CN203153748U - Oximeter based on audio interface communication - Google Patents

Oximeter based on audio interface communication Download PDF

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Publication number
CN203153748U
CN203153748U CN 201320110855 CN201320110855U CN203153748U CN 203153748 U CN203153748 U CN 203153748U CN 201320110855 CN201320110855 CN 201320110855 CN 201320110855 U CN201320110855 U CN 201320110855U CN 203153748 U CN203153748 U CN 203153748U
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sensor
module
connects
outfan
input
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Inventor
林祝发
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Qianhai Shenzhen universal health technology Co., Ltd.
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林祝发
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Priority to CN 201320110855 priority Critical patent/CN203153748U/en
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Publication of CN203153748U publication Critical patent/CN203153748U/en
Priority to PCT/CN2014/072299 priority patent/WO2014139354A1/en
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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
    • A61B5/74—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
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
    • A61B2562/225—Connectors or couplings
    • A61B2562/227—Sensors with electrical connectors

Abstract

The utility model discloses an oximeter based on audio interface communication, which comprises a power supply module, a sensor control module, a sensor, a sensor signal processing module and physical hardware of a standard audio interface, wherein a left sound channel signal transmission line, a right sound channel signal transmission line and a microphone signal transmission line of the audio interface perform power supply transmission, control signal input and collection signal output respectively; a control signal input end of the sensor control module is connected with a control signal input circuit of the audio interface; an input end of the power supply module is connected with a power supply transmission line of the audio interface; an output end of the sensor signal processing module is connected with a collection signal output line of the audio interface; a control signal output end of the sensor control module is connected with a control signal input end of the sensor; and a signal output end of the sensor is connected with an input end of the sensor signal processing module.

Description

Blood oxygen instrument based on audio port communication
Technical field
The invention belongs to individual medical application fields, specifically be based on audio port based on the blood oxygen instrument of audio port communication.
Background technology
At present, development and the growth in the living standard of society, people more and more pay close attention to the health of self, many individual medical products based on vital sign collecting device class occurred thereupon, as portable blood oxygen instrument, blood glucose meter, fetus-voice meter and electrocardiogram equipment etc.Present individual medical product mainly is made up of data acquisition module, computing module, display module and power module etc., and exist deficiency mainly to comprise: at first, cost is higher.Secondly, volume is bigger; Moreover, lack data and store and analytic function; Also have, lack the remote data transmission function.Simultaneously, at present be that the mobile device of representative is universal day by day with the smart mobile phone, and mobile device possesses very strong calculating and display capabilities, and possess power supply data storage analysis and remote transmission function are provided.
Summary of the invention
In order to solve the above-mentioned deficiency of existing individual medical product, this utility model provides the method for individual medical product based on audio port, proposes a kind of blood oxygen instrument based on audio port communication, thereby reduces product cost, reduce small product size, and the function of data storage analysis and remote transmission is provided.
To achieve these goals, this utility model based on design the method for individual medical product based on audio port, its design philosophy is, utilize the harvester (can be converted by the harvester of existing vital sign) of general portable terminal (for example smart mobile phone, PDA and portable computer etc.) and vital sign, powered to harvester by portable terminal, and drive harvester and carry out the vital sign parameter signals collection, receive the signal of vital sign then and calculate, demonstration, data storage, analysis and remote transmission handle;
Install the physical hardware of standard audio interface additional at harvester, the data signal lead-out terminal of harvester, control signal input terminal and power input terminal are connected to respectively on the binding post of standard audio mouth;
Harvester and portable terminal carry out physical connection by the standard audio mouth, bear power delivery and signal transmission respectively by left channel signals transmission line, right-channel signals transmission line and the microphone signal transmission line of audio port.
Based on above-mentioned design philosophy, the concrete technical scheme of this method is as follows:
Described portable terminal is loaded with audio port hardware and application software, and this application software comprises electric power driving module, sensing driver module, sampling filter module, computing module, data memory module, data analysis module, display module and remote communication module;
Step 1 is the power supply power supply:
Export the sine wave of a certain frequency by the electric power driving module of a portable terminal left side or the R channel by the sound card of portable terminal to harvester, this sine wave has the audio file of corresponding sine wave freuqency; Stable power output after handling sine wave, the power module in the harvester is provided;
Step 2 is the collecting work control of harvester:
Sensing driver module by portable terminal produces square wave, and this square wave has the audio file of corresponding square wave; Square wave is by exporting the control signal input that different sound channel is transferred to harvester with electric power driving module;
Step 3 is the collection of vital sign data signal:
Utilize the rising edge of square wave and trailing edge to control collecting work by the control module of harvester;
Step 4 is the vital sign data Signal Processing:
Send into the input of the microphone signal of portable terminal by the microphone signal transmission line through the vital sign data signal of harvester collection;
Step 5 is the filtering of vital sign data signals sampling:
Sampling filter module by portable terminal is carried out sampling processing to the data signal from the microphone signal transmission line, obtains desired signal;
Step 6 is numerical computations:
Computing module by portable terminal calculates data signal, obtains reflecting the numerical value of vital sign;
Step 7 is that data store:
Data memory module by portable terminal is stored the data that numerical computations obtains;
Step 8 is data analysis:
Data analysis module by portable terminal at first carries out data statistics to the historical data in the data memory module, statistical data is analyzed again, and delivers to analysis result in the memory space of portable terminal by memory module then;
Step 9 is data show:
Take out data by the data disaply moudle of portable terminal to the memory space of portable terminal, the real time data of current collection is shown on the screen of portable terminal, and the result of data analysis is shown on the screen in the mode of form or figure;
Step 10 is remote data transmission:
Be to utilize the gprs module of portable terminal, 3G module or wifi module to be connected into the Internet by the mobile terminal remote communication module, with image data in real time or bulk transfer to the server of far-end.
As further improvement, in the described step 1, the processing procedure of the power module in the harvester is: at first sine wave boosts by booster transformer, carry out the FET rectification then, carry out realizing firm power output after the voltage stabilizing finally by crossing blocking diode and filter capacitor, be the harvester power supply;
Wherein the dead band pressure drop of rectification circuit in the system of low pressure is the key issue of power module, if use low pressure diode in rectification is handled, finds that in actual measurement the loss of most power has only small part to be sent to load in the rectification.If replace diode with FET, synchronous rectification can be used in the minimizing loss usually.
In the described step 5, by the sampling filter module of portable terminal the data signal from the microphone signal transmission line is carried out sampling processing, step is as follows:
At first the analogue signal from the vital sign data of microphone channel input is sampled with certain sample rate; Extract the DC component of sampled result then, adopt an iir filter to follow the tracks of DC component; Then from the analogue signal of the vital sign data of input, deduct DC component and obtain AC compounent; Adopting a corner frequency is that 6Hz and 50Hz reach with upper frequency, and the low-pass FIR filter of usefulness-50dB decay removes the above environmental noise of 50Hz in the AC compounent; At this moment the AC compounent signal just is used for the signal of subsequent treatment.
In the described step 7, by the data memory module of portable terminal storage data data compression algorithm be: if the measured value in a period of time is identical, will be stored with a record of attributes such as time started, concluding time, measurement number of times and measured value.
Specific to this utility model:
A kind of blood oxygen instrument based on audio port communication is characterized in that comprising the physical hardware of power module, sensor control module, sensor, sensor signal processing module and standard audio interface; Bear power delivery, control signal input and acquired signal output respectively by left channel signals transmission line, right-channel signals transmission line and the microphone signal transmission line of audio interface;
The control signal input of sensor control module connects the control signal incoming line of audio interface;
The input of power module connects the power supply transmission line of audio interface;
The outfan of sensor signal processing module connects the acquired signal outlet line of audio interface;
The control signal outfan of described sensor control module connects the control signal input of sensor;
The signal output part of described sensor connects the input of sensor signal processing module.
Described power module comprises booster transformer, FET rectification circuit, blocking diode and filter capacitor; The primary side of described booster transformer is the input of power module; The primary side of booster transformer connects the input of FET rectification circuit; The outfan of FET rectification circuit connects the input of the ∏ shape circuit that is made of blocking diode and filter capacitor, and the outfan of ∏ shape circuit is the outfan of power module.
Described sensor control module and sensor signal processing module are microprocessor or analog circuit.
Described sensor comprises PIN diode, red-light LED and infrared light LED; Described PIN diode receives the light from red-light LED and infrared light LED; One end of PIN diode connects power supply, is the outfan of sensor;
One, the sensor control module is microprocessor with the sensor signal processing module: microprocessor control signal output is connected driving red-light LED and infrared light LED by drive circuit respectively; Simultaneously, this microprocessor is as the sensor signal processing module, and the outfan of sensor connects the signal input part of little processing;
Perhaps,
Two, the sensor control module is analog circuit, and it comprises:
A) 1 binary counter that is constituted by d type flip flop and phase inverter; The clock signal input terminal of d type flip flop connects the control signal incoming line of audio interface, and the outfan of d type flip flop connects two inputs of phase inverter; The anode of red-light LED and infrared light LED is connected to input and the outfan of phase inverter; The D end of d type flip flop connects the outfan of phase inverter;
B) the voltage-controlled constant-current circuit that is constituted by operational amplifier and triode; The high level input of operational amplifier connects the control signal incoming line of audio interface; The outfan of operational amplifier connects the base stage of audion, and the colelctor electrode of audion connects the negative electrode of red-light LED and infrared light LED; The low level input of operational amplifier connects the emitter stage of audion;
The sensor signal processing module is analog circuit, its structure is the input that the other end of an end of PIN diode connects amplifying circuit, the outfan of this amplifying circuit connects the acquired signal outlet line of audio interface, and this amplifying circuit is as the sensor signal processing module.
Output end of microprocessor also comprises the blood oxygen levels outfan.Since the calculation function of little processing can satisfy the blood oxygen signal-computing of blood oxygen levels, so, can in blood oxygen instrument, finish computing.
Described power module also comprises farad capacitor, and this farad capacitor is in parallel with ∏ shape circuit.Adopting the reason of farad capacitor is to satisfy the power demand of harvester better, charge to farad capacitor in the components and parts working clearance that the such power of LED is bigger, in LED work, carry out power output together by farad capacitor and ∏ shape circuit, make whole harvester be in good power supply state.
Description of drawings
Fig. 1 provides the structure principle chart of blood oxygen vital sign measurement system for this utility model embodiment's based on audio interface;
Fig. 2 is the structured flowchart of the blood oxygen vital sign measurement system of this utility model embodiment;
Fig. 3 is the basic flow sheet of the blood oxygen vital sign measurement system of this utility model embodiment;
Fig. 4 is the circuit theory diagrams of power module of the blood oxygen vital sign measurement system of this utility model embodiment;
Fig. 5 is the LED control module circuit theory diagrams of the blood oxygen vital sign measurement system of this utility model embodiment;
Fig. 6 is the PIN signal processing module circuit theory diagrams of the blood oxygen vital sign measurement system of this utility model embodiment.
The specific embodiment
Design philosophy of the present utility model is a kind of method that designs individual medical product based on audio port, utilize general portable terminal and the harvester of vital sign, powered to harvester by portable terminal, and drive harvester and carry out the vital sign parameter signals collection, receive the signal of vital sign then and carry out subsequent treatment; Install the physical hardware of standard audio interface additional at harvester, the data signal lead-out terminal of harvester, control signal input terminal and power input terminal are connected to respectively on the binding post of standard audio mouth; The power of portable terminal output audio signal satisfies the operating power requirement of harvester, thereby the realization portable terminal is powered to harvester; Harvester and portable terminal carry out physical connection by the standard audio mouth, bear power delivery and signal transmission respectively by left channel signals transmission line, right-channel signals transmission line and the microphone signal transmission line of audio port.
Carry out calculating, demonstration, data storage, analysis and remote transmission processing that follow-up processing comprises the signal of midwifery life sign behind the signal of described portable terminal reception vital sign.
Described harvester comprises power module, sensor control module, sensor, sensor signal processing module; Described portable terminal is loaded with audio port hardware and application software, and this application software comprises electric power driving module, sensing driver module, sampling filter module, computing module, data memory module, data analysis module, display module and remote communication module;
Step 1 is the power supply power supply:
Export the ripple of a certain frequency by the electric power driving module of a portable terminal left side or the R channel by the sound card of portable terminal to harvester, this signal wave has the audio file of respective frequencies; Stable power output after handling signal wave, the power module in the harvester is provided;
Step 2 is the collecting work control of harvester:
Mode 1(analog signaling): the sensing driver module by portable terminal produces control signal, and this control signal is square wave, and this square wave has the audio file of corresponding square wave; Square wave is by exporting the control signal input that different sound channel is transferred to harvester with electric power driving module;
Perhaps, mode 2(is digital signaling): the sensing driver module of portable terminal adopts the serial communication mode to transmit control command, and its effect is equal to the control signal in the mode 1, in digital circuit, generally uses term " order "; (situation of complicated control refers to for example need to carry out the information communication situation)
Step 3 is the collection of vital sign data signal:
The mode 1 of corresponding step 2 utilizes the rising edge of square wave or trailing edge to control working sensor by the sensor control module of harvester;
The mode 2 of corresponding step 2 adopts the mode of serial communication to receive control command, controls the work of sensor by microprocessor;
Step 4 is the vital sign data Signal Processing:
After the vital sign parameter signals of sensor acquisition carries out signal processing through the sensor signal processing module of harvester, send into the input of the microphone signal of portable terminal by the microphone signal transmission line;
Step 5 is the filtering of vital sign data signals sampling:
To handling from the data signal of microphone signal transmission line, obtain desired signal by the sampling filter module of portable terminal;
Step 6 is numerical computations:
Computing module by portable terminal calculates data signal, obtains reflecting the numerical value of vital sign;
Step 7 is that data store:
Data memory module by portable terminal is stored the data that numerical computations obtains;
Step 8 is data analysis:
Data analysis module by portable terminal at first carries out data statistics to the historical data in the data memory module, statistical data is analyzed again, and delivers to analysis result in the memory space of portable terminal by memory module then;
Step 9 is data show:
Take out data by the data disaply moudle of portable terminal to the memory space of portable terminal, the real time data of current collection is shown on the screen of portable terminal, and the result of data analysis is shown on the screen in the mode of form or figure;
Step 10 is remote data transmission:
Be to utilize the gprs module of portable terminal, 3G module or wifi module to be connected into the Internet by the mobile terminal remote communication module, with image data in real time or bulk transfer to the server of far-end.
Signal wave in the described step 1 is sine wave or square wave.
In the described step 4, the dual mode in corresponding step 2 and the step 3, signal processing has dual mode:
A) corresponded manner 1: after carrying out analog signal processing, directly give portable terminal with analog signal transmission;
B) corresponded manner 2: be converted to digital signal by microprocessor, and give portable terminal with digital data transmission.
C) corresponded manner 2: be converted to digital signal by microprocessor, and after calculating result of calculation be transferred to portable terminal.At this moment, the filtering in the processor of portable terminal and the work of numerical computations just move in the harvester.
In the described step 1, the processing procedure of the power module in the harvester is: at first sine wave or square wave boost by booster transformer, carry out the FET rectification then, carry out realizing firm power output after the voltage stabilizing finally by crossing blocking diode and filter capacitor, be the harvester power supply.
In the described step 5, by the sampling filter module of portable terminal the data signal from the microphone signal transmission line is carried out sampling processing, step is as follows:
At first the signal from the vital sign data of microphone channel input is sampled with certain sample rate; Carry out signal processing then, signal processing herein adopts iir filter and/or FIR wave filter to carry out digital filtering;
DC component and AC compounent for extracting sampled result adopt an iir filter to follow the tracks of DC component; Then from the analogue signal of the vital sign data of input, deduct DC component and obtain AC compounent;
For signal is carried out bandpass filtering, can adopt the logical FIR wave filter of band;
At 2 situations of mode in the step 2, can adopt Fourier transformation or wavelet transformation complicated algorithm to handle.
In the described step 7, by the data memory module of portable terminal storage data data compression algorithm be: if the measured value in a period of time is identical, will be stored with a record of attributes such as time started, concluding time, measurement number of times and measured value.
A kind of blood oxygen instrument based on audio port communication comprises the physical hardware of power module, sensor control module, sensor, sensor signal processing module and standard audio interface;
Bear power delivery, control signal input and acquired signal output respectively by left channel signals transmission line, right-channel signals transmission line and the microphone signal transmission line of audio interface;
The control signal input of sensor control module connects the control signal incoming line of audio interface;
The input of power module connects the power supply transmission line of audio interface;
The outfan of sensor signal processing module connects the acquired signal outlet line of audio interface;
The control signal outfan of described sensor control module connects the control signal input of sensor;
The signal output part of described sensor connects the input of sensor signal processing module.
Described power module comprises booster transformer, FET rectification circuit, blocking diode and filter capacitor; The primary side of described booster transformer is the input of power module; The primary side of booster transformer connects the input of FET rectification circuit; The outfan of FET rectification circuit connects the input of the ∏ shape circuit that is made of blocking diode and filter capacitor, and the outfan of ∏ shape circuit is the outfan of power module.
Described sensor control module is microprocessor or analog circuit.
Described sensor comprises PIN diode, red-light LED and infrared light LED; Described PIN diode receives the light from red-light LED and infrared light LED; One end of PIN diode connects power supply, is the outfan of sensor;
One, the sensor control module is microprocessor, and microprocessor control signal output connects driving red-light LED and infrared light LED by drive circuit respectively; Simultaneously, this microprocessor is as the sensor signal processing module, and the outfan of sensor connects the signal input part of little processing;
Perhaps,
Two, the sensor control module is analog circuit, and this analog circuit comprises:
A) 1 binary counter that is constituted by d type flip flop and phase inverter; The clock signal input terminal of d type flip flop connects the control signal incoming line of audio interface, and the outfan of d type flip flop connects two inputs of phase inverter; The anode of red-light LED and infrared light LED is connected to input and the outfan of phase inverter; The D end of d type flip flop connects the outfan of phase inverter;
B) the voltage-controlled constant-current circuit that is constituted by operational amplifier and triode; The high level input of operational amplifier connects the control signal incoming line of audio interface; The outfan of operational amplifier connects the base stage of audion, and the colelctor electrode of audion connects the negative electrode of red-light LED and infrared light LED; The low level input of operational amplifier connects the emitter stage of audion;
The other end of one end of PIN diode connects the input of amplifying circuit, and the outfan of this amplifying circuit connects the acquired signal outlet line of audio interface, and this amplifying circuit is as the sensor signal processing module.
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is described in more detail.
This method is based on vital sign harvester (hereinafter to be referred as harvester).Harvester inserts mobile device by audio interface, by audio interface power supply and transmission data, be encoded to audio signal during the transmission data, the user enables the individual medical applications software on the mobile device, individual's medical applications software can carry out communication by audio interface and harvester shakes hands, and is finding that device inserts the back and allows the user to carry out life sign measurement.When the user carries out life sign measurement, application software carries out signals collecting and receives acquired signal by audio port control harvester, through over-sampling, filtering, obtain vital sign numerical value after the processing such as numerical computations, vital sign numerical value can be shown on the mobile terminal screen in real time and can store the persistent storage space of portable terminal into, thereby sets up individual medical data base and carry out data analysis according to various application demands.Can utilize simultaneously the remote communication module of portable terminal that transfer of data is arrived other place, to satisfy demands such as remote real-time monitoring, remote diagnosis, remote health analysis.
Be that example further specifies with blood oxygen life sign measurement below.
A kind of structure principle chart that blood oxygen vital sign measurement system is provided based on audio interface that Fig. 1 proposes for present embodiment.As shown in Figure 1, this system comprises blood oxygen vital sign harvester and mobile device; Blood oxygen vital sign harvester (hereinafter to be referred as blood oxygen harvester) links to each other with mobile device by the audio port of mobile device, and Oximetry application software (hereinafter to be referred as blood oxygen application software) is installed on the mobile device.
Fig. 2 is the structured flowchart of blood oxygen vital sign measurement system.As shown in Figure 2, blood oxygen harvester comprises power module, LED control module, PIN signal processing module, LED and PIN diode.Wherein power module links to each other with the L channel of audio frequency of mobile terminal mouth, and being responsible for the sinusoidal wave electrical signal conversion that portable terminal is exported by audio port is stable voltage output, for other module provides power supply output.The R channel of LED control module and portable terminal links to each other, and is responsible for utilizing the square-wave signal of portable terminal output to control switching and the size of current of two LED, thereby controls switching and the light intensity of HONGGUANG and infrared light.After amplifying through conversion, the signal of telecommunication that the PIN signal processing module is responsible for that PIN diode is produced outputs to the microphone channel of audio frequency of mobile terminal mouth.
Blood oxygen application software comprises electric power driving module, sensing driver module, sampling filter module, computing module, data memory module, data analysis module and remote communication module.Wherein electric power driving module is responsible for producing the sinusoidal wave audio frequency signal of fixed frequency, and outputs to the power module of harvester by the L channel of audio port.The sensing driver module is responsible for producing square-wave signal and is transported to the LED control module of harvester by the R channel of audio port, and driving LED produces HONGGUANG and infrared light.The sampling filter module is responsible for the analog signal sampling with the input of audio port microphone channel, then with its filtering, removes noise, and its DC component is separated with the AC compounent component.Computing module is responsible for calculating blood oxygen saturation numerical value according to DC component, calculates pulse values according to AC compounent.The numerical value that data storage module is responsible for calculating is stored into the persistence storage area of portable terminal.Data analysis module is responsible for analyzing the historical data that collects, and generates corresponding report.Remote communication module is responsible for image data is transferred to other place, to satisfy demands such as remote real-time monitoring, remote diagnosis, remote health analysis.
Fig. 3 is the basic flow sheet of blood oxygen vital sign measurement system.As shown in Figure 3:
Step 1 is the power supply power supply.The electric power driving module of blood oxygen application software passes through the L channel of mobile device sound card to the square wave of blood oxygen harvester output 22kHz, and specific implementation is exactly to play the square wave audio file of 22kHz.Power module in the blood oxygen harvester square wave is provided provide stable power output after a series of processing.The concrete processing procedure of power module is: at first the square wave of 22kHz boosts by booster transformer, carries out the FET rectification then, carries out realizing firm power output after the voltage stabilizing finally by crossing blocking diode and filter capacitor, is other treatment circuit power supplies.Wherein in the system of low pressure the dead band pressure drop to be arranged be the key issue of power module to rectification circuit.Want the transmission of peak power, if in rectification is handled, use the low pressure diode as DFLS120L, find that in actual measurement 80% power loss in the rectification has only 20% to be sent to load.If replace diode with FET, arrangement synchronously can be used in the minimizing loss usually.(circuit theory diagrams of power module are seen Fig. 4.）
Step 2 is driving and the control of LED.The sensing driver module of blood oxygen application software produces square wave, and specific implementation is play the square wave audio file exactly.Square wave is transferred to the LED control module of blood oxygen harvester by the audio port R channel.The LED control module utilizes the rising edge of square wave to control the switching of HONGGUANG and infrared light, two luminous tube exciting current sizes of the Control of Voltage sensor of the high level of square wave.The circuit of LED control module is by d type flip flop, and phase inverter is formed 1 binary counter, realizes the switching to two luminous tubes.Amplifier and triode constitute voltage-controlled constant-current circuit, realize the control to two luminous tube exciting current sizes.Circuit theory diagrams are seen Fig. 5.(more excellent scheme namely adopts digital signaling, utilizes mcu to control.）
Step 3 is the collection of blood oxygen vital sign.Led module is made up of two luminous tubes.One is sent HONGGUANG (wavelength 660nm).One is sent infrared light (wavelength 940nm).Two LED under the control of LED control module with 500 per second time division multiplexes.PIN diode alternately activates after being seen through health by two different LED, produces the signal of telecommunication that comprises blood oxygen information.
Step 4 is that PIN blood oxygen signal is handled.The PIN signal processing module by the current amplifier that amplifier constitutes, amplifies the MIC of portable terminal is sent in the back with voltage signal input by taking off current signal on the PIN sensor.Wherein amplifier is that AC and DC are amplified simultaneously, and DC may be very big, and AC may be very little, if signal can enter saturatedly when at this moment amplification is too high, at this moment should adopt suitable amplification, gives suitable gray scale by the control exciting current.Here select amplifier is the AD820 of ADI.The circuit theory diagrams of PIN signal processing module are seen Fig. 6.
(more excellent scheme namely adopts digital signaling, adopts mcu to be converted to digital signal, and it is mobile that digital signal is handled the back transmission.）
Step 5 is the sampling filter of blood oxygen signal.The sampling filter module of blood oxygen application software is at first to sampling with 1000sps from the blood oxygen analogue signal of microphone channel input.Extract the DC component of sampled result then, because the cut-off frequency that requires is very low, we adopt an iir filter to follow the tracks of DC component.Just obtain AC compounent by from input signal, deducting DC component then.Then we to adopt a corner frequency be 6Hz and 50Hz and with upper frequency, have-low-pass FIR filter of 50dB decay removes the above environmental noise of 50Hz in the AC compounent.At this moment the AC compounent signal is with regard to similar heart beating pulse by tremulous pulse.
Step 6 is numerical computations.At first the DC component of the blood oxygen signal of HONGGUANG and infrared light is calculated the RMS value, blood oxygen saturation obtains by the RMS value is taken the logarithm to be divided by.Pulse is by the sample number in 3 beats is counted to get.
Step 7 is that data store.We will be stored into the lane database that portable terminal carries by blood oxygen saturation and the pulse values that numerical computations obtains.Because the collection of blood oxygen generates data volume grow can be very fast, particularly under the situation that long-time continuous is measured, and the storage area of portable terminal is more limited, so the key issue that data store is the compression algorithm of data.The algorithm that we adopt is: if the measured value in a period of time is identical, will be by with the time started, and the concluding time, measure number of times, a record of attributes such as measured value is stored, and so then can record to store repeatedly measurement result with data.
Step 8 is data analysis.At first be that historical data is carried out data statistics, secondly can analyze according to specific requirement, as sleep analysis.Then analysis result is stored in the memory space of portable terminal by memory module.
Step 9 is data show.Take out data by data disaply moudle to the memory space of portable terminal, the real time data of current collection is shown on the screen of portable terminal, and the result of data analysis is shown on the screen in the mode of form and figure.
Step 10 is remote data transmission.Remote communication module utilizes gprs module, 3G module or the wifi module of portable terminal to be connected into the Internet, with image data in real time or bulk transfer to the server of far-end, realize real-time health monitoring, remote diagnosis, remote health analysis, functions such as teledata backup.
It should be noted last that above embodiment is only unrestricted in order to the technical program to be described.Although the present invention has been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (6)

1. blood oxygen instrument based on audio port communication is characterized in that comprising the physical hardware of power module, sensor control module, sensor, sensor signal processing module and standard audio interface;
Bear power delivery, control signal input and acquired signal output respectively by left channel signals transmission line, right-channel signals transmission line and the microphone signal transmission line of audio interface;
The control signal input of sensor control module connects the control signal incoming line of audio interface;
The input of power module connects the power supply transmission line of audio interface;
The outfan of sensor signal processing module connects the acquired signal outlet line of audio interface;
The control signal outfan of described sensor control module connects the control signal input of sensor;
The signal output part of described sensor connects the input of sensor signal processing module.
2. the blood oxygen instrument based on audio port communication according to claim 1 is characterized in that described power module comprises booster transformer, FET rectification circuit, blocking diode and filter capacitor; The primary side of described booster transformer is the input of power module; The primary side of booster transformer connects the input of FET rectification circuit; The outfan of FET rectification circuit connects the input of the ∏ shape circuit that is made of blocking diode and filter capacitor, and the outfan of ∏ shape circuit is the outfan of power module.
3. the blood oxygen instrument based on audio port communication according to claim 1 is characterized in that described sensor control module and sensor signal processing module are microprocessor or analog circuit.
4. the blood oxygen instrument based on audio port communication according to claim 3 is characterized in that described sensor comprises PIN diode, red-light LED and infrared light LED; Described PIN diode receives the light from red-light LED and infrared light LED; One end of PIN diode connects power supply, is the outfan of sensor;
One, the sensor control module is microprocessor with the sensor signal processing module: microprocessor control signal output is connected driving red-light LED and infrared light LED by drive circuit respectively; Simultaneously, this microprocessor is as the sensor signal processing module, and the outfan of sensor connects the signal input part of little processing;
Perhaps,
Two, the sensor control module is analog circuit, and it comprises:
A) 1 binary counter that is constituted by d type flip flop and phase inverter; The clock signal input terminal of d type flip flop connects the control signal incoming line of audio interface, and the outfan of d type flip flop connects two inputs of phase inverter; The anode of red-light LED and infrared light LED is connected to input and the outfan of phase inverter; The D end of d type flip flop connects the outfan of phase inverter;
B) the voltage-controlled constant-current circuit that is constituted by operational amplifier and triode; The high level input of operational amplifier connects the control signal incoming line of audio interface; The outfan of operational amplifier connects the base stage of audion, and the colelctor electrode of audion connects the negative electrode of red-light LED and infrared light LED; The low level input of operational amplifier connects the emitter stage of audion;
The sensor signal processing module is analog circuit, its structure is the input that the other end of an end of PIN diode connects amplifying circuit, the outfan of this amplifying circuit connects the acquired signal outlet line of audio interface, and this amplifying circuit is as the sensor signal processing module.
5. according to claim 3 or 4 described blood oxygen instrument based on audio port communication, it is characterized in that output end of microprocessor also comprises the blood oxygen levels outfan.
6. the blood oxygen instrument based on audio port communication according to claim 2 is characterized in that described power module also comprises farad capacitor, and this farad capacitor is in parallel with ∏ shape circuit.
CN 201320110855 2013-03-12 2013-03-12 Oximeter based on audio interface communication Expired - Fee Related CN203153748U (en)

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WO2014139354A1 (en) * 2013-03-12 2014-09-18 Lin Zhufa Oximeter based on audio interface communication
WO2014139337A1 (en) * 2013-03-12 2014-09-18 Lin Zhufa Personal medical product design method based on audio port
CN104573317A (en) * 2014-12-01 2015-04-29 南京信息职业技术学院 Photoelectric health parameter detector based on audio port
CN104640129A (en) * 2015-02-27 2015-05-20 成都富凯飞机工程服务有限公司 Mobile phone flight mode monitoring and managing device and use method thereof
CN105652744A (en) * 2015-12-31 2016-06-08 广西大学 Sensor expansion platform of intelligent terminal
WO2020125494A1 (en) * 2018-12-17 2020-06-25 中国科学院深圳先进技术研究院 Analysis processing method, apparatus, and device for biological signal

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CN201175331Y (en) * 2007-11-23 2009-01-07 秦皇岛市康泰医学系统有限公司 Finer clip type pulse blood oxygen device
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WO2012155245A1 (en) * 2011-05-17 2012-11-22 Lionsgate Technologies, Inc. Systems and methods for determining physiological characteristics of a patient using pulse oximetry
CN202256243U (en) * 2011-09-06 2012-05-30 余波 Blood glucose detector based on intelligent mobile phone
CN203153748U (en) * 2013-03-12 2013-08-28 林祝发 Oximeter based on audio interface communication

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014139354A1 (en) * 2013-03-12 2014-09-18 Lin Zhufa Oximeter based on audio interface communication
WO2014139337A1 (en) * 2013-03-12 2014-09-18 Lin Zhufa Personal medical product design method based on audio port
CN104573317A (en) * 2014-12-01 2015-04-29 南京信息职业技术学院 Photoelectric health parameter detector based on audio port
CN104573317B (en) * 2014-12-01 2017-06-16 南京信息职业技术学院 A kind of photo-electric health parameters detector based on audio port
CN104640129A (en) * 2015-02-27 2015-05-20 成都富凯飞机工程服务有限公司 Mobile phone flight mode monitoring and managing device and use method thereof
CN104640129B (en) * 2015-02-27 2018-04-13 成都富凯飞机工程服务有限公司 A kind of mobile phone offline mode monitoring and manager and its application method
CN105652744A (en) * 2015-12-31 2016-06-08 广西大学 Sensor expansion platform of intelligent terminal
WO2020125494A1 (en) * 2018-12-17 2020-06-25 中国科学院深圳先进技术研究院 Analysis processing method, apparatus, and device for biological signal

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