scholarly journals A research on monitoring the canopy temperature variation of rice based on the infrared thermal imaging technique

Author(s):  
Mingchao Gao ◽  
Qiyun Li ◽  
Jiping Gao ◽  
Jihong Li ◽  
Wenzhong Zhang ◽  
...  
2007 ◽  
Vol 35 (02) ◽  
pp. 231-240 ◽  
Author(s):  
Hong-Qin Yang ◽  
Shu-Sen Xie ◽  
Xiang-Long Hu ◽  
Li Chen ◽  
Hui Li

The meridians and acupoints of human bodies at natural condition are investigated among 30 healthy volunteers by infrared thermal imaging technique. The results give clear evidence of the existence of infrared radiant tracks along human meridian courses. The time dependent evolution of the infrared radiant track is observed for the first time. The time rhythm of acupoints is also studied. Our findings not only support the view that infrared radiant tracks along human meridian courses is a normal vital and physiological phenomenon appearing in human beings, but also offer a potential method for noninvasive diagnostic by studying the physiological function and pathological change of meridians or acupoints by means of thermography.


2014 ◽  
Vol 511-512 ◽  
pp. 425-428
Author(s):  
Jie Jiang ◽  
Wen Da Zhu ◽  
Gong Sheng Yang ◽  
Jing Peng Yan ◽  
Nan Jin Gao ◽  
...  

Liquefied natural gas (LNG) is obtained by cooling the gas temperature to -162 degree. Problems with the steel cans, the insulation layer or the concrete tank of the LNG tank can lead to changes of the temperature, local temperature decreases, and the safety of the tank is threatening. Through the combination of many sets of infrared thermal imager to monitor the temperature of the LNG storage tank’s sidewall, analyze the heat imagine, establish the corresponding relationship between the locations on the sidewall of the LNG tank and on the heat imagine, determine the position of the temperature point on the tank wall. Infrared thermal imaging technique for the sidewall of LNG storage tank can find out the heat abnormal conditions and fixing the temperature drop area in time, and provide powerful guarantee for the safe storage of the liquefied natural gas.


Author(s):  
Hao Zeng ◽  
Chao‐sheng Tang ◽  
Cheng Zhu ◽  
Qing Cheng ◽  
Zong‐ze Lin ◽  
...  

2010 ◽  
Vol 4 (6) ◽  
pp. 1386-1392 ◽  
Author(s):  
Subramnaiam Bagavathiappan ◽  
John Philip ◽  
Tammana Jayakumar ◽  
Baldev Raj ◽  
Pallela Narayana Someshwar Rao ◽  
...  

2012 ◽  
Vol 4 ◽  
pp. 172-178 ◽  
Author(s):  
M.J. Suriani ◽  
A. Ali ◽  
A. Khalina ◽  
S.M. Sapuan ◽  
S. Abdullah

2015 ◽  
Vol 30 (2) ◽  
pp. 91-97 ◽  
Author(s):  
Farag Mahmoud ◽  
Hatem Mahfouz

Wheat (Triticum sativum L.) is one of the most important cereal crops in Egypt. Insect pests, such as aphids, are major threats in terms of yield reduction. Induced resistance in wheat using salicylic acid as a foliar application was tested on the farm of the Faculty of Agriculture, Suez Canal University during 2012/2013 and 2013/2014 seasons. Three wheat cultivars, Gemeza 9, Sakha 93 and Giza 168, were sprayed three times with two concentrations of salicylic acid (SA), 200 mg/l and 100 mg/l, after early detection of aphid infestation by infrared thermal imaging. The infrared thermal imaging technique is based on significant differences in surface temperature between infested and healthy leaves. Imaging data are digital, and a computer program can be used to detect infestation rapidly. The results showed that aphid infestation raised the temperature of infested leaves, compared to healthy leaves. The range temperature difference between maximum and minimum temperatures (At) was 1.1 ?C in healthy leaves and 3.9 ?C in infected leaves. The results of SA application showed significant differences in the mean number of aphids and in reduction of infestation among treatments and cultivars. The higher of the two SA rates (200 mg/l) gave higher efficacy in the three cultivars than the lower rate (100 mg/l) over the five weeks of trial. The highest efficacy against aphids was reached one week after application (86.28% for Giza, 85.89% for Gemesa and 70.54% for Sakha). Moreover, SA treatment enhanced the wheat yield of all three cultivars, compared with control plants. The three cultivars (Giza, Gemesa and Sakha) produced higher yields than the control when sprayed with 200 mg/l SA. Their grain yield was 2,491.5, 2,455.0, and 2,327.25 kg/feddan (1 fed = 0.42 ha), respectively. In conclusion, infrared thermal imaging can be employed in identification of infected leaves. Also, the application of SA on wheat induced plant resistance to aphids.


2011 ◽  
Vol 403-408 ◽  
pp. 675-679
Author(s):  
Wen Chao Zhang ◽  
Hong Zheng Peng ◽  
Chun Long Su

Bridgewire of a thin resistive wire widely used in electric explosive devices (EED) as a transducer of electronic energy to thermal energy provide the ignition of energetic compounds. In this paper the temperature variation laws of bridgewire as core component and most sensitive part for EED under the constant current were investigated though infrared measuring temperature system. The result indicates that the thermodynamic equilibrium from the bridgewire was realized in two senconds and the maximum temperature for bridgewire caused by the current rises as quadratic parabola with increasing of current acting on bridgewire. Meanwhile the safety current for bridgewire with large diameter is higher than that for bridgewire with small diameter. The maximum temperature variation curve for bridgewire of different diameters with current received from the infrared thermal imaging can provide the quantitative evidence supporting the predication of safety current for bridgewire and guidelines for engnieers to realize the activation of EED as expected safely.


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