PVDF压电薄膜传感器在便携式宫缩监测仪器中的应用

Application of PVDF Piezoelectric Film Sensor in Uterine Contraction Pressure Monitoring

摘要: 针对于传统压力传感器在宫缩监测中普遍存在的测量精度低、舒适度差等问题，在分析PVDF薄膜压电效应基础上，探讨了用于便携式宫缩压力监测仪器的PVDF压电薄膜传感器制作工艺，设计了宫缩压力信号放大和滤波预处理电路。在医院临床对PVDF压电薄膜传感器进行性能测试，结果表明：此传感器能够精准地感测到孕妇的子宫收缩变化，降低对孕妇正常活动造成的影响，符合当前医疗设备向便携化、移动化、可穿戴发展的趋势。

Abstract: For the low accuracy and poor comfort of traditional pressure sensors in uterine contraction pressure monitoring, a PVDF piezoelectric thin film sensor was fabricated. In this paper, PVDF film piezoelectric effect, fabrication process of sensors and design of signal preprocess were discussed. The performance testing in hospital for this sensor was made and the experimental results showed that this sensor can detect uterine contraction pressure accurately and reduce the impact on the normal activities of pregnant women, complying with the trend that current medical instrumenta-tion is becoming portable, mobile and wearable.