Key technologies of Internet of things applied in cold chain logistics of fruits and vegetables-Company news

The purpose of the cold chain logistics is to ensure the good quality of the fruits and vegetables from the field to the consumers, but in circulation, there is a frequent occurrence of broken links in each link, which leads to the high cost of the cold chain logistics, the difficulty of ensuring the quality of the fruits and vegetables, and the unclear division of the responsibilities and so on. The application of the Internet of things technology in the cold chain logistics of fruits and vegetables can realize the information transparency between the supervision department, the cold chain logistics enterprise of fruit and vegetable, and the three consumers of the consumer, so as to achieve the purpose of inquiring, supervising and tracking the cold chain logistics of fruits and vegetables.

The logistics industry is the earliest contact with the Internet of things, and the intelligent logistics is one of the six strategic applications of the Internet of things in the next 10~15 years. The application of the Internet of things to the logistics field has promoted the rapid development of the logistics system and promoted the development of the logistics industry into a new era of development - the age of intelligent logistics. The development of intelligent logistics brings opportunities and challenges to all fields of logistics, and makes some uncontrollable factors transparent and accountable. The complex and diverse links in the logistics operation are effectively linked up, at the same time, the logistics cost is reduced, the logistics efficiency is improved, and the consumers are relaxed and safe to buy and consume. This article takes fruit and vegetable cold chain logistics as the research object, the core technology of the Internet of things is applied to each link of the cold chain logistics of fruit and vegetable, and constructs the overall framework of the Internet of things in the cold chain logistics of fruits and vegetables.

First、Analysis of the current situation of the cold chain logistics of fruit and vegetable

At present, the planting area and production of fruits and vegetables in our country are the first in the world, and about 4 million tons of fresh agricultural products enter the circulation field every year. Because of the backwardness of the fresh keeping industry, the way of storage and consumption is original. According to the statistics, 80 million tons of fruits and vegetables are rotted and the rot rate of fruits and vegetables ranks first in the world. The main reason for this enormous waste is that the circulation of fruits and vegetables from the field to the consumer's table has not formed a coherent fruit and vegetable food industry chain. From the planting, purchasing, transporting, storing, processing and selling of fruit and vegetable, there is no effective economic interest body. The farmers only grow fruit and vegetable, and the dealers of fruit and vegetable are only in charge of purchase and sale. The third party logistics enterprises are only responsible for transportation and storage. Coordination among these stakeholders is difficult, the division of responsibilities is unclear, and whether consumers can buy good and inexpensive fruits and vegetables depends on luck.

According to statistics, 60% of fruits and vegetables are sold for the season each year. The rest 35% to 40% need refrigeration. Cold chain logistics plays a very important role in the circulation of fruits and vegetables. It is an important factor to ensure the quality of fruits and vegetables and stabilize the market price of fruits and vegetables. But there is a huge gap between the development level of the cold chain logistics in our country and the world advanced logistics level: the cold chain logistics circulation rate is low, the cold chain facilities and equipment are not matched, the cold chain technology and the cold chain system construction of fruit and vegetable are in the initial exploration stage, the cold chain logistics operation and the transaction cost of fruit and vegetable are both high, and with the developed countries. More than 20 percentage points higher than the average, with the improvement of people's living standards, the demand for the quality and freshness of food is becoming more and more high. Cold chain logistics has attracted people's general attention.

Second、Key technologies of Internet of things applied in cold chain logistics of fruits and vegetables

The core technologies of the Internet of things include wireless sensor network technology, radio frequency identification technology, two-dimensional code technology, M2M material and material data communication technology, global positioning system technology, microelectromechanical system technology and two fusion system. The key and core technology is wireless sensor network technology, because it runs through all aspects of the Internet of things and is an integrated application of other levels of technology. In the cold chain logistics of fruits and vegetables to identify and track each link in the circulation of fruits and vegetables, the RFID technology is generally applied to each link of fruit and vegetable circulation, and the seamless link between the various links of the cold chain logistics of fruits and vegetables can be realized, and the quality of the circulation of fruits and vegetables can be controlled and supervised. At present, the application of Internet of things technology in fruits and vegetables cold chain logistics mainly has the following kinds.

1． Electronic product code（EPC）

The product electronic code is the latest generation of product identification code responsible for the Chinese goods coding center, which can be the only global identification of objects in the supply chain, including items, containers, pallets, locations, etc. The EPC is stored on an RFID tag that contains a silicon chip and an antenna that can be connected to some dynamic data when reading the EPC tag. And the use of the Internet to achieve the transmission of information.

2． Radio frequency identification technology（RFID）

Radio frequency identification (RFID) is a relatively advanced non contactless identification technology, which is attached to traceable items, can circulate and read and write around the world. The RFID label stores the information of the standard and interoperability, and collects them to the central information system through the wireless data communication network to realize the fruits and vegetables. Such as the identification of goods, and then through the open computer network to achieve information exchange and sharing, to achieve the "transparent" management of goods. It has the advantages of being renewable at any time, convenient scanning, fast scanning speed, multi-target scanning for visible and invisible, low cost and so on. At present, it is widely used in supermarkets, shopping malls, warehouses, libraries and other places. It is the foundation and key technology of the application of Internet of Things technology in the cold chain logistics of fruits and vegetables.

3． Two-dimensional code technology

Two dimensional code, also known as two-dimensional barcode, is a bar code that stores information in two dimensions, horizontal and vertical. Two dimensional code technology has the characteristics of large storage, good secrecy, good tracking performance, strong damage resistance and low cost. It is mainly used for product quality problem tracing, logistics center, warehousing center, the annual inventory of joint service center and fixed assets, exerting immediate inventory and immediate decision. At the same time, consumers can search the source of the goods by scanning the two-dimensional code on the goods.

4． Global positioning system technology（GPS）

Global Positioning System (GPS) is a new generation of satellite navigation and positioning system with the capability of real-time navigation and positioning in sea, land and air. As a mobile sensing technology, GPS is an important technology for the application of Internet of things to cold chain logistics. The combination of GPS and modern communication technology makes the method for measuring the three-dimensional coordinates of the earth's surface from static to dynamic, from data post-processing to real-time positioning and navigation, greatly expanding its application breadth and depth, and searching and locating the location of the transportation vehicles and articles in the cold chain of fruits and vegetables.

5． Savant network

Savant a distributed network software that is responsible for managing and transmitting distributed electronic network related data. Middleware between the interpreer and the Internet. The interpreter reads information from sensors and electronic tags and sends it to Savant, which has the functions of data smoothing, data checking and data storage. The data is transmitted to Internet after Savant processing.