The flexible capacitive pressure sensors are one of the most essential and famous devices with vast applications in automobile, aerospace, marine, healthcare, wearables, consumer, and portable electronics. The fabrication of pressure sensors in a cleanroom is expensive and time-consuming; however, the sensitivity, linearity, and other performance factors of those pressure sensors are exceptional. Moreover, sometimes we require sensors that are not expensive and can be fabricated rapidly where the other performance factors do not need to be highly remarkable. In this modern era, household materials and DIY (Do-it-yourself) techniques are quite helpful, highly utilized. They are recommended to fabricate low-cost sensors and healthcare devices for personalized medicine and low-cost consumer electronics. Different flexible capacitive pressure sensors are presented and experimentally characterized for acoustic and air-pressure monitoring in this thesis. The design criteria of a cantilever-based capacitive pressure sensor are discussed. The three different designs are analysed with aspect ratios of 1.5, 1.0, and 0.67. The sensor with an aspect ratio of 0.67 shows maximum sensitivity (mechanical and electrical), better response time, and the 1st and 2nd mode of resonant frequencies is comparatively less than the other two. The cantilever designs are susceptible to slight pressure; therefore, the diaphragm-based normal mode capacitive pressure sensor is introduced in the second chapter, which defines the design criteria of diaphragm shapes. The five different diaphragms analysed are circular, elliptical, pentagon, square, and rectangular shapes. The circular capacitive pressure sensor shows maximum sensitivity, however, maximum non-linear response.....

中文翻译：

---

使用DIY技术和家居材料的柔性电容式压力传感器的设计标准

柔性电容式压力传感器是最重要和最著名的设备之一，在汽车、航空航天、船舶、医疗保健、可穿戴设备、消费类和便携式电子产品中有着广泛的应用。在洁净室中制造压力传感器既昂贵又耗时；然而，这些压力传感器的灵敏度、线性度和其他性能因素非常出色。此外，有时我们需要不昂贵且可以快速制造的传感器，而其他性能因素不需要非常出色。在这个现代时代，家居材料和 DIY（自己动手）技术非常有用，被高度利用。建议他们为个性化医疗和低成本消费电子产品制造低成本传感器和医疗保健设备。本文介绍了不同的柔性电容式压力传感器，并通过实验表征了声学和气压监测。讨论了基于悬臂的电容式压力传感器的设计标准。分析了三种不同的设计，纵横比分别为 1.5、1.0 和 0.67。纵横比为0.67的传感器显示出最大的灵敏度（机械和电气），响应时间更好，并且谐振频率的一阶和二阶模态相对于其他两个低。悬臂设计容易受到轻微压力；因此，第二章介绍了基于膜片的常模电容压力传感器，它定义了膜片形状的设计标准。分析的五种不同的隔膜是圆形、椭圆形、五边形、正方形和矩形。