CN103027684A - Device and method for removing noise caused by body motion in respiratory movement monitoring - Google Patents
Device and method for removing noise caused by body motion in respiratory movement monitoring Download PDFInfo
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- CN103027684A CN103027684A CN201210376447XA CN201210376447A CN103027684A CN 103027684 A CN103027684 A CN 103027684A CN 201210376447X A CN201210376447X A CN 201210376447XA CN 201210376447 A CN201210376447 A CN 201210376447A CN 103027684 A CN103027684 A CN 103027684A
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Abstract
The invention provides a device for removing noise caused by body motion in respiratory movement monitoring. The device comprises at least two accelerometers and a processing unit, wherein first and second accelerometers in the at least two accelerometers are placed on opposite sides of a body in the belly or chest; and the processing unit is used for generating a noise-free acceleration signal Vacc according to acceleration signal components Ax, Ay and Az acquired by the first accelerometer and acceleration signal components Ax, Ay and Az acquired by the second accelerometer. The device disclosed by the invention can be used to remove the noise caused by the body motion in the respiratory movement monitoring and enhance respiratory movement so as to make the respiratory movement monitoring become more effective and sensitive.
Description
Technical field
The present invention relates to the respiratory movement monitoring, and be particularly related in the respiratory movement monitoring by utilizing complementary accelerometer to remove because the apparatus and method of the noise that body kinematics causes.
Background technology
Obstructive sleep apnea (OSA) is a kind of disorder, and this disorder is characterised in that the asphyxia that causes owing to upper respiratory tract obstruction or sucks the repeatability outbreak that air-flow reduces between sleep period.Polysomnography (PSG), the sleep study that is otherwise known as is a kind of multi-parameters test that uses in sleep study, and as the diagnostic tool in the sleep medical treatment.Portable and easy-to-use monitoring equipment can be to substitute as a kind of of PSG, be used for the diagnosis of less precision, and typically measure four physiological parameters via pulse oximeter, these four physiological parameters comprise that two are breathed variable (for example respiratory movement and air-flow), heart variable (for example heart rate or electrocardiogram) and arterial oxygen haemachrome saturation.Some equipment have the snoring of can detecting, determine body position or detect the additional signal that moves.
Routinely, can bring by the sensing around chest abdominal part and the chest movable signal of monitoring reflection respiratory movement or effort.Now, accelerometer sensor also is used as this purposes because it have easily wear, sensitive and it also can measure body gesture.Triaxial accelerometer is the equipment of measuring at the acceleration of three orthogonal directions (sensitive axis).This sensor is placed on along with air-breathing and expiration and the top of the diaphragm area of enlargement and contraction.
For example, be among the PCT International Application Serial No. PCT/GB02/03302 of " RESPIRATION AND HEART RATE MONITOR " at title, a kind of breathing rate monitor that is used for measuring the breathing rate of health is provided, this monitor comprises adsorbable in upper body part and be arranged at least one accelerometer of the accelerometer output signal that provides relevant with the breathing rate of health, and be used for determining the module that described breathing rate and the monitor that is used to provide the expression respiratory frequency are exported according to the accelerometer output signal, it is not the baseline filter that health is breathed result's pseudo-shadow that this module comprises removing from the accelerometer output signal, in order to the background signal after the removal is provided.
Yet during the sleep or daily breathe of monitoring OSA or other respiratory disorders, the body kinematicses such as similar rotation, walking will cause that other acceleration is added in the movement of thorax signal.It is difficult removing these noises, even rely on wave filter, and therefore these noises will affect certainty of measurement.
Summary of the invention
In view of the problems referred to above of the prior art, the present inventor recognizes needs a kind of apparatus and method of monitoring the noise that is caused by body kinematics for removal in respiratory movement.
Known in the artly be, consisted of by two parts in the output signal of single accelerometer solution of routine, be i.e. part indication respiratory movement and another part indication body kinematics.In output signal, be difficult to these two parts are distinguished, Here it is why conventional single accelerometer solution can not effectively remove because the noise due to the body kinematics, even rely on the wave filter can not.
The present inventor finds, if introduce with reference to (namely, second) accelerometer and it is placed on the health identical with the first accelerometer, so, because the operation principle according to accelerometer, it is identical with that part in the output signal that is included in the first accelerometer to be included in the part of the indication body kinematics in the output signal of the second accelerometer, so can easily remove the noise that is caused by body kinematics by the part of eliminating the indication body kinematics from these two output signals.
Yet, can not optionally place this two accelerometers.For example, if two accelerometers are placed on the same side of health, although because the noise due to the body kinematics still can be removed, Useful Information is namely indicated respirometric part, also may adversely be affected.Therefore, expand in the thoracic cavity or the measurement result of contraction may adversely be affected, and particularly when two accelerometers were mutually close, this was also can remove in the signal from respiratory part because subtract each other.
Therefore, the present invention proposes the apparatus and method of two complementary accelerometers on the health opposite side that a kind of use is placed on abdominal part or chest region.When whole body moves with same direction; in the time of similar walking or other daily routines; the accelerometer of these two complementations will be exported identical signal; and they will export the opposite signal of reflection abdominal part or chest exercise (for example respiratory movement); this is that the thoracic cavity can be expanded or shrink and be given accelerometer opposite signal because when these two accelerometers are placed to the health opposite side.
By utilizing according to device of the present invention, can remove the noise that caused by body kinematics and can the respirometric part of enhancing signal indicating.
Particularly, according to an aspect of the present invention, provide a kind of for removing the device of monitoring the noise that is caused by body kinematics in respiratory movement, it comprises: at least two accelerometers, the first accelerometer in these at least two accelerometers and the second accelerometer are placed on the health opposite side of abdominal part or chest region; And processing unit, it is used for basis by acceleration signal components Ax, Ay and Az and the acceleration signal components Ax that is obtained by the second accelerometer, Ay and Az that the first accelerometer obtains, produces the not noisy acceleration signal Vacc of tool.
Because device according to the present invention adopts the first accelerometer and the second accelerometer, and unlike only adopting an accelerometer to monitor the conventional solution that respiratory movement is made great efforts, so can eliminate or remove the noise that is caused by body kinematics.
In addition, because the first accelerometer and the second accelerometer are placed on the health opposite side of abdominal part or chest region, thus can the respirometric part of enhancing signal indicating, and therefore the respiratory movement monitoring can be more effective and sensitive.
As for how processing acceleration signal components Ax, Ay and Az and the acceleration signal components Ax that is obtained by the second accelerometer, Ay and the Az that is obtained by the first accelerometer, in order to produce the not noisy acceleration signal Vacc of tool, can adopt following at least two algorithms.
For example, according to embodiments of the invention, processing unit can produce the not noisy acceleration signal Vacc of tool in the following manner: synthetic the first acceleration signal V1acc acceleration signal components Ax, the Ay that obtains from the first accelerometer and the Az; Acceleration signal components Ax, the Ay and the Az that obtain from the second accelerometer synthesize the second acceleration signal V2acc; Produce acceleration signal Vacc by from the second acceleration signal V2acc, deducting the first acceleration signal V1acc.
According to other embodiments of the present invention, processing unit can produce the not noisy acceleration signal Vacc of tool in the following manner: in the x, y and z axes of predefined coordinate system, to be decomposed by acceleration signal components Ax, Ay and the Az that the first accelerometer obtains, be created in acceleration signal components Ax ', Ay ' and Az ' in the x, y and z axes of this predefined coordinate system; In the x, y and z axes of this predefined coordinate system, will be decomposed by acceleration signal components Ax, Ay and the Az that the second accelerometer obtains, with the acceleration signal components Ax in the x, y and z axes that are created in this predefined coordinate system ", Ay " and Az "; In the x, y and z axes of this predefined coordinate system, respectively from acceleration signal components Ax ", Ay " and Az " deduct acceleration signal components Ax ', Ay ' and Az ', to produce remaining acceleration signal components Ax " ', Ay " ' and Az " '; And with remaining acceleration signal components Ax " ', Ay " ' and Az " ' synthesize, to produce acceleration signal Vacc.
According to embodiments of the invention, the first accelerometer is positioned with the second accelerometer so that three axles of the first accelerometer are parallel with three axles of the second accelerometer respectively.
In a preferred embodiment, the first accelerometer and the second accelerometer are positioned so that in three axles of each accelerometer in these two accelerometers aligns, and remaining two axles of each accelerometer in these two accelerometers are parallel to each other.
Alternately, three of the first accelerometer axles can be respectively extend at the different directions with respect to three axles of the second accelerometer.In other words, according to the present invention, not the first accelerometer and the second accelerometer must be placed on the complete relative point of health opposite side, and neither place two accelerometers to such an extent that be parallel to each other, and therefore, the present invention can use in clinical setting widely.
Even so, according to other embodiment, this dress can also comprise for the fixed cell on the health that two accelerometers is fixed on the optimum position place.
For example, because lung comprises two parts, when two accelerometers were arranged on the front side of health and the rear side, this front position and rear location optimization ground alignd with the centrage of left lung or right lung.Certainly, accelerometer also can be placed on the health between two parties.Yet like this signal may be just very not remarkable
According to a further aspect in the invention, the method of the noise that a kind of removal causes by body kinematics in respiratory movement monitoring is provided, the method comprises: obtain the obtaining step of acceleration signal components Ax, Ay and Az by at least two accelerometers, the first accelerometer in these at least two accelerometers and the second accelerometer are placed on the health opposite side of abdominal part or chest region; Produce step, acceleration signal components Ax, Ay and Az that its acceleration signal components Ax that obtains according to the first accelerometer, Ay and Az and the second accelerometer obtain produce the not noisy acceleration signal Vacc of tool.
According to one embodiment of the invention, this generation step comprises: acceleration signal components Ax, the Ay and the Az that obtain from the first accelerometer synthesize the first acceleration signal V1acc; Acceleration signal components Ax, the Ay and the Az that obtain from the second accelerometer synthesize the second acceleration signal V2acc; By deducting the first acceleration signal V1acc from the second acceleration signal V2acc, produce acceleration signal Vacc.
According to other embodiments of the present invention, this generation step comprises: in the x, y and z axes of predefined coordinate system, to be decomposed by acceleration signal components Ax, Ay and the Az that the first accelerometer obtains, with the acceleration signal components Ax ' in the x, y and z axes that produce this predefined coordinate system, Ay ' and Az '; In the x, y and z axes of this predefined coordinate system, will be decomposed by acceleration signal components Ax, Ay and the Az that the second accelerometer obtains, with the acceleration signal components Ax in the x, y and z axes that produce this predefined coordinate system ", Ay " and Az "; In the x, y and z axes of this predefined coordinate system, from acceleration signal components Ax ", Ay " and Az " deduct respectively acceleration signal components Ax ', Ay ' and Az ', to produce remaining acceleration signal components Ax " ', Ay " ' and Az " '; With remaining acceleration signal components Ax " ', Ay " ' and Az " ' synthesize, to produce acceleration signal Vacc.
With reference to the description of making by reference to the accompanying drawings, other purposes of the present invention and advantage become more obvious and will be more readily understood.
Description of drawings
To come in conjunction with the embodiments and with reference to the accompanying drawings to describe in more detail and explain the present invention hereinafter, in the accompanying drawings:
Fig. 1 shows according to two accelerometers 11 of one embodiment of the invention and 12 placement;
Fig. 2 shows according to of the present invention for removing the ultimate principle of monitoring the device 30 of the noise that is caused by body kinematics in respiratory movement;
Fig. 3 is the block diagram according to the device 30 of one embodiment of the invention.
The flow chart of the method 40 of Fig. 4 noise that to be removal according to the present invention caused by body kinematics in the respiratory movement monitoring;
Fig. 5 is according to the flow chart of the step 42 in the method 40 of one embodiment of the invention;
Fig. 6 shows that three axles of the first accelerometer 11 lay respectively at the situation with respect to the different directions of three axles of the second accelerometer; And
Fig. 7 is the flow chart of the step 42 of method 40 according to other embodiments of the present invention.
In the accompanying drawing identical Reference numeral representation class like or characteristic of correspondence and/or function.
The specific embodiment
Hereinafter with reference to the accompanying drawing embodiment of the present invention will be described in more detail.
The output signal of conventional single accelerometer solution is comprised of two parts, and namely a part is indicated respiratory movement and another part indication body kinematics.It is difficult distinguishing these two parts in output signal, and this is that conventional single accelerometer solution can not effectively be removed the reason by the noise due to the body kinematics, also is like this even rely on wave filter.
Fig. 1 shows according to embodiments of the invention, and two accelerometers 12 are placed on the human body.Fig. 2 shows according to of the present invention for removing the ultimate principle of monitoring the device 30 of the noise that is caused by body kinematics in respiratory movement.
As can be seen from Figure 1, in the present invention, except the first accelerometer 11, also introduce the second accelerometer 12, and the second accelerometer 12 is placed on the health identical with the first accelerometer 11.
According to the operation principle of accelerometer, the acceleration of accelerometer 11 and accelerometer 12 will be respectively:
V1acc=V1m+V1r and V2acc=V2m+V2r,
Wherein, V1m and V2m represent the acceleration by the body kinematics generation, and V1r and V2r represent by the acceleration of breathing generation.No matter how two accelerometers are being placed aspect position or the direction, the vector acceleration that is caused by body kinematics will be duplicate.
Fig. 2 has shown an example, and wherein accelerometer 11 and accelerometer 12 are placed on the opposite side of chest, and the x, y and z axes of each accelerometer are parallel to each other.By as can be seen from Figure 2, in this case, the vector acceleration that is caused by body kinematics will be duplicate.Yet the vector acceleration that is caused by respiratory movement will be opposite on direction.
From Fig. 2, those skilled in the art can easily be understood that, by eliminate the part of indication body kinematics from two output signals, easily removes by the noise due to the body kinematics.
Fig. 3 is the block diagram of devices in accordance with embodiments of the present invention.
As installing 30 and comprise accelerometer shown in Figure 1 11 and accelerometer 12 as seen from Figure 3, accelerometer 11 and accelerometer 12 are placed on the health opposite side of abdominal part or chest region.
According to embodiments of the invention, can position with the second accelerometer so that three axles of the first accelerometer are parallel respectively with three axles of the second accelerometer the first accelerometer.
In a preferred embodiment, can to the first accelerometer and the second accelerometer position so that in two accelerometers one in three axles of each accelerometer align, and two axles of residue of each accelerometer extend in parallel to each other in two accelerometers.
Alternately, three of the first accelerometer 11 axles extend at the different directions with respect to three axles of the second accelerometer 12 respectively.In other words, according to the present invention, not the first accelerometer and the second accelerometer must be placed on the complete corresponding point of health opposite side, and be not to place two accelerometers to such an extent that be parallel to each other, and therefore, the present invention can use in clinical setting widely.
This device 30 also comprises processing unit 31, this processing unit 31 is used for producing the not noisy acceleration signal Vacc of tool according to the acceleration signal components Ax, the Ay that are obtained by the first accelerometer 11 and Az and acceleration signal components Ax, the Ay and the Az that are obtained by the second accelerometer 12.
Those skilled in the art should understand easily, although only two accelerometers 11 and 12 that show among Fig. 1 and Fig. 3, this device can comprise the accelerometer more than two.
For example, can have the accelerometer that lays respectively on the health opposite side more than a pair of.
Fig. 4 is the flow chart according to the method 40 for removing the noise that is produced by body kinematics in the respiratory movement monitoring of the present invention, describes hereinafter the operation principle of device 30 of the present invention in conjunction with Fig. 4.
As shown in Figure 4, the method 40 of removing the noise that is produced by body kinematics in respiratory movement monitoring according to the present invention comprises obtaining step 41, and at least two accelerometers (the first accelerometer 11 and the second accelerometer 12) of the health opposite side of this obtaining step 41 by being placed on abdominal part or chest region obtain acceleration signal components Ax, Ay and Az.
The method 40 also comprises and produces step 42, acceleration signal components Ax, the Ay that this generations step 42 basis is obtained by the first accelerometer 11 and Az and produce the not noisy acceleration signal Vacc of tool by acceleration signal components Ax, Ay and Az that the second accelerometer 12 obtains.
Owing to adopt the first accelerometer 11 and the second accelerometers 12 according to device 30 of the present invention and method 40, from only to adopt an accelerometer to monitor the conventional solution that respiratory movement makes great efforts different, so can eliminate or remove the noise that is produced by health.
In addition because the first accelerometer 11 and the second accelerometer 12 are placed on the health opposite side of abdominal part or chest region, so can the respirometric part of enhancing signal indicating, and thereby the respiratory movement monitoring can be more effective and sensitive.
Acceleration signal components Ax, the Ay that obtains according to the first accelerometer as for how and Az and the acceleration signal components Ax that is obtained by the second accelerometer, Ay and Az produce the not noisy acceleration signal Vacc of tool, can adopt following at least two kinds of algorithms.
As mentioned above, according to the present invention, not the first accelerometer and the second accelerometer must be placed on the complete corresponding point of health opposite side, and be not to place two accelerometers to such an extent that be parallel to each other.
In other words, these two accelerometers can be placed as shown in Figure 2, and also can place as shown in Figure 6.As shown in Figure 6, three of the first accelerometer 11 axles extend at the different directions with respect to three axles of the second accelerometer 12 respectively.
Fig. 5 is the flow chart of the step 42 in the method 40 according to an embodiment of the invention.
As shown in Figure 5, producing not, the generation step 42 of the noisy acceleration signal Vacc of tool comprises:
About above-mentioned algorithm, no matter be that three axles of the first accelerometer are parallel to respectively three axles with the second accelerometer, or three axles of the first accelerometer extend at the different directions with respect to three axles of the second accelerometer, method of the present invention all is feasible.
Fig. 7 is the flow chart of the step 42 in according to other embodiments of the present invention the method 40.
As described in Figure 7, producing not, the generation step 42 of the noisy acceleration signal Vacc of tool comprises:
About this algorithm, no matter be three axles that three axles of the first accelerometer are parallel to respectively the second accelerometer, or three axles of the first accelerometer extend at the different directions with respect to three axles of the second accelerometer, method of the present invention all is feasible.
Be from unique difference of the last algorithm of describing in conjunction with Fig. 5: because x, y and the z direction of two accelerometers are different, predefined coordinate system is set to reference frame, thus acceleration signal components Ax, Ay and the Az projection thereon of being obtained by first accelerometer and the second accelerometer.
As being understood by those skilled in the art, this predefined coordinate system can arbitrarily be arranged as shown in Figure 6 like that.In other words, it can be in the coordinate system of two accelerometers one, also can be and the coordinate system of two accelerometers different coordinate system all.In a preferred embodiment, it can be G(gravity) coordinate system.
According to the present invention, this device can also comprise for the fixed cell on the health that two accelerometers is fixed on the optimum position place.Because the MEMS technology, the shape factor of accelerometer can be very thin and very little, and therefore, when it is embedded in band or the clothes, it will can not cause inconvenience, even can not during sleeping yet.For mount accelerometers, can use textile tapes or should guarantee that accelerometer is at other device of proper position.
For example, because lung comprises two parts, so when two accelerometers were arranged on the front side of health and rear side, front position and rear location optimization alignd with the centrage of left lung or right lung.Certainly, accelerometer also can be placed on the health between two parties.Yet like this signal may be very not remarkable.
Should be noted in the discussion above that the above embodiments are illustrative rather than restriction the present invention, and those skilled in the art can design alternative embodiment and can not break away from the scope of claims.In the claims, any Reference numeral that is placed between the round parentheses should not be interpreted as limitations on claims.Word " comprises " does not get rid of the element do not listed or the existence of step in claim or description.Word before element " one " or " a kind of " do not get rid of and have a plurality of such elements.In enumerating system's claim of several unit, several in these unit can be by software and/or a hardware implementation with same.Any order is not indicated in the use of word " first ", " second " and " the 3rd " etc.These words should be read as title.
Claims (14)
1. one kind is used for removing the device (30) of monitoring the noise that is caused by body kinematics in respiratory movement, comprising:
At least two accelerometers, wherein, the first accelerometer (11) in described at least two accelerometers and the second accelerometer (12) are placed on the health opposite side of abdominal part or chest region; And
Processing unit (31), it is used for producing the acceleration signal Vacc with described noise according to the acceleration signal components Ax, the Ay that are obtained by described the first accelerometer and Az and by acceleration signal components Ax, Ay and Az that described the second accelerometer obtains.
2. device according to claim 1 (30), wherein, described processing unit (31) produces the described acceleration signal Vacc that does not have described noise in the following manner:
From described acceleration signal components Ax, Ay and synthetic the first acceleration signal V1acc of Az that is obtained by described the first accelerometer (11);
From described acceleration signal components Ax, Ay and synthetic the second acceleration signal V2acc of Az that is obtained by described the second accelerometer (12); And
By deducting described the first acceleration signal V1acc from described the second acceleration signal V2acc, produce described acceleration signal Vacc.
3. device according to claim 1 (30), wherein, described processing unit produces the described acceleration signal Vacc with described noise in the following manner:
In the x, y and z axes of predefine coordinate system, to be decomposed by described acceleration signal components Ax, Ay and the Az that described the first accelerometer (11) obtains, with the acceleration signal components Ax ' in the x, y and z axes that are created in described predefine coordinate system, Ay ' and Az ';
X in described predefine coordinate system, in y and the z axle, to be decomposed by described acceleration signal components Ax, Ay and the Az that described the second accelerometer (12) obtains, with the acceleration signal components Ax in the x, y and z axes that are created in described predefine coordinate system ", Ay " and Az ";
In the x, y and z axes of described predefine coordinate system, respectively from described acceleration signal components Ax ", Ay " and Az " deduct described acceleration signal components Ax ', Ay ' and Az ', to produce remaining acceleration signal components Ax " ', Ay " ' and Az " '; And
By with described remaining acceleration signal components Ax " ', Ay " ' and Az " ' synthesize, produce described acceleration signal Vacc.
4. the described device of any one according to claim 1-3 (30), wherein
Described the first accelerometer (11) and described the second accelerometer (12) are positioned, so that three axles of described the first accelerometer (11) are parallel with three axles of described the second accelerometer (12) respectively.
5. device according to claim 4 (30), wherein
Described the first accelerometer (11) and described the second accelerometer (12) are positioned, so that one of three axles of each accelerometer in described two accelerometers align, and two axles of residue of each accelerometer in described two accelerometers are parallel to each other.
6. the described device of any one according to claim 1-3 (30), wherein
Three axles of described the first accelerometer (11) are in different directions with respect to three axles of described the second accelerometer (12) respectively.
7. device according to claim 1 (30) also comprises:
Fixed cell, it is used for described the first accelerometer (11) and described the second accelerometer (12) are fixed on described health.
8. device according to claim 1, wherein
The front and back that the described health opposite side that described the first accelerometer (11) and described the second accelerometer (12) are positioned is described health or two sides of described health.
9. the method (40) of the noise that caused by body kinematics in the respiratory movement monitoring of a removal comprises:
Obtaining step (41), it obtains acceleration signal components Ax, Ay and Az by at least two accelerometers, and the first accelerometer (11) in described at least two accelerometers and the second accelerometer (12) are placed on the health opposite side of abdominal part or chest region; And
Produce step (42), it produces the acceleration signal Vacc with described noise according to the described acceleration signal components Ax, the Ay that are obtained by described the first accelerometer (11) and Az and described acceleration signal components Ax, the Ay and the Az that are obtained by described the second accelerometer (12).
10. method according to claim 9 (40), wherein, described generation step (42) comprising:
From described acceleration signal components Ax, Ay and synthetic (51) the first acceleration signal V1acc of Az that obtained by described the first accelerometer (11);
To synthesize (52) second acceleration signal V2acc by described acceleration signal components Ax, Ay and the Az that described the second accelerometer (12) obtains; And
Produce (53) described acceleration signal Vacc by deducting described the first acceleration signal V1acc from described the second acceleration signal V2acc.
11. method according to claim 9 (40), wherein, described generation step (42) comprising:
In the x, y and z axes of predefine coordinate system, described acceleration signal components Ax, Ay and Az that described the first accelerometer is obtained decompose (71), with the acceleration signal components Ax ' in the x, y and z axes that are created in described predefine coordinate system, Ay ' and Az ';
In the x, y and z axes of described predefine coordinate system, described acceleration signal components Ax, Ay and Az that described the second accelerometer is obtained decompose (72), with the acceleration signal components Ax in the x, y and z axes that are created in described predefine coordinate system ", Ay " and Az ";
In the x, y and z axes of described predefine coordinate system, respectively from described acceleration signal components Ax ", Ay " and Az " deduct (73) described acceleration signal components Ax ', Ay ' and Az ', to produce remaining acceleration signal components Ax " ', Ay " ' and Az " '; And
By with described remaining acceleration signal components Ax " ', Ay " ' and Az " ' synthesize to produce (74) described acceleration signal Vacc.
12. the described method of any one according to claim 9-11 (40), wherein
Described the first accelerometer (11) and described the second accelerometer (12) are placed, so that three axles of described the first accelerometer (11) are parallel with three axles of described the second accelerometer (12) respectively.
13. method according to claim 12 (40), wherein,
Described the first accelerometer and described the second accelerometer are placed, so that one of three axles of each accelerometer in described two accelerometers align, and two axles of residue of each accelerometer in described two accelerometers are parallel to each other.
14. method according to claim 9 (40), wherein
By fixed cell described the first accelerometer (11) and described the second accelerometer (12) are fixed on the described health.
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| CN106456051A (en) * | 2014-11-21 | 2017-02-22 | 深圳迈瑞生物医疗电子股份有限公司 | Respiratory monitoring apparatus, method and device |
| CN106725300A (en) * | 2015-11-23 | 2017-05-31 | 财团法人车辆研究测试中心 | Biosignal processing system and its excessively noise filtering method |
| CN106725300B (en) * | 2015-11-23 | 2019-12-13 | 财团法人车辆研究测试中心 | physiological signal processing system and noise filtering method thereof |
| CN108784703A (en) * | 2018-07-05 | 2018-11-13 | 西南石油大学 | A kind of wearable monitoring of respiration method of the middle-aged and the old |
| CN114269238A (en) * | 2019-09-18 | 2022-04-01 | 深圳迈瑞生物医疗电子股份有限公司 | Respiration recognition method and device, ventilation equipment and storage medium |
| CN113768491A (en) * | 2021-09-08 | 2021-12-10 | 西安交通大学 | Respiration depth and respiration frequency measuring device and method based on inertia measuring unit |
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