CN103006225A - Sleep monitoring instrument capable of monitoring breathing state in sleep - Google Patents
Sleep monitoring instrument capable of monitoring breathing state in sleep Download PDFInfo
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- CN103006225A CN103006225A CN2013100104063A CN201310010406A CN103006225A CN 103006225 A CN103006225 A CN 103006225A CN 2013100104063 A CN2013100104063 A CN 2013100104063A CN 201310010406 A CN201310010406 A CN 201310010406A CN 103006225 A CN103006225 A CN 103006225A
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Abstract
The invention discloses a sleep monitoring instrument capable of monitoring breathing state in sleep. The sleep monitoring instrument comprises a sleep monitor and a mobile terminal, wherein the sleep monitor comprises a monitor power source, a radar signal transceiver and a heartbeat and breath displayer, a processing signal output by the radar signal transceiver enters the heartbeat and breath displayer, heart rate and breath information is processed in a display processing unit to generate waveforms, the breath and heartbeat waveforms enter a first display output unit to be displayed, the display processing unit is used for transmitting the heartbeat and breath information outwards via a first wireless communication unit, the mobile terminal comprising a mobile terminal power source and a sleep analyzer receives breath and heartbeat signals transmitted by the sleep monitor via a second wireless communication unit in the sleep analyzer, and transmits the breath and heartbeat signals to the sleep analyzer to be analyzed and then to be displayed via a second display output unit. The sleep monitoring instrument capable of monitoring the breathing state in sleep is simple in structure, low in cost, small in size, few in radiation, high in precision of monitoring result, wide in application range and the like.
Description
Technical field
The present invention relates generally to human body physical sign monitoring field, refers in particular to a kind of hypnotic instrument of monitoring sleep breathing state.
Background technology
Breath signal and electrocardiosignal are the most important vital signss of human body.For the patient that sleep apnea is arranged, the perhaps just baby of birth, and some suffers from the patient of respiratory system disease, heart disease, needs its breathing and Heartbeat State between sleep period of Real-Time Monitoring.In addition, for some the people of sleep disorder is arranged, wish to learn sleep duration every night, be used for the condition of monitoring oneself.
" doppler radar sensor " research in the vital sign monitoring has had long history with application, radar sensor can directly not contact under the situation of human body, know the vital sign parameter signals of human body, this type of technology is often used for rescuing life and searches and rescues detecting devices, such as life-detection instrument, through-wall radar.The power of this type of radar is larger, and investigative range is large, but larger for the radiation of human body.Existing Radar Technology size is larger, can't be applied directly to the monitoring of respiration of family or hospital internal.And always also not overripened for the signal processing algorithm of analyzing respiratory frequency and heart rate, successful application is not yet arranged.
Summary of the invention
The technical problem to be solved in the present invention just is: for the technical problem that prior art exists, the invention provides a kind of simple and compact for structure, with low cost, volume is little, radiation is little, the monitoring result precision high, the hypnotic instrument of monitoring sleep breathing state applied widely.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of hypnotic instrument of monitoring sleep breathing state comprises: sleep monitor device and portable terminal, described sleep monitor device comprise monitor power supply, radar signal transceiver and heart beating breathing display;
Described radar signal transceiver comprises voltage controlled oscillator, transmitting antenna, reception antenna, frequency mixer and baseband chip, and described voltage controlled oscillator is used for producing pulse signal and is sent to transmitting antenna, and described transmitting antenna is used for to the monitoring objective transmitted signal; Described reception antenna is used for receiving the echo that monitoring objective reflects and sends into frequency mixer, and the pulse signal that then produces with voltage controlled oscillator carries out mixing; Described baseband chip is used for the signal after the mixing is carried out exporting processing signals behind respiratory frequency calculating, heart rate calculating and the apnea monitoring;
Described heart beating is breathed display and is comprised that the first wireless communication unit, display processing unit, first show output unit, the processing signals of described baseband chip output enters heart beating and breathes display, the processing of carrying out heart rate information and respiration information in described display processing unit produces display waveform, breathing and heartbeat waveform enter in described the first demonstration output unit and show that described display processing unit is used for heart beating and respiration information are outwards sent by the first wireless communication unit;
Described portable terminal comprises portable terminal power supply and sleep analysis device, described sleep analysis device comprises that the second wireless communication unit, sleep analysis unit and second show output unit, described portable terminal receives breathing and the heartbeat signal that the sleep monitor device sends by the second wireless communication unit, and will breathe and heartbeat signal is sent into the sleep analysis unit and carried out sleep analysis, enter at last second and show that output unit shows.
As a further improvement on the present invention:
Described the first wireless communication unit and the second wireless communication unit adopt the WIFI unit.
Described portable terminal adopts smart mobile phone or PAD.
The present invention also comprises network interface, by the network interface accessing Internet.
The LNA of described reception antenna through linking to each other successively, link to each other with frequency mixer by behind the second amplifier and the two-stage amplifier that the 3rd amplifier forms.
Described voltage controlled oscillator links to each other with transmitting antenna through the first amplifier.
Compared with prior art, the invention has the advantages that: the hypnotic instrument of monitoring sleep breathing state of the present invention, simple and compact for structure, with low cost, volume is little, radiation is little, the monitoring result precision is high, applied widely, it adopts breathing and the heartbeat message of radar sensor monitoring people in the sleep period, and carry out asphyxia analysis and the piecewise analysis of when sleep, the health status of people when the sleep monitored; And the present invention in use with human body without directly contacting, accepted by patient and baby and use easilier.
Description of drawings
Fig. 1 is structural principle sketch map of the present invention.
Fig. 2 is the schematic flow sheet of the frequency domain rate algorithm for estimating that adopts in the baseband chip of the present invention.
Fig. 3 is the schematic flow sheet of the time domain rate algorithm for estimating that adopts in the baseband chip of the present invention.
Fig. 4 is the schematic flow sheet of the regular respiratory sex determination method that adopts in the baseband chip of the present invention.
Fig. 5 is the schematic flow sheet of the sleep state analytical method that adopts in the sleep analysis of the present invention unit.
The specific embodiment
Below with reference to Figure of description and specific embodiment the present invention is described in further details.
As shown in Figure 1, the hypnotic instrument of monitoring sleep breathing state of the present invention comprises sleep monitor device 1 and portable terminal 2; Sleep monitor device 1 comprises monitor power supply 5, radar signal transceiver 3 and heart beating breathing display 4, and radar signal transceiver 3 comprises voltage controlled oscillator (VCO) 6, the first amplifier 7, transmitting antenna 8, reception antenna 9, LNA 10, the second amplifier 11, the 3rd amplifier 12, frequency mixer 13 and baseband chip 14.Voltage controlled oscillator 6 is used for producing the 5GHz pulse signal, by being sent to transmitting antenna 8 behind the first amplifier 7, transmitting antenna 8 is used for sending radar signal to monitoring objective, reception antenna 9 is used for receiving the echo that monitoring objective reflects, and through carrying out the two-stage amplification by the second amplifier 11 and the 3rd amplifier 12 behind the LNA 10 removal noises, then send into frequency mixer 13, the pulse signal that produces with voltage controlled oscillator 6 carries out mixing.Signal after the mixing enters baseband chip 14 and removes noise, breath signal detection and heartbeat signal detection, and carries out respiratory frequency and calculate, and heart rate calculates and apnea monitoring.
Heart beating is breathed display 4 and is comprised that the first wireless communication unit 17, display processing unit 16, first show output unit 15.The signal of baseband chip 14 outputs enters heart beating and breathes display 4, and the processing of carrying out heart rate information and respiration information in display processing unit 16 produces display waveform, and breathing and heartbeat waveform enter first and show that output unit 15 shows.Simultaneously, display processing unit 16 can outwards send heart beating and respiration information by the first wireless communication unit 17.
In the present embodiment, the first wireless communication unit 17 and the second wireless communication unit 20 adopt the WIFI unit.
In the present embodiment, portable terminal 2 adopts smart mobile phone or PAD.
In the present embodiment, radar signal transceiver 3 adopts small-sized pcb board design, and each building block is integrated on the small-sized pcb board.
In the present embodiment, heart beating is breathed display 4 and is adopted small display screen, to reach the little effect of volume.
Further, hypnotic instrument of the present invention also is provided with network interface, and by the network interface accessing Internet, and the data when hypnotic instrument worked send to the server at specialist system place.
The workflow of hypnotic instrument of the present invention is: 1. start hypnotic instrument, hypnotic instrument begins the automatic searching monitoring objective.2. behind the locking monitoring objective, carry out respiratory frequency calculating and heart rate and calculate, and record respiratory curve and heart rate curve, launch heartbeat message and the respiration information that obtains by WIFI, and show respiratory frequency and palmic rates by demonstration output unit 18.3. start the hypnotic instrument application software on the portable terminal 2, automatically connect sleep monitor device 1 by WIFI, and show heart rate and respiratory frequency information.4. the sleep analysis on the flicking portable terminal 2 provides sleep state information, comprise sleeping constantly, wake up constantly, sleep duration, the shallow duration of sleeping, sound sleep duration, sleep apnea number of times and average heart rate and average respiratory rate.5. the setting on the flicking portable terminal 2 can arrange the hypnotic instrument parameter, can start or close hypnotic instrument.6. " the uploading data to specialist system " on the flicking portable terminal 2 can be crossed data communication device the server that the Internet sends to the specialist system place.
Hypnotic instrument of the present invention can be used for the sleep-respiratory Real-Time Monitoring of family, comprises baby monitor, the patient's of heart disease or respiratory system disease monitoring of respiration is arranged, anergy old man's monitoring of respiration, and report to the police when serious respiratory disorder occurs; The present invention also can be used for the ordinary people or have the people of sleep disorder to carry out sleep monitor, is used for duration and the sleep quality of monitoring sleep; The present invention can also be used for the sleep breath monitoring of the block type patients with sleep apnea in the hospital, heart patient's sleep breath monitoring, and other need to carry out the occasion of monitoring of respiration.The present invention adopts contactless mode to carry out monitoring of respiration, satisfies patient and feels comfortable, and not bound hommization demand has very strong practical value.
As shown in Figure 2, be the frequency domain rate algorithm for estimating of carrying out in the baseband chip 14 of the present invention, be used at frequency-domain calculations respiratory frequency and heart rate.The step of this frequency domain rate algorithm for estimating is as follows:
1. get M the sample (M=2880 or other) of data after demodulating X; This M sample has comprised non-respiratory movement and other Noise and Interference signals;
2. all intervals with all the non-breath signals among the data X and interfering signal are made as zero;
3. the every number among the data X is deducted the average of X;
4. the respiratory frequency in the frequency domain is following determines:
A) all samples for X carry out Fourier transform (DFT), do not make window, zero padding and interpolation algorithm;
B) the frequency domain rate estimates it is the frequency that has maximum amplitude among the X.In some implementation, it can be the frequency of a maximum amplitude between minimum respiratory frequency 6 and maximum breathing frequency 48.
As shown in Figure 3, be the time domain rate algorithm for estimating of the respiratory frequency carried out in the baseband chip 14 of the present invention.The step of this time domain rate algorithm for estimating is as follows:
1. get M the sample (M=2880 or other) of data after demodulating X; This M sample has comprised non-respiratory movement and other Noise and Interference signals;
2. all intervals with all the non-breath signals among the data X and interfering signal are made as zero;
3. the every number among the data X is deducted the average of X;
4. the rate of time domain is estimated as follows definite:
A) make u
iBe the index of sample, so that x ［ u
i］≤0 and x[u
I+1] 0 (zero crossing);
B) make a
i［ u
i, u
I+1Interval interior maximum amplitude;
C) make A=max(a
i), then there are three different several i, j, k is so that a
i0.1A, a
j0.1A, a
k0.1A;
D) if in step c), there is not A, then can't determine respiratory frequency;
E) otherwise remember that breathing cycle 1 is interval ［ u
i, u
I+1, g
i=1 satisfies following condition:
i.a
i>0.1A
Ii.y (n)=1 is for u
i＜n＜u
I+1
Iii.z (n)=1 is for u
i＜n＜u
I+1
Wherein y (n) and z (n) are respectively motion window and crop window;
F) otherwise, g
i=0;
G) make that λ is g
iThe maximum number of=1 continuous breathing;
If respiratory frequency can't be determined so in λ＜2, otherwise respiratory frequency is (60 * 100 * λ)/((u
I+ λ-u
i).
Hypnotic instrument of the present invention all carries out according to the estimation of frequency domain rate and the time domain rate algorithm for estimating of Fig. 2 and Fig. 3 the estimation of respiratory frequency and the estimation of heart rate, shows that at last the respiratory frequency that provides is the average that the frequency domain respiratory frequency is estimated and the time domain respiratory frequency is estimated; If the frequency domain valuation of respiratory frequency and time domain valuation difference then provide the information of reporting an error greater than 4; Otherwise show that the frequency domain valuation is as respiratory frequency; The account form of heart rate is: if the difference that the frequency domain of heart rate is estimated and time domain is estimated then provides the information of reporting an error greater than 12; Otherwise with the frequency domain valuation of heart rate as heart rate.
As shown in Figure 4, the regular respiratory sex determination method for carrying out in the baseband chip of the present invention.This regular respiratory sex determination method is comprised of following step:
1. get M breath signal, the M value is 50～100; Calculate average and the standard variance of breathing-its respiratory intervals;
2. calculate average and the standard variance of respiratory depth of each breathing of M breath signal;
3. calculate the covariance C1 of breathing-its respiratory intervals; And the covariance C2 of calculating respiratory depth;
4. if C1＜threshold value and C2＜threshold value are then judged to breathe and are breathed as rule;
5. if condition 4 is false, then be judged to be irregular breathing; Breathing-its respiratory intervals and respiratory depth are carried out the FFT conversion, check in the waveform whether have periodical element;
6. do not exist periodically if breathe, it is individual to 2M then to increase the sample of breathing again, and returns step 2 and processes; If 2M pattern detection then is judged to be the breathing aperiodicity less than periodically, calculates the average respiratory rate in the gamut, and calculate the average of apnea;
7. if the cycle is regular, calculate the asphyxia length in per cycle, and average, draw the average asphyxia length in per cycle;
8. the data of calculating are shown.If regular respiratory provides the indication of " regular respiratory-X time breaths/min ", if irregular respiration, indication " periodically-irregular ".If there is asphyxia, then indication " average asphyxia length Y "; If irregular respiration, then indication " Z asphyxia/minute ".
As shown in Figure 5, be the sleep state parser in the sleep analysis of the present invention unit 19.The step of sleep state parser is as follows:
Time interval t, t+delta_t] in, in meeting the following conditions one:
A) can't detect cardiopulmonary exercise;
B) non-cardiopulmonary exercise signal is greater than the cardiopulmonary exercise signal;
If 2. satisfy in the step 1 condition a) or b), then labelling [t, t+delta_t] is the clear-headed period;
Otherwise, in time interval ［ t, t+delta_t ］, meet the following conditions:
A) average cardiopulmonary exercise signal is greater than non-cardiopulmonary exercise signal;
B) non-cardiopulmonary exercise signal number of times is greater than 1 time;
If 4. satisfy step 3 conditional a) and condition b), then labelling [t, t+delta_t] is the shallow period of sleeping;
5. in time interval ［ t, t+delta_t ］, satisfy following condition: the serious asphyxia of regular respiratory and nothing;
6. if satisfy the condition in the step 5, then labelling [t, t+delta_t] is the sound sleep period; Otherwise report to the police;
7.t=t+delta_t; Enter step 1;
If the continuous clear-headed period surpasses 10, then represent the end of one section sleep.The result that sleeps statistics, algorithm finishes.
Below only be preferred implementation of the present invention, protection scope of the present invention also not only is confined to above-described embodiment, and all technical schemes that belongs under the thinking of the present invention all belong to protection scope of the present invention.Should be pointed out that for those skilled in the art the some improvements and modifications not breaking away under the principle of the invention prerequisite should be considered as protection scope of the present invention.
Claims (6)
1. the hypnotic instrument of a monitoring sleep breathing state, it is characterized in that, comprise: sleep monitor device (1) and portable terminal (2), described sleep monitor device (1) comprise monitor power supply (5), radar signal transceiver (3) and heart beating breathing display (4);
Described radar signal transceiver (3) comprises voltage controlled oscillator (6), transmitting antenna (8), reception antenna (9), frequency mixer (13) and baseband chip (14), described voltage controlled oscillator (6) is used for producing pulse signal and is sent to transmitting antenna (8), and described transmitting antenna (8) is used for to the monitoring objective transmitted signal; Described reception antenna (9) is used for receiving the echo that monitoring objective reflects and sends into frequency mixer (13), and the pulse signal that then produces with voltage controlled oscillator (6) carries out mixing; Described baseband chip (14) is used for the signal after the mixing is carried out exporting processing signals behind respiratory frequency calculating, heart rate calculating and the apnea monitoring;
Described heart beating is breathed display (4) and is comprised the first wireless communication unit (17), display processing unit (16), first shows output unit (15), the processing signals of described baseband chip (14) output enters heart beating and breathes display (4), the processing of carrying out heart rate information and respiration information in described display processing unit (16) produces display waveform, breathing and heartbeat waveform enter in described the first demonstration output unit (15) and show, described display processing unit (16) is used for heart beating and respiration information are outwards sent by the first wireless communication unit (17);
Described portable terminal (2) comprises portable terminal power supply (21) and sleep analysis device (22), described sleep analysis device (22) comprises that the second wireless communication unit (20), sleep analysis unit (19) and second show output unit (18), described portable terminal (2) receives breathing and the heartbeat signal that sleep monitor device (1) sends by the second wireless communication unit (20), and will breathe and heartbeat signal is sent into sleep analysis unit (19) and carried out sleep analysis, enter at last second and show that output unit (18) shows.
2. the hypnotic instrument of monitoring sleep breathing state according to claim 1 is characterized in that, described the first wireless communication unit (17) and the second wireless communication unit (20) adopt the WIFI unit.
3. the hypnotic instrument of monitoring sleep breathing state according to claim 1 is characterized in that, described portable terminal (2) adopts smart mobile phone or PAD.
4. the hypnotic instrument of monitoring sleep breathing state according to claim 1 is characterized in that, also comprises network interface, by the network interface accessing Internet.
5. the hypnotic instrument of monitoring sleep breathing state according to claim 1, it is characterized in that, the LNA (10) of described reception antenna (9) through linking to each other successively, link to each other with frequency mixer (13) by behind the second amplifier (11) and the two-stage amplifier that the 3rd amplifier (12) forms.
6. the hypnotic instrument of monitoring sleep breathing state according to claim 1 is characterized in that, described voltage controlled oscillator (6) links to each other with transmitting antenna (8) through the first amplifier (7).
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| CN104905779A (en) * | 2015-06-09 | 2015-09-16 | 惠州Tcl移动通信有限公司 | Method and system for sleep reminding based on mobile terminal and mobile terminal |
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| CN106725488B (en) * | 2016-12-27 | 2023-08-18 | 深圳大学 | Wireless field intensity respiration detection method and device and respiration detector |
| CN107049283A (en) * | 2017-06-02 | 2017-08-18 | 南京理工大学 | A kind of sleep apnea detection method based on adaptive residual error comparison algorithm |
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