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At present， with the rapid growth of the world's population and the shortage of freshwater resources increasingly becomes a serious issue. How to achieve fair use of international river water resources？ It has become a problem to be considered and solved by the whole world. Farmland irrigation can’t exist without freshwater which comes from river nearby. Low irrigation efficiency has been the most urgent need for improvement in recent years.We have designed a new type of machine. In this paper， the structure， shape and geometric size of intelligent irrigation machine are designed， and the control circuit is verified.The physical objects are made by 3D printing and assembled and debugged with electronic control components.
Key;Words：agricultural;freshwater;;irrigation;efficiency;;intelligent;irrigation;machine
1.1.introduction
Agriculture consumes the largest part of water， which takes up 2/3 of the overall usage of the fresh water across the world.
The unreasonable use of irrigation water will not only waste water， but also may lead to international disputes. Improving irrigation efficiency is an important way to deal with water crisis. Intelligent irrigation machine provides a new design of modern smart agriculture products， which can effectively solve the problems.
1.2.Significance
Currently， almost all feasible solutions in this area require considerable human and financial resources. Maintenance costs are also unacceptably，high for small countries with small arable land. We have designed a new type of Intelligent irrigation machine which can easily take care of a farmland.The introduction of 3D printing technology makes our equipment inexpensive and can be modified according to the actual circumstances.Importantly，the system is cheap and easy to operate.
If our machine is successfully implemented，agricultural water can be greatly saved.The water saved can replace the water originally supplied to industry and household.At the same time， it can also maintain the health of the river itself.
2.1.Overview on machine
We have designed a kind of intelligent irrigation device. The device is composed of three parts：basin body，electronic monitoring unit and watering unit.The electronic monitoring unit consists of humidity sensor，parameter input module and parameter control module.The watering unit comprises a pump and a nozzle connected to the pump.The pump，the humidity sensor and the parameter input module are respectively connected with the parameter control module.
2.2.Internal devices
1.Main control board （Single-chip）：We use the Arduino 2560 control board.
2.Bluetooth module：We use common HC-05，HC-05 Bluetooth module which is applicable to a variety of 3.3V single-chip computer systems.
3.Soil detection module：This module monitors the humidity around the farmland and the soil humidity.It is the core part of this machine.
4.Circuit design：，According to the functions we designed， the above-mentioned parts are set and welded on the main control board. 3.Operation effect
During a monitoring cycle，the humidity sensor will monitor the humidity of crops，and transmits the humidity data to the main control board in real time，and displays it on the touch screen.The control board will compare the detection value with the preset value.If the detection value is less than the preset value，the main control board will send a signal to the feed valve to make it open， and then send a signal to the pump for pumping water.The sprayer is used to irrigate large area of soil for 3 seconds，then the pump and the water valve will be closed.After half an hour，the detection value will be compared with the preset value.If the detection value is greater than or equal to the present value，no action will be taken and the work cycle will be achieved.The preset value can be set by myself on the touch screen.
The humidity value of different kinds of plants will be shown on the touch screen.And the humidity preset value can also be adjusted in real time.Different plants have different irrigation cycles and different irrigation time.Both of them can
also be adjusted to achieve the most scientific and reasonable cultivation mode.
Ⅳ.Conclusion
With the development of science and technology，there will be more and more products like intelligent irrigation system which can save a lot of natural resources.How to achieve fair use of international river water resources？The system we designed is really a good way to solve this problem.It is believed that similar problems will be solved one by one in the future.It was said that human development upsets the delicate equilibrium of the ecosystem.The earth is the common home of mankind.We should try our best to protect it.The system demonstrates the determination and knowledge reserve of our youth groups to solve environmental problems.
Reference
[1]R.Pfeifer and C.Scheier，Understanding Intelligence. Bradford Books，MIT Press，2001.
Key;Words：agricultural;freshwater;;irrigation;efficiency;;intelligent;irrigation;machine
1.1.introduction
Agriculture consumes the largest part of water， which takes up 2/3 of the overall usage of the fresh water across the world.
The unreasonable use of irrigation water will not only waste water， but also may lead to international disputes. Improving irrigation efficiency is an important way to deal with water crisis. Intelligent irrigation machine provides a new design of modern smart agriculture products， which can effectively solve the problems.
1.2.Significance
Currently， almost all feasible solutions in this area require considerable human and financial resources. Maintenance costs are also unacceptably，high for small countries with small arable land. We have designed a new type of Intelligent irrigation machine which can easily take care of a farmland.The introduction of 3D printing technology makes our equipment inexpensive and can be modified according to the actual circumstances.Importantly，the system is cheap and easy to operate.
If our machine is successfully implemented，agricultural water can be greatly saved.The water saved can replace the water originally supplied to industry and household.At the same time， it can also maintain the health of the river itself.
2.1.Overview on machine
We have designed a kind of intelligent irrigation device. The device is composed of three parts：basin body，electronic monitoring unit and watering unit.The electronic monitoring unit consists of humidity sensor，parameter input module and parameter control module.The watering unit comprises a pump and a nozzle connected to the pump.The pump，the humidity sensor and the parameter input module are respectively connected with the parameter control module.
2.2.Internal devices
1.Main control board （Single-chip）：We use the Arduino 2560 control board.
2.Bluetooth module：We use common HC-05，HC-05 Bluetooth module which is applicable to a variety of 3.3V single-chip computer systems.
3.Soil detection module：This module monitors the humidity around the farmland and the soil humidity.It is the core part of this machine.
4.Circuit design：，According to the functions we designed， the above-mentioned parts are set and welded on the main control board. 3.Operation effect
During a monitoring cycle，the humidity sensor will monitor the humidity of crops，and transmits the humidity data to the main control board in real time，and displays it on the touch screen.The control board will compare the detection value with the preset value.If the detection value is less than the preset value，the main control board will send a signal to the feed valve to make it open， and then send a signal to the pump for pumping water.The sprayer is used to irrigate large area of soil for 3 seconds，then the pump and the water valve will be closed.After half an hour，the detection value will be compared with the preset value.If the detection value is greater than or equal to the present value，no action will be taken and the work cycle will be achieved.The preset value can be set by myself on the touch screen.
The humidity value of different kinds of plants will be shown on the touch screen.And the humidity preset value can also be adjusted in real time.Different plants have different irrigation cycles and different irrigation time.Both of them can
also be adjusted to achieve the most scientific and reasonable cultivation mode.
Ⅳ.Conclusion
With the development of science and technology，there will be more and more products like intelligent irrigation system which can save a lot of natural resources.How to achieve fair use of international river water resources？The system we designed is really a good way to solve this problem.It is believed that similar problems will be solved one by one in the future.It was said that human development upsets the delicate equilibrium of the ecosystem.The earth is the common home of mankind.We should try our best to protect it.The system demonstrates the determination and knowledge reserve of our youth groups to solve environmental problems.
Reference
[1]R.Pfeifer and C.Scheier，Understanding Intelligence. Bradford Books，MIT Press，2001.