With the assistance of mechanosensory lateral line system, fish can perceive minute water motions in complex underwater environments. Inspired by the constriction within canal nearby canal neuromast in fish lateral line system, we proposed a novel canal artificial lateral line (CALL) device with constriction in canal nearby the sensing element. The designed CALL device consisted of a poly(vinylidene fluoride-trifluoroethylene)/polyimide cantilever as the sensing element and a polydimethylsiloxane (PDMS) microfluid canal. Two types of CALL devices, i.e., CALL with straight canal (S-CALL) and CALL with constriction canal (C-CALL), were developed and characterized employing a dipole source. Experimental results showed that the proposed C-CALL device achieved a pressure gradient detection limit of 0.64 Pa m-1, which was much lower than the S-CALL device. It indicates that the constriction in the canal nearby the sensing element could enhance the hydrodynamic pressure sensing performance of the CALL device. In addition, the constriction could modify the frequency response of the CALL device, and the C-CALL device achieved higher voltage output than S-CALL in high-frequency domain.

中文翻译：

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收缩管辅助人工侧线系统，用于增强水动力压力感测。

借助机械感测侧向线系统，鱼可以在复杂的水下环境中感知微小的水运动。受鱼侧线系统中管旁神经管内狭窄的启发，我们提出了一种新型的人工管旁缩（CALL）装置，该装置在传感元件附近的管内有狭窄。设计的CALL装置由作为传感元件的聚偏二氟乙烯/三氟乙烯/聚酰亚胺悬臂和聚二甲基硅氧烷（PDMS）微流体管组成。开发了两种类型的CALL装置，即带直管的CALL（S-CALL）和带颈缩的CALL（C-CALL），并使用偶极子源进行了表征。实验结果表明，所提出的C-CALL装置达到了0.64 Pa m-1的压力梯度检测极限，远低于S-CALL设备。这表明在传感元件附近的导管中的收缩可增强CALL装置的流体压力传感性能。另外，该收缩可以改变CALL设备的频率响应，并且C-CALL设备在高频域中实现了比S-CALL更高的电压输出。