CN107692983B - Pneumatic finger pulse measuring device - Google Patents
Pneumatic finger pulse measuring device Download PDFInfo
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- CN107692983B CN107692983B CN201711046696.1A CN201711046696A CN107692983B CN 107692983 B CN107692983 B CN 107692983B CN 201711046696 A CN201711046696 A CN 201711046696A CN 107692983 B CN107692983 B CN 107692983B
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- cavity
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- ring
- open shell
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- 238000007789 sealing Methods 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 2
- 239000012528 membrane Substances 0.000 description 5
- 239000003814 drug Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007211 cardiovascular event Effects 0.000 description 1
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035487 diastolic blood pressure Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008753 endothelial function Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 208000010125 myocardial infarction Diseases 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000003845 vascular endothelial function Effects 0.000 description 1
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
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Medical Informatics (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Psychiatry (AREA)
- Cardiology (AREA)
- Power Engineering (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
A pneumatic finger pulse measuring device comprising: semi-open shell, cylindrical slider, air pump and differential pressure sensor, wherein: the sliding block is coaxially arranged in the semi-open shell and divides the inner cavity of the semi-open shell into a left reference pressure cavity and a right measurement cavity for accommodating fingers, an annular sealing film is arranged on the inner wall of the opening of the semi-open shell, the sealing film and the inner wall of the semi-open shell form an annular fixing cavity for accommodating gas to fix the fingers, the differential pressure sensor is respectively connected with the reference pressure cavity and the measurement cavity, the pressure difference between the reference pressure cavity and the measurement cavity is used for obtaining the required actual pressure applied to the fingers, and the air pump is respectively communicated with the reference pressure cavity, the measurement cavity and the fixing cavity.
Description
Technical Field
The invention relates to a technology in the field of medical instruments, in particular to a pneumatic finger pulse measuring device.
Background
Measuring pulse waves of a human body is a very important medical examination means in modern medicine. The physiological and pathological information of human body is extracted from pulse wave as the basis of clinical diagnosis and treatment, and is paid attention to by the traditional Chinese medicine and external medicine. The pulse signal is an important physiological signal of a human body, contains rich circulatory system information, and has the advantages of no pain, simple acquisition, low cost and the like because the pulse can be touched on the body surface. However, the pulse signal is easy to be interfered by bioelectric signals of a human body, electric fields and magnetic fields when being detected, the anti-interference capability and the noise suppression capability of the system are extremely high when the pulse signal is monitored, and meanwhile, the sensitivity and the resolution capability of the system are relatively good.
Medical research has found that: over 50% of men and over 64% of women die from coronary heart disease without early symptoms. About 50% of patients with myocardial infarction have no traditional high risk factors. Moreover, in the case of traditional high risk and normal endothelial function, the incidence of severe cardiovascular events is 25%. The measurement of the vascular endothelial function RHI depends on the accurate measurement of the pulse wave.
Disclosure of Invention
Aiming at the problems of high requirement on tightness, easy leakage caused by the influence of an assembly process and the like in the prior art, the invention provides the pneumatic finger pulse measuring device which eliminates the interference of external factors such as temperature, pressure and the like, has no baseline drift, and directly obtains the waveform of pulse wave by detecting the vibration of air wave, thereby improving the accuracy of measured data.
The invention is realized by the following technical scheme:
the invention relates to a pneumatic finger pulse measuring device, comprising: semi-open shell, cylindrical slider, air pump and differential pressure sensor, wherein: the sliding block is coaxially arranged in the semi-open shell and divides the inner cavity of the semi-open shell into a left reference pressure cavity and a right measurement cavity for accommodating fingers, an annular sealing film is arranged on the inner wall of the opening of the semi-open shell, the sealing film and the inner wall of the semi-open shell form an annular fixing cavity for accommodating gas to fix the fingers, the differential pressure sensor is respectively connected with the reference pressure cavity and the measurement cavity, the pressure difference between the differential pressure sensor and the reference pressure cavity is used for obtaining the required actual pressure applied to the fingers, and the air pump is respectively communicated with the reference pressure cavity, the measurement cavity and the fixing cavity.
And a sealing ring is arranged between the peripheral surface of the sliding block and the inner wall of the semi-open shell.
The reference pressure cavity is sequentially connected with a first two-position three-way valve and a third two-position three-way valve, the measurement cavity is connected with a second two-position three-way valve, and the air pump is respectively connected with the third two-position three-way valve, the second two-position three-way valve and the fixing cavity through the one-way valve.
The semi-open shell is of a tubular structure, two annular grooves are formed in the inner wall of the semi-open shell, and two axial ends of the sealing membrane are respectively fixed in the annular grooves.
The two axial ends of the sealing film are glued in the annular groove.
Drawings
FIG. 1 is a schematic diagram of a finger pulse measuring device according to the present invention;
FIG. 2 is a schematic view of a seal film mounting ring structure;
in the figure: the device comprises a semi-open shell 1, a gas pump 2, a reference pressure cavity 3, a measuring cavity 4, a sliding block 5, a one-way valve 6, a first two-position three-way valve 7, a second two-position three-way valve 8, a sealing membrane 9, a fixed cavity 10, a third two-position three-way valve 11, a differential pressure sensor 12, a sealing membrane mounting ring 13, a ring body 14 and a ring rib 15.
Detailed Description
As shown in fig. 1, the present embodiment includes: a semi-open housing 1, a cylindrical slider 5, an air pump 2 and a differential pressure sensor 12, wherein: the sliding block 5 is coaxially arranged in the semi-open type shell 1 and divides the inner cavity of the semi-open type shell 1 into a left reference pressure cavity 3 and a right measurement cavity 4, an annular sealing film 9 is arranged on the inner wall of the opening of the semi-open type shell 1, the sealing film 9 and the inner wall of the semi-open type shell 1 form an annular fixing cavity 10 for containing gas to fix fingers, a differential pressure sensor 12 is respectively connected with the reference cavity and the fixing cavity 10, and the air pump 2 is respectively communicated with the reference pressure cavity 3, the measurement cavity 4 and the fixing cavity 10.
The left end of the semi-open shell 1 is completely closed, the right end of the semi-open shell is opened, and the sliding block 5 is slidably arranged in the inner cavity of the semi-open shell 1, so that the inner cavity of the semi-open shell 1 is divided into a left reference pressure cavity 3 and a right measuring cavity 4. The parameters in the reference pressure cavity 3 are consistent with the gas in the measuring cavity 4, so that the pulse wave can be obtained by directly subtracting the waveforms in the measuring cavity 4 and the reference pressure cavity 3 when the pulse wave is processed finally, and the influence of external factors such as temperature, pressure, gas flow rate and the like on the measurement is eliminated.
The sliding block 5 can axially slide along the semi-open shell 1, and a sealing ring is arranged between the outer peripheral surface of the sliding block 5 and the inner wall of the semi-open shell 1, so that the reference pressure cavity 3 and the measuring cavity 4 are completely isolated. The pressure and temperature in the reference pressure chamber 3 and the measuring chamber 4 can be kept the same by means of a slide 5, which can be slid axially along the semi-open housing 1.
The inner wall of the semi-open shell 1 is provided with two annular grooves, two axial ends of the sealing film 9 are respectively fixed in the annular grooves, and the two axial ends of the sealing film 9 are glued in the annular grooves, so that a fixing cavity 10 which can be filled with gas to fix fingers is formed between the two annular grooves. The sealing membrane 9 is mounted by a sealing membrane mounting ring 13.
As shown in fig. 2, the sealing film mounting ring 13 includes: a ring body 14 and two annular ribs 15 corresponding to the two annular grooves, wherein: the annular rib 15 is arranged on the outer peripheral surface of the ring body 14, and the ring body 14 and the annular rib 15 are made of memory alloy.
The present embodiment relates to the method for installing the sealing film 9, in which the sealing film 9 is sleeved on the outer surface of the ring body 14, and is matched with the annular rib 15, the annular rib 15 is positioned at the two annular grooves of the semi-open shell 1, then the ring body 14 and the annular rib 15 are heated to expand, the sealing film 9 on the outer surface is jacked into the two annular grooves, after the sealing film 9 is tightly matched with the groove wall surface through glue, the ring body 14 is cooled to be capable of being taken out, and the sealing film installation ring 13 is taken out from the measurement cavity 4.
The reference pressure cavity 3 is sequentially connected with a first two-position three-way valve 7 and a third two-position three-way valve 11, the measurement cavity 4 is connected with a second two-position three-way valve 8, and the air pump 2 is respectively connected with the third two-position three-way valve 11, the second two-position three-way valve 8 and the fixed cavity 10 through the one-way valve 6.
During measurement, a finger stretches into the measurement cavity 4, the air pump 2 is opened, gas enters the measurement cavity 4, the reference pressure cavity 3 and the fixed cavity 10, the finger is fixed after the fixed cavity 10 is inflated, the differential pressure sensor 12 feeds back vibration of air wave, and pulse wave signals are obtained after a signal modem, amplification and filtering are carried out. After the measurement is completed, the gas of the three chambers is discharged, and the finger is taken out of the measurement cavity 4.
Compared with the prior art, the device can eliminate the interference of external factors such as temperature, pressure and the like, has no baseline drift, and directly obtains the waveform of the pulse wave by detecting the vibration of the air wave, thereby improving the accuracy of measurement data; meanwhile, a proper air pressure interval can be selected according to the diastolic pressure characteristics of different crowd groups, so that the influence of special personal factors of each person on experimental results is eliminated; the product assembly process is simple, the problem of low product assembly yield is solved greatly, and the cost is low; the vibration characteristics of the air wave are directly measured, and the influence of the change of physical characteristics such as the elasticity coefficient of the rubber film due to long-term use on experimental results is eliminated. In summary, the technology can greatly reduce the influence of some irrelevant factors on experiments and improve the accuracy and the credibility of measured data.
The foregoing embodiments may be partially modified in numerous ways by those skilled in the art without departing from the principles and spirit of the invention, the scope of which is defined in the claims and not by the foregoing embodiments, and all such implementations are within the scope of the invention.
Claims (5)
1. A pneumatic finger pulse measuring device, comprising: semi-open shell, cylindrical slider, air pump and differential pressure sensor, wherein: the sliding block is coaxially arranged in the semi-open shell and divides the inner cavity of the semi-open shell into a left reference pressure cavity and a right measurement cavity for accommodating fingers, an annular sealing film is arranged on the inner wall of the opening of the semi-open shell, the sealing film and the inner wall of the semi-open shell form an annular fixed cavity for accommodating gas to fix the fingers, the differential pressure sensor is respectively connected with the reference pressure cavity and the fixed cavity, the required actual pressure applied to the fingers is obtained through the pressure difference of the reference pressure cavity and the fixed cavity, and the air pump is respectively communicated with the reference pressure cavity, the measurement cavity and the fixed cavity;
the sealing film is arranged in the following way: the sealing film is sleeved on the outer surface of the ring body of the sealing film mounting ring and matched with the ring ribs of the sealing film mounting ring, the ring ribs are positioned at the two annular grooves of the semi-open type shell, then the ring body and the ring ribs are heated to expand, the sealing film on the outer surface is jacked into the two annular grooves, the sealing film is tightly matched with the wall surfaces of the grooves through glue, the ring body is cooled until the sealing film can be taken out, and the sealing film mounting ring is taken out from the measuring cavity;
the sealing film mounting ring comprises: the ring body and two ring ribs corresponding to two annular grooves, wherein: the annular rib is arranged on the outer peripheral surface of the ring body, and the ring body and the annular rib are both made of memory alloy.
2. The pneumatic finger pulse measuring device according to claim 1, wherein a sealing ring is arranged between the outer peripheral surface of the sliding block and the inner wall of the semi-open shell.
3. The pneumatic finger pulse measuring device according to claim 2, wherein the reference pressure chamber is sequentially connected with a first two-position three-way valve and a third two-position three-way valve, the measuring chamber is connected with a second two-position three-way valve, and the air pump is respectively connected with the third two-position three-way valve, the second two-position three-way valve and the fixed chamber through one-way valves.
4. The pneumatic finger pulse measuring device according to claim 3, wherein the inner wall of the semi-open type shell is provided with two annular grooves, and two axial ends of the sealing film are respectively fixed in the annular grooves.
5. The pneumatic finger pulse measuring device according to claim 4, wherein the sealing film is glued in the annular groove at two axial ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046696.1A CN107692983B (en) | 2017-10-31 | 2017-10-31 | Pneumatic finger pulse measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046696.1A CN107692983B (en) | 2017-10-31 | 2017-10-31 | Pneumatic finger pulse measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107692983A CN107692983A (en) | 2018-02-16 |
| CN107692983B true CN107692983B (en) | 2024-04-05 |
Family
ID=61176416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711046696.1A Active CN107692983B (en) | 2017-10-31 | 2017-10-31 | Pneumatic finger pulse measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107692983B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010083836A (en) * | 2001-07-03 | 2001-09-03 | 김효근 | Pressure pulse wave detecting device using pneumatic system |
| CN1524490A (en) * | 2003-02-25 | 2004-09-01 | 北京泰达新兴医学工程技术有限公司 | Pressure type pulse detecting equipment and sphygmobolometer using the same |
| CN101703396A (en) * | 2009-11-06 | 2010-05-12 | 中国科学院合肥物质科学研究院 | Radial artery pulse wave based cardiovascular function parameter detection and analysis method and detection device |
| KR20110026737A (en) * | 2009-09-08 | 2011-03-16 | 한국생산기술연구원 | Device for measurement for sphygmus |
| CN103349546A (en) * | 2013-07-16 | 2013-10-16 | 吕品 | Device and method for measuring pulse waves and blood pressures |
| CN106388789A (en) * | 2016-11-17 | 2017-02-15 | 上海中嘉衡泰医疗科技有限公司 | Pulse wave measurement device and method |
| CN208492072U (en) * | 2017-10-31 | 2019-02-15 | 上海中嘉衡泰医疗科技有限公司 | Vapour-pressure type finger pulse measurement device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130027679A (en) * | 2011-09-08 | 2013-03-18 | 한국전자통신연구원 | Apparatus for measuring pulse and method for acquiring pulse information thereof |
-
2017
- 2017-10-31 CN CN201711046696.1A patent/CN107692983B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010083836A (en) * | 2001-07-03 | 2001-09-03 | 김효근 | Pressure pulse wave detecting device using pneumatic system |
| CN1524490A (en) * | 2003-02-25 | 2004-09-01 | 北京泰达新兴医学工程技术有限公司 | Pressure type pulse detecting equipment and sphygmobolometer using the same |
| KR20110026737A (en) * | 2009-09-08 | 2011-03-16 | 한국생산기술연구원 | Device for measurement for sphygmus |
| CN101703396A (en) * | 2009-11-06 | 2010-05-12 | 中国科学院合肥物质科学研究院 | Radial artery pulse wave based cardiovascular function parameter detection and analysis method and detection device |
| CN103349546A (en) * | 2013-07-16 | 2013-10-16 | 吕品 | Device and method for measuring pulse waves and blood pressures |
| CN106388789A (en) * | 2016-11-17 | 2017-02-15 | 上海中嘉衡泰医疗科技有限公司 | Pulse wave measurement device and method |
| CN208492072U (en) * | 2017-10-31 | 2019-02-15 | 上海中嘉衡泰医疗科技有限公司 | Vapour-pressure type finger pulse measurement device |
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| CN107692983A (en) | 2018-02-16 |
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