CN107157467A - A kind of photo-electric heart rate measuring instrument - Google Patents
A kind of photo-electric heart rate measuring instrument Download PDFInfo
- Publication number
- CN107157467A CN107157467A CN201710443812.7A CN201710443812A CN107157467A CN 107157467 A CN107157467 A CN 107157467A CN 201710443812 A CN201710443812 A CN 201710443812A CN 107157467 A CN107157467 A CN 107157467A
- Authority
- CN
- China
- Prior art keywords
- circuit
- controller
- measuring instrument
- heart rate
- photo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012545 processing Methods 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000010247 heart contraction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002834 transmittance Methods 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
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
- A61B5/02427—Details of sensor
- A61B5/02433—Details of sensor for infrared radiation
-
- 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
-
- 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
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/7405—Details of notification to user or communication with user or patient ; user input means using sound
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient ; user input means
- A61B5/742—Details of notification to user or communication with user or patient ; user input means using visual displays
Abstract
The invention discloses a kind of photo-electric heart rate measuring instrument, it includes：Signal pickup circuit, filter circuit, amplifying circuit, acousto-optic hint circuit, controller, keyboard, nixie display.The signal pickup circuit connects filter circuit, and the filter circuit connects amplifying circuit, and the amplifying circuit connects controller, and the controller is also connected with acousto-optic hint circuit, keyboard and nixie display.When measuring instrument works, signal pickup circuit obtains heart rate signal, send controller after filtered circuit, amplifying circuit processing, calculating HR values by controller send nixie display to show and provide acousto-optic hint.The measuring instrument has the advantages that easy to use, intuitive display, low in energy consumption.
Description
Technical field
The present invention relates to single-chip microcomputer control technology, the technical field such as electronic technology, more particularly to a kind of photo-electric heart rate is surveyed
Measure instrument.
Background technology
The method of the measurement heart rate generally used needs to use electrode or piezoelectric transducer directly to contact human body, can be to human body
Certain constraint is produced, so that subject produces certain psychological burden.In the last few years with the development of science and technology, occur one
A little contactless measurements, be widely used prospect.Blood is a kind of height opaque liquid, and near infrared light exists
Penetrability in general tissue is than several ten times larger in blood.Volumetric blood inside finger is under heartbeat in periodically change
Change, blood volume reduces in finger during diastole, infrared light transmittance increase is opposite during heart contraction.Therefore, it can will be infrared
The change of the change reflection pulse of light intensity.The infrarede emitting diode of finger side sends stable infrared light, through finger by
The PIN pipes of opposite side are received and pass through light intensity, then light intensity signal is converted into electric signal, by this electric signal extraction and analysis
Complete the non-contact measurement of heart rate.
The content of the invention
In view of people to low cost, high-precision heart rate measuring instrument the need for, devise a kind of photo-electric heart rate measuring instrument.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：
A kind of photo-electric heart rate measuring instrument, it includes：Signal pickup circuit, filter circuit, amplifying circuit, acousto-optic hint circuit,
Controller, keyboard, nixie display；The signal pickup circuit connects filter circuit, and the filter circuit connects amplifying circuit,
The amplifying circuit connects controller, and the controller is also connected with acousto-optic hint circuit, keyboard and nixie display.
It is preferred that, when measuring instrument works, signal pickup circuit obtains heart rate signal, filtered circuit, amplifying circuit processing
After send controller, calculating HR values by controller send nixie display to show and provides acousto-optic hint.
It is preferred that, the controller is singlechip chip, concrete model selection AVR single chip ATmega16.
Above-mentioned technical proposal has the advantages that：The measuring instrument has easy to use, intuitive display, power consumption low excellent
Point.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail such as
Afterwards.The embodiment of the present invention is shown in detail by following examples and its accompanying drawing.
Brief description of the drawings
Fig. 1 is structural representation of the embodiment of the present invention.
Fig. 2 is signal pickup circuit of the embodiment of the present invention.
Embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the invention discloses a kind of photo-electric heart rate measuring instrument, it includes：1 signal pickup circuit, 2 filters
Wave circuit, 3 amplifying circuits, 4 acousto-optic hint circuits, 5 controllers, 6 keyboards, 7 nixie displays.The picking up signal electricity
Road connects filter circuit, and the filter circuit connects amplifying circuit, and the amplifying circuit connects controller, the controller also with
Acousto-optic hint circuit, keyboard are connected with nixie display.When measuring instrument works, signal pickup circuit obtains heart rate signal, through filter
Controller is sent after wave circuit, amplifying circuit processing, calculating HR values by controller send nixie display to show and to speaking
Light is pointed out.The measuring instrument has the advantages that easy to use, intuitive display, low in energy consumption.
As shown in Fig. 2 signal pickup circuit is provided 5V DC voltage, infrared-emitting diode string by external direct current power supply
Join biasing resistor transmitting optical signal, actual measurement operating current is about 50mA.Infrared receiving diode reverse bias receives optical signal, real
It is about 0.5mA to survey operating current, converts optical signal into electric signal, filter circuit, measured signal width are given through electric capacity stopping direct current
Value is about 15 mV.
Signal filter circuit uses second-order active filter, R and C value is set according to actual needs so that cut-off frequency is about
For 7Hz, and there is reverse amplifying power.Amplifying circuit comparator LM324 adds 2.5V reference potential in positive input.
LM324 is powered using single supply, needs also exist for setting reference potential.Because output voltage range is about 0.8~4.0V, therefore ginseng
Examine level and be set to 1.6~2.5V or so, using 220k Ω and 100k Ω resistant series partial pressure, level is non-constant, there is noise
Shake, but within allowed band.The first order amplifies 20 times in actual measurement, and the second level amplifies 10 times.In order to adjust waveform, most
After used simple phase inverter.
Controller is SCM system, selection high-performance, the AVR single chip ATmega16 of low-power consumption when system is implemented.It is single
Piece machine system contains reset circuit, program burn writing circuit, button, LED charactrons, buzzer.In order that LED charactrons have
Enough brightness, it is desirable to can provide 10~20mA driving current with the circuit of its interface, so needing to use a piece of latch
74HCT573 drives light-emitting diode display.
A kind of photo-electric heart rate measuring instrument provided above the embodiment of the present invention is described in detail, for ability
The those skilled in the art in domain, according to the thought of the embodiment of the present invention, have change in specific embodiments and applications
Part, in summary, this specification content should not be construed as the limitation to invention, it is all according to design philosophy of the present invention done it is any
Change all within protection scope of the present invention.
Claims (3)
1. a kind of photo-electric heart rate measuring instrument, it includes：Signal pickup circuit, filter circuit, amplifying circuit, acousto-optic hint electricity
Road, controller, keyboard, nixie display；The signal pickup circuit connects filter circuit, the filter circuit connection amplification electricity
Road, the amplifying circuit connects controller, and the controller is also connected with acousto-optic hint circuit, keyboard and nixie display.
2. a kind of photo-electric heart rate measuring instrument according to claim 1, it is characterised in that when measuring instrument works, signal is picked up
Sense circuit obtains heart rate signal, send controller after filtered circuit, amplifying circuit processing, calculating HR values by controller send
Nixie display shows and provides acousto-optic hint.
3. a kind of photo-electric heart rate measuring instrument according to claim 1, it is characterised in that the controller is monolithic movement
Piece, concrete model selection AVR single chip ATmega16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710443812.7A CN107157467A (en) | 2017-06-13 | 2017-06-13 | A kind of photo-electric heart rate measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710443812.7A CN107157467A (en) | 2017-06-13 | 2017-06-13 | A kind of photo-electric heart rate measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107157467A true CN107157467A (en) | 2017-09-15 |
Family
ID=59826022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710443812.7A Pending CN107157467A (en) | 2017-06-13 | 2017-06-13 | A kind of photo-electric heart rate measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107157467A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2832050Y (en) * | 2005-07-18 | 2006-11-01 | 北京工业大学 | Portable apparatus for detecting cardiovascular blood stream parameter |
| CN101524267A (en) * | 2008-03-04 | 2009-09-09 | 黄林 | Comprehensive evaluating system and proposal for checking personal physical and psychological health |
| CN201551658U (en) * | 2009-12-10 | 2010-08-18 | 武汉大学 | Real-time monitoring system for medical infusion |
| CN204463365U (en) * | 2015-01-16 | 2015-07-08 | 南昌航空大学 | A kind of family can communicate children's safety intelligent protection device |
| CN105251089A (en) * | 2015-10-30 | 2016-01-20 | 西安交通大学 | Breath controller-based on heartbeat monitoring |
-
2017
- 2017-06-13 CN CN201710443812.7A patent/CN107157467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2832050Y (en) * | 2005-07-18 | 2006-11-01 | 北京工业大学 | Portable apparatus for detecting cardiovascular blood stream parameter |
| CN101524267A (en) * | 2008-03-04 | 2009-09-09 | 黄林 | Comprehensive evaluating system and proposal for checking personal physical and psychological health |
| CN201551658U (en) * | 2009-12-10 | 2010-08-18 | 武汉大学 | Real-time monitoring system for medical infusion |
| CN204463365U (en) * | 2015-01-16 | 2015-07-08 | 南昌航空大学 | A kind of family can communicate children's safety intelligent protection device |
| CN105251089A (en) * | 2015-10-30 | 2016-01-20 | 西安交通大学 | Breath controller-based on heartbeat monitoring |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170915 |