Non-invasive estimation of the depth profile of soil strength with acoustic-to-seismic coupling measurement in the presence of crops
Non-invasive estimation of the depth profile of soil strength with acoustic-to-seismic coupling measurement in the presence of crops
复制标题
在农作物存在的情况下通过声震耦合测量对土壤强度深度剖面进行非侵入性估计
DOI：
10.1111/ejss.12462
复制
发表时间：
2017
影响因子：
4.2
通讯作者：
Shin H
中科院分区：
文献类型：
--
作者：
Shin H
传统的渗透阻力计测量土壤强度，渗透阻力是土壤机械性能的有用指标，是侵入性的和手工费力的。另一种非侵入性技术使用声源、两个麦克风和激光多普勒测振仪来获得声震（A-S）传递函数。通过数值优化，将声致土壤振动和声信号之间的传递函数与层状多孔弹性介质波传播模型的预测进行了比较。数值优化的剪切模量的土壤被转换为土壤强度等效的贯入阻力，通过应用的经验关系的类型的土壤问题。在种植冬小麦的试验田上进行了A-S和旋光仪测量。A-S推导的土壤强度的深度剖面与五个耕地浅层的土壤强度计读数的深度剖面合理一致。我们已经证明，在种植作物的情况下，可以通过这种非侵入性方法测量土壤强度。亮点使用声震仪测量土壤强度是侵入性的，而且很费力。声震耦合（A-S）已经应用于种植作物的土壤。从A-S数据中数值优化的剪切模量可以转换为穿透阻力。非侵入性A-S方法可以用作声震仪的替代品。
A traditional penetrometer measurement of soil strength in terms of penetration resistance, a useful indicator of a soil's mechanical property, is invasive and manually laborious. An alternative non‐invasive technique uses an acoustic source, two microphones and a laser Doppler vibrometer to obtain acoustic‐to‐seismic (A–S) transfer functions. Transfer functions between the acoustically‐induced soil vibration and the acoustic signals have been compared, through numerical optimizations, with predictions of a wave‐propagation model for layered poro‐elastic media. The numerically optimized shear modulus of soil was converted to the soil strength equivalent of penetration resistance by applying an empirical relation for the type of soil in question. The A–S and penetrometer measurements were made in experimental fields planted with winter wheat. The depth profiles of A–S‐deduced soil strength agree reasonably with those of penetrometer readings in shallow layers of five arable plots. We have demonstrated that the strength of soil in the presence of growing crops can be measured by this non‐invasive approach.HighlightsMeasurement of soil strength with a penetrometer is invasive and laborious.Acoustic‐to‐seismic (A–S) coupling has been applied to soil planted with crops.Numerically optimized shear modulus from A–S data can be converted to penetration resistance.Non‐invasive A–S method can be used as an alternative to a penetrometer.