Handheld capacity calibration device of liquid transferring machine and calibration method thereof

Abstract

The invention discloses a handheld capacity calibration device of a liquid transferring machine and a calibration method thereof. By adopting a mechanical control module for driving an electric sliding platform to vertically move and driving an electric turntable to rotate, adopting a motor for driving a guiding rod to rotate and the like, a mechanical arm can carry out liquid acquirement operation, transferring operation and liquid draining operation on the liquid transferring machine, and through an electronic scale and an infrared temperature sensor, collection of liquid transferring data is achieved; the ascending and descending conditions of equipment are detected by an optoelectronic switch, the opening and closing states of a top cover of the electronic scale are controlled, and a program is written on an upper computer according to a verification regulation <JJG 646-2006> to achieve data processing. The handheld capacity calibration device mainly has the advantages that the mechanical arm restores a manual pressing operation, an infrared temperature measurement mode eliminates the influences caused by a temperature sensor on weighing, and the opening and closing design of the scale based on the optoelectronic detection deceases the influences of liquid vaporization during calibration. The device achieves automatic calibration of the liquid transferring machine, reducespersonal errors and environmental errors and meanwhile can conduct analysis on calibration data and give a calibration report.

Description

Technical field [0001] The present invention relates to the field of pipettes, and in particular to a handheld pipette volume calibration device and calibration method. The method and device mainly relate to the calibration of the relative error and volume repeatability of the pipette gun (under specified conditions, Use a reference standard to assign values ​​to the characteristics of measuring instruments, including reference materials, and determine the indication error). Background technique [0002] Pipettes are widely used in biochemical laboratories, environmental laboratories, food analysis laboratories, hospitals, health and epidemic prevention stations, blood transfusion stations, and are precision liquid sampling instruments that can quickly and accurately quantify a small amount of liquid samples and test solutions For sampling and adding samples, for adjustable pipettes, the operator can also adjust the volume value of the pipette according to actual needs. Pipettes...

AI Technical Summary

Problems solved by technology

Since each capacity verification point needs to be tested 6 times according to the national regulations, 18 liquid extraction and discharge operations are required to detect the 3 capacity values ​​of an adjustable pipette. It is difficult to manually press the pipette to ensure that each press The degree is in line with the metrological verification regulations

Therefore, the operation steps of this method are repetitive and complicated, and manual operation will bring certain errors. These defects are more obvious when calibrating batches of pipettes

[0004] In terms of hardware, the high-degree-of-freedom simulation manipulators produced by some foreign companies can realize the operation of pipettes to a certain extent. However, in the actual use of calibrating pipettes, too many degrees of freedom are not required. DOF is wasteful and prohibits its use in pipette calibration due to high cost

In terms of software, the pipette calibration system designed in China is also constantly improving, which can efficiently process and analyze a large amount of collected data. However, only the automation of data processing has been realized, and there is still a gap in the automation of pipette control.

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