输液泵气泡检测方法研究

Research on the bubble detection method of infusion pump

研究超声波检测智能输液泵管路中气泡的方法。利用超声波穿越两种不同介质的界面时,会发生反射、折射、透射等物理现象,因水和空气之间的声阻抗差别较大,超声波穿透水与空气的分界面时会发生较大程度的反射和折射,利用这一物理现象,通过监测超声波的能量(输出电压),即可得到输液管内是否存在气泡以及气泡存在的程度。通过测定超声波的穿透能量,可以检测输液管路内的气泡。用超声波能准确地检测出输液管路中的气泡,是目前输液泵检测气泡的主要方法。

To discuss the ultrasonic testing intelligent infusion pump tubing bubble method. When the ultrasonic wave goes through the interface of two different media, the reflection occurs, refraction, transmission and other physical phenomena can occur because of a large extent acoustic impedance difference between water and air, which can be used in this physical phenomenon, by monitoring the ultrasonic energy （output voltage） can be obtained if the extent of the presence of bubbles and bubble exists within the infusion tube. By measuring the penetration of ultrasonic energy, we detected air bubbles within the infusion line. Ultrasound can accurately detect air bubbles in the infusion line, which is the main method of detecting air bubbles for infusion pump.