Use of temperature and humidity sensors to determine moisture content of Oolong tea

Sensors (Switzerland)

Volumn 14, Issue 8, 2014, Pages 15593-15609

  Chen, Andrew ^a   Chen, Hsuan Yu ^b   Chen, Chiachung ^b  

^a NATIONAL TAIWAN UNIVERSITY   (Taiwan)

^b NATIONAL CHUNG HSING UNIVERSITY   (Taiwan)

Author keywords

Equilibrium moisture content; Equilibrium relative humidity; Moisture measurement; Tea leaves; Uncertainty analysis

Indexed keywords

CALIBRATION; HUMIDITY SENSORS; UNCERTAINTY ANALYSIS; MOISTURE; MOISTURE CONTROL;

CALIBRATION EQUATIONS; ELECTRICAL DEVICES; EQUILIBRIUM MOISTURE CONTENTS; EQUILIBRIUM RELATIVE HUMIDITY; MOISTURE MEASUREMENT; TEA LEAVES; TEMPERATURE AND HUMIDITY SENSOR; TEMPERATURE AND RELATIVE HUMIDITY;

MOISTURE DETERMINATION;

EID: 84924877830     PISSN: 14248220     EISSN: None     Source Type: Journal    
DOI: 10.3390/s140815593     Document Type: Article

References (29)

1. Ghodake, H.M.; Goswami, T.K.; Chakraverty, A. Moisture sorption isotherms, heat of sorption and vaporization of withered leaves, black and green tea. J. Food Eng. 2007, 78, 827-835.
2. Chen, C.; Weng, Y. Moisture sorption isotherms of Oolang tea. Food Bioproc. Technol. 2010, 3, 226-233.
3. Mizukami, Y.; Sawai, Y.; Yamaguchi, Y. Moisture content measurement of tea leaves by electrical impedance and capacitance. Biosyst. Eng. 2006, 93, 293-299.
4. Meadocroft, D.B. Chemical analysis: Moisture Measurement. In Instrumentation Reference Book; Butterworth-Heinemann/Elsevier: Burlington, MA, USA, 2010; pp. 429-436.
5. Okamura, S.; Zhang, Y.; Tsukamoto, N. A new microstripline-type moisture sensor for heavily wet tea leaves. Meas. Sci. Technol. 2007, 18, 1022-1028.
6. Hazarika, D.; Laskar, S.; Sarma, A.; Sarmah, P.K. PC-Based instrumentation system for the detection of moisture content of tea leaves at its final stage. IEEE T. Instrum. Meas. 2006, 55, 1641-1647.
7. Jiang, Y.; Guo, L.; Yang, G. Developed BP algorithm in moisture content measurement. In Proceedings of 2006 IEEE International Conference on Industrial Informatics, Singapore, 16-18 August 2006.
8. Chen, C. Factors which effect equilibrium relative humidity of agricultural products. Trans. ASAE 2000, 43, 673-683.
9. Young, J.H. Moisture. In Instrumentation and Measurement for Environmental Sciences; Chapter 7; ASABE: St. Joseph, MI, USA, 1983.
10. Chen, C. Moisture measurement of grain using humidity sensors. Trans. ASAE 2001, 44, 1241-1245.
11. Tangirala, P.; Heath, J.R.; Radun, A.; Conners, T. A hand-held programmable-Logic-Device based temperature and relative-humidity sensor, processor and display system platform for automation and control of industry processes. IEEE Trans. Ind. Appl. 2008, 46, 1619-1629.
12. Uddin, M.S.; Armstrong, P.R.; Zhang, N. Accuracy of grain moisture content prediction using temperature and relative humidity sensors. Appl. Eng. Agric. 2006, 22, 267-273.
13. Gold, K.; Manger, K. Measuring Seed Moisture Status Using a Hygrometer. Technical Information Sheet 05; Board of Trustees of the Royal Botanic Gardens: Kew West Sussex, UK, 2008
14. Karrfalt, R.P. Equilibrium relative humidity as a tool to monitor seed moisture. In Proceedings of the Forest and Conservation Nursery Associations-2009, Fort Collins, CO, USA, July 2009.
15. Wernecke, R.; Wernecke, J. Moisture Measurement in the Building Industry. In Industrial Moisture and Humidity Measurement: A Practical Guide, 1st ed.; Wiley-VCH Verlag GmbH & Co. HGaA: Weinheim, Germany, 2014; pp. 361-384.
16. Chen, C.; Morey, R.V. Equilibrium relativity humidity (ERH) relationships for yellow-dent corn. Trans. ASAE 1989, 32, 999-1006.
17. Chen, C. A rapid method to determine the sorption isotherms of peanuts. J. Agr. Eng. Res. 2000b, 75, 401-408.
18. Chen, C. Sorption isotherms of sweet potato slices. Biosyst. Eng. 2002a, 83, 85-95.
19. Chen. C. Moisture sorption isotherms of pea seeds. J. Food Eng. 2002b, 58, 45-51.
20. ASABE, ASABE Standards. ASAE D245.6.15 DEC02: Moisture Relationships of Plant-Based Agricultural Products; ASABE: St. Joseph, MI, USA, 2007.
21. Arslan, N.; Togrul, H. The fitting of various models to water sorption isotherms of tea stored in a chamber under controlled temperature and humidity. J. Stored Prod. Res. 2006, 42, 112-135.
22. Panchariya, P.C.; Popovic, D.; Sharma, A.L. Modeling of desorption isotherm of black tea. Dry. Technol. 2001, 19, 1177-1188.
23. Temple, S.J.; van Boxtel, A.J.B. Equilibrium moisture content of tea. J. Agr. Eng. Res. 1999, 74, 83-89.
24. Lu, H.; Chen, C. Uncertainty evaluation of humidity sensors calibrated by saturated salt solutions. Measurement 2007, 40, 591-599.
25. Shen, Y.; Chen, C. Preparation of reference materials for rice kernels. Biosyst. Eng. 2007, 97, 41-49.
26. Chen, C. Evaluation of measurement uncertainty for thermometers with calibration equations. Accredit. Qual. Assur. 2005, 11, 75-82.
27. Oswin, C. The kinetics of package life. III. The isotherm. J. Soc. Chem. Ind. 1946, 65, 419-421.
28. Botheju, S.W.; Amaratunge, K.S.P.; Abeysinghe, I.S.B. Modeling desorption isotherms and thermodynamic properties of fresh tea leaves (Camellia sinensis var. assamica). Int. J. of Food Eng. 2012, 8, 1-16.
29. ISO/IEC., ISO/IEC 98-3. Uncertainty of Measurement-Part 3: Guide to the Expression of Uncertainty in Measurement, ISO ed.; ISO/IEC: Geneva, Switzerland, 2010.