CN110115583A - The method and apparatus of monitoring of respiration - Google Patents
The method and apparatus of monitoring of respiration Download PDFInfo
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- CN110115583A CN110115583A CN201810124121.5A CN201810124121A CN110115583A CN 110115583 A CN110115583 A CN 110115583A CN 201810124121 A CN201810124121 A CN 201810124121A CN 110115583 A CN110115583 A CN 110115583A
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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
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
- A61B5/6891—Furniture
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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
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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
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/746—Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2503/00—Evaluating a particular growth phase or type of persons or animals
- A61B2503/08—Elderly
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Abstract
The embodiment of the present invention provides a kind of method and apparatus of monitoring of respiration.The original signal sent the method includes receiving pressure sensing band, the original signal include the pressure value that bedding is born；Simulation conversion number AD sampling processing is carried out to the original signal, obtains breath signal；According to the breath signal, respiratory rate is calculated.The original signal for carrying the pressure value that bedding is born that the method is sent by receiving pressure sensing band, and respiratory rate is obtained according to original signal, the acquisition of original signal can be carried out in the case where not contacting human body, thus economical and easily carry out monitoring of respiration.
Description
Technical field
The present embodiments relate to medicine technology field, especially a kind of method and apparatus of monitoring of respiration.
Background technique
China comes into aging Rapid development stage, and statistical data is shown, China's aging populations number is within 2015
2.1 hundred million, wherein 60 years old or more population ratio is 15.7%, it is contemplated that the year two thousand twenty China aging populations number is up to 2.48 hundred million, 60
Year old or more population ratio be 17.0%, enter severe ageing stage to the year two thousand fifty, aging populations number in China's is up at that time
4.37 hundred million, 60 years old or more population ratio is 30.0%, it is meant that just have an old man in every four people, China's aging speed it
It is fast unprecedented.
With the development of aging of population, Empty nest elderly and old solitary people are more and more, healthy, the safe shape of these old men
Condition has obtained more and more social concerns.
It is easy the various diseases of burst for the middle-aged and the old, when night's rest, therefore is monitored in the sleep procedure of old man
Vital sign largely can prevent Empty nest elderly from unexpectedly occurring, and the general level of the health and good fortune of old man can be improved
Good fortune index.
Breathing, body temperature, pulse, blood pressure are the four big vital signs of people, wherein breathing is life as first of vital sign
The great index deposited.
The mode for monitoring breathing in the prior art mainly monitors respiratory rate, and respiratory rate indicates time breathed per minute
Number, i.e. an air-breathing and primary expiration.
Monitoring is realized using the monitoring of respiration instrument of profession in the prior art, professional monitoring of respiration instrument is desk-top mostly
Machine, it is at high cost, it is complicated for operation, it is inconvenient to use, it is only capable of in fixed-sites pair such as medical institutions, physical examination mechanism, community, homes for destitute
User is monitored, and application scenarios are extremely limited.
If old man lives at oneself, the unprofessional monitoring of respiration instrument of family can not then carry out healthy tracking.
As it can be seen that monitoring the at high cost and inconvenient for use of breathing in currently available technology.
Summary of the invention
In view of the drawbacks of the prior art, the embodiment of the present invention provides a kind of method and apparatus of monitoring of respiration.
On the one hand, the embodiment of the present invention provides a kind of method of monitoring of respiration, which comprises
The original signal that pressure sensing band is sent is received, the original signal includes the pressure value that bedding is born；
Simulation conversion number AD sampling processing is carried out to the original signal, obtains breath signal；
According to the breath signal, respiratory rate is calculated.
On the other hand, the embodiment of the present invention provides a kind of device of monitoring of respiration, and described device includes:
Receiving module, for receiving the original signal of pressure sensing band transmission, the original signal includes what bedding was born
Pressure value；
Processing module obtains breath signal for carrying out simulation conversion number AD sampling processing to the original signal；
Computing module, for calculating respiratory rate according to the breath signal.
On the other hand, the embodiment of the present invention also provides a kind of electronic equipment, including memory, processor, bus and deposits
The computer program that can be run on a memory and on a processor is stored up, the processor is realized when executing described program with top
The step of method.
On the other hand, the embodiment of the present invention also provides a kind of storage medium, is stored thereon with computer program, described program
The step of method as above is realized when being executed by processor.
As shown from the above technical solution, the method and apparatus of monitoring of respiration provided in an embodiment of the present invention, the method are logical
The original signal for receiving the pressure value for carrying bedding receiving that pressure sensing band is sent is crossed, and is breathed according to original signal
Frequency can carry out the acquisition of original signal in the case where not contacting human body, thus economical and easily carry out monitoring of respiration.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the method for monitoring of respiration provided in an embodiment of the present invention；
Fig. 2 is breath signal schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the original signal schematic diagram that further embodiment of this invention provides；
Fig. 4 is the structural schematic diagram of the device for the monitoring of respiration that further embodiment of this invention provides；
Fig. 5 is the breath signal peak value schematic diagram that further embodiment of this invention provides；
Fig. 6 is the peak value schematic diagram that the breath signal that further embodiment of this invention provides primarily determines；
Fig. 7 is the method flow schematic diagram for the monitoring of respiration that further embodiment of this invention proposes；
Fig. 8 is the structural schematic diagram of the device for the monitoring of respiration that further embodiment of this invention provides；
Fig. 9 is the structural schematic diagram for a kind of electronic equipment that further embodiment of this invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
Embodiment a part of the embodiment, instead of all the embodiments.
Fig. 1 shows a kind of flow diagram of the method for monitoring of respiration provided in an embodiment of the present invention.
As shown in Figure 1, method provided in an embodiment of the present invention specifically includes the following steps:
Step 11 receives the original signal that pressure sensing band is sent, and the original signal includes the pressure value that bedding is born；
Method provided in an embodiment of the present invention realizes on the device of monitoring of respiration, the device of the monitoring of respiration be with
The processor of signal processing function.
Optionally, the pressure sensing band is set under bedding, and bedding is the device to lie down for human body, such as bed
Pad.
Optionally, the pressure sensing band can be not directly contacted with human body, can also measure to respiratory rate, the present invention
It is illustrated so that the pressure sensing band is set under mattress as an example in embodiment.
Optionally, the pressure sensing band includes at least one pressure sensor (Pressure Transducer), pressure
Sensor is used for the variation of induction pressure, and the variation of pressure is converted into original signal, original signal describe voltage value with
Time change situation.
Optionally, piezoceramic transducer realization can be used in pressure sensor.
Optionally, when breathing, abdominal cavity can rise and fall people, thereby result in the different pressure values of mattress receiving,
Piezoceramic transducer obtains original signal according to the changing value of pressure.
The original signal that piezoceramic transducer detects is sent to processor by the pressure sensing band, and processor is receiving
After the original signal, step 12 is executed.
Step 12 carries out simulation conversion number AD sampling processing to the original signal, obtains breath signal；
Optionally, processor can realize the analysis processing function to original signal, and provide+1.5V for pressure sensor
Reference voltage.
Optionally, processor includes operational amplifier and AD (analog to digital, simulation conversion number) module.
Optionally, since the original signal of pressure sensor acquisition may be very faint, processing need to be amplified, with clear
The waveform of original signal determines the position of wave crest and trough.
Optionally, signal amplification is completed using operational amplifier, it is contemplated that amplification factor is too high to will appear spilling, settable
Amplification factor is 10 times.
Optionally, A/D module carries out AD sampling to the original signal by amplification.
Optionally, original signal belongs to analog signal, and AD sampling is analog signal to be converted into digital signal, then sets
Sample frequency.
Optionally, sample frequency refers to that each second acquires how many a sampled points.
Optionally, several sampled points are selected from digital signal (original signal), sampling is constituted by the sampled point selected
Signal.
Optionally, under conditions of meeting sampling thheorem, it is contemplated that data space and computation complexity, the present invention are real
It applies example and sample frequency is set as 100Hz (1s acquires 100 sampled points).
Optionally, sampling thheorem illustrates the relationship between sample frequency and digital signal, is the base of continuous signal discretization
This foundation.Sampling thheorem is when sample frequency is greater than 2 times of highest frequency in digital signal, and sampled signal completely remains
Information in digital signal.
Optionally, the original signal of pressure sensor acquisition may contain noise, can carry out denoising to sampled signal,
To obtain the breath signal of reflection breathing.
Fig. 2 is breath signal schematic diagram provided in an embodiment of the present invention.
As shown in Fig. 2, breath signal describes the voltage change situation of each sampled point at any time.Abscissa is sampled point
Number, ordinate are voltage (v), and the unit that pressure sensor directly detects is mv, single after operational amplifier amplifies
Position is v.
Step 13, according to the breath signal, calculate respiratory rate.
Optionally, with the sampled point of acquisition in 1 minute (60*100) for a unit, check that how many is a in each unit
Wave crest, a wave crest are denoted as respiration, and each minute respiratory rate is the number of a unit medium wave peak.
Using the pressure sensing band of the embodiment of the present invention, the pressure value born by pressure sensing band detection bedding, rather than
Human body is directly contacted, therefore is detected when not generating constraint to human body, original signal is obtained, cost is relatively low, uses
It is convenient, it also can reduce the psychological pressure of user, further signal processing carried out by processor, finally obtains respiratory rate,
It realizes and the long-time of human health is monitored under natural sleep state.
The method of monitoring of respiration provided in this embodiment carries what bedding was born by what reception pressure sensing band was sent
The original signal of pressure value, and respiratory rate is obtained according to original signal, original letter can be carried out in the case where not contacting human body
Number acquisition, thus economical and easily carry out monitoring of respiration.
On the basis of the above embodiments, the method for the monitoring of respiration that further embodiment of this invention provides, the original letter
Number include breath signal and heartbeat signal, correspondingly, to the original signal carry out simulation conversion number AD sampling processing, obtain
The step of breath signal specifically:
Bandpass filtering is carried out to the original signal, heartbeat signal is eliminated, obtains the breath signal.
Fig. 3 is the original signal schematic diagram that further embodiment of this invention provides.
As shown in figure 3, everyone sleeping position is different, the position to lie down is also different, and heartbeat when can also generate not
The vibration of same frequency, pressure sensor also detect and obtain pressure value caused by heartbeat, and the variation of pressure value caused by heartbeat is claimed
For heartbeat signal.
That is, the actually detected obtained original signal includes breath signal and heartbeat signal, in breath signal
In be superimposed heartbeat signal, heartbeat signal generates interference to breath signal.
Optionally, after carrying out AD sampling, bandpass filtering is carried out to obtained sampled signal, obtains as shown in Figure 2 exhale
Inhale signal.
Because respiratory rate, generally between 6 times/min to 42/min, Design of Bandpass is the FIR of 80 ranks
(Finite Impulse Response, finite impulse response) bandpass filter, design parameter Fstop1=0.08；
Fpass1=0.1；Fpass2=0.5；Fstop2=0.7；Eliminate influence of other signals to respiratory waveform.Original signal is passed through
After filtering, respiratory waveform figure is obtained.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment can eliminate heartbeat by carrying out bandpass filtering to original signal
Influence of the signal to breath signal, to obtain the breath signal in original signal.
Fig. 4 is the structural schematic diagram of the device for the monitoring of respiration that further embodiment of this invention provides.
As shown in figure 4, on the basis of the above embodiments, the method for the monitoring of respiration that further embodiment of this invention provides,
The pressure sensing band includes multiple pressure sensors, the pressure that a region of each pressure sensor detection bedding is born
Value, correspondence obtain an original signal；Correspondingly, simulation conversion number AD sampling processing is carried out to the original signal, obtained
The step of breath signal specifically:
Processor calculates the energy of each original signal according to multiple original signals；
According to the maximum original signal of energy in original signal, AD sampling processing is carried out, the breath signal is obtained.
Optionally, the device of monitoring of respiration includes pressure sensing band 2, signal wire 3 and processor 4, and pressure sensing band 2 includes
Multiple piezoceramic transducers 1, processor 4 and pressure sensing band 2 are connected by signal wire 3, and signal wire 3 senses piezoelectric ceramics
The original signal of device 1 is transferred to processor 4.
Optionally, everyone sleeping position is different, and the position to lie down is also different, and multiple piezoelectricity are arranged in pressure sensing band 2
Ceramic sensor element, a region of the corresponding detection bedding of each piezoceramic transducer, each piezoceramic transducer obtain one
Road original signal, the whole available multiple original signals of pressure sensing band 2, each original signal can reflect the breathing of people
Situation.
Processor when carrying out signal processing, can the original signal only to a piezoceramic transducer 1 divide
Analysis, obtains the breath signal, so that the respiratory rate of human body is obtained, without all dividing obtained multichannel original signal
Analysis.
The energy of the original signal of piezoceramic transducer immediately below human body is passed commonly greater than other piezoelectric ceramics
The pressure value of the energy of the original signal of sensor, the piezoceramic transducer detection immediately below human body can most reflect the vibration in abdominal cavity
It is dynamic, by calculating the energy of each original signal, the maximum original signal all the way of energy is then selected, for calculating breathing frequency
Rate.
Optionally, after carrying out AD sampling, start the energy for calculating each original signal.
Optionally, there are many modes for calculating the energy of original signal, and the embodiment of the present invention is carried out by taking one of which as an example
Explanation.
Processor is according to multiple original signals, the step of calculating the energy of each original signal specifically:
According to the quadratic sum of the voltage value of all sampled points of each original signal, the energy of the original signal is obtained.
Optionally, all the way the energy of original signal be equal to the road original signal all sampled points voltage value square
With the energy of the original signal of more each piezoceramic transducer takes the corresponding original signal of ceiling capacity.
Optionally, it after obtaining the maximum original signal of energy, to the maximum original signal of energy, carries out at AD sampling
Reason and bandpass filtering treatment, so as to be accurately obtained breath signal.
Optionally, multiple pressure sensors (piezoceramic transducer) are arranged still may be used in the position change that human body lies down
To there is pressure sensor that can correspond to abdominal cavity position, so as to obtain accurate original signal.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment obtains multiple original signals by multiple pressure sensors, and from
The maximum original signal of energy is selected to be analyzed and processed in multiple original signals, available accurate original signal.
Fig. 5 is the breath signal peak value schematic diagram that further embodiment of this invention provides.
As shown in figure 5, on the basis of the above embodiments, the method for the monitoring of respiration that further embodiment of this invention provides,
Processor is according to breath signal, the step of calculating respiratory rate specifically:
According to the position of the adjacent peaks of the breath signal, the interval of adjacent peaks is calculated:
According to multiple intervals, average respiratory intervals are obtained；
According to average respiratory intervals and preset sample frequency, respiratory rate is obtained.
Optionally, the position for obtaining each wave crest of breath signal, by the position mark of wave crest as shown in figure 5, and adopting
Crest location is described with the number of sampled point, the position that such as the 100th sampled point is the 1st wave crest.
Optionally, according to the position of adjacent wave crest, the interval of adjacent peaks is calculated:
Yi=Xi+1-XI, i=1,2 ...
In formula, YiFor the interval of adjacent peaks, XiFor a crest location, Xi+1For with XiAdjacent next wave crest position
It sets, i is positive integer.
To obtain several intervals Y in each uniti, each interval being divided between two breathings.
Optionally, available sampling point number is spaced to indicate, that is to say, that since a wave crest, is spaced how many
Sampled point obtains next wave crest.
If the wave crest of the 1st breathing is the 100th sampled point, the wave crest of the 2nd breathing is the 480th sampled point, then the
380 sampled points are divided between one.
Optionally, for each unit (sampled point of acquisition in 1 minute 60*100), the quantity of statistical interval, to institute
It states interval to be averaged using following formula, obtains average respiratory intervals.
Wherein,For average respiratory intervals, YiIt is spaced for i-th, n is the sum at interval, and n is positive integer.
Optionally, the respiratory rate of each unit (minute) is obtained according to following formula:
Wherein, P is respiratory rate, and unit is beat/min, and f is sample frequency, such as 100HZ/ seconds.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment analyzes the wave crest of breath signal, can more accurately be breathed
Frequency.
Fig. 6 is the peak value schematic diagram that the breath signal that further embodiment of this invention provides primarily determines.
As shown in fig. 6, on the basis of the above embodiments, the method for the monitoring of respiration that further embodiment of this invention provides,
According to the position of the adjacent peaks of breath signal, before the step of calculating the interval of adjacent peaks, the method also includes:
The voltage value for remembering current sampling point is curData, and the voltage value of the previous sampled point of current sampling point is
PreData, the voltage value of next sampled point of current sampling point are nextData；
If curData-preData > 0 and curData-nextData > 0 primarily determine current sampling point for wave crest
Position.
Optionally, it in the position according to the adjacent peaks of breath signal, before the step of calculating the interval of adjacent peaks, needs
First determine the position of each wave crest.
When meeting curData-preData > 0, and when curData-nextData > 0, current sampling point is primarily determined
For the position of wave crest.
Optionally, the position mark of obtained wave crest is as shown in Figure 6.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment can be fast according to the voltage value of the sampled point of analysis breath signal
The position at fast standing wave peak really.
As shown in fig. 6, on the basis of the above embodiments, the method for the monitoring of respiration that further embodiment of this invention provides,
Two adjacent peaks include the lesser sampled point of voltage value and the biggish sampled point of voltage value, correspondingly, by current sampling point
After the step of primarily determining the position for wave crest, the method also includes:
If the interval of adjacent peaks is less than first threshold, using the biggish sampled point of voltage value as wave crest.
Optionally, the wave crest tentatively obtained may not be the position of the sampled point of actual waveform peak, for example, the 100th
Wave crest near a sampled point, because all meeting curData-preData > 0 and curData- there are two sampled point
NextData > 0 is then marked the position of two wave crests, but only exists from being evident that near the 100th sampled point in Fig. 6
One wave crest.
In embodiments of the present invention, can be from the abscissa of the waveform of breath signal: the angle of time be each to what is primarily determined
A wave crest is screened, to exclude abnormal sampled point.
If the interval between two wave crests is less than first threshold, using the big sampled point of voltage value as wave crest, by voltage
It is worth smaller sampled point and is not re-used as wave crest.
Optionally, the interval that the time interval between two wave crests breathes twice, first threshold can be come according to the actual situation
Setting, such as 1.5 seconds.Human body is less likely to be breathed twice in 1.5 seconds, wherein having a wave crest is erroneous judgement, it is practical not answer
As wave crest.
By taking sample frequency is 100Hz as an example, compare two wave crests, if the number of the sampled point between two wave crests is less than
150, then the sampled point for selecting voltage value big is not re-used as wave crest as wave crest, by the smaller sampled point of voltage value.
If the number of the sampled point between two wave crests is not less than 150, it all regard two wave crests as wave crest.
Optionally, after screening, the wave crest such as Fig. 5 can be obtained, for the wave crest after screening, calculate between adjacent peaks
Every average respiratory intervals being obtained, so as to be accurately obtained respiratory rate further according to multiple intervals.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment screens the wave crest primarily determined from the angle of time, root
According to the wave crest after screening, respiratory rate can be accurately calculated.
As shown in fig. 6, on the basis of the above embodiments, the method for the monitoring of respiration that further embodiment of this invention provides,
Two adjacent peaks include the lesser sampled point of voltage value and the biggish sampled point of voltage value, correspondingly, by current sampling point
After the step of primarily determining the position for wave crest, the method also includes:
If peak parameters are less than second threshold, using the biggish sampled point of voltage value as wave crest；
The peak parameters λ is calculated according to the following formula:
λ=(smallPeak-Valley)/(largePeak-Valley)
In formula, smallPeak is the voltage value of the lesser sampled point of voltage value in two adjacent peaks, and largePeak is
The voltage value of the biggish sampled point of voltage value, Valley are the voltage value of the smallest sampled point between two adjacent peaks.
Optionally, the wave crest tentatively obtained may not be the position of the sampled point of actual waveform peak, for example, close to wave
The 300th sampled point of paddy, also because by preliminary true when meeting curData-preData > 0 and curData-nextData > 0
It is set to wave crest, but it is evident that the 300th sampled point is clearly not wave crest from Fig. 6, and close to trough.It can be from the vertical of waveform
Coordinate: the angle of peak value is to primarily determining that the sampled point for wave crest screens, to exclude abnormal sampled point.
Peak parameters λ is defined, λ is compared with second threshold, it is if it is less than second threshold, then voltage value is biggish
Sampled point is not re-used as wave crest as wave crest, by the smaller sampled point of voltage value.
If λ is not less than second threshold, two adjacent peaks are wave crest really,
Optionally, second threshold can be arranged according to the actual situation, such as 0.35.
The molecule of λ=(smallPeak-Valley)/(largePeak-Valley), λ are the electricity of smallPeak and trough
The voltage difference of pressure value, denominator are the voltage difference of the voltage value of largePeak and trough.
If λ less than 0.35, indicates that molecule is smaller with respect to denominator, the voltage difference very little of the voltage of smallPeak and trough,
Then the corresponding sampled point of smallPeak should not be used as wave crest.
If λ is more than or equal to 0.35, two peak values all retain.
Optionally, after screening, the wave crest such as Fig. 5 is obtained, for the wave crest after screening, is calculated between adjacent peaks
Every average respiratory intervals being obtained, so as to accurately calculate respiratory rate further according to multiple intervals.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment screens the wave crest primarily determined from the angle of peak value, root
According to the wave crest after screening, respiratory rate can be accurately calculated.
On the basis of the above embodiments, further embodiment of this invention provide monitoring of respiration method, processor according to
After the step of breath signal, calculating respiratory rate, the method also includes:
When the respiratory rate is lower than lower limit or is more than the upper limit, alarm information is sent to remote equipment.
Optionally, the respiratory rate is compared by processor with preset high and low thresholds, when respiratory rate exception, certainly
Dynamic triggering alarm sends alarm information to remote equipment by network.
Respiratory rate extremely can there are two types of situation, one, respiratory rate be lower than lower limit, two, respiratory rate be more than the upper limit, occur
Any case belongs to respiratory rate exception, triggering alarm.
Lower and upper limit can be arranged according to the health condition of user.
Remote equipment is the corresponding remote equipment of device of monitoring of respiration, and remote equipment can be the end of the family members of user
End can also be the monitoring platform of health agency, to realize the health and safety of monitoring house old man.
Other steps of the present embodiment are similar to previous embodiment step, and this embodiment is not repeated.
The method of monitoring of respiration provided in this embodiment, when the respiratory rate is lower than lower limit or is more than the upper limit, to
Remote equipment sends alarm information, realizes remote health monitoring.
In order to more fully understand technology contents of the invention, on the basis of the above embodiments, the present embodiment is described in detail
The method of the monitoring of respiration of offer.
In view of the drawbacks of the prior art, the embodiment of the present invention provides a kind of non-contact, unperturbed formula suitable for long distance monitoring
Monitoring of respiration method is realized to the real-time monitoring breathed during human body bed, and provides abnormal auto-alarming function, it can be achieved that right
The health and safety of house old man is guarded.
Using new technologies such as Internet of Things, information communications, remote domestic health monitoring is realized, promote old-age group's health clothes in China
Business is horizontal.
Monitoring of respiration basic principle:
The device that the embodiment of the present invention provides a kind of monitoring of respiration is as shown in Figure 4.Piezoceramic transducer 1 perceives human body pressure
Power variable signal obtains respiration information by signal processing technology, realizes and monitors under bed state to the long-time of breathing.
Optionally, the variation of 1 induction pressure of piezoceramic transducer, pressure sensing band 2 can play fixed piezoelectric ceramics and pass
The original signal of piezoceramic transducer 1 is passed to processor 4 by the effect of sensor 1, signal wire 3, and processor 4 is to original signal
It is handled, and provides the reference voltage of+1.5V for piezoceramic transducer 1.
Breath measuring method is specific as follows:
Fig. 7 is the method flow schematic diagram for the monitoring of respiration that further embodiment of this invention proposes.
As shown in fig. 7, piezoceramic transducer acquires multichannel original signal, by signal amplification, AD (modulus) sampling, choosing
Select optimum signal channel, signal processing and etc. after, finally obtain respiratory rate.
Step 1: signal acquisition
When breathing, abdominal cavity can rise and fall people, cause to pressure value different on piezoceramic transducer, these
Pressure value is exactly to breathe original signal.Meanwhile the heartbeat of people can also generate similar influence, actually fold in breathing original signal
Add heartbeat signal, interference is generated to breath signal, as shown in Figure 3.
Step 2: signal amplification
Since the signal of piezoceramic transducer acquisition is very faint, in order to extract useful signal, need to amplify place
Reason.Signal amplification is completed by operational amplifier, it is contemplated that amplification factor is too high to will appear spilling, and amplification factor is 10 times here.
Step 3:AD sampling
Breathing original signal to multichannel by amplification carries out AD sampling.Under conditions of meeting sampling thheorem, it is contemplated that
Data space and computation complexity, sample frequency are set as 100Hz.
Step 4: selection optimum signal channel
Everyone sleeping position is different, and the position of sleep is also different, is capable of increasing using multiple piezoceramic transducers
The range of monitoring of respiration.Multiple sensors can reflect the breathing situation of people, only need to be to 1 tunnel when carrying out signal processing
The original signal of sensor is analyzed.Actual observation finds that the sensor signal energy immediately below human body is often big
In other sensors, by calculating the energy of all the sensors signal, the maximum signal all the way of energy is then selected, based on
Calculate respiratory rate.
Step 5: signal processing
Signal processing is to obtain respiratory rate, and process is as follows:
(1) bandpass filtering
Because respiratory rate, generally between 6 times/min to 42/min, Design of Bandpass is the FIR band of 80 ranks
Bandpass filter, design parameter Fstop1=0.08；Fpass1=0.1；Fpass2=0.5；Fstop2=0.7；Eliminate other
Influence of the signal to respiratory waveform.Original signal obtains the waveform diagram of breath signal, as shown in Figure 2 after filtering.
(2) respiratory waveform peak intervals are obtained
Time interval between wave crest is the key that calculate respiratory rate.Calculating process is as follows: note current data point is
CurData, previous data point are preData, and next data point is nextData.When meeting curData-preData > 0
And when curData-nextData > 0, indicate that current data is peak value.Peak markers are as shown in Figure 6.
(3) abnormal point excludes
The exclusion of abnormal point is mainly completed by two steps:
Step 1: if the time interval between two peak values selected the maximum value between two peak values, and deleted less than 1.5 seconds
Except that smaller.
Step 2: defined parameters λ, any two adjacent peaks are lesser to be denoted as smallPeak, and biggish one is
LargePeak, the minimum value between two peak values is Valley, and formula is as follows.
λ=(smallPeak-Valley)/(largePeak-Valley)
Two peak values all retain if λ is greater than 0.35, otherwise, delete that lesser peak value.
After completing above-mentioned two step, the rate calculations that can ensure respiration have relatively high accuracy rate, such as Fig. 5 institute
Show.
(4) respiratory rate is calculated
Several breathing peak intervals are obtained from Fig. 5, are then averaged to these respiratory intervalsYiTo exhale
Interval (sampled point expression) is inhaled, n is respiratory intervals sum.If sample frequency is f, then respiratory rate are as follows:Secondary/
Minute.
Piezoceramic transducer acquires multichannel and breathes original signal, best by signal amplification, AD (modulus) sampling, selection
The steps such as signal path, the waveform processing of breath signal (including filtering, signal smoothing, climacteric peak intervals and breathing value calculate)
After rapid, respiratory rate is finally obtained, realizes and the long-time of breathing is monitored under bed state.
The embodiment of the present invention provides a kind of non-contact, unperturbed formula monitoring of respiration method and device suitable for long distance monitoring,
It realizes to the real-time monitoring breathed during human body bed, and provides abnormal auto-alarming function, it can be achieved that being good for house old man
Health and safety custody.
Fig. 8 is the structural schematic diagram of the device for the monitoring of respiration that further embodiment of this invention provides.
Referring to Fig. 8, on the basis of the above embodiments, the device of distribution Physical Cell Identifier provided in this embodiment, institute
Stating device includes receiving module 81, processing module 82 and computing module 83, in which:
Receiving module 81 is used to receive the original signal of pressure sensing band transmission, and the original signal includes what bedding was born
Pressure value；Processing module 82 is used to carry out the original signal simulation conversion number AD sampling processing, obtains breath signal；Meter
Module 83 is calculated to be used to calculate respiratory rate according to the breath signal.
Optionally, the pressure sensing band is set under bedding, and bedding is the device to lie down for human body, such as bed
Pad.
Optionally, the pressure sensing band can be not directly contacted with human body, can also measure to respiratory rate, the present invention
It is illustrated for being set under mattress in embodiment.
Optionally, the pressure sensing band includes at least one pressure sensor (Pressure Transducer), pressure
Sensor is used for the variation of induction pressure, and the variation of pressure is converted into original signal.
Optionally, piezoceramic transducer realization can be used in pressure sensor.
Optionally, when breathing, abdominal cavity can rise and fall people, thereby result in the different pressure values of mattress receiving,
Pressure sensor obtains original signal according to the changing value of pressure.
The original signal that piezoceramic transducer detects is sent to processor by the pressure sensing band, and processor is receiving
, it can be achieved that analysis processing function to original signal after the original signal, and the benchmark of+1.5V is provided for pressure sensor
Voltage.
Optionally, processing module 82 includes operational amplifier and AD (analog to digital, simulation conversion number) mould
Block.
Optionally, since the original signal of pressure sensor acquisition may be very faint, processing need to be amplified, with clear
The waveform of original signal determines the position of wave crest and trough.
Optionally, signal amplification is completed using operational amplifier, it is contemplated that amplification factor is too high to will appear spilling, settable
Amplification factor is 10 times.
Optionally, A/D module carries out AD sampling to the original signal by amplification.
Optionally, original signal belongs to analog signal, and AD sampling is analog signal to be converted into digital signal, then sets
Sample frequency.
Optionally, sample frequency refers to that each second acquires how many a sampled points.
Optionally, several sampled points are selected from digital signal (original signal), sampling is constituted by the sampled point selected
Signal.
Optionally, under conditions of meeting sampling thheorem, it is contemplated that data space and computation complexity, the present invention are real
It applies example and sample frequency is set as 100Hz (1s acquires 100 sampled points).
Optionally, sampling thheorem illustrates the relationship between sample frequency and digital signal, is the base of continuous signal discretization
This foundation.Sampling thheorem is when sample frequency is greater than 2 times of highest frequency in digital signal, and sampled signal completely remains
Information in digital signal.
Optionally, the original signal of pressure sensor acquisition may contain noise, can carry out denoising to sampled signal,
To obtain the breath signal of reflection heartbeat.
As shown in Fig. 2, breath signal describes the voltage change of each sampled point at any time.Abscissa is of sampled point
Number, ordinate is voltage (v), and the unit that pressure sensor directly detects is mv, after operational amplifier amplifies, unit
For v.
Optionally, 1s acquires 100 sampled points, and computing module 83 is with the sampled point (60*100) of acquisition in 1 minute for one
A unit checks that how many wave crest in each unit, a wave crest are denoted as respiration, and each minute respiratory rate is one
The number of a unit medium wave peak.
Using the pressure sensing band of the embodiment of the present invention, the pressure value born by pressure sensing band detection bedding, rather than
Directly contact human body, therefore in the case that not to human body generate constraint detect, obtain original signal, by processing module 82 into
The further signal processing of row, computing module 83 finally obtain respiratory rate, realize under natural sleep state to human health
Long-time monitoring.
Using the pressure value of the device detection bedding of monitoring of respiration, original signal can be obtained, the device of monitoring of respiration
Cost is relatively low, easy to use.
The device of monitoring of respiration provided in this embodiment can be used for executing the method for above method embodiment, this implementation is not
It repeats again.
The device of monitoring of respiration provided in this embodiment carries what bedding was born by what reception pressure sensing band was sent
The original signal of pressure value can carry out the acquisition of original signal in the case where not contacting human body, and computing module is according to original letter
Number respiratory rate is calculated, thus economical and easily carry out monitoring of respiration.
Fig. 9 shows the structural schematic diagram of a kind of electronic equipment of further embodiment of this invention offer.
Refering to Fig. 9, electronic equipment provided in an embodiment of the present invention, the electronic equipment include memory (memory) 91,
Processor (processor) 92, bus 93 and it is stored in the computer program that can be run on memory 91 and on a processor.
Wherein, the memory 91, processor 92 complete mutual communication by the bus 93.
The processor 92 is used to call the program instruction in the memory 91, realizes when executing described program as schemed
1 method.
In another embodiment, following method is realized when the processor executes described program:
The original signal includes that breath signal and heartbeat signal correspondingly carry out simulation conversion to the original signal
Digital AD sampling processing, the step of obtaining breath signal specifically:
Bandpass filtering is carried out to the original signal, heartbeat signal is eliminated, obtains the breath signal.
In another embodiment, following method is realized when the processor executes described program: the pressure sensing
Band includes multiple pressure sensors, and the pressure value that a region of each pressure sensor detection bedding is born, correspondence obtains one
A original signal；Correspondingly, the step of simulation conversion number AD sampling processing being carried out to the original signal, obtaining breath signal
Specifically:
Processor calculates the energy of each original signal according to multiple original signals；
According to the maximum original signal of energy in original signal, AD sampling processing is carried out, the breath signal is obtained.
In another embodiment, realize following method when the processor executes described program: processor is according to institute
The step of stating breath signal, calculating respiratory rate specifically:
According to the position of the adjacent peaks of the breath signal, the interval of adjacent peaks is calculated:
According to multiple intervals, average respiratory intervals are obtained；
According to average respiratory intervals and preset sample frequency, respiratory rate is obtained.
In another embodiment, following method is realized when the processor executes described program: according to the breathing
The position of the adjacent peaks of signal, before the step of calculating the interval of adjacent peaks, the method also includes:
The voltage value for remembering current sampling point is curData, and the voltage value of the previous sampled point of current sampling point is
PreData, the voltage value of next sampled point of current sampling point are nextData；
If curData-preData > 0 and curData-nextData > 0 primarily determine current sampling point for wave crest
Position.
In another embodiment, following method: two adjacent peaks is realized when the processor executes described program
Correspondingly current sampling point is primarily determined as wave including the lesser sampled point of voltage value and the biggish sampled point of voltage value
After the step of position at peak, the method also includes:
If the interval of adjacent peaks is less than first threshold, using the biggish sampled point of voltage value as wave crest；
And/or
If peak parameters are less than second threshold, using the biggish sampled point of voltage value as wave crest；
The peak parameters λ is calculated according to the following formula:
λ=(smallPeak-Valley)/(largePeak-Valley)
In formula, smallPeak is the voltage value of the lesser sampled point of voltage value in two adjacent peaks, and largePeak is
The voltage value of the biggish sampled point of voltage value, Valley are the voltage value of the smallest sampled point between two adjacent peaks.
In another embodiment, realize following method when the processor executes described program: processor is according to institute
After the step of stating breath signal, calculating respiratory rate, the method also includes:
When the respiratory rate is lower than lower limit or is more than the upper limit, alarm information is sent to remote equipment.
Electronic equipment provided in this embodiment can be used for executing the corresponding program of method of above method embodiment, this reality
It applies and repeats no more.
Electronic equipment provided in this embodiment is realized when executing described program by the processor and receives pressure sensing band
What is sent carries the original signal of the pressure value of bedding receiving, and obtains respiratory rate according to original signal, can not contact
The acquisition of original signal is carried out in the case where human body, thus economical and easily carry out monitoring of respiration.
A kind of storage medium that further embodiment of this invention provides is stored with computer program on the storage medium, institute
It states and realizes when program is executed by processor such as the step of Fig. 1.
In another embodiment, following method is realized when described program is executed by processor:
The original signal includes that breath signal and heartbeat signal correspondingly carry out simulation conversion to the original signal
Digital AD sampling processing, the step of obtaining breath signal specifically:
Bandpass filtering is carried out to the original signal, heartbeat signal is eliminated, obtains the breath signal.
In another embodiment, following method is realized when described program is executed by processor:
The pressure sensing band includes multiple pressure sensors, and a region of each pressure sensor detection bedding is born
Pressure value, correspondence obtain an original signal；Correspondingly, the original signal is carried out at simulation conversion number AD sampling
The step of managing, obtaining breath signal specifically:
Processor calculates the energy of each original signal according to multiple original signals；
According to the maximum original signal of energy in original signal, AD sampling processing is carried out, the breath signal is obtained.
In another embodiment, following method is realized when described program is executed by processor:
Processor is according to the breath signal, the step of calculating respiratory rate specifically:
According to the position of the adjacent peaks of the breath signal, the interval of adjacent peaks is calculated:
According to multiple intervals, average respiratory intervals are obtained；
According to average respiratory intervals and preset sample frequency, respiratory rate is obtained.
In another embodiment, following method is realized when described program is executed by processor:
According to the position of the adjacent peaks of the breath signal, before the step of calculating the interval of adjacent peaks, the side
Method further include:
The voltage value for remembering current sampling point is curData, and the voltage value of the previous sampled point of current sampling point is
PreData, the voltage value of next sampled point of current sampling point are nextData；
If curData-preData > 0 and curData-nextData > 0 primarily determine current sampling point for wave crest
Position.
In another embodiment, following method is realized when described program is executed by processor:
Two adjacent peaks include that the lesser sampled point of voltage value and the biggish sampled point of voltage value will correspondingly work as
After the step of position that preceding sampled point primarily determines as wave crest, the method also includes:
If the interval of adjacent peaks is less than first threshold, using the biggish sampled point of voltage value as wave crest；
And/or
If peak parameters are less than second threshold, using the biggish sampled point of voltage value as wave crest；
The peak parameters λ is calculated according to the following formula:
λ=(smallPeak-Valley)/(largePeak-Valley)
In formula, smallPeak is the voltage value of the lesser sampled point of voltage value in two adjacent peaks, and largePeak is
The voltage value of the biggish sampled point of voltage value, Valley are the voltage value of the smallest sampled point between two adjacent peaks.
In another embodiment, following method is realized when described program is executed by processor:
Processor is according to the breath signal, after the step of calculating respiratory rate, the method also includes:
When the respiratory rate is lower than lower limit or is more than the upper limit, alarm information is sent to remote equipment.
Storage medium provided in this embodiment realizes the side of above method embodiment when described program is executed by processor
Method, this implementation repeat no more.
Storage medium provided in this embodiment, the pressure value for carrying bedding receiving sent by receiving pressure sensing band
Original signal, and respiratory rate is obtained according to original signal, adopting for original signal can be carried out in the case where not contacting human body
Collection, thus economic and easily carry out monitoring of respiration.
Further embodiment of this invention discloses a kind of computer program product, and the computer program product is non-including being stored in
Computer program in transitory computer readable storage medium, the computer program include program instruction, when described program refers to
When order is computer-executed, computer is able to carry out method provided by above-mentioned each method embodiment, for example,
The original signal that pressure sensing band is sent is received, the original signal includes the pressure value that bedding is born；
Simulation conversion number AD sampling processing is carried out to the original signal, obtains breath signal；
According to the breath signal, respiratory rate is calculated.
It will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments is wrapped
Certain features for including rather than other feature, but the combination of the feature of different embodiments mean in the scope of the present invention it
It is interior and form different embodiments.
It will be understood by those skilled in the art that each step in embodiment can be implemented in hardware, or at one or
The software module run on the multiple processors of person is realized, or is implemented in a combination thereof.Those skilled in the art should manage
Solution, can be used in practice microprocessor or digital signal processor (DSP) to realize according to an embodiment of the present invention one
The some or all functions of a little or whole components.The present invention is also implemented as executing method as described herein
Some or all device or device programs (for example, computer program and computer program product).
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (10)
1. a kind of method of monitoring of respiration, which is characterized in that the described method includes:
The original signal that pressure sensing band is sent is received, the original signal includes the pressure value that bedding is born；
Simulation conversion number AD sampling processing is carried out to the original signal, obtains breath signal；
According to the breath signal, respiratory rate is calculated.
2. according to the method described in claim 1, it is characterized by: the original signal includes breath signal and heartbeat signal,
Correspondingly, the step of simulation conversion number AD sampling processing being carried out to the original signal, obtaining breath signal specifically:
Bandpass filtering is carried out to the original signal, heartbeat signal is eliminated, obtains the breath signal.
3. according to the method described in claim 1, it is characterized by: the pressure sensing band includes multiple pressure sensors, often
One pressure sensor detects the pressure value that a region of bedding is born, and correspondence obtains an original signal；Correspondingly, to described
The step of original signal carries out simulation conversion number AD sampling processing, obtains breath signal specifically:
Processor calculates the energy of each original signal according to multiple original signals；
According to the maximum original signal of energy in original signal, AD sampling processing is carried out, the breath signal is obtained.
4. according to the method described in claim 1, it is characterized by: processor calculates respiratory rate according to the breath signal
The step of specifically:
According to the position of the adjacent peaks of the breath signal, the interval of adjacent peaks is calculated:
According to multiple intervals, average respiratory intervals are obtained；
According to average respiratory intervals and preset sample frequency, respiratory rate is obtained.
5. according to the method described in claim 4, it is characterized by: being counted according to the position of the adjacent peaks of the breath signal
Before the step of calculating the interval of adjacent peaks, the method also includes:
The voltage value for remembering current sampling point is curData, and the voltage value of the previous sampled point of current sampling point is preData,
The voltage value of next sampled point of current sampling point is nextData；
If curData-preData > 0 and curData-nextData > 0, current sampling point is primarily determined into the position for wave crest
It sets.
6. according to the method described in claim 5, it is characterized by: two adjacent peaks include the lesser sampled point of voltage value with
And the biggish sampled point of voltage value, correspondingly, after the step of current sampling point is primarily determined the position for wave crest, the side
Method further include:
If the interval of adjacent peaks is less than first threshold, using the biggish sampled point of voltage value as wave crest；
And/or
If peak parameters are less than second threshold, using the biggish sampled point of voltage value as wave crest；
The peak parameters λ is calculated according to the following formula:
λ=(smallPeak-Valley)/(largePeak-Valley)
In formula, smallPeak is the voltage value of the lesser sampled point of voltage value in two adjacent peaks, and largePeak is voltage
It is worth the voltage value of biggish sampled point, Valley is the voltage value of the smallest sampled point between two adjacent peaks.
7. according to the method described in claim 1, it is characterized by: processor calculates respiratory rate according to the breath signal
The step of after, the method also includes:
When the respiratory rate is lower than lower limit or is more than the upper limit, alarm information is sent to remote equipment.
8. a kind of device of monitoring of respiration, which is characterized in that described device includes:
Receiving module, for receiving the original signal of pressure sensing band transmission, the original signal includes the pressure that bedding is born
Value；
Processing module obtains breath signal for carrying out simulation conversion number AD sampling processing to the original signal；
Computing module, for calculating respiratory rate according to the breath signal.
9. a kind of electronic equipment, which is characterized in that on a memory and can be including memory, processor, bus and storage
The computer program run on processor, the processor are realized when executing described program such as claim 1-7 any one
Step.
10. a kind of storage medium, is stored thereon with computer program, it is characterised in that: real when described program is executed by processor
Now such as the step of claim 1-7 any one.
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