilization control (see Figure 3):

The water storage tank is equipped with a water pump: as the drainage and water purification device of the rainwater storage tank. By accepting the network weather forecast (Internet of Things) to control the water quality and start, the reservoir will be emptied within 1 day before the rainy weather forecast is received to make room for the next rainwater, and play the role of a sponge facility for rainwater regulation.

Clean water storage pump after purification: pressurized water pump for garden greening water, its opening and closing device is controlled by the threshold value of soil moisture (water content or degree of drought). For example, the optimum soil moisture content for garden plant growth is 22% to 30%. When the moisture content meter measures the moisture content below 22%, the water pump will be started for irrigation. When the moisture content reaches 30%, the water pump will be automatically turned off.

In addition, in order to reflect the energy-saving characteristics of the courtyard dwelling sponge system, the solar energy can be used as the power system in the design of this system. The main reason is that drought generally occurs when the weather is fine, when the sun is full, and the power system is more secure. Before rainy days, use solar energy to drain the stored unused rainwater.

(4) Digital conversion and transmission of IoT signals and soil moisture for storage and utilization of rainwater:

Use a MCU as the main control to connect the soil moisture detector to detect the soil moisture. In the program, filter the value returned by the soil moisture detector once, and set 10 humidity level ranges. When the soil humidity is greater than a certain When the value is set (for example, this threshold is temporarily set to 7), the control machine is triggered to turn on the water pump and sprinkle the garden. When the humidity is lower than this value, the irrigation will be stopped. At the same time, we will obtain the weather forecast information one day in advance from the Internet, and through this information, we will carry out the water storage treatment of the water reservoir.

As shown in Figure 5, the Internet of Things information access interface controlled by a smartphone. The interface will display the soil moisture and weather forecast in real time. The system is divided into two modes: automatic control and manual control: in the automatic mode, the system will automatically judge whether to empty the water in the water accumulator and soil moisture according to the weather forecast information to judge whether it should be pumped and sprinkled; in the manual mode, the user can Control the operation of pumps and valves.

Claims (6)

1. The courtyard sponge Internet of Things control system is characterized in that: the system includes a sponge courtyard rainwater collection building module, a sponge courtyard collection rainwater purification and utilization module, a residual rainwater peak-staggered drainage module and an Internet of Things intelligent perception layer, an operation layer and a decision-making layer. Module; The sponge garden rainwater collection building module realizes the clean rainwater utilization source and sponge function. The rainwater processed by the sponge garden rainwater collection building module enters the purification and utilization module of the accumulated rainwater, and the purification and utilization module of the accumulated rainwater is controlled by the green space moisture signal. Start or stop rainwater irrigation according to the degree of drought in the green space of the courtyard; the staggered peak discharge module for the remaining rainwater receives the IoT information from the IoT intelligent perception layer, operation layer and decision layer module, and implements emptying the pool before rain, accumulating the amount of water for the next rainfall, reducing the Rainwater pipe network drainage peak flow; IoT intelligent perception layer, operation layer and decision-making layer modules are the control platform for soil moisture, weather forecast signal reception and command sending, ensuring the system operation logic and the realization of sponge city functions. 2. The courtyard sponge Internet of Things control system according to claim 1, characterized in that: the sponge courtyard rainwater collection building module is constructed by the specific measures of the courtyard, based on the function and structural design of the residential courtyard, including the courtyard green space Infiltration, sunken green space, grass ditch, rainwater storage pond, with the goal of controlling the total amount of rainwater runoff, the rainwater falls on the roof and courtyard, and after infiltration, interception and retention by sponge measures, the clean rainwater is guided to Rainwater storage tank; when the rainwater storage tank is full, the subsequent rainwater will be discharged to the municipal rainwater pipe network to realize the functions of rainwater runoff, rainwater external discharge and rainwater accumulation in the sponge garden. 3. The garden sponge Internet of Things control system according to claim 1, characterized in that: the described sponge garden collects rainwater purification and utilization module, including rainwater rapid purification, green space irrigation system, soil moisture meter and multi-point control unit, When the soil moisture meter detects the moisture condition, the MCU main control board connects, distributes and transforms the digital signal of the soil moisture meter, and transmits it to the intelligent perception layer, operation layer and decision layer module of the Internet of Things, accepts its decision-making instructions, and completes it in turn. Rapid purification of rainwater and garden green space irrigation, when the soil moisture meter senses that the moisture content is suitable, it transmits information to the IoT module and accepts the instruction to stop the green space watering. 4. The garden sponge Internet of Things control system according to claim 1, characterized in that: the residual rainwater staggered peak drainage module includes accumulated rainwater drainage facilities, and when the Internet of Things intelligent perception layer, operation layer and decision layer module pass through Obtain the Internet of Things information, the upcoming rainfall and rainfall time, make decisions and send instructions to the remaining rainwater staggered drainage module, and the storage tank will discharge an appropriate amount of water before the rain. 5. The garden sponge Internet of Things control system according to claim 1, characterized in that: said Internet of Things intelligent perception layer, operation layer and decision-making layer modules include signal transmission equipment, weather forecast Internet of Things information, intelligent mobile reception The terminal, the perception layer is located at the bottom layer of the Internet of Things control, and the perception information is obtained from the courtyard green space moisture and network weather forecast information; the operation layer is the command sending process, that is, to the rainwater purification and utilization module and the remaining rainwater discharge module. Send command signals; the decision-making layer Accept soil moisture meter, weather forecast and other information, and decide the opening and closing status and work plan of the system. 6. the construction method of the garden sponge Internet of Things control system described in any one in claim 1-5, is characterized in that: 1) The described sponge garden rainwater collection building module: the total rainwater runoff control rate of the sponge garden structure is applicable to the total rainwater runoff control rate specified by the national standard or the local competent authority; 2) The described garden collecting rainwater purification and utilization module: the purification and utilization of accumulated rainwater is controlled by the MCU main control board, which is connected to the controller of the soil moisture meter and the purification and utilization facility of accumulated rainwater; soil moisture detected by the soil moisture meter , by writing a program to transmit digital signals to the Internet of Things terminal, and tandem, filter and distribute the feedback signal of the soil moisture meter, and then send the command signal to the control board of the accumulated rainwater purification and management and utilization facilities to start or close the facility. The steps of purifying and utilizing the accumulated rainwater are: the courtyard green space moisture signal sets the humidity conditions required for the growth of the garden green space plants, such as setting the level of soil aridity in the garden green space, and when the soil humidity is greater than the set value, the control machine is triggered to start Water purification and green space irrigation facilities implement green sprinkler irrigation in the courtyard. When the humidity decreases to the set value, the water purification and green space irrigation facilities will be automatically closed and irrigation will be stopped; during the second rainfall period, the cycle will be opened and closed; 3) The remaining rainwater staggered peak drainage module: the smart phone receiving terminal system of the IoT intelligent perception, decision-making and operation module analyzes the IoT weather forecast information, and automatically or reserves manual control according to the forecasted precipitation amount and precipitation time The device turns on the drainage pump of the rainwater storage tank, that is, within 24 hours before the next rainfall, the unused rainwater in the storage tank is emptied, and the volume of the storage tank is emptied to store the next rainfall and realize the peak/staggered rainwater pipe network system in the community. Peak clipping drainage mode; 4) The functions of the intelligent perception, decision-making and operation modules of the Internet of Things are realized in the following ways: realized by an intelligent mobile receiving terminal with network transceiver function; intelligent perception, decision-making and operation modes are realized by calculation programs, and the interface of the intelligent mobile phone terminal is realized. Display and send instructions; the soil moisture meter and the MCU main control board transmit the soil moisture to the module, and after signal tandem, distribution and conversion, send instructions to start the rapid purification of accumulated rainwater and green space irrigation facilities; when the soil moisture meter transmits a certain moisture content When the moisture signal is received, the module sends an instruction to close the irrigation facilities by itself; when the smart phone terminal senses the weather forecast information of the Internet of Things, it sets the digital signal of the forecast rainfall and rainfall time, and controls the opening of the rainwater accumulation within 24 hours before the next rainfall. Drainage pump, staggered drainage in advance.