CN104510459A - Apparatus and method for measuring pulse rate - Google Patents
Apparatus and method for measuring pulse rate Download PDFInfo
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- CN104510459A CN104510459A CN201410318566.9A CN201410318566A CN104510459A CN 104510459 A CN104510459 A CN 104510459A CN 201410318566 A CN201410318566 A CN 201410318566A CN 104510459 A CN104510459 A CN 104510459A
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- light sensing
- pulse
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 210000003462 vein Anatomy 0.000 claims description 26
- 239000003990 capacitor Substances 0.000 claims description 18
- 241000209094 Oryza Species 0.000 claims description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims description 10
- 235000009566 rice Nutrition 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 239000000615 nonconductor Substances 0.000 claims description 3
- 210000000707 wrist Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008447 perception 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
- 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
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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
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7221—Determining signal validity, reliability or quality
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
-
- 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
- A61B5/02438—Detecting, measuring or recording pulse rate or heart rate with portable devices, e.g. worn by the patient
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
-
- 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
- A61B5/7445—Display arrangements, e.g. multiple display units
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/683—Means for maintaining contact with the body
- A61B5/6831—Straps, bands or harnesses
Abstract
The present invention provides an apparatus for measuring the pulse rate. The apparatus comprises a microprocessor, a light source, a photo sensing unit, an output means and a casing. The microprocessor is configured to determine whether the photo sensing unit is in contact with the users skin, and if the photo sensing unit is determined as being in contact with the users skin, the microprocessor is configured to adjust light intensity of the light source until the microprocessor successfully recognizes a predetermined number of continuous pulses and thereafter perform pulse rate calculation to obtain an output pulse rate for outputting to the output means. The invention also provides a method for measuring the pulse rate.
Description
Technical field
The present invention relates to a kind of medical health device, relate more specifically to a kind of device measuring pulse rate.The invention still further relates to a kind of method measuring pulse rate.
Background technology
Along with the health perception of people improves, be proposed on the market much for assessment of the device of health.These device analysis related datas, and analysis result is provided.These devices a lot of are all for individual.Such as, such device can be finger-clipped, is during movement worn on the finger of user, then the health of monitoring user continuously.Refer to be folded with light source, for light emission to user finger tip, be also provided with OPTICAL SENSORS, the light that the blood for sensing the capillary vessel under finger tip reflects, with detecting pulse rate.But, the reliability of these devices be easy to by various factors as the interference of external light source affect.In addition, because these devices are often designed to a specific part of health as temporo district, upper wrist etc., so sometimes for user is made troubles.
Summary of the invention
In view of the above-mentioned shortcoming of prior art, the invention provides a kind of apparatus and method measuring pulse rate, it can use on health different parts, and provides reliable measurement.The present invention is by the vein of several millimeters under light emission to user skin and capillary vessel realization; Vein and the capillary vessel change in volume during pulsing causes also being changed by the light intensity of the light reflected; The present invention, by measuring by the light that reflects and the change calculating light intensity, measures the pulse rate of user.
For realizing this point, pulse rate measuring device of the present invention comprises:
Microprocessor;
For the light source of light emission to the vein under user skin and capillary vessel, it is electrically connected with microprocessor;
For detecting the light sensing unit of the light that is transmitted into vein and capillary vessel and the light from vein and capillary vessel reflection, it is electrically connected with microprocessor;
The output device be electrically connected with microprocessor;
Hold the housing of microprocessor, light source, light sensing unit and output device;
Wherein microprocessor be arranged to determine light sensing unit whether with user contact skin, if and light sensing unit is determined and user contact skin, microprocessor is arranged to the light intensity of adjustment light source, until microprocessor successfully identifies the continuous pulse of preset number, and after carry out pulse rate calculating again, to obtain the output pulse rate outputting to output device.
The electronic signal of light sensing unit output voltage waveforms, it has the direct current component representing ambient light intensity, and representative is from the AC portion of intensity of the light of vein and capillary vessel reflection.
The direct current component that microprocessor is configured to the voltage waveform by determining the electronic signal exported from light sensing unit whether zero or lower than predetermined threshold value, determine light sensing unit whether with user contact skin; If the direct current component of voltage waveform of the electronic signal that light sensing unit exports is zero or lower than predetermined threshold value, this represent light sensing unit do not detect ambient light or the ambient light that detects very weak, therefore light sensing unit is confirmed as and user contact skin; If the voltage waveform of the direct current component of the electronic signal of light sensing unit output exceeds predetermined threshold value, this representative detects strong ambient light, therefore light sensing unit is confirmed as not and user contact skin.
Light source is connected to microprocessor by rheostat; Light sensing unit is connected to microprocessor by voltage amplifier; Voltage amplifier amplifies and filters the voltage waveform of electronic signal exported from light sensing unit, with by microprocessor identification.
Microprocessor to be exported from light sensing unit by detecting and to be amplified by voltage amplifier and the rising edge of the voltage waveform of electronic signal that filters, peak value and drop edge identify pulse.
Microprocessor, by the resistance value of adjustment rheostat, adjusts the light intensity of light source.
Microprocessor carries out pulse rate calculating by following steps, obtains output pulse rate, and outputs to output device:
What i continuous pulse that () is preset number was right obtains pulse rate every a pair, the pulse rate wherein obtaining often pair of continuous pulse is time period in seconds between peak value by measuring the first right pulse of continuous pulse and the peak value of the second pulse that pulse is right continuously, and by time period of measuring divided by 60;
(ii) by calculating the meansigma methods of the right pulse rate of the continuous pulse of preset number, the output pulse rate outputting to output device is obtained;
(iii) as needs, (i) and (ii) preset times is repeated, to upgrade the output pulse rate outputting to output device.
In an embodiment, voltage amplifier is operational amplifier, and it comprises input, the first secondary operational amplifier, the first capacitor, the first resistor, low pass filter, active low-pass filter and outfan.Input collects the voltage waveform of the electronic signal exported from light sensing unit, and is connected to the first secondary operational amplifier.First secondary operational amplifier is used as voltage follower, and it eliminates the unnecessary impact produced because of the impedance variation of light sensing unit.First capacitor is used for the direct current component of the voltage waveform of block electrons signal; Direct current component is for measuring the unnecessary signal of pulse rate.First capacitor is by the first resistance-grounded system.First resistor is used for the first capacitor discharge, makes the first capacitor charged in course of normal operation can not produce extra unidirectional current to active low-pass filter, and can not produce error signal at outfan.Low pass filter is made up of the second resistor and the second capacitor, is used for suppressing the unnecessary high-frequency noise from light sensing unit generation.Active low-pass filter is made up of the second secondary operational amplifier, feedback resistor and feedback condenser; Active low-pass filter is used for, for microprocessor amplifies voltage waveform, then suppressing unnecessary high-frequency noise.Outfan transmits voltage waveform to microprocessor from active low-pass filter.
Light source can comprise one or more light source.
Light source is at the 400 how wavelength operation of rice to 900 how between rice that are situated between.Wavelength be situated between 400 how the light of rice to 900 how between rice can to penetrate under the skin surface of user several millimeters, this scope comprises the skin corium and epidermal area with a large amount of vein and capillary vessel.The corresponding pulse of volume of vein and capillary vessel changes, and the light amount of vein and capillary vessel reflection (wavelength be situated between 400 how rice to 900 how between rice) changes according to the change in volume of vein and capillary vessel.Therefore, pulse rate is measured by measuring by the intensity variation of the light reflected.
Light source and light sensing unit are separated from each other setting, preferably separate 2 millimeters, wherein light trap is arranged between light source and light sensing unit, directly light sensing unit is entered to prevent the light of light source, guarantee that light that light sensing unit senses is the reflection from skin, thus improve the accuracy that pulse rate measures.
Light trap is dark, soft, elastic electrical insulator; It can be made up of the material being such as ethylene-vinyl acetate copolymer (EVA) or epoxy resin.Dark color prevents the light of light source from directly entering light sensing unit, guarantees that light that light sensing unit senses is the reflection from skin, thus improves the accuracy that pulse rate measures.Soft, elastic material guarantees that light source and light sensing unit are suitably mutually isolated, and suitably shields light source and light sensing unit, from dust and influence of moisture.Electrical insulation characteristics protection light source and light sensing unit, from Effect of Short Circuit.
Light sensing unit can be photodiode or phototransistor.
Output device comprises and transmits the pulse rate that calculated by the microprocessor wireless communication module to external device (ED).
External device (ED) is PC or flow device, and the pulse rate from radio communication mold block movement is analyzed, shows and stored to its operation flowing software application formula.
Output device comprises the audio output unit exporting pulse rate with audible.
Housing is spectacle-frame; Output device comprises miniature projecting unit, and it exports pulse rate with image mode; Image is formed on the viewing area of spectacle-frame by miniature projecting unit throw light; Spectacle-frame is provided with two earpieces, is wherein often only equipped with elasticity outthrust; Light source and light sensing unit are arranged on towards on one of them elasticity outthrust of user skin; Elasticity outthrust is used as clip, to guarantee the temporo skin region close contact of light source and light sensing unit and user.
Housing is to be worn on the accessory on health different parts; Accessory can be connected to adjustable band, and adjustable band can be worn on health different parts, and it comprises shank, wrist, upper arm, chest, lower limb etc.
Housing also arranges moving sensing unit, for measuring the movement of user; The output of moving sensing unit is sent to output device.
The present invention also provides the method measuring pulse rate, and it comprises the following steps:
I () is from source emissioning light line to the vein user skin and capillary vessel;
(ii) light being transmitted into vein and capillary vessel and the light reflected from vein and capillary vessel is detected by light sensing unit;
(iii) determine light sensing unit whether with user contact skin;
(iv) if light sensing unit is determined and user contact skin, the light intensity of adjustment light source, until the continuous pulse of preset number is successfully identified;
V () carries out pulse rate calculating, to obtain output pulse rate.
Step (ii) also comprises the electronic signal of output voltage waveforms, and it has the direct current component representing ambient light intensity, and representative is by the AC portion of intensity of light sensing unit from the light of vein and capillary vessel reflection.
The direct current component that step (iii) also comprises the voltage waveform determining the electronic signal exported from light sensing unit whether zero or lower than predetermined threshold value; If the DC component of voltage waveform of the electronic signal that light sensing unit exports is zero or lower than predetermined threshold value, this represents light sensing unit and does not detect ambient light or only detect very weak ambient light, therefore light sensing unit is confirmed as and user contact skin; If the direct current component of the voltage waveform of the electronic signal of light sensing unit output exceeds predetermined threshold value, this representative detects intense ambient light, therefore light sensing unit is confirmed as not and user contact skin.
Identify that the step of pulse comprises detecting and exports from light sensing unit and amplified by voltage amplifier and the rising edge of the voltage waveform of electronic signal that filters, peak value and drop edge.
Step (v) is further comprising the steps of:
What i continuous pulse that () is preset number was right obtains pulse rate every a pair, the pulse rate wherein obtaining often pair of continuous pulse is time period in seconds between peak value by measuring the first right pulse of continuous pulse and the peak value of the second pulse that pulse is right continuously, and by time period of measuring divided by 60;
(ii) by calculating the meansigma methods of the right pulse rate of the continuous pulse of preset number, the output pulse rate outputting to output device is obtained;
(iii) as needs, (i) and (ii) preset times is repeated, to upgrade the output pulse rate outputting to output device.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of the first embodiment of the present invention.
Fig. 2 is the figure that the light source of the first embodiment, light sensing unit, light trap structure are shown.
Fig. 3 is the block diagram of the first embodiment.
Fig. 4 is the circuit diagram of the voltage amplifier of the first embodiment.
Fig. 5 is the curve chart of the voltage waveform that the electronic signal exported by the light sensing unit of the first embodiment is shown.
Fig. 6 a to 6c is the axonometric chart of the housing of other embodiments.
Detailed description of the invention
Hereafter describe the present invention in detail with reference to several embodiment and accompanying drawing.But the present invention should not limit by detailed description hereafter.
As shown in Fig. 1 to 5, the pulse rate measuring device of the first embodiment of the present invention comprises microprocessor 1, light source 2, light sensing unit 3, output device 4 and holds the housing 5 of microprocessor 1, light source 2, light sensing unit 3 and output device 4.
The housing 5 of the present embodiment is spectacle-frame.Spectacle-frame is provided with two earpieces, is wherein often only equipped with elasticity outthrust 51; Light source 2 and light sensing unit 3 are arranged on towards on one of them elasticity outthrust 51 of user skin; Elasticity outthrust 51 is used as clip, to guarantee the temporo skin region close contact of light source 2 and light sensing unit 3 and user.Output device 4 is electrically connected with microprocessor 1, and comprises wireless communication module 41, audio frequency output unit 42 and miniature projecting unit 43 further.Wireless communication module 41 transmits the output pulse rate that calculated by microprocessor 1 to external device (ED) 9; External device (ED) 9 can be PC or flow device, and the output pulse rate transmitted from wireless communication module 41 is analyzed, shows and stored to its operation flowing software application formula.Audio output unit 42 exports pulse rate with audible.Miniature projecting unit 43 exports pulse rate with image mode; Image is formed on the viewing area of spectacle-frame by miniature projecting unit throw light.
Light source 2 for emission of light to the vein under user skin and capillary vessel.At the present embodiment, light source 2 is connected to microprocessor 1 by rheostat 6.The light source 2 of the present embodiment comprises two and to be situated between the 400 how LED that how operate between rice of rice to 900 at wavelength.Light source 2 and light sensing unit 3 are separated from each other setting, preferably separate 2 millimeters, wherein light trap 8 is arranged between light source 2 and light sensing unit 3, light sensing unit 3 is directly entered to prevent the light of light source 2, guarantee that light that light sensing unit 3 senses is the reflection from skin, thus improve the accuracy that pulse rate measures.Light trap 8 is that epoxy resin is made, and it is dark, soft, elastic electrical insulator.Dark color prevents the light of light source 2 from directly entering light sensing unit 3, guarantees that light that light sensing unit 3 senses is the reflection from skin, thus improves the accuracy that pulse rate measures.Soft, elastic material guarantees that light source 2 and light sensing unit 3 are suitably separated mutually, and suitably shields light source 2 and light sensing unit 3, from dust and influence of moisture.Electrical insulation characteristics protection light source 2 and light sensing unit 3, from Effect of Short Circuit.
The light sensing unit 3 of the present embodiment can be photodiode or phototransistor, for detecting the light being transmitted into vein and capillary vessel and the light reflected from vein and capillary vessel.At the present embodiment, as shown in Figure 5, the electronic signal of light sensing unit 3 output voltage waveforms, it has the direct current component representing ambient light intensity, and representative is from the AC portion of intensity of the light of vein and capillary vessel reflection; Light sensing unit 3 is connected to microprocessor 1 by voltage amplifier 7; Voltage amplifier 7 amplifies and filters the voltage waveform of the electronic signal exported from light sensing unit 3, for being identified by microprocessor 1.At the present embodiment, voltage amplifier 7 is operational amplifiers, and it comprises secondary operational amplifier 72, first capacitor 73, first resistor 74 of input 71, first, low pass filter 75, active low-pass filter 76 and outfan 77.Input 71 collects the voltage waveform of the electronic signal exported from light sensing unit 3, and is connected to the first secondary operational amplifier 72.First secondary operational amplifier 72 is used as voltage follower, and it eliminates the unnecessary effect produced because of the impedance variation of light sensing unit 3.First capacitor 73 for the direct current component of the voltage waveform of block electrons signal, that is is for measuring the unnecessary signal of pulse rate.First capacitor 73 is by the first resistor 74 ground connection.First resistor 74, for discharging to the first capacitor 73, makes the first capacitor 73 charged in course of normal operation can not produce additional dc electricity to active low-pass filter 76, and can not produce error signal at outfan 77.Low pass filter 75 is made up of the second resistor 751 and the second capacitor 752, is used for suppressing the unnecessary high-frequency noise from light sensing unit 3 generation.Active low-pass filter 76 is made up of the second secondary operational amplifier 761, feedback resistor 762 and feedback condenser 763; Active low-pass filter 76 for amplifying voltage waveform for microprocessor 1, and suppresses unnecessary high-frequency noise further.Outfan 77 transmits voltage waveform to microprocessor 1 from active low-pass filter 76.
Microprocessor 1 be arranged to determine light sensing unit 3 whether with user contact skin, if and light sensing unit 3 is determined and user contact skin, microprocessor 1 will be arranged to the light intensity of adjustment light source 2, until microprocessor 1 successfully identifies the continuous pulse of preset number, and then carry out pulse rate calculating, to obtain the output pulse rate outputting to output device 4.At the present embodiment, the preset number of continuous pulse is two.
More specifically, the direct current component that microprocessor 1 is configured to the voltage waveform by determining the electronic signal exported from light sensing unit 3 whether zero or lower than predetermined threshold value, determine light sensing unit 3 whether with user contact skin; If the DC component of voltage waveform of the electronic signal that light sensing unit 3 exports is zero or lower than predetermined threshold value, this represents light sensing unit 3 and does not sense ambient light or only detect very weak ambient light, therefore light sensing unit 3 is confirmed as and user contact skin; If the voltage waveform of the direct current component of the electronic signal of light sensing unit 3 output exceeds predetermined threshold value, this representative detects strong ambient light, therefore light sensing unit 3 is confirmed as not and user contact skin.If light sensing unit 3 is determined and user contact skin, microprocessor 1 can identify two continuous pulses further, wherein to be exported from light sensing unit 3 by detecting and to be amplified by voltage amplifier 7 and the rising edge of the voltage waveform of electronic signal that filters, peak value and drop edge identify pulse.If identification two continuous pulses failed by microprocessor 1, microprocessor 1 adjusts the light intensity of light source 2, until two continuous pulses are successfully identified by the resistance value adjusting rheostat 6.Then microprocessor 1 carries out pulse rate calculating by following steps: what the continuous pulse that (i) is preset number (the present embodiment be two to) was right obtains pulse rate every a pair, the pulse rate wherein obtaining often pair of continuous pulse is time period in seconds between peak value by measuring the first right pulse of continuous pulse and the peak value of the second pulse that pulse is right continuously, and by time period of measuring divided by 60; (ii) by calculating the meansigma methods of the right pulse rate of the continuous pulse of preset number, the output pulse rate for outputting to output device is obtained; (iii) as needs, (i) and (ii) preset times (the present embodiment is ten times) is repeated, to upgrade the output pulse rate outputting to output device.
At the present embodiment, housing 5 also arranges moving sensing unit 10, for measuring the movement of user; The output of moving sensing unit 10 is sent to output device 4.
Fig. 6 a to 6c illustrates other embodiments of the present invention, and its middle shell 5 is the accessory of the position such as shank, wrist, upper arm that can be worn on a people respectively.
Above-described embodiment is the present invention's more preferably embodiment, but above-described embodiment is not used in restriction description of the invention.Any do not depart from essence done by spirit of the present invention or substantially to change, modify, substitute, combination and simplifying, all should be substituting of equivalence, and be included within protection scope of the present invention.
Claims (24)
1. pulse rate measuring device, comprising:
Microprocessor;
For the light source of emission of light to the vein under user skin and capillary vessel, it is electrically connected with microprocessor;
For detecting the light sensing unit of the light that is transmitted into vein and capillary vessel and the light from vein and capillary vessel reflection, it is electrically connected with microprocessor;
The output device be electrically connected with microprocessor;
Hold the housing of microprocessor, light source, light sensing unit and output device;
Wherein microprocessor be arranged to determine light sensing unit whether with user contact skin, if and light sensing unit is determined and user contact skin, microprocessor is arranged to the light intensity of adjustment light source, until microprocessor successfully identifies the continuous pulse of preset number, and after carry out pulse rate calculating again, to obtain the output pulse rate outputting to output device.
2. pulse rate measuring device as claimed in claim 1, it is characterized in that, the electronic signal of light sensing unit output voltage waveforms, it has the direct current component representing ambient light intensity, and representative is from the AC portion of intensity of the light of vein and capillary vessel reflection.
3. pulse rate measuring device as claimed in claim 2, it is characterized in that, the direct current component that microprocessor is configured to the voltage waveform by determining the electronic signal exported from light sensing unit whether zero or lower than predetermined threshold value, determine light sensing unit whether with user contact skin; If the direct current component of voltage waveform of the electronic signal that light sensing unit exports is zero or lower than predetermined threshold value, this represent light sensing unit do not detect ambient light or the ambient light that detects very weak, therefore light sensing unit is confirmed as and user contact skin; If the voltage waveform of the direct current component of the electronic signal of light sensing unit output exceeds predetermined threshold value, this representative detects strong ambient light, therefore light sensing unit is confirmed as not and user contact skin.
4. pulse rate measuring device as claimed in claim 3, it is characterized in that, light source is connected to microprocessor by rheostat; Light sensing unit is connected to microprocessor by voltage amplifier; Voltage amplifier amplifies and filters the voltage waveform of electronic signal exported from light sensing unit, with by microprocessor identification.
5. pulse rate measuring device as claimed in claim 4, is characterized in that, microprocessor to be exported from light sensing unit by detecting and to be amplified by voltage amplifier and the rising edge of the voltage waveform of electronic signal that filters, peak value and drop edge identify pulse.
6. pulse rate measuring device as claimed in claim 5, is characterized in that, microprocessor, by the resistance value of adjustment rheostat, adjusts the light intensity of light source.
7. pulse rate measuring device as claimed in claim 6, it is characterized in that, microprocessor carries out pulse rate calculating by following steps, to obtain output pulse rate, and for outputting to output device:
What i continuous pulse that () is preset number was right obtains pulse rate every a pair, the pulse rate wherein obtaining often pair of continuous pulse is time period in seconds between peak value by measuring the first right pulse of continuous pulse and the peak value of the second pulse that pulse is right continuously, and by time period of measuring divided by 60;
(ii) by calculating the meansigma methods of the right pulse rate of the continuous pulse of preset number, the output pulse rate outputting to output device is obtained.
(iii) as needs, (i) and (ii) preset times is repeated, to upgrade the output pulse rate outputting to output device.
8. pulse rate measuring device as claimed in claim 7, it is characterized in that, voltage amplifier is operational amplifier, and it comprises input, the first secondary operational amplifier, the first capacitor, the first resistor, low pass filter, active low-pass filter and outfan; Input collects the voltage waveform of electronic signal output from light sensing unit, and is connected to the first secondary operational amplifier; First secondary operational amplifier is used as voltage follower, and it eliminates the unnecessary effect produced because of the impedance variation of light sensing unit; First capacitor is used for the direct current component of the voltage waveform of block electrons signal; Direct current component is for measuring the unnecessary signal of pulse rate; First capacitor is by the first resistance-grounded system; First resistor is used for the first capacitor discharge, thus makes the first capacitor charged in course of normal operation can not produce extra unidirectional current to active low-pass filter, and can not produce error signal at outfan; Low pass filter is made up of the second resistor and the second capacitor, is used for suppressing the unnecessary high-frequency noise from light sensing unit generation; Active low-pass filter is made up of the second secondary operational amplifier, feedback resistor and feedback condenser; Active low-pass filter is used for, for microprocessor amplifies voltage waveform, then suppressing unnecessary high-frequency noise; Outfan transmits voltage waveform to microprocessor from active low-pass filter.
9. pulse rate measuring device as claimed in claim 1, it is characterized in that, light source comprises one or more light source.
10. pulse rate measuring device as claimed in claim 1, is characterized in that, light source is at the 400 how wavelength operation of rice to 900 how between rice that are situated between.
11. pulse rate measuring devices as claimed in claim 1, it is characterized in that, light source and light sensing unit are separated from each other setting, preferably separate 2 millimeters, wherein light trap is arranged between light source and light sensing unit, directly enters light sensing unit to prevent the light of light source.
12. pulse rate measuring devices as claimed in claim 11, is characterized in that, light trap is dark, soft, elastic electrical insulator.
13. pulse rate measuring devices as claimed in claim 1, is characterized in that, output device comprises and transmits the pulse rate that calculated by the microprocessor wireless communication module to external device (ED).
14. pulse rate measuring devices as claimed in claim 13, it is characterized in that, external device (ED) is PC or flow device, and the pulse rate from radio communication mold block movement is analyzed, shows and stored to its operation flowing software application formula.
15. pulse rate measuring devices as claimed in claim 1, is characterized in that, output device comprises the audio output unit exporting pulse rate with audible.
16. pulse rate measuring devices as claimed in claim 1, it is characterized in that, housing is spectacle-frame; Output device comprises miniature projecting unit, and it exports pulse rate with image mode; Image is formed on the viewing area of spectacle-frame by miniature projecting unit throw light; Spectacle-frame is provided with two earpieces, is wherein often only equipped with elasticity outthrust; Light source and light sensing unit are arranged on towards on one of them elasticity outthrust of user skin; Elasticity outthrust is used as clip, to guarantee the temporo skin region close contact of light source and light sensing unit and user.
17. pulse rate measuring devices as claimed in claim 1, it is characterized in that, housing is to be worn on the accessory on health different parts.
18. pulse rate measuring devices as claimed in claim 17, it is characterized in that, housing is connected to adjustable band; Adjustable band is worn on health different parts.
19. pulse rate measuring devices as claimed in claim 1, it is characterized in that, housing also arranges moving sensing unit, for measuring the movement of user; The output of moving sensing unit is sent to output device.
20. pulse rate measuring methods, comprise the following steps:
I () is from source emissioning light line to the vein user skin and capillary vessel;
(ii) light being transmitted into vein and capillary vessel and the light reflected from vein and capillary vessel is detected by light sensing unit;
(iii) determine light sensing unit whether with user contact skin;
(iv) if light sensing unit is determined and user contact skin, the light intensity of adjustment light source, until the continuous pulse of preset number is successfully identified;
V () carries out pulse rate calculating, to obtain output pulse rate.
21. pulse rate measuring methods as claimed in claim 20, it is characterized in that, step (ii) also comprises the electronic signal exported as voltage waveform, it has the direct current component representing ambient light intensity, and representative is by the AC portion of intensity of light sensing unit from the light of vein and capillary vessel reflection.
22. pulse rate measuring methods as claimed in claim 21, is characterized in that, the direct current component that step (iii) also comprises the voltage waveform determining the electronic signal exported from light sensing unit whether zero or lower than predetermined threshold value; If the DC component of voltage waveform of the electronic signal that light sensing unit exports is zero or lower than predetermined threshold value, this represents light sensing unit and does not detect ambient light or only detect very weak ambient light, therefore light sensing unit is confirmed as and user contact skin; If the direct current component of the voltage waveform of the electronic signal of light sensing unit output exceeds predetermined threshold value, this representative detects intense ambient light, therefore light sensing unit is confirmed as not and user contact skin.
23. pulse rate measuring methods as claimed in claim 21, is characterized in that, identify that the step of pulse comprises detecting and exports from light sensing unit and amplified by voltage amplifier and the rising edge of the voltage waveform of electronic signal that filters, peak value and drop edge.
24. pulse rate measuring methods as claimed in claim 21, it is characterized in that, step (v) is further comprising the steps of:
What i continuous pulse that () is preset number was right obtains pulse rate every a pair, the pulse rate wherein obtaining often pair of continuous pulse is time period in seconds between peak value by measuring the first right pulse of continuous pulse and the peak value of the second pulse that pulse is right continuously, and by time period of measuring divided by 60;
(ii) by calculating the meansigma methods of the right pulse rate of the continuous pulse of preset number, the output pulse rate outputting to output device is obtained;
(iii) as needs, (i) and (ii) preset times is repeated, to upgrade the output pulse rate outputting to output device.
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| GB1317730.8 | 2013-10-08 | ||
| GB1317730.8A GB2519075B (en) | 2013-10-08 | 2013-10-08 | Apparatus and method for measuring pulse rate |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB2519075A (en) | 2015-04-15 |
| CN104510459B (en) | 2017-04-12 |
| GB201317730D0 (en) | 2013-11-20 |
| GB2519075A8 (en) | 2015-04-29 |
| GB2519075B (en) | 2017-12-13 |
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