Hot-wire anemometer with temperature compensation using only one sensor

Ferreira, R.P.C.; Freire, Raimundo C. S.; Deep, C.S.; Neto, José Sérgio da Rocha; Oliveira, Amauri Pereira de

doi:10.1109/19.948306

Cited by 39 publications

(17 citation statements)

References 10 publications

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“…For fluid with constant density and viscosity, the value of h is given by the King's modified equation, by [1]:…”

Section: A Thermoresistive Sensorsmentioning

confidence: 99%

“…The sensor operating temperature was chosen to be T s = 76 ºC, which results in R s = 107.74 , from equation (1). With these parameters and the equations modeling the operation of the micro-sensor, it was possible to carry out simulations and to validate the circuit of the modulator.…”

Section: A Micro-sensormentioning

confidence: 99%

“…Choosing an operating temperature for the sensor and knowing the equation parameters relating the resistance to the temperature, one can determine the value of R s from (1).…”

Section:  mentioning

confidence: 99%

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CMOS sigma-delta thermal modulator

Almeida

Freire

Catunda

et al. 2010

2010 IEEE Instrumentation &Amp; Measurement Technology Conference Proceedings

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-This work presents the design of a 1 st -order sigmadelta thermal modulator using a thermoresistive sensor in its feedback loop, as the summing and integrating elements. The proposed system architecture allows the measurement of physical quantities that interact with the sensor, as temperature, thermal radiation and fluid velocity. Procedures for obtaining the design specifications needed for its modeling in VHDL-AMS are presented. A layout for the sigma-delta thermal modulator was developed for the integrated circuit technology CMOS 0.35 m. Simulation results from this layout for temperature measurement are presented, showing that a resolution of 8.7 bits was attained, for a input signal frequency range of 12.5 kHz and a sampling frequency of 25.6 MHz.

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“…For fluid with constant density and viscosity, the value of h is given by the King's modified equation, by [1]:…”

Section: A Thermoresistive Sensorsmentioning

confidence: 99%

Section: A Micro-sensormentioning

confidence: 99%

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CMOS sigma-delta thermal modulator

Almeida

Freire

Catunda

et al. 2010

2010 IEEE Instrumentation &Amp; Measurement Technology Conference Proceedings

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“…The silicon hot wire sensor (SHWS) operating in the constant current mode raises two difficulties with respect to its signal processing. One is the compensation for the fluid temperature (Al-Salaymeh and Ashhab 2006;Ziani et al 2011;Ferreira and Freire 2001) and the other is the linearization of highly nonlinear responses. In order to obtain an accurate and precise readout from a SHWS, the adverse effects of the environmental parameters and nonlinear characteristics must be suitably compensated.…”

Section: Introductionmentioning

confidence: 99%

Temperature compensation of micromachined silicon hot wire sensor using ANN technique

et al. 2012

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Temperature is one of the most important factors influencing accurate silicon sensor devices and is one of the largest sources of error in measurement. In this paper, a model based on Neural Networks (NN), has been implemented to generate fluid velocity data, knowing fluid temperature measurements. The proposed model based on neural networks can provide the calibrated response characteristics irrespective of change in the sensor characteristics due to change in ambient temperature. The NN-based sensor model automatically calibrates and compensates with high accuracy for the nonlinear response characteristics and nonlinear dependency of the sensor characteristics on the environmental parameters. Through extensive simulated experiments, we have shown that the NN-based silicon hot wire sensor model can provide flow speed readout with a maximum full-scale error of only 1.5% over a temperature range from 0 to 40°C for nonlinear dependencies.

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“…In the CTA architecture, the sensor is heated by an electrical current, due to the Joule effect, up to a reference temperature [4]. The temperature is kept constant through the use of feedback control, which compensates the thermal variations and reduces the system response time.…”

Section: Introductionmentioning

confidence: 99%

A controlled-temperature hot-wire anemometer with voltage feedback linearization

Araujo

Catunda

Dórea

et al. 2014

2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings

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This paper proposes a new architecture of a controlled-temperature hot-wire anemometer using voltage feedback linearization. The voltage feedback linearizes the sensor input-output relationship and the controller is designed to achieve null steady-state error and reduce the system response time. Analysis of the behavior of the architecture modeled using Simulink is presented for a NTC sensor. Simulation results are presented and discussed, and the architecture is compared with the classical constant-temperature anemometer (CTA) one.

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Hot-wire anemometer with temperature compensation using only one sensor

Cited by 39 publications

References 10 publications

CMOS sigma-delta thermal modulator

CMOS sigma-delta thermal modulator

Temperature compensation of micromachined silicon hot wire sensor using ANN technique

A controlled-temperature hot-wire anemometer with voltage feedback linearization

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