CN205234510U - Measure human oxyhemoglobin saturation's portable instrument - Google Patents

Abstract

The utility model discloses a measure human oxyhemoglobin saturation's portable instrument, include: data collection station, data communication ware, FFT data processor, data calculation ware and display to connect gradually, data collection station includes: infrared light emission structure and ruddiness emission structure are connected with first time -recorder and second time -recorder respectively on it, the sensor is connected with the third time -recorder, FIR filtering structure is connected with the sensor, valid data filters the structure, is connected with FIR filtering structure and data communication ware respectively, the data communication ware is connected with valid data screening structure and FFT data processor respectively, and the data calculation ware is connected with the FFT treater, the display is connected with the data calculation ware. The utility model provides an equipment can be measured and reach more accurate oxyhemoglobin saturation.

Description

A kind of portable set of measuring human body blood oxygen saturation

Technical field

The utility model belongs to mobile health intelligent detection technique field, is specifically related to a kind of human body blood oxygen saturation of measuringPortable set.

Background technology

Pulse blood oxygen is considered to one of health indicator of human body most critical. Blood oxygen saturation is reflection human body respirationThe whether normal important physiological parameter of function and oxygen content, it is to show that whether healthy our human body respectively organize an important lifeReason parameter. The generation of the tragedies such as severe depletion of oxygen meeting directly causes suffocating, suffers a shock, dead. In developed countries such as America and Europes, people are to bloodThe monitoring of oxygen is quite paid attention to.

Blood oxygen saturation represents with percentage, and it is the ratio of oxygen content with the hemoglobin oxygen carrying capacity of hemoglobin,The concentration of blood oxygen in blood is the important physiological parameter of respiratory circulatory system. Normal person's numerical value 95% ?between 99%, lowBe regarded as for hypoxgia in 95%. That hypoxemia can cause is absent minded, failure of memory, have a dizzy spell, anxiety etc.Symptom; Cardiac muscle is very responsive to anoxic, and acute myocardial anoxia can occur ventricular fibrillation so that cardiac arrest; Seriously or for a long time lackOxygen, causes myocardial failure, blood pressure drops, blood circulation exhaustion; What is more, and anoxic is directly damaged cerebral cortex, causes brain tissueSex change and necrosis.

What traditional Medical blood-oxygen was measured use is blood gas analyzer, need to gather blood of human body, and need to specifyMedical institutions' test, measurement data is accurate, but time-consuming, effort, expensive.

And family expenses pulse blood oxygen instrument in the market provides to measure blood oxygen saturation without wound mode or artery is blood redThe method of albumen saturation degree. Pulse blood oxygen instrument can also detect arterial pulse, therefore also can calculate and inform patient's heart rate.It adopts optical principle can obtain oximetry data without blood sampling, and volume is small and exquisite, but its maximum defect is the degree of accuracyNot high.

Utility model content

The purpose of this utility model is, a kind of portable set of measuring human body blood oxygen saturation is provided, can be timelyBy wearer's oximetry data collection, be uploaded to cloud server by wireless network, and by FIR filter structure andFFT processes structure, realizes accurate collection and calculating to human body blood oxygen saturation.

For achieving the above object, the utility model provides a kind of portable set of measuring human body blood oxygen saturation, bagDraw together: data acquisition unit, data-phone, FFT data processor, data calculator and display, and connect successively;

Described data acquisition unit comprises:

Infrared light emission structure and red emission structure, be connected with respectively the first timer and the second timer on it;

Sensor, is connected with the 3rd timer, carries out timing sampling for the light intensity of the transmitted light to described finger, producesSampled data;

FIR filter structure, is connected with described sensor;

Valid data screening structure, is connected with described FIR filter structure and data-phone respectively;

Described data-phone is connected with described valid data screening structure and described FFT data processor respectively, by instituteState valid data and be transferred to described FFT data processor;

Described data calculator, is connected with described fft processor, calculates blood oxygen saturation;

Described display, is connected with described data calculator.

In wherein said infrared light emission structure and red emission structure, be provided with respectively luminous intensity adjustable plate.

Preferably, also comprise luminous intensity adjustment structure, its respectively with described infrared light emission structure and described red emissionStructure connects.

Preferably, also comprise enter key, be connected with described luminous intensity adjustment structure.

Wherein, on described valid data screening structure and described FFT data processor, be provided with connecting interface.

Wherein, described data-phone is HDMI data telecommunication line, respectively with described valid data screening structure with described inDescribed interface on FFT data processor connects.

Preferably, also comprise that filtering exponent number arranges structure, be connected with described FIR filter structure.

Wherein, in described data calculator, be provided with WIFI transmission structure, described blood oxygen saturation is transferred to high in the clouds clothesBusiness device.

Compared with prior art, the beneficial effects of the utility model are: the measurement human body blood oxygen in the utility model is fullPortable set with degree, can obtain AC signal by FIR filter structure, then will exchange by FFT data processing knot is enoughSignal is processed, and can draw very accurately the information such as DC component, makes the calculated value of final blood oxygen saturation more accurateReally.

In addition, luminous intensity adjustable plate is set in sensor, can effectively avoids the otherness of different human body to make transmitted lightThe error that the difference of intensity causes, it is more accurate to ensure to calculate.

Brief description of the drawings

Fig. 1 is the structure chart of measuring the portable set of human body blood oxygen saturation in the utility model;

Fig. 2 is original infrared signal and the red signal light figure that in the utility model, sensor collects;

Fig. 3 is infrared signal and the red signal light figure filtering through FIR filter structure in the utility model;

Fig. 4 is valid data signal graph after FFT processes in the utility model.

Description of reference numerals:

1-data acquisition unit 2-data communication equipment 3-FFT data processor

4-data calculator 5-display 11-infrared light emission structure

12-red emission structure 13-sensor 14-FIR filter structure

15-valid data screening structure 101-first timer 102-the second timer

103-the 3rd timer

Detailed description of the invention

For ease of those skilled in the art, the technical solution of the utility model and beneficial effect are understood, special in conjunction with attachedFigure describes as follows to detailed description of the invention.

As shown in Figure 1, it is for measuring the structure chart of the portable set of human body blood oxygen saturation in the utility model, from figureIn known, the portable set of this measurement human body blood oxygen saturation comprises: data acquisition unit 1, data-phone 2, FFT data placeReason device 3, data calculator 4 and display 5, and connect successively;

Data acquisition unit 1 comprises:

Infrared light emission structure 11 and red emission structure 12, be connected with respectively the first timer 101 and second on itTime device 102, by both timing, control infrared light emission structure 11 and shine with opponent's fingering row that red emission structure 12 replacesPenetrate, produce the transmitted light to finger. Also comprise luminous intensity adjustment structure, respectively with infrared light emission structure 11 and red emission knotStructure 12 connects, and can regulate the emitted luminescence intensity of infrared light and ruddiness, ties by luminous intensity adjustment structure control infrared light emissionStructure 11 or red emission structure 12 are launched the light of respective strengths. In the present embodiment, the infrared light wavelength of transmitting is905nm, red light wavelength is 660nm.

Sensor 13, is connected with the 3rd timer 103, carries out timing sampling for the light intensity of the transmitted light to finger, producesRaw sampled data.

Because different human bodies has different, identical light intensity is seeing through after different tissues, output intensityNot identical. In the time that older uses this equipment, because its finger is thicker, tissue fluid is more sticky, and projection light intensityA little less than, need to increase transmission light intensity, make the projection light strength signal that sensor 13 gathers meet certain condition, ensure to calculate knotThe accuracy of fruit. Therefore, in infrared light emission structure 11 and red emission structure 12, be provided with respectively luminous intensity adjustable plate, useSo that the projection light of the finger of different human body is adjusted to the projection light that intensity is suitable, meet the human test's of different physique needAsk. This luminous intensity adjustable plate adopts following formula to carry out the dynamic adjustment of sample frequency:

$u\left(t\right)=K_{P}e\left(t\right)+K_I{\∫}_0^{t}e\left(\mathrm{\τ}\right)d\mathrm{\τ}+K_D\frac{de\left(t\right)}{dt}$

Wherein, u (t) is intensity control amount, K_pFor rate mu-factor, K_IFor integral coefficient, K_DFor differential coefficient, e (t),E (τ) collects light intensity for sensor; τ: to the integrating factor of time t, the interval of τ be (0, t).

FIR filter structure 14, is connected with sensor 13, and the sampled data that sensor 13 is collected carry out high-pass filtering placeReason, obtains AC compounent. The exponent number of FIR filter structure 14 is higher, and filter effect is better. But in use, exponent number moreHeight, time response is slower, and cpu resource takies more. Therefore, measurement human body blood oxygen saturation of the present utility model is portableEquipment is also provided with filtering exponent number structure is set, and is connected with FIR filter structure 14. In the utility model, consider signal responseReal-time, adopt 248 rank filtering. FIR filter structure 14 carries out filtering according to following formula:

$y\left(n\right)=\underset{m=0}{\overset{N-1}{\Σ}}h\left(m\right)X(n-m)$

Wherein, y (n): FIR filtering result sequence; H (m): FIR filtering list entries, the signal order that sensor collectsRow; N=248, filtering exponent number; M=0-247, filtering variable

After FIR filtering, can draw some essential informations of AC signal. Refer to Fig. 2, it is the utility modelOriginal infrared signal and red signal light that middle sensor collects, as can be seen from the figure, original infrared signal and redThe interference that optical signal comprises high frequency and invalid components. As shown in Figure 3, it is to filter through FIR filter structure in the utility modelInfrared signal and red signal light. After FIR filtering, the interference of high frequency and invalid components disallowable fall, exchangedComponent signal, for final data analysis.

Valid data screening structure 15, is connected with FIR filter structure 14 and data-phone 2 respectively, and AC compounent is enteredLine frequency screening, and reject invalid data, moving or point the invalid data producing while rationally placement as pointed, finger movesOr not rationally placement of finger, the data that get when the data that sensor 13 gets and normal placement are significantly different, significant figureUtilize software algorithm to be rejected according to screening structure 15.

Data-phone 2 in the utility model adopts HDMI order wire, and its one end is connected to valid data screening structureInterface on 15, the other end is connected to the interface on FFT data processor 3, and valid data are transferred to FFT data processor 3,Described valid data are carried out to FFT (Fast Fourier Transform (FFT)) and process, as shown in Figure 4, it is valid data in the utility modelSignal graph after FFT processes, obtains DC component.

Data-phone 2 adopt the object of HDMI order wire be can be convenient transmission several data because itsHave 4-6 data lines, if adopt usb data line, its inside only has two data lines, has negative to the transmission of mass dataLoad, reduces efficiency of transmission.

Data calculator 4, is connected with FFT data processor, and according to 20 nearest data results, COMPREHENSIVE CALCULATING blood oxygen is fullWith degree and heart rate. On data calculator 4, be also provided with WIFI transmission structure, final blood oxygen saturation can be uploaded to high in the cloudsServer, is convenient to management and monitoring.

Display 5 is connected with data calculator 4, shows final oximetry value.

In the portable set of the measurement human body blood oxygen saturation in the utility model on each structure and functional partAll be provided with interface, being connected to each other between them by Interface realization.

The portable set of the measurement human body blood oxygen saturation in the utility model, can obtain by FIR filter structure 14To AC signal, then by FFT data processor 3, AC signal is processed, can be drawn very accurately DC component letterBreath, makes the calculated value of final blood oxygen saturation more accurate.

The foregoing is only preferred embodiment of the present utility model, is only illustrative for utility model, but notRestrictive. Those skilled in the art is understood, and in the spirit and scope that require to limit, can carry out it in utility model rightMany changes, amendment, even equivalence, but all will fall in protection domain of the present utility model.

Claims (8)

1. a portable set of measuring human body blood oxygen saturation, is characterized in that, comprising: data acquisition unit (1), data are led toLetter device (2), FFT data processor (3), data calculator (4) and display (5), and connect successively;

Described data acquisition unit (1) comprising:

Infrared light emission structure (11) and red emission structure (12), be connected with respectively the first timer (101) and second on itTimer (102);

Sensor (13), is connected with the 3rd timer (103), carries out timing sampling for the light intensity of the transmitted light to finger, producesRaw sampled data;

FIR filter structure (14), is connected with described sensor (13);

Valid data screening structures (15), are connected with described FIR filter structure (14) and data-phone (2) respectively;

Described data-phone (2) connects with described valid data screening structures (15) and described FFT data processor (3) respectivelyConnect, described valid data are transferred to described FFT data processor (3);

Described data calculator (4), is connected with described fft processor (3), calculates blood oxygen saturation;

Described display (5), is connected with described data calculator (4).

2. the portable set of measurement human body blood oxygen saturation according to claim 1, is characterized in that, described infrared lightIn emitting structural (11) and red emission structure (12), be provided with respectively luminous intensity adjustable plate.

3. the portable set of measurement human body blood oxygen saturation according to claim 1, is characterized in that, also comprises light intensityDegree adjustment structure, it is connected with described infrared light emission structure (11) and described red emission structure (12) respectively.

4. the portable set of measurement human body blood oxygen saturation according to claim 3, is characterized in that, also comprises inputKey, is connected with described luminous intensity adjustment structure.

5. the portable set of measurement human body blood oxygen saturation according to claim 1, is characterized in that, described significant figureAccording to being provided with connecting interface on screening structure (15) and described FFT data processor (3).

6. the portable set of measurement human body blood oxygen saturation according to claim 5, is characterized in that, described data are logicalLetter device (2) is HDMI data telecommunication line, respectively with described valid data screening structures (15) and described FFT data processor (3)On described interface connect.

7. the portable set of measurement human body blood oxygen saturation according to claim 1, is characterized in that, also comprises filterRipple exponent number arranges structure, is connected with described FIR filter structure (14).

8. the portable set of measurement human body blood oxygen saturation according to claim 1, is characterized in that, described data meterCalculate in device (4) and be provided with WIFI transmission structure, described blood oxygen saturation is transferred to cloud server.