10.2. Detection of surroundings and traffic
This section covers the essentials of how cameras, radars and other sensors work, including their limitations.
Understanding how your car perceives its surroundings can help you use features that rely on this capability.
Your car's ability to understand its surroundings is achieved through many systems and types of sensors. The car's interpreta-
tion of the data it collects helps inform its behaviour, especially for driver support features.
Cameras work similarly to the human eye. What they capture is used for different purposes, which depends on the camera. For example, the upper front-
Cameras
Radars
facing camera helps the car identify things such as traffic signs and road markings, whereas what the rear parking camera captures appears in the centre
display.
Radars use radio waves to collect information about the car's surroundings. They can identify the distance to objects and certain aspects of their movement.
This information is essential for many features in the car.
These sensors use sound waves to detect relatively close objects. They work by sending out ultrasound pulses that can bounce back to the sensors when they
encounter an object.
Parking
sensors
How systems work together
The different detection types complement each other. They are sometimes used on their own and sometimes together.
Important
Even when used together, these detection systems cannot handle all conditions and traffic situations. This is why it's
important for the driver to never rely fully on driver support features. Always be attentive to conditions and situations
where driver support feature performance is affected by the features' limitations.
General detection and identification limitations
Each type of detection has its own set of limitations, but there are a few general things to consider as well.
The car can't always handle unpredictable or strange situations. When the car finds it difficult to correctly identify the
environment or traffic situation, the accuracy of its response is affected.
Damage to the car can affect detection and features that use it. Many faults can be identified by the car, but some may not
be possible to self-identify. This is why it's important to make sure that the car is in good condition and working order.
Contact an authorised Volvo workshop if you suspect there is any fault or if you notice damage to the car.
Limiting factors and conditions can, and frequently do, coincide. They can compound and interact in ways that amount to
an incorrect response from the car.
Obstacle detection limitations
Obstacle detection helps the car identify certain stationary and moving objects. They can be other road users, such as pedestri-
ans or other vehicles, animals, barriers or other objects. If they are in or close to the car's driving path, they could pose a colli-
sion risk. Depending on the circumstances, the car might be able to warn or intervene if the object is accurately identified. For
all types of objects the car can identify, there are many factors that can prevent accurate identification. Examples of limiting
factors, situations and events include:
Closely spaced, overlapping or partially blocked objects and road users.
Objects and road users that blend in with the background.
Objects and road users that move or accelerate particularly fast.
The content of this manual represents the status of the user manual at the time of printing and may not be completely valid in future
instances. For more information, refer to the first page for the complete disclaimer note.
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