Instruction Manual

Table Of Contents

4. Functioning principles

Contents

This section includes the following topics:

4.1 Sensor functioning principles 27

4.2 Detection fields 28

4.3 Safety working modes and safety functions 32

4.4 Safety working mode: Both (default) 32

4.5 Safety working mode: Always access detection 33

4.6 Safety working mode: Always restart prevention 33

4.7 Restart prevention function: static object detection option 34

4.8 Features of the restart prevention function 34

4.9 Muting 37

4.10 Anti-tampering functions:anti-rotation around axes 38

4.11 Anti-tampering functions:anti-masking 39

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:

l material: metallic objects have a very high reflection coefficient, while paper and plastic reflect only a small

portion of the signal.

l surface exposed to the sensor: the greater the surface exposed to the radar, the greater the reflected

signal.

l position with respect to the sensor: all other factors being equal, objects positioned directly in front of the

radar generate a greater signal with respect to objects to the side.

l motion speed

l inclination

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.