Smart Presence
With Smart Presence we refer to the type of use cases where you want to detect a moving object and then determine intent. For example, detect a human and then determine if it is approaching the device in which the sensor is placed.
Presence detection is always rather power hungry since the sensor have to run continuously in order to guarantee a detection. These tips will focus on devices connected to the power grid, but we will also touch upon battery powered use cases.
Detecting Movement
The presence detection algorithm is looking for movements. Humans are always generating some kind of movement, either slow movements like breathing or faster movements like walking. If the background is completely still a human will be easily detected. If you have movements in the background generating unwanted detections, you may try to filter them out by e.g. adjusting the weight for fast or slow movements.
Detection angle and range
The detection angle is larger close to the sensor. Inside 1m you can expect close to 180 degrees. At the maximum detection range of around 7m you will only have around 30 degrees detection angle. It is possible to change the detection angle by using a reflector or a lens. With a reflector you can get 180 degrees detection angle up to around 3m. With a lens you can narrow down the detection angle and increase the range if that is needed in your application.
Power consumption
If you have a battery powered application, you will need to find a suitable trade-off between power consumption and detection performance/latency.
For more information and details about our reference application and it’s algorithms please go to: Smart presence — Acconeer docs
REFERENCE VIDEO SMART PRESENSE
This video will give you an overview of our reference application capabilities.