High-precision automatic testing method and device for volume metering tube
A technology of automated testing and volumetric measurement, which is applied to volumetric measuring instruments/methods, measuring devices, and measuring capacity. It can solve problems such as damaged glass products, reduced data reliability, and inability to accurately reflect the size of volumetric measuring tubes. It achieves The effect of high-efficiency measurements
Inactive Publication Date: 2007-09-19
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology
The method of directly measuring the length with a vernier caliper has three disadvantages: first, the wall of the volumetric tube is uneven, and the inner diameter of the test can only be an average value, which cannot accurately reflect the size of the volumetric tube itself; The volume is slightly upgraded, and the inner diameter is only a few millimeters, and because the pipe wall is a curved surface, it increases the difficulty of the vernier caliper test operation and reduces the accuracy of the test results; finally, because the vernier caliper is used by humans, different testers test the same volume measurement Tubes will produce different results, less confidence in the data, and there is a possibility of damage to the glasswork
[0005] It can be seen that how to combine the existing technology of measuring the volume of the container with the help of the precise metering chamber to replace the manual measurement process of the volume of the existing volume metering tube to improve the measurement accuracy and measurement efficiency has not been well resolved.
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[0037] Below in conjunction with the best embodiment shown in the accompanying drawings, it will be further described in detail.
[0038] The high-precision automatic test method for the volume of the volume measuring tube of the present invention is to drive the lead screw through the stepping motor, and the lead screw pushes the syringe piston to absorb or push out the liquid. Because every half step of the stepper motor moves, the stroke of the lead screw is a fixed value, and the syringe is a standard cylinder with a fixed cross-sectional area, so the liquid sucked or pushed out by the syringe through the stepper motor movement can be calculated Standard value, the accuracy reaches 0.001μL. Let the liquid pushed out from the syringe be filled into the measured volumetric tube, and the volume of the volumetric tube within a certain length can be obtained by calculating the volume of the pushed out liquid, and the accuracy of the test value can reach 0.01 μL. The currently ...
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A method for testing volume of volume metering tube accurately includes sending liquid for testing from storing container to reference source by control module then it to sending volume metering tube to be tested by reference source, sending redundant liquid for testing to volume metering tube to be tested continuously till liquid ending position detector is acted firstly, sending said liquid from said tube to reference source and starting up calculation when said detector is acted again as well as ending calculation till liquid initial position detector is acted.
Description
technical field [0001] The present invention relates to a test method and equipment for the calibration capacity of fluid, in particular to a test method and device for the volume of a volumetric tube, in particular to a method and a device for measuring the volume of a volumetric tube by means of an accurate metering chamber. Background technique [0002] The volumetric measuring tube is mainly used to measure the volume of liquid and is a kind of measuring device. The measurement accuracy of the volumetric tube itself directly affects the overall performance of products using volumetric tubes in the production / application process, such as medical blood cell analyzers. The measurement accuracy of the volume metering tube itself is an important indicator. If the volume of the volumetric metering tube itself is uncertain, it will have a negative impact on the performance of the entire product. [0003] In the previous tests on volumetric tubes, the internal diameter of the v...
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IPC IPC(8): G01F17/00
Inventor 张舜王满强
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD