Design of Piezoelectric Vibration Sensor for Oil Pipeline Health Monitoring

Pipeline transportation is widely used in the transportation of oil and gas and other resources. The safety of oil pipeline is related to the safety of national strategic resources. Therefore, it is necessary to monitor the operation state of oil pipeline. In this paper, the design of piezoelectric vibration sensor is completed from the aspects of sensitive element design, structure design and signal conditioning circuit design. Among them, in the sensitive element design part, the compression structure is used; In the structural design part, the appropriate mechanical structure and fixed structure are also selected for the structural design of the sensor. In the part of signal conditioning circuit, it is designed from the aspects of charge conversion circuit, conditioning amplification circuit, filter circuit, output amplification circuit and regulated power supply. Finally, an experimental system is built to test the linearity, sensitivity and repeatability error of the designed piezoelectric vibration sensor.