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4. Functioning principles
Contents
This section includes the following topics:
4.1 Sensor functioning principles
4.1.1 Introduction
SBV-01 is an FMCW (Frequency Modulated Continuous Wave) radar device based on a proprietary detection
algorithm. SBV-01 is also a multi-target sensor that sends pulses and receives information, analyzing the
reflection of the nearest moving target that it encounters within each detection field.
The sensor can detect the current distance and the angle of the target.
Each sensor has its own fieldset. The fieldset corresponds to the structure of the field of view, which is composed
of detection fields, see "Detection fields" on the next page.
4.1.2 Factors that influence the reflected signal
The signal reflected by the object depends on several characteristics of the same object:
material: metallic objects have a very high reflection coefficient, while paper and plastic reflect only a small
l
portion of the signal.
surface exposed to the sensor: the greater the surface exposed to the radar, the greater the reflected
l
signal.
position with respect to the sensor: all other factors being equal, objects positioned directly in front of the
l
radar generate a greater signal with respect to objects to the side.
motion speed
l
inclination
l
All these factors have been analyzed for a human body during the safety validation of SBV System Series and
cannot lead to a dangerous situation. These factors may occasionally influence the behavior of the system
causing spurious activation of the safety function.
4.1.3 Detected and missed objects
The signal analysis algorithm takes into consideration only those objects that move within the field of view,
ignoring completely static objects.
Furthermore, a falling objects filtering algorithm allows ignoring undesired alarms generated by small work waste
products that fall within the field of view of the sensor.
SBV System Series | Instruction manual v1.2 DEC 2021| SAF-UM-SBVBus-en-v1.2 | © 2021 Inxpect SpA
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