The use of photoelectric non-contact detection of the dynamics of the drops, triggering the circuit to work, that is to say, at the bottom of the bottle or dropper buffer bottles with photoelectric devices, the absence of liquid will produce an electrical signal.
Some inventions apply the principle of gravity: no matter what kind of liquid, the weight of the bags and bottles left after the final liquid hit should be under a certain weight, for example, 50g (one or two), so as long as you find a load cell with a resolution of 50g or less, and then supplemented with a control circuit, you can report the alarm more accurately.
The latest invention of the infusion alarm for the infusion of water droplets in the drop hopper constantly moving to monitor, to achieve the purpose of real-time alarm, to solve the high false alarm rate, the shortcomings of the reliability is not strong .
Expanded Information
1, simple and compact structure, small and convenient, simple circuitry and low cost.
2, can remind the medical staff in time to the patient for medical treatment and improve the efficiency of medical staff.
3, the device itself is equipped with line detection function to ensure that the equipment can work properly to achieve the purpose of timely notification of medical personnel.
4, clamped on the infusion tube, no pollution of drugs.
5, practicality, can be used many times and does not affect the accuracy.
6, when the infusion is finished, the buzzer will send out a warning sound, in order to send a signal to the medical staff that the infusion is finished.
Baidu Encyclopedia - Infusion Alarm