System description With the rapid increase of greenhouses, people's performance requirements are gradually increased, especially in order to improve production efficiency, the requirements for the automation of greenhouses are also getting higher and higher, so the formation of a corresponding greenhouse intelligent monitoring system has become a kind of necessary. This solution uses a distributed control structure, based on distributed data collection, centralized operation and management, and a relatively independent design idea. It comprehensively uses computer network communication and fuzzy control technology. According to changes in greenhouse temperature, humidity, carbon dioxide concentration, light intensity and other parameters, according to Pre-set conditions are used for fully automatic control of fans, water pumps, roller shutters, window openers, heating, irrigation, carbon dioxide generators and other equipment, realizing intelligent control of a single greenhouse and network monitoring of multiple greenhouses. The use of this scheme can provide an ideal growth environment for plants, and can play a role in reducing human labor intensity, improving equipment utilization, improving greenhouse climate, reducing plant diseases and insect pests, increasing crop yield, etc.
System architecture This solution builds an intelligent monitoring system. It must first be equipped with various hardware according to the control requirements, and then connect the various components with a network, thus forming the framework of the control system. Then through software programming and networking, to form a system that can achieve certain functional requirements. The reference frame diagram is as follows: The system function "greenhouse intelligent monitoring system" is an important part of this program.
It mainly has the following functions:
1. System configuration, function setting: set the data collection time period, collection interval, control system execution conditions and other parameters;
2. Data storage, display and printing operations: the collected data can be displayed in real time, can be expressed in charts and can perform printing and other operations;
3. Automatic control of irrigation and fertilization system: It is composed of irrigation equipment and automatic fertilizer, and is controlled by controlling the opening of the water flow valve.
4. Automatic control of the heating system: It is composed of plumbing and heating equipment, and the purpose of controlling the temperature in the greenhouse is achieved by controlling the opening of the heating valve for heating and heating.
5. Automatic control of the cooling system: it consists of a wet curtain paper pad, an axial flow fan and a water supply system, and the purpose is achieved by controlling the water flow and the switch of the fan;
6. Automatic control of the ventilation system: it is composed of an automatic roller blind ventilation system and an axial flow ventilation system. The control purpose is achieved by controlling the switches of the roller shutter motor and the axial flow fan;
7. Automatic control of carbon dioxide concentration: control purpose is achieved by controlling the safe combustion of potassium carbonate;
8. Automatic control of internal and external sunshade system: it is composed of transmission part and sunshade screen, and the purpose of control is achieved through the start and stop of the transmission machine;
9. Automatic control of lighting system: it is composed of special lighting tools for agriculture, and the purpose of adjusting the light intensity by controlling the power supply voltage of the lighting lights;
10. Manual / automatic switching: it can be switched between automatic control and manual control to realize real-time control of the equipment.
System advantages:
1. Reduce the labor intensity of the greenhouse and increase the utilization rate of equipment;
2. Improve the greenhouse climate, reduce pests and diseases, and increase crop yields;
3. Powerful expansion function: through the selection of different peripheral equipment, you can control the greenhouse environment and irrigation, fertilization, etc .;
4. Perfect data processing function: Through the greenhouse intelligent measurement and control system, you can continuously record the information of various sensors and the action records of various control equipment;
5. Remote monitoring function: Even if the staff is not on site, the remote monitoring system can also monitor and control the equipment parameters in the greenhouse;
6. Data networking function: It can be connected with configuration software, can link various data into LAN or Internet, and can share data.

By 2019, the market value of the biodegradable plastics industry will grow at an average annual growth rate of 13.01% to $3.477 billion. The European biodegradable plastics market is expected to grow at an average annual growth rate of 12% from 2014 to 2019.
Biodegradable plastics are ushered in a period of rapid development. Although the concept of biodegradable plastics has been heated up, the application has not been able to increase the volume.

Biodegradable plastics are mainly used in packaging, fiber, agriculture, injection molding and other fields. Among them, the packaging industry is the most widely used. In 2013, it accounted for 60% of the total market, and food packaging demand accounted for more than 70% of the Biodegradable Plastic packaging market. The market for injection molding applications is the main driver of demand for biodegradable plastics.