定電流型低雑音熱線風速計の試作研究

Authors :: TAKAGI, Shohei
Source :: 航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-697. 697:13
Publication Year :: 1982
Publisher :: 航空宇宙技術研究所, 1982.
Abstract: This report represents a production of a low noise hot-wire anemometer with a constant current mode. This instrument consists of a constant current circuit, a low noise amplifier and a frequency compensator. Newly designed circuits and several techniques that reduce electric noise are described in detail. A typical application for residual turbulence measurement in a wind tunnel is given. The performance of this instrument is satisfactory for the measurement of velocity fluctuations with a turbulence intensity of less than 0.05％ and with frequencies of up to 5kHz at the wind speed of 20m/s. If the heating current for the hot-wire is low, this system may be easily applied to a resistance thermometer.<br />資料番号: NALTR0697000<br />レポート番号: NAL TR-697

Language :: English
ISSN :: 03894010
Volume :: 697
Database :: OpenAIRE
Journal :: 航空宇宙技術研究所報告 = Technical Report of National Aerospace Laboratory TR-697
Accession number :: edsair.jairo.........896a0d5a6b23d3220515ce4fb9faed37