Analysis of the Wheatstone Bridge Radiometer Performance Dependence on the Ambient Temperature

Segundo, Jose Taunai Dantas; Dantas, Evandson Claude Seabra; Catunda, S.Y.C.; Belfort, Diomadson Rodrigues

doi:10.1109/inscit49950.2021.9557255

Cited by 2 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To analyze the performance of the CT and CTD Wheatstone bridge architecture, consider that the ambient temperature varies from 0 to 60

C, and the incident radiation varies between 0 and 1600 kW/m

and

V. The sensor and parameters for the CT and CTD architectures are summarized in Table 2 and Table 3 , respectively. The parameters presented were adapted from [ 1 , 7 , 11 ] with computed values from Equation ( 12 ), which avoid any temperature saturation, and ( 13 ), which optimize the value of

for CTD architecture.…”

Section: Results and Analysismentioning

confidence: 99%

“…The Wheatstone CT and CTD bridge architecture, shown in Figure 2 and Figure 3 , were simulated using a thermistor model provided in [ 1 ]. The simulation parameters are summarized as follows: Table 5 contains the CT Wheatstone bridge architecture sensor parameters; Table 6 contains the CT Wheatstone bridge architecture fixed resistances that allow

to be

C; Table 7 contains the CTD Wheatstone bridge architecture sensor parameters; Table 8 contains the CTD Wheatstone bridge architecture fixed resistances that allow

to be

C; Table 9 contains simulation parameters shared between CT and CTD Wheatstone bridge architecture.…”

Section: Results and Analysismentioning

confidence: 99%

“…Pyranometers are devices used to measure solar radiation that are composed of direct and diffuse incident radiation [ 1 ]. It is used, for example, to measure the energy transfer rate per unit area to produce the Global Horizontal Irradiation (GHI), which, in turn, is used to determine the energy potential for photovoltaic systems in a region [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…The ambient temperature directly affects the sensor thermal balance, which, for the architecture with the sensor operating at a constant temperature, has an important effect on the sensitivity of the system, among other parameters [ 1 ]. In this paper, we propose an analog pyranometer architecture based on the EEP that operates with a controlled temperature difference, which has the main advantage of mitigating the influence of ambient temperature variation of the system performance.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Architecture of an Electrical Equivalence Pyranometer with Temperature Difference Analog Control

Dantas

Segundo

Catunda

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

In this paper, an architecture of an electrical equivalence pyranometer with analog control of the temperature difference is presented. The classical electrical equivalence pyranometer employs a Wheatstone bridge with a feedback amplifier to keep the sensor operating at a constant temperature to estimate the incident radiation through the sensor thermal balance employing the electrical equivalence principal. However, this architecture presents limitations under ambient temperature variation, such as sensitivity variation. To overcome those limitations, we propose an architecture that controls the temperature difference between the sensor and ambient via an analog compensating circuit. Analytical results show an improvement near five times in sensitivity over the ambient temperature span and 76.3% increase of useful output voltage. A prototype was developed and validated with a commercial pyranometer, showing a high agreement on the measurement results. It is verified that the use of temperature difference, rather than constant temperature, significantly reduces the effect of ambient temperature variation.

show abstract

“…To analyze the performance of the CT and CTD Wheatstone bridge architecture, consider that the ambient temperature varies from 0 to 60

C, and the incident radiation varies between 0 and 1600 kW/m

and

for CTD architecture.…”

Section: Results and Analysismentioning

confidence: 99%

to be

C; Table 7 contains the CTD Wheatstone bridge architecture sensor parameters; Table 8 contains the CTD Wheatstone bridge architecture fixed resistances that allow

to be

C; Table 9 contains simulation parameters shared between CT and CTD Wheatstone bridge architecture.…”

Section: Results and Analysismentioning

confidence: 99%