CN208769767U - A kind of flexible acquisition device of physiology signal - Google Patents
A kind of flexible acquisition device of physiology signal Download PDFInfo
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- CN208769767U CN208769767U CN201721250481.7U CN201721250481U CN208769767U CN 208769767 U CN208769767 U CN 208769767U CN 201721250481 U CN201721250481 U CN 201721250481U CN 208769767 U CN208769767 U CN 208769767U
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Abstract
The utility model provides a kind of flexible acquisition device of physiology signal, the acquisition to physiology signal is realized in pressure oscillation by acquiring human body, physiology signal can be acquired without wearing, and the teeth by being arranged on bottom sheet component or upper piece component and piezoelectric membrane generate pressure signal and contact, even if only breathing, pulse or heartbeat generate faint vibration signal because of changing, also the teeth for the distribution of equidistant interval side by side being intensively arranged on bottom sheet component or upper piece component can be touched, piezoelectric membrane, which is pressed, by teeth generates timely pressure signal, deformation collecting signal is generated relative to passing through in traditional physiology signal acquisition device, the present apparatus presses the collection Vibration Signal in Frequency Domain that piezoelectric membrane collecting signal can be more accurate by teeth, to improve the accuracy of acquisition data.
Description
Technical field
The utility model relates to the field of medical instrument technology, and in particular to a kind of flexible acquisition dress of physiology signal
It sets.
Background technique
The acquisition of electro-physiological signals is usually applied to animal and the human experimentation of the subjects such as medicine, psychology, is more often available to
Medical multi-parameter monitoring system and a large amount of diagnostic equipment (such as heart, leads hypnotic instrument at electroence phalograph more), due to electro-physiological signals
It can reflect various physiology and the nervous activity of animal and human body, therefore the acquisition of electro-physiological signals is necessary group of above-mentioned apparatus
At part.
Currently, need to be set by wearable for the real time monitoring of various people's vital sign parameter signals under daily life scene
Standby (such as electronics bracelet, neck ring, vest) is realized.But vital sign parameter signals are carried out using wearable device at present and are acquired mainly
It has the following deficiencies: and 1) needs by the way that signal electrode and human skin to be in close contact, to acquire the pressure signal of muscle generation
And be converted to electric signal and handled, obtain the physiology letter such as human body important physiological signal, such as heartbeat, breathing and twitch
Number, it needs to be in close contact with human skin in the collection process for carrying out physiological signal, user will be given in use
Bring inconvenience；2) signal electrode need to be sticked in human skin surface when acquiring, it may be due to the human body skin pasted every time
The reasons such as skin position difference form different impedances, unstable so as to cause the intensity (amplitude) of the signal of acquisition, allow to
Required physiological signal can not accurately be collected.
In view of the foregoing drawbacks, corresponding some researchs, such as Publication No. have also been carried out both at home and abroad: CN102319057A's
Chinese patent application discloses a kind of " waveform physiology signal acquisition device and physiological signal collection mattress ", which includes:
Waveform flexible body stretches force snesor and signal processing unit；The waveform flexible body include flexible body panel and
Convex flexible body, the convex flexible body are set on flexible body panel, and the human pressure born is converted to drawing force；The drawing
Stretch sensor is set in flexible body panel, generates electric signal according to the drawing force；The signal processing unit is to described
Electric signal carries out the physiological signal that processing obtains human body.Human pressure is converted to electric signal by waveform flexible body by the device
And handled, thus by it is indirect contacted with human skin in a manner of can obtain the physiology of human body in daily life
Signal keeps the acquisition of physiological signal more convenient；It is transmitted to remote equipment using the physiological signal that wireless technology will acquire simultaneously,
Signal acquisition is separated with the operations such as further analysis or unified storage, further facilitates the acquisition of physiological signal.But
The patent is transformed into electric signal since human pressure is converted to drawing force using the deformation by convex flexible body,
Therefore to the variation of slight pressure and insensitive, once the slight pressure generated because of changing when breathing, pulse or heartbeat
Fluctuation insufficient for convex flexible body generate deformation when, the device just can not the above-mentioned sign of precise acquisition, and stretch letter
Number acquisition sensitivity be can not show a candle to pressure touching signal acquisition sensitivity.
For another example: Publication No.: the Chinese patent application of CN104013392A discloses a kind of " physiology signal acquisition dress
Set and its system ", which includes that can generate shaggy flexible pad, the piezoelectric membrane of self-locking effect with rough surface to pass
Sensor, signal acquisition process device and signal output interface；The flexibility pad is provided with interlayer, and the piezoelectric film sensor is set
It is placed in interlayer, piezoelectric film sensor connects the signal acquisition process device, and signal acquisition process device and the signal export
Interface connection；This sensor is disposed on soft bed or sofa, needs to be placed in sensor under sheet or sofa cushion, make
It is shaggy fabric up and down, as someone in use, piezoelectric film sensor is deformed downwards by pressure, due to self-locking effect
It answers, pressure spot is pullled with other positions generation, to generate electric signal, which is by signal acquisition process device acquisition process
Physiology signal, physiology signal are exported by signal output interface.The device is by rough surface and with dissection soft
Property pad and the piezoelectric film sensor that is set in interlayer form a human body physiology signal acquisition device and its system, will be soft
Property pad be arranged when on the soft object such as sofa, mattress, when object compressing on flexible pad when, the stress point of flexible pad
Tensile deformation can occur, to make the piezoelectric film sensor in interlayer collect tension variations, and in the utility model
Flexible pad uses coarse surface, and when object is pressed on flexible pad, being pressed on flexible pad can generate with mattress
Biggish frictional force generates " self-locking " effect, piezoelectric film sensor is allowed to collect the power of repeated stretching by a small margin, from
And it can accurately collect the variation of physiology signal.But in the patent application, the rough surface of flexible pad, still
The contact surface of flexible pad and piezoelectric film sensor be it is smooth, working principle is remained is adopted by piezoelectric film sensor
The tensile deformation for collecting the stress point of flexible pad carries out signal collection, if still exist when breathing, pulse or heartbeat because
When insufficient for stress point tensile deformation occurs for the slight pressure fluctuation for changing and generating, which just can not be on precise acquisition
The problem of stating sign.
Utility model content
In view of the deficiencies of the prior art, the utility model proposes a kind of flexible acquisition device of physiology signal, nothings
Need to dress can acquire physiology signal, and the present apparatus acquires sign in such a way that teeth pressure presses conductive film,
The accuracy of acquisition data can be improved.
To realize above-mentioned technical proposal, the utility model provides a kind of flexible acquisition device of physiology signal, wraps
Include: bottom sheet component, upper piece component and piezoelectric membrane, the piezoelectric membrane are clamped between bottom sheet component and upper piece component, bottom sheet
Component and upper piece component are fabricated from a flexible material, it is characterised in that: are provided with signal on an end of the bottom sheet component
Seat is exported, signal lead-out wire is provided on an end of piezoelectric membrane, the signal lead-out wire is connect with signal output seat, institute
State be provided on the inner surface that at least one component is contacted with piezoelectric membrane among bottom sheet component and upper piece component it is equidistant side by side
The teeth being spaced apart.
In the actual use process, this flexibility acquisition device need to be only placed in mattress, pillow or cushion, is not necessarily to
Directly contacted with human skin, when human pressure changes, can automatically by flexible acquisition device bottom sheet component or
The teeth being arranged on upper piece component contact with piezoelectric membrane and generate pressure signal, since bottom sheet component and upper piece component are by soft
Property material be made, and piezoelectric membrane is clamped between bottom sheet component and upper piece component, therefore even if only breathing, pulse or the heart
It jumps and generates faint vibration signal because of changing, can also touch and intensively be arranged side by side on bottom sheet component or upper piece component
The teeth of equidistant interval distribution, press piezoelectric membrane by teeth and generate timely pressure signal.In this way, relative to traditional
By generating deformation collecting signal, it is faint that the present apparatus by teeth presses the collection that piezoelectric membrane collecting signal can be more accurate
Vibration signal, to improve the accuracy of acquisition data.
Preferably, the bottom sheet component and upper piece module inner are provided with the teeth of equidistant interval distribution side by side, and
The teeth being arranged in bottom sheet module inner and the teeth being arranged in upper piece module inner are interspersed.It is demonstrated experimentally that instantly
Piece component and upper piece module inner are provided with the teeth of equidistant interval distribution side by side, and be arranged in bottom sheet module inner
When the teeth being arranged in teeth and upper piece module inner are interspersed, data the sensitiveest to the perception of Vibration Signal in Frequency Domain
The accuracy highest of acquisition.
Preferably, the cross-sectional shape of the teeth is trapezoidal, semicircle, triangle or square.In actual inspection
During survey, when the cross-sectional shape of teeth is designed as trapezoidal, semicircle, triangle or square, data are acquired accurate
Property can satisfy actual use, wherein again with when the cross-sectional shape of teeth is designed as isosceles trapezoid, effect is best, when
When the cross-sectional shape of teeth is designed as isosceles trapezoid, the Vibration Signal in Frequency Domain and preferably of human body can be conducted well
Piezoelectric membrane is protected not damage because of teeth pressure.
Preferably, the facewidth a of the isosceles trapezoid teeth is 0.4-2mm, and the high h of tooth is 0.5-1mm, between adjacent two teeth
Distance d be 4-8mm.More preferred, the facewidth a of the isosceles trapezoid teeth is 0.8mm, and the high h of tooth is 0.8mm, adjacent two
The distance between teeth d is 6mm.It is demonstrated experimentally that the shape when teeth is designed as isosceles trapezoid, and the facewidth of isosceles trapezoid teeth
A is 0.8mm, and the high h of tooth is 0.8mm, and when the distance between adjacent two teeth d is 6mm, collected data are the most accurate, and
It is minimum to the damage of piezoelectric membrane.
Preferably, the signal lead-out wire of the piezoelectric membrane uses silica gel line, and silica gel line uses S type cabling, Ci Zhongshe
Counting the frictional force increased between silica gel line and bottom sheet component can be with auxiliary protection pressure when there is external force to be applied on silica gel line
Conductive film prevents piezoelectric membrane stress to be pulled off.
Preferably, it is provided with positioning column on described former and later two ends of bottom sheet module inner, piezoelectric membrane is forward and backward
Location hole corresponding with positioning column is provided on two ends, the location hole is the long hole that length is 2-4mm, piezoelectric membrane
It is fixed between bottom sheet component and upper piece component by the way that cooperation between positioning column and positioning hole is removable.Location hole is designed as
Length is the long hole of 2-4mm, it is ensured that while positioning to piezoelectric membrane, and can give piezoelectric membrane in horizontal position 2-4mm
Removable space tears so as to avoid generating because of the variation of piezoelectric membrane stress tensile elongation.
Preferably, the silica gel material that bottom sheet component uses soft or hard degree different with upper piece component is made, and bottom sheet component is than upper
Piece component is more soft.Upper piece component hardness is higher to be beneficial to preferably conduct the faint vibration signal of human body, is reduced signal and is existed
Loss in upper piece component material, lower sheet hardness is softer, is beneficial to be conducted through the vibration signal come and preferably presses piezoelectric membrane,
To export high-quality signal (intensity height, the apparent signal of feature).
The utility model additionally provides a kind of flexible acquisition system of physiology signal, comprising:
The flexible acquisition device of physiology signal above-mentioned, the flexibility acquisition device are used to acquire the faint vibration of human body
Dynamic signal, and vibration signal is converted into electric signal；
Data operation box, the data operation box include filter circuit, amplifying circuit, single-chip microcontroller and wireless transport module,
Filter circuit and amplifying circuit are handled for being filtered, amplifying by the collected electric signal of flexible acquisition device through single-chip microcontroller
Digital signal is converted to, is transmitted to server finally by wireless transport module；
Server, the server include data processing module, and the data processing module is used for from data operation box
Isolated respiratory rate, heart rate, the frequency domain parameter from bed signal and HRV in the aliasing sign digital signal of transmission, and utilize
The frequency domain parameter of HRV judges the emotional stress index of user, using the judgement for carrying out unexpected falling from bed from bed signal, and will place
Data after reason are transmitted to monitoring device；
Monitoring device, the monitoring device include mobile phone, intelligent display plate or the monitoring computer positioned at nurse station, institute
It states monitoring device and is handled and shown by the data that special-purpose software sends server.
A kind of beneficial effect of the flexible acquisition device of physiology signal provided by the utility model is:
1) the flexible acquisition device of this physiology signal is realized by the pressure oscillation of acquisition human body and is believed Human Physiology
Number acquisition, physiology signal can be acquired without wearing, and by being arranged on bottom sheet component or upper piece component
Teeth contact with piezoelectric membrane and generate pressure signal, even if only breathing, pulse or heartbeat generate faint because of changing
Vibration signal, can also touch the teeth for the distribution of equidistant interval side by side being intensively arranged on bottom sheet component or upper piece component,
Piezoelectric membrane is pressed by teeth and generates timely pressure signal, relative to passing through generation in traditional physiology signal acquisition device
Deformation collecting signal, the present apparatus press the collection weak vibration letter that piezoelectric membrane collecting signal can be more accurate by teeth
Number, to improve the accuracy of acquisition data.Simultaneously by the design to teeth shape and size, data acquisition can improved
While accuracy, the damage to piezoelectric membrane is avoided, improves the service life of equipment.
2) the flexible acquisition system of this physiology signal can pass through the non-contact precise acquisition human body of flexible acquisition device
The aliasing sign of pulse, breathing and noise, and realize be automatically separated to obtain from aliasing sign respiratory rate, heart rate,
From bed signal and the frequency domain parameter of HRV, finally relevant parameter is shown in monitoring device, so that the physiology letter that human body is faint
Number acquisition and transmission become to be more easier, the data of acquisition are more accurate and reliable.
Detailed description of the invention
Fig. 1 is the Structure explosion diagram of the flexible acquisition device of physiology signal in utility model.
Fig. 2 is cross-sectional view when teeth are trapezoidal in utility model.
Fig. 3 is cross-sectional view when teeth are hemispherical in utility model.
Fig. 4 is cross-sectional view when teeth are triangle in utility model.
Fig. 5 is cross-sectional view when teeth are square in utility model.
Fig. 6 is the schematic diagram of the flexible acquisition system of physiology signal in utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clear, complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Ordinary people in the field's every other embodiment obtained without making creative work, belongs to
The protection scope of the utility model.
A kind of embodiment 1: flexible acquisition device of physiology signal.
Shown in referring to Figures 1 and 2, a kind of flexible acquisition device of physiology signal, comprising: bottom sheet component 1, upper piece group
Part 3 and piezoelectric membrane 2, the piezoelectric membrane 2 are clamped between bottom sheet component 1 and upper piece component 3, bottom sheet component 1 and upper piece group
Part 3 is made of the different silica gel material of soft or hard degree, and bottom sheet component 1 is more soft than upper piece component 3,1 He of bottom sheet component
It is bonded between upper piece component 3 by glue, signal output seat 4 is provided on an end of the bottom sheet component 1, piezoelectricity is thin
Signal lead-out wire 22 is provided on one end of film 2, the signal lead-out wire 22 is connect with signal output seat 4, piezoelectric membrane 2
Signal lead-out wire 22 use silica gel line, and silica gel line use S type cabling, signal output seat 4 outside be additionally provided with a letter
Number out splice going splice 5, bottom sheet component 1 and upper piece 3 inner surface of component are provided with the teeth 11 of equidistant interval distribution side by side, and bottom sheet
The teeth 11 being arranged on 1 inner surface of component and the teeth 11 being arranged on upper piece 3 inner surface of component are interspersed, in bottom sheet component 1
It is provided with positioning column 12 on former and later two ends of surface, is provided on former and later two ends of piezoelectric membrane 2 and positioning column 12
Corresponding location hole 21, the location hole 21 are the long hole that length is 3mm, and piezoelectric membrane 2 passes through positioning column 12 and location hole
Cooperation between 21 is removable to be fixed between bottom sheet component 1 and upper piece component 3, and the cross-sectional shape of teeth 11 is designed to isosceles
It is trapezoidal, and the facewidth a of isosceles trapezoid teeth is 0.8mm, the high h of tooth is 0.8mm, and the distance between adjacent two teeth d is 6mm.
A kind of embodiment 2: flexible acquisition device of physiology signal.
Shown in referring to Figures 1 and 2, teeth 11 are set on 1 inner surface of bottom sheet component, upper piece 3 inner surface Smooth of component,
Remaining feature is same as Example 1.
A kind of embodiment 3: flexible acquisition device of physiology signal.
Shown in referring to Figures 1 and 2,1 inner surface of bottom sheet component is smooth, and teeth 11 are arranged on upper piece 3 inner surface of component, remaining
Feature is same as Example 1.
A kind of embodiment 4: flexible acquisition device of physiology signal.
Referring to Figure 1 and Figure 3 shown in, the cross-sectional shape of teeth is designed as semicircle, as shown in figure 3, and semicircle radius
For 0.8mm, remaining feature is same as Example 1.
A kind of embodiment 5: flexible acquisition device of physiology signal.
Referring to Fig.1 and shown in Fig. 4, the cross-sectional shape of teeth is designed as triangle, as shown in figure 4, and triangle height
For 0.8mm, remaining feature is same as Example 1.
A kind of embodiment 6: flexible acquisition device of physiology signal.
Referring to Fig.1 and shown in Fig. 5, the cross-sectional shape design of teeth is square, as shown in figure 5, and square side
A length of 0.8mm, remaining feature are same as Example 1.
Comparative example 1: commercially available waveform physiology signal acquisition device is used.
Comparative example 2: bottom sheet component 1 and upper piece module inner are all provided with and are set to smooth (not set teeth), remaining feature with
Embodiment 1 is identical.
Test example one, teeth test
In order to verify the influence of teeth and teeth installation site in information collection to small-signal sensitivity, spy is identical
Under the conditions of, using the signal pickup assembly in comparative example 1, comparative example 2, experimental example 1, experimental example 2 and experimental example 3, place respectively
In mattress, tester lies low on mattress, then using the beat pulse of the contact test equipment measurement tester of profession
Frequency (beat pulse number per minute) and respiratory rate (number breathed per minute), and the beat pulse that test equipment is measured
Frequency and respiratory rate detect teeth and teeth installation site in information collection to data collection accuracy as standard control value
Influence, the concrete outcome of experiment is as follows:
Table 1
In experiment, using the accuracy of variance evaluation data acquisition, variance calculation formula are as follows:
σ2=[(x1-m)2+(x2-m)2+ ﹒ ﹒ ﹒+(xn-m)2]/n,
Wherein σ2Indicate that variance yields, m indicate x1, x2﹒ ﹒ ﹒ xnAverage value, x1, x2﹒ ﹒ ﹒ xnIndicate pulse frequency difference or breathing
Rate difference number, n indicate the group number of numerical value.
It can be calculated from table 1 when being tested using comparative example 1, average value the m=(- 4+2-1-4+3+ of pulse frequency difference
Then 4-5-7)/8=-1.5 substitutes into variance calculation formula:
σ2=[(- 4+1.5)2+(2+1.5)2+ ﹒ ﹒ ﹒+(- 7+1.5)2]/8=14.75
Using signal pickup assembly in comparative example 1 to acquire the variance yields of pulse frequency is 14.75, can similarly calculate to obtain use
The variance yields of signal pickup assembly acquisition respiratory rate in comparative example 1 is 2.69.
Table 2
It is equally calculated by variance calculation formula: using the side of the signal pickup assembly acquisition pulse frequency in comparative example 2
Difference is 36.11, and the variance yields using the signal pickup assembly acquisition respiratory rate in comparative example 2 is 7.11.
Table 3
It is equally calculated by variance calculation formula: using the side of the signal pickup assembly acquisition pulse frequency in experimental example 1
Difference is 0.5, and the variance yields using the signal pickup assembly acquisition respiratory rate in experimental example 1 is 0.36.
Table 4
It is equally calculated by variance calculation formula: using the side of the signal pickup assembly acquisition pulse frequency in experimental example 2
Difference is 1.5, and the variance yields using the signal pickup assembly acquisition respiratory rate in experimental example 2 is 1.
Table 5
It is equally calculated by variance calculation formula: using the side of the signal pickup assembly acquisition pulse frequency in experimental example 3
Difference is 0.86, and the variance yields using the signal pickup assembly acquisition respiratory rate in experimental example 3 is 0.61.
By the data in comparison Tables 1 and 2 it can be found that the variance yields of pulse frequency and the variance yields of respiratory rate are equal in table 1
It is smaller than table 2, i.e., if bottom sheet component and upper piece module inner in flexible acquisition device are all provided with and are set to smooth (not set tooth
Tooth), then either all being filled than commercially available waveform physiological signal collection to the data collection accuracy of pulse frequency or respiratory rate
Difference is set, this has also reacted teeth from side and has acquired accurate importance to data.Then contrast table 1 and table 3 can be found again, be used
The accuracy of the collected pulse frequency of flexible acquisition device and respiratory rate in experimental example 1 is significantly larger than commercially available waveform physiology
Signal pickup assembly, and compared with mark value, maximum difference is also 1, and more have and repeatedly realizes 0 error occur, and city
The maximum difference of waveform physiology signal acquisition device sold has reached -7.A following table 1, table 2, table 3,4 and of table are finally compared again
Data in table 5 it can be found that at least needed among the bottom sheet component of flexible acquisition device and upper piece component a component with
Teeth are set on the inner surface of piezoelectric membrane contact, otherwise the effect of data acquisition can be very poor, the possible reason is, if will
The smooth setting of inner surface, the upper piece component or bottom sheet component of flexible acquisition device need to occur biggish deformation just can be with pressure
Conductive film contact, thus causes to incude microvibration insensitive, and is arranged after teeth, upper piece component or bottom sheet group
Part only needs that small fluctuation occurs, and the teeth that will result in corresponding position are contacted with piezoelectric membrane, to improve to small vibration
Dynamic sensitivity.In addition the data in comparison sheet 1, table 3, table 4 and table 5 are it can be found that the installation site of teeth acquires data
Accuracy have certain influence, when teeth are provided separately within bottom sheet component data acquire accuracy it is worst, teeth are independent
The accuracy of data acquisition is better than teeth being provided separately within bottom sheet component when upper piece component is arranged in, and optimal situation is: under
Piece component and upper piece module inner are provided with the teeth of equidistant interval distribution side by side, and be arranged in bottom sheet module inner
The teeth being arranged in teeth and upper piece module inner are interspersed, the accuracy rate highest of data acquisition at this time.
Test example two, the test of teeth shape
In order to verify influence of the teeth shape in information collection to small-signal sensitivity, spy under the same conditions, makes
It with the signal pickup assembly in experimental example 1, experimental example 4, experimental example 5 and experimental example 6, is individually positioned in mattress, tester is flat
It lies on mattress, then using the beat pulse frequency of the contact test equipment measurement tester of profession, (pulse per minute is jumped
Dynamic number) and respiratory rate (number breathed per minute), and using the beat pulse frequency of test equipment measurement and respiratory rate as
Standard control value detects influence of the teeth shape in information collection to data collection accuracy, and the concrete outcome of experiment is as follows:
Table 6
It is calculated by variance calculation formula: using the variance yields of the signal pickup assembly acquisition pulse frequency in experimental example 4
It is 1.43, the variance yields using the signal pickup assembly acquisition respiratory rate in experimental example 4 is 1.23.
Table 7
It is calculated by variance calculation formula: using the variance yields of the signal pickup assembly acquisition pulse frequency in experimental example 5
It is 0.36, the variance yields using the signal pickup assembly acquisition respiratory rate in experimental example 5 is 0.36.
Table 8
It is calculated by variance calculation formula: using the variance yields of the signal pickup assembly acquisition pulse frequency in experimental example 6
It is 0.86, the variance yields using the signal pickup assembly acquisition respiratory rate in experimental example 6 is 0.86.
It can be seen that by comparing the data in table 3, table 6, table 7 and table 8 when teeth are designed to triangle, data are adopted
The accuracy highest of collection, takes second place when being designed to trapezoidal, when being designed to square third, and is designed to that data acquire when semicircle
Accuracy it is worst.Itself the possible reason is, when the area that teeth are contacted with piezoelectric membrane is smaller, the sensitivity of fluctuation is got over
Height, when the cross section of teeth is designed to triangle, teeth contact actually straight line with piezoelectric membrane when pressure oscillation,
Contact area is minimum；And the cross section of teeth is when being designed to trapezoidal, teeth are contacted with piezoelectric membrane when pressure oscillation is actually
The lesser rectangle of one area；And the cross section of teeth is when being designed to square, teeth contact real with piezoelectric membrane when pressure oscillation
It is the biggish rectangle of an area on border；When the cross section of teeth is designed to hemispherical, need bigger contact area that can just make
It obtains teeth to contact with piezoelectric membrane, to generate pressure touching signal.But found in actual experimentation, if by teeth
Cross section be designed to triangle, as the number that teeth are contacted with piezoelectric membrane increases, it is easy to be damaged to piezoelectric membrane
Bad (contact force is excessively concentrated), causes the piezoelectric membrane in later period insensitive to pressure signal, will affect signal pickup assembly
Service life.Therefore, teeth are designed to it is trapezoidal, that is, can guarantee signal acquisition accuracy, ensure that making for acquisition device
Use the service life.
Test example three, trapezoidal teeth dimension test
In order to verify influence of the isosceles trapezoid teeth size in information collection to small-signal sensitivity, spy is in identical item
Under part, facewidth a, the tooth high b and space width d for changing teeth carry out data acquisition, test facewidth a, the high b of tooth and space width d logarithm
According to the influence of collection accuracy.
Experiment one, facewidth a are to the influence in information collection to small-signal sensitivity
Experimental method, using the signal pickup assembly in embodiment 1, other feature is constant, changes facewidth a, facewidth a difference
It is set as 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, it will be using different facewidth a's
Signal pickup assembly is placed in below micro- vibrating device that a fixed frequency is 70 beats/min, with one minute for a cycle, often
The different facewidth a signal pickup assemblies of group acquire 100 groups of data (i.e. 100 minutes), compare different facewidth a signal pickup assembly acquisitions
The accuracy rate of data, such as: when facewidth a=0.2mm, it is 70 beats/min micro- that signal pickup assembly, which is placed in fixed frequency,
Below vibrating device, with one minute for a cycle, if thering are 96 groups to be shown as 70 beats/min in the 100 groups of data acquired at this time
Clock, then when facewidth a=0.2mm, the accuracy of data acquisition is 96%, as long as the data that signal pickup assembly is shown are not 70
Beat/min, then determine that data acquire mistake, experimental result is as shown in table 9:
Table 9
| Facewidth a/mm | Accuracy/% |
| 0.1 | 100 |
| 0.2 | 100 |
| 0.4 | 99 |
| 0.6 | 99 |
| 0.8 | 99 |
| 1 | 97 |
| 1.5 | 93 |
| 2 | 90 |
| 2.5 | 87 |
| 3 | 80 |
As can be seen from Table 9, with the increase of facewidth a, the accuracy of data acquisition is deteriorated, finds out from above-mentioned data, tooth
Wide a is not preferably greater than 2mm, and otherwise the accuracy rate of data acquisition can be easier to pressure in addition in view of facewidth a is smaller less than 90%
Conductive film is damaged (contact force is excessively concentrated), be will affect the service life of piezoelectric membrane, is comprehensively considered, as facewidth a=
It when 0.8mm, that is, can guarantee the accuracy of signal acquisition, ensure that piezoelectric membrane has longer service life.
Experiment two, the high h of tooth are to the influence in information collection to small-signal sensitivity
Experimental method, using the signal pickup assembly in embodiment 1, other feature is constant, changes the high h of tooth, the high h difference of tooth
It is set as 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, it will be using the high h's of different teeth
Signal pickup assembly is placed in below micro- vibrating device that a fixed frequency is 70 beats/min, with one minute for a cycle, often
The high h signal pickup assembly of the different teeth of group acquires 100 groups of data (i.e. 100 minutes), compares the different high h signal pickup assembly acquisitions of tooth
The accuracy rate of data, such as: when the high h=0.8mm of tooth, it is 70 beats/min micro- that signal pickup assembly, which is placed in fixed frequency,
Below vibrating device, with one minute for a cycle, if thering are 99 groups to be shown as 70 beats/min in the 100 groups of data acquired at this time
Clock, then when the high h=0.8mm of tooth, the accuracy of data acquisition is 99%, as long as the data that signal pickup assembly is shown are not 70
Beat/min, then determine that data acquire mistake, experimental result is as shown in table 10:
Table 10
As can be seen from Table 10, with the increase of the high h of tooth, the accuracy of data acquisition first improves to be deteriorated afterwards, when the high h of tooth is
The accuracy that data acquire between 0.6-2mm is higher, and the high h of tooth especially cannot be below 0.4mm, otherwise the accuracy of data acquisition
It can sharply decline, in addition be found in actual assembling process, the high h of tooth is unsuitable excessively high, and it is inconvenient when otherwise piezoelectric membrane is installed,
And easily sliding, when comprehensively considering the selection high h=0.8mm of tooth, effect is best.
Experiment three, space width d are to the influence in information collection to small-signal sensitivity
Experimental method, using the signal pickup assembly in embodiment 1, other feature is constant, changes space width d, space width d
The high h of different teeth will be used by being respectively set to 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 15mm
Signal pickup assembly be placed in a fixed frequency and be below 70 beats/min of micro- vibrating device, with one minute for a cycle,
Every group of difference space width d signal pickup assembly acquires 100 groups of data (i.e. 100 minutes), compares different space width d signal acquisitions
Device acquire data accuracy rate, such as: when space width d=4mm, by signal pickup assembly be placed in fixed frequency be 70 times/
Below micro- vibrating device of minute, with one minute for a cycle, if thering are 94 groups to be shown as in the 100 groups of data acquired at this time
70 beats/min, then when space width d=4mm, the accuracy of data acquisition is 94%, as long as the data that signal pickup assembly is shown
It is not 70 beats/min, then determines that data acquire mistake, experimental result is as shown in table 11:
Table 11
| Space width d/mm | Accuracy/% |
| 1 | 90 |
| 2 | 90 |
| 3 | 91 |
| 4 | 94 |
| 5 | 97 |
| 6 | 99 |
| 7 | 98 |
| 8 | 97 |
| 9 | 95 |
| 10 | 92 |
| 12 | 88 |
| 15 | 79 |
As can be seen from Table 11, with the increase of space width d, the accuracy of data acquisition first improves to be deteriorated afterwards, works as between cog
Higher away from the d accuracy that data acquire between 4-10mm, space width d cannot especially be greater than 12mm, otherwise the standard of data acquisition
True property can sharply decline, and space width is bigger, and expression upper piece component and bottom sheet module inner are more smooth, single when pressure oscillation
The chance that teeth and piezoelectric membrane press in plane product is smaller, so as to cause insensitive to the faint pressure oscillation in part, but such as
Fruit space width is too small, and pressure touching signal is excessively intensive, may cause the misjudgment of piezoelectric membrane signal, also results in signal acquisition not
Correctly.In conclusion space width d should not be too large it is also unsuitable too small, experiments have shown that effect is best as space width d=6mm.And
As: the high h=0.8mm of facewidth a=0.8mm, tooth and space width d=6mm, the acquisition accuracy highest of signal, accuracy is up to
99%.
Embodiment 7: a kind of flexible acquisition system of physiology signal,
Referring to shown in Fig. 6, a kind of flexible acquisition system of physiology signal, comprising:
The flexible acquisition device 100 of physiology signal as described in Example 1, the flexibility acquisition device 100 are used for
The Vibration Signal in Frequency Domain of human body is acquired, and vibration signal is converted into electric signal；
Data operation box 200, the data operation box 200 include filter circuit 210, amplifying circuit 220, single-chip microcontroller 230
And wireless transport module 240, filter circuit 210 and amplifying circuit 220 are used for the collected electric signal of flexible acquisition device 100
It is filtered, amplifies, handled through single-chip microcontroller 230 and be converted to digital signal, be transmitted to service for 240 pieces of mould finally by wireless transmission
Device 300；
Server 300, the server 300 include data processing module 310, the data processing module 310 be used for from
Isolated respiratory rate in the aliasing sign digital signal transmitted in data operation box 200, heart rate, from bed signal and HRV
Frequency domain parameter, and the frequency domain parameter of HRV is utilized to judge the emotional stress index of user, unexpected falling from bed is carried out using from bed signal
Judgement, and will treated that data are transmitted to monitoring device 400；
Monitoring device 400, the monitoring device 400 include mobile phone, intelligent display plate or the monitoring positioned at nurse station
Computer, the monitoring device 400 are handled and are shown by the data that special-purpose software sends server 300.
The flexible acquisition system of this physiology signal can pass through the non-contact precise acquisition human body of flexible acquisition device 100
The aliasing sign of pulse, breathing and noise, and be automatically separated to obtain from aliasing sign by the realization of server 300
Respiratory rate, heart rate, the frequency domain parameter from bed signal and HRV, finally show relevant parameter in monitoring device 400, so that
The acquisition and transmission of the faint physiological signal of human body become to be more easier, and the data of acquisition are more accurate and reliable.
The above be the utility model preferred embodiment, but the utility model should not be limited to the embodiment and
Attached drawing disclosure of that is all fallen so all do not depart from the lower equivalent or modification completed of spirit disclosed in the utility model
Enter the range of the utility model protection.
Claims (9)
1. a kind of flexible acquisition device of physiology signal, comprising: bottom sheet component, upper piece component and piezoelectric membrane, the pressure
Conductive film is clamped between bottom sheet component and upper piece component, and bottom sheet component and upper piece component are fabricated from a flexible material, feature
It is: is provided with signal output seat on an end of the bottom sheet component, is provided with signal on an end of piezoelectric membrane
Lead-out wire, the signal lead-out wire and signal output seat are connect, at least one group among the bottom sheet component and upper piece component
The teeth of equidistant interval distribution side by side are provided on the inner surface that part is contacted with piezoelectric membrane.
2. the flexible acquisition device of physiology signal according to claim 1, it is characterised in that: the bottom sheet component and upper
Piece module inner is provided with the teeth of the distribution of equidistant interval side by side, and the teeth being arranged in bottom sheet module inner with upper piece
The teeth being arranged in module inner are interspersed.
3. the flexible acquisition device of physiology signal according to claim 1 or claim 2, it is characterised in that: the cross of the teeth
Cross sectional shape is trapezoidal, semicircle, triangle or square.
4. the flexible acquisition device of physiology signal according to claim 3, it is characterised in that: the cross section of the teeth
Shape is isosceles trapezoid.
5. the flexible acquisition device of physiology signal according to claim 4, it is characterised in that: the isosceles trapezoid teeth
Facewidth a be 0.4-2mm, the high h of tooth be 0.5-1mm, the distance between adjacent two teeth d be 4-8mm.
6. the flexible acquisition device of physiology signal according to claim 5, it is characterised in that: the isosceles trapezoid teeth
Facewidth a be 0.8mm, the high h of tooth be 0.8mm, the distance between adjacent two teeth d be 6mm.
7. the flexible acquisition device of physiology signal according to claim 1 or claim 2, it is characterised in that: the piezoelectric membrane
Signal lead-out wire use silica gel line, and silica gel line use S type cabling.
8. the flexible acquisition device of physiology signal according to claim 1 or claim 2, it is characterised in that: the bottom sheet component
It is provided with positioning column on former and later two ends of inner surface, is provided on former and later two ends of piezoelectric membrane opposite with positioning column
The location hole answered, the location hole are the long hole that length is 2-4mm, and piezoelectric membrane passes through the cooperation between positioning column and positioning hole
It is removable to be fixed between bottom sheet component and upper piece component.
9. the flexible acquisition device of physiology signal according to claim 2, it is characterised in that: bottom sheet component and upper piece group
Part is made of the different silica gel material of soft or hard degree, and bottom sheet component is more soft than upper piece component.
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