Device and method for detecting residual amount of reagent

Abstract

The invention provides a device and a method for detecting the remaining amount of a reagent. The method comprises the following steps of: charging and discharging a liquid-aspirating probe, and reading a voltage signal of the liquid-aspirating probe; judging whether the downward run-out amount of a current voltage signal value, compared with a base voltage value, is greater than a liquid level threshold value, if so, adding 1 to a first flag counter, otherwise, resetting the first flag counter; and judging whether a value of the first flag counter is greater than or equal to a first set value, and if so, outputting a contact liquid level indication signal. A method for scanning the remaining amount of the reagent comprises the following steps of: respectively adding 5-ml normal saline and 50-ml normal saline into reagent bottles; respectively measuring the heights of two reagent amounts by using the liquid-aspirating probe, and calculating the height of zero point of the bottom of the reagent bottle by using a mathematical method; and measuring the height of a liquid level to be measured in the reagent bottle to be measured by using the liquid-aspirating probe, and thus obtainingthe remaining amount of the liquid level. By the invention, detection accuracy is improved, and working reliability is improved.

Description

technical field [0001] The invention relates to a device and a method for detecting the remaining amount of liquid, in particular to a device and a method for detecting the remaining amount of a reagent in the medical field. Background technique [0002] Medical analysis instruments need to absorb reagents when analyzing body fluids, so it is necessary to determine whether the remaining amount of reagents meets the needs of the test before testing, which requires the detection of remaining reagents. First of all, the liquid level must be detected with a liquid suction probe, driven by the motor, the liquid suction probe goes down in the reagent bottle, when it touches the liquid level, in order to ensure the accuracy of the measurement, the motor must stop, so the instrument must For liquid level detection, when the needle tip touches the liquid level, it is necessary to output a contact liquid level signal to the motor control unit to control the motor to stop. The existin...

AI Technical Summary

Problems solved by technology

The disadvantage of this method of detecting zero point is that when the aspiration probe touches the bottom of the bottle, due to the spring pressure on the top of the aspiration probe and the friction between the aspiration probe and the shell, the aspiration probe will The optocoupler block on the top of the aspiration probe will not leave the optocoupler immediately, but after the needle arm of the aspiration probe is deformed, the optocoupler block will leave the optocoupler, and the stepping motor will take more steps. In this way, the calculated zero point will be slightly lower than the actual zero point, resulting in a high value for the remaining amount of scanning.

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