Piezoelectric sensors whose sensing performances can be flexibly regulated hold significant promise for efficient signal-acquisition applications in the healthcare field. The existing methods for regulating the properties of polyvinylidene fluoride (PVDF) films mainly include material modification and structural design. Compared to material modification, which has a long test period and an unstable preparation process, structural design is a more efficient method. The irigami structure combined with compressive buckling can endow the flexible film with rich macrostructural features. Here, a method is fabricated to modulate the sensing performance by employing distinct 3D structures and encapsulation materials with varying Young’s moduli. The relationship among the aspect ratio (α), pattern factor (η), elastic modulus of encapsulation materials, and equivalent stiffness is obtained by finite element simulation, which provides theoretical guidance for the design of the 2D precursor and the selection of encapsulation materials. In the demonstration applications, the sensor accurately captures pulse waveforms in multiple parts of the human body and is employed for the pressure monitoring of different parts of the sole under various posture states. This method of structure design is efficient, and the preparation process is convenient, providing a strategy for the performance control of piezoelectric pressure sensors.

传感性能可灵活调节的压电传感器为医疗保健领域的高效信号采集应用带来了巨大的希望。现有调节聚偏氟乙烯（PVDF）薄膜性能的方法主要包括材料改性和结构设计。相比材料改性试验周期长、制备过程不稳定的问题，结构设计是一种更有效的方法。折纸结构与压缩屈曲相结合可以赋予柔性薄膜丰富的宏观结构特征。这里，我们提出了一种通过采用不同的 3D 结构和具有不同杨氏模量的封装材料来调制传感性能的方法。通过有限元模拟得到了长宽比（α）、图案因子（η）、封装材料弹性模量和等效刚度之间的关系，为二维前驱体的设计和封装材料的选择提供了理论指导。在演示应用中，传感器准确捕捉人体多个部位的脉搏波形，用于不同姿势状态下足底不同部位的压力监测。该结构设计方法高效、制备工艺简便，为压电压力传感器的性能控制提供了一种策略。