Method for improving detection near-space precision

A near-air and high-precision technology, used in hypodermic injection devices, optical device exploration, etc., can solve the problems of low detection accuracy and high cost, and achieve the effect of solving the problem of detection errors, reducing product costs, and flexibly controlling
CN101644785AActive Publication Date: 2010-02-10BEIJING AEONMED
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
BEIJING AEONMED
Publication Date
2010-02-10

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Abstract

The invention provides a method for improving detection near-space precision. The method comprises the following steps: under a calibration mode, recording a first calibration propelling quantity NE1 when a light blocking sheet on a moving component of an injector blocks a photoelectric switch on an injection pump, and recording an empty propelling quantity NE2 when a piston of the injector movesto the end; calculating a calibration relative quantity difference delta NE between the first calibration propelling quantity NE1 and a near-space relative quantity NE0 according to the preset near-space relative quantity NE0 of the injector, the first calibration propelling quantity NE1 and the empty propelling quantity NE2; and under a normal injection mode, recording a first propelling quantity E1 when the light blocking sheet blocks the photoelectric switch, using the difference of a real-time second propelling quantity E2 recorded when the piston of the injector moves and the first propelling quantity E1 as a working relative quantity difference E3 to be compared with the calibration relative quantity difference delta NE, and judging that the injector is propelled to a near-space state when the working relative quantity difference E3 is greater than the calibration relative quantity difference delta NE.
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Description

technical field

[0001] The invention relates to a detection system, and more particularly, to a method for improving the accuracy of near-space detection. Background technique

[0002] At present, the performance of syringe pumps for medical devices has a near-air alarm function. The commonly used near-empty detection mechanism mainly uses the potentiometer to sample the voltage value in real time and the switching value of the photoelectric switch to judge whether it is near-empty. For this solution of the potentiometer, the detection accuracy is high, but the cost is relatively high. But for the photoelectric switch, the detection accuracy is not high for the traditional method. Wherein, near-empty refers to a state in which the liquid in the syringe is nearly empty during a normal injection process. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for improving the accuracy of near-space detection, ...

Claims

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