CN203016941U - Photoelectric type heart rate measuring circuit - Google Patents
Photoelectric type heart rate measuring circuit Download PDFInfo
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- CN203016941U CN203016941U CN 201220647332 CN201220647332U CN203016941U CN 203016941 U CN203016941 U CN 203016941U CN 201220647332 CN201220647332 CN 201220647332 CN 201220647332 U CN201220647332 U CN 201220647332U CN 203016941 U CN203016941 U CN 203016941U
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Abstract
The utility model discloses a photoelectric type heart rate measuring circuit, and relates to the heart rate measuring technology. In accordance with the Lambert-Beer law, a photoelectric type heart rate measuring device which is used for the fingertips of a human body and is easy to carry and convenient to measure is provided. The technical scheme is that the photoelectric type heart rate measuring circuit comprises a photoelectric transducer, a signal preprocessing unit and a data processing unit. The photoelectric transducer comprises an infrared ray transmitting circuit and an infrared ray receiving circuit, a signal output end of the infrared ray receiving circuit is connected with an input end of the signal preprocessing unit, and an output end of the signal preprocessing unit is connected with an input end of the data processing unit.
Description
Technical field
This utility model relates to the heart rate measurement technology, especially a kind of heart rate measurement circuit based on photosignal.
Background technology
Heart rate is an important parameter of reaction human health status.The method of existing measurement heart rate mainly comprises feels the pulse or stethoscope.Such measuring method all relies on heart beating or the pulsation number of times in artificial statistics one minute, has larger error.In addition, when adopting stethoscope, stethoscope earpiece need to be pressed close to patient skin as much as possible, especially during winter, for the patient brings a lot of inconvenience.If the patient is the child, because receiver is ice-cold, the child often cries and screams, and makes diagnosis be difficult to carry out.
According to lambert Bill (Lamber Beer) law, material is directly proportional at the absorbance at certain wavelength place and its concentration.We can legitimate inference so: when the illumination of constant wavelength is mapped on tissue, the light intensity that absorbs, measures after reflection loss by tissue will reflect the architectural feature of illuminated position tissue to a certain extent.
Those skilled in the art all know heart rate synchronizes with pulse, is equivalent to the measurement pulse therefore measure the human heart rate.And pulse mainly contains human body artery diastole and contraction generation, and at the human body finger tip, the tremulous pulse component content of tissue is higher, and relative other people soma of finger tip thickness is thinner, sees through the light intensity that detects after finger relatively large.
Summary of the invention
The purpose of this utility model is to provide a kind of photo-electric heart rate measurement device for the human body finger tip according to the defective of prior art and lambert Bill (Lamber Beer) law.
The technical solution adopted in the utility model is such: comprise electro-optical pickoff, Signal Pretreatment unit and data processing unit; Described electro-optical pickoff comprises infrared transmitter and infrared radiation receiving circuit; The signal output part of infrared radiation receiving circuit is connected with the input of Signal Pretreatment unit; The outfan of Signal Pretreatment unit is connected with the input of data processing unit.
Preferably, described electro-optical pickoff is arranged in and detects box, and the center of described detection box one side has the hole, and bore dia is 1.5 ~ 1.8cm; In the detection box, have upper spacer and lower clapboard; Upper spacer is positioned at the top in hole, and lower clapboard is positioned at the below in hole; And the identical through hole of size is all arranged on upper spacer and lower clapboard, and described two through hole lines of centres straight down; Collecting lens also is installed on the through hole of upper spacer; Be fixed with infrared transmitter in the space of the inner upper spacer of detection box top; Be installed with infrared radiation receiving circuit in space below detecting the inner lower clapboard of box.
Preferably, described infrared transmitter comprises switch, collective optics, light emitting diode, stabilivolt, the first current-limiting resistance and the second current-limiting resistance; The anode of described light emitting diode is connected with direct voltage source by switch; The negative electrode of light emitting diode is connected with ground by the first current-limiting resistance; The negative electrode of described stabilivolt is connected with direct voltage source by the second current-limiting resistance, the plus earth of stabilivolt; Described light emitting diode be positioned at collecting lens directly over.
Preferably, infrared radiation receiving circuit comprises phototriode and the 3rd resistance; The colelctor electrode of described phototriode is connected grounded emitter with direct voltage source; Described phototriode be positioned at the lower clapboard through hole under.
Preferably, also be provided with collecting lens on the through hole of described lower clapboard.
Preferably, described signal processing unit comprises filter circuit and amplifying circuit; The input of described filter circuit is connected with the outfan of infrared radiation receiving circuit; The outfan of filter circuit is connected with the input of amplifying circuit; The outfan of amplifying circuit is connected with the input of data processing unit.
Preferably, described signal processing unit comprises filter circuit and amplifying circuit; The input of described amplifying circuit is connected with the outfan of infrared radiation receiving circuit; The outfan of amplifying circuit is connected with the input of filter circuit; The outfan of filter circuit is connected with the input of data processing unit.
Preferably, described data processing unit comprises enumerator and central processing unit; The pulse signal input terminal of enumerator is connected with any end of the 3rd resistance; The pulse number outfan of enumerator is connected with the input of central processing unit.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
Easy to detect, circuit structure is simple, be easy to carry, and this utility model also provides a kind of improved detection box structure, makes accuracy of detection greatly improve.
Description of drawings
This utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is this utility model theory diagram.
Fig. 2 is that this utility model detects the box structural representation.
Fig. 3 is the infrared transmitter circuit diagram.
Fig. 4 is the infrared radiation receiving circuit circuit diagram.
Labelling in figure: 1 for detecting the box housing; 2 is the hole on sidewall; 3 is upper spacer; 4 is lower clapboard; 5 is the upper spacer through hole; 6 is the lower clapboard through hole; 7 is infrared transmitter; 8 is infrared radiation receiving circuit.
The specific embodiment
Disclosed all features in this description, or the step in disclosed all methods or process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this description (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or similar characteristics.
As Fig. 1, this utility model comprises electro-optical pickoff, Signal Pretreatment unit and data processing unit; Described electro-optical pickoff comprises infrared transmitter and infrared radiation receiving circuit; The signal output part of infrared radiation receiving circuit is connected with the input of Signal Pretreatment unit; The outfan of Signal Pretreatment unit is connected with the input of data processing unit.
Wherein, the preferred structure of described infrared transmitter is such: comprise K switch, light emitting diode D1, stabilivolt D2, current-limiting resistance R1 and current-limiting resistance R2; The anode of described light emitting diode D1 is connected with direct voltage source by K switch; The negative electrode of light emitting diode D1 is connected with ground by current-limiting resistance R1; The negative electrode of described stabilivolt D2 is connected with direct voltage source by current-limiting resistance R2, the plus earth of stabilivolt D2.
The preferred structure of infrared radiation receiving circuit can be like this: comprise phototriode Q1 and resistance R 3; The colelctor electrode of described phototriode Q1 is connected with direct voltage source, its grounded emitter.
In order to prevent that human finger produces displacement with respect to detection light source in measuring process, this utility model has also proposed special-purpose detection box.As Fig. 2, the detection box structure in this utility model is such: described detection box can be the box of arbitrary shape, and the center of one side has hole 2, and bore dia is 1.5 ~ 1.8cm, is convenient to human finger and enters, but have certain limit effect.
In the detection box, have upper spacer 3 and lower clapboard 4, or upper limit platform and lower limit platform.Concrete, perforate 2 on the sidewall is as the boundary, and upper spacer 3 levels are installed on that to detect box inner and be positioned at the top in hole 2, aligns with the top edge in hole 2 or tangent, the horizontal installation and measuring box of lower clapboard 4 is inner and be positioned at the below in hole 2, aligns with the lower limb in hole 2 or tangent.And the identical through hole 5,6 of size is arranged all on upper spacer 3 and lower clapboard 4, through hole 5,6 effect are that light is passed through, so described two through holes 5,6 lines of centres are because of straight down, to guarantee that Infrared can the through hole by upper spacer sees through finger and enters infrared receiver under the lower clapboard through hole, as phototriode.
Preferably, can on the through hole 5 at upper spacer, collecting lens be installed, make infrared light comparatively concentrated, improve light intensity.
Detect in the space of the inner upper spacer of box 3 tops and be fixed with infrared transmitter 7, photodiode be positioned at the upper spacer through hole directly over.Be installed with infrared radiation receiving circuit 8 in space below detecting the inner lower clapboard 4 of box.Also can be provided with collecting lens on the through hole of described lower clapboard 4, thereby improve detection sensitivity.
Signal processing unit in this device comprises filter circuit and amplifying circuit; Described filter circuit is used for the High-frequency Interference of filtered signal; Concrete, filter circuit can be that a cut-off frequency is the low pass filter of 200Hz.the input of filter circuit is connected with the outfan of electro-optical pickoff, the outfan of filter circuit is connected with the input of amplifying circuit, the effect of amplifying circuit is that signal is suitably amplified, the effect of amplifying circuit is in order to realize Signal Matching, the setting of its gain depends on the size that DC voltage source size that the phototriode pipe collector connects and data processing unit can identification signals, if dc source is 3.3V, the range of signal that data processing unit can be processed is 0 ~ 9V, the signal of infrared radiation receiving circuit being exported amplifies 2 times and can realize preferably Signal Matching.Under the instruction of this part, those skilled in the art are not difficult to know, when if the signal magnitude scope that the signal magnitude scope of infrared radiation receiving circuit output and data processing unit can receive is consistent, can remove amplifying circuit, thereby the heart rate measurement device that obtains more simplifying.Under the instruction of this part, those skilled in the art can arrive by reasonable prediction equally, and the order of connection of amplifying circuit and filter circuit can be put upside down.
Described data processing unit in this utility model comprises enumerator and central processing unit; The pulse signal input terminal of enumerator is connected with any end of resistance R 3; The pulse number outfan of enumerator is connected with the input of central processing unit.Central processing unit further exports heart rate to higher level's circuit to be continued process or show by display device.
This utility model is not limited to the aforesaid specific embodiment.This utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (8)
1. a photo-electric heart rate measurement device, is characterized in that, comprising: electro-optical pickoff, Signal Pretreatment unit and data processing unit; Described electro-optical pickoff comprises infrared transmitter and infrared radiation receiving circuit; The signal output part of infrared radiation receiving circuit is connected with the input of Signal Pretreatment unit; The outfan of Signal Pretreatment unit is connected with the input of data processing unit.
2. photo-electric heart rate measurement device according to claim 1, is characterized in that, described electro-optical pickoff is arranged in and detects box, and the center on described detection box one sidewall has the hole, and bore dia is 1.5 ~ 1.8cm; In the detection box, have upper spacer and lower clapboard; The upper spacer level is fixed in the top of detecting in box and being positioned at the hole, and upper spacer aligns with the top edge in hole; The lower clapboard level is fixed in the below of detecting in box and being positioned at the hole, and lower clapboard aligns with the lower limb in hole; And the identical through hole of size is all arranged on upper spacer and lower clapboard, and described two through hole lines of centres straight down; Collecting lens also is installed on the through hole of upper spacer; Be fixed with infrared transmitter in the space of the inner upper spacer of detection box top; Be installed with infrared radiation receiving circuit in space below detecting the inner lower clapboard of box.
3. photo-electric heart rate measurement device according to claim 2, is characterized in that, described infrared transmitter comprises switch, light emitting diode, stabilivolt, the first current-limiting resistance and the second current-limiting resistance; The anode of described light emitting diode is connected with direct voltage source by switch; The negative electrode of light emitting diode is connected with ground by the first current-limiting resistance; The negative electrode of described stabilivolt is connected with direct voltage source by the second current-limiting resistance, the plus earth of stabilivolt; Described light emitting diode be positioned at collecting lens directly over.
4. according to claim 2 or 3 described photo-electric heart rate measurement device, is characterized in that, infrared radiation receiving circuit comprises phototriode and the 3rd resistance; The colelctor electrode of described phototriode is connected grounded emitter with direct voltage source; Described phototriode be positioned at the lower clapboard through hole under.
5. photo-electric heart rate measurement device according to claim 4, is characterized in that, also is provided with collecting lens on the through hole of described lower clapboard.
6. photo-electric heart rate measurement device according to claim 4, is characterized in that, described signal processing unit comprises filter circuit and amplifying circuit; The input of described filter circuit is connected with the outfan of infrared radiation receiving circuit; The outfan of filter circuit is connected with the input of amplifying circuit; The outfan of amplifying circuit is connected with the input of data processing unit.
7. photo-electric heart rate measurement device according to claim 4, is characterized in that, described signal processing unit comprises filter circuit and amplifying circuit; The input of described amplifying circuit is connected with the outfan of infrared radiation receiving circuit; The outfan of amplifying circuit is connected with the input of filter circuit; The outfan of filter circuit is connected with the input of data processing unit.
8. photo-electric heart rate measurement device according to claim 7, is characterized in that, described data processing unit comprises enumerator and central processing unit; The pulse signal input terminal of enumerator is connected with any end of the 3rd resistance; The pulse number outfan of enumerator is connected with the input of central processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647332 CN203016941U (en) | 2012-11-30 | 2012-11-30 | Photoelectric type heart rate measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647332 CN203016941U (en) | 2012-11-30 | 2012-11-30 | Photoelectric type heart rate measuring circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203016941U true CN203016941U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220647332 Expired - Fee Related CN203016941U (en) | 2012-11-30 | 2012-11-30 | Photoelectric type heart rate measuring circuit |
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| CN (1) | CN203016941U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102973259A (en) * | 2012-11-30 | 2013-03-20 | 刘庆国 | Photoelectric heart rate measuring circuit |
| CN104323766A (en) * | 2014-11-10 | 2015-02-04 | 上海翰临电子科技有限公司 | Autoreflection heart rate detector |
| CN110236510A (en) * | 2019-04-29 | 2019-09-17 | 平顶山学院 | A kind of fully-automatic intelligent athletic training system |
-
2012
- 2012-11-30 CN CN 201220647332 patent/CN203016941U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102973259A (en) * | 2012-11-30 | 2013-03-20 | 刘庆国 | Photoelectric heart rate measuring circuit |
| CN104323766A (en) * | 2014-11-10 | 2015-02-04 | 上海翰临电子科技有限公司 | Autoreflection heart rate detector |
| CN110236510A (en) * | 2019-04-29 | 2019-09-17 | 平顶山学院 | A kind of fully-automatic intelligent athletic training system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20131130 |