KR20200055295A - Irrigation automatic control equipment for crops on bare ground based on self-charging and long-range wireless networks - Google Patents

Abstract

The present invention relates to a bare ground crop irrigation automation system formed based on a plug & play wireless communication system and a self-charging system using sunlight. More specifically, the bare ground crop irrigation automation system includes a plug & play wireless communication system using sunlight, malfunction tolerance technology for preventing the malfunction of a valve and a water pumping motor, and plug & play monitoring software technology. Therefore, the bare ground crop irrigation automation system based on a self-charging and long-range wireless network is capable of saving water required for the management of bare ground crops, enabling uniform crop growth and management and reducing the number of workers.

Description

Self-charging and long-distance wireless network-based agricultural crop irrigation automation system {IRRIGATION AUTOMATIC CONTROL EQUIPMENT FOR CROPS ON BARE GROUND BASED ON SELF-CHARGING AND LONG-RANGE WIRELESS NETWORKS}

The present invention relates to an automated system for irrigating agricultural crops constructed on the basis of a self-charging system using solar power and a wireless communication system of a Plug & Play method,

More specifically, as an automated system for irrigating agricultural crops through a self-charging system, a plug and play wireless communication system using sunlight, fault-tolerant technology to prevent malfunction of pumping motors and valves, and plug and play It is a self-charging and long-range wireless network-based field crop irrigation automation system that has the effect of saving water required for management of open-field agricultural products, including equal monitoring software technology, and equally growing and managing crops and reducing labor.

The current state of agriculture in Korea is experiencing difficulties due to the decrease and aging of the rural population, the fall in the grain self-sufficiency rate, the stagnation of farm household income after the FTA, and the deepening of climate change on the Korean Peninsula.

According to the results of the 2014 Agriculture, Forestry and Fisheries Survey, the aging rate of farm households was 39.1% as of December 2014, up 1.8% from the previous year, and imported agricultural products are increasing every year, and the share of agriculture in the entire industry continues to decrease.

ICT-based smart farms are part of efforts to address aging farming households, where the proportion of the elderly aged 65 and over is 42% or more, decreasing farming population and farmland, weakening agricultural competitiveness, and confronting various problems caused by extreme weather. Korean investment and market are expanding.

The smart farm is a remote and automatic control of the growth environment of crops and livestock by grafting information and communication technology into greenhouses, barns, orchards, and applying agricultural ICT convergence technology in the fields of agricultural, horticultural and livestock.

In recent years, the smart farm industry for greenhouses and cattle farms has been researched and developed and several products have been released, but the smart farm related products and research in the field of farming are still in the introduction stage.

The Jeonnam region has the most favorable climatic conditions for cultivating the open land, producing the largest number of agricultural products in the country. In particular, in the case of open-air vegetables and fruit trees that require an automatic watering system, the cultivation area is about 38,840 hectares, which is the largest in the country.

In the case of open-air agricultural products, it is the irrigation control that requires the most work and time in the cultivation process, and the pumps and valves must be operated periodically rotating over time for irrigation in a large field.

In addition, installation of facilities such as irrigation pumps, pipes, valves, and sprinklers for a large area is very expensive, so most farmers currently move pipes, valves, and sprinklers to manually irrigate them.

The present invention has been developed to solve this inconvenience, and to provide an "autonomous crop irrigation automation system supporting a self-charging and long-range wireless network" that automates irrigation control to a wide area of low-cost areas at a low cost.

Republic of Korea Registration Utility 20-0422968 (Registration Date 2006.07.26) Republic of Korea Patent Publication 10-2011-0087543 (published on 2011.08.03)

The present invention includes a plug-and-play (Plug & Play) wireless communication system using sunlight, a fault-tolerant technology to prevent malfunction of a pumping motor and a valve, and a plug-and-play (Plug & Play) monitoring software technology. It is an object of the present invention to provide a self-charging and long-distance wireless network-based field crop irrigation automation system capable of saving water required for management, equally growing and managing crops, and having a reduction effect.

To achieve the above object,

The present invention is a plug and play (Plug & Play) wireless communication unit,

Self-charging unit through solar power generation,

A solenoid valve installed in a water pipe connecting the water pump and the sprinkler to open and close the water pipe to control the amount of water supplied,

Irrigation automation control node consisting of a housing forming the outer shape by mounting the respective device inside;

A gateway for communication connection between the irrigation automation control node and the integrated control unit;

A sensor unit including a temperature and humidity sensor that measures temperature and humidity at the same time, a soil wetness sensor that measures the amount of moisture in the soil, and a pressure sensor that detects the presence or absence of a pump of a water pump and a pump and a pumping motor that operates a pump. ,

Plug & Play wireless communication unit,

An integrated control unit consisting of a control unit that monitors a value measured through the sensor unit through a display and sends a control signal to the irrigation automation control node to control an irrigation time point and a water supply amount, a pumping motor, and a solenoid valve; It provides a self-charging and long-range wireless network-based farmland irrigation automation system characterized by consisting of.

An automatic farm water irrigation system supporting self-charging and a long-range wireless network according to the present invention has the following effects.

first. Plug & Play type wireless communication module, convenient wireless network configuration and security setting software between devices and sensors, and plug-and-play simple device and sensor connection group setting between buttons and By providing wireless communication between nodes of 1km or more, technology that can be used in large-scale fields and wireless communication software that prevents crosstalk or collision with other groups are integrated, so it is possible to automatically and properly supply water to agricultural crops in a timely manner. , It is possible to save water required for the management of agricultural crops, it is possible to grow and manage the agricultural crops evenly, and it has the effect of reducing hands by automating irrigation of agricultural crops.

second. Adding and changing the control node of the field control by solving the problem that it is difficult to install and utilize the existing control control system by using the control node of the plug and play type wireless communication system and the self-charging system integrated into one. It has the advantage of being easy.

third. As self-charging and Lora-based long-distance wireless communication technology are applied to be used for large-scale fields, it provides an irrigation control system based on the existing facility house and an automation system for irrigation of farmland.

fourth. Even if the power supply through the solar panel is interrupted due to cloudy or rain for 3 days in a row, the compacted BMS that can be operated is capable of stable system operation by self-powered technology with applied technology.

fifth. It is possible to operate a stable system by applying a fault-tolerant technology to prevent malfunction of the pump motor using a pressure sensor and to prevent malfunction of the valve due to a long-range wireless communication error.

Sixth. It can be used to control the irrigation of crops cultivated in the open land, which can significantly reduce the labor force of farmers and produce high-quality crops.

Seventh. By grafting to various cultivation environments of open land, facility houses, orchards, and tea gardens, it is possible to increase farm competitiveness and contribute to the revitalization of related industries.

1 is an overall configuration of a self-charging and long-range wireless network-based agricultural crop irrigation automation system according to the present invention.
Figure 2 is a conceptual diagram of a plug and play (Plug & Play) wireless communication system of a self-charging and long-range wireless network-based farmland irrigation automation system according to the present invention.
3 is a conceptual diagram of an irrigation automation control node constituting an autonomous charging and long-range wireless network-based agricultural crop irrigation automation system according to the present invention.
Figure 4 is a view showing the external and internal configuration of the irrigation automation control node according to the present invention.
5 is a view showing the external and internal configuration of the integrated control unit according to the present invention.
Figure 6 is a side cross-sectional view showing the structure of the soil wetness sensor according to the present invention.

Hereinafter, a detailed description of the self-charging and long-range wireless network-based agricultural crop irrigation automation system 1 according to the present invention will be described with reference to the drawings.

As shown in Figure 1, the self-charging and long-range wireless network-based farmland irrigation automation system 1 according to the present invention is a plug & play (Plug & Play) wireless communication unit 101,

Self-charging unit 102 through solar power generation,

A solenoid valve (103) installed in a water pipe connecting the pump and a sprinkler to open and close the water pipe to control the water supply.

Irrigation automation control node 10 consisting of a housing 104 to form an external shape by mounting the respective device inside;

A gateway 20 for communication connection between the irrigation automation control node 10 and the integrated control unit 30;

A sensor unit including a temperature and humidity sensor for simultaneously measuring temperature and humidity, a soil moisture sensor for measuring the amount of moisture in the soil, and a pressure sensor for detecting the presence or absence of the pump of the water pump and the pumping motor for operating the pump ( 301) and,

Plug & Play (Plug & Play) wireless communication unit 302,

Monitoring the measured value through the sensor unit 301 through a display, and sending a control signal to the irrigation automation control node 10 to control the irrigation point and the amount of water supplied, the pumping motor and the solenoid valve It is composed of; an integrated control unit 30 consisting of a control unit 303.

The irrigation automation control node 10, the gateway 20, and the integrated control unit 30 constituting the above-described agricultural crop irrigation automation system 1 are all installed on the mobile land in a mobile manner, and specifically for each sub-technical configuration below Let's take a look.

[Irrigation automation control node (10)]

The irrigation automation control node 10 is composed of a wireless communication unit 101, a self-charging unit 102, a solenoid valve 103 and a housing 104.

{Wireless Communication Department 101}

The wireless communication unit 101 uses a low-power long-range wireless communication LoRa to achieve a wireless communication of at least 1 ㎞ or more, thereby enabling smooth communication with nodes that control the valve.

LoRa (Long Range) is a standard released by the LoRa Alliance in early 2015 and is an asynchronous low-power telecommunication network. This technology has the advantage of low cost, low power, and long distance communication. LoRaWAN R1.o is an open standard. It is a standard based on IEEE 802.15.4g.

LoRa is based on chirp spread spectrum (CSS) modulation and maintains the same low power characteristics as FSK modulation, but significantly extends the communication range.

The communication distance of LoRa is 2 ~ 15km in the downtown area, 30Km in the area where LoS is secured, 1 ~ 2Km in the basement, and 2 ~ 3Km indoors. The bandwidth is 125 kHz, the maximum transmit power is 14 dBm, operates in the frequency ISM band, has a low transmission rate, and is designed with a spread spectrum method so that the reception sensitivity is up to -138 dBm.

The basic network configuration of LoRa is a structure in which a large number of terminals using a protocol are connected to a single gateway, through which data is analyzed and utilized by connecting to a mobile communication network. Using this LoRa communication network, a wireless communication distance of 1 Km or more is provided.

The wireless communication unit 101 is configured to enable long-range wireless communication of 1 Km or more in a large-scale field using a LoRa communication network, and to facilitate node recognition and control through a Plug & Play network.

The response time of the irrigation automation control node 10 by wireless communication of the wireless communication unit 101 is achieved within 2 seconds, and the recognition time of the wireless communication failure can be recognized within 5 seconds from the occurrence of the wireless communication failure and processing can be performed. It is configured to.

The following is a summary of the contents as shown in Table 1 below.

Evaluation items
(Main Performance Spec)
unit
Measures
Evaluation (measurement) method Wireless communication distance Km ≥1
Korea Industrial Technology Institute (KTL) test results
Control node response time msec ≤2 Communication failure time msec ≤5

At this time, the wireless communication distance is the distance between the irrigation automation control node 10 and the gateway 20, and wireless communication is performed at a distance of 1 Km or more using GPS.

The response time of the irrigation automation control node 10 is a time until a command for opening and closing the valve is transmitted from the integrated control unit and a response message to this arrives at the integrated control unit 30.

In addition, the wireless communication failure recognition time is a time taken to recognize when wireless communication is not performed in the irrigation automation control node 10.

And in the present invention, as shown in Figure 2, through the plug-and-play (Plug & Play) wireless communication through a simple group management and multiple groups for multiple irrigation automation control node 10 for large-scale field crop cultivation area You can control the communication mix.

In addition, the connection group range setting and release between the irrigation automation control node 10 can be easily accomplished through the Set button and the Run button of the integrated control unit 30 and the irrigation automation control node 10.

4 and 5,

Set buttons are formed on the irrigation automation control node 10 and the integrated control unit 30, respectively. The connection group of the irrigation automation control node 10 is made through the Set button.

To set the connection group, first press the Set button of the integrated control unit 30, then press the Set button of the irrigation automation control node 10 to be set as the connection group, and the number of the corresponding node set as the connection group is the integrated control unit 30. Appears on the display and is set to the group range.

For example, after pressing the Set button of the integrated control unit 30, pressing the Set button of the irrigation automation control node 10 of the irrigation automation control node 10 designated by several numbers, the monitor of the integrated control unit 30 Registered with number 1 appearing.

After pressing the Set button of the integrated control unit 30 again, pressing the Set button of the irrigation automation control node 10 of the irrigation automation control node 10 designated by several numbers 10 times on the monitor of the integrated control unit 30 It appears and is registered.

In this state, the irrigation automation control node 10 of Nos. 1 and 10 is set as one connection group. In this way, the desired irrigation automation control node 10 can be set as a group.

And to release the connection group, press the Set button of the integrated control unit 30 and then press the Run button, and all the set connection groups are released.

Through this method, a user or an administrator can easily set and release a connection group range between irrigation automation control nodes 10, and more easily manage farmland agricultural products through an irrigation automation system including such a configuration. Can be.

{Self-Charging Unit (102)}

The self-charging unit 102 is a solar panel (102a) for converting sunlight into electrical energy,

And the battery unit 102b to charge the electrical energy produced from the solar panel (102a) under the control of the battery management unit (BMS),

It is composed of a battery management unit (BMS) 102c that manages the state of the battery unit 102b.

By the self-charging unit 102, the irrigation automation control node 10 can be driven by using its own power even if there is no external power supply, and also supply power through a solar panel due to cloudy or rain for 3 days in a row. The battery capacity is set so that it can be driven even if it is stopped.

The 'BMS' of the battery management unit (BMS) 102c is an abbreviation of the battery management system, and lithium ion-based batteries such as lithium cobalt, lithium manganese, lithium nickel manganese cobalt, and lithium iron phosphate are overcharged, external shocked, overheated, overdischarged. This is a system to protect the battery by controlling the risk of explosion.

The battery management unit (BMS) 102c is difficult to properly function in the event of failure and corrosion due to moisture, and furthermore, there is a risk of being exposed to moisture in the irrigation supply environment in the field. In the present invention, the battery management unit (BMS) ) 102c is enclosed in a moisture absorbing housing 102c-1.

The moisture absorption housing (102c-1) is polyamide resin 80.0 ~ 90.0 wt%, glass fiber 5.0 ~ 15.0 wt%, red mud inorganic filler 1.0 ~ 13.0 wt%, carbon black (Carbon black) 0.5 ~ 5.5 wt %, Talc (Talc) is composed of a mixture containing 0.5 ~ 5.5 wt%, surfactant 0.1 ~ 5.0 wt%, and serves to block the penetration of moisture into the battery management unit (BMS) (102c).

When the amount of the polyamide resin used is less than 80.0 wt%, the hygroscopicity of the housing 102c-1 for moisture absorption is poor, it is difficult to mold properly, and when it exceeds 90.0 wt%, durability may be deteriorated. The amount of the amide resin used is preferably limited to within the range of 80.0 to 90.0 wt% with respect to the mixture.

The glass fiber is a circular type (Circular type) having a cross-sectional diameter of 7 ~ 13 ㎛ is used. When the amount of the glass fiber used is less than 5.0 wt%, it is difficult to expect durability improvement of the moisture absorbing housing 102c-1, and when it exceeds 15.0 wt%, there is a problem that molding is difficult to be properly performed due to an increase in viscosity. Therefore, the amount of the glass fiber is preferably limited to within the range of 5.0 to 15.0 wt% with respect to the mixture.

The surfactant is selected from glyceryl distearate, polyoxyethylene sorbitan monostearate or diacetyl monoglyceride.

Specific blending examples of the mixture constituting the moisture absorption housing 102c-1 are shown in Table 2 below.

ingredient Formulation Example 1 Formulation Example 2 Formulation Example 3 Formulation Example 4 Formulation Example 5 Polyamide
Suzy 80.0 wt% 83.0 wt% 84.0 wt% 85.0 wt% 86.0 wt% glass fiber 14.0 wt% 10.0 wt% 9.0 wt% 6.0 wt% 5.0 wt% Red mud 3.0 wt% 3.0 wt% 2.5 wt% 2.0 wt% 3.0 wt% Carbon black 2.0 wt% 1.5 wt% 2.0 wt% 2.5 wt% 2.0 wt% Talc 0.5 wt% 1.0 wt% 1.0 wt% 1.0 wt% 1.0 wt% Surfactants 0.5 wt% 1.5 wt% 1.5 wt% 3.5 wt% 3.0 wt% Sum 100.0 wt% 100.0 wt% 100.0 wt% 100.0 wt% 100.0 wt%

{Solenoid valve (103)}

The solenoid valve 103 is for irrigation control, and is installed in a water pipe that connects between the water pump and the sprinkler, and serves to control the amount of water supplied through opening and closing of the water pipe.

The solenoid valve 103 is connected to the solenoid relay, and by maintaining the solenoid relay on (on) or off (off) state through the control signal of the integrated control unit 30, through the solenoid valve 103 It will be controlled automatically.

In addition, it is possible to automatically control the water pump and the solenoid valve according to a water supply schedule table set by the administrator by date or time, and if necessary, it is configured to manually control the water dispenser and the solenoid valve.

{Housing 104}

The housing 104 is mounted inside the wireless communication unit 101, the self-charging unit 102, and the solenoid valve 103 to form the external shape of the irrigation automation control node 10.

Since the irrigation automation control node 10 can be lifted and moved if necessary, it is suitable for the characteristics of cultivation of a field that does not continuously grow crops. In addition, it can be replaced or added in the form of a plug to increase user convenience.

The housing 104 has characteristics of light weight, corrosion resistance, and high durability in consideration of the characteristics of the irrigation automation control node 10, which is used in the field, must be easily moved, and is not easily damaged by external impact.

More specifically,

It was composed of a mixture of low density polyethylene (LDPE) 15.0 to 35.0 wt%, high density polyethylene (HDPE) 15.0 to 35.0 wt%, polypropylene (PP) 15.0 to 35.0 wt%, and polystyrene (PS) 15.0 to 35.0 wt%. 100.0 wt% of waste plastic 45.0 ~ 60.0 wt%,

Tensile strength 35.7 MPa, modulus of elasticity 2.0 × 10 ³ to 2.4 × 10 ³ MPa, elongation 1.3 to 1.8%, carbon fiber 8.0 to 20.0 wt% with a density of 1.7 to 1.8 g / cm 3,

Compatibilizing agent composed of Styrene ethylene butylene block copolymer (SEBS), SB (Styrene butadiene styrene block copolymer, SBS), Ethylene proplyene rubber (EPR) 4.0 ~ 10.0 wt%,

1.0 ~ 15.0 wt% of red mud filler,

Carbon black (0.5 to 5.5 wt%),

Talc 0.5 ~ 5.5 wt%,

Calcium carbonate (Calcium carbonate) consisting of a mixture of 0.5 to 5.5 wt%.

Specific blending examples of the mixture constituting the housing 104 are shown in Table 3 below.

ingredient Formulation Example 1 Formulation Example 2 Formulation Example 3 Formulation Example 4 Formulation Example 5 Waste plastic 51.5 wt% 53.0 wt% 53.5 wt% 56.0 wt% 56.5 wt% Carbon fiber 18.0 wt% 17.0 wt% 16.0 wt% 16.0 wt% 17.0 wt% Compatibilizer 7.0 wt% 8.0 wt% 8.0 wt% 9.0 wt% 9.0 wt% Red mud 13.0 wt% 12.0 wt% 13.0 wt% 10.0 wt% 9.0 wt% Carbon black 4.5 wt% 4.0 wt% 3.5 wt% 3.0 wt% 2.5 wt% Talc 2.5 wt% 2.5 wt% 2.5 wt% 2.5 wt% 2.5 wt% calcium
Carbonate 3.5 wt%  3.5 wt% 3.5 wt% 3.5 wt% 3.5 wt% Sum 100.0 wt% 100.0 wt% 100.0 wt% 100.0 wt% 100.0 wt%

In Table 3, the waste plastic is composed of 25.0 wt% of low density polyethylene (LDPE), 25.0 wt% of high density polyethylene (HDPE), 25.0 wt% of polypropylene (PP), and 25.0 wt% of polystyrene (PS). Use that.

And as a compatibilizer, SB (Styrene ethylene butylene block copolymer, SEBS) is used alone.

To summarize the proposed irrigation automation control node 10, the plug-and-play (Plug & Play) wireless communication system and the self-charging system form an integrated combination, and specific specifications are shown in Table 4 below.

division Item Specification Processor MCU ATMega series
Wireless communication
Wireless standard LoRa Frequency band 868/433 MHz Communication distance 1 ㎞ or more
sensor
Temperature and humidity sensor One Soil humidity sensor One Pressure sensor One Self-charging
Solar panel 3W battery 2,000mA or more Irrigation control Solenoid valve 5V operation

[Gateway 20]

The gateway 20 is a communication connection between the irrigation automation control node 10 and the integrated control unit 30, and is made through a long-range wireless communication system that supports a simple connection in a Plug & Play method.

After the mutual recognition between the irrigation automation node and the gateway through a method of pressing a button, a wireless network configuration of a plug-and-play method that is automatically registered as a group is formed, so that the irrigation automation control node 10 is easily replaced or added.

In addition, it uses wireless communication protocols and software with crosstalk or collision avoidance that may occur during wireless communication with other groups or nodes.

[Integrated control unit 30]

{Sensor unit 301}

The sensor unit 301 is a temperature and humidity sensor (301a) for simultaneously measuring temperature and humidity, a soil wetness sensor (301b) for measuring the amount of moisture in the soil, and the operation of the water pump pump, detects the pressure and operates the pump And a pressure sensor 301c for detecting a pumping motor.

The temperature and humidity sensor 301a is a sensor capable of acquiring temperature and humidity at a time, and uses DHT22 as a specific example.

The characteristics of the DHT22 are as follows.

-Supply voltage: 3.3 ~ 6 V DC

-Output signal: digital signal via single-bus

-Operating range: Humidity 0 ~ 100% RH (Relative Humidity), Temperature 40 ~ 80 ℃

-Accuracy: Humidity ± 2% RH (Relative Humidity), temperature <± 0.5 ℃

-Signal period: average 2S (seconds)

The soil wetness sensor 301b is for measuring moisture in the soil, and must contact the soil. Because it is buried in the measurement, the shape of the sensor should be able to detect as much as possible the electrical change according to the moisture content of the soil without interfering with the movement of moisture in the soil.

The moisture level of the soil is one of the most important indicators of soil condition, and the methods of measuring the moisture level of the currently developed soil include dry weight, TDR (Time Domain Reflectometry) and FDR (Frequency Domain Reflectometry), moisture tension method, EC ( Electrial Conductivity).

The soil moisture sensors of the TDR (Time Domain Reflectometry) and the FDR (Frequency Domain Reflectometry) method both receive high-frequency and return reflected waves in the soil, and the TDR method uses the time difference between the reflected waves, and the FDR method returns. It uses the change in electric capacity according to the intensity of the reflected wave. TDR and FDR are more expensive than other sensor methods, so TDR and FDR sensors are expensive because they measure the moisture content of the soil using high frequency. Therefore, it is difficult to be used for small and medium sized greenhouses or land cultivation farming centered on land, which is the majority of farms in Korea.

Therefore, in the present invention, a soil wetness sensor capable of measuring a relatively accurate moisture level at a low price is used.

The soil wetness sensor (301b), as shown in Figure 6,

A substrate 301b-1,

A lower electrode 301b-2 formed by depositing aluminum to a thickness of 0.3 to 0.8 μm on the substrate 301b-1;

A polyamic acid is coated on the lower electrode to a thickness of 1.5 to 2.4 μm for 20 to 40 seconds at 2,500 to 8,000 rpm using a spin coater to form a coating film, followed by a photolithography process. To form a plurality of holes having a diameter of 300 ~ 700 ㎛ in the coating film through, the first bake (bake) for 60 ~ 100 seconds at 79 ~ 82 ℃, second bake for 60 ~ 100 seconds at 95 ~ 100 ℃ (Bake) to cure, and cured at 280 ~ 300 ℃ for 30 ~ 50 minutes (curing) to adjust the thickness to 0.6 ~ 0.8 ㎛ to form a polyimide (Polyimide) moisture-sensitive layer (301b-3),

It consists of an upper electrode (301b-4) formed by depositing aluminum to a thickness of 0.3 ~ 0.8 ㎛ on the upper portion of the moisture-sensitive layer (301b-3),

The polyimide is a solvent of n-methyl-2-pyrrolidone and 4,4'-oxydianiline (4,4'-oxydianiline) diamine in the reactor. ), And stirred at 60 ~ 80 rpm for 40 ~ 50 minutes,

Synthesis by adding anhydrous BPDA (3,3'-4,4'-biphenyltetracarboxylic dianhydride) and BTDA (3,3'-4,4'-benzophenone tetracarboxylic dianhydride) to the reactor at the same weight ratio for 2 to 3 hours. Use one.

The soil wetness sensor 301b manufactured as described above has excellent electrical performance and is easy to process and manufacture at low cost.

The pressure sensor 301c is installed to check whether or not the solenoid valve is operated, and thereby prevents malfunction of the pumping motor.

That is, when a pressure above a certain value is detected through the pressure sensor 301c during irrigation control, the pumping motor is automatically damaged by controlling the pumping motor according to the control signal of the integrated control unit 30 and simultaneously sending an alarm to the manager. It should be prevented.

The integrated control unit 30 monitors the value measured through the sensor unit 301 through a display, and sends a control signal to the irrigation automation control node 10 to provide irrigation time, water supply amount, and pumping motor. And a solenoid valve.

Self-charging and long-distance wireless network-based farmland irrigation automation system according to the present invention supports plug-and-play wireless communication, making it easy to add and change irrigation automation control nodes to install and utilize existing control control systems As it can solve the difficult problems of the farm, it can be operated appropriately for the characteristics of cultivation of land that does not continuously cultivate crops, and supports self-charging and long-range wireless communication so that it can be used for large-scale fields. It can be differentiated from irrigation control system.

Also, it can be used as irrigation control of crops cultivated in the open land to greatly reduce the labor force of farmers and to produce high-quality crops, and it can increase the competitiveness of farms by grafting it into various cultivation environments in the field, facility houses, orchards, and multiple fields. The award is highly available.

10: Irrigation automation control node
20: gateway
30: integrated control unit
101: wireless communication unit
102: self-charging unit
103: solenoid valve
104: housing
301: sensor unit
302: wireless communication unit
303: control unit

Claims (7)

Plug & Play (Plug & Play) transmission and reception wireless communication unit 101,
Self-charging unit 102 through solar power generation,
A solenoid valve (103) installed in a water pipe connecting the pump and a sprinkler to open and close the water pipe to control the water supply.
Irrigation automation control node 10 consisting of a housing 104 to form an external shape by mounting the respective device inside;
A gateway 20 for communication connection between the irrigation automation control node 10 and the integrated control unit 30;
A temperature and humidity sensor (301a) that measures temperature and humidity at the same time, a soil wetness sensor (301b) that measures the amount of moisture in the soil, and a pressure sensor that senses the presence or absence of a pump water pump, and a pumping motor that senses pressure and operates the pump. A sensor unit 301 including (301c),
Plug & Play (Plug & Play) wireless communication unit 302,
Monitoring the measured value through the sensor unit 301 through a display, and sending a control signal to the irrigation automation control node 10 to control the irrigation point and the amount of water supplied, the pumping motor and the solenoid valve Integrated control unit 30 consisting of a control unit 303; self-charging and long-range wireless network-based farmland irrigation automation system characterized by consisting of.
The method according to claim 1,
The self-charging unit 102 includes a solar panel 102a that converts sunlight into electrical energy,
And the battery unit 102b to charge the electrical energy produced from the solar panel (102a) under the control of the battery management unit (BMS),
It consists of a battery management unit (BMS) (102c) for managing the state of the battery unit (102b),
The battery management unit (BMS) 102c is sealed inside the moisture absorbing housing 102c-1 including polyamide and glass fiber, and has a function of preventing damage or corrosion of BMS due to moisture.
The moisture absorption housing (102c-1) is polyamide resin 80.0 ~ 90.0 wt%, glass fiber 5.0 ~ 15.0 wt%, red mud inorganic filler 1.0 ~ 13.0 wt%, carbon black (Carbon black) 0.5 ~ 5.5 wt %, Talc (Talc) 0.5 ~ 5.5 wt%, and 0.1 ~ 5.0 wt% of the surfactant, self-charging and long-range wireless network-based field crop irrigation automation system, characterized in that consisting of.
The method according to claim 1,
Housing 104 is low density polyethylene (LDPE) 15.0 ~ 35.0 wt%, high density polyethylene (HDPE) 15.0 ~ 35.0 wt%, polypropylene (PP) 15.0 ~ 35.0 wt%, polystyrene (PS) 15.0 ~ 35.0 wt% 100.0 wt% of the waste plastic composed of a mixture of 45.0 ~ 60.0 wt%,
Tensile strength 35.7 MPa, modulus of elasticity 2.0 × 10 ³ to 2.4 × 10 ³ MPa, elongation 1.3 to 1.8%, carbon fiber 8.0 to 20.0 wt% with a density of 1.7 to 1.8 g / cm 3,
Compatibilizers composed of a mixture of Styrene ethylene butylene block copolymer (SEBS), Styrene butadiene styrene block copolymer (SBS), Ethylene proplyene rubber (EPR), 4.0 to 10.0 wt%,
1.0 ~ 15.0 wt% of red mud filler,
Carbon black (0.5 to 5.5 wt%),
Talc 0.5 ~ 5.5 wt%,
Self-charging and long-distance wireless network-based field crop irrigation, characterized by ease of movement and excellent stability, made of lightweight, corrosion-resistant and high-durability material of a mixture composed of 0.5 to 5.5 wt% of calcium carbonate Automation system.
The method according to claim 1,
Irrigation automation control node 10 is a self-charging and long-range wireless network-based field crop irrigation automation system characterized in that it is configured to be replaced or added in the form of a plug.
The method according to claim 1,
To set the connection group range between the irrigation automation control nodes 10, press the Set button of the integrated control unit 30, and then press the Set button of the irrigation automation control node 10 to be set as a group. The node number of appears on the display of the integrated control unit 30 and is set to the group range,
Self-charging and long-range wireless network-based field crop irrigation automation system, characterized in that the group range release is configured to release all the groups that have been set by pressing the Run button after pressing the Set button of the integrated control unit 30.
The method according to claim 1,
The integrated control unit 30 automatically maintains the electromagnetic relay connected to the solenoid valve 103 in an on or off state according to a water supply schedule table for each date or time set by the administrator, and automatically irrigates water. Self-charging and long-distance wireless network-based farmland irrigation automation system characterized by being controlled by.
The method according to claim 1,
Soil wetness sensor (301b)
A substrate 301b-1,
A lower electrode 301b-2 formed by depositing aluminum with a thickness of 0.3 to 0.8 μm on the substrate 301b-1;
A polyamic acid is coated on the lower electrode with a thickness of 1.5 to 2.4 μm for 20 to 40 seconds at 2,500 to 8,000 rpm using a spin coater to form a coating film, followed by a photolithography process. To form a plurality of holes having a diameter of 300 ~ 700 ㎛ in the coating film through, the primary bake (bake) for 60 ~ 100 seconds at 79 ~ 82 ℃, secondary bake for 60 ~ 100 seconds at 95 ~ 100 ℃ (Bake) to cure, and cured at 280 ~ 300 ℃ for 30 ~ 50 minutes (curing) to adjust the thickness to 0.6 ~ 0.8 ㎛ to form a polyimide (Polyimide) moisture-sensitive layer (301b-3),
It consists of an upper electrode (301b-4) formed by depositing aluminum to a thickness of 0.3 ~ 0.8 ㎛ on the upper portion of the moisture-sensitive layer (301b-3),
The polyimide is a diamine of 4,4'-oxydianiline and a solvent of N-methyl-2-pyrrolidone and 4,4'-oxydianiline in the reactor. ), And stirred at 60 ~ 80 rpm for 40 ~ 50 minutes,
The reactor was synthesized by adding anhydrous BPDA (3,3'-4,4'-biphenyltetracarboxylic dianhydride) and BTDA (3,3'-4,4'-benzophenone tetracarboxylic dianhydride) at the same weight ratio for 2 to 3 hours. Self-charging and long-distance wireless network-based automated farming water irrigation system, which is characterized by being one.

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