Device Description HG G-7335xZB | English, Revision 06 | Date: 30.04.2020
10
Chapter 2 – Safety Instructions
The nominal reading distance between antenna and wire depends on the
antenna type and the wire current. In between antenna and guide wire there
may be no metal. Non-conducting and non-shielding dirt on the roadway as
well as water, oil, tar, earth, fog, snow and ice do not influence the positioning.
Even though dirt does not influence the positioning the antenna should be pro
-
tected against dirt and moisture (e.g. spray water from the vehicle‘s wheels) and
cleaned regularly. Otherwise the antenna‘s attrition rate rises.
The antenna has to be fixed to the vehicle so firmly that its position does not
change during normal operation. Otherwise the superordinate system interprets
the position data wrongly and the vehicle might e.g. drive besides the track.
After the mounting interferences should not exceed 500 units. This closely
relates to the quality of the wire signal. This signal has to be significantly higher
than interference signals. The more interference is radiated especially into the
differential antenna
, the less accurate the distance output becomes.
Generally interferences should be avoided by keeping sufficient distances to
interference sources and consistent reading distances to the guide wire.
In the selected frequency area there may be no interference signals from
clocked motors etc. This includes interferences transmitted via the metal body
of the vehicle. Since magnetic fields may be transmitted via chassis parts it is
advisable to perform tests when in doubt.
Cables have to be installed with a minimum distance of 150 mm from the
antenna since those cables can interfere with the antenna reception. How
much they interfere depends on the power and the frequency. Again it‘s import
-
ant that the interferences are not higher than 500 units.
The system is intended to be used indoors. The operating temperature range is
0 to +50° C.
Relative humidity 95 % @ 25° C (without condensation).
2.5 General Safety Instructions
The track guidance system does not include safety equipment. It may only be
used in applications where the manufacturer and/or the facility operator have
ensured that sufficient measures for safeguarding the personal safety and the
safe detection of obstacles have been established.
The manufacturer and/or the facility operator have to ensure the safe detection
of situations like e.g. the vehicle leaving the track or people or obstacles appear
-
ing in front of the vehicle. In these cases moving parts (e.g. vehicles) have to be
stopped immediately to rule out material damage and personal injuries.
When using the track guidance system the operating conditions from section
2.4 on page 9 have to be observed.
Ensure that interferences in the ground or on the vehicle do not induce a higher
signal than 500 units in the antenna. Make sure that the guide wire has a suffi
-
ciently higher signal. Otherwise measuring errors may occur.
2.6 Obligations of the Operator
When using the track guidance system, the operator must ensure that
all persons within the sphere of influence of an automated system (e.g. Auto
-
mated Guided Vehicle (AGV)) are informed about the type of application and the
associated hazards,
