【摘要】 利用光纤传输以及液面全内反射方式,并采用光源脉冲调制和锁相环信号检测技术,研制了一种光纤型液位自动报警装置,已经用于输液器输液终了时的远距离自动报警。该装置抗干扰能力强、安全可靠、成本低且易于网络化,并可以用于其它种类液位的非接触远距离监测。更多还原

【Abstract】 We have fabricated an automatic alarm device for medical transfusion.This device is mainly composed of pulse-modulated light source,plastic optical fiber,photo diode,and alarm circuit.The alarm signal is immune from the unwanted light interference due to the application of pulse modulation.The use of plastic optical fiber allows us to carry out the remote and non-contact monitoring to the medical transfusion.In addition,this device is simple,practical,inexpensive,and easy to install.The feasibility of this automatic alarm device has been demonstrated by experiment.更多还原