CN111528050A - Irrigation system is collected to municipal administration rainwater - Google Patents

Abstract

The invention discloses a municipal rainwater collecting and irrigating system, which comprises an infrared sensor, a soil temperature sensor, a soil humidity sensor, an electromagnetic valve, a variable frequency driver and a water level sensor which are all connected with a central controller, wherein the electromagnetic valve is connected with a rainwater collecting port, the variable frequency driver is connected with an irrigation water pump, and the rainwater collecting port, a water storage tank and an irrigation spray head are connected through pipelines; compared with the prior art, the intelligent irrigation system improves the traditional artificial irrigation into an intelligent irrigation system, saves water resources, saves a large amount of manpower and material resources, improves the working efficiency and reduces various operation costs. Meanwhile, under the condition of saving water resources to the maximum extent, the optimal water source condition is provided for the plants, and the healthy growth of the plants is ensured.

Description

Irrigation system is collected to municipal administration rainwater

Technical Field

The invention belongs to the technical field of water resource saving and recycling, and particularly relates to a municipal rainwater collecting and irrigating system.

Background

The water resource of China is relatively small in the whole world, and the quantity of all water resource people is only 1/5 which is the average level in the world, so that the water resource is very precious in China, and the consumption of irrigation water is very large, so that the water resource is saved from the irrigation water. Along with the acceleration of the urbanization process, the urban greening area of China is further increased, the irrigation water consumption of the green belt is continuously increased, and the problem of saving and reusing the irrigation water is urgent. And the road green belt is irrigated through regularly arranging the watering lorry to current technique, neither can the water economy resource, still consuming time is hard, also can not irrigate according to the accurate control water consumption of actual conditions. In fact, the difficulty of realizing intelligent irrigation in the prior art is that whether the irrigation conditions suitable for plants, such as temperature and humidity, can be judged, irrigation is regulated in a type-mode manner according to the irrigation conditions suitable for plants and according to different conditions, and the work of the whole irrigation system is accurately controlled in a plant coverage range, such as various indexes and parameters needing coordinated and coordinated control, such as irrigation opportunity, duration, interval time, coverage range, segmented irrigation and the like.

Therefore, how to better save and recycle the water resource on the basis of ensuring the water consumption for normal irrigation, and the problem that the water consumption is required to be solved urgently at present can be irrigated by accurately controlling the water consumption according to actual conditions in a type and mode division manner.

Disclosure of Invention

In order to solve the problems, the invention adopts the following technical scheme:

in order to better save and recycle water resources, on one hand, the water resources can be saved from the water taking source, and on the other hand, the utilization rate of water needs to be improved, according to the principle, the invention provides a system for collecting and recycling water resources, which is characterized in that: the system comprises a water resource collecting device, a water storage device water quantity sensor, a water using device and a water using state acquisition sensor which are all connected with a controller, wherein the water resource collecting device, the water storage device and the water using device are connected by pipelines;

the controller is used for receiving the acquisition information of the water quantity sensor and the water using state acquisition sensor of the water storage device and respectively controlling the water resource collection device and the water using device to be opened and closed;

the water resource collecting device is used for collecting water resources, such as rainwater;

the water storage device is used for storing water resources;

the water storage device water quantity sensor is used for detecting the residual water storage space of the water storage device;

the water using device is used for using water resources;

the water use state acquisition sensor is used for detecting whether a water resource using object needs to use water or not;

the connecting pipeline is used for transporting water resources.

The working principle of the system for collecting and reusing water resources is as follows: if water storage device still has the space can the water storage, open water resource collection device and collect, then, when judging according to the information acquisition of water state acquisition sensor and need the water, open water using device to put through water storage device and water using device's connecting tube, for water using device supplies water, when need not the water, close water using device and connecting tube.

Description of the drawings: each part in the water resource collection and reuse system can be transformed or structurally replaced to different degrees according to specific use scenes, but the use function and the solved technical problem are not changed.

The beneficial technical effects are as follows: compared with the regular arrangement of water supply operation for water supply units, the system for collecting and recycling water resources has two advantages, one is saving of various costs of various resources, including water resources, labor cost, purchase and lease costs of operating vehicles and equipment, operation cost of the water supply units and the like, the other is supplying water accurately for the water supply units, supplying water according to needs, supplying water by the system when the water supply units need water, and supplying water in fixed water quantity mode without time for water supply operation, so that the water demand time and the water demand quantity of water supply objects can not be matched, and the system for collecting and recycling water resources is another form of artificial water resource waste, and the defects are overcome, and the greatest advantage is achieved.

As shown in figure 1, a municipal rainwater collection and irrigation system is characterized in that: the rainwater irrigation system comprises an infrared sensor, a soil temperature sensor, a soil humidity sensor, a solenoid valve, a variable frequency driver and a water level sensor which are all connected with a central controller, wherein the solenoid valve is connected with a rainwater collecting opening, the variable frequency driver is connected with an irrigation water pump, and the rainwater collecting opening, a water storage tank and an irrigation spray head are connected through pipelines;

the central controller is used for receiving real-time monitoring data of the infrared sensor, the soil temperature sensor, the soil humidity sensor and the water level sensor, performing calculation and analysis through a specific internal algorithm, sending an instruction to the electromagnetic valve and the variable frequency driver according to a preset control strategy, and respectively controlling the opening and closing of the rainwater collecting port and the switching and power of the irrigation water pump;

the infrared sensor is arranged right above the horizontal section of the municipal road drainage pipe in front of the rainwater collecting port and is used for detecting the rainwater level of the municipal road drainage pipe;

the soil temperature sensor and the soil humidity sensor are buried under the soil surface layer at proper depths and are respectively used for detecting the current temperature and humidity of the soil;

the water level sensor is used for detecting the water level of the current water storage tank;

the electromagnetic valve is used for receiving an instruction of the central controller to control the opening and closing of the rainwater collecting port;

the variable frequency driver is used for receiving an instruction of the central controller to control the on-off and the power of the irrigation water pump;

the rainwater collecting port is used for collecting rainwater in the municipal road drainage pipeline and is arranged at the bottom of the horizontal section of the municipal road drainage pipeline;

the irrigation water pump is used for pumping out water in the water storage tank, and conveying the water to an irrigation spray head through a pipeline for irrigation;

the irrigation spray heads are arranged at a certain height right above the half width of the municipal road green belt, and are arranged in a plurality according to the length of the green belt, and are used for spraying and irrigating the green belt.

The theory of operation of irrigation system is collected to aforementioned municipal rainwater: infrared sensor, soil temperature sensor, soil moisture sensor and level sensor with its data transmission to central controller of real-time monitoring, central controller calculates through specific internal algorithm and analyzes whether there is rainwater and rainfall, the greenbelt is whether need to irrigate, irrigate water pressure, irrigate time, irrigate frequency and irrigate behind the interval isoparametric, send instruction to solenoid valve and frequency conversion driver according to predetermined control strategy, the opening and closing of mouth is collected to the rainwater of controlling respectively, and irrigate the switch of water pump, power and operating frequency's change.

The water flow path from collection to irrigation of rainwater in the municipal rainwater collection and irrigation system is shown in fig. 2, and the working process is as follows: when rainwater exists, the water storage tank is not full, water enters the space, the rainwater collection port is opened, the rainwater enters the water storage tank through the collection port and the pipeline, when the temperature and the humidity of the soil exceed a set value, the water pump is started to pump water, and green belt irrigation is carried out through the spray head.

The specific internal algorithm and the control strategy applied to the municipal rainwater collection and irrigation system are combined to obtain a control mode according to the rainwater amount in the municipal road drainage pipeline, the soil state of the green belt, the total capacity of the water storage tank and the residual capacity, wherein the control mode comprises the following steps:

(1) rainwater collection mode

The formula of the current cross-sectional area of rainwater passing through the municipal road drainage pipeline is as follows:

① when H>When the compound is in the R state,

② when H < R,

③ when H is R, A is 0.5 pi R²

Wherein A-rainwater passes through the current cross-sectional area of the municipal road drainage pipeline;

r-radius of municipal road drainage pipe;

the distance between the right upper part of the drainage pipeline and the water surface is detected by an H-infrared sensor;

the opening and closing conditions of the rainwater collecting port are as follows:

① when A is more than or equal to A₀And t is greater than or equal to t₀When the rainwater collecting port is opened;

② when A < A₀Or t < t₀When the rainwater collecting port is closed, the rainwater collecting port is closed;

wherein A is₀-opening the cross-sectional area of the water flow corresponding to the lowest level of the rainwater collection port;

t-the current duration of the rainwater passing through the municipal road drainage pipeline;

t₀-minimum rainwater elapsed duration of opening of the rainwater collection opening;

description of the drawings: here, a is an approximate estimation, since the current rainwater flow does not need to be detected very accurately, as long as the condition for opening the rainwater collection port can be detected; a. the₀And T₀The system is preset and adjustable, and the matching adjustment can be carried out according to the road sections laid by the system, the greening area and the water storage tank capacity;

(2) intelligent irrigation mode

Intelligent irrigation starting conditions are as follows:

when R is less than or equal to R₀₁When the intelligent irrigation mode 1 is started, the intelligent irrigation mode is started;

when R is not less than R₀₁And T is not less than T₀₁When the intelligent irrigation mode 2 is started, the intelligent irrigation mode is started;

the intelligent irrigation closing condition is as follows:

when R is not less than R₀₂When the intelligent irrigation mode 1 is closed, the intelligent irrigation mode is switched off;

when R is not less than R₀₁And T is less than or equal to T₀₁When the intelligent irrigation mode 2 is closed;

wherein R-the current measured relative humidity of the soil;

R₀₁-a minimum value for soil relative humidity suitable for the green belt;

R₀₂-maximum soil relative humidity suitable for green belts;

t-the currently measured soil temperature;

T₀-maximum suitable soil temperature for green belts;

description of the drawings: the intelligent irrigation operation is judged to be started or not, the two parameters are soil temperature and soil humidity respectively, the soil humidity is used as a main judgment index and represents the physical quantity of the soil dryness and humidity degree of a soil layer with a certain depth, and the physical quantity is also called as soil moisture content. The relative humidity of soil is expressed by relative water content such as percentage of water content of soil to field capacity or percentage of water content relative to saturated water, and is mainly influenced by factors such as precipitation, air temperature, vegetation type and terrain conditions. The soil relative humidity is an important index for representing agricultural drought, and can comprehensively reflect most information of soil moisture conditions and surface hydrology processes. According to the relative humidity of the soil, the water content of the soil can be known, and the water content can be maintained, so that the method has a reference value in irrigation. The soil humidity influences the field climate, the soil air permeability and the nutrient decomposition, and is one of the important conditions for the soil microbial activity and the crop growth and development. The drought level index according to the soil relative humidity (R) can be 60 percent<R is 50 percent of no drought<The R is less than or equal to 60 percent and is mild drought, 40 percent<R is less than or equal to 50 percent, is moderate drought, and is 30 percent<The severe drought is defined as R less than or equal to 40%, and the particularly severe drought is defined as R less than or equal to 30%. Because different plant growth conditions have different temperature and humidity adaptation ranges, R in the intelligent irrigation starting condition is adopted₀₁、R₀₂And T₀₁The determination of (2) is determined according to the appropriate soil relative humidity and soil temperature range of plants or vegetation in a green belt laid by the system, and the system can preset R of a plurality of groups of plants with different types₀₁、R₀₂And T₀₁However, the user can adjust the position according to the specific situation, and special attention is needed during the adjustment, R₀₁、R₀₂And T₀₁The value of (A) is within the range of the standard value, and a certain margin is left, namely R₀₁Greater than the actual soilMinimum value of relative humidity standard, R₀₂Less than the maximum value of the actual soil relative humidity standard, T₀₁Is less than the highest value of the actual suitable soil temperature, so that most control errors can be offset. The intelligent irrigation mode 1 is a conventional mode, namely the water in the soil really reaches a lower value of a plant growth condition and needs to be irrigated in time; the intelligent irrigation mode 2 is a special mode, namely, although the moisture in the soil does not reach the lower value of the plant growth condition, the normal growth of the plant can be influenced because the temperature of the soil reaches the higher value of the plant growth, and the effect of reducing the temperature is achieved by a small amount of irrigation;

③ Intelligent irrigation mode 1

As shown in fig. 3, irrigation is performed in a manner that irrigation is performed alternately at equal time intervals of a whole area and a half area, and specific control parameters and output values are as follows:

a. the water pressure standard values required by the global irrigation form are as follows:

b. the standard water pressure value required by the semi-regional irrigation form is as follows:

wherein, P₁-a global irrigation form required water pressure normalized value;

P₂-water pressure standard value required for a semi-field irrigation form;

ρ -density of water;

b-width of green belt;

g-acceleration of gravity;

h-the height value of the spray head higher than the surface layer of the soil;

the output value of the corresponding variable frequency driver for controlling the irrigation pump is as follows:

a. the output value of the frequency conversion driver control irrigation water pump corresponding to the global irrigation form is as follows:

b. the output value of the frequency conversion driver control irrigation water pump corresponding to the global irrigation form is as follows:

wherein, f 1-the frequency conversion driver corresponding to the global irrigation controls and outputs the theoretical value;

f₂-controlling output theoretical values of variable frequency drives corresponding to half-field irrigation;

-variable frequency drive static error compensation coefficients;

k-conversion coefficient between control frequency of the variable frequency driver and output pressure of the irrigation water pump;

the duration rules for global and semi-local irrigation are: the global and the half-domain alternate circulation irrigation and satisfy the following relation.

Therefore, the output sequence of the final control of the variable frequency drive is in the form of a group of waveforms, as shown in FIG. 4, according to the first output frequency f₁Duration t of signal₁Time, re-output frequency f₂Duration t of signal₂Time, the two are alternately output until a stop signal is input;

intelligent irrigation mode 2

Because intelligent mode 2 only goes to reach the effect of cooling through a small amount of irrigation, so the irrigation water yield a little can, adopt and divide the cubic, 5% of the standard irrigation water yield of irrigation at every turn, the cubic is totally carried out the mode of 15% standard irrigation water yield, still takes the form that global and half-field equal time interval go on in turn to irrigate, and satisfies following relation:

Q₀green belt one timeStandard irrigation water amount for irrigation;

n-the number of nozzles of the irrigation spray head;

a-the cross section area of a nozzle of the irrigation nozzle;

t₁-duration of each time of global irrigation;

t₂-duration of each half-field irrigation;

m₁ smart irrigation mode 1 Global irrigation Total duration m₁T is₁Time;

m₂ intelligent irrigation mode 1 semi-field irrigation co-duration m₂T is₂Time;

m₁₀smart irrigation mode 2 global irrigation total duration m₁₀T is₁Time;

m₂₀intelligent irrigation mode 2 semi-field irrigation co-duration m₂₀T is₂Time;

description of the drawings: the intelligent irrigation mode mainly controls the irrigation water quantity of a green belt, namely the water spraying quantity of an irrigation nozzle, and aims to accurately control the water spraying quantity under the conditions of covering the area of the whole green belt and saving water, because the lower the frequency of a water pump is, the lower the rotating speed of the irrigation water pump is, and the corresponding pressure and flow are naturally reduced, the working power of the irrigation water pump is controlled by adopting a variable-frequency driver, namely the water pressure of the irrigation nozzle can be controlled, so that the spraying distance and flow of the irrigation nozzle can be controlled, and the system can adjust the output value of the variable-frequency driver according to the actual condition to finally control the spraying state of the irrigation nozzle, namely the spraying distance and the spraying flow; the conversion coefficient K between the control frequency of the variable frequency drive and the output pressure of the irrigation pump is obtained from a performance curve provided by a manufacturer, the relation is a natural law of the water pump in physics and is a relatively stable relation value, the flow is approximately in direct proportion to the frequency, and the pressure is approximately in direct proportion to the square of the frequency. The static error compensation coefficient of the variable frequency driver is adjusted within a given value range when a variable frequency driver manufacturer delivers from a factory for debugging so as to adapt to different irrigation pumps; in order to uniformly irrigate the water to the whole green belt, a global and half-domain alternative irrigation mode is adopted, so that the condition that water is unevenly distributed due to the fact that only the outer ring of the green belt is irrigated is avoided, and the global and half-domain irrigation nozzles are specifically sprayed to the areas with the distance between the outermost boundary and the half distance between the outermost boundary of the green belt; the standard irrigation water quantity of the primary irrigation of the green belt is the minimum irrigation water quantity calculated according to the area of the green belt and the density of the plants, after the primary irrigation is finished, waiting for a period of time, and if the relative humidity of soil still does not reach the minimum standard, performing secondary irrigation until the relative humidity of the soil reaches the minimum standard; because the duration of the whole domain and the half domain is a fixed value each time no matter preset or adjusted, the standard irrigation water quantity of the green belt for one-time irrigation is not necessarily completely equal to that of the green belt each time, so that the standard irrigation water quantity is expressed as approximately equal to that of the green belt, but the error of the whole domain and the half domain is +/-5%.

The beneficial technical effects are as follows: this system improves traditional artifical irrigation into intelligent irrigation system, and the water economy resource saves a large amount of manpowers, material resources, improves work efficiency, reduces various operation costs. Meanwhile, under the condition of saving water resources to the maximum extent, the optimal water source condition is provided for the plants, and the healthy growth of the plants is ensured.

A computer-readable storage medium having stored thereon a computer program, characterized in that: the steps of implementing the function of the municipal rainwater collection and irrigation system when the program is executed by the processor are as follows:

(1) detecting whether rainwater flows into municipal drainage pipelines or not;

(2) if rainwater flows into a municipal drainage pipeline, whether the water storage tank has residual space is checked, if so, an opening command is sent to an electromagnetic valve, and a rainwater collection port is opened;

(3) when the water storage pool has no residual space, sending a closing command to the electromagnetic valve, and closing the rainwater collection port;

(4) detecting whether the soil temperature and humidity data exceed a set value or not, if so, sending an opening instruction and a corresponding control instruction to an irrigation water pump, controlling the irrigation water pressure, the irrigation time, the irrigation frequency and the irrigation interval time of the irrigation water pump, and carrying out irrigation operation;

(5) and after the irrigation is finished, sending a closing instruction to the irrigation water pump to finish the irrigation.

Compared with the prior art, the intelligent irrigation system improves the traditional artificial irrigation into an intelligent irrigation system, saves water resources, saves a large amount of manpower and material resources, improves the working efficiency and reduces various operation costs. For example, the irrigation of the expressway green isolation belt is generally carried out in the peak period of the road in the daytime, the water truck irrigation seriously influences the road traffic capacity, the road occupation time per kilometer year is 240h according to the calculation of irrigating 15 times per year and 2 shifts per time for the expressway green isolation belt at present, the road occupation time per kilometer year is equivalent to 1/36 per year, and thus the method brings great economic loss, which is only a simple conservative estimation of time cost, and various operation costs of other manpower and material resources are not calculated.

Meanwhile, the invention provides the best water source condition for the plants under the condition of saving water resources to the maximum extent, thereby ensuring the healthy growth of the plants.

The following table is a statistical table of the optimal irrigation water volume (cubic meters per mu) of a certain plant under different temperature (DEG C) and humidity (RH) conditions.

The above table also fully shows that the plants do not need to be irrigated at any time or need a fixed water amount forever, but the water requirements are different under different temperature and humidity conditions and are related to seasons and illumination, but the most direct influence condition is the temperature and humidity of soil, the system intelligently adjusts irrigation in different types and modes according to different conditions according to plant growth conditions, and accurately controls the work of the whole irrigation system in a plant coverage range, such as irrigation time, duration, interval time, coverage range, sectional irrigation and other various indexes and parameters needing coordinated and cooperative control, so that the optimal water source condition is provided for the plants under the condition of saving water resources to the maximum extent, and the purpose and good effect of ensuring the healthy growth of the plants are achieved.

Drawings

For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the water flow path from collection to irrigation of rainwater according to the present invention;

FIG. 3 is a schematic view of the present invention for both global and semi-global irrigation;

FIG. 4 is a schematic diagram of the output form of the variable frequency drive controlled by the central controller according to the present invention.

In the figure: 1-irrigation spray head, 2-connecting pipe with irrigation water pump, 3-green belt soil, 4-global irrigation water flow and 5-half-area irrigation water flow.

Detailed Description

In order to better save and reuse water resources, on the one hand, the water can be saved from the water taking source, and on the other hand, the utilization rate of water needs to be improved.

Example 1

A system for collecting and recycling water resources comprises a water resource collecting device, a water storage device water quantity sensor, a water using device and a water using state acquisition sensor which are all connected with a controller, wherein the water resource collecting device, the water storage device and the water using device are connected by pipelines;

the controller is used for receiving the acquisition information of the water quantity sensor and the water using state acquisition sensor of the water storage device and respectively controlling the water resource collection device and the water using device to be opened and closed;

the water resource collecting device is used for collecting water resources, such as rainwater;

the water storage device is used for storing water resources;

the water storage device water quantity sensor is used for detecting the residual water storage space of the water storage device;

the water using device is used for using water resources;

the water use state acquisition sensor is used for detecting whether a water resource using object needs to use water or not;

the connecting pipeline is used for transporting water resources.

The working principle of the system for collecting and reusing water resources is as follows: if water storage device still has the space can the water storage, open water resource collection device and collect, then, when judging according to the information acquisition of water state acquisition sensor and need the water, open water using device to put through water storage device and water using device's connecting tube, for water using device supplies water, when need not the water, close water using device and connecting tube.

Description of the drawings: each part in the water resource collection and reuse system can be transformed or structurally replaced to different degrees according to specific use scenes, but the use function and the solved technical problem are not changed.

The beneficial technical effects are as follows: compared with the regular arrangement of water supply operation for water supply units, the system for collecting and recycling water resources has two advantages, one is saving of various costs of various resources, including water resources, labor cost, purchase and lease costs of operating vehicles and equipment, operation cost of the water supply units and the like, the other is supplying water accurately for the water supply units, supplying water according to needs, supplying water by the system when the water supply units need water, and supplying water in fixed water quantity mode without time for water supply operation, so that the water demand time and the water demand quantity of water supply objects can not be matched, and the system for collecting and recycling water resources is another form of artificial water resource waste, and the defects are overcome, and the greatest advantage is achieved.

Example 2

As shown in figure 1, a municipal rainwater collection and irrigation system is characterized in that: the rainwater irrigation system comprises an infrared sensor, a soil temperature sensor, a soil humidity sensor, a solenoid valve, a variable frequency driver and a water level sensor which are all connected with a central controller, wherein the solenoid valve is connected with a rainwater collecting opening, the variable frequency driver is connected with an irrigation water pump, and the rainwater collecting opening, a water storage tank and an irrigation spray head are connected through pipelines;

the central controller is used for receiving real-time monitoring data of the infrared sensor, the soil temperature sensor, the soil humidity sensor and the water level sensor, performing calculation and analysis through a specific internal algorithm, sending an instruction to the electromagnetic valve and the variable frequency driver according to a preset control strategy, and respectively controlling the opening and closing of the rainwater collecting port and the switching and power of the irrigation water pump;

the infrared sensor is arranged right above the horizontal section of the municipal road drainage pipe in front of the rainwater collecting port and is used for detecting the rainwater level of the municipal road drainage pipe;

the soil temperature sensor and the soil humidity sensor are buried under the soil surface layer at proper depths and are respectively used for detecting the current temperature and humidity of the soil;

the water level sensor is used for detecting the water level of the current water storage tank;

the electromagnetic valve is used for receiving an instruction of the central controller to control the opening and closing of the rainwater collecting port;

the variable frequency driver is used for receiving an instruction of the central controller to control the on-off and the power of the irrigation water pump;

the rainwater collecting port is used for collecting rainwater in the municipal road drainage pipeline and is arranged at the bottom of the horizontal section of the municipal road drainage pipeline;

the irrigation water pump is used for pumping out water in the water storage tank, and conveying the water to an irrigation spray head through a pipeline for irrigation;

the irrigation spray heads are arranged at a certain height right above the half width of the municipal road green belt, and are arranged in a plurality according to the length of the green belt, and are used for spraying and irrigating the green belt.

The theory of operation of irrigation system is collected to aforementioned municipal rainwater: infrared sensor, soil temperature sensor, soil moisture sensor and level sensor with its data transmission to central controller of real-time monitoring, central controller calculates through specific internal algorithm and analyzes whether there is rainwater and rainfall, the greenbelt is whether need to irrigate, irrigate water pressure, irrigate time, irrigate frequency and irrigate behind the interval isoparametric, send instruction to solenoid valve and frequency conversion driver according to predetermined control strategy, the opening and closing of mouth is collected to the rainwater of controlling respectively, and irrigate the switch of water pump, power and operating frequency's change.

The water flow path from collection to irrigation of rainwater in the municipal rainwater collection and irrigation system is shown in fig. 2, and the working process is as follows: when rainwater exists, the water storage tank is not full, water enters the space, the rainwater collection port is opened, the rainwater enters the water storage tank through the collection port and the pipeline, when the temperature and the humidity of the soil exceed a set value, the water pump is started to pump water, and green belt irrigation is carried out through the spray head.

The specific internal algorithm and the control strategy applied to the municipal rainwater collection and irrigation system are combined to obtain a control mode according to the rainwater amount in the municipal road drainage pipeline, the soil state of the green belt, the total capacity of the water storage tank and the residual capacity, wherein the control mode comprises the following steps:

(1) rainwater collection mode

The formula of the current cross-sectional area of rainwater passing through the municipal road drainage pipeline is as follows:

① when H>When the compound is in the R state,

② when H < R,

③ when H is R, A is 0.5 pi R²

Wherein A-rainwater passes through the current cross-sectional area of the municipal road drainage pipeline;

r-radius of municipal road drainage pipe;

the distance between the H-infrared sensor and the water surface and the distance between the H-infrared sensor and the water surface above the drainage pipeline are detected;

the opening and closing conditions of the rainwater collecting port are as follows:

① when A is more than or equal to A₀And t is greater than or equal to t₀At first, openOpening a rainwater collecting port;

② when A < A₀Or t < t₀When the rainwater collecting port is closed, the rainwater collecting port is closed;

wherein A is₀-opening the cross-sectional area of the water flow corresponding to the lowest level of the rainwater collection port;

t-the current duration of the rainwater passing through the municipal road drainage pipeline;

t₀-minimum rainwater elapsed duration of opening of the rainwater collection opening;

description of the drawings: here, a is an approximate estimation, since the current rainwater flow does not need to be detected very accurately, as long as the condition for opening the rainwater collection port can be detected; a. the₀And T₀The system is preset and adjustable, and the matching adjustment can be carried out according to the road sections laid by the system, the greening area and the water storage tank capacity;

(2) intelligent irrigation mode

Intelligent irrigation starting conditions are as follows:

when R is less than or equal to R₀₁When the intelligent irrigation mode 1 is started, the intelligent irrigation mode is started;

when R is not less than R₀₁And T is not less than T₀₁When the intelligent irrigation mode 2 is started, the intelligent irrigation mode is started;

the intelligent irrigation closing condition is as follows:

when R is not less than R₀₂When the intelligent irrigation mode 1 is closed, the intelligent irrigation mode is switched off;

when R is not less than R₀₁And T is less than or equal to T₀₁When the intelligent irrigation mode 2 is closed;

wherein R-the current measured relative humidity of the soil;

R₀₁-a minimum value for soil relative humidity suitable for the green belt;

R₀₂-maximum soil relative humidity suitable for green belts;

t-the currently measured soil temperature;

T₀-maximum suitable soil temperature for green belts;

description of the drawings: the intelligent irrigation operation is judged to be started or not, the two parameters are soil temperature and soil humidity respectively, and the soil humidity is used as a main judgment index and represents soil of a soil layer with a certain depthThe physical quantity of the degree of dryness and wetness of the soil is also called the soil moisture content. The relative humidity of soil is expressed by relative water content such as percentage of water content of soil to field capacity or percentage of water content relative to saturated water, and is mainly influenced by factors such as precipitation, air temperature, vegetation type and terrain conditions. The soil relative humidity is an important index for representing agricultural drought, and can comprehensively reflect most information of soil moisture conditions and surface hydrology processes. According to the relative humidity of the soil, the water content of the soil can be known, and the water content can be maintained, so that the method has a reference value in irrigation. The soil humidity influences the field climate, the soil air permeability and the nutrient decomposition, and is one of the important conditions for the soil microbial activity and the crop growth and development. The drought level index according to the soil relative humidity (R) can be 60 percent<R is 50 percent of no drought<The R is less than or equal to 60 percent and is mild drought, 40 percent<R is less than or equal to 50 percent, is moderate drought, and is 30 percent<The severe drought is defined as R less than or equal to 40%, and the particularly severe drought is defined as R less than or equal to 30%. Because different plant growth conditions have different temperature and humidity adaptation ranges, R in the intelligent irrigation starting condition is adopted₀₁、R₀₂And T₀₁The determination of (2) is determined according to the appropriate soil relative humidity and soil temperature range of plants or vegetation in a green belt laid by the system, and the system can preset R of a plurality of groups of plants with different types₀₁、R₀₂And T₀₁However, the user can adjust the position according to the specific situation, and special attention is needed during the adjustment, R₀₁、R₀₂And T₀₁The value of (A) is within the range of the standard value, and a certain margin is left, namely R₀₁Greater than the lowest value of the actual soil relative humidity standard, R₀₂Less than the maximum value of the actual soil relative humidity standard, T₀₁Is less than the highest value of the actual suitable soil temperature, so that most control errors can be offset. The intelligent irrigation mode 1 is a conventional mode, namely the water in the soil really reaches a lower value of a plant growth condition and needs to be irrigated in time; the intelligent irrigation mode 2 is a special mode, namely, the water in the soil does not reach the lower value of the plant growth condition, but the normal growth of the plant can be influenced because the soil temperature reaches the higher value of the plant growth, and the water needs to pass throughA small amount of irrigation is carried out to achieve the effect of cooling;

③ Intelligent irrigation mode 1

As shown in fig. 3, irrigation is performed in a manner that irrigation is performed alternately at equal time intervals of a whole area and a half area, and specific control parameters and output values are as follows:

a. the water pressure standard values required by the global irrigation form are as follows:

b. the standard water pressure value required by the semi-regional irrigation form is as follows:

wherein, P₁-a global irrigation form required water pressure normalized value;

P₂-water pressure standard value required for a semi-field irrigation form;

ρ -density of water;

b-width of green belt;

g-acceleration of gravity;

h-the height value of the spray head higher than the surface layer of the soil;

the output value of the corresponding variable frequency driver for controlling the irrigation pump is as follows:

a. the output value of the frequency conversion driver control irrigation water pump corresponding to the global irrigation form is as follows:

b. the output value of the frequency conversion driver control irrigation water pump corresponding to the global irrigation form is as follows:

wherein f is₁-controlling output theoretical values of a variable frequency drive corresponding to global irrigation;

f₂-half domainControlling and outputting a theoretical value by a variable-frequency driver corresponding to irrigation;

-variable frequency drive static error compensation coefficients;

k-conversion coefficient between control frequency of the variable frequency driver and output pressure of the irrigation water pump;

the duration rules for global and semi-local irrigation are: the global and the half-field alternate circulation irrigation satisfies the following relations:

therefore, the output sequence of the final control of the variable frequency drive is in the form of a group of waveforms, as shown in FIG. 4, according to the first output frequency f₁Duration t of signal₁Time, re-output frequency f₂Duration t of signal₂Time, the two are alternately output until a stop signal is input;

intelligent irrigation mode 2

Because intelligent mode 2 only goes to reach the effect of cooling through a small amount of irrigation, so the irrigation water yield a little can, adopt and divide the cubic, 5% of the standard irrigation water yield of irrigation at every turn, the cubic is totally carried out the mode of 15% standard irrigation water yield, still takes the form that global and half-field equal time interval go on in turn to irrigate, and satisfies following relation:

Q₀-standard irrigation water amount for one irrigation of green belt;

n-the number of nozzles of the irrigation spray head;

a-the cross section area of a nozzle of the irrigation nozzle;

t₁-duration of each time of global irrigation;

t₂-duration of each half-field irrigation;

m₁ smart irrigation mode 1 Global irrigation Total duration m₁T is₁Time;

m₂ intelligent irrigation mode 1 semi-field irrigation co-duration m₂T is₂Time;

m₁₀smart irrigation mode 2 global irrigation total duration m₁₀T is₁Time;

m₂₀intelligent irrigation mode 2 semi-field irrigation co-duration m₂₀T is₂Time;

description of the drawings: the intelligent irrigation mode mainly controls the irrigation water quantity of a green belt, namely the water spraying quantity of an irrigation nozzle, and aims to accurately control the water spraying quantity under the conditions of covering the area of the whole green belt and saving water, because the lower the frequency of a water pump is, the lower the rotating speed of the irrigation water pump is, and the corresponding pressure and flow are naturally reduced, the working power of the irrigation water pump is controlled by adopting a variable-frequency driver, namely the water pressure of the irrigation nozzle can be controlled, so that the spraying distance and flow of the irrigation nozzle can be controlled, and the system can adjust the output value of the variable-frequency driver according to the actual condition to finally control the spraying state of the irrigation nozzle, namely the spraying distance and the spraying flow; the conversion coefficient K between the control frequency of the variable frequency drive and the output pressure of the irrigation pump is obtained from a performance curve provided by a manufacturer, the relation is a natural law of the water pump in physics and is a relatively stable relation value, the flow is approximately in direct proportion to the frequency, and the pressure is approximately in direct proportion to the square of the frequency. The static error compensation coefficient of the variable frequency driver is adjusted within a given value range when a variable frequency driver manufacturer delivers from a factory for debugging so as to adapt to different irrigation pumps; in order to uniformly irrigate the water to the whole green belt, a global and half-domain alternative irrigation mode is adopted, so that the condition that water is unevenly distributed due to the fact that only the outer ring of the green belt is irrigated is avoided, and the global and half-domain irrigation nozzles are specifically sprayed to the areas with the distance between the outermost boundary and the half distance between the outermost boundary of the green belt; the standard irrigation water quantity of the primary irrigation of the green belt is the minimum irrigation water quantity calculated according to the area of the green belt and the density of the plants, after the primary irrigation is finished, waiting for a period of time, and if the relative humidity of soil still does not reach the minimum standard, performing secondary irrigation until the relative humidity of the soil reaches the minimum standard; because the duration of the whole domain and the half domain is a fixed value each time no matter preset or adjusted, the standard irrigation water quantity of the green belt for one-time irrigation is not necessarily completely equal to that of the green belt each time, so that the standard irrigation water quantity is expressed as approximately equal to that of the green belt, but the error of the whole domain and the half domain is +/-5%.

The beneficial technical effects are as follows: this system improves traditional artifical irrigation into intelligent irrigation system, and the water economy resource saves a large amount of manpowers, material resources, improves work efficiency, reduces various operation costs. Meanwhile, under the condition of saving water resources to the maximum extent, the optimal water source condition is provided for the plants, and the healthy growth of the plants is ensured.

Example 3

This embodiment is a simplified scheme based on the best standard scheme with the best control of the functions of embodiment 2, and aims to promote the scheme in a wide range and further reduce the matching cost.

The main simplifications are as follows:

(1) the opening and closing of the rainwater collecting port are controlled by the electromagnetic valve, and the control scheme of the part is replaced by a simplified version which also realizes the functions, namely: the principle of the automatic water drain valve adjusted by the spring tension or the balancing weight is that the valve is automatically opened after the gravity of water exceeds the closing acting force of the spring tension or the balancing weight on the valve, otherwise, the valve is automatically closed. Although the water drain valve is also installed at the bottom of the horizontal section of the drainage pipeline of the municipal road, the control link of an electromagnetic valve is omitted, the opening and the closing of the rainwater collection port are realized by adopting a pure mechanical structure, the control precision is poor, the stability and the durability of the mechanical structure are reduced, the wiring installation is simple and convenient, the later maintenance is convenient, and the like, and the water drain valve belongs to a feasible technical scheme after the balance among the cost, the later maintenance, the failure rate and the control precision.

(2) Because the control link of the electromagnetic valve is cancelled, the infrared sensor is also cancelled, the cost is further saved, and the integral failure rate of the system is reduced.

(3) The frequency conversion driver controls the irrigation water pump to be an actuator, the direct-current frequency conversion water pump in the existing mature technology is integrally replaced, but the control method and the strategy are not changed, the integral replacement has the advantages of cost saving, and more importantly, the advanced mature technology and the control advantage of the frequency conversion water pump and the later-stage additional expansion function are utilized.

The variable frequency control is performed based on a closed loop control concept. The closed-loop control is a control method of performing correction based on feedback of an output of a control target, and the correction is performed by a rate or a standard when a deviation between an actual value and a planned value is measured. In the closed-loop control, a control signal is taken out from the change of the output quantity and fed back to an input end as a comparison quantity to control the input quantity, and the phase of the taking-out quantity is generally opposite to that of the input quantity, so that the closed-loop control is called negative feedback control, and the industrial automatic control is generally based on a closed-loop control concept. In a simple way, the closed-loop control principle of the variable-frequency water pump is to compare an actual set target pressure value with a current actually detected pressure value, and change the difference value to approach zero through a series of function algorithms. In the variable frequency speed regulation process of the water pump equipment, when the water pressure is reduced quickly, the speed regulation process of the frequency converter is accelerated, otherwise, the speed is reduced. The variable frequency water pump has the advantages that:

the variable frequency pump is flexibly controlled: supplying water in sections, supplying water at regular time, and manually selecting a working mode;

secondly, the frequency conversion pump saves electricity: the optimized energy-saving control software enables the water pump to realize energy-saving operation to the maximum extent;

saving water by using a variable frequency pump: the pressure of the pipe network is set according to the actual water use condition, the water outlet quantity of the water pump is automatically controlled, and the water leakage and leakage phenomena are reduced;

fourthly, the variable frequency pump runs reliably: the frequency converter realizes the soft start of the pump, so that the water pump realizes the non-impact switching from power frequency to frequency conversion, thereby preventing the impact of a pipe network, avoiding the pressure of the pipe network from exceeding the limit and the breakage of a pipeline;

the self-protection function of the variable frequency pump is perfect: if a certain pump breaks down, the alarm information is actively sent to an upper computer, and meanwhile, a standby pump is started to maintain water supply balance. In case of failure of the automatic control system, the user can directly operate the manual system to protect water supply;

sixth, frequency conversion pump networking function: the frequency conversion pump adopts Chinese industrial control configuration software, and real-time each station, such as voltage, current, working frequency, pipe network pressure and flow and the like of the motor. And the power consumption of each station can be accumulated, the water output of each pump can be accumulated, and various printed reports can be provided for analysis and statistics.

(4) The soil temperature sensor and the soil humidity sensor in the system are combined to adopt the special soil temperature and moisture sensor, so that system components and installation steps are simplified, the system cost is saved, the matching difficulty of the soil in a special working environment is reduced, the detection precision of the sensor is improved, and a foundation is laid for subsequent intelligent control.

The system adopts a professional soil temperature and moisture sensor with the model of RS-WS-N01-TR, the sensor is suitable for measuring the soil temperature and moisture, and three relation models with representative soil moisture content (theta _ v) and dielectric constant (K _ a) and the applicability of various models are analyzed by comparing various types of soil through researching the dielectric properties of several types of soil in China and analyzing the physical and chemical properties of the soil which possibly cause the difference. In the test, indoor soil columns are filled, a series of water contents from drying to saturation are obtained from different soils, and then TDR (time domain reflectometry) is carried out. In order to improve the measurement accuracy, a calibration formula of theta _ v and K _ a of eight kinds of soil is established according to the actual water content and the measured dielectric constant. The accuracy of the measured water content after correction is improved by 3-5 times compared with the accuracy of the traditional measuring method. The sensor has high precision, quick response, stable output and less influence by the salt content of the soil, and is suitable for various soil qualities. Can be buried in soil for a long time, is resistant to long-term electrolysis and corrosion, is vacuumized and encapsulated, and is waterproof and corrosion-resistant. The sensor adopts a 485 signal protocol, and the control chip adopts an imported processor 16-bit high-precision AD, so that the sampling precision and 64M master frequency are ensured, and the high-efficiency operation speed is ensured.

The buried measuring method of the soil temperature and moisture sensor comprises the following steps:

(1) vertically inserting the sensor steel needle into a pit of about 20cm, horizontally inserting the sensor steel needle into the pit, and burying and compacting;

(2) after the sensor is stable for a period of time, the long-time measurement and recording can be continued.

The key device models used in this embodiment are shown in the following table.

Compared with the prior art, the intelligent irrigation system improves the traditional artificial irrigation into an intelligent irrigation system, saves water resources, saves a large amount of manpower and material resources, improves the working efficiency and reduces various operation costs. For example, the irrigation of the expressway green isolation belt is generally carried out in the peak period of the road in the daytime, the water truck irrigation seriously influences the road traffic capacity, the road occupation time per kilometer year is 240h according to the calculation of irrigating 15 times per year and 2 shifts per time for the expressway green isolation belt at present, the road occupation time per kilometer year is equivalent to 1/36 per year, and thus the method brings great economic loss, which is only a simple conservative estimation of time cost, and various operation costs of other manpower and material resources are not calculated.

Meanwhile, the invention provides the best water source condition for the plants under the condition of saving water resources to the maximum extent, thereby ensuring the healthy growth of the plants.

The following table is a statistical table of the optimal irrigation water volume (cubic meters per mu) of a certain plant under different temperature (DEG C) and humidity (RH) conditions.

The above table also fully shows that the plants do not need irrigation at any time or need a fixed water amount forever, but the water requirements are different under different temperature and humidity conditions and are related to seasons and illumination, but the most direct influence condition is the temperature and humidity of soil, and the invention intelligently adjusts irrigation according to the plant growth conditions in different types and modes according to different conditions, and accurately controls the work of the whole irrigation system in the plant coverage range, such as irrigation time, duration, interval time, coverage range, sectional irrigation and other various indexes and parameters needing coordinated and cooperative control, so that the optimal water source condition is provided for the plants under the condition of saving water resources to the maximum extent, and the purpose and good effect of ensuring the healthy growth of the plants are achieved.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (4)

1. The utility model provides a system for water resource collection recycles which characterized in that: the system comprises a water resource collecting device, a water storage device water quantity sensor, a water using device and a water using state acquisition sensor which are all connected with a controller, wherein the water resource collecting device, the water storage device and the water using device are connected by pipelines;

the controller is used for receiving the acquisition information of the water quantity sensor and the water using state acquisition sensor of the water storage device and respectively controlling the water resource collection device and the water using device to be opened and closed;

the water resource collecting device is used for collecting water resources, such as rainwater;

the water storage device is used for storing water resources;

the water storage device water quantity sensor is used for detecting the residual water storage space of the water storage device;

the water using device is used for using water resources;

the water use state acquisition sensor is used for detecting whether a water resource using object needs to use water or not;

the connecting pipeline is used for transporting water resources.

2. An irrigation system is collected to municipal rainwater which characterized in that: the rainwater irrigation system comprises an infrared sensor, a soil temperature sensor, a soil humidity sensor, a solenoid valve, a variable frequency driver and a water level sensor which are all connected with a central controller, wherein the solenoid valve is connected with a rainwater collecting opening, the variable frequency driver is connected with an irrigation water pump, and the rainwater collecting opening, a water storage tank and an irrigation spray head are connected through pipelines;

the central controller is used for receiving real-time monitoring data of the infrared sensor, the soil temperature sensor, the soil humidity sensor and the water level sensor, performing calculation and analysis through a specific internal algorithm, sending an instruction to the electromagnetic valve and the variable frequency driver according to a preset control strategy, and respectively controlling the opening and closing of the rainwater collecting port and the switching and power of the irrigation water pump;

the infrared sensor is arranged right above the horizontal section of the municipal road drainage pipe in front of the rainwater collecting port and is used for detecting the rainwater level of the municipal road drainage pipe;

the soil temperature sensor and the soil humidity sensor are buried under the soil surface layer at proper depths and are respectively used for detecting the current temperature and humidity of the soil;

the water level sensor is used for detecting the water level of the current water storage tank;

the electromagnetic valve is used for receiving an instruction of the central controller to control the opening and closing of the rainwater collecting port;

the variable frequency driver is used for receiving an instruction of the central controller to control the on-off and the power of the irrigation water pump;

the rainwater collecting port is used for collecting rainwater in the municipal road drainage pipeline and is arranged at the bottom of the horizontal section of the municipal road drainage pipeline;

the irrigation water pump is used for pumping out water in the water storage tank, and conveying the water to an irrigation spray head through a pipeline for irrigation;

the irrigation spray heads are arranged at a certain height right above the half width of the municipal road green belt, and are arranged in a plurality according to the length of the green belt, and are used for spraying and irrigating the green belt.

3. A municipal rainwater harvesting and irrigating system according to claim 1, wherein: the specific internal algorithm and the control strategy applied to the municipal rainwater collection and irrigation system are combined to obtain a control mode according to the rainwater amount in a municipal road drainage pipeline, the soil state of a green belt, the total capacity of a water storage tank and the residual capacity, wherein the control mode comprises the following steps:

(1) rainwater collection mode

The formula of the current cross-sectional area of rainwater passing through the municipal road drainage pipeline is as follows:

① when H > R, the compound,

② when H < R,

③ when H is R, A is 0.5 pi R²

Wherein A-rainwater passes through the current cross-sectional area of the municipal road drainage pipeline;

r-radius of municipal road drainage pipe;

the distance between the right upper part of the drainage pipeline and the water surface is detected by an H-infrared sensor;

the opening and closing conditions of the rainwater collecting port are as follows:

① when A is more than or equal to A₀And t is greater than or equal to t₀When the rainwater collecting port is opened;

② when A < A₀Or t < t₀When the rainwater collecting port is closed, the rainwater collecting port is closed;

wherein A is₀-opening the cross-sectional area of the water flow corresponding to the lowest level of the rainwater collection port;

t-the current duration of the rainwater passing through the municipal road drainage pipeline;

t₀-minimum rainwater elapsed duration of opening of the rainwater collection opening;

(2) intelligent irrigation mode

Intelligent irrigation starting conditions are as follows:

when R is less than or equal to R₀₁When the intelligent irrigation mode 1 is started, the intelligent irrigation mode is started;

when R is not less than R₀₁And T is not less than T₀₁When the intelligent irrigation mode 2 is started, the intelligent irrigation mode is started;

the intelligent irrigation closing condition is as follows:

when R is not less than R₀₂When the intelligent irrigation mode 1 is closed, the intelligent irrigation mode is switched off;

when R is not less than R₀₁And T is less than or equal to T₀₁When the intelligent irrigation mode 2 is closed;

wherein R-the current measured relative humidity of the soil;

R₀₁-a minimum value for soil relative humidity suitable for the green belt;

R₀₂-maximum soil relative humidity suitable for green belts;

t-the currently measured soil temperature;

T₀-maximum suitable soil temperature for green belts;

③ Intelligent irrigation mode 1

The irrigation is carried out in a mode of alternately carrying out the irrigation at equal time intervals of a global area and a half area, and specific control parameters and output values are as follows:

a. the water pressure standard values required by the global irrigation form are as follows:

b. the standard water pressure value required by the semi-regional irrigation form is as follows:

wherein, P₁-a global irrigation form required water pressure normalized value;

P₂-semi-irrigation profileThe water pressure standard value required by the formula;

ρ -density of water;

b-width of green belt;

g-acceleration of gravity;

h-the height value of the spray head higher than the surface layer of the soil;

the output value of the corresponding variable frequency driver for controlling the irrigation pump is as follows:

a. the output value of the frequency conversion driver control irrigation water pump corresponding to the global irrigation form is as follows:

b. the output value of the frequency conversion driver control irrigation water pump corresponding to the global irrigation form is as follows:

wherein f is₁-controlling output theoretical values of a variable frequency drive corresponding to global irrigation;

f₂-controlling output theoretical values of variable frequency drives corresponding to half-field irrigation;

-variable frequency drive static error compensation coefficients;

k-conversion coefficient between control frequency of the variable frequency driver and output pressure of the irrigation water pump;

the duration rules for global and semi-local irrigation are: the global and the half-domain alternate circulation irrigation satisfies the following relation;

therefore, the output sequence of the variable frequency driver is controlled by the central controller to be in a group of wave forms according to the first output frequency f₁Duration t of signal₁Time, re-output frequency f₂Duration t of signal₂Time, the two are alternately output until a stop signal is input;

intelligent irrigation mode 2

The intelligent mode 2 only achieves the effect of cooling through a small amount of irrigation, so that the irrigation water amount is small, the irrigation is carried out in a mode of dividing into three times, wherein the irrigation water amount is 5% of the standard irrigation water amount and the irrigation water amount is 15% of the standard irrigation water amount, the irrigation is carried out in a mode of alternately carrying out global irrigation and half-field irrigation at equal time intervals, and the following relation is met;

Q₀-standard irrigation water amount for one irrigation of green belt;

n-the number of nozzles of the irrigation spray head;

a-the cross section area of a nozzle of the irrigation nozzle;

t₁-duration of each time of global irrigation;

t₂-duration of each half-field irrigation;

m₁smart irrigation mode 1 Global irrigation Total duration m₁T is₁Time;

m₂intelligent irrigation mode 1 semi-field irrigation co-duration m₂T is₂Time;

m₁₀smart irrigation mode 2 global irrigation total duration m₁₀T is₁Time;

m₂₀intelligent irrigation mode 2 semi-field irrigation co-duration m₂₀T is₂Time.

4. A computer-readable storage medium having stored thereon a computer program, characterized in that: the program when executed by the processor performs the steps of functioning a municipal rainwater collection and irrigation system of claim 2 by:

(1) detecting whether rainwater flows into municipal drainage pipelines or not;

(2) if rainwater flows into a municipal drainage pipeline, whether the water storage tank has residual space is checked, if so, an opening command is sent to an electromagnetic valve, and a rainwater collection port is opened;

(3) when the water storage pool has no residual space, sending a closing command to the electromagnetic valve, and closing the rainwater collection port;

(4) detecting whether the soil temperature and humidity data exceed a set value or not, if so, sending an opening instruction and a corresponding control instruction to an irrigation water pump, controlling the irrigation water pressure, the irrigation time, the irrigation frequency and the irrigation interval time of the irrigation water pump, and carrying out irrigation operation;

(5) and after the irrigation is finished, sending a closing instruction to the irrigation water pump to finish the irrigation.

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