A 25mW CMOS sensor for wind and temperature measurement

Jianfeng Wu, Caspar Van Vroonhoven, Youngcheol Chae, Kofi Makinwa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

31 Citations (Scopus)


This work presents a thermal sensor that can simultaneously measure wind velocity and ambient temperature. It consists of a silicon chip that is heated slightly above ambient temperature and is exposed to, and thus, cooled by the wind. Wind speed and direction are determined via two thermal sigma-delta (TΣΔ) modulators, which control and digitize the 2-D heat distribution in the chip. Ambient temperature is determined by measuring the modulator's period of oscillation, which depends on the thermal diffusivity of silicon, and is a well-defined function of ambient temperature. For wind speeds ranging from 1m/s to 25m/s, the sensor's error is less than ±4% (speed), ±2° (direction) and ±1°C (temperature) for temperatures ranging from -40°C to 50°C.

Original languageEnglish
Title of host publicationIEEE Sensors 2011 Conference, SENSORS 2011
Number of pages4
Publication statusPublished - 2011
Event10th IEEE SENSORS Conference 2011, SENSORS 2011 - Limerick, Ireland
Duration: 2011 Oct 282011 Oct 31

Publication series

NameProceedings of IEEE Sensors


Other10th IEEE SENSORS Conference 2011, SENSORS 2011

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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