How to use active and passive RFID

- May 18, 2018-

The RFID tag is a popular name for radio frequency identification (RFID). It consists of a tag, an interpreter, and a data transmission and processing system.

Generally divided into active RFID and passive RFID, memory chip with an antenna, the chip stores information that can identify the target.

The most mature application of RFID technology lies in the management of warehouses, logistics, and supply chain to identify advantages such as distance, speed, unbreakable, and large-capacity barcodes. This simplifies the complex flow of traditional logistics and improves the efficiency and transparency of goods circulation.

Passive RFID Application Scenario Passive RFID technology storage is mainly used to track or monitor the shipments of pallets, boxes and goods entering and leaving the warehouse. When entering the warehouse, the goods may already have an RFID tag, or they may need to initialize the tag, enter the cargo information, and then past it on the goods.

In the traditional logistics and transportation mode, terminal scan code is required for every transfer station of goods to confirm that the goods have accurately reached the operation center.

If there are different goods in the same car, passive RFID tags are mostly used because the range of passive tags is relatively small. Within 60cm, scanning errors do not occur when scanning one by one.

Specific cases can refer to e-commerce logistics, each piece of goods to the operation center, there will be a dedicated person to scan one by one to identify. The advantage of this method is that the data is accurate and the error is small. The disadvantage is that if the goods are fragmented, the time required to scan one by one is more expensive, and the goods are damaged or lost.

Source RFID Application Scenario Active RFID is placed in the area of the warehouse where goods need to be monitored and tracked. According to the site environment, active readers are deployed to ensure coverage and signal strength, and wireless LANs Wireless access point planning is the same thing.

The active RFID sensing range can be as high as 30 meters. Since this kind of high-frequency output sensing is so strong, why can't it be used for transportation in transit? The reason is that the current tray electronic tags are only used for sensing identification and cannot carry out cargo information. Analytical management, using active RFID sensors, the terminal can not read what the car is in the end, and it is also very prone to sensor errors.

Therefore, in the traditional logistics system, active applications are in storage and passive applications are in transportation.

If active, passive RFID can be compatible...

Both active RFID and passive RFID have their own advantages and disadvantages. They can only be used in specific scenarios, and their functions are greatly limited. Under the concept of strip-board transportation, the procurement, manufacturing, warehousing, distribution, and pallets will all follow the flow of goods. If the tag on the tray can be compatible with both active RFID and passive RFID, it can bring great convenience to transportation and warehousing. The "Smart Logistics Core" of the smart trays of the company can be compatible with both active and passive RFIDs and applied to different scenarios. But how to achieve accurate data identification?

Binding GS1's global unique code To create a standardized logistics system and optimize the supply chain platform, product traceability and collaboration need to be approached from a broad point of view and from a small point of view, starting with the standard tray and the globally uniform coded logo (GS1). For GS1, for pallets, it is equivalent to issuing an “ID card” for each pallet. The GS1 encoding itself does not make sense. However, all the data read by RFID can be linked by GS1 encoding. Each smart pallet of the Moroccan has a globally unique code to ensure the accuracy of the data.

Both active RFID and passive RFID have their own advantages and disadvantages. They can only be used in specific scenarios, and their functions are greatly limited. Under the concept of strip-board transportation, the procurement, manufacturing, warehousing, distribution, and pallets will all follow the flow of goods. If the tag on the tray can be compatible with both active RFID and passive RFID, it can bring great convenience to transportation and warehousing. Tray's "intelligent logistics core" can be compatible with both active and passive RFID and applied to different scenarios. But how to achieve accurate data identification?

Binding GS1's global unique code To create a standardized logistics system and optimize the supply chain platform, product traceability and collaboration need to be approached from a broad point of view and from a small point of view, starting with the standard tray and the globally uniform coded logo (GS1). For GS1, for pallets, it is equivalent to issuing an “ID card” for each pallet. The GS1 encoding itself does not make sense. However, all the data read by RFID can be linked by GS1 encoding. Each smart pallet of the Moroccan has a globally unique code to ensure the accuracy of the data.

The use of active tags for transport in transit Each pallet has its own GS1 code, and it does not require unloading scans when transported to transfer stations. Through active RFID high-frequency sensing, the vehicle will only enter into the sensing area and the terminal will automatically identify all cargo information on the car. Bind the data with the GS1 code to ensure that the cargo information and transportation status are correct.

This can greatly save the cost of manpower inventory, but also reduce the probability of damage to the goods, lost.

The use of passive tags for intelligent warehousing in warehousing environments is something that every company is doing. However, the intelligent warehousing needs huge human and material resources, so the proportion of domestic smart warehouses is not high.

The transformation of the smart warehouse includes the warehouse management, cargo storage management, and automation management. Why use passive tags in a warehouse environment? The purpose is to precisely manage the goods.

The common logistics warehouses are all three-dimensional warehouses. Generally, the shelves will have 3-4 floors and the area can reach tens of acres. In such a storage environment, how to ensure that the cargo data is accurate and precise to each unit, each It is unrealistic to rely on active RFID alone.

The use of passive tags is to precisely store and manage the goods. Through the modification of the shelves, each shelf can sense the passive RFID on the tray. As long as the corresponding goods are placed in the designated position, RFID on the tray is used. The tag will be activated and the type and information of the goods will be transmitted.

The shelf is generally 1-2m, and the passive RFID sensing range is about 60cm. The two are in perfect agreement. There is no need to worry about misreading the goods information on the side shelves.