JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Experimental Study on Output Characteristics of a Variable Temperature Anemometer Adopting a Photoconductive Cell and Stabilizing Circuit
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Experimental Study on Output Characteristics of a Variable Temperature Anemometer Adopting a Photoconductive Cell and Stabilizing Circuit
Lee, Sin-Pyo;
  PDF(new window)
 Abstract
Variable temperature anemometer(VTA) has greater sensitivity than a conventional constant temperature anemometer(CTA). In order to design a reliable VTA system, however, an elaborate photoconductive cell stabilizing circuit which plays a key role in setting wire-overheat ratio should be firstly developed. In this study, a stabilizing circuit which adopts proportional-integral analog controller was proposed and thoroughly tested for its accuracy and reproducibility. In contrast to the available circuit suggested by Takagi, the present circuit has characteristic that the resistance of a photoconductive cell increases with the increase of input voltage, which makes the current circuit very suitable for the design of VTA. Finally, VTA adopting stabilizing circuit was made and the enhanced sensitivity of the VTA was validated experimentally by comparing the calibration curves of VTA and CTA.
 Keywords
Photoconductive Cell;Output Drift;Variable Temperature Anemometer;Stabilizing Circuit;
 Language
Korean
 Cited by
 References
1.
Takagi, S., 1994, 'The Status and Future of Hot-wire Anemometer,' Reasarch of Machinery, Vol. 46, No. 6, pp. 61-67

2.
이신표, 고상근, 1995, '유속에 따른 열선의 과열비 조정을 통한 연선 유속계의 감도현상에 관한 연구,' 대한기계학회논문집, 제19권, 제10호, pp. 2678-2689

3.
Lee, S. and Kauh, S, 1997, 'A New Approach to Enhance the Sensitivity of a Hot-wire Anemometer and Response Analysis of a VTA,' Experiments in Fiuid, Vol. 22, pp. 212-219 crossref(new window)

4.
Ligeza, P., 1998, 'A modified temperature-compensation circuit for CTA,' Meas. Sci. Technol., Vol. 9, pp. 452-457 crossref(new window)

5.
Lee, S., Kim, J. and Kauh, S., 1995, 'Temperature Compensation of Hot-wire Anemometer with Photoconductive Cell,' Experiments in Fluids, Vol. 19, pp. 362-365 crossref(new window)

6.
谷腰欣司, 이종락 역, 1995, 광센서와 그 사용법, 세화, 서울, pp. 146-166

7.
Bruun, H., 1995, Hot-wire Anemometry, Oxford University Press, Oxford, pp. 94-105

8.
이신표, 고상근, 1996, '광도전성저항을 이용한 열선유속계의 하드웨어적 온도보상에 관한 연구,' 대한기계학회논문집 B권, 제20권, 제11호, pp. 3555-3675

9.
Coughlin, R. and Driscoll, F., 1991, Operational Amplifier and Linear Integrated Circuit, Prentice Hall, New Jersey, pp. 201-208

10.
김진권, 강신형, 2000, '삼직교 열선유속계의 간편한 측정법 개발,' 대한기계학회논문집 B권, 제24권, 제1호, pp. 85-92