Figure 5
From: Low Cost Inkjet Printed Smart Bandage for Wireless Monitoring of Chronic Wounds
Capacitive sensor characterization.
(a) Sensor capacitance is measured for fixed volumes of sweat and blood (where sweat and blood are represented by equivalent properties fluids). The difference in capacitance change for blood and sweat is significant which shows that the senor will be able to detect blood even in the presence of sweat. The error bars show the variation in change of capacitance for different samples. (b) Sensor capacitance is also measured under the influence of external pressure on the bandage in the range of 5–100 mmHg. The maximum error in the measurements is around ±2.3%. (c) The change in Q is different for the cases of external pressure, bleeding and sweating. This difference allows the selective detection of the three stimuli.
