Liquid taking control method and device, and liquid taking system

Abstract

The invention relates to a liquid taking control method, which comprises the steps of: recording an actual pulse value Px given to a driving device when a reagent needle detects a liquid level; comparing the actual pulse value Px with a desired pulse value Pe, and controlling the reagent needle to suck rated quantity of reagent if a difference value between the Px and the Pe is within a set rangeT; otherwise, controlling the reagent needle to suck the rated quantity of reagent after re-detecting the liquid level for a preset number of times. The liquid taking control method can effectively ensure the contact of the reagent needle and the liquid, thus the probability of empty suction caused by empty detection is greatly reduced, thereby further ensuring that the reagent needle sucks sufficient reagent and improving the reliability of test or experimental results. The invention further discloses a liquid taking control device capable of implementing the liquid taking control method, anda liquid taking system adopting the liquid taking control method.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a liquid-taking control method, a liquid-taking control device and a liquid-taking system used in the detection process of a medical or chemical liquid level. Background technique [0002] The liquid extraction process is applied in various fields, such as in the configuration process of various reagents in the chemical industry, various experiments in the medical field, and in the production process of pharmaceuticals, etc. Taking the medical field as an example, in the process of drug experiment, the reagent arm of the inspection instrument (the reagent arm is driven by the driving device) will detect and draw a certain amount of reagent from the reagent bottle at a specific time, and then add the drawn reagent to the cuvette. Reagents, during this process, fast and accurate detection of the liquid level in the reagent bottle is the key to subsequent suction of sufficient rea...

AI Technical Summary

Problems solved by technology

[0003] At present, the reagent needle is equipped with a liquid level detection device that can change the feedback signal when it touches the liquid level. Whether the reagent needle touches the reagent liquid level is only judged by the jump of the feedback signal. Misjudgment is prone to occur, such as changes in the outside air humidity, the rationality of the detection threshold set by the hardware, and the deviation of the hardware manufacturing process, etc., which may cause a jump in the feedback signal, which will cause the reagent needle to change when it is not in contact with the reagent solution. When it reaches the liquid surface, the detection instrument thinks that it has touched the liquid surface. This phenomenon can be vividly called "air detection". Air detection will lead to the inability to absorb a sufficient amount of reagents in the subsequent process, and eventually lead to wrong experimental results.

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