Biological impedance measurement probe based on four-electrode model

Abstract

The invention relates to the field of biological impedance measurement, particularly to a biological impedance measurement probe based on a four-electrode model. The biological impedance measurement probe comprises a substrate, microstrip lines and an electrode array. The microstrip lines are welded on the substrate. The electrode array is connected with the microstrip lines and composed of a pair of symmetrical spring electrodes and a pair of symmetrical printed electrodes. The spring electrodes and the printed electrodes are arranged at intervals. The electrodes are connected with terminals, arranged on the substrate, through the microstrip lines. By the biological impedance measurement probe, distinctions of contact areas caused by the uneven surface of a to-be-measured object are weakened, contact impedance errors are reduced, measurement accuracy of the to-be-measured object is guaranteed on the premise that the additional measurement errors are not introduced, and character judgment for the to-be-measured object is facilitated according to data from the measurement.

Description

technical field [0001] The invention relates to the field of bio-impedance measurement, in particular to a bio-impedance measurement probe based on a four-electrode model. Background technique [0002] In bio-impedance measurement, the electrical impedance tester usually uses a four-electrode model probe, which is located at the forefront of the measurement system and directly contacts the biological tissue or human body to be measured. Among them, events that occur on the probe, including useful information, noise, artifacts, contact impedance, polarization voltage, etc., will enter the subsequent circuit to be amplified, transmitted, and participate in signal processing. The general connection mode of the electrode array of the probe of the existing four-electrode model is all pogo pin connections or all hard connections. In actual operation, the probe electrode arrays are all connected by pogo pins. Although the contact area between the excitation electrode and the colle...

AI Technical Summary

Problems solved by technology

Although some technical solutions for devices with fixed electrodes have been proposed in the prior art, there are generally problems that can not solve the problem of good contact with the measured object without introducing new measurement errors, resulting in the inability to accurately measure the measured object. It is impossible to judge the traits of the tested object based on the measured data

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