{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:41:46Z","timestamp":1760139706531,"version":"build-2065373602"},"reference-count":23,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2022,4,21]],"date-time":"2022-04-21T00:00:00Z","timestamp":1650499200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, we propose a temperature measurement method that uses ultrafine fluorescent wires to reduce the wire diameter to a much lesser extent than a thermocouple. This is possible because its structure is simple and any material can be used for the wire. Hence, ultrafine wires with a Reynolds number of less than 1.0 can be selected. Ultra-fine wires less than 50 \u00b5m in diameter were set in the test volume. The wire surfaces were coated with fluorescent paint. The test volume was illuminated using an ultraviolet light-emitting diode. The paint emits very tiny, orange-colored fluorescent light with an intensity that changes with the temperature of the atmosphere. The experimental results showed that the heating\/cooling layers were well visualized and the temperature field was well analyzed.<\/jats:p>","DOI":"10.3390\/s22093175","type":"journal-article","created":{"date-parts":[[2022,4,24]],"date-time":"2022-04-24T00:45:21Z","timestamp":1650761121000},"page":"3175","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Temperature Measurement of Hot Airflow Using Ultra-Fine Thermo-Sensitive Fluorescent Wires"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9599-9352","authenticated-orcid":false,"given":"Shumpei","family":"Funatani","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, University of Yamanashi, Yamanashi 400-8510, Japan"}]},{"given":"Yusaku","family":"Tsukamoto","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, University of Yamanashi, Yamanashi 400-8510, Japan"}]},{"given":"Koji","family":"Toriyama","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, University of Yamanashi, Yamanashi 400-8510, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3985","DOI":"10.1364\/OME.9.003985","article-title":"Micro optical sensors based on avalanching silicon light-emitting devices monolithically integrated on chips","volume":"9","author":"Xu","year":"2019","journal-title":"Opt. Mater. Express"},{"key":"ref_2","unstructured":"Wilcox, N.A., Watson, A.T., and Tatterson, G.B. (1985, January 23\u201326). Color\/Temperature Calibrations for Temperature Sensitive Tracer Particles. Proceedings of the International Symposium on Physical and Numerical Flow Visualization (Albuquerque), Albuquerque, NM, USA."},{"key":"ref_3","unstructured":"Kim, J.H., and Moffat, R.J. (1986). Improved Liquid-crystal Thermometry Excluding Human Color Sensation (Part 1: Concept and Calibration). Pressure and Temperature Measurements, ASME. HTD-58."},{"key":"ref_4","unstructured":"Khalighi, B., Braun, M.J., and Freitas, C.J. (1989). Quantitative Thermal Flow Visualization Using Color Image Processing (Application to a Natural Convection Visualized by Liquid Crystals). Flow Visualization, ASME. FED-85."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1007\/BF00190283","article-title":"Digital Particle Image Thermometry: The Method and Implementation","volume":"11","author":"Dabiri","year":"1991","journal-title":"Exp. Fluids"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1007\/BF00187298","article-title":"Flow and temperature measurement of natural convection in a Hele-Shaw cell using a thermo-sensitive liquid-crystal tracer","volume":"12","author":"Ozawa","year":"1992","journal-title":"Exp. Fluids"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1007\/BF00230257","article-title":"Application of liquid-crystal thermometry to drop temperature measurements","volume":"18","author":"Nozaki","year":"1995","journal-title":"Exp. Fluids"},{"key":"ref_8","unstructured":"Kobayashi, T., Saga, T., and Doh, D. (1997, January 8\u201311). A Three-dimensional Simultaneous Scalar and Vector Tracking Method. Proceedings of the 1st International Workshop on PIV (Fukui), Fukui, Japan."},{"key":"ref_9","unstructured":"Fujisawa, N., Adrian, R.J., and Keane, R.D. (1997, January 13\u201316). Three-dimensional Temperature Measurement in Turbulent Thermal Convection over Smooth and Rough Surfaces by Scanning Liquid Crystal Thermometry. Proceedings of the International Conference on Fluid Engineering (Tokyo), Tokyo, Japan."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1615\/JFlowVisImageProc.v1.i4.10","article-title":"Application of neural networks to quantitative flow visualization","volume":"1","author":"Kimura","year":"1993","journal-title":"J. Flow Vis. Image Process."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"6507","DOI":"10.1109\/JSEN.2015.2459139","article-title":"Analysis and Evaluation Between the First and the Second Generation of RGB-D Sensors","volume":"15","author":"Tombari","year":"2015","journal-title":"IEEE Sens. J."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Fujisawa, N., Saito, R., Matsuura, T., and Nakabayashi, T. (1998, January 15\u201320). Development of Liquid Crystal Thermometry for Three-dimensional Temperature Measurement and Its Application to Thermal Convection Phenomena. Proceedings of the ASME Heat Transfer Division (Anaheim), Anaheim, CA, USA.","DOI":"10.1115\/IMECE1998-0773"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2473","DOI":"10.1299\/kikaib.63.611_2473","article-title":"Temperature Measurement Using Thermosensitive Liquid Crystal (1st Report, Spectrum and Color Characteristics)","volume":"63","author":"Morimoto","year":"1997","journal-title":"Trans. JSME"},{"key":"ref_14","first-page":"135","article-title":"Expansion of Thermally Sensitive Range Using Two Different Density Liquid Crystal in Cooperation of Observation Angle Modification","volume":"19","author":"Hata","year":"1999","journal-title":"J. Vis. Soc. Jpn."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1007\/BF03181425","article-title":"Three-dimensional temperature measurement in turbulent thermal convection by extended range scanning liquid crystal thermometry","volume":"1","author":"Fujisawa","year":"1999","journal-title":"J. Vis."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1007\/BF03182508","article-title":"Temperature and velocity measurement of a 3-D thermal flow field using thermo-sensitive liquid crystals","volume":"1","author":"Kimura","year":"1998","journal-title":"J. Vis."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1007\/BF00944910","article-title":"Measurements of thermally stratified pipe flow using image-processing techniques","volume":"16","author":"Sakakibara","year":"1993","journal-title":"Exp. Fluids"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1007\/s003480050260","article-title":"Whole field measurement of temperature in water using two-color laser induced fluorescence","volume":"26","author":"Sakakibara","year":"1999","journal-title":"Exp. Fluids"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"983","DOI":"10.1088\/0957-0233\/15\/5\/030","article-title":"Simultaneous measurement of temperature and velocity using two-colour LIF combined with PIV with a colour CCD camera and its application to the turbulent buoyant plume","volume":"15","author":"Funatani","year":"2004","journal-title":"Meas. Sci. Technol."},{"key":"ref_20","first-page":"20","article-title":"Temperature Measurement of Air Flow Using Fluorescent Mists Combined with Two-Color LIF","volume":"1","author":"Funatani","year":"2013","journal-title":"J. Flow Control Meas. Vis."},{"key":"ref_21","unstructured":"Someya, S., Fukuta, M., Munakata, T., and Ito, H. (2017, January 27\u201330). A development of two-color thermometry with PIV using BAMG phosphor. Proceedings of the Ninth JSME-KSME Thermal and Fluids Engineering Conference, Paper No. TFEC9-1397, Okinawa, Japan."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"054001","DOI":"10.1088\/1361-6439\/abf333","article-title":"Silicon electro-optic micro-modulator fabricated in standard CMOS technology as components for all silicon monolithic integrated optoelectronic systems","volume":"31","author":"Xu","year":"2021","journal-title":"J. Micromech. Microeng."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"848","DOI":"10.1126\/science.aba5504","article-title":"Stretchable distributed fiber-optic sensors","volume":"370","author":"Bai","year":"2020","journal-title":"Science"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/9\/3175\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:58:00Z","timestamp":1760137080000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/9\/3175"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,4,21]]},"references-count":23,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2022,5]]}},"alternative-id":["s22093175"],"URL":"https:\/\/doi.org\/10.3390\/s22093175","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2022,4,21]]}}}