Zhao Xiang, Rose Joseph L
FBS Incorporated DBA Guidedwave, 450 Rolling Ridge Drive, Bellefonte, PA 16823, United States.
The Pennsylvania State University, University Park, PA 16802, United States.
Ultrasonics. 2016 Apr;67:212-219. doi: 10.1016/j.ultras.2015.12.005. Epub 2015 Dec 17.
Of great concern for many structures, particularly critical sections of rotary and fixed wing aircrafts, is the ability to detect ice either on grounded or in-flight vehicles. As a consequence, some work is reported here that could be useful for a variety of different industries where ice formation is an important problem. This paper presents experimental validations of a probability-based reconstruction algorithm (PRA) on ice detection of plate-like structures. The ice detection tests are performed for three different specimens: a single layer aluminum plate with a circular ice sensing array, a titanium plate with a sparse rectangular ice sensing array, and a carbon-fiber-reinforced titanium plate with an embedded ice sensing array mounted on a carbon fiber back plate. Cases from the simple to the more challenging exemplify that special modes can be used to differentiate ice from water, a sparse rectangular array could also be used for ice detection, and an ice sensing array could be further used to detect the ice on the sensor free side, a very useful application of ice sensing for aircraft wings, for example. Ice detection images for the respective cases are reconstructed to investigate the feasibility of ice sensing with ultrasonic guided wave tomography technology. The results show that the PRA based ultrasonic guided wave tomography method successfully detected and showed ice spots correctly for all three cases. This corroborates the fact that ultrasonic guided wave imaging technology could be a potential useful ice sensing tool in plate-like structures.
对于许多结构，尤其是旋翼和固定翼飞机的关键部位而言，能够检测地面或飞行中的飞行器上的结冰情况至关重要。因此，本文报道了一些研究工作，这些工作可能对各种不同行业有用，在这些行业中结冰是一个重要问题。本文介绍了一种基于概率的重建算法（PRA）在板状结构结冰检测方面的实验验证。结冰检测试验针对三种不同的试样进行：带有圆形结冰传感阵列的单层铝板、带有稀疏矩形结冰传感阵列的钛板以及安装在碳纤维背板上带有嵌入式结冰传感阵列的碳纤维增强钛板。从简单到更具挑战性的案例表明，可以使用特殊模式来区分冰和水，稀疏矩形阵列也可用于结冰检测，并且结冰传感阵列还可进一步用于检测传感器自由侧的结冰情况，例如这对于飞机机翼的结冰传感是非常有用的应用。对各个案例的结冰检测图像进行重建，以研究利用超声导波层析成像技术进行结冰传感的可行性。结果表明，基于PRA的超声导波层析成像方法在所有三种情况下都成功检测并正确显示了结冰点。这证实了超声导波成像技术可能是板状结构中一种潜在有用的结冰传感工具这一事实。
