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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 × 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
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