CN104545825B - PVDF fexible film body temperature heart sound integrated sensors - Google Patents
PVDF fexible film body temperature heart sound integrated sensors Download PDFInfo
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- CN104545825B CN104545825B CN201410683135.2A CN201410683135A CN104545825B CN 104545825 B CN104545825 B CN 104545825B CN 201410683135 A CN201410683135 A CN 201410683135A CN 104545825 B CN104545825 B CN 104545825B
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- heart sound
- body temperature
- pvdf
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0247—Pressure sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0271—Thermal or temperature sensors
Abstract
The invention discloses a kind of PVDF fexible films body temperature heart sound integrated sensor, including heart sound test chamber support, heart sound PVDF thin film marginal adhesion is closed in the upper end of heart sound detection support, and by heart sound test chamber pedestal upper end；Insulated fixing support is sleeved on heart sound test chamber support periphery, and heart sound electrode is arranged on insulated fixing support upper end and is adhered to heart sound PVDF thin film lateral surface by conducting resinl；Body temperature electrode sleeve is mounted in insulated fixing support lower end, and body temperature PVDF thin film is adhered on body temperature electrode by conducting resinl；Wire is welded with heart sound electrode and body temperature electrode.The present invention both can dynamic detection temperature signals and cardiechema signals and they do not interfere with each other, also can only heart sound PVDF thin film is directly contacted into front skin and individually detects cardiechema signals.Basic theory of the present invention is ripe, be widely used, cost is low, can Reusability, can the characteristics of mass production, manufacture craft be simple, long lifespan, easy to use and flexible.
Description
Technical field
The invention belongs to technical field of medical instruments, and in particular to a kind of integrated sensing of PVDF fexible films body temperature heart sound
Device.
Background technology
Kynoar（PVDF）Fexible film has started to be applied to medical imaging, medical diagnosis, medical supersonic transducer
Etc., but most of medical physicses sensors can only measure the medical parameter of single organism, it is difficult to realize the collection of parameter
Into measurement.Therefore the integrated detection of multi-parameter is also vast medical rehabilitation scientific research personnel and biomedical devices scientific research personnel always
Research theme and focus.Since Curie in 1880 has found piezo-electric effect, have more than 100 years.1969,
Japan the piezo-electric effect brought KAWAl doctor under control and be found that PVDF, since then people start constantly to study the various of PVDF thin film
Characteristic and effect.Currently it has been discovered that PVDF thin film has piezo-electric effect, pyroelectric effect and dielectric effect.Add within 2004 and take
Big Kenko Arcadia University machinery utilizes PVDF piezoelectric membranes with Department of Industrial Engineering Javad Dargahi and Siamak Najarin
A kind of film touch sensor is have studied, to detect the pressure at some contact points.Canadian Kenko Arcadia University machine in 2007
Tool engineering department S Sokhanvar, M Packirisamy and J Dargahi have developed one kind using PVDF and be used for non-intrusion type
Multi-functional contact sensing system, so as to analyze the contact condition of human body for example point load, load distribution and contact object it is soft
Soft degree, is mainly used in surgical operation.Sweden's Cha Ermusi University materials in 2013 and the Erik of manufacturing technology system
NilssonAuthor Vitae, Anja Lund, VitaeChristian Jonasson et al. have studied available for weaving sensing
The PVDF piezoelectric fabric characteristics of device, will pass through the heartbeat of clothes detection human body.At home, The College of Physics of Jilin University in 2012
Han Bing, Wang Yue et al. have developed a kind of pressure sensor using organic polyvinylidene fluoride PVDF, by the way that PVDF is pasted
On elastic iron plate, the measurement to pressure is realized by the vibration and PVDF thin film of elastic iron plate.Tsing-Hua University is new within 2013
Ceramics and the Wang Lin of hand work National Key Laboratory, all sincere et al. in detail it have studied a kind of touch using PVDF piezoelectric membranes
Screen, optimum precision disclosure satisfy that the requirement of man-machine interaction up to 0.5mm × 0.5mm.It can be seen that people have started to profit even to this day
The detection component related to biologic medical is constantly studied with PVDF correlation effect and excellent performance, it is commercialized work
Never halt.2013, the Yi-Yuan ChiuAuthor of TaiWan, China Changgeng Univ. biochemistry and biologic medical system
Vitae et al. have developed a kind of sensor that can be used for detection breathing using the piezo-electric effect of PVDF materials.When people need
When measuring the multiple parameters of human body, it is necessarily required to use multiple physical sensors.But it will necessarily be limited sometimes by measurement space
System, at this moment may be not in the multiple sensors of placement at detection.In order to measure multiple parameters simultaneously, people just begin one's study
Integrated sensor in terms of biologic medical, i.e. a sensor can measure multiple biological parameters simultaneously.In openheart surgery, human body health
During multiple monitoring, human heart motion study, the limitation narrow and small due to receiving working space, while be required to examine simultaneously
Multiple parameters such as body temperature and heart sound are surveyed, and signal can not interfere with each other in detection process, therefore people are just more next
It is concerned with how more using PVDF piezo-electric effect and pyroelectric effect research and produces and can meet above-mentioned requirements simultaneously
Body temperature heart sound integrated sensor.
The content of the invention
The present invention is to solve when needing to measure the multiple parameters of human body, multiple physical sensors are used, it is impossible to
Only detect the technical problem of multiple parameters simultaneously with a physical sensors.So as to provide a kind of PVDF fexible films body temperature heart sound
Integrated sensor.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows：
A kind of PVDF fexible films body temperature heart sound integrated sensor, including heart sound test chamber support, heart sound PVDF thin film side
Edge is adhered to the upper end of heart sound detection support, and heart sound test chamber pedestal upper end is closed；Insulated fixing support is sleeved on heart sound
Test chamber support periphery, heart sound electrode are arranged on insulated fixing support upper end and are adhered to by conducting resinl outside heart sound PVDF thin film
Side；Body temperature electrode sleeve is mounted in insulated fixing support lower end, and body temperature PVDF thin film is adhered on body temperature electrode by conducting resinl；
Wire is welded with heart sound electrode and body temperature electrode.
Described heart sound test chamber support includes annular support body, and annular boss, heart sound are provided with rack body upper end
PVDF thin film film is adhered in boss side surfaces by conducting resinl and closes heart sound test chamber pedestal upper end.
The insulated fixing support is annular support, is provided with ring-type inner convex platform in insulated fixing support upper end, inner convex platform with
The boss of heart sound test chamber pedestal upper end matches；Ring-type first boss is provided with insulated fixing support lower end and ring-type second is convex
Platform, using such a construction ensures assembling with it is nested when accuracy.
The second boss of insulated fixing support lower end is with the boss in body temperature electrode with matching.
In the first boss of the lower end of insulated fixing support, the projection in body temperature electrode is located at body temperature electrode suit
On the table top of the second boss of insulated fixing support, the side of the second boss of body temperature electrode and insulated fixing support forms groove
Structure, body temperature PVDF thin film are arranged in groove by conducting resinl.
Heart sound PVDF thin film is β type films, because the piezoelectric modulus of β type films is maximum.
Heart sound PVDF thin film utilizes the piezo-electric effect of PVDF thin film；Body temperature PVDF thin film is imitated using the thermoelectricity of PVDF thin film
Should.
Body temperature PVDF thin film directly contacts human body front skin, heart sound PVDF thin film, heart sound test chamber support and front skin
Skin forms a closed detection chambers, while detects body temperature signal and cardiechema signals respectively, and does not interfere with each other.
Heart sound PVDF thin film also can directly contact front skin, and human body cardiechema signals are measured using direct conduction pattern.
Covered with one layer of heat conduction film in body temperature PVDF thin film, for protecting body temperature PVDF thin film, ensure that body temperature PVDF is thin
Film will not fall off with skin contact abrasion.
Heart sound PVDF thin film, heart sound test chamber support and front skin form a closed detection chambers, closed detection
Chamber is in cup.
The present invention is made according to the piezo-electric effect and pyroelectric effect of PVDF thin film, on heart sound test chamber support
Heart sound PVDF thin film is stained with by conducting resinl in the boss side surfaces at end, heart sound PVDF thin film apart from boss surface have it is certain away from
From.Insulated fixing support is sleeved on heart sound test chamber support from heart sound PVDF thin film end, the convex decometer of insulated fixing support
It is connected on the boss of heart sound test chamber support.The heart sound electrode of ring-type is adhered to the outside of heart sound PVDF thin film by conducting resinl
Face, and heart sound electrode is located at the upper surface of insulated fixing support.Wire is welded with heart sound electrode, heart sound PVDF thin film is produced
Raw signal is drawn.Boss position of the body temperature electrode sleeve in the first boss of the lower end of insulated fixing support and in body temperature electrode
In on the table top of second boss.Now, the side of the second boss of body temperature electrode and insulated fixing support forms groove structure.Body
Boss in warm electrode is the bottom of groove, and the boss in body temperature electrode is stained with body temperature PVDF thin film by conducting resinl.
Welding lead on body temperature electrode, so as to which signal caused by body temperature PVDF thin film be drawn.The boss structure that the present invention is set can be protected
Card assembling with it is nested when accuracy.
When body temperature PVDF thin film directly contacts human body skin, because PVDF fexible films have pyroelectric effect, at this moment
Conducting resinl will be passed through in the surface charge in the certain surface charge of the surface of PVDF fexible films generation, PVDF fexible films
Body temperature electrode is transferred to, body temperature electrode exports charge signal through wire, and charge signal is converted into electricity by charge amplifier
Spread out of after pressure signal.According to PVDF surface charges and the relation of body temperature, the dynamic of the body temperature of contact position can be known
Change procedure.
Simultaneously heart sound PVDF thin film, heart sound test chamber support and front skin form one fall cup closed test chamber
Room, during the contraction and diastole of heart, the vibration of blood vessel is transferred to thoracic cavity surface, forms heart sound.Due to front skin away from
Heart is nearest, when human body heart sound is delivered to body surface, will necessarily cause the fluctuation of skin body surface, front skin body surface fluctuates most
Greatly.The vibration of front skin will necessarily compress the air in closed detection chambers so as to cause the vibration of heart sound PVDF thin film, the heart
Sound PVDF thin film inside heart sound PVDF thin film due to piezo-electric effect, producing polarization phenomena, above and below heart sound PVDF thin film
Two surfaces will produce that symbol is opposite, equal-sized electric charge.Signal in heart sound PVDF thin film is delivered to the heart through conducting resinl
Sound electrode, the wire on heart sound electrode export charge signal, and charge signal is converted into voltage signal by charge amplifier
After spread out of.According to the change of cardiechema signals, the change of human body heart sound can be known.
Heart sound PVDF fexible films also directly can directly be contacted front skin by the present invention, using directly conduction heart sound mode
Dynamic detection heart sound.Basic theory of the present invention is ripe, cost is low, manufacture craft is simple, can mass production, can Reusability,
Long lifespan, easy to use and flexible.It can be applied to hospital surgical, cardiac rehabilitation monitoring, medicine equipment, human motion research, heart
The medical rehabilitation fields such as research.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment 1.
Fig. 2 is the structure sectional view of embodiment 1.
Fig. 3 is Fig. 2 partial enlarged drawing B.
Fig. 4 is the Structure explosion diagram of embodiment 1.
Fig. 5 is the signal detection theory diagram of embodiment 1.
Embodiment
Embodiment 1：As Figure 1-5, a kind of PVDF fexible films body temperature heart sound integrated sensor, including heart sound test chamber
Support 1, heart sound test chamber support 1 include annular support body, and annular boss I 1, heart sound PVDF are provided with the upper end of rack body
The edge of film 2 is adhered on the side of boss I 1 by conducting resinl and by the upper end closed of heart sound test chamber support 1.
Insulated fixing support 4 is annular support, and the upper end of insulated fixing support 4 is provided with ring-type inner convex platform 4-1, inner convex platform 4-
1 matches with boss I 1.Ring-type first boss 4-2 and ring-type second boss 4-3 is provided with the lower end of insulated fixing support 4.
Insulated fixing support 4 is sleeved on the periphery of heart sound test chamber support 1 from one end of heart sound PVDF thin film 2, and insulation is fixed
The inner convex platform 4-1 of support is connected on the boss I 1 of heart sound test chamber support 1.Heart sound electrode 5 is arranged on insulated fixing support 4
Upper surface is simultaneously adhered to the side of heart sound PVDF thin film 2 by conducting resinl, and wire 7 is welded with heart sound electrode 5.
Body temperature electrode 6 is arranged on the first boss 4-2 of the lower end of insulated fixing support 4, and the boss in body temperature electrode 6
II 2 on second boss 4-3 table top.The second boss 4-3 of body temperature electrode 6 and insulated fixing support 4 side forms recessed
Slot structure.Boss II 2 in body temperature electrode is the bottom of groove, is adhered on the boss II 2 in body temperature electrode 6 by conducting resinl
There is body temperature PVDF thin film 8.The welding lead 7 on body temperature electrode 6, so as to which charge signal caused by body temperature PVDF thin film 8 be drawn.
Wherein, heart sound PVDF thin film is β type films, and the piezoelectric modulus of β type films is maximum.
Operation principle is as follows：When body temperature PVDF thin film directly contacts human body skin, due to the heat of body temperature PVDF thin film
Release effect, can be in the surface electricity in the certain surface charge of the surface of body temperature PVDF thin film generation, body temperature PVDF fexible films
Lotus is transferred to body temperature electrode by conducting resinl, and body temperature electrode spreads out of signal through wire, and by charge amplifier at
Just temperature signals are formd after reason, according to PVDF surface charges and the relation of body temperature, the body of contact position can be known
The dynamic changing process of temperature.Body temperature PVDF thin film surface charge and the relation of body temperature are as follows：
（1-1）
Wherein：--- the surface charge as caused by temperature change in PVDF thin film；
--- PVDF thin film pyroelectric coefficient；
--- PVDF thin film contact surface is in sometime interior temperature change；
--- PVDF thin film and effective contact area of skin.
After body temperature PVDF is contacted to front skin, heart sound PVDF thin film, heart sound test chamber support and front skin are formed
One closed detection chambers are to fall the cavity of cup.During the contraction and diastole of heart, the vibration of blood vessel will necessarily pass
Thoracic cavity surface is handed to, is at this moment formed heart sound.Because front skin centroid is dirty recently, when human body heart sound is delivered to body surface,
The vibration of skin body surface, front skin body surface vibration maximum will necessarily be caused.The vibration of front skin will necessarily compress closed inspection
The air surveyed in chamber, compressed air will necessarily be by the conduct vibrations of front skin to heart sound PVDF thin film in closed chamber
On, so as to cause the vibration of PVDF thin film, or heart sound PVDF thin film directly contacted into front skin, using directly conduction side
Formula so that PVDF thin film and front skin synchronous vibration.Because the piezo-electric effect of PVDF thin film acts on, thin vibration of membrane necessarily makes
It is internal to produce polarization phenomena, and then PVDF thin film will produce that symbol is opposite, equal-sized electricity on its upper and lower two surface
Lotus.The relation of heart sound PVDF thin film surface charge and front skin vibrations is as follows：
（1-2）
Wherein：--- the piezoelectric modulus of PVDF thin film；
--- the instantaneous force on PVDF thin film surface is applied to due to skin vibrations；
--- due to vibration in surface charge caused by PVDF thin film surface.
Because surface charge is weaker caused by PVDF simultaneously, it is therefore desirable to amplified using charge amplifier, will
It is converted into voltage signal.Relation between the output voltage and input charge of charge amplifier is as follows：
（1-3）
Wherein：--- the feedback capacity of charge amplifier；
The input charge of-charge amplifier, both can beOr；
The output voltage of-charge amplifier.
The manufacture craft process of the present invention, it is specific as follows：
The first step：Take an aluminium ring and processed the heart sound test chamber support with boss structure, while be processed
The side of boss coats conducting resinl to adhere to heart sound PVDF thin film, and heart sound PVDF thin film edge is closely adhered into heart sound detection
On chamber support, and heart sound test chamber pedestal upper end is closed.
Second step：An insulating materials is taken, it is convex with first boss and second with inner convex platform, lower end to be processed into upper end
The insulated fixing support of platform structure, and insulated fixing support is nested on heart sound test chamber support from heart sound PVDF thin film end
End, using conducting resinl strong bond and to compress heart sound PVDF thin film and heart sound test chamber support.
3rd step：One is taken to be used for conductive copper billet（Or copper ring）, heart sound electrode is processed as, in heart sound PVDF thin film
Lateral surface coating conducting resinl after, be set with heart sound electrode from heart sound PVDF thin film end, and connect with insulated fixing support upper surface.
4th step：One is taken to be used for conductive copper billet（Or copper ring）, by it into the internal body temperature electrode with boss structure,
Body temperature electrode sleeve is attached on insulated fixing support again, now with the fixed branch of insulation between body temperature electrode and heart sound test chamber support
Frame is isolated.
5th step：Take a PVDF fexible films and its i.e. body temperature PVDF thin film of annular is made, then in body temperature electrode with insulating
Conducting resinl is uniformly coated in the groove that the side of support bracket fastened second boss is formed, body temperature PVDF thin film is then adhered to body
In the groove of warm electrode.
6th step：Two plain conductors are taken to be connected respectively on heart sound electrode and body temperature electrode.
As shown in figure 4, the measuring circuit of the present invention, specific as follows：Body temperature PVDF thin film and heart sound PVDF in the present invention
Electric charge caused by film after the wire on body temperature electrode, the wire on heart sound electrode are drawn, is sent to linear charge and put respectively
Big device, so as to which the surface charge of PVDF thin film is converted into corresponding output voltage, then the output of linear charge amplifier is electric
A range of output voltage is obtained after pressing the tentatively filtering of low-pass filtered device, preliminary filtered output voltage is again through signal
Conditioning amplifying circuit enters line output voltage conditioning amplification, makes output voltage between 0-5V.The output voltage of conditioned amplification is again
Low-pass filtered device is carried out after filtering again, obtains standard compliant output signal.Standard compliant output signal can be passed directly
It is defeated to arrive signal handling equipment, also it can be transferred to signal handling equipment after A/D change-over circuits.
Embodiment 2：A kind of PVDF fexible films body temperature heart sound integrated sensor, covered with one layer in body temperature PVDF thin film
Heat conduction film, for protecting body temperature PVDF thin film, ensure that body temperature PVDF thin film will not fall off with skin contact abrasion.Remaining is equal
It is same as Example 1.
Claims (4)
- A kind of 1. PVDF fexible films body temperature heart sound integrated sensor, it is characterised in that：Including heart sound test chamber support, heart sound PVDF film edges are adhered to the upper end of heart sound test chamber support, and heart sound test chamber pedestal upper end is closed；The fixed branch of insulation Frame is sleeved on heart sound test chamber support periphery, and heart sound electrode is arranged on insulated fixing support upper end and is adhered to the heart by conducting resinl Sound PVDF film outsides face；Body temperature electrode sleeve is mounted in insulated fixing support lower end, and body temperature PVDF films are adhered to by conducting resinl On body temperature electrode；Wire is welded with heart sound electrode and body temperature electrode；The insulated fixing support is annular support, Insulated fixing support upper end is provided with ring-type inner convex platform, and the boss of ring-type inner convex platform and heart sound test chamber pedestal upper end matches； Insulated fixing support lower end is provided with ring-type first boss and ring-type second boss；The body temperature electrode（6）And insulated fixing support （4）Ring-type second boss（4-3）Side formed groove structure；Boss in body temperature electrode（Ⅱ 2）For the bottom of groove, In body temperature electrode（6）Interior boss（Ⅱ 2）It is upper that body temperature PVDF films are stained with by conducting resinl（8）；Described heart sound detection Chamber support includes annular support body, and annular boss is provided with rack body upper end, and heart sound PVDF film edges pass through conducting resinl Be adhered on annular boss side and by heart sound test chamber pedestal upper end close heart sound PVDF films, heart sound test chamber support and Front skin forms a closed detection chambers.
- 2. the PVDF fexible film body temperature heart sound integrated sensors according to claim 1, it is characterised in that：Insulation is fixed The ring-type second boss of pedestal lower end matches with the boss in body temperature electrode.
- 3. the PVDF fexible film body temperature heart sound integrated sensors according to claim 1, it is characterised in that：Heart sound PVDF Film is β type films.
- 4. the PVDF fexible film body temperature heart sound integrated sensors according to claim 1, it is characterised in that：Body temperature PVDF Covered with one layer of heat conduction film on film.
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| CN109044329A (en) * | 2018-09-13 | 2018-12-21 | 天津工业大学 | A kind of multifunctional bio electric transducer |
| CN113038870A (en) * | 2018-10-04 | 2021-06-25 | 奥尼欧有限公司 | Sensor system and method for continuous wireless monitoring and analysis of heart sounds, circulatory effects and core temperature of a living being |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211253U (en) * | 1987-10-06 | 1988-06-08 | 上海市长海医院 | Micro-computer monitering system for sphygmogram hemodynamics |
| CN1625368A (en) * | 2002-03-25 | 2005-06-08 | 赫艾纳医疗公司 | Passive physiological monitoring (P2M) system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020018512A1 (en) * | 1998-07-01 | 2002-02-14 | 3M Innovative Properties Company | Thin barrier film for containment of halogenated aromatic compounds in a chemical thermometer |
| CN101474067B (en) * | 2008-12-26 | 2011-12-14 | 东南大学 | PVDF array tactile sensor for measuring pulse |
| CN201500137U (en) * | 2009-08-26 | 2010-06-09 | 刘芳 | Novel stethoscope |
| CN201806717U (en) * | 2010-08-30 | 2011-04-27 | 姜毅 | Multifunctional stethoscope |
| CN102551789A (en) * | 2010-12-31 | 2012-07-11 | 深圳市迈迪加科技发展有限公司 | Novel heart sound sensor |
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- 2014-11-25 CN CN201410683135.2A patent/CN104545825B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211253U (en) * | 1987-10-06 | 1988-06-08 | 上海市长海医院 | Micro-computer monitering system for sphygmogram hemodynamics |
| CN1625368A (en) * | 2002-03-25 | 2005-06-08 | 赫艾纳医疗公司 | Passive physiological monitoring (P2M) system |
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