<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>A dual slope direct digital converter (DSDDC) suitable for resistive sensor elements already connected in a bridge form is presented. A conventional dual slope analog to digital converter (DS-ADC) is altered with an intentionally introduced instrumentation amplifier (INA) to realize the proposed DDC. The DSDDC accepts bridge connected resistive sensor elements as input and provides a digital output that is proportional to the quantity being sensed by the sensor elements. The results obtained from simulation of the proposed DSDDC indicate a worst case error in the output to be &lt; ±0.03 %. Experimental results from a prototype unit, presented herein, demonstrate the practicality the scheme. Worst case error of the prototype unit was found to be &lt; ±0.07 % with test conducted using standard decade resistance boxes emulating the sensor elements. The worst case error in the prototype was &lt; ±0.05 % when tested with a load-cell made of four strain gauges.</p>
</abstract>

A dual slope direct digital converter (DSDDC) suitable for resistive sensor elements already connected in a bridge form is presented. A conventional dual slope analog to digital converter (DS-ADC) is altered with an intentionally introduced instrumentation amplifier (INA) to realize the proposed DDC. The DSDDC accepts bridge connected resistive sensor elements as input and provides a digital output that is proportional to the quantity being sensed by the sensor elements. The results obtained from simulation of the proposed DSDDC indicate a worst case error in the output to be < ±0.03 %. Experimental results from a prototype unit, presented herein, demonstrate the practicality the scheme. Worst case error of the prototype unit was found to be < ±0.07 % with test conducted using standard decade resistance boxes emulating the sensor elements. The worst case error in the prototype was < ±0.05 % when tested with a load-cell made of four strain gauges.

Dual Slope Direct Digital Converter for Bridge Connected Resistive Sensors

International Journal on Smart Sensing and Intelligent Systems

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"Dual Slope Direct Digital Converter for Bridge Connected Resistive Sensors"}

A dual slope direct digital converter (DSDDC) suitable for resistive sensor elements already connected in a bridge form is presented. A conventional dual slope...

Dual Slope Direct Digital Converter for Bridge Connected Resistive Sensors

Published Online: Feb 15, 2020

Page range: 1 - 5

DOI: https://doi.org/10.21307/ijssis-2019-070

Keywords
Direct digital converter, Resistive sensors, Strain gauges, Wheatstone bridge, Instrumentation amplifier, Dual slope digital converter

© 2019 Authors., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Dual Slope Direct Digital Converter for Bridge Connected Resistive Sensors

Published Online: Feb 15, 2020

Page range: 1 - 5

DOI: https://doi.org/10.21307/ijssis-2019-070

KeywordsDirect digital converter, Resistive sensors, Strain gauges, Wheatstone bridge, Instrumentation amplifier, Dual slope digital converter

© 2019 Authors., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Direct digital converter, Resistive sensors, Strain gauges, Wheatstone bridge, Instrumentation amplifier, Dual slope digital converter