Portable bio-electrical impedance measurement device

Abstract

A portable bio-electrical impedance measurement device comprises a master control module, an excitation module, an impedance measurement module, a liquid crystal display module, an electrode disengagement detection module and an electric quantity detection module. The excitation module, the impedance measurement module, the liquid crystal display module, the electrode disengagement detection module and the electric quantity detection module are electrically connected with the master control module. The master control module gives an instruction to enable the excitation module to generate a constant excitation current, and injects the constant excitation current into a target through a pair of excitation electrodes making contact with the target to be measured. Meanwhile, the impedance measurement module collects a voltage signal of the target through a pair of measurement electrodes making contact with the target to be measured. After the voltage signal is processed, the impedance measurement module sends the voltage signal to the master control module to calculate a corresponding impedance value. The portable bio-electrical impedance measurement device is flexible in use, simple in structure, low in power consumption and convenient for a user to carry and use when the user goes out.

Description

technical field [0001] The invention relates to the technical field of bioelectrical impedance measurement, in particular to a portable bioelectrical impedance measurement device. Background technique [0002] Cells in organisms are surrounded by cell membranes, filled with cytoplasm, and extracellular fluid between cells. Physiological studies have shown that when DC or low-frequency current is applied to biological tissue, the current will bypass the cell in any possible way and mainly flow through the extracellular fluid: when the frequency of current applied to biological tissue increases, the capacitive reactance of the cell membrane capacitance Reduced, a part of the current will pass through the cell membrane and flow through the intracellular fluid, which makes the impedance of the biological tissue present a certain frequency dispersion characteristic to the outside world. [0003] Bioelectrical impedance technology, also known as medical electrical impedance or i...

AI Technical Summary

Problems solved by technology

In this traditional bioelectrical impedance measurement circuit, it is necessary to use chips with high power consumption such as FPGA and high-speed ADC; High power consumption; in addition, when performing data analysis and processing, it needs to be connected to a computer to display and store impedance information, which is large in size and power consumption, and is not easy to carry and use. Devices and methods cannot be popularized outside the hospital

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