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Speeder X1 and X2 Configuration and API Guide
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The best accuracy is achieved when the sensor measures as far as possible with
reasonable signal level. The distance to the vehicle can be up to 40 to 90 metres, when
the register plate is reflective, and up to 30 metres without reflective register plates. To
achieve proper illumination for LPR-camera it is sometimes necessary to use shorter
distance. Another option is to use delayed trigger, which is described in paragraph 4.1.2.
The speed of both approaching and departing vehicles can be measured. The selection of the direction is
done by Bit 5 of Control Byte 1.
Fig. 3.
Detection of vehicle with Speeder X1 laser radar affixed on gantry above the lane.
Speed measurement starts with detection of the vehicle when trigger is first activated in
the trigger window. Trigger activation is achieved when amount of the distance results
reaches the hits for trig parameter’s value. After detection sensor measures distance to
the target until vehicle has passed and calculates the speed of the target. The accuracy
for the speed measurement is better than ±2 km/h (±2% for over 100 km/h speeds), when
the measurement beam hits the vehicle (which travels on the lane, not on the side of it).
In order to use the mode user must set following parameters:
No.
Type
Name / Description
Unit
Range
Default
1
B
Operation Mode
7
2
B
Control Byte 1
b5
Speed Behind
0
4
B
Baud Rate
1 - 10
4
5,6
W
Pulse Rate
Hz
1 - 2000
2000
8
B
Attenuation
0 - 15
0
9,10
W
Trigger Distance B
cm
600 - 38000
12,13
W
Trigger Distance A
cm
600 - 38000
29,30
W
Speed Pulse Rate (Note 1)
Hz
0 - 8000
4000
32
B
Speed Geometry (Note 2)
dm
53
B
Sensor Orientation
0,1,2
1
Note 1: Speed pulse rate is in use after detection of a vehicle in speed measurement application (or
mode). Speeder X1 is class 1 laser product. Eye-safety standard limits the pulse rate of Speeder X1 to
2000 Hz for pulse trains in short range (Condition 2, target distance less than 2 meters). Laser pulsing
exceeding 2000 Hz is allowed only while measured distance is more than 2 meters. Pulse train limitations
are controlled programmatically to fulfil the Standard EN 60825-1:2007 (IEC 60825-1:2007) Condition 2.
Note 2: The height of the sensor position is utilized to calculate measurement windows for both lasers
according to the geometry of the measurement set-up. The user must set this parameter accordingly to
achieve accurate speed measurement results.
