CN108888249A - A kind of method and device of the more people's vital sign monitorings of contactless car - Google Patents
A kind of method and device of the more people's vital sign monitorings of contactless car Download PDFInfo
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- CN108888249A CN108888249A CN201810579678.8A CN201810579678A CN108888249A CN 108888249 A CN108888249 A CN 108888249A CN 201810579678 A CN201810579678 A CN 201810579678A CN 108888249 A CN108888249 A CN 108888249A
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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
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
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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
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
-
- 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
-
- 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
- A61B5/6893—Cars
-
- 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
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
- A61B5/7207—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal of noise induced by motion artifacts
-
- 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
- A61B5/7235—Details of waveform analysis
Abstract
The present invention realizes that the device of the more people's vital sign monitorings of contactless car contains and obtains module, processing module and detection module.Pulse ultra-broad band radar is placed in interior acquisition somatic data in obtaining module；Fixed range and reflective surface area of the processing module based on radar to each seat, radar signal are divided into different apart from section, and human body body movement signal is extracted from each section and therefrom decomposites the different frequency signals of respective number using VMD algorithm；Aiming at the problem that interior more people's signal aliasings, the aliasing based on correlation removal short distance position human body respiration heartbeat signal in remote position interferes detection module, while obtaining more people and breathing palmic rates.The present invention can contactlessly obtain interior more people's vital sign parameter signals by vehicle-mounted pulse ultra-broad band radar and carry out effective monitoring simultaneously.Compared with prior art, the present invention has many advantages, such as that low-power consumption, contactless, privacy is good.
Description
Technical field
The invention belongs to occupant's monitor of life state fields, are related to a kind of more people's vital sign monitorings of contactless car
Method and apparatus, pass through the contactless monitoring that vehicle-mounted pulse ultra-broad band radar realizes interior more people's vital signs.
Background technique
In order to guarantee vehicle driving safety, driver fatigue state monitoring is had received widespread attention.Has the side of being placed at present
The contacts such as touch micro photo electric measuring instrument and electrocardio electronic chip on disk monitor system, pass through driver contact side
The vital sign parameter signals of driver are obtained to disk；Also there is the monitoring contactless based on camera or photoplethysmography etc.
System.In vehicle travel process, other than driver status, the monitor of life state of interior occupant is also most important.
Long-term real-time monitoring is carried out to the vital sign of the interior occupant including driver, is conducive to monitor the meaning such as burst disease
Outer situation ensures the life security in driving procedure.It is present that existing occupant's life sign monitor system mainly passes through installation
Touch sensor and contactless image optics plethysmograph in chair obtain vital sign, however are mounted on seat
In sensor cannot efficiently differentiate occupant and object, expend sensor and face the threat of circuit damage；And it is non-contact
Formula image optics plethysmograph then needs percutaneous exposed region to be imaged, and detection range is by light and clothing
The limitation that object and seat block.Pulse ultra-broad band radar has strong penetrability as a kind of contactless monitoring mode, can
It penetrates clothing etc. to block, can also take seated user and object separately by signal effective district, realize and the vital sign of more people is monitored.And
In a car medium-sized and below, the covering and the monitoring of more people's vital signs of whole vehicle is can be completed in single radar, is had
The advantages that low-power consumption, good Privacy Safeguarding.
Summary of the invention
In view of the above-mentioned problems, the embodiment of the present invention provide a kind of method that the more people's vital signs of contactless car monitor and
Device carries out vital sign monitoring to interior driver and occupant using vehicle-mounted pulse ultra-broad band radar, specifically includes and exhale
Inhale palmic rate monitoring.
The embodiment of the invention provides a kind of methods of contactless more people's vital sign monitorings of car, including：
Pulse ultra-broad band radar is placed in interior acquisition somatic data；
Radar return signal is divided into different apart from section, human body body movement signal is extracted from each section and is used
VMD (Variational Mode Decomposition, variation mode decomposition) algorithm therefrom decomposites the difference of respective number
Frequency signal；
Aiming at the problem that interior more people's signal aliasings, short distance position human body is removed based on correlation in remote position
The aliasing interference of heartbeat signal is breathed, while obtaining more people and breathing palmic rate.
Optionally, pulse ultra-broad band radar is placed in interior acquisition somatic data, including：
Interior data are acquired in real time using pulse ultra-broad band radar, and by the independent received radar signal group of multirow
Radar signal matrix is synthesized, is stored and is judged；
DC component, bandpass filtering are removed to the radar signal matrix received and based on SVD (Singular
Value Decomposition, singular value decomposition) method goes the Signal Pretreatment of noise wave removing to operate.
Optionally, radar return signal is divided into different apart from section, the dynamic letter of extraction body from each section
Number and the different frequency signals of respective number are therefrom decomposited using VMD algorithm, including：
According to the stationary distribution of the placement position of radar and interior seat, based on the distance between radar to each seat
With the invariance of reflective surface area, position interval division is carried out to signal；
From each position section of radar matrix, energy maximum is found out to the position section of each known someone, with
Extract the human body body movement signal comprising human body vital sign；
VMD algorithm is used to the human body body movement signal that each position section extracts respectively, is believed according to human body vital sign
Frequency domain characteristic number inherently is broken down into IMF (Intrinsic Mode Function, the natural mode of vibration that number determines
Function) component, and increase the number for decomposing IMF component in remote position；
Obtained IMF component signal will be decomposed and pass through FFT (Fast Fourier Transformation, fast Fourier
Transformation) it is mapped to frequency domain, and according to human body respiration frequency range per minute between 10 times to 30 times, palmic rate range is every
Between minute 50 times to 130 times, IMF component of the selecting frequency in effective range.
Optionally, aiming at the problem that interior more people's signal aliasings, in remote position closely based on correlation removal
The aliasing of position human body respiration heartbeat signal interferes, while obtaining more people and breathing palmic rate, including：
Using the breathing palmic rate of the effective frequency extracted from nearest position section human body from the position；
For the interference problem of interior more people's signal aliasings, on the breathing palmic rate basis for obtaining short distance position human body
On, by IMF of the frequency decomposited in the human body body movement signal of its corresponding time-domain signal and follow-up location in effective range
The time-domain signal of component calculates correlation, and the IMF component that correlation in follow-up location is greater than certain threshold value is removed, to obtain
Thus the true breathing heartbeat signal of human body on follow-up location avoids the interference problem of interior more people's signal aliasings, obtains simultaneously
More people breathe palmic rate.
Correspondingly, the embodiment of the invention also provides a kind of device of contactless more people's vital sign monitorings of car, packets
It includes：
Module is obtained, for pulse ultra-broad band radar to be placed in interior acquisition somatic data；
Processing module, it is different apart from section for radar return signal to be divided into, human body is extracted from each section
Body movement signal and the different frequency signals that respective number is therefrom decomposited using VMD algorithm；
Detection module, for being removed in remote position based on correlation aiming at the problem that interior more people's signal aliasings
The aliasing of short distance position human body respiration heartbeat signal interferes, while obtaining more people and breathing palmic rate.
Optionally, module is obtained to be also used to：
Interior data are acquired in real time using pulse ultra-broad band radar, and by the independent received radar signal group of multirow
Radar signal matrix is synthesized, is stored and is judged；
DC component, bandpass filtering are removed to the radar signal matrix received and noise wave removing is gone based on SVD method
Signal Pretreatment operation.
Optionally, processing module is also used to：
According to the stationary distribution of the placement position of radar and interior seat, based on the distance between radar to each seat
With the invariance of reflective surface area, position interval division is carried out to signal；
From each position section of radar matrix, energy maximum is found out to the position section of each known someone, with
Extract the human body body movement signal comprising human body vital sign；
VMD algorithm is used to the human body body movement signal that each position section extracts respectively, is believed according to human body vital sign
Frequency domain characteristic number inherently is broken down into the IMF component that number determines, and increases in remote position and decompose IMF component
Number；
Obtained IMF component signal will be decomposed, frequency domain is mapped to by FFT, and according to human body respiration frequency range at every point
Between clock 10 times to 30 times, palmic rate range is per minute between 50 times to 130 times, and selecting frequency is in effective range
IMF component.
Optionally, detection module is also used to：
Using the breathing palmic rate of the effective frequency extracted from nearest position section human body from the position；
For the interference problem of interior more people's signal aliasings, on the breathing palmic rate basis for obtaining short distance position human body
On, by IMF of the frequency decomposited in the human body body movement signal of its corresponding time-domain signal and follow-up location in effective range
The time-domain signal of component calculates correlation, and the IMF component that correlation in follow-up location is greater than certain threshold value is removed, to obtain
Thus the true breathing heartbeat signal of human body on follow-up location avoids the interference problem of interior more people's signal aliasings, obtains simultaneously
More people breathe palmic rate.
The embodiment of the present invention, which shows to obtain, is placed in the interior collected somatic data of pulse ultra-broad band radar, by radar
It receives signal and is divided into different apart from section, human body body movement signal is extracted from each section and is therefrom divided using VMD algorithm
The different frequency signals for solving respective number, aiming at the problem that interior more people's signal aliasings, based on correlation in remote position
Property removal short distance position human body respiration heartbeat signal aliasing interference, while obtaining more people and breathing palmic rates.Due to car
Belong to confined space and there are numerous metals, brought multi-path dense often influences whether the selection to human body body movement signal, base
Effectively the region of search of human body body movement signal can be limited within the scope of one in the interval method of known position information, led to
The body movement signal comprising human body vital sign can be obtained in the energy maximum crossed in chosen position section.And since car reflects
Object is numerous, and the vital sign parameter signals of close distance human body can pass through multiple reflections, fill in entire space exploration and with it is remote
The vital sign parameter signals aliasing of human body causes the breathing heartbeat to remote position human body to measure inaccurate.VMD algorithm can be flexible
The number of frequency signal is decomposed in ground selection, is owned by increasing the IMF component number that off-site location is decomposed with abundant
Frequency component, and the vital sign parameter signals component bring aliasing interference by short distance position human body multiple reflections is therefrom removed,
The vital sign parameter signals on current location can be obtained.The present invention can be monitored contactlessly simultaneously by pulse ultra-broad band radar
Interior more people's vital sign parameter signals, do not influenced by light, privacy it is good, and single thunder is only needed for small-sized and intermediate
Up to covering and detection can be realized.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.
Fig. 1 is that the process of the more people's vital sign monitoring methods of the contactless car of one kind provided in an embodiment of the present invention is illustrated
Figure；
Fig. 2 is the schematic diagram of interior Radar Signal Detection provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram that the VMD in corresponding different location section provided in an embodiment of the present invention is decomposed；
Specific embodiment
In order to which the purpose of the present invention, technical solution and beneficial effect is more clearly understood, below in conjunction with figure and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific example described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
The method that Fig. 1 illustrates the more people's vital sign monitorings of the contactless car of one kind of present example offer
Process, which can be executed by the device of contactless more people's vital signs monitoring.
As shown in Figure 1, the specific steps of the process include：
Pulse ultra-broad band radar is placed in interior acquisition somatic data by step S101.
Step S102, radar return signal is divided into different apart from section, and it is dynamic that body is extracted from each section
Signal and the different frequency signals that respective number is therefrom decomposited using VMD algorithm.
Step S103 removes low coverage based on correlation in remote position aiming at the problem that interior more people's signal aliasings
It offs normal and sets the aliasing interference of human body respiration heartbeat signal, while obtaining more people and breathing palmic rate.
Specifically, in step s101, pulse ultra-broad band radar is placed in interior acquisition somatic data.In order to guarantee to detect
Range covers the passenger on all seats, and the detection area of radar should be more than or equal to the area in compartment.For medium-sized following sedan-chair
For vehicle, whole interior search coverage covering is can be completed in the pulse ultra-broad band radar for installing single detection range up to 10 meters,
Oversize vehicle is then needed to realize the covering and detection of entire carriage area by disposing two or more radars, avoids supervising
Survey blind area.Monitoring for interior more people's vital signs comes from different people when being decomposed using VMD algorithm in order to distinguish
Breathing heartbeat signal, radar should be placed in the position from different people different distance as far as possible.Five-seater as shown in Figure 2,
Radar is installed on the barn door middle position of driver's face, and investigative range covers No. 1 to No. 5 position, and to each
The distance of position is different from, effectively to distinguish the vital sign parameter signals from different people.It should be noted that radar is installed
Position be not limited to barn door after, can be interior other positions.Interior data are carried out using pulse ultra-broad band radar real
When acquire, and by multirow, individually received radar signal is combined into radar signal matrix, is stored and is judged.In order to guarantee to give birth to
Order the accuracy of sign monitoring, the duration of storage and judgement is not answered too short, and in order to guarantee the real-time of its monitoring, duration is not yet
Answer too long, the time can be set by demand as the case may be.For the radar signal matrix received, it is removed direct current, base
The Signal Pretreatment of noise wave removing is gone to operate in the bandpass filtering of Hamming window and based on SVD method.
In step s 102, radar return signal is divided into different apart from section, extracts human body from each section
Body movement signal and the different frequency signals that respective number is therefrom decomposited using VMD algorithm.According to the placement position of radar and
The stationary distribution at interior seat, the invariance based on the distance between radar to each seat He reflective surface area receive radar
Signal carries out position interval division.From each position section of radar matrix, the position section of each known someone is found out
Energy maximum, to extract the body movement signal for including human body vital sign.Since car belongs to confined space and has numerous metals,
Brought multi-path dense influences whether the selection to human body body movement signal, the interval method based on known position information, can be with
Effectively the region of search of human body body movement signal is limited in limited range, passes through the energy maximum in chosen position section
The body movement signal comprising corresponding position human body vital sign can be obtained.The body movement signal difference that each position section is extracted
Using VMD algorithm, IMF points that number determines are broken down into according to the frequency domain characteristic of human body vital sign signal inherently
Amount.Due to interior dense multi-path environments, the human body vital sign signal of short distance position can pass through multiple reflections, and in subsequent bit
Set with the vital sign parameter signals aliasing of corresponding position human body, cause to be difficult to differentiate between.Therefore in order to sufficiently divide on follow-up location
The vital sign parameter signals of corresponding position human body are solved, what the human body body movement signal increase that should be extracted to remote position was decomposed
The number of IMF component.As shown in figure 3, when No. 1 of 5 cars to No. 5 position all someone, in each position section by
The IMF component number that VMD is decomposed is respectively 2,4,6,8 and 10.VMD is a kind of complete non-recursive signal decomposition method,
It carrys out divided band according to the frequency domain characteristic of original signal inherently, is broken down into the IMF component that number determines.It is wherein every
A IMF component is all a bandpass signal, and with the progress of signal decomposition process, centre frequency can be automatically updated.In VMD
In algorithm, IMF component is defined as an AM/FM amplitude modulation/frequency modulation signal.Its expression formula is：
uk(t)=Ak(t)cos(φk(t))
Wherein AkIt (t) is uk(t) instantaneous amplitude.ωkIt (t) is uk(t) instantaneous frequency,
After the IMF component signal decomposed, frequency domain is mapped that by FFT：
Wherein N is number of sampling points.
By the signal spectrum of IMF component, according to human body respiration frequency range per minute between 10 times to 30 times, heartbeat
Frequency range is per minute between 50 times to 130 times, IMF component of the selecting frequency in effective range.
In step s 103, it aiming at the problem that interior more people's signal aliasings, is removed in remote position based on correlation
The aliasing of short distance position human body respiration heartbeat signal interferes, while obtaining more people and breathing palmic rate.For apart from radar most
For close position, the signal of this position does not include the vital sign parameter signals of follow-up location human body and mixing for its multiple reflections signal
It is folded, therefore the frequency for effective IMF component that the position section of minimum distance extracts is exhaled directly as human body at the position
Inhale palmic rate.And since interior reverberation is numerous, the human body vital sign signal of short distance position can pass through multiple reflections, fill
The vital sign parameter signals aliasing being full of in entire space exploration and with remote position human body, causes to remote position human body
It is inaccurate to breathe heartbeat measurement.It, can be sufficiently by after by tuning up the IMF quantity of remote position VMD decomposition in such as step S102
The vital sign parameter signals of continuous position human body and the human body vital sign signal point for filling the short distance position in space exploration
It separates out and.Therefore, obtain short distance position human body breathing palmic rate on the basis of, by its it is corresponding breathing with heartbeat when
The time-domain signal for multiple effective IMF components that domain signal is decomposited with follow-up location calculates correlation, and will be in follow-up location
The IMF component that correlation is greater than certain threshold value removes, and to obtain the breathing heartbeat signal of human body on follow-up location, thus avoids vehicle
The interference problem of interior more people's signal aliasings, while obtaining more people and breathing palmic rate.
It should be noted last that above embodiments only illustrate technical solution of the present invention rather than limitation to supplement.To the greatest extent
Pipe the invention is described in detail with reference to an embodiment, this field it is vast it will be appreciated by the skilled person that skill of the invention
Art scheme is modified or is replaced on an equal basis, without departure from the spirit and scope of technical solution of the present invention, should all cover at this
In the scope of the claims of invention.
Claims (8)
1. a kind of method of the more people's vital sign monitorings of contactless car, which is characterized in that including：
Pulse ultra-broad band radar is placed in interior acquisition somatic data；
Radar return signal is divided into different apart from section, human body body movement signal is extracted from each section and uses VMD
Algorithm therefrom decomposites the different frequency signals of respective number；
Aiming at the problem that interior more people's signal aliasings, short distance position human body respiration is removed based on correlation in remote position
The aliasing of heartbeat signal interferes, while obtaining more people and breathing palmic rate.
2. the method as described in claim 1, which is characterized in that described that pulse ultra-broad band radar is placed in interior acquisition human body number
According to, including：
Interior data are acquired in real time using pulse ultra-broad band radar, and individually received radar signal is combined by multirow
Radar signal matrix is stored and is judged；
DC component, bandpass filtering and the letter for being removed based on SVD method noise wave removing are removed to the radar signal matrix received
Number pretreatment operation.
3. the method as described in claim 1, which is characterized in that described that radar return signal is divided into different distance regions
Between, human body body movement signal is extracted from each section and the different frequency signals of respective number are therefrom decomposited using VMD algorithm,
Including：
According to the stationary distribution of the placement position of radar and interior seat, based on the distance between radar to each seat and instead
The invariance for penetrating area carries out position interval division to signal；
From each position section of radar matrix, energy maximum is found out to the position section of each known someone, to extract
Human body body movement signal comprising human body vital sign；
VMD algorithm is used respectively to the human body body movement signal that each position section extracts, according to human body vital sign signal sheet
The intrinsic frequency domain characteristic of body is broken down into the IMF component that number determines, and increases the number for decomposing IMF component in remote position
Mesh；
Obtained IMF component signal will be decomposed, frequency domain is mapped to by FFT, and according to human body respiration frequency range per minute 10
Between secondary to 30 times, per minute between 50 times to 130 times, IMF of the selecting frequency in effective range divides palmic rate range
Amount.
4. the method as described in claim 1, which is characterized in that it is described aiming at the problem that interior more people's signal aliasings, in long distance
It offs normal and sets the aliasing interference based on correlation removal short distance position human body respiration heartbeat signal, while obtaining more people's respiratory hearts
Frequency hopping rate, including：
Using the breathing palmic rate of the effective frequency extracted from nearest position section human body from the position；
For the interference problem of interior more people's signal aliasings, on the basis of obtaining the breathing palmic rate of short distance position human body,
By IMF component of the frequency decomposited in the human body body movement signal of its corresponding time-domain signal and follow-up location in effective range
Time-domain signal calculate correlation, and by correlation in follow-up location be greater than certain threshold value IMF component remove, it is subsequent to obtain
The true breathing heartbeat signal of human body on position, thus avoids the interference problem of interior more people's signal aliasings, while obtaining more people
Breathe palmic rate.
5. a kind of device of the more people's vital sign monitorings of contactless car, which is characterized in that including：
Module is obtained, for pulse ultra-broad band radar to be placed in interior acquisition somatic data；
Processing module, it is different apart from section for radar return signal to be divided into, it is dynamic that body is extracted from each section
Signal and the different frequency signals that respective number is therefrom decomposited using VMD algorithm；
Detection module, for removing low coverage based on correlation in remote position aiming at the problem that interior more people's signal aliasings
It offs normal and sets the aliasing interference of human body respiration heartbeat signal, while obtaining more people and breathing palmic rate.
6. device as claimed in claim 5, which is characterized in that the acquisition module is used for：
Interior data are acquired in real time using pulse ultra-broad band radar, and individually received radar signal is combined by multirow
Radar signal matrix is stored and is judged；
DC component, bandpass filtering and the letter for being removed based on SVD method noise wave removing are removed to the radar signal matrix received
Number pretreatment operation.
7. device as claimed in claim 5, which is characterized in that the processing module is used for：
According to the stationary distribution of the placement position of radar and interior seat, based on the distance between radar to each seat and instead
The invariance for penetrating area carries out position interval division to signal；
From each position section of radar matrix, energy maximum is found out to the position section of each known someone, to extract
Human body body movement signal comprising human body vital sign；
VMD algorithm is used respectively to the human body body movement signal that each position section extracts, according to human body vital sign signal sheet
The intrinsic frequency domain characteristic of body is broken down into the IMF component that number determines, and increases the number for decomposing IMF component in remote position
Mesh；
Obtained IMF component signal will be decomposed, frequency domain is mapped to by FFT, and according to human body respiration frequency range per minute 10
Between secondary to 30 times, per minute between 50 times to 130 times, IMF of the selecting frequency in effective range divides palmic rate range
Amount.
8. device as claimed in claim 5, the detection module is used for：
Using the breathing palmic rate of the effective frequency extracted from nearest position section human body from the position；
For the interference problem of interior more people's signal aliasings, on the basis of obtaining the breathing palmic rate of short distance position human body,
By IMF component of the frequency decomposited in the human body body movement signal of its corresponding time-domain signal and follow-up location in effective range
Time-domain signal calculate correlation, and by correlation in follow-up location be greater than certain threshold value IMF component remove, it is subsequent to obtain
The true breathing heartbeat signal of human body on position, thus avoids the interference problem of interior more people's signal aliasings, while obtaining more people
Breathe palmic rate.
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| CN106175731A (en) * | 2016-08-10 | 2016-12-07 | 上海交通大学 | The signal processing system of non-contact vital sign monitoring |
| CN109480787A (en) * | 2018-12-29 | 2019-03-19 | 中国科学院合肥物质科学研究院 | A kind of contactless sleep monitor equipment and sleep stage method based on ULTRA-WIDEBAND RADAR |
| CN109820499A (en) * | 2018-12-24 | 2019-05-31 | 杨爽 | The anti-interference heart rate detection method of height, electronic equipment and storage medium based on video |
| CN110286368A (en) * | 2019-07-10 | 2019-09-27 | 北京理工大学 | A kind of Falls Among Old People detection method based on ULTRA-WIDEBAND RADAR |
| CN110507293A (en) * | 2019-07-26 | 2019-11-29 | 中国电子科技集团公司第三十八研究所 | A kind of ultra-broadband wall-through radar human body respiration and heartbeat detecting method and system |
| CN110716200A (en) * | 2019-11-29 | 2020-01-21 | 湖南华诺星空电子技术有限公司 | Detection method and radar device for detecting life in vehicle |
| CN111308463A (en) * | 2020-01-20 | 2020-06-19 | 京东方科技集团股份有限公司 | Human body detection method and device, terminal equipment, storage medium and electronic equipment |
| CN112298088A (en) * | 2020-10-26 | 2021-02-02 | 深圳创维汽车智能有限公司 | Method and device for monitoring abnormality of life body in vehicle and storage medium |
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