CN207541522U - A kind of intelligent control planting shed - Google Patents

Abstract

The utility model provides a kind of intelligent control planting shed, including digital signal processor, temperature and Humidity Control module, carbon dioxide control module, illumination control module, zigbee wireless modules and control panel, the temperature and Humidity Control module, carbon dioxide control module and illumination control module are connect with digital signal processor and zigbee wireless modules, the control panel connects digital signal processor, and the temperature and Humidity Control module includes Temperature Humidity Sensor, heater, wind turbine, variable-frequency governor and water pump；The carbon dioxide control module includes carbon dioxide sensor, dry ice box and steering engine；The illumination control module includes photosensitive sensor, plant growth LED light and constant-current source.The utility model realize to greenhouse gardening to humiture, carbon dioxide, illumination accurate control.

Description

An intelligent control planting shed

technical field

The utility model relates to a greenhouse planting technology, in particular to an intelligent control planting shed.

Background technique

With the rapid development of high-tech such as network technology, computer technology, sensor technology and biotechnology, the greenhouse environment control has ushered in a revolution in the period of intelligent development. At present, people's living standards are improving day by day, and the market for vegetables in greenhouses in winter is expanding day by day, especially in northern regions, vegetables are cultivated in plastic greenhouses in the cold winter.

As the most dynamic new agricultural industry in the 21st century, the vegetable greenhouse industry is highly automated and intelligent in environmental control. It is inevitable for the development of modern greenhouses. At present, my country's modern greenhouse manufacturing industry is developing in the direction of specialization, socialization and market internationalization.

There are already many intelligent greenhouse control systems, which are developed by combining high-tech means such as integrated sensing technology, automatic control technology, communication technology, and ARM control technology. By building an intelligent greenhouse processor, the humidity, temperature, light, Automatic monitoring and control of environmental factors such as carbon dioxide. However, with the intensification of environmental problems, the requirements for the control of various planting conditions are getting higher and higher, especially for plants in the seedling stage; the existing control system for greenhouse planting has a large fluctuation range of condition control and cannot adapt to certain conditions. The special requirements of plants, or the requirements of some special periods, such as the germination period, cause the problem of low survival rate and increase the cost of planting.

Contents of the invention

The utility model solves the technical problems existing in the prior art and provides an intelligent control device for greenhouse planting with simple structure and high control precision for temperature, humidity, carbon dioxide and light parameters.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions:

An intelligent control planting shed includes a greenhouse support, a digital signal processor, a temperature and humidity control module, a carbon dioxide control module, a light control module, a zigbee wireless module and a control panel, and the temperature and humidity control module includes a temperature and humidity sensor, a heater, Fan, frequency converter, water pump, nozzle and water tank, the temperature and humidity sensors are respectively arranged in the greenhouse support and the soil, the heater is arranged on the top of the greenhouse support, and the fan, frequency conversion governor and water pump are arranged in the greenhouse One end of the bracket, the frequency conversion governor is connected to the fan and the water pump, the water tank is connected to the water pump, and the water pump is connected to the nozzle;

The carbon dioxide control module includes a carbon dioxide sensor, a dry ice box and a steering gear, and the dry ice box is connected to the steering gear;

The illumination control module includes a photosensitive sensor, a plant growth LED lamp and a constant current source, and the plant growth LED lamp is connected to the constant current source;

Described zigbee wireless module comprises zigbee terminal, zigbee coordinator and computer, described zigbee terminal is wirelessly connected with zigbee coordinator, and described zigbee coordinator is connected with computer;

Described temperature and humidity sensor, carbon dioxide sensor, photosensitive sensor and digital signal processor are connected with zigbee terminal, and described computer and digital signal processor are connected with zigbee coordinator, and described heater, frequency conversion governor, steering gear, constant current The source and control panel are electrically connected to the digital signal processor.

The control panel includes a display and control keys.

The zigbee coordinator uses UART to connect with the computer to monitor the greenhouse data in real time.

The digital signal processor adopts PWM to control the constant current source.

The beneficial effects of the utility model are: the utility model has the advantages of automation, intelligence, low cost, convenient control, practicality, and remote monitoring, and realizes precise control of plant growth parameters such as temperature, humidity, carbon dioxide concentration and light intensity, The survival rate and yield of greenhouse planting are improved, labor is saved, and planting costs are reduced.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a frame schematic diagram of an intelligent control planting shed of the present invention.

Fig. 2 is a structural schematic diagram of an intelligent control planting shed of the present invention.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the utility model.

Referring to Figures 1 and 2, an intelligent control planting shed includes a greenhouse support 1, a digital signal processor 2, a temperature and humidity control module 3, a carbon dioxide control module 4, a lighting control module 5, a zigbee wireless module 6 and a control panel 7 , the temperature and humidity control module 3 includes a temperature and humidity sensor 31, a heater 32, a fan 33, a frequency converter 34, a water pump 35, a nozzle 36 and a water tank 37, and the temperature and humidity sensor 31 is respectively arranged on the greenhouse support 1 and the soil Among them, the heater 32 is arranged on the top of the greenhouse support 1, the fan 33, the frequency converter 34 and the water pump 35 are arranged at one end of the greenhouse support 1, and the frequency converter 34 is connected with the fan 33 and the water pump 35, so The water tank 37 is connected with a water pump 35, and the water pump 35 is connected with the shower nozzles 36 evenly distributed in the shed;

The carbon dioxide control module 4 includes a carbon dioxide sensor 41, a dry ice box 42 and a steering gear 43, and the dry ice box 42 is connected to the steering gear 43;

The illumination control module 5 includes a photosensitive sensor 51, a plant growth LED lamp 52 and a constant current source 53, and the plant growth LED lamp 52 is connected with the constant current source 53;

Described zigbee wireless module 6 comprises zigbee terminal 61, zigbee coordinator 62 and computer 63, and described zigbee terminal 61 is wirelessly connected with zigbee coordinator 62, and described zigbee coordinator 62 is connected with computer 63;

Described temperature and humidity sensor 31, carbon dioxide sensor 41, photosensitive sensor 51 and digital signal processor 2 are connected with zigbee terminal 61, and described computer 63 and digital signal processor 2 are connected with zigbee coordinator 62, and described heater 32, frequency conversion The governor 34 , the steering gear 43 , the constant current source 53 and the control panel 7 are electrically connected with the digital signal processor 2 .

The control panel 7 includes a display 71 and control buttons 72 .

The zigbee coordinator 62 uses UART to connect with the computer 63 to monitor the greenhouse data in real time.

The digital signal processor 2 uses PWM to control the constant current source 53 .

In order to understand the technical solution of this utility model in more detail, the following is a detailed introduction to the practical application of the device:

Traditional temperature and humidity detection uses thermometers and hygrometers, which need to be checked manually, which is not intuitive. And the detection of CO2 concentration has no way to start. This system selects the temperature, humidity, light intensity and CO2 concentration in the greenhouse as the controlled quantity of the system, among which the temperature and humidity are the main controlled objects, and the heating, humidification, light, fan and other actuators are used as the control means , to regulate the environmental state in the greenhouse, so that the environment in the greenhouse can reach the optimal state of the conditions required for plant growth. The device has two operating modes, manual control mode and automatic control mode. When in the manual control mode, according to the greenhouse environment parameters displayed by the monitor 71 or the computer 63, the action of the manual control actuator can be performed to adjust the environment in the greenhouse to achieve the best environmental conditions for plant growth; when in the automatic control mode, according to the derivation Based on the greenhouse model and control theory, the two parameters of temperature and humidity are used as the main controlled objects, and the two parameters of temperature and humidity in the greenhouse are collected by the temperature and humidity sensor 31 and transmitted to the processor 2 or computer 63, After the processor 2 or the computer 63 gets the data, it uses the multivariable fuzzy control algorithm to analyze the data, and then prompts and issues control commands to control the actions of the actuators, automatically adjust the environmental parameters in the greenhouse, and achieve the best environmental conditions required for plant growth. .

During installation, in order to improve the accuracy of the collected temperature and humidity information, carbon dioxide concentration information and light intensity information in the greenhouse, the temperature and humidity sensor 31 and the carbon dioxide sensor 4 are evenly distributed in the air with a height of 2.5m-3m in the greenhouse. At a position with better circulation, and fixed with the greenhouse support 1, and set to avoid direct sunlight, so as to avoid inaccurate collection results of temperature and humidity information and carbon dioxide concentration information, the other temperature and humidity sensor 31 is set at 1-5cm below the soil to collect The temperature and humidity in the soil layer can accurately control the temperature and humidity of plant growth; the photosensitive sensor 51 is set in the greenhouse with a height of 2.5m-3.5m in direct sunlight; the temperature and humidity sensor 31, the carbon dioxide sensor 41 and the photosensitive sensor 51 are respectively connected Zigbee terminal 61, heater 32, frequency converter 34, steering gear 43, constant current source 53, control panel 7 and digital signal processor 2 are linearly connected, and signals are collected by temperature and humidity sensor 31, carbon dioxide sensor 41 and photosensitive sensor 51 , transmitted to the zigbee coordinator 62 of the digital signal processor 2 through the zigbee terminal 61, and then transmitted to the computer 63 by the zigbee terminal 61 of the digital signal processor 2, or directly transmitted to the zigbee coordinator 62 of the computer 63 by the terminal of each sensor According to the parameters set in the digital signal processor 2 or the computer 63, the work of each module is controlled.

In the application, TMS320F28335 digital signal processor 2 is used as the main controller. This device is mainly composed of temperature and humidity control module 3, CO2 concentration control module 4, light intensity control module 5 and ZigBee wireless module 6. Among them, the temperature and humidity control module collects temperature and humidity, and feedback controls the corresponding heating and humidifying equipment of the water pump 35, fan 33 and heater 32; the CO2 concentration control module partially collects temperature and humidity, and feedback controls the corresponding steering gear 43 that increases the CO2 concentration And dry ice box 42, and the blower fan 33 equipment that cooperates; Illumination control module 5 collects illumination intensity, the illumination intensity of feedback control plant growth LED lamp 52; Module 6 collects environmental parameters through the terminal and wirelessly transmits the environmental parameters to the ZigBee coordinator 62. The digital signal processor 2 accepts signal processing and sends control instructions, or the ZigBee coordinator 62 transmits to the computer 63 through UART to monitor the greenhouse and grasp it in real time. growth environment.

When in use, directly plug in the 220V power supply, and supply power to each module through the power supply module. This device includes automatic mode and manual mode, select the button to enter automatic mode or manual mode. Among them, after entering the automatic mode, the system will intelligently control the environmental parameters of the vegetable greenhouse, and automatically control the temperature and humidity, CO2 concentration and light intensity required by the vegetable greenhouse environment, and control them within the optimum range. If you enter the manual mode, you can manually set the environmental parameters by pressing the button. The system will automatically adjust according to the set environmental parameters to realize the increase of temperature, the decrease of temperature, the increase of humidity, the decrease of humidity, the increase of light intensity, and the increase of light intensity. The reduction of CO2 concentration, the increase of CO2 concentration, the operation of the reduction of CO2 concentration.

The temperature and humidity sensor 31 uses a DHT11 temperature and humidity sensor, which is located at each detection point in the greenhouse. The data collected by the DHT11 temperature and humidity sensor 31 is transmitted to the zigbee coordinator 62 of the MS320F28335 digital signal processor 2 or computer 63 through the zigbee terminal 61. The signal processor 2 compares with the set parameters, sends a control signal, sends instructions to the frequency converter 34, controls the operation of the fan 33 and the water pump 35, and the operation of the heater 32, thereby accurately controlling the temperature and humidity in the greenhouse to save energy ,cut costs. When the temperature in the greenhouse was high, the digital signal processor 2 controlled the blower fan 33 to perform ventilation and heat dissipation, and simultaneously controlled the water pump 35 to spray water in an appropriate amount through the nozzle 36 within the humidity range to lower the temperature; when the temperature was low, turn on the heater 32 to increase the temperature. Greenhouse temperature; the heater 32 is powered by 220V, adopts non-contact switch, has a special optocoupler isolation, has the characteristics of high operating frequency, long life, fast switching speed, relatively low noise, relatively reliable action and no spark. Only need 3-32VDC control voltage, the load voltage can reach 24-480VAC, and the control is simple, the control principle is simpler than ordinary relays, only need to output high and low levels through the I/O port to control the on and off of the output, control High precision and high security.

For the control of carbon dioxide concentration, carbon dioxide sensor 41 uses MG811 solid electrolyte sensor to detect carbon dioxide concentration, which can detect the change of carbon dioxide concentration in the range of 1ug/g; when designing the circuit, the output impedance of the sensor can also be reduced until the common multimeter can measure it. The rear end is connected to the upper stage impedance change circuit. The digital signal processor collects the analog output voltage of the carbon dioxide sensor through A/D, and the lower the concentration, the higher the output voltage. The generated voltage signal is then sent to the steering gear by the digital signal processor as a PWM signal, and the steering gear controls the switch state of the dry ice box for storing dry ice, thereby controlling the release of carbon dioxide to control the concentration; the steering gear model is MG995, the steering gear The control signal cycle is a PWM signal of 18-20ms, wherein the pulse width is from 0.5-2.5ms, the corresponding steering wheel position is 0-180°, and the change is linear; the digital signal processor 2 provides a certain pulse to the steering gear 43 Wide, the steering gear 43 drives the opening of the dry ice box 42 to maintain a certain angle, releases carbon dioxide outward, changes the output angle according to the provided PWM, and achieves the purpose of accurately controlling the concentration of carbon dioxide.

The collection of light intensity adopts BH1750FVI photosensitive sensor 51 . The detector is a digital photosensitive sensor 51 used for the I2C bus interface, which collects the illuminance of the greenhouse and feeds it back to the digital signal processor 2 to control the constant current source 53 to ensure that the plant growth LED lamp 52 maintains a certain illuminance, reaching The purpose of accurately controlling the light intensity. For the control of light intensity, traditional plant growth lights can only be controlled by manual switches, and cannot automatically adjust the light intensity. Using a single-chip microcomputer to control the constant current source 52 of the plant growth LED lamp 52 to control the light intensity can realize automatic control of the light intensity. The front-end AC-DC part uses synchronous rectification technology instead of the rectifier bridge, that is, the power MOSFET is used instead of the power diode as the rectifier element, so as to realize the DC/DC converter with small on-state voltage drop of the output rectifier tube, low power dissipation and high efficiency. The power MOSFET is a voltage-type control device. When it is used as a rectification element, the phase of the control voltage and the voltage to be rectified must be synchronized to complete the rectification function, so it is called a synchronous rectification circuit. After that, the isolated output is used to obtain the required power to realize the dimming control of the plant growth LED lamp 52, and the constant current source 53 of the plant growth LED 52 adopts a single-ended flyback main topology. The structure of the plant growth LED lamp 52 is simple, the conversion efficiency is high, the cost is low, and multiple outputs can be provided at the same time. Among them, the current sampling circuit uses TI's INA193. When using it, the sampling resistor is connected to the non-inverting input terminal of the 3-pin internal op amp and the reverse input terminal of the 4-pin internal op amp, and the working voltage is added, and 1 pin can be output and monitored. The current is proportional to the voltage, the current is monitored, and then the digital signal processor 2 collects the signal through A/D sampling, and adjusts it through the PID algorithm to realize the constant current control of the plant growth LED lamp 52 . The plant growth LED light 52 can be a 3W LED plant growth light. The plant growth LED light 52 is mainly composed of red light and blue light, and uses light bands sensitive to plants. The wavelength of 450-460nm and 460-470nm is used to keep the photosynthesis of plants in the best state, not only to supplement light for plants, but also to promote the differentiation of multiple side branches and buds, to accelerate the growth of roots, stems and leaves, and to promote the accumulation of plant carbohydrates Synthesis and synthesis of vitamins, shortening the growth cycle of plants.

The zigbee wireless module 6 is translated as "Zigbee", which is similar to Bluetooth. It is a novel wireless technology for short-distance communication. This device mainly uses a zigbee coordinator 62 and a zigbee terminal 61 to realize point-to-point communication, allowing users to monitor the data in the greenhouse on the computer 63 in real time. The role of the zigbee coordinator 62 is to establish a network, receive data from the zigbee terminal 61 and send it to the host computer through the serial port. The role of zigbee terminal 61 is to receive control signals from zigbee coordinator 62, collect temperature, humidity, carbon dioxide concentration and light intensity, and send information such as temperature, humidity, carbon dioxide concentration, light intensity and node address to zigbee coordinator 62, through The digital signal processor 2 or computer 63 processes, and the digital signal processor 2 sends corresponding signals to the control equipment of temperature, humidity, carbon dioxide concentration, and light intensity, so as to accurately control the plant growth environment.

The beneficial effects of the utility model are: the utility model has the advantages of automation, intelligence, low cost, convenient control, practicality, and remote monitoring, and realizes precise control of plant growth parameters such as temperature, humidity, carbon dioxide concentration and light intensity, The survival rate and yield of greenhouse planting are improved, labor is saved, and planting costs are reduced.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any change or replacement that is not thought of through creative work should be covered within the scope of protection of the utility model . Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (4)

1. An intelligent control planting shed is characterized in that: it comprises a greenhouse support, a digital signal processor, a temperature and humidity control module, a carbon dioxide control module, a light control module, a zigbee wireless module and a control panel, and the temperature and humidity control module includes a temperature and humidity control module. Humidity sensor, heater, blower fan, frequency conversion governor, water pump, sprinkler head and water tank, described temperature and humidity sensor is respectively arranged in greenhouse support and soil, and described heater is arranged at the top of greenhouse support, and described fan, frequency conversion speed regulation The device and the water pump are arranged at one end of the greenhouse support, the frequency conversion governor is connected with the fan and the water pump, the water tank is connected with the water pump, and the water pump is connected with the nozzle; The carbon dioxide control module includes a carbon dioxide sensor, a dry ice box and a steering gear, and the dry ice box is connected to the steering gear; the light control module includes a photosensitive sensor, a plant growth LED light and a constant current source, and the plant growth LED light is connected to a constant current Source connection; the zigbee wireless module includes a zigbee terminal, a zigbee coordinator and a computer, the zigbee terminal is wirelessly connected to the zigbee coordinator, and the zigbee coordinator is connected to the computer; Described temperature and humidity sensor, carbon dioxide sensor, photosensitive sensor and digital signal processor are connected with zigbee terminal, and described computer and digital signal processor are connected with zigbee coordinator, and described heater, frequency conversion governor, steering gear, constant current The source and control panel are electrically connected to the digital signal processor. 2. An intelligent control planting shed according to claim 1, characterized in that: said control panel includes a display and control buttons. 3. An intelligent control planting shed according to claim 1, characterized in that: said zigbee coordinator uses UART to connect with a computer to monitor the data of the shed in real time. 4. An intelligent control planting shed according to claim 1, characterized in that: the digital signal processor uses PWM to control the constant current source.