Installation & Operating Guide

8
3 Object Detection
3.1 Separate Object Detection
Each Backsense
®
BS-9100 sensor is capable of detecting and reporting data for up to 16
objects within the limitations detailed in section 1.2. In the event that there are more than 16
objects within the detection area of a particular sensor, only the closest 16 detections will be
reported, (based on object radius from sensor)
3.2 Detected Object Data
The BS-9100 will transmit data for each detected object in separate CAN messages. The
following detection data will be reported:
Data Definition
Minimum
Value
Maximum
Value
Description
Polar Radius
0.25m
60.25m
Line of sight distance between
object and sensor front face.
Polar Angle
-70⁰ (Left)
+70⁰ (Right)
Angle between object and sensor
front face. Position perpendicular
to the sensor represents 0⁰.
Co-ordinates X
0.25m
+60m
Object distance forward from front
face of sensor.
Co-ordinates Y
-8m (left)
+8m (Right)
Object distance left or right of
sensor position.
Relative Speed
-64KPH
+63.5KPH
Speed difference between sensor
and object. Negative value
indicates object approaching the
sensor. Positive value indicates
object leaving the sensor.
Reflected Signal Level
0dB
127dB
Power of reflected radar signal
from object.
Object ID
0
15
Object identity. 0 represents
closest object to sensor.
Object Appearance
Status
0
1
Logic ‘1’ indicates detection of
new object. Logic ‘0’ indicates
detection of existing object.
Trigger Event
0
4
Similar to CANOpen requirements;
this parameter identifies the
reason for message transmission.
0 = Keep Alive, 1 = object
detection, 2 = future use, 3 =
future use.
Detection Flag
0
1
Logic ‘0’ indicates object
detection. Logic ‘1’ indicates no
object detection.
Further technical details of detection data are available in section 5.7.