The Role of Proximity Sensing in Driving Emerging Markets
Release time:
2024-06-07
Proximity sensors are very common in system design, so the question of "do you need a proximity sensor" is less often encountered, and it is more common which type best meets the design goals. When developing new technologies, the right solution is not always intuitive. It is important to consider the specifications, especially the terminal device characteristics, to determine which sensing technology is used in the system design.
In emerging markets such as audio beamforming and surgical robotics, proximity sensors enable autonomy and automation, safe operation, and high energy efficiency.
Proximity sensors are very common in system design, so the question of "do you need a proximity sensor" is less often encountered, and it is more common which type best meets the design goals. When developing new technologies, the right solution is not always intuitive. It is important to consider the specifications, especially the terminal device characteristics, to determine which sensing technology is used in the system design.
Autonomy and automation
People counting, fall detection and obstacle avoidance are the main use cases for proximity sensors. People statistics subvert retail analysis, measuring store traffic without cameras and alleviating customer privacy concerns. The robot can detect its environment to avoid falling down the stairs, while the drone navigation system with obstacle avoidance can shuttle around trees and avoid power lines and other obstacles within 50 meters.
For applications that require autonomy and automation, the most important factors are distance and field of view, but there is a trade-off between the two. A wider field of view usually means a shorter sensing distance, which is very useful for detecting behaviors such as people approaching a visual doorbell. The reverse is also true; a narrower field of view usually means a longer sensing distance, which is great for applications such as drones that need to slow down in time for a safe landing. The different proximity sensing modes will determine the distance and field of view. Radio frequency (RF) waves (radar) have a detection range of 0.04 meters to more than 100 meters and a field of view of 160 degrees, while near infrared wavelengths (optical time of flight [ToF]) have a detection range of 0.01 meters to 20 meters and a field of view of 0.15 degrees to 120 degrees.
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