Portable glucometer

Abstract

The invention provides a portable blood glucose meter, which includes a single-chip microcomputer and a blood sugar testing circuit connected to the single-chip microcomputer, a temperature detection circuit, and a digital storage circuit; the blood sugar testing circuit includes an enzyme electrode, an operational amplifier, a resistance-capacitance parallel feedback loop, and an isolation resistor; The blood glucose test circuit collects the blood glucose concentration value and converts it into a current signal, converts the current signal into a voltage signal and amplifies the voltage signal, and the single-chip microcomputer processes the amplified voltage signal to generate a blood glucose value and stores it in the digital storage circuit, The temperature detection circuit is used to supplement the working temperature of the blood glucose testing circuit. The invention can quickly test the blood sugar concentration and ensure the measurement accuracy; meanwhile, it also has a storage function, which is helpful for users to check the historical value and change trend of the blood sugar concentration.

Description

technical field [0001] The invention relates to a portable blood glucose meter, which belongs to the technical field of medical equipment. Background technique [0002] The principle of the glucose oxidase electrode measurement method is: after the two ends of the enzyme electrode are placed in the blood, a redox reaction occurs, and the ferrous ions in the transmission medium lose electrons during the reaction process, and an oxidation reaction occurs. Next, a current is formed. By detecting the approximate linear relationship between the current change and the glucose concentration, after the current is measured, the analog electrical signal is converted into a data signal by the analog-to-digital converter, which is sent to the single-chip computer, and then the read data is processed and converted. The blood sugar content is converted into blood sugar content data, and the blood sugar content is displayed, so as to achieve the purpose of detecting the blood sugar concen...

AI Technical Summary

Problems solved by technology

However, the existing blood glucose meter has a complex structure, a large number of circuit components, high power consumption, and inaccurate measurement results; and because the characteristics of the enzyme are difficult to grasp, the temperature compensation effect is uneven, and it is not suitable for the temperature and environmental needs of various regions.

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