chrispeng [ad_1]
1. Background
How to maintain the ecological balance of the water environment is a key technology for high-quality and high-efficiency aquaculture. In the fishing proverb, “to keep a pond of fish, you must first manage a pond of water” is a very appropriate metaphor.
Water quality regulation is a key link to achieve healthy aquaculture. The main purpose is to control water temperature, pH, DO, salinity, turbidity, ammonia nitrogen, COD, BOD and other water quality parameters that have a significant impact on the growth environment of aquatic products, so as to provide the best for aquatic products. Optimal growth environment. At present, general farms lack effective conditions for real-time online monitoring of the basic parameters of aquaculture water quality, so it is difficult to give targeted water quality control.
2. System introduction
Intensive aquaculture water quality online monitoring system is developed for the intensive, high-yield, high-efficiency, ecological, and safe development needs of aquaculture. An aquaculture Internet of Things system integrating online collection of water quality environmental parameters, intelligent networking, wireless transmission, intelligent processing, early warning information release, decision support, remote and automatic control. This system is a major achievement of the National 863 Program “Intensive Aquaculture Digital Integrated System” hosted by the China-Europe Agricultural Information Technology Research Center of China Agricultural University.
Breeding technicians in the monitoring center can grasp the environmental information of aquaculture water quality in real time through the monitoring system, obtain abnormal alarm information and water quality early warning information in time, and can adjust the control equipment in real time according to the water quality monitoring results, and realize the scientific breeding and management of aquaculture. The goal of energy saving and consumption reduction, environmental protection, and increase in production and income. In addition, group users can also real-time grasp the water quality information and employees’ working conditions of the farms distributed in different locations through the Internet.
3. System composition
The system consists of intelligent water quality sensors, wireless sensor networks, oxygenation controllers and monitoring platforms.
(1) Smart water quality sensor
Most water quality sensors are electrochemical sensors, whose output is affected by factors such as temperature, water quality, pressure, and flow rate. Traditional sensors have disadvantages such as complex calibration and calibration, narrow application range, and short service life. Using IEEE1451 smart sensor design ideas, the sensor has the functions of self-identification, self-calibration, self-correction, and automatic compensation; the smart sensor also has the functions of automatic data collection and data preprocessing, two-way communication, standardized digital output and other functions.
According to the water quality requirements of aquaculture, this system can simultaneously monitor five parameters of temperature, dissolved oxygen, pH, conductivity and turbidity. The sensors used are all water quality sensors independently developed by China Agricultural University, which are highly reliable and easy to maintain, and are suitable for popularization and application in the field of aquaculture.
(2) Wireless sensor network
The wireless sensor network can realize 2.4GHz short-distance communication, and the field wireless coverage is 3 kilometers; it adopts intelligent information collection and control technology, and has automatic network routing, self-diagnosis and intelligent energy management functions.
WSN wireless smart collector
(3) Oxygen increase controller
The oxygenation controller is composed of RTU8400 measurement and control terminal and electric control box. It is a key part of realizing oxygenation control. It can drive various oxygenation equipment such as impeller type, waterwheel type or microporous aeration air compressor. The SMC4800 measurement and control terminal can be configured as a wireless data collection node and a wireless control node as required.
(4) Monitoring platform
The user can monitor the water quality parameters through the monitoring platform, while the monitoring computer analyzes and processes the data, makes control decisions, and sends control instructions to the distribution box through the wireless access point.
4. Features and innovation
1) The dissolved oxygen, pH, temperature, conductivity, water level, turbidity and other intelligent water quality sensors used are all invention patents of China Agricultural University. They have self-recognition, self-correction, self-compensation functions and general digital serial ports, and they have good Interchangeability, easy to update and maintain the equipment, and the price is 1/6 to 1/10 of the price of foreign products.
2) The developed wireless sensor network has the characteristics of flexible networking and ultra-low power consumption. The wireless single-hop communication distance is not less than 500m. Through wireless relay and buffer technology, it can cover a breeding farm of 10 square kilometers.
3) The wireless network devices are powered by 3.0V batteries, with low voltage and low power consumption, and are supplemented by solar energy, eliminating wiring, reducing equipment costs, convenient on-site installation, suitable for long-term monitoring in the field, and energy saving .
4) The system integrates intelligent sensing, intelligent processing and intelligent control. The system has a high level of automation, accurate monitoring, timely control and low energy consumption.
5) The system provides mobile phone SMS remote control function, and provides 3G and 4G mobile phone video monitoring interfaces, which can realize remote monitoring in any place where there is a mobile phone signal.
6) The system provides cloud computing services, which is especially suitable for aquaculture water body epidemics, diseases, emergency decision-making services and aquaculture information consultation on a large scale (up to districts, counties, and even provinces).
7) The use of this system has achieved organic integration with facility fishery technology, ecological restoration, and healthy aquaculture technology, and comprehensive monitoring and restoration of water quality can improve the aquaculture environment, enable aquatic products to grow in a suitable environment, and enhance aquatic products’ production. Disease resistance, reducing and avoiding the occurrence of large-scale diseases, thereby effectively improving the yield and quality of aquatic products.
8) The size of the breeds cultivated by this system is enlarged, the total output is increased, and the pollution of the surrounding water environment by aquaculture is reduced, which has significant economic and social benefits and is suitable for large-scale promotion.
5. Typical case
The Intelligent Monitoring System of Yixing River Crab Breeding Environment
Intelligent Monitoring System of Tianjin Factory Aquaculture Environment
Tianjin Facility Aquaculture Online Monitoring System
Dongying Digital Aquaculture System
Ningbo aquaculture environment intelligent monitoring system
Xunshan Group Aquaculture Digital Management System
On-site monitoring system for coral reef bleaching
6. Introduction to the Center
The China-Europe Agricultural Information Technology Research Center of China Agricultural University and the Beijing Engineering Research Center of Advanced Agricultural Sensing Technology is an international scientific and technological cooperation base listed by the Ministry of Science and Technology. It is mainly dedicated to the research and development of agricultural Internet of Things technology and products, with a focus on advanced agriculture Sensing technology, wireless sensor network, communication technology, intelligent processing technology, agricultural system integration technology and Internet of Things-oriented information service technology, formulate agricultural Internet of Things standards, and develop agricultural Internet of Things products and platforms. The research center has 2 professors, 22 associate professors, 15 doctoral students, 35 master students, and more than 40 product development and promotion personnel. They are engaged in intensive aquatic and livestock breeding, facility greenhouses, field planting, special breeding, There is a long-term research foundation in agricultural information technology application fields such as agricultural product storage, agricultural situation monitoring, agricultural pests and weed control, agricultural product quality and safety traceability, and rural informatization strategies.
[ad_2]
