Using strain gages to measure both strain and temperature

Cappa, Paolo; Rita, G. De; McConnell, K. G.; Zachary, L. W.

doi:10.1007/bf02319360

Cited by 21 publications

(16 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, MPA‐ and EDT‐treated thin films show an exponential decrease in resistance as temperature increases, as seen in Figure b. This indicates hopping transport, where electrons can hop to neighboring NCs more readily at higher temperatures . Hopping transport has an Arrhenius temperature dependence, which can be expressed by an exponential function:

R = R_{0} e (\frac{E_{a}}{k_{B} T}) e^{(β l)}

where k B , E a , T , β, and l are the Boltzmann constant, the activation energy for thermally induced hopping, temperature, the tunneling decay constant, and the interparticle distance of the NCs, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…The resistance of pure metallic materials is known to be proportional to temperature and strain, and can be expressed as follows:

\frac{Δ R}{R_{0}} = α Δ T + G ε

where α corresponds to the TCR, Δ T is the temperature change in the Ag NC thin film, G is the gauge factor, and ε is the strain applied to the material. Higher order terms such as the thermal expansion coefficients of the substrate and NCs are not considered because resistance changes originating from these terms are minimal, and therefore, inconsequential . When calculating the TCR value for TBAB‐ and NH 4 Cl‐treated Ag NC thin films, the effects of strain can also be neglected because rigid substrates such as glass experience zero strain.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Engineering the Charge Transport of Ag Nanocrystals for Highly Accurate, Wearable Temperature Sensors through All-Solution Processes

Joh

Lee

Seong

et al. 2017

Small

View full text Add to dashboard Cite

All-nanocrystal (NC)-based and all-solution-processed wearable resistance temperature detectors (RTDs) are introduced. The charge transport mechanisms of Ag NC thin films are engineered through various ligand treatments to design high performance RTDs. Highly conductive Ag NC thin films exhibiting metallic transport behavior with high positive temperature coefficients of resistance (TCRs) are achieved through tetrabutylammonium bromide treatment. Ag NC thin films showing hopping transport with high negative TCRs are created through organic ligand treatment. All-solution-based, one-step photolithography techniques that integrate two distinct opposite-sign TCR Ag NC thin films into an ultrathin single device are developed to decouple the mechanical effects such as human motion. The unconventional materials design and strategy enables highly accurate, sensitive, wearable and motion-free RTDs, demonstrated by experiments on moving or curved objects such as human skin, and simulation results based on charge transport analysis. This strategy provides a low cost and simple method to design wearable multifunctional sensors with high sensitivity which could be utilized in various fields such as biointegrated sensors or electronic skin.

show abstract

R = R_{0} e (\frac{E_{a}}{k_{B} T}) e^{(β l)}

Section: Resultsmentioning

confidence: 97%

“…The resistance of pure metallic materials is known to be proportional to temperature and strain, and can be expressed as follows:

\frac{Δ R}{R_{0}} = α Δ T + G ε

Section: Resultsmentioning

confidence: 99%

Engineering the Charge Transport of Ag Nanocrystals for Highly Accurate, Wearable Temperature Sensors through All-Solution Processes

Joh

Lee

Seong

et al. 2017

Small

View full text Add to dashboard Cite

show abstract

“…(17) are functions of temperature themselves. The transducer diaphragm where the strain gauge is bonded can also contract or elongate with temperature changes (Cappa et al, 1992;Richards, 1996;Vishay Micro-Measurement, 2007). This thermal output error is more prominent than that produced from the extraction or expansion of air column inside the venting tube in this experiment.…”

Section: Laboratory Resultsmentioning

confidence: 99%

Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?

Liu

Higgins

2015

Geosci. Instrum. Method. Data Syst.

View full text Add to dashboard Cite

Abstract. Submersible pressure transducers have been utilized for collecting water level data since the early 1960s. Together with a digital data logger, it is a convenient way to record water level fluctuations for long-term monitoring. Despite the wide use of pressure transducers for water level monitoring, little has been reported regarding their accuracy and performance under field conditions. The effects of temperature fluctuations on the output of vented pressure transducers were considered in this study. The pressure transducers were tested under both laboratory and field conditions. The results of this study indicate that temperature fluctuation has a strong effect on the transducer output. Rapid changes in temperature introduce noise and fluctuations in the water level readings under a constant hydraulic head while the absolute temperature is also related to sensor errors. The former is attributed to venting and the latter is attributed to temperature compensation effects in the strain gauges. Individual pressure transducers responded differently to the thermal fluctuations in the same testing environment. In the field of surface hydrology, especially when monitoring fine-scale water level fluctuations, ignoring or failing to compensate for the temperature effect can introduce considerable error into pressure transducer readings. It is recommended that a performance test for the pressure transducer is conducted before field deployment.

show abstract

“…Switch the selector to connect the calibration unit and set values (E~,,,E~~,,) that are close to the strain gauge outputs and read the digital strain metre readout ( E~, ,~~, E~~, , , , ) . 3. Evaluate the calibration coefficient.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

A temperature calibration of a temperature/strain transducer based on two strain gauges

Cappa

McConnell

Zachary

1993

Strain

Self Cite

View full text Add to dashboard Cite

The operution of u tenzperuturehtruin trunsiluciv-, culled "duplex gauge", based on two electrical resistunce strnin gauges, that ure tenzperuture conzpmsutd f o r ust on muterials with d$fieront coqficients of linour expunsion, was briqjly recalled Three steel specinzens were equipped with "duplex gauges" and wore subjljrctivl to tenzperuture vuriutions andno externul b i r d s were uppliecl. The chosen experinzentul setup (i) to nzeusure the outputs of the gauge tenzperuture conzpensutecl .for steel mil tituniunz silicato ancl (ii) to inzpose known tcwzperuture, u s s u r d good uccurucy und precision in evuluation of thc tenipcmture calibrution curve. The obtained results showed thut the struin differences could he consirlmrl, ut least ,for the experinientul urranpnzent exuniind, 11 1inwr.function of tenzperuture over the range of 2 0 to over 140°C. The prepured culihrution chnrt, thut ullows tht correction of tenzperuture induced uppurent sti-uin, will he usedin,futuro resmrch when generic trnzpruturp rind struin Jie1rl.v ore iipplied to spcwnzons.

show abstract

Using strain gages to measure both strain and temperature

Cited by 21 publications

References 2 publications

Engineering the Charge Transport of Ag Nanocrystals for Highly Accurate, Wearable Temperature Sensors through All-Solution Processes

Engineering the Charge Transport of Ag Nanocrystals for Highly Accurate, Wearable Temperature Sensors through All-Solution Processes

Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?

A temperature calibration of a temperature/strain transducer based on two strain gauges

Contact Info

Product

Resources

About