CN101474067B - PVDF array tactile sensor for measuring pulse - Google Patents
PVDF array tactile sensor for measuring pulse Download PDFInfo
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- CN101474067B CN101474067B CN2008102433187A CN200810243318A CN101474067B CN 101474067 B CN101474067 B CN 101474067B CN 2008102433187 A CN2008102433187 A CN 2008102433187A CN 200810243318 A CN200810243318 A CN 200810243318A CN 101474067 B CN101474067 B CN 101474067B
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- 239000002033 PVDF binder Substances 0.000 title claims abstract description 91
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 91
- 239000002184 metal Substances 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000012528 membrane Substances 0.000 claims description 62
- 239000010409 thin film Substances 0.000 abstract description 11
- 210000000707 wrist Anatomy 0.000 abstract description 7
- 238000002559 palpation Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000007667 floating Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000002405 diagnostic procedure Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The invention discloses a PVDF array tactile sensor which can fully collect information and accurately measure pulse. The sensor comprises a metal substrate, a central PVDF thin film which is arranged at a central area of the metal substrate, and a first PVDF piezoelectric thin film, a second PVDF piezoelectric thin film, a third PVDF piezoelectric thin film and a forth PVDF piezoelectric thin film which are arranged at an edge area of the metal substrate. Compared with the prior art, the PVDF array tactile sensor for measuring the pulses has the following advantages: a symmetrical and annular structure with a circular PVDF piezoelectric thin film at the center and four arc-shaped PVDF piezoelectric thin films at the edges is used, thus the position angle of a pulse sensor on the pulse-feeling and palpation part of the wrist does not affect the signal collection, and the pulse information can be fully and accurately measured.
Description
Technical field
The present invention relates to a kind of pulse transducer, relate in particular to a kind of PVDF array tactile sensor of measuring pulse.
Background technology
Over more than 2,000 year, the traditional Chinese medical science accumulates aspect pulse-taking and has played profuse experience, is the rarity of the Chinese nation.But because the restriction of historical conditions, the various pulse conditions of the traditional Chinese medical science can only qualitative description, likens to be natural phenomena more.For example stringy pulse is likened to and be " as the string that draws a bow ", floating pulse is likened to " floating wood " etc. as water.Since can only qualitative description, and different doctor is variant to the understanding of natural landscape, feeling the pulse skill complexity is difficult to grasp, and the maneuver of feeling the pulse also has difference, has also just caused in pulse difference analytically.Along with the development of society, pressed for a kind of objective, pulse-taking method accurately and be used for clinical diagnosis.
Therefore, it is very necessary developing a kind of pulse transducer.Pulse transducer is gathered people's pulse wave, analyzes comparison through being input to computer behind the signal processing.So just can accomplish quantitative description and analysis to pulse signal, such analysis is accurate, objective, brings great convenience for doctor's diagnosis, can greatly reduce the probability of mistaken diagnosis.
Three positions of cun,guan,chi the time are got in traditional Chinese medical science feeling the pulse, by floating, in, heavy three kinds of diagnostic methods feeling the pulse.Existing pulse transducer all adopts the spot measurement method, though this spot measurement method is simple, but pulse transducer can affect greatly measuring-signal in the deviation of wrist position placement location, and the three kind diagnostic methods of the pulse transducer of this spot measurement all can not simulate palpation the time.The PVDF array tactile sensor that the present invention measures pulse is a kind of array pulse transducer based on the PVDF piezoelectric, can extract the signal of cun,guan,chi simultaneously.
Summary of the invention
The invention provides a kind of information gathering and measure the PVDF array tactile sensor of pulse comprehensively and accurately.
The present invention adopts following technical scheme:
A kind of PVDF array tactile sensor of measuring pulse, comprise metal substrate, be provided with central PVDF piezoelectric membrane at the metal substrate central area, be provided with a PVDF piezoelectric membrane, the 2nd PVDF piezoelectric membrane, the 3rd PVDF piezoelectric membrane and the 4th PVDF piezoelectric membrane in the marginal zone of metal substrate.
Compared with prior art, the present invention's PVDF array tactile sensor of measuring pulse has following advantage:
(1) existing pulse transducer all adopts the spot measurement method, can only measure one road pulse signal at every turn.And the present invention measures the PVDF array tactile sensor of pulse owing to adopt middle a slice PVDF piezoelectric membrane for circular, PVDF piezoelectric membrane on every side is annular array structure, the pulse transducer of this array can once collect the pulse signal at cun,guan,chi position simultaneously, the pulse information of the collection complexity of not omitting, remedy in the past the single-point pulse transducer and can only gather one road signal, the incomplete shortcoming of information.
(2) the present invention measures the PVDF array tactile sensor of pulse, is provided with central PVDF piezoelectric membrane 2 at metal substrate 1 central area, is provided with a PVDF piezoelectric membrane 3 and the 2nd PVDF piezoelectric membrane 5 in the marginal zone of metal substrate 1.Though can solve the disposable acquisition problems of cun,guan,chi position pulse signal according to technique scheme, but, the above-mentioned pulse transducer of three PVDF piezoelectric membranes formations that only adopts is when gathering pulse signal, placement angle to pick off requires very strict, three PVDF piezoelectric membranes must be aimed at the cun,guan,chi position respectively, have deviation just can cause the measuring-signal distortion slightly.But, the present invention also is provided with the 3rd PVDF piezoelectric membrane 4 and the 4th PVDF piezoelectric membrane 6 in the marginal zone of metal substrate 1, and a PVDF piezoelectric membrane 3, the 2nd PVDF piezoelectric membrane 5, the 3rd PVDF piezoelectric membrane 4 and the 4th PVDF piezoelectric membrane 6 constitute symmetric annular array.The pulse transducer of this symmetrical structure can not impact signals collecting in the placement angle at wrist palpation position, no matter what kind of angle this pulse transducer is placed with at the wrist position, and pick off can collect the pulse signal at cun,guan,chi position simultaneously.
(3) though the frequency of human pulse signal is very low, about about 1Hz, highest frequency component also is no more than 40Hz.But because the frequency response range of PVDF piezoelectric membrane big (0.1-100MHz) can cover the frequency range of pulse signal fully, so can distortionless collection pulse signal.
The piezoelectric constant of PVDF piezoelectric membrane of the present invention is very big, than high ten times of quartz crystals.The PVDF piezoelectric membrane is light and pliable and tough, the convenient making, and the damping of PVDF piezoelectric membrane is little, and density is low, frequency response range big (0.1-100MHz).Though the frequency of human pulse signal is very low, be about about 1Hz, highest frequency component also is no more than 40Hz, fully in the bandwidth range of PVDF piezoelectric membrane.
According to the method for traditional Chinese medical science feeling the pulse, the array tactile sensor that the present invention proposes based on the PVDF piezoelectric membrane.Piezoelectric membrane is fixed on the metal substrate, and metal substrate is for being total to anode, and the another side of PVDF is a negative electrode.The PVDF thin film has five, and middle a slice is circular, and outside four is annular, and the pulse information collection is comprehensive and accurate in use thereby make the present invention.
When the PVDF piezoelectric membrane was subjected to pressure from pulse signal, PVDF thin film both sides induced equivalent xenogenesis electric charge, and the quantity of electric charge is with the suffered pressure correlation of PVDF piezoelectric membrane.As shown in Figure 2, this charge signal amplifies through charge amplifier earlier after lead-in wire is drawn, each is multi-channel gating switch gating one road pulse signal constantly, after the filtering of pulse signal process, the processing and amplifying, change through A/D converter then, digital signal after the conversion is sent into single-chip microcomputer, and single-chip microcomputer can be delivered to computer with pulse signal by the RS232 serial ports.
Description of drawings:
Fig. 1 is the PVDF array tactile sensor structure chart that the present invention measures pulse.
Fig. 2 is a principle of the invention block diagram.
The specific embodiment
A kind of PVDF array tactile sensor of measuring pulse comprises metal substrate 1, is provided with central PVDF piezoelectric membrane 2 at metal substrate 1 central area, is provided with a PVDF piezoelectric membrane 3 and the 2nd PVDF piezoelectric membrane 5 in the marginal zone of metal substrate 1.Though can solve the disposable acquisition problems of cun,guan,chi position pulse signal according to technique scheme, but, the above-mentioned pulse transducer of three PVDF piezoelectric membranes formations that only adopts is when gathering pulse signal, placement angle to pick off requires very strict, three PVDF piezoelectric membranes must be aimed at the cun,guan,chi position respectively, have deviation will cause the measuring-signal distortion slightly.Therefore, present embodiment adopts following technical measures just can address the above problem: also be provided with the 3rd PVDF piezoelectric membrane 4 and the 4th PVDF piezoelectric membrane 6 in the marginal zone of metal substrate 1, and a PVDF piezoelectric membrane 3, the 2nd PVDF piezoelectric membrane 5, the 3rd PVDF piezoelectric membrane 4 and the 4th PVDF piezoelectric membrane 6 constitute symmetric annular array.The pulse transducer of this symmetrical structure can not impact signals collecting in the placement angle at wrist palpation position, no matter what kind of angle this pulse transducer is placed with at the wrist position, and pick off can collect the pulse signal at cun,guan,chi position simultaneously.
Hereinafter reaching specific embodiment in conjunction with the accompanying drawings is described in detail the PVDF array tactile sensor that the present invention measures pulse.
As shown in Figure 1, the PVDF array tactile sensor of measuring pulse is made up of metal substrate and five PVDF piezoelectric membranes that are fixed on the metal substrate.On circular metal substrate 1, fix five PVDF piezoelectric membranes, PVDF piezoelectric membrane 2, a PVDF piezoelectric membrane 3, the 2nd PVDF piezoelectric membrane 5, the 3rd PVDF piezoelectric membrane 4 and the 4th PVDF piezoelectric membrane 6, wherein PVDF piezoelectric membrane 2 is circular, be positioned at the center of metal bottom 1, other four PVDF thin film are annular, the outside that is distributed in metal substrate 1 symmetrically.
When measuring pulse signal, the PVDF array tactile sensor is close to the position of human wrist place traditional Chinese medical science palpation, the PVDF piezoelectric membrane just can be experienced the pressure from pulse signal, this moment, PVDF thin film both sides induced equivalent xenogenesis electric charge, the quantity of electric charge is relevant with the pressure of the suffered pulse of PVDF piezoelectric membrane, and this charge signal amplifies by charge amplifier earlier after lead-in wire is drawn; Each is a Single-chip Controlling multi-channel gating switch gating one road pulse signal constantly, after the pulse signal process filtering of gating, the processing and amplifying, change through A/D converter then, the digital signal after the conversion is sent into single-chip microcomputer again, and single-chip microcomputer is delivered to computer by the RS232 serial ports with pulse signal.
Claims (1)
1. PVDF array tactile sensor of measuring pulse, comprise metal substrate (1), be provided with central PVDF piezoelectric membrane (2) at metal substrate (1) central area, be provided with a PVDF piezoelectric membrane (3) and the 2nd PVDF piezoelectric membrane (5) in the marginal zone of metal substrate (1), it is characterized in that: also be provided with the 3rd PVDF piezoelectric membrane (4) and the 4th PVDF piezoelectric membrane (6) in the marginal zone of metal substrate (1), and, the one PVDF piezoelectric membrane (3), the 2nd PVDF piezoelectric membrane (5), the 3rd PVDF piezoelectric membrane (4) and the 4th PVDF piezoelectric membrane (6) are symmetry, annular array, a described PVDF piezoelectric membrane (3), the 2nd PVDF piezoelectric membrane (5), the 3rd PVDF piezoelectric membrane (4) or the 4th PVDF piezoelectric membrane (6) are fan-shaped circular PVDF piezoelectric membrane bar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102433187A CN101474067B (en) | 2008-12-26 | 2008-12-26 | PVDF array tactile sensor for measuring pulse |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102433187A CN101474067B (en) | 2008-12-26 | 2008-12-26 | PVDF array tactile sensor for measuring pulse |
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| CN101474067A CN101474067A (en) | 2009-07-08 |
| CN101474067B true CN101474067B (en) | 2011-12-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI460895B (en) * | 2012-06-27 | 2014-11-11 | 中原大學 | Triaxial piezoelectric sensor |
| CN103431848B (en) * | 2013-09-22 | 2015-10-21 | 天津普仁万合信息技术有限公司 | A kind of Portable passive sensor |
| CN104000567B (en) * | 2014-06-13 | 2017-01-11 | 河海大学常州校区 | Portable multipoint pulse wireless monitoring system |
| DE102014014389A1 (en) * | 2014-10-02 | 2016-04-07 | Hella Kgaa Hueck & Co. | A sensor device and method for detecting at least one touch event on a vehicle |
| CN104545825B (en) * | 2014-11-25 | 2017-11-24 | 中原工学院 | PVDF fexible film body temperature heart sound integrated sensors |
| CN104352223A (en) * | 2014-12-05 | 2015-02-18 | 王永忠 | Pressure regulating type smart watch for measuring pulse condition and measurement method |
| CN105640513A (en) * | 2015-12-31 | 2016-06-08 | 中国科学院微电子研究所 | Pulse wave array sensor acquisition system and method |
| CN109805918A (en) * | 2018-12-28 | 2019-05-28 | 北京津发科技股份有限公司 | A kind of equipment based on annular multipoint pressure measurement pulse wave |
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Inventor after: Song Aiguo Inventor after: Qu Chuankun Inventor after: Li Jianqing Inventor after: Wu Juan Inventor after: Qian Yuning Inventor after: Li Huijun Inventor after: Cui Jianwei Inventor after: Wang Aimin Inventor before: Song Aiguo Inventor before: Qu Chuankun Inventor before: Li Jianqing Inventor before: Wu Juan Inventor before: Li Huijun Inventor before: Cui Jianwei Inventor before: Wang Aimin |
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Effective date of registration: 20140818 Address after: 226600 Li Town Industrial Park, Haian County, Nantong, Jiangsu Patentee after: JIANGSU JIANGHAI MACHINE TOOLS GROUP Co.,Ltd. Patentee after: SOUTHEAST University Address before: 210096 Jiangsu city Nanjing Province four pailou No. 2 Patentee before: Southeast University |
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