Introduction
English, Revision 03, Date: 11.05.2017
5
1.2
Functional Principle
The guidance antenna consists of three systems with one cross-coil antenna each.
Each of these systems generates one “Detect” signal and two output values for the
measured sum and difference signal that are proportional to the horizontal or vertical
components of the magnetic field. In addition to this in
a working area of max. ±30 /
±40 / ±50 mm at nominal reading height
the two values for sum and difference volt-
age are used to calculate and output the actual offset (in millimeters) from the nominal
track.
Figure 1
Schematic diagram
Example
Figure 2
Diagram: Voltage curve of the three antenna systems (example)
By using three antenna systems, branching from the main course is made possible.
The three antenna systems work synchronously and their measured values are perma-
nently cyclically transmitted via CAN-Bus and via the serial interface. The decision
which of the signals is to be evaluated at a particular time is carried out by the vehicle
controller.
80 mm
Power
CAN
R
R
L
R
L
L
H
L
SYSTEM 3
SYSTEM 2
SYSTEM 1
NODE-ID
HG 19334-A
INDUCTIVE GUIDANCE SENSOR
GÖTTING KG
Celler Str. 5, D-31275 Lehrte
80 / 100 / 140 mm
35 mm
Energy loop
Depending on the
Working area
±30 / ±40 / ±50 mm
variant:
Center deviation [mm]
Sum
Difference
System 1
System 2
System 3
Center
Right
In direction of travel: Left
Sum
255
0
0
127
-128
Diff
e
rence
