An adaptive liquid level detection sampling system and its control method
A liquid level detection and sampling system technology, which is applied in the direction of analyzing materials and instruments, can solve the problems of different ion solubility of cleaning liquid, affecting the capacitance value of sampling needle, affecting the accuracy of liquid level detection results, etc., to improve accuracy, Avoid the effect of hanging liquid
Active Publication Date: 2017-09-12
SUZHOU HYBIOME BIOMEDICAL ENG CO LTD
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However, due to the different formulas of the cleaning solution used to clean the sampling needle, the ion solubility of the cleaning solution will be different, which will affect the capacitance value of the sampling to the ground and affect the accuracy of the liquid level detection results
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[0047] In order to improve the efficiency of sampling and ensure the accuracy of liquid level detection, step 5 of the present invention also includes separating the height space above the sample or reagent container from top to bottom, and defining it as a fast running height and a slow running height, and at the same time Define the first running speed of the sampling needle and the second running speed of the sampling needle corresponding to the above-mentioned fast running height range and slow running height range;
[0048] In step 7, during the descent of the sampling needle, when the sampling needle is within the fast operating height range, control the sampling needle to move at the first operating speed, and when the sampling needle is within the slow operating height range, control the sampling needle to move at the second operating speed Speed moves.
[0049]The present invention realizes the self-adaptation of sampling to the current cleaning solution solubility ...
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The present invention discloses an adaptive liquid level detection sampling system which includes an upper computer, a controller, a sampling needle, a sampling needle cleaning mechanism, a sampling needle transmission mechanism and a sampling needle earth capacitance detection unit; the controller controls the sampling needle transmission mechanism to run according to a received sampling needle cleaning command so as to drive the sampling needle to enter the sampling needle cleaning mechanism for cleaning and drive the sampling needle to reset after the cleaning is completed; then the controller controls the sampling needle transmission mechanism to drive the sampling needle for sampling; and the sampling needle earth capacitance detection unit detects earth capacitances of the sampling needle after the cleaning is completed and during the sampling process and outputs the earth capacitances to the controller. Through capacitance calibration, the sampling needle is adapted to a current cleaning fluid solubility value, and then liquid level detection is performed, so that influence on sampling needle earth capacitances due to different cleaning fluid ion solubility can be avoided, and influence on liquid level detection results can be avoided.
Description
technical field [0001] The invention relates to the technical field of medical equipment and its control, in particular to an adaptive liquid level detection and sampling system and method suitable for chemiluminescence measuring instruments. Background technique [0002] The liquid level detection system is an important part of the automatic chemiluminescence immunoassay measurement and control system. It is used to control the depth of the sampling needle into the liquid, so as to minimize the dripping of the sampling needle and make the automatic sampling process stable and reliable. [0003] Capacitive liquid level detection technology is simple in principle, low in cost and easy to implement, and is currently the most widely used liquid level detection technology on the market. For details, please refer to the article "Intelligent Liquid Level Detection Technology Based on Capacitance Detection" published in "China Medical Equipment" 2013, Volume 28, Issue 11, written b...
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IPC IPC(8): G01N35/10
CPCG01N35/1009G01N2035/1025
Inventor 沙利烽胥法伟吴冬郭金龙苗新利
Owner SUZHOU HYBIOME BIOMEDICAL ENG CO LTD