CN103314834B - A kind of Green Home plant maintenance control device based on arm processor - Google Patents

Abstract

The invention discloses a green home plant maintenance control device based on an ARM processor, comprising an ARM processor, a precision drip irrigation system, an intelligent light supplement system, a PC, a power module, a camera, a touch screen liquid crystal display, a GPRS module, an intelligent Mobile terminal; precise drip irrigation system, intelligent supplementary light system, PC, camera, and GPRS module are respectively connected to the ARM processor and have two-way communication. The power module is used to supply power to the ARM processor. Display, smart phone terminal and GPRS module communicate through GSM network. The invention uses an LED cold light source as a supplementary light source to make green home plants grow healthily and rapidly; the system of the device has high safety, low cost, and can realize precise drip irrigation; it can be widely used in flower cultivation, miniature vegetable factories and other green home plants. conservation field.

Description

A green home plant maintenance control device based on ARM processor

technical field

The invention relates to a maintenance control device for intelligent maintenance of flowers, vegetables and other household plants, in particular to an ARM processor-based maintenance control device for green household plants.

Background technique

With the development of smart home, people can choose green home plants with four seasons or rich colors according to their own needs in combination with climate, temperature, humidity, color and other comprehensive conditions, and build a place close to nature and detached at any time where people want. natural living environment. Green home plants can not only absorb harmful gases in the air, but also regulate indoor air temperature and humidity. The benefits it brings to people are irreplaceable by other works of art. However, because the indoor environment is relatively humid and dark, the light, water and nutrients needed for the growth of indoor plants are generally difficult to meet.

At present, the commonly used plant maintenance relies on greenhouses, vegetable factories, etc., but because of its large area, it is suitable for sunny and open outdoor areas. Large-area sprinkler irrigation is usually used for plant water replenishment in greenhouses. The disadvantage is that the amount of sprinkler irrigation cannot be accurately controlled, which may easily lead to excessive water replenishment. Disadvantages of supplementary light for plants in greenhouses: At present, most of my country rely on incandescent lamps, tungsten halogen lamps, high-pressure mercury fluorescent lamps, high-pressure sodium lamps, etc. as light sources to supplement plants. These traditional supplementary light methods have energy consumption Too high, unsatisfactory spectral matching, low utilization rate of light energy, and no consideration of the impact of environmental pollution. Existing greenhouse technology is unfavorable for being applied in the actual indoor home furnishing.

Contents of the invention

Aiming at the above-mentioned shortcomings of the plant maintenance devices in the prior art, the present invention provides a green household plant maintenance control device, which can be widely used in the maintenance fields of green household plants such as flower cultivation and micro-vegetable factories.

Technical scheme of the present invention is:

A green home plant maintenance control device based on an ARM processor, including an ARM processor, a precision drip irrigation system, an intelligent supplementary light system, a PC, a power module, a camera, a touch-screen LCD display, a GPRS module, and a smart phone terminal; The precise drip irrigation system, intelligent supplementary light system, PC, camera, and GPRS module are respectively connected to the ARM processor and communicate bidirectionally. The power module is used to supply power to the ARM processor, and the touch-screen LCD is an ARM processor. It has its own display, and the smart phone terminal communicates with the GPRS module through the GSM network.

Further, the precision drip irrigation system includes an ARM processor, a stepper motor driver, a stepper motor, a frequency converter, a submersible pump, a valve, a drip irrigation nozzle, a soil moisture sensor, and an A/D module. A motor driver, a stepper motor, a valve, a drip irrigation nozzle, a soil moisture sensor, and an A/D module are connected in sequence, and the A/D module is connected to an ARM processor, and the ARM processor, a frequency converter, a submersible pump, and a valve are connected in sequence.

Further, the precision drip irrigation system adopts a fuzzy control algorithm for the precision irrigation process of plants.

Further, the intelligent supplementary light system is composed of a detection module and a supplementary light module; the detection module is used for sub-band light intensity; if the detected light intensity is lower than the threshold set by the software, the supplementary light module is started; the supplementary light module The start of the optical module is controlled by the detection module; the supplementary light module is used to process the supplementary light signal sent by the ARM processor to control the brightness of the LED light.

Further, the detection module detects red and blue light intensities through red and blue silicon photodiodes, so that the red and blue light intensities are composed according to 8:1.

The beneficial effects of the present invention are:

1. ARM has fast processing speed, low power consumption, and strong performance. Most chips have integrated SDRAM, LCD and other control devices into the chip. The memory management of the kernel and user space is separated, and the system will not crash due to a single program error by the user. out, so the security of the system is high. Similarly, the Ethernet communication interface of the ARM processor and the TCP/IP protocol development framework realize real-time data communication of the growth status of green household plants at low cost.

2. In order to ensure that the plants grown at home get sufficient water and nutrients indoors, reduce the repetitive labor of manpower, and also prevent the plants from taking too much water and nutrients and being in a sub-healthy state. The present invention designs a precise drip irrigation system. The system uses advanced soil environment sensors, designs fuzzy control algorithms, and accurately controls the opening and closing of stepper motors and valves to achieve the effect of precise drip irrigation.

3. Light conditions have an important impact on the growth rate, yield and quality of plants. At present, most of our country rely on incandescent lamps, tungsten-halogen lamps, high-pressure mercury fluorescent lamps, high-pressure sodium lamps, etc. The disadvantages of low utilization rate and failure to consider the impact of environmental pollution. The present invention solves the problem of driving multiple LED light groups and controlling quantitative supplementary light, and successfully uses LED cold light source as supplementary light source to artificially simulate the sunlight needed for plant growth, so that green household plants grow healthily and rapidly become a possibility.

Description of drawings

Fig. 1 is a kind of structural block diagram of the green home plant maintenance control device based on ARM processor of the present invention;

Fig. 2 is the structural block diagram of precise drip irrigation system in the present invention;

Fig. 3 is the driving circuit diagram of LED lamp group in the present invention;

Fig. 4 is a GPRS remote communication diagram of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , an ARM processor-based green home plant maintenance control device of the present invention consists of a hardware part and a software part. Among them, the ARM processor in the hardware part is connected to the precise drip irrigation system and the intelligent supplementary light system. The ARM processor is connected to the PC through a network cable, and the USB interface is connected to an external camera. The ARM processor is externally connected to a GPRS module, and the GPRS module communicates with the smart phone terminal through the GSM network. The ARM processor comes with a touch-screen LCD display and supplies power to the system through the power module.

The automatic drip irrigation system is mainly composed of ARM processor, stepper motor driver, stepper motor, frequency converter, submersible pump, valve, drip irrigation nozzle, soil moisture sensor, A/D module, etc. Figure 2 is a flow chart of the precise drip irrigation system. First, the control device is powered on and initialized. The humidity sensor detects the soil moisture near the drip irrigation nozzle inserted in the soil. After conversion by the A/D module, the signal is sent to the fuzzy controller in the ARM processor for calculation. According to the fuzzy control algorithm, when it is lower than the humidity threshold set by the ARM processor software, the ARM processor starts the frequency converter and the submersible pump, and according to the fuzzy control algorithm of the ARM processor, controls the driver of the stepping motor to change the stepping speed of the stepping motor. Quantity, control the switch quantity of the valve. The water flows through the pipes and the plants are drip-irrigated by the drip irrigation nozzles. When the humidity detected by the soil moisture sensor is higher than the set threshold, the device is turned off and the drip irrigation ends. The fuzzy control algorithm here chooses soil moisture and processor output signal pulse number as two fuzzy variables. Since a certain number of pulses corresponds to a certain rotation angle of the stepping motor, and the rotation angle of the motor is equivalent to the valve opening, it is considered to analyze the output signal pulse of the ARM control device as another fuzzy variable to replace the expected rotation angle of the motor.

Fuzzy control algorithm: Since a certain number of pulses corresponds to a certain stepping motor rotation angle, and the motor rotation angle is equivalent to the valve opening, consider replacing the desired motor rotation angle with the output signal of the ARM processor as a fuzzy variable for analysis. According to the range of soil moisture suitable for plant growth, the soil moisture value is fuzzy, the fuzzy control area of the system is set, and the humidity threshold is set. Calculate the humidity difference. The fuzzy subsets describing the linguistic values of input variables and output variables are {negative maximum, negative large, negative medium, negative medium, negative small, negative small, zero, positive small, positive small, positive center, positive medium, Zhengda, Zhengda is extremely large}. Quantify the domain of error (E) into 13 levels, namely {-6, -5, -4, -3, -2, -1, 0, +1, +2, +3, +4, +5, + 6}. Get E, U fuzzy control table. Among them, E represents the humidity error level, the area range is the set value, and U represents the rotation angle of the valve. The system will determine the rotation angle of the valve according to the water demand in different stages of irrigation and the error value of humidity in the actual situation. As the soil moisture changes, the valve opening also changes. When the humidity is the lower limit of the area, the soil humidity is close to the critical state, and irrigation is urgently needed. At this time, the valve opening should be larger to supply water in time. When the soil water is close to saturation, in order to maximize water saving and avoid loss and evaporation, the valve should be closed in time. Considering that it takes a certain amount of time to close the valve, the smaller the action angle when closing, the better. The fuzzy control algorithm is used to perform precise drip irrigation on plants. It greatly reduces the repetitive labor of manpower, and also prevents plants from taking too much water and nutrients.

The research found that: 400-520nm (blue) light and 610-720nm (red) light contribute the most to photosynthesis. Red light is beneficial to the synthesis of plant carbohydrates and can accelerate the development of long-day plants. Blue-violet light accelerates the development of short-day plants and promotes the synthesis of proteins and organic acids. Short-wave blue-violet light and ultraviolet light can inhibit the elongation of stem internodes and promote the growth of multiple lateral branches and buds. Therefore, in the design of the present invention, red and blue LED lights are used as the light source of plant lights, and the ratio of using red and blue LED lights is 8:1. After testing, the wavelength of synthetic light at this time is the best for plant photosynthesis. The ideal spectral range coincides.

The intelligent supplementary light system consists of a detection module and a supplementary light module.

The light detection in the detection module is divided into red light intensity detection and blue light intensity detection, using blue light silicon photodiodes with a wavelength range of 400-500nm and red light silicon photodiodes with a wavelength range of 600-700nm as detection elements. Then use 4 operational amplifiers TL084 to respectively convert and amplify the weak analog signal of the silicon photodiode collected, and finally send the analog signal to the A/D module, and finally send the converted data to the ARM processor for calculation and analysis, so as to realize Sub-band light intensity detection. If the detected light intensity is lower than the threshold set by the software, the supplementary light module is activated.

The supplementary light module includes LED light group and its drive circuit. The drive circuit adopts PT4115 chip drive module circuit, and the red light module light group and the blue light module light group are respectively designed, and the two module light groups work independently. The schematic diagram is shown in Figure 3. Among them, the LED lamp group adopts a narrow-band red LED array with a rated power of 1W and a central wavelength of 660nm and a narrow-band blue LED array with a central wavelength of 450nm. When the system enters the state of automatic quantitative supplementary light, the actual supplementary light quantity is calculated according to the software algorithm in the ARM controller, and then the duty cycle of the corresponding two-way PWM1 and PWM2 signals is controlled according to the supplementary light quantity, and finally the ARM processor respectively Send the generated PWM1 signal and PWM2 signal to the DIM control terminal of the red light module and the blue light module drive circuit PT4115 chip respectively. The output current of the drive chip PT4115 is controlled by the 2-way PWM signal, and finally the brightness of the LED lamp is controlled. The light wavelength synthesized by the red light module and the red and blue LED lights in the blue light module in 8:1 coincides with the best ideal spectral range of plant photosynthesis, realizing the functions of convenient, energy-saving and accurate light supplement for green home plants.

The remote monitoring of the maintenance control device, the main equipment includes camera, GPRS module, Ethernet interface and TCP/IP protocol of ARM processor. Among them, the GPRS module communicates with the whole system through the GPRS terminal. After the system receives the call from the smart phone terminal, it will automatically hang up the call first, and then reply the humidity, light and other information of the plants on the plant wall to the smart phone terminal in the form of a text message to give back to the user. The use of TCP/IP protocol allows users to know the health status of plants in the plant wall in real time, such as moisture, nutrients, and light, through a PC.

Ordinary smartphone terminals can communicate with the entire system through the GPRS terminal composed of ARM processor and GPRS module. As shown in Figure 4. After the system receives the call from the smart phone terminal, it first hangs up the call automatically, and then replies to the smart phone terminal in the form of a text message to give back to the user. SMS reply content:

Green home plant maintenance monitoring device

Air temperature: XX Air humidity: XX Soil humidity: XX Light: XX Security: XX

The growth status of green household plants can be displayed in real time through the touch screen liquid crystal display. The ARM processor is connected to the PC through the network cable, and the access of the camera is also convenient for users to use the PC to video monitor the growth of the plants in the entire plant wall, and can also control the operation of the precise drip irrigation system and the intelligent supplementary light system. can be resolved in time.

The maintenance control device of the present invention is simple in structure, convenient in operation, intelligent and effective, not only solves the problems of moisture, nutrition, light and the like required for the growth of green home plants, but also can be widely used in modern smart home society. Among them, the present invention designs a maintenance control device with an ARM processor as the core, wherein the control device includes an advanced precision drip irrigation system, an intelligent light supplement system, and a remote monitoring system is added. The use of these technologies reduces labor and largely solves the problems of indoor flower cultivation and green vegetable cultivation. Relying on the Ethernet communication interface and TCP/IP protocol of the ARM processor inside the control device, the collection and real-time communication of data such as soil moisture and surrounding environmental information of green household plants in the planting module are realized, and video remote monitoring is realized to grasp the health status of plants.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. based on a Green Home plant maintenance control device for arm processor, it is characterized in that: comprise arm processor, precision drip irrigation system, Intelligent supplemental lighting system, PC, power module, camera, touch screen liquid crystal display, GPRS module, intelligent mobile phone terminal; Described precision drip irrigation system, Intelligent supplemental lighting system, PC, camera, GPRS module are connected with arm processor and two-way communication respectively, described power module is used for powering to arm processor, described touch screen liquid crystal display is that arm processor carries display, and described intelligent mobile phone terminal and GPRS module are by GSM network communication; Described precision drip irrigation system adopts FUZZY ALGORITHMS FOR CONTROL to the precision of plant process of irrigating, that is: the motor anglec of rotation of expectation is replaced with the output signal of arm processor, analyze as a fuzzy variable; According to the soil moisture range of suitable for plant growth, by the gelatinization of soil moisture Numerical-Mode, initialization system fuzzy control district, setting humidity threshold; Calculate psychrometric difference; The fuzzy subset describing the Linguistic Value of input variable and output variable be { negative maximum, negative large, in negative bias, in negative, negative bias is little, negative little, zero, just little, just less than normal, to hit exactly, in positively biased, honest, positive maximum }; Humidity error domain is quantified as 13 grades, namely {-6 ,-5 ,-4 ,-3 ,-2 ,-1,0 ,+1 ,+2 ,+3 ,+4 ,+5 ,+6}; Draw E, U fuzzy control table, wherein, E represents humidity error rank, and regional extent is setting value, and U represents the anglec of rotation of valve; System, according to irrigating different phase water requirement and humidity error value under actual conditions, determines the anglec of rotation of valve; Along with the change of soil moisture, valve opening is also along with change; Under humidity is regional extent in limited time, soil moisture, close to critical condition, is badly in need of irrigating, and now valve opening should be comparatively large, to supply water in time; When soil water amount is close to time saturated, for economizing on water to greatest extent, avoid running off and evaporation, valve needs to close in time.

2. a kind of Green Home plant maintenance control device based on arm processor according to claim 1, it is characterized in that: described precision drip irrigation system comprises stepper motor driver, stepper motor, frequency converter, immersible pump, valve, drip irrigation emitter, soil humidity sensor, A/D module, described arm processor, stepper motor driver, stepper motor, valve, drip irrigation emitter, soil humidity sensor, A/D module connect successively, A/D model calling is to arm processor, and described arm processor, frequency converter, immersible pump, valve connect successively.

3. a kind of Green Home plant maintenance control device based on arm processor according to claim 1, is characterized in that: described Intelligent supplemental lighting system is made up of detection module and supplementary lighting module; Described detection module is used for subrane and detects light intensity; If the light intensity detected lower than the threshold value of software set, then starts supplementary lighting module; The startup of described supplementary lighting module is controlled by detection module; The light filling signal that supplementary lighting module is used for sending according to arm processor processes, and controls the brightness of LED.

4. a kind of Green Home plant maintenance control device based on arm processor according to claim 3, is characterized in that: described detection module detects reddish blue light intensity by reddish blue silicon photoelectric diode, and reddish blue light intensity is formed by 8:1.