Inxpect SRE 200 Series - 4. Functioning principles; 4.1 Sensor functioning principles; 4.2 Detection fields

Inxpect SRE 200 Series | Instruction manual v1.5 DEC 2023|Inxpect SAF-IM-200S_5m_7_00047_en_v1.5|© 2021-2023 Inxpect SpA
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4. Functioning principles
Contents
This section includes the following topics:
4.1 Sensor functioning principles 37
4.2 Detection fields 37
4.1 Sensor functioning principles
4.1.1 Introduction
The sensor is an FMCW (Frequency Modulated Continuous Wave) radar device based on a proprietary detection
algorithm. It 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 each 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" below).
4.1.2 Factors that influence the sensor field of view and object detection
WARNING! The presence of conductive material on the sensor could affect its field of view and,
thus, object detection. For proper and safe system operation, validate the system under this
condition.
4.1.3 Factors that influence the reflected signal
The signal reflected by the object depends on several characteristics of the same object:
l
Metallic objects have a very high reflection coefficient, while paper and plastic reflect only a small portion
of the signal
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The greater the surface exposed to the radar, the greater the reflected signal
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All other factors being equal, objects positioned directly in front of the radar generate a more significant
signal than objects to the side
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Motion speed
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Inclination
All these factors have been analyzed for a human body during the safety validation of Inxpect SRE 200 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.
4.1.4 Detected and missed objects
The signal analysis algorithm considers only those objects that move within the field of view, ignoring completely
static objects (if the static object detection option is disabled).
Furthermore, a falling objects algorithm allows ignoring undesired alarms generated by small work waste
products that fall in the first part of the sensor's field of view.
4.1.5 Interference with pacemakers or other medical devices
Radiation from Inxpect SRE 200 Series does not interfere with pacemakers or other medical devices.
4.2 Detection fields
4.2.1 Introduction
The field of view of each sensor can be composed of up to four detection fields. Each of the four detection fields
has a dedicated detection signal.