ZYNQ-based portable human body impedance real-time imaging device capable of being worn during exercise

Abstract

The invention provides a ZYNQ-based portable human body impedance imaging device capable of being worn during exercise. Current excitation voltage measurement and a dynamic impedance imaging mode are adopted. The device comprises a wearable electrode array, an excitation source, a collection circuit, a multiplexer, a ZYNQ processor, a display screen and a rechargeable battery. Button electrodes are uniformly fixed to an elastic cord firmly to ensure that the distances between the electrodes are equal; the current excitation source is composed of a processor DDS IP core, a DAC and a V / I circuit to obtain controllable constant current source frequency; the collection circuit comprises a signal amplifier, a single-ended to differential device, a filter and an ADC to ensure a high signal to noise ratio; the multiplexer realizes selection of a working electrode; a ZYNQ is adopted as the processor, a programmable logic device of the ZYNQ realizes signal excitation, a DPSD mode is adopted for measurement to resist all kinds of pilot frequency noise including exercise muscle electrical noise, and image reconstruction and display are realized through on-chip linux or an Android operating system. The device has the advantages of being capable of being worn during exercise, small, free of damage, capable of realizing real-time imaging and convenient to use eventually.

Description

technical field [0001] The invention relates to a ZYNQ-based portable and wearable portable human body electrical impedance real-time imaging device, which can be used as a portable device to measure the breathing condition of the lungs when the human body is in motion, etc., and can also be used as a pillow-side respiratory monitor, belonging to medical imaging technology field. Background technique [0002] A portable medical imaging device that can monitor the human body in real time, not only requires the imaging device to have a sufficiently high imaging frequency, but also requires no damage to the human body after monitoring the human body for a long time, and also requires the device to be convenient for measurement, small in size, and does not require an additional guardian . From the perspective of patient health, most of the current medical imaging equipment is lossy imaging, which is not suitable for long-term monitoring; from a technical perspective, the curren...

AI Technical Summary

Problems solved by technology

First, it is the most difficult to realize all the functions of electrical impedance imaging acquisition, image reconstruction and real-time display with a small-volume, simple-structured processing system; The process has higher requirements on the speed of electrical impedance imaging; third, when a person breathes, the structure of the chest cavity of the human body will change, and different people also have different sizes of busts. Whether the electrode spacing of electrical impedance imaging is equal will affect the imaging The effect has a greater impact; so it is very important to design an electrode that can be equally spaced and firmly fixed on people with different busts

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