A general in situ probe spacing correction method for dual probe heat pulse sensor
A general in situ probe spacing correction method for dual probe heat pulse sensor
复制标题
双探头热脉冲传感器通用原位探头间距校正方法
DOI：
10.1016/j.agrformet.2016.05.011
复制
发表时间：
2016-10
影响因子：
6.2
通讯作者：
Hu Kelin
中科院分区：
文献类型：
--
作者：
Liu Gang;Wen Minmin;Ren Ruiqi;Si Bing;Horton Robert;Hu Kelin
双探针热脉冲法（DPHP）在测量土壤热特性方面越来越受欢迎。然而，由于DPHP测量的土壤热容(c)对探头间距变化非常敏感，探头挠度导致测量误差较大。针对探头挠度问题，Liu等（2013）提出了一种原位探头间距校正方法，但该方法基于线内挠度假设。Wen et al.（2015）发现，对于非内联偏转DPHP传感器，Liu et al.（2013）的方法对误差的降低效果较差。为了解决非直线偏转的问题，在本研究中，我们引入了一种新的DPHP传感器设计，该传感器在同一温度探头内使用三个热敏电阻。提出了一种相应的非内联偏转探头间距校正方法。通过数值模拟和实验对新模型进行了验证。我们定义θ为探头偏离垂直方向的倾斜角。对于向外偏转（5.8°< θ <6.8°）的实验，误差范围为- 23% ~ - 76%；在线原位校正后，误差减小到12% ~ 44%；在使用我们的非直线原位校正后，误差在1%到8%之间。我们的三维有限元数值模拟也表明，与Liu et al.（2013）的方法相比，新的传感器和校正方法可以显著消除探针挠度带来的误差。新的DPHP传感器设计和非直线挠度模型有可能取代Liu等人（2013）的方法，成为原位校正探头间距的标准方法。
The dual probe heat pulse (DPHP) method is gaining popularity for measuring soil thermal properties. However, because of the fact that the DPHP measured heat capacity (c) of soil is hyper-sensitive to probe spacing variation, probe deflection causes large error in the measuredc. To deal with probe deflection, recently, Liu et al. (2013) has proposed an in situ probe spacing correction method, but, their method was based on the inline deflection assumption. Wen et al. (2015) found that for non-inline deflected DPHP sensors, the method of Liu et al. (2013) provided poor reduction of the error inc. To cope with the non-inline deflection, in this study, we introduce a new DPHP sensor design by using three thermistors within the same temperature probe. A related probe spacing correction method for non-inline deflected probes was also presented. Both numerical simulation and experiment were conducted to test the new model. We define θ as the inclination angle of the probe deviation from the vertical direction. For experiment of the outward deflection (5.8° < θ <6.8°), the error incis in the range from −23% to −76%; after inline in situ correction, the error decreases to the range of 12% to 44%; after using our non-inline in situ correction, the error is between 1% and 8%. Our three-dimensional finite element numerical simulation also demonstrates that, compared with the method of Liu et al. (2013), the new sensor and correcting method can significantly eliminate errors inccaused by probe deflections. The new DPHP sensor design and the non-inline deflection model have the potential to replace the method of Liu et al. (2013), and become the standard method for correcting probe spacing in situ.
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影响因子：
2.9
作者：
Liu, Gang;Li, Baoguo;Si, Bing C.
通讯作者：
Si, Bing C.
DOI：
10.2136/sssaj1993.03615995005700060008x
发表时间：
1993-11-01
影响因子：
2.9
作者：
KLUITENBERG, GJ;HAM, JM;BRISTOW, KL
通讯作者：
BRISTOW, KL
用于现场校准探头间距的自校准双探头热脉冲传感器
影响因子：
2.9
作者：
Liu, Gang;Wen, Minmin;Horton, Robert
通讯作者：
Horton, Robert
DOI：
10.1175/2007jhm963.1
发表时间：
2008-02
期刊：
--
影响因子：
--
作者：
J. Heitman;R. Horton;T. DeSutter
通讯作者：
J. Heitman;R. Horton;T. DeSutter
自校正双探头热脉冲传感器的评估
影响因子：
6.2
作者：
Wen Minmin;Liu Gang;Li Baoguo;Si Bing C.;Horton Robert
通讯作者：
Horton Robert