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A short-distance non-contact single-target respiration rate and respiration amplitude detection method

A non-contact, short-distance technology used in the field of respiration rate and respiration depth testing, which can solve problems such as inconvenience and achieve the effect of improving accuracy and low signal power

Active Publication Date: 2019-04-09
HANGZHOU MEGASENS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional testing methods for breathing rate and depth of breathing are usually done by using contact detection instruments such as chest straps and breathing catheters. Traditional contact testing methods have certain requirements for testing scenarios, and in some special scenarios, these traditional inconvenient way to use

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  • A short-distance non-contact single-target respiration rate and respiration amplitude detection method
  • A short-distance non-contact single-target respiration rate and respiration amplitude detection method
  • A short-distance non-contact single-target respiration rate and respiration amplitude detection method

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Embodiment Construction

[0011] 1 Short-distance non-contact single-target respiratory wave detection method

[0012] 1.1 System block diagram and principle

[0013] The absorption and emission characteristics of electromagnetic waves irradiated by human tissue depend on the dielectric properties of the tissue. When we use electromagnetic waves with a center frequency from 4G to 10.5G to directly irradiate the upper torso of the human body, the skin, bones and internal organs of the human body will reflect the electromagnetic waves to a certain extent. The reflected electromagnetic waves received by the wireless receiver within a short distance are called echoes. When we transmit a very narrow short-duration pulse, both the transmitted wave and the echo are a frequency-domain signal with a wide bandwidth and good time resolution.

[0014] System block diagram as figure 1 . Assume that the distance from the transmitting antenna to a reflection point on the human body is Dt, and the distance from th...

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Abstract

The invention discloses a short-distance non-contact type single objective breathing rate and breathing amplitude detection method. The method comprises the following steps that radio waves containing ultra-wideband impulses is used for directly irradiating to the chest of the human body, the skin of the chest of the human body, the skeleton inside the body and internal tissues reflect the radio waves, emitted echo waves will contain mechanical wave information brought by check breathing movement along with changes of time, a wireless receiver receives reflected electromagnetic waves in a short distance, the digital signal processing method with time-frequency noise reduction, self-feedback and multi-resolution decomposition is used for processing collected two-dimensional digital sequence containing fast time and slow time according to the characteristics of human body medium reflection, original breathing wave signals are recovered, and therefore the breathing rate and breathing amplitude of an objective person are obtained. The detection method is a non-contact type detection method high in breathing wave testing precision and causes no injury to the human body. The method is suitable for monitoring and recording the breathing rate and breathing amplitude of the human body in real time on various scenes in a short distance for a long time.

Description

technical field [0001] The invention relates to a method for testing respiration rate and respiration depth, in particular to a short-distance non-contact single-target respiration rate and respiration amplitude detection method. Background technique [0002] The human respiration rate, the cycle of exhalation and inhalation, and the change of respiration amplitude are the most important physiological indicators for the diagnosis of respiratory diseases and other related diseases. For example, in the detection of sleep-disordered breathing events, changes in breathing, including changes in breathing air volume and breathing rate, can reflect certain pathological characteristics of the human body. These pathological features are often used for early diagnosis of diseases such as arteriosclerosis. [0003] Traditional testing methods for breathing rate and depth of breathing are usually done by using contact detection instruments such as chest straps and breathing catheters. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/08
CPCA61B5/0816A61B5/7203A61B5/725
Inventor 韦晓东
Owner HANGZHOU MEGASENS TECH CO LTD