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Filter device

A filter device and filter coefficient technology, applied in medical science, sensors, pulse rate/heart rate measurement, etc., can solve problems such as increased burden and longer time, and achieve the effect of reducing processing burden and improving filtering performance

Active Publication Date: 2015-05-27
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize the above-mentioned processing, for example, it is necessary to implement many determination processes by software, and it is undeniable that this increases the processing load and the time required for the processing becomes longer.

Method used

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Experimental program
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no. 1 Embodiment approach

[0042] (Overall structure example)

[0043] figure 1 It is a diagram showing the configuration of an example of a pulsation detection device including a filter device. figure 1 The shown pulsation detection device 100 is a type of sensor device that detects a pulsation signal caused by the pulsation of a subject (including humans and animals).

[0044] Here, the so-called pulsation refers to the movement produced when the internal organs (not just the heart) repeat the usual periodic contraction and relaxation in medicine. Here, the movement of the pump in which the heart periodically pumps blood is referred to as pulsation. In addition, the heart rate refers to the number of beats per minute of the heart. The pulse rate refers to the number of pulses in the peripheral blood vessels. When the heart pumps blood, pulses are generated in the arteries, so the value obtained by counting the number of times is called the pulse rate or pulse for short. Only when the pulse is mea...

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PUM

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Abstract

A filter device includes a filter that separates a steady component and a non-steady component included in an input signal, a synthesis unit that synthesizes the separated steady component and the separated non-steady component according to a given ratio, and an evaluation unit that evaluates the magnitude of the amount of the non-steady component in the input signal, wherein the synthesis unit sets the given ratio to a first ratio in an instance in which the evaluation unit determines the amount of the non-steady component to be equal to or less than a predetermined reference, and sets the given ratio to a second ratio, in which the proportion of the non-steady component is less than that of the first ratio, in an instance in which the evaluation unit determines the amount of the non-steady component to be greater than the predetermined reference.

Description

technical field [0001] The present invention relates to filter devices and the like. Background technique [0002] For example, in a pulsation detection device that detects a pulsation signal caused by the pulsation of a subject, filtering processing by a filtering device is performed as preprocessing for detecting the pulsation signal. The input signal of the filtering device is, for example, a pulse wave signal including a stable component of a pulsation signal and an unstable component of disturbing noise and a body motion component caused by the subject's body motion. [0003] For example, Patent Document 1 describes a technique for removing noise components contained in a pulse wave signal by filtering. In the technique described in Patent Document 1, a band-pass filter that passes a signal of a frequency close to the frequency indicating the pulse at that time is selected from among a plurality of band-pass filters. [0004] [Patent Document 1] Japanese Unexamined Pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0245
CPCA61B5/024A61B5/721
Inventor 高桥有亮
Owner SEIKO EPSON CORP