title: A microcomputer-based data acquisition system for ECG, body and ambient temperatures measurement during bathing.
abstract: A data acquisition system employing a low power 8 bit microcomputer has been developed for heart rate variability monitoring before, during and after bathing. The system consists of three integral chest electrodes, two temperature sensors, an instrumentation amplifier, a low power 8-bit single chip microcomputer (SMC) and a 4 MB compact flash memory (CFM). The ECG from the electrodes is converted to an 8-bit digital format at a 1 ms rate by an A/D converter in the SMC. Both signals from the body and ambient temperature sensors are converted to an 8-bit digital format every 1 second. These data are stored by the CFM. The system is powered by a rechargeable 3.6 V lithium battery. The 4 x 11 x 1 cm system is encapsulated in epoxy and silicone, yielding a total volume of 44 cc. The weight is 100 g.
authors.affiliation: Dept. of Electronics Engineering, Hiroshima Institute of Technology, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Uokawa
authors.forename: Y
authors.initials: Y
authors.lastname: Yonezawa
authors.forename: W M
authors.initials: WM
authors.lastname: Caldwell
authors.forename: A W
authors.initials: AW
authors.lastname: Hahn
mesh_terms: D000328:Adult; D001494:Baths; D001831:Body Temperature; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008297:Male; D008838:Microcomputers; D012815:Signal Processing, Computer-Assisted; D013696:Temperature