Table of Contents
Advertisement
IUH-F190-V1-*
Product Description
4.2.4
Electronic Product Code (EPC)
The electronic product code is a unique identifier in the form of a sequence of numbers. The
number sequence has a set structure and a length of 64 bits, 80 bits, 96 bits, or longer
(depending on the EPC Ident number used). This number sequence is saved to the RFID tag,
offering worldwide unique identification of the tagged object.
The system of Electronic Product Codes (EPC) was defined by GS1/EPCglobal for use in
inventory management. Tags with memory banks for EPC codes must be programmed by the
user. The memory of new tags must not contain any valid EPC codes. The EPC numbers are
managed and assigned by GS1. To obtain EPC numbers, please contact the GS1 branch in
your country (http://www.gs1.com/contact).
The electronic product code is defined by EPCglobal with at present 13 different encryptions.
SGTIN-96 (serialized global trade item number) is given here as an example of a frequently
used encryption. SGTIN-96 has a defined format, and is structured as follows:
1. Header: The header specifies the EPC standard used, and denotes the number se-
quence.
2. Filter value: Denotes the unit of the product, for example, end product, additional pack-
aging, pallet.
3. Partition: Denotes the point at which the following company prefix ends and the object
data begins.
4. Company Prefix: Assigned sequence of numbers that identifies the producer.
5. Object class: Sequence of numbers that describes the object, e.g., item number.
The company prefix and the object class are each of variable length, but together are al-
ways 44 bits long.
6. Serial number: Sequence of numbers that identifies the item, for example, the sequential
serial number of the item.
Length
Value
To work with unique number sequences without having to use sometimes expensive EPC
codes, we recommend using the TID of the tag, which is programmed into the tag chips by the
semiconductor manufacturer.
4.2.5
Influence of various materials on the sensing range
In the UHF range, the nature of the surrounding area and the surface to which the transponder
is secured have a serious influence on the range that the system can attain. The UHF
transponder cannot be mounted on metal without requiring adaptations. Glass has a negative
influence on the sensing range when used as a mounting surface. If a UHF transponder is
mounted on damp material, the sensing range is much poorer than the range of a transponder
mounted on dry material. The mounting surface often affects the read range much more than
the material between the transponder and the read/write head. The graph shows the effect of
different materials on the sensing range.
14
Header Filter value Partition Company Prefix
8 Bit
3 Bit
3 Bit
48
0
5
dez
dez
dez
Object class
20 - 40 Bit
4 - 24 Bit
4050143
124
dez
dez
Serial number
38 Bit
203886
dez
Advertisement
Table of Contents
