In medical applications, sensing forces along surgical tools is of high importance in order to avoid collateral damage of tissue and surrounding structures. However, the space available in their central lumen limits the routing of wired sensors that are widely available today, and thus their integration into such tools. In this paper, we present a new wireless force sensor based on wave backscattering that reflects electromagnetic waves with phase changes that are directly related to the applied force magnitude and location. The proposed sensor can sense force magnitudes with an average error of 0.01 N and a standard deviation of 0.49 N, and their application location with an average error of -0.33 mm and a standard deviation of 0.82 mm. The sensor also has the potential to be translated to applications beyond medical instruments, including applications involving a large number of sensors and situations where wire routing is challenging due to the environment in which they are used.

中文翻译：

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面向医疗应用的基于波反向散射的无线力传感器


在医疗应用中，为了避免组织和周围结构的附带损伤，感测手术工具上的力非常重要。然而，其中心管腔中的可用空间限制了当今广泛使用的有线传感器的布线，从而限制了它们与此类工具的集成。在本文中，我们提出了一种基于波反向散射的新型无线力传感器，该传感器反射具有与所施加的力大小和位置直接相关的相位变化的电磁波。该传感器可以感知平均误差为 0.01 N、标准偏差为 0.49 N 的力值，以及其应用位置的平均误差为 -0.33 mm、标准偏差为 0.82 mm。该传感器还有潜力应用于医疗仪器以外的应用，包括涉及大量传感器的应用以及由于使用环境而导致布线具有挑战性的情况。