Sensitivity evaluation of thermoresistive sensor constant temperature anemometers

Constant temperature anemometers (CTA) have been extensively studied in the literature, normally using NTC or PTC thermoresistive sensors. A comparative analysis of the sensitivity of CTA configurations using PTC and NTC is carried out in this work. A methodology for the design of the CTA that yields maximum sensitivity for this configuration is proposed. Furthermore, simulations using typical sensors are presented for supporting the theoretical analysis. The results show that the system performance using both types of thermoresistive sensors is practically the same.

[1]  A. Oliveira,et al.  An anemometer with PWM excitation , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[2]  Raimundo Carlos Silvério Freire,et al.  Hot-wire anemometer with temperature compensation using only one sensor , 2001, IEEE Trans. Instrum. Meas..

[3]  Raimundo Carlos Silvério Freire,et al.  A feedback I2-controlled constant temperature solar radiation meter , 1998, IEEE Trans. Instrum. Meas..

[4]  K. Watanabe,et al.  A sensor signal processor , 1994, Conference Proceedings. 10th Anniversary. IMTC/94. Advanced Technologies in I & M. 1994 IEEE Instrumentation and Measurement Technolgy Conference (Cat. No.94CH3424-9).

[5]  G. R. Sarma.  Analysis of a constant voltage anemometer circuit , 1993, 1993 IEEE Instrumentation and Measurement Technology Conference.

[6]  T. M. Cain.  Determination of hot-film constant-temperature-anemometer response , 1995, ICIASF '95 Record. International Congress on Instrumentation in Aerospace Simulation Facilities.

[7]  K. Watanabe,et al.  A digital anemometer , 1993 .

[8]  G. R. Sarma,et al.  Performance studies of the constant voltage anemometer in a Mach 2.3 boundary layer , 1999, ICIASF 99. 18th International Congress on Instrumentation in Aerospace Simulation Facilities. Record (Cat. No.99CH37025).

[9]  K. Watanabe,et al.  A thermistor anemometer for low flow rate measurements , 1994, Conference Proceedings. 10th Anniversary. IMTC/94. Advanced Technologies in I & M. 1994 IEEE Instrumentation and Measurement Technolgy Conference (Cat. No.94CH3424-9).