可监测动脉血压波形的超声阵列柔性传感器

Ultrasonic array flexible sensor for monitoring arterial blood pressure waveform

为了解决传统超声传感器硬度大而不易与皮肤贴合的缺陷,设计开发了一款可监测动脉血压波形的超声阵列柔性传感器。通过将“S”形可拉伸铜箔电极转印到Eco-flex基底上,然后在铜箔电极上焊接1-3压电复合材料,最后用Eco-flex封装,制备出一款柔性可拉伸的超声阵列传感器,同时研究了超声阵列柔性传感器的稳定性、重复性、轴向分辨率以及可拉伸性能。结果表明:超声阵列柔性传感器的轴向分辨率能够达到330μm,电极的断裂伸长率可达76.56%,在经历拉伸、扭曲和弯折后仍能够恢复初始状态,能够对人体动脉血压波形持续监测,血压监测结果与商用血压计相比误差在2 mm Hg以内。

In order to solve the defects of traditional ultrasonic sensors,which are rigid and not easy to skin adhesion,an ultrasonic array flexible sensor is designed and developed.By transferring the“S”shaped stretchy copper foil electrode to the Eco-flex substrate,and then welding 1-3 piezoelectric composite material on the copper foil electrode,and finally packaging with Eco-flex,a flexible stretchy ultrasonic array sensor is prepared.The stability,repeatability,axial resolution and stretchinability of ultrasonic array flexible sensor are studied.The results show that the axial resolution of the ultrasonic array flexible sensor can reach 330μm,and the elongation at break of the electrode can reach 76.56%,which can still recover the initial state after stretching,twisting and bending.It can continuously monitor human arterial blood pressure waveform,and the error of blood pressure monitoring results is less than 2 mm Hg compared with that of commercial blood pressure monitors.