Intravenous infusion is the most important infusion method in clinical treatment in China. In practice, medical personnel generally rely on experience and observation to manually adjust the drip rate by rotating the pulley on the infusion set. The system is a non-contact automatic automatic drip detection and alarm control device, which detects the dripping speed of the liquid at all times, and can automatically cut off the liquid for local and remote alarm after the liquid droplet is finished, to notify the medical staff to replace it in time. Liquids are very important for improving the efficiency and quality of modern medical service systems. 1 Research significance At present, the hospital intravenous infusion is mainly artificially controlled, and the intravenous infusion monitored by humans cannot correctly mediate the flow rate of the drug solution. The speed is too fast. Because of the potassium component in the drip, vascular stimulation is caused, and the stimulation usually shows pain. But usually the speed of infusion depends on your own physical condition, but the infusion will still stimulate the blood vessels and heart and kidneys. Using the existing technology to design an intelligent infusion system, it is possible to control the flow rate of the drug solution, detect the remaining amount of the drug solution, and stop the infusion to prevent blood return in time. The medical staff can observe and mediate the flow rate of all the drug liquid through the main control room, thereby greatly save human effort. This design studies an intelligent liquid drip speed controller with convenient operation, intuitive display and alarm function. This system allows the nursing staff to monitor the progress time of the patient's drip, and avoid the patient's "blood return" during the infusion process. The medical accidents improve the safety factor of the patient during the treatment of infusion, while reducing the workload of the nursing staff and giving the nursing staff a more comfortable working environment. 2 system overall design This system uses ATMEGA16 as the main control chip to control the droplet velocity, alarm information and the movement direction of the liquid rack. The infusion set can set the drip speed arbitrarily through the remote controller, and can receive the information set by the remote controller and can perform abnormal conditions. Call the police. The system hardware block diagram is shown in Figure 1. The lower position system adopts modular design ideas, including liquid level detection and alarm system, drip speed system (including drip speed control device, steel ball and other actuators), single chip processing system, communication module, custom remote control module, display and alarm. Module, angle sensing module and other parts. The liquid level detecting module is mainly used for alarming the liquid level, the actuator performs the drip speed control under the control of the program; the communication module is used for communication with the host. Figure 1 hardware block diagram 2.1 droplet detection program The drop rate test uses an infrared detection technique to measure the infusion rate above the Muffin's dropper. The structure diagram of the drip rate detecting device is shown in Figure 2. After the infrared emitter emits infrared light, the light penetrates the Muffin's dropper and is irradiated onto the phototransistor. The phototransistor turns the light that is irradiated onto it into a current signal for output. If there is no droplet drop in the Moffett dropper at this time, the attenuation of the light is relatively small, and the current on the triode is relatively large; if there is a drop in the Moffin dropper at this time, the droplet is blocked. In the case of light, the droplets absorb and scatter light, causing the phototransistor to receive a relatively weak optical signal. The current signal outputted by the phototransistor is converted into a voltage signal, and the presence or absence of the drop of the liquid droplet can be detected by detecting the strength of the voltage signal at the output end. After the detected signal is shaped and sent to the MCU for processing, the drip rate of the infusion can be calculated. Figure 2 Drop speed detection device structure Heated Tobacco Products,Heated Tobacco Vs Vaping,Heated Tobacco Device,Heated Tobacco Vs Cigarettes KOKEN Co., Ltd , https://www.hnb-maker.com