Operation Manual

High Frequency Integrated RFID Reader Operation Manual Guangdong Sygole Intelligent Technology Co.,Ltd
Fig. 3.3 SG-HR-I5 Induction Plan View (as shown in shadow part)
1. Transmission window;
2. Sm main working field;
3. Sn second working field;
4. Sc critical field;
5. Sg limit distance (maximum clear distance between upper surface of the reader and the transponder, at
which thetransmission can still function under normal conditions);
The induction area of the reader is divided into working area, critical area and
non-working area. In practical application, the recommended working area is most stable
for the reader. When a tag is located in the non-working area, the reader cannot have
wireless communication with the tag. The critical area, located between the working area
and the non-working area, has instable operation and can easily cause data error. When the
reader runs in the metallic working environment, the working area will be weakened and
the practical test shall prevail at this moment. The relation among the working areas of the
reader is as shown in Tab. 3.1.
Tab. 3.1 Relation among Working Areas
Working Field
Main
WorkingFieldSm
Second Working Field
Sn
Critical Field Sc
Field Coverage
0~55%Sg
56~85%Sg
85~100%Sg
In practical application, the field communication may be influenced by various
factors. Therefore, in order to ensure the reliability of RFID read-write operation, it is
suggested to design the read-write distance of the RFID application system according to
the recommended working Field .
Note: the division of the induction field is greatly related to the tag, and the purpose of above areas is to
explain the application principle, and the practical measurement is required for specific implementation.
3.1.2 Influence of minor magnetic field
According to the principle of RFID reader, a minor magnetic field exists in the range
from 0 mm to 30% of the critical distance of the reader, and the minor magnetic field has
greatly limited read/write distance, and a magnetic field gap exists between the minor
magnetic field and the main magnetic field. During operation under dynamic mode, if a