Liquid drop detection circuit and method

Abstract

The invention belongs to the technical field of liquid drop detection and discloses a liquid drop detection circuit and method. By the adoption of the liquid drop detection circuit comprising an infrared transmitting module, an infrared receiving module, a decoding module and a processing module and the method thereof, the infrared transmitting module transmits infrared light, the infrared receiving module receives the infrared light passing through an infusion set and outputs an electric signal according to the infrared light, and the processing module samples the electric signal to acquire a sampling signal, compares the amplitude of the sampling signal with a preset amplitude, and outputs a first control signal to the decoding module when the amplitude of the sampling signal is lower than the preset amplitude; the decoding module outputs target information to a rear-end circuit according to the first control signal, or the decoding module adjusts the illumination intensity of the infrared transmitting module according to the first control signal so as to adjust the amplitude of the sampling signal till the amplitude is equal to the preset amplitude, and outputs the target information to the rear-end circuit. The problem of high false alarm rate of an existing liquid drop detection method is solved.

Description

technical field [0001] The invention belongs to the technical field of liquid drop detection, and in particular relates to a liquid drop detection circuit and method. Background technique [0002] At present, the existing droplet detection method is to identify the velocity of the droplet through the droplet identification circuit, and then send the identification result to the back-end circuit, so that the back-end circuit can perform corresponding recording or processing. However, when the material of the infusion set changes, the dripping pot of the infusion set condenses to form water droplets hanging on the wall, or the dripping pot of the infusion set is released from the mould, the water trap and printing are formed, etc., the existing droplet recognition circuit will issue The wrong recognition result is sent to the back-end circuit, which in turn causes the back-end circuit to alarm according to the wrong recognition result. When the medical staff receives the alar...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a liquid drop detection circuit and method, aiming to solve the problem of high false alarm rate in the existing liquid drop detection method

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