CN109199389A - A kind of respiratory rate monitoring method based on nanometer wave technology - Google Patents
A kind of respiratory rate monitoring method based on nanometer wave technology Download PDFInfo
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- CN109199389A CN109199389A CN201811078383.9A CN201811078383A CN109199389A CN 109199389 A CN109199389 A CN 109199389A CN 201811078383 A CN201811078383 A CN 201811078383A CN 109199389 A CN109199389 A CN 109199389A
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- signal
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- echo
- nanometer
- nanometer wave
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/0816—Measuring devices for examining respiratory frequency
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
Abstract
The present invention relates to a kind of respiratory rate monitoring methods based on nanometer wave technology, comprising the following steps: determines reference target, and sends nanometer wave signal to reference target；The echo-signal after reference target reflects is received with the different receiving antenna in two positions, obtains wave-path rate；The nanometer wave signal of transmission is converted to narrowband low-angle to be irradiated, then emission nanometer wave signal；New echo-signal is received, and the minor change of final goal body is obtained according to the wave-path rate；The number for counting final goal body minor change in the set time, obtains the respiratory rate of target.The present invention can distally accurately measure and recording respiration.
Description
Technical field
The present invention relates to monitoring of respiration technical fields, more particularly to a kind of respiratory rate monitoring side based on nanometer wave technology
Method.
Background technique
Now, with people's lives level improve, itself health and happiness are important to note that and are concerned about, people for
Expectation far from other detection modes other than medical environment is also improving.In practice for old man other than professional medical mechanism
When unattended, when travelling outdoors；The discomfort that may especially occur when taking pleasure boat will lead to physiology
Variation, sudden illness often make household be caught unprepared.
Respiratory rate is an important sign of life, and respiratory rate and breathing pattern are also considered as the personal basis health of reflection
The good index of situation can contribute to understand the holistic health and sleep product of a people by the monitoring to respiratory rate
Matter.Respiratory rate monitoring device currently on the market, most technologies be it is intrusive, need testee and measuring device being connected to one
It rises.Even simple electromechanical respiratory rate measurement generally also must bind an elastic webbing in the chest of testee.Other sound
Learn technical requirements and device be connected to the neck of testee, and capacitance technology then require to install in bed a kind of bed mattress special or
Sensing element is installed on the body of testee.Existing mode is not suitable for public guest room using being all inconvenient yet.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of respiratory rate monitoring methods based on nanometer wave technology, can
It is distally accurately measuring and recording respiration.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of respiratory rate based on nanometer wave technology
Monitoring method, comprising the following steps:
(1) it determines reference target, and sends nanometer wave signal to reference target；
(2) echo-signal after reference target reflects is received with the different receiving antenna in two positions, obtains wave-path
Rate；
(3) the nanometer wave signal of transmission is converted to narrowband low-angle to be irradiated, then emission nanometer wave signal；
(4) new echo-signal is received, and the minor change of final goal body is obtained according to the wave-path rate；
(5) number for counting final goal body minor change in the set time, obtains the respiratory rate of final goal.
The step (2) specifically includes following sub-step:
(21) signal will be emitted as reference signal, respectively by the received echo-signal of two receiving antennas and reference signal
Difference frequency processing is done, signal two receiving antennas is obtained treated；
(22) obtain two receiving antennas treated signal is subjected to related operation, obtains the mutual of two echo-signals
Correlation function；
(23) according to the cross-correlation function, where estimating the highest spectral peak of two echo-signals with frequency estimating methods
The corresponding frequency values in position；
(24) according to the corresponding frequency values in highest spectral peak position and two receiving antennas difference of two echo-signals
Linear relationship between the wave path-difference of the echo-signal received obtains the echo-signal that two receiving antennas are respectively received
Wave-path rate.
The calculation of wave path-difference rate is td=2R/c in the step (24), wherein td is wave-path rate, and R is reference
For target at a distance from emitter, c is the light velocity.
Pass through td/f in the step (3)0=(T/2)/F converts the nanometer wave signal of transmission, wherein td is wave
Path difference rate, f0For the difference on the frequency for emitting signal and echo-signal, T is the nanometer wave period of modulation, and F is the nanometer wave band of modulation
It is wide.
Low-angle in the step (3) is 1-15 degree.
Target body is obtained by the trigonometric function relationship between echo-signal and the spacing of receiving antenna in the step (4)
The minor change of body, wherein the distance of final goal is according to R'=[(c*T)/4F] * f0Be calculated, R' be final goal with
The distance of emitter, c are the light velocity, and T is the nanometer wave period of modulation, and F is the nanometer wave bandwidth of modulation, f0For transmitting signal with
The difference on the frequency of echo-signal.
Further include the steps that reducing noise using deep learning frame training mode in the step (4).
Beneficial effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit: the present invention, as monitoring medium, without contacting with body, will not be waited objects to hinder using nanometer wave by clothes or bed
Hinder, can distally accurately measure and recording respiration.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 is the structural schematic diagram of nanometer wave sensing device in the present invention；
Fig. 3 is the trigonometric function relation schematic diagram between echo-signal and the spacing of receiving antenna.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiments of the present invention are related to a kind of respiratory rate monitoring method based on nanometer wave technology, as shown in Figure 1, including
Following steps: it determines target, and sends nanometer wave signal to target；It is received with the different receiving antenna in two positions and passes through target
Echo-signal after reflection obtains wave-path rate；The nanometer wave signal of transmission is converted to narrowband low-angle to be irradiated, then is sent out
Penetrate nanometer wave signal；New echo-signal is received, and the minor change of intended body is obtained according to the wave-path rate；Statistics is solid
The number for interior intended body minor change of fixing time, obtains the respiratory rate of target.
The structure of the nanometer wave sensing device used in present embodiment is as shown in Figure 2 comprising at least two set side by side
The receiving antenna and at least one transmitting antenna set, when use, can be installed on roof.When being detected, specifically
Steps are as follows:
Step 1: determining target, nanometer wave signal is sent from transmitting antenna to target after determination.
Step 2: receiving the echo-signal after target reflects with the different receiving antenna in two positions, wave-path is obtained
Rate.Its detailed process are as follows: using transmitting signal as reference signal, respectively by two received echo-signals of receiving antenna and ginseng
It examines signal and does difference frequency processing, obtain two receiving antennas treated signal；By obtain two receiving antennas treated letter
Number carry out related operation, obtain the cross-correlation function of two echo-signals.According to the cross-correlation function, frequency estimating methods are used
Estimate the corresponding frequency values in highest spectral peak position of two echo-signals.According to the highest spectral peak institute of two echo-signals
Linear relationship between the wave path-difference for the echo-signal that the corresponding frequency values in position and two receiving antennas are respectively received, obtains
The wave-path rate for the echo-signal being respectively received to two receiving antennas.Wave-path rate calculation are as follows: td=2R/c,
In, td is wave-path rate, and R is reference target at a distance from emitter, and c is the light velocity.
It is irradiated Step 3: the nanometer wave signal of transmission is converted to narrowband low-angle after obtaining wave-path rate, then
Emission nanometer wave signal.Wherein, pass through td/f0=(T/2)/F converts the nanometer wave signal of transmission, wherein td is wave
Path difference rate, f0For the difference on the frequency for emitting signal and echo-signal, T is the nanometer wave period of modulation, and F is the nanometer wave band of modulation
It is wide.The range of low-angle in present embodiment is 1-15 degree.
Step 4: receiving new echo-signal, and the minor change of intended body is obtained according to the wave-path rate.This reality
The mode of applying is to obtain the minor change of intended body by the trigonometric function relationship between echo-signal and the spacing of receiving antenna,
Its schematic diagram is as shown in figure 3, azimuth angle alphaAZIt is between receiving antenna RX1 and receiving antenna RX2 by nanometer wave sensing device
Geometric distance d and two nanometer wave sensing devices the received reflection echo of receiving antenna phase difference b, then pass through
What trigonometric function was calculated, wherein the distance of final goal is according to R'=[(c*T)/4F] * f0It is calculated, R' is final
For target at a distance from emitter, c is the light velocity, and T is the nanometer wave period of modulation, and F is the nanometer wave bandwidth of modulation, f0For transmitting
The difference on the frequency of signal and echo-signal.According to azimuth angle alphaAZVariation can detect the minor change of intended body.It is worth one
It is mentioned that, since nanometer wave sensitivity is very high, in order to improve accuracy, present embodiment also uses deep learning frame training mould
Formula reduces noise to prevent from reporting by mistake.
Step 5: counting the number of intended body minor change in the set time, the respiratory rate of target is obtained, that is,
It says, after detecting the minor change of intended body, can count in 1 minute, the number that minor change occurs, so
Obtain the respiratory rate of target.
Step 6: according to the breathing rate conversion heart rate of target.
It it is not difficult to find that the present invention is suitable for the people of all age levels and figure, and is the monitoring of non-intrusion type, it can
Protect the privacy of testee.The present invention using nanometer wave as monitoring medium, realize without contact with body can distally
It accurately measures and recording respiration, entire monitoring process can be hindered by equal objects by clothes or bed without worry, be suitable for
The room of monitoring camera-shooting should not be installed similar to public guest room etc..
Claims (7)
1. a kind of respiratory rate monitoring method based on nanometer wave technology, which comprises the following steps:
(1) it determines reference target, and sends nanometer wave signal to reference target；
(2) echo-signal after reference target reflects is received with the different receiving antenna in two positions, obtains wave-path rate；
(3) the nanometer wave signal of transmission is converted to narrowband low-angle to be irradiated, then emission nanometer wave signal；
(4) new echo-signal is received, and the minor change of final goal body is obtained according to the wave-path rate；
(5) number for counting final goal body minor change in the set time, obtains the respiratory rate of final goal.
2. the respiratory rate monitoring method according to claim 1 based on nanometer wave technology, which is characterized in that the step
(2) following sub-step is specifically included:
(21) signal will be emitted as reference signal, respectively make the difference two received echo-signals of receiving antenna with reference signal
Frequency is handled, and obtains two receiving antennas treated signal；
(22) obtain two receiving antennas treated signal is subjected to related operation, obtains the cross-correlation of two echo-signals
Function；
(23) according to the cross-correlation function, the highest spectral peak position of two echo-signals is estimated with frequency estimating methods
Corresponding frequency values；
(24) it is received respectively according to the corresponding frequency values in highest spectral peak position of two echo-signals with two receiving antennas
Linear relationship between the wave path-difference of the echo-signal arrived obtains the wave-path for the echo-signal that two receiving antennas are respectively received
Rate.
3. the respiratory rate monitoring method according to claim 1 based on nanometer wave technology, which is characterized in that the step
(24) calculation of wave path-difference rate is td=2R/c in, wherein td is wave-path rate, and R is reference target and emitter
Distance, c are the light velocity.
4. the respiratory rate monitoring method according to claim 1 based on nanometer wave technology, which is characterized in that the step
(3) pass through td/f in0=(T/2)/F converts the nanometer wave signal of transmission, wherein td is wave-path rate, f0For transmitting letter
Difference on the frequency number with echo-signal, T are the nanometer wave period of modulation, and F be the nanometer wave bandwidth modulated.
5. the respiratory rate monitoring method according to claim 1 based on nanometer wave technology, which is characterized in that the step
(3) low-angle in is 1-15 degree.
6. the respiratory rate monitoring method according to claim 1 based on nanometer wave technology, which is characterized in that the step
(4) minor change of intended body is obtained by the trigonometric function relationship between echo-signal and the spacing of receiving antenna in,
In, the distance of final goal is according to R'=[(c*T)/4F] * f0It is calculated, R' is final goal at a distance from emitter, c
For the light velocity, T is the nanometer wave period of modulation, and F is the nanometer wave bandwidth of modulation, f0For the frequency for emitting signal and echo-signal
Difference.
7. the respiratory rate monitoring method according to claim 1 based on nanometer wave technology, which is characterized in that the step
(4) further include the steps that reducing noise using deep learning frame training mode in.
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Application publication date: 20190115 |