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  • #8 - Presence Detection with IR Sensor

Labs Idea #8: Presence Detection with Thermopile Infrared (IR) Sensor

  • Motivation/Summary
  • Approach/Measurement
  • Implementation

Author: Sensirion Innovations Team
January 2018


Motivation/Summary

Low power infrared (IR) sensors enable presence detection of users in front of smartphone or computer displays.

A visible light camera or other components can be awakened upon detection of the presence of a user or other suitable actions may be taken.


Approach/Measurement

Sensirion's thermal flow sensor technology can be used as thermopile based infrared sensor with on-chip signal conditioning and digital output.

Using the thermopile IR sensor without a lens enables a large field of view for easy person detection (figure 1).

Figure 1: lens less infrared (IR) sensor field of view

The thermopile infrared sensor shows a clear output signal compared to an IR reference (figure 2).

Figure 2: Sensor output of thermopile IR sensor

Implementation

Sensirion does not sell thermopile IR sensors as a product.

However, the digital SMD CMOSens chip of Sensirion's CO2 sensor would be well suited for IR based person detection applications.


Patent Information

No information or recommendation presented on this website do absolve you from the obligation of investigating the possibility of infringement of third parties’ rights and, if necessary, clarifying the position.


Related Products to this Article

Sensirion Environmental Sensing Co2 Preview

CO2 and RH/T Sensor Module

CMOSens® Technology for IR detection enables highly accurate carbon dioxide measurement at a competitive price.


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