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TOF/Start
4. Introduction
The TOF/Start is a compact yet powerful sensor which detects
people and objects approaching an escalator and speeds it up in
time for them to step comfortably and safely aboard.
The TOF technology enables the TOF/Start to operate with all types
of backgrounds without any need to recalibrate. Usually mounted
under the handrails or flush mounted in the balustrade at the
approach area, it offers excellent detection capability over an area
of up to 2 m x 2 m with a beam angle of up to 70°.
There are two versions of the TOF/Start:
•
The TOF/Start Basic offers people/object detection and a
blanking function to blank out fixed objects, such as bollards.
•
The TOF/Start Advanced offers these features plus a cross-
traffic function.
4.1
Application
Figure 1:
TOF/Start detects intending passengers approaching
an escalator.
4.2
Features of the TOF/Start
• Excellent detection capability, independent of
reflectance
• Ignores cross-traffic via intelligent direction
recognition
• Individual setting of the detection area
• Detection area operates with all types of background
• Insensitive to ambient light
4
4.3
Type description
TOF/Start – a – bb – c – d – e – fff; g; h,h*i,i
a
: -
Advanced
B
Basic
bb
: Aperture angle in °
c
: x-axis
N
Potentiometer
d
: y-axis
N
Potentiometer
e
: C
Automatic calibration
fff
: 1PP Output - PNP/NPN (push-pull)
g
: -
Non-blanking
B
Blanking
h,h
: x-axis
Protection field in m
i,i
: y-axis
Protection field in m
Figure 2:
Type description
5. Configuration
5.1
Type of threshold setting
The distance at which the sensor triggers an output is the
threshold. The TOF/Start requires a threshold setting for
the x-axis; note that the y-axis is fixed at 2 m. A factory
setting as well as a mixture of potentiometer and preset
are also possible. For requirements regarding a variable
y-axis, please contact your local CEDES representative.
Note: The sensor uses a ±120 mm (±4.72 in) hysteresis.
The hysteresis is the difference between the switching points
changing the status from 'free field' to 'object detected' and
back from 'object detected' to 'free field' compared to the
nominal limit.
5.1.1 Threshold setting via potentiometer
The threshold distance at which the sensor triggers an
output is set with a potentiometer for the x-axis on both
the Basic and Advanced versions. This is done using the
potentiometer at the back of the sensor. If the sensor points
to a background, the distance of the switching threshold
to the background is recommended to be set at 150 mm.
English
Threshold
settings
Only if Preset
type
© CEDES | V 1.1
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