首页>
外国专利>
AUTOMATED DIAGNOSIS-ASSISTING MEDICAL DEVICES UTILIZING RATE/FREQUENCY ESTIMATION AND PATTERN LOCALIZATION OF QUASI-PERIODIC SIGNALS
AUTOMATED DIAGNOSIS-ASSISTING MEDICAL DEVICES UTILIZING RATE/FREQUENCY ESTIMATION AND PATTERN LOCALIZATION OF QUASI-PERIODIC SIGNALS
展开▼
机译:利用准周期信号的速率/频率估计和模式定位自动诊断医疗设备
展开▼
页面导航
摘要
著录项
相似文献
摘要
A system includes an electronic stethoscope producing a quasi-periodic signal, a processor, and a memory device with stored instructions that, when executed by the processor, cause the system to receive a representation of the quasi-periodic signal, to remove a DC component from the received representation of the quasi-periodic signal to produce a purely time-varying signal, and to filter, the time-varying signal to produce a pre-processed signal. A portion of the pre-processed signal is auto-correlated with itself, and a corresponding auto-correlation output is stored. A biphasic tapering function is applied to the auto-correlation output and produces a first maximum, the function including a time constant parameter that is a function of the quasi-periodic signal. A representation is stored, based on the first maximum, as an indication of a rate or frequency of the quasi-periodic signal.
展开▼