Omron V680-CA1D, Руководство пользователя, Страница: 104 / 113

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Conditions
Heat-resistive RFID System
User's Manual
Section 6
Appendices
Influence of Metal Behind Tag (Reference)
Take the influence of metal behind Tags into consideration when mounting them.
The communications distance is adversely affected if there is any metal material around the Tag. The
degree of influence depends on the type, size, and shape of the material around the Tag. The following
graphs show the influence of metal objects behind the Tag for reference.
• Influence of Metal
The following diagram shows the rate of reduction in the communications distance when metal is
located behind the Tag. The horizontal axis in the diagram indicates the distance between the Tag and
the metal plate, and the vertical axis indicates the relative communications distance at 100% without a
metal plate, i.e, the rate of reduction in communications distance.
Test Setup
Material: Steel (t = 1.5 mm)
Shape: 295 mm
×
295 mm
Distance between Tag and metal behind Tag (mm)
Reduction in communication distance (%)
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Antenna Metal
Tag
Communications
distance
Distance
between metal
behind Tag
and Tag