Discussion on the application of the hottest autom

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Discussion on the application of automatic identification technology to military material packaging marks

1. Research background

in 1996, the U.S. military put forward four new operational principles: "precision strike, enemy maneuver, comprehensive protection, and focus on Logistics". An important part of the "focus logistics" of the U.S. military is automatic identification technology, including bar code identification, radio frequency identification, optical card identification and satellite tracking and positioning identification. At the time of the formation, application and development of "focusing on Logistics", timely tracking, research and formation of achievements with our army's characteristics will play a very important role in our army's "strong support"

through study and research, we believe that the two-dimensional bar code and radio frequency automatic identification technology can be applied to the aircraft withdrawal sign from the hangar at the end of the day. Next, we will briefly introduce the characteristics and applications of the two-dimensional bar code and radio frequency automatic identification technology

II. Characteristics and application of two-dimensional bar code automatic recognition technology

through the analysis of bar code system, PDF417 two-dimensional bar code should be the preferred bar code for logistics applications in our army. The main features are as follows

1. Large information capacity. It can store 1000 Chinese character information

2. Wide types of information. In addition to language, it can also represent voice, photos, fingerprints, signatures and other information that can be digitized

3. Good confidentiality and anti-counterfeiting. With multiple encryption methods, the information is encoded in password format to prevent forgery of service code symbols or illegal use of relevant encoded information. This feature is very important in military applications

4. Strong error correction ability. In the case that the sample cut from the products passing the appearance inspection is stained or damaged, it can be read according to common sense without losing any information. The error correction is divided into 8 levels, and the highest level can reproduce the information contained in the bar code symbol with a damaged area of 50%

5. High decoding reliability. The bit error rate is less than one thousandth (0.0000l%). In the management database test conducted by the U.S. Department of defense, 20million bar code symbols were read, and no decoding error occurred

6. It has anti electromagnetic performance, and can fax, photocopy, and bend

7. It does not depend on collaterals and can be used independently

take the two-dimensional business code as the packaging mark of logistics materials, so that the packaging can develop from protective type to functional type, and realize the whole process management of material flow. The U.S. military takes the two-dimensional barcode as the standard of logistics management and cargo transportation, and stipulates that all military supplies suppliers and material transportation between the armed forces use the two-dimensional barcode. In addition to being the packaging mark of logistics materials, two-dimensional bar code is also of great use in personnel identification. Two dimensional bar code can be used for military ID card. Military medical certificate, military driving license and access permit for confidential places, places with high security requirements, etc. Machine reading ability and anti-counterfeiting ability are important symbols of the new generation of certificates. Two dimensional bar codes have been widely used in military documents of the United States, France, Germany and other countries

III. characteristics and application of radio frequency automatic identification technology

according to the U.S. Army Logistics (January February 1999), a report released by the U.S. Department of defense in 1992 pointed out that in the "desert Phoenix storm" operation, the $2.7 billion spare parts could not be used because the mountains of combat materials could not be effectively identified. According to the estimation of the U.S. Army, if there was a method and means that could effectively identify the location of the container and the name of the materials in the container, it could save about $2billion, especially when the experimental load was large. In fact, the specific item search system developed by using RF technology can solve this problem

radio frequency identification (RFID) system is mainly composed of RF card and RF interrogator. Radio frequency card, that is, non-contact IC card, as the name suggests, when working, the radio frequency card does not contact with the radio interrogator, but realizes information exchange through the transmission and reception of electromagnetic waves of a certain frequency. RFID can automatically obtain information and input it directly into the computer without human intervention. Radio frequency automatic identification technology has the following characteristics

1. non contact

non contact, so it can be recognized in the process of movement

contact free, so it is not afraid of dirt and reduces the impact of the use environment on the performance

2. Large storage capacity

RF cards can be divided into active and passive, and can also be divided into read-only and military reading. It can have ram, EPROM and eepr0m inside, and the storage capacity can range from tens of bytes to several megabytes

3. Easy to use

small size, light weight, easy to carry; Contact free, easy to use

4. Strong confidentiality

with unique non replicability, a variety of data encryption methods, safe and reliable

5. Low network requirements

the absolute safety, reliability and large capacity of IC card reduce its requirements for real-time and sensitivity of computer network in application, which is conducive to use in the environment with low network quality

the application of radio frequency automatic identification technology in packaging marks mainly includes specific item search and logistics material tracking and positioning

1. specific item search

the system is composed of RF card and handheld RF interrogator. Radio frequency cards are packed on containers (or large packing cases) as packaging marks. When searching for an item, the interrogator can send an inquiry signal according to the name and code of the item, and the RF card on the container containing the item will send an answer signal to indicate that the container is within the search range; Using the interrogator, activate the buzzer on the RF card, and then follow the sound to find the container; If the sound is outside the auditory range, you can find it according to the distance and direction displayed by the distance finder

2. Logistics material tracking and positioning

install RF interrogators at intersections (hot spots, war zones), railway terminals, and bridges. These mounting points are called "joint points" RF cards, which are installed on containers (or large packing cases) as packaging marks. When the transport vehicle passes these "lost nodes", the RF interrogator reads the transport data on the RF card and sends it to the RF receiving device. After the launch, the synchronization of the transmission cannot be guaranteed, which will affect the experimental results. After the frequency receiving device receives the data, it will transmit it to the special server. By accessing the server (container number, RF card number, document number and other key data), it can track and locate these materials and obtain the relevant information of the shipped materials

IV. conclusion

looking forward to the 21st century, one of the development trends of packaging is from protective packaging to functional packaging. Functional packaging includes intelligent packaging, stealth packaging, anti electromagnetic packaging, etc. automatic identification technology is applied to packaging marks to realize the intellectualization of packaging. (author: Zhuxia, chenjunbin, Xiao Shucheng, Huang Yongqiang, Yao Xiaoling, physics teaching and Research Office, College of Logistics Engineering)

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