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1、Tag It Right! Passive RFID Tag Placement Written By Louis Sirico“O tag, where art thou?” That is the question your RFID reader keeps asking thousands of times per second. Most of the companies that supply RFID-tagged products to the major retailers or the US Department of Defense have realized that
2、simply slapping tags on their products isnt going to be enough to keep their customers happy. When tagged products arrive at the distribution center, some of the tags fail to read, even though the tags are functioning properly. Whats the secret to producing stellar read-rates? Location, location, lo
3、cation.RFID tags are not like bar codes. Just because you see a tag doesnt mean your RFID equipment will see it. Contrarily, if you cant see a tag, it doesnt mean your RFID equipment wont read it. Confused yet?Successful suppliers understand some basic concepts about tag placement and have taken the
4、 time to consider the complex journey of a product from manufacturer to retailer and the different ways a tags readability may be affected. They have chosen their real-estate wisely and placed their tags with care and precision. It is time and money well spent because if your tagged product doesnt r
5、ead, either your customer will catch it and charge you a handling fee, or worse yet, they wont catch it so youll loose the cost of the product, your customers inventory will be wrong, AND youll have to send a replacement. Exception handling is by far the more costly scenario. Either way youre gonna
6、pay. Your customers environment is different than yours.Yes, this is stating the obvious, but up until now, you probably didnt care. Now, you need to care. Retailers have an extremely different design approach to their RFID solutions than their suppliers because they are dealing with thousands of co
7、mpanies shipping a wide range of products. Therefore, they will optimize their equipment configuration for the average product, not your specific product the way you will.While the physical layout of your distribution center and the retailers may be similar, there are several complicating factors th
8、at can negatively impact the readability of your tags. First, its at this point in the supply chain that your product may come in contact with other products either on a conveyor or as part of a mixed pallet. This means that your case could be next to one that includes metal or water - elements that
9、 can affect readability. Second, some retailers distribution centers move cases on high-speed conveyors that operate at 600 feet per minute and the retailers expect tags to be read at that rate. However, few manufacturers have tested their tags on conveyors that run above 300 feet per minute.But wai
10、t, the complications dont end there. The biggest infrastructure challenge is the retail store itself. Stores receive loose cases of products piled into the truck (like in the picture above). Once unloaded from the trailer, products may be placed on push carts, hand carried, and conveyed. The problem
11、 lies in the lack of conformity of movement. Retailers are most interested in what direction products are moving. They want to know as products come in through the dock doors, move from the backroom to the sales floor, leave through exterior doors, and finally when the case is put in the trash. Many
12、 manufacturers have only taken into consideration how cases are moving in one direction - out.In simple terms this means that your choice of tag and tag placement must be suited for the most challenging environment, which is most likely outside your facility and scope of control. Since your retail c
13、ustomer has little control over what RFID tag is used and where it is placed, they are relying on you to tag products correctly.You want to tag it right? Heres the stuff you need to know:What RFID Tag To Use?Most likely, your current bar code label is going to be replaced by a label with an RFID tag
14、 in it, also known as a smart-label - like the one pictured left. The characteristics of the tag in your label are very important.The Standard - The global standard for RFID tags used in the supply chain is EPCglobal Class 1 Gen 2 also known as ISO-c. You can narrow down your shopping list by only c
15、onsidering tags that are certified by EPCglobal. The complete list is published and can be found here. The certified tags come in a variety of shapes, sizes, and prices. At this point, you need to select a few different tags for testing with your products. You may decide to use different tags for it
16、ems, case/cartons, or pallets.In What Geographic Areas Will The Tag Operate? Different regions of the world have different standards regulating the use of radio frequency (RF) emitting products. If you are tagging in the US and shipping to a US destination, then a tag suited for North America is fine. However, if youre tagging in Asia and shipping products to both Europe and the US, then you require a tag suited for internat
