Drop alarm device capable of detecting drop speed in real time and detecting drop for completion
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A drop alarm device capable of detecting the drop speed in real time and detecting the drop for completion, which comprises a fixing device and an auto alarm control circuit mounted on the fixing device and used for detecting the drop speed and detecting the drop for completion. The fixing device adopts a cuboid structure with a square cross section, and a fixing structure for mounting a drop kettle is formed inside the fixing device, a power switch, a loudspeaker, a nixie tube and a power supply indicator are arranged outside the right end of the fixing device, and an infrared photodiode and a microcontroller chip are arranged at the right end; and a function selecting switch, a parameter increasing switch and a parameter decreasing switch are arranged outside the left end of the fixing device, and another infrared photodiode, a parallel sleeve and a power supply are arranged at the left end. By utilizing the refraction principle of parallel infrared light, the signal of whether drops exist or not is converted into a corresponding pulse signal, the included angle of the transmitting direction and the vertical direction of the infrared photodiode is usually set between 20 degrees and 45 degrees, and the parallel sleeve is nested at the head of the infrared photodiode to parallelize the infrared light sent by the infrared photodiode. The utility model has simple structure, small volume, low manufacturing cost safe and reliable use, and can be widely used for intravenous infusion of hospitals or home environment.