TITLE:
Development of a four-channel cardiovascular signals collector based on STM32 with digital-controlled gain
AUTHORS:
Longcong Chen, Ruiying Zhang, Gaiqin Liu, Bin Gao, Guohu Hu
KEYWORDS:
Cardiovascular Signal; Signal Collector; Digi-tal-Controlled; STM32F103RB; PGA113
JOURNAL NAME:
Journal of Biomedical Science and Engineering,
Vol.6 No.4,
April
29,
2013
ABSTRACT: To
get better methods on diagnosis of cardiovascular diseases
and health assessment by comparison analysis of four kinds of
cardiovascular signals, which are blood pressure signal (BPS), plus wave signal
(PWS), electrocardiosignal (ECS) and cardiac sound signal (CSS), a four-channel
signals collector is introduced in this article. This collector is composed
of microcomputer STM32F103RB with integrated 12-bit analog to digital
converters (ADCs) and some integrated chips (IC) such as PGA113, a programmable
gain amplifier with internal calibration channels for system-level calibration.
Therefore, the data of four kinds of cardiovascular signals can be both collected
by this signal collector with a high precision and output to a computer by
universal serial bus (USB) interface, which can also offers power for this instrument.
In addition, the gain of input signal can be changed by computer software
through USB interface under microchip commands. Thus it has many merits, such
as the small volume, low cost, high performance and precision,
digital-controlled gain and so on. Consequently, it is convenient to acquire
the data of four kinds of cardiovascular signals by it, and a waveform of one
sample is shown.