Chinese Optics, Volume. 15, Issue 4, 780(2022)
Uncertainty analysis and evaluation of a high-precision radiative heat-flux meter
Figures & Tables(13)
Fig. 2. Schematic diagram of the measurement principle of a radiometric heat-flux meter
Fig. 3. Schematic diagram of optical path for absorptance measurement
Fig. 5. Schematic diagram of the diffraction effect on the heat-flux meter
Table 1. Measurement results of absorptance
View tableView in ArticleTable 1. Measurement results of absorptance
黑体腔信号电压UC/V 白板信号电压US/V 背景信号电压UB/V 白板反射率 ${\rho _{\rm{S}}}$ 均值 不确定度 均值 不确定度 均值 不确定度 均值 不确定度 0.03753 4×10−5 8.87058 1.284×10−4 0.02479 4×10−5 0.95 0.05
Table 2. Measurement results of the aperture’s diameter
View tableView in ArticleTable 2. Measurement results of the aperture’s diameter
项目 D/mm 方向1 2.220 方向2 2.221 方向3 2.219 方向4 2.220 均值 2.220
Table 3. Uncertainty of the sampling value of the heating voltage
View tableView in ArticleTable 3. Uncertainty of the sampling value of the heating voltage
加热电压 u(ADr)/V u(Vrefm)/V u(VerfT)/V u(ADS)/V u(Verfs)/V 均值/V u(U)/V ur(U)/V 第一阶段 0.0001635 5×10−6 4×10−6 0.000542 4.5571×10−6 0.69 0.000566 0.082% 第二阶段 0.0001635 5×10−6 4×10−6 0.000438 4.5571×10−6 2.19 0.000468 0.021%
Table 4. Uncertainty of resistance of the heating wire
View tableView in ArticleTable 4. Uncertainty of resistance of the heating wire
u(Rm)/Ω u(RS)/Ω 均值/Ω u(R)/Ω ur(R)/Ω 0.000015 0.00314 477.8 0.00314 0.00066%
Table 5. Uncertainty of the thermoelectric sampling code value
View tableView in ArticleTable 5. Uncertainty of the thermoelectric sampling code value
Mstatei Mstatei+1 Mtext 均值 172.1429 1731.18 513.9392 标准不确定度 0.15498 0.24591 0.0017 相对不确定度 0.09% 0.014% 0.003%
Table 6. Diffraction parameter definitions
View tableView in ArticleTable 6. Diffraction parameter definitions
r/mm ds/mm rd/mm dd/mm R/mm v0 σ u v vs vd 175 100 4 2 1 $ {\rm{Max} }\left( { {v_{\rm{s}}},{v_{\rm{d}}} } \right)$ $\dfrac{ { {\rm{Min} }\left( { {v_{\rm{s}}},{v_{\rm{d}}} } \right)} }{ { {\rm{Max} }\left( { {v_{\rm{s}}},{v_{\rm{d}}} } \right)} }$ $u = \dfrac{ {2\text{π} } }{\lambda }{R^2}\left( {\dfrac{1}{ { {d_{\rm{d} } } } } - \dfrac{1}{ { {d_{\rm{s} } } } } } \right)$ $ {v_0}(1 + \sigma x) $ $ \dfrac{ {2{\text{π}} } }{\lambda }\dfrac{ {R{r_{\rm{s}}} } }{ { {d_{\rm{s}}} } }$ ${v_d} = \dfrac{ {2{\text{π}} } }{\lambda }\dfrac{ {R{r_{\rm{d}}} } }{ { {d_{\rm{d}}} } }$
Table 7. Test results of power
View tableView in ArticleTable 7. Test results of power
测量次数 辐射热流计样机功率 测量结果/mW 标准探测器功率 测量结果/mW 1 0.98081 0.98886 2 0.98070 0.98889 3 0.98012 0.98885 4 0.98006 0.98887 5 0.97908 0.98890 6 0.97942 0.98893 7 0.97931 0.98890 8 0.98024 0.98891 9 0.97977 0.98891 10 0.97884 0.98891 11 0.97931 0.98890 12 0.97832 0.98890 均值 0.97967 0.98889
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Xiang-yuan ZHENG, Xin YE, Zhi-tao LUO, Kuo-chuan WANG, Bao-qi SONG. Uncertainty analysis and evaluation of a high-precision radiative heat-flux meter[J]. Chinese Optics, 2022, 15(4): 780
Paper Information
Category: Original Article
Received: Feb. 8, 2022
Accepted: --
Published Online: Sep. 6, 2022
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