Two. System background
Networking is an important part of a new generation of information technology, the English Name: "The Internet of things". Networking technology is through the radio frequency identification (RFID), infrared sensors, GPS, laser scanners, gas sensors and other sensing devices, according to the agreed protocol to anything connected to the Internet, information exchange and communication, to achieve a network of intelligent identification, positioning, tracking, monitoring and management. In short, the Internet of things is the "Internet of objects and things."
China's population accounts for 22% of the world's total population, and the arable land accounts for only 7% of the world's cultivated land. With the rapid development of the economy, the living standard of the people is increasing, and the contradiction between the shortage of resources, the deterioration of the environment and the dramatic increase of the population is becoming more and more prominent. Especially after China's accession to the WTO, the cheap and high-quality agricultural and sideline products from abroad are continuously flowing into China, which poses a great threat to China's agricultural products market. Therefore, how to improve the quality and efficiency of agricultural products and how to manage large scale land under the guidance of information technology is a cutting-edge and urgent task. The actual situation is that extensive management and abuse of chemical fertilizer, its low efficiency and environmental pollution are amazing.
The traditional agricultural production material and technical means backward, mainly rely on manpower and animal power and various hand tools and some simple machines. The main problems in reality are:
1, the level of agricultural science and technology and equipment lag behind.
2, the agricultural production of pollution and waste, according to agriculture, water conservancy department estimates, the annual consumption of agricultural chemical fertilizer and pesticide and water resources of the rapid growth in data alarming, agricultural pollution problems plaguing many rural areas, many farmers affected the safety of drinking water.
3, the agricultural output is few, the varieties of agricultural products are few, and the farmers' income is low. Rely on and use these backward production tools and technology to maintain simple reproduction, low agricultural productivity, agricultural output growth slow, agricultural development is not very good, this innovation which in turn hinders the progress of agricultural technology and production tools. As a result, the development of traditional agriculture has fallen into a vicious circle. In the process of the development of traditional agriculture to modern agriculture is faced with to ensure the total amount of agricultural products, agricultural industry structural adjustment, Gai Shannong product quality and quality and production efficiency is low, a serious shortage of resources and low utilization rate, environmental pollution and other issues can not adapt to the needs of the sustainable development of agriculture. Therefore, the research on intelligent agricultural technology is very necessary and important. This year, application of IOT technology in agriculture more and more widely, the advantages of the Internet of things technology itself, the traditional agriculture also began to enter the era of automation and informatization development.
Three. A brief introduction to the system
The Internet of things intelligent greenhouse system is a set of Internet of things management system developed by HM company. The system combines the most advanced network communication, automatic control, Internet of things and software technology. The system can real-time remote access to the greenhouse inside air temperature and humidity, soil moisture and temperature, carbon dioxide concentration, light intensity and video image, through the analysis of the model, it can automatically control the greenhouse wet curtain fan, spray irrigation, exterior shading, roof windows side windows, light heating control device. At the same time, the user through the system by mobile phone, PDA, computers and other information terminal to regulators push real-time monitoring information and alarm information, realize the greenhouse information and intelligent remote management, make full use of networking technology in the role of infrastructure in agricultural production, ensure the greenhouse environment is most suitable for the growth of crops to achieve the refinement of the management, create conditions for the crops with high yield and high quality, efficient, ecological, safety, to help customers improve efficiency, reduce cost and increase income.

Four. System scheme design
The IOT intelligent greenhouse system is divided into three levels according to its functions: the perception control layer, the transport layer and the application layer. The actual system is divided into information collection control system, data storage service system and intelligent information management system.
The specific information is shown in the following picture.

As shown above, the whole intelligent greenhouse system of the Internet of things is divided into three small systems. The structure diagram of each system is shown in the following diagram.

4.1 information acquisition and control system
4.1.1 system function
Information acquisition and control system is mainly used for acquisition and control of agricultural greenhouse internal environment information, comprehensive information collector through various sensing devices external access, measuring greenhouse inside each parameter of time and data information through wired or wireless way to send data to the controller and gateway equipment. After receiving the measured environmental information, the wireless relay controller starts to call the external device to regulate the environment information inside the greenhouse through internal system analysis until the environment inside the greenhouse is restored to the appropriate range. After receiving the data information, the gateway device packages the data and sends out the data in a corresponding way according to the design requirements.
A schematic diagram of the information acquisition control system, as shown in the following diagram:

The hardware and the performance of 4.1.2 system
1), intelligent digital sensor
In the intelligent greenhouse system of IOT, the monitoring of environmental information parameters mainly includes six items: air temperature, soil pH value, soil temperature and humidity, oxygen concentration, carbon dioxide concentration and light intensity parameters. The main sensor for air temperature sensor, pH sensor, greenhouse temperature sensor, oxygen sensor, the carbon dioxide concentration sensor and light intensity sensor, numerical sensor detects all through the conversion to digital quantity output information.
2), intelligent data transmission equipment
Integrated information collector
The integrated information collector is a comprehensive information collector developed by HM, which receives the digital signal sent by the RS485 hub through the 485 communication interface. The integrated information collector obtains the picture information of the collection shed through the external camera, and realizes the function of the whole collection point monitoring. The comprehensive information collector will send all the received data information to the multi-function gateway equipment through wired or wireless way, and the specific way is chosen by users and the environment of the installation site.
gateway
A variety of communication modules are connected to realize the function of data conversion of the gateway equipment. The gateway device supports two communication modes: wired and wireless.
3), intelligent control equipment
Relay control module is an independent research and development of a multi - function control equipment. The module has four control ports and two numeric signal input ports. The system communicates with the external device through the communication mode of RS485.
4.2 data storage service system
4.2.1 system function
The characteristics of IOT technology application projects is a huge amount of data, data updates faster, which leads to massive information processing sensor data, data storage and exchange of technical problems, only by simple hardware overlay has been unable to solve, the development and application of IOT technology seriously.
Big data information platform, integrated use of existing technologies and the advantages of cloud storage, integration and specialization, according to customer data scale, cluster relational database technology and the comprehensive application of mainstream cluster based No-sql database, ensure high-speed storage and query relational data query and large-scale sensor data. It also supports the lateral expansion of the system later to ensure the storage capacity and speed expansion of the system under non power failure. The system is implemented by open source program. There is no platform compatibility problem. After clustering, the bottleneck of data processing capability is only related to physical limitations of the machine itself.
The actual deployment and operation of the system can satisfy millions of secondary data processing capabilities, and provide single one hundred thousand level data record acquisition capability, which can fully meet all kinds of related big data processing and mining tasks. In addition system provides a universal interface of Api, two times the development of operation support of users, greatly reducing the user later development and maintenance costs.
4.3 intelligent information management system
4.3.1 system function
Automated information management system is mainly responsible for collecting information management and visualization. The whole system can interact with users in three ways, as shown below.

The interaction of the entire information management system with the user is mainly through large screen display, computer terminal monitoring, and mobile phone or handheld devices. The specific way is that users connect their devices to Ethernet through network lines, WIFI, GPRS and so on, and communicate with the remote server. The functions of the intelligent information management system include:
1, the real-time information shows that the system can display each collection point in real time, and the sensor will collect the information parameters inside the greenhouse.
2, alarm function: when the data detected by the collector exceeds the preset value of the monitoring center, the whole information management system has the alarm prompt and records the related alarm log.
3, data and information management platform: Monitoring Center personnel can monitor the environment of each monitoring site at any time, and check historical data and other related information at any time through data information management platform.
4, authority management: in order to ensure the security of the intelligent information management system, the whole system can only be entered by the personnel authorized by the input password. The data transmission of the whole system has been encrypted, which ensures the security of data transmission.
5, system stability: the system framework has entered the system design and test to ensure the stability of the system and improve the production efficiency.
Five. System implementation scheme
When the intelligent greenhouse system of the Internet of things is implemented, it will be divided into three parts.
1. Infrastructure part
Infrastructure includes gateway equipment, network, antenna and data storage platform, including gateway equipment, antenna, routing, switches and other devices through the box is arranged in the more open weather area in order to return data, and data storage platform is installed on the independent IP server, can be automatic control and early warning system for data call. Under normal circumstances, the whole system of Internet of things intelligent greenhouse system only needs to install a set of infrastructure.
2. Acquisition equipment Part
The acquisition equipment includes a comprehensive information collector, a sensor, and a camera. Under normal circumstances, each collection point will be equipped with a collection device. Each point will be equipped with an integrated information collector, and the number of sensors can be acquired through the 485 bus mode. Installed in the weather box, and using the solar power supply module for power supply.
3. Control equipment Part
The control equipment part mainly includes the installation of the relay controller, the electromagnetic valve, the ventilation fan and the sunshade cord and other equipment. Similar to the acquisition device, each greenhouse only needs to install a set of control devices. The installation of the controller is usually placed near the distribution box to facilitate the overall power supply of the system. The relay control equipment is installed in a small electric cabinet to prevent the influence of the external environment on the work of the equipment. The control device includes the solenoid valve, the ventilator and the sunshade cord, which are installed at the corresponding working place. Nine. Enterprise culture
Hung Bogor Network Technology Co. Ltd. (Shenzhen, Dongguan) is a Hong Kong cooperation enterprises, the main products from the Internet of things, smart buildings, smart city, hotel intelligent control, public lighting control, lighting control, intelligent control of the Home Furnishing GA and production and sales of high-tech companies, has a team of more than 50 hardware and software the product development team, independent research, design, development, and have independent intellectual property rights, trademarks and patents and certification.
Enterprise vision: to become a first-class intelligent brand enterprise, leading the development trend of intelligent technology.
Enterprise mission: creating international first-class intelligent products and helping China become an intelligent power. Enterprise values: altruism, benevolence, innovation and win-win.
Enterprise team: the sun warm, honest, faithful and conscientious, of one heart and one mind.
Enterprise concept: quality for life, innovation as the driving force, constantly improve self, wholeheartedly for the customers.
Enterprise service slogan: to develop the best quality products with the most rigorous work attitude, and return the trust of the users with the best quality product performance.