CN103271745B - Pulse blood oxygen simulation system and implementation method - Google Patents
Pulse blood oxygen simulation system and implementation method Download PDFInfo
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- CN103271745B CN103271745B CN201310223507.9A CN201310223507A CN103271745B CN 103271745 B CN103271745 B CN 103271745B CN 201310223507 A CN201310223507 A CN 201310223507A CN 103271745 B CN103271745 B CN 103271745B
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Abstract
The invention especially relates to a pulse blood oxygen simulation system and an implementation method. The pulse blood oxygen simulation system comprises a simulation finger module. The simulation finger module is placed between a pulse oximeter light-emitting tube and an optical receiver and connected with a simulation information processing module. The simulation finger module comprises a light screen for shielding light from the light-emitting tube to the optical receiver, an infrared light receiver and a red light and infrared light receiver are arranged between the light screen and the light-emitting tube, and a red light emitting tube is arranged between the light screen and the optical receiver. The pulse blood oxygen simulation system and the implementation method are based on the attenuation effect of biological tissues to light, the luminous intensity of the light-emitting tube is used for simulating absorption effects of hyperemia biological tissues to the red light and infrared light under different blood oxygen saturation degrees and pulse conditions, the problems of preparation and sources of blood samples are solved effectively, the repeatability is good, and the stability is high; and constant electronic devices which are easy to guarantee are adopted on the whole system, so that simulation of physiological parameters of the biological tissues is convenient and accurate.
Description
Technical field
The invention belongs to medical testing devices field, in particular to a kind of pulse blood oxygen emulation system and implementation method, utilize the luminous intensity of luminous tube to simulate congested biological tissue assimilation effect to HONGGUANG and infrared light under different blood oxygen saturation and pulse situation, efficiently solve the preparation of blood sample and carry out source problem.
Background technology
The operation principle of pulse blood oxygen instrument is according to HbO2 Oxyhemoglobin (HbO2) and reduced hemoglobin (Hb) absorption Spectrum characteristic in HONGGUANG and near infrared light region, with the light of two bundle different wave lengths, as the HONGGUANG of 660nm and the near infrared light human finger of 940nm, the position such as toe or ear-lobe, is detected the photoplethysmographic intensity of transmission (or reflection) by light-sensitive element.The line and staff control that this class loading is all made up of skin, blood, muscle, skeleton etc., light is at very large stable component (or claiming a DC component DC) flutter component (or claiming AC compounent AC) that above superposition one is less by the feature of the photoplethysmographic of this kind of organization formation.Its AC compounent is because blood engorgement tremulous pulse causes, and DC component is then blood flow through tremulous pulse while, by non-arterial portions, i.e. and the assimilation effect of the tissue such as muscle, venous blood, skin, skeleton to light.Four variablees can be obtained, i.e. HONGGUANG DC component, HONGGUANG AC compounent, infrared DC component, infrared AC compounent by the measurement of the photoplethysmographic to two-beam.Oximetry value can be calculated by these four components.
A kind of blood simulation circulating system can be set up to the detection of pulse blood oxygen instrument, fully be combined with finite concentration oxygen by the hypoxemia of deoxidation in the cyclic process of blood, obtain the blood of certain blood oxygen saturation, meanwhile, comparison and detection pulse blood oxygen instrument is carried out by the result of blood sampling method blood gas analysis.
The patent No. is U.S. patents disclosing " a kind of optical transmission simulation device (Light transmission simulator for pulse oximeter) of pulse oximeter " of US 2006/0247507 A1, wherein FIG.3C illustrates the implementation method of a similar device: first selectable gain platform (338) is for amplifying red signal light, second selectable gain platform (339) is for amplifying infrared signal, 3rd selectable gain platform (340) is for amplifying the mixed signal of HONGGUANG and infrared light, red signal light (353) after amplification is sent to voltage to current converter circuit (320), the current signal produced is used for driving LED 1(322), the AC signal of simulation HONGGUANG, the dimmer (324) that the AC signal of HONGGUANG is controlled by physiological signal machinery modulation is modulated, infrared signal (354) after amplification is sent to voltage to current converter circuit (360), the current signal produced is used for driving LED 2(361), the AC signal of simulation infrared light, the same with HONGGUANG AC signal, infrared light AC signal is modulated by another dimmer (363) being controlled by physiological signal machinery modulation, HONGGUANG after amplification and infrared signal are sent to signal that voltage produces to current converter circuit (321) for driving LED 3(323), the direct current signal of simulation HONGGUANG, infrared light, converge at optical material (optical waveguide) place through the HONGGUANG AC signal of ovennodulation, infrared light AC signal, HONGGUANG and infrared light direct current signal, the assimilation effect of imitated biological tissue to light is carried out with this, this device needs to use the light intensity of the dimmer of machinery modulation control luminous tube, needs to adopt multiple luminous tube, needs to adopt optical material (optical waveguide) to carry out the convergence etc. of HONGGUANG, infrared light, therefore this device implementation relative complex, repeats concordance control difficulty large.
Summary of the invention
Object of the present invention proposes a kind of pulse blood oxygen emulation system and implementation method, the light intensity of electronic device to luminous tube is utilized to control, electronic device is utilized to realize the convergence of HONGGUANG and infrared light, have employed the electronic devices and components that concordance is easy to ensure in the implementation procedure of whole system, only use one group of red light-emitting pipe, system implementations is simple.
To achieve these goals, technical scheme of the present invention is:
A kind of pulse blood oxygen emulation system, comprises the simulation finger module be positioned between pulse blood oxygen instrument luminous tube and pulse blood oxygen instrument optical receiver, and simulation finger module connects an analog information processing module; Wherein, described simulation finger module includes a dark slide, used in sunshade board is in blocking the light of pulse blood oxygen instrument luminous tube to pulse blood oxygen instrument optical receiver, infrared light receptor and HONGGUANG, infrared light receptor is provided with between dark slide and pulse blood oxygen instrument luminous tube, between dark slide and pulse blood oxygen instrument optical receiver, be provided with red light-emitting pipe, described infrared light receptor and HONGGUANG, infrared light receptor are receive the first silicon cell of infrared light and receive the second silicon cell of HONGGUANG, infrared light respectively.
Further, described red light-emitting pipe is made up of many red light-emitting tube side-by-sides scheme.
Further, described red light-emitting pipe is made up of two red light-emitting tube side-by-sides scheme.
Further, described dark slide is glass cloth epoxy circuit board to scheme, and two silicon cells are close to the one side that circuit board is arranged on circuit board side by side, and red light-emitting pipe is arranged on the another side of circuit board.
Further, described analog information processing module comprises a microprocessor to scheme, is connected with display module, key-press module, memory module, communication module and data processing module around microprocessor; Described data processing module comprises:
One connects by the first current/voltage converter circuit the simulation physiological signal DC quantity circuit that the first D/A converting circuit formed, and the input of the first current/voltage converter circuit connects described HONGGUANG, infrared light receptor;
One connects by the first D/A converting circuit DC signal output the simulation physiological signal of ac circuit that the second D/A converting circuit formed;
The HONGGUANG be made up of analog switch and the second current/voltage converter circuit, an infrared light split circuit; The electric current input of described second current/voltage converter circuit connects described infrared light receptor, the voltage of the second current/voltage converter circuit exports the control end of connecting analog switch, and the second D/A converting circuit AC signal exports the switch input terminal being connected a described analog switch with the first D/A converting circuit DC signal output respectively;
One forms simulation physiological signal perfusion degree AC signal output circuit by the 3rd D/A converting circuit; The input of the 3rd D/A converting circuit connects the second D/A converting circuit AC signal by described analog switch and exports;
A direct current signal exported through analog switch by first D/A converting circuit and the 3rd D/A converting circuit perfusion degree AC signal export to be added and form simulation human body physiological parameter signal output apparatus;
The signal of described simulation human body physiological parameter exports and is connected to described red light-emitting pipe through amplifier, drives red light-emitting pipe luminous;
Described microprocessor is respectively arranged with the first digital-to-analogue conversion control output, the second digital-to-analogue conversion controls to export and the 3rd digital-to-analogue conversion control output; Described three controls export and connect the first D/A converting circuit, the second D/A converting circuit and the 3rd D/A converting circuit respectively.
Scheme is further, described data processing module also comprises an ambient light interference module, described ambient light interference module exports by Microprocessor S3C44B0X the constant-current source that a reference voltage signal formed through digital-to-analogue conversion and operational amplifier form, and the output of constant-current source is connected to described red light-emitting pipe.
Based on a pulse blood oxygen Simulation Methods for pulse blood oxygen emulation system, comprise the simulation finger module be positioned between pulse blood oxygen instrument luminous tube and pulse blood oxygen instrument optical receiver, simulation finger module connects an analog information processing module; Wherein, described simulation finger module includes a dark slide, used in sunshade board is in blocking the light of pulse blood oxygen instrument luminous tube to pulse blood oxygen instrument optical receiver, infrared light receptor and HONGGUANG, infrared light receptor has been arranged side by side between dark slide and pulse blood oxygen instrument luminous tube, red light-emitting pipe is provided with between dark slide and pulse blood oxygen instrument optical receiver, described analog information processing module comprises a microprocessor, is connected with display module, key-press module, memory module, communication module and data processing module around microprocessor; Pulse blood oxygen instrument luminous tube starts luminescence, and the step of described pulse blood oxygen Simulation Methods comprises:
A. the calibration curve adopted according to pulse blood oxygen instrument and finger thickness information carry out to described HONGGUANG, infrared light receptor output signal the step that modulation treatment obtains DC signal output;
B. further signal madulation is carried out to described DC signal output and obtains according to the blood oxygen saturation of calibration curve and present day analog, pulse frequency numerical value the step that AC signal exports;
C. described AC signal is exported to the step of modulating and obtaining perfusion degree AC signal and exporting;
D. described DC signal output and perfusion degree AC signal are exported the step being added the signal output obtaining simulating human body physiological parameter;
E. the signal of described simulation human body physiological parameter exports and is connected to described red light-emitting pipe through amplifier, drives red light-emitting pipe light emitting step;
F. simulate the need of to surround lighting, if needed, then perform step red light-emitting pipe being driven to a superposition constant-current source; If do not needed, then directly perform step g;
G. the optical receiver of pulse blood oxygen instrument receives the light that red light-emitting pipe sends, and analytical calculation obtains result.
Scheme further, the step that the step obtaining DC signal output described in step a comprises HONGGUANG to direct current signal, infrared signal is separated; And described in step b, obtain the step that step comprises HONGGUANG to AC signal, infrared signal is separated that AC signal exports.
The present invention compared with prior art tool has the following advantages: the present invention by biological tissue to based on the attenuation effect of light, congested biological tissue assimilation effect to HONGGUANG and infrared light under different blood oxygen saturation and pulse situation is simulated by the luminous intensity of luminous tube, efficiently solve the preparation of blood sample and carry out source problem, reproducible, stability is strong; Due to whole system have employed concordance be easy to ensure electronic device make the simulation of biological tissue's physiological parameter more easy, accurate.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is present system schematic diagram;
Fig. 2 is HONGGUANG of the present invention, infrared light split circuit schematic diagram;
Fig. 3 is the inventive method flow chart.
Detailed description of the invention
Blood sample preparation is there is and carrys out source problem in the method setting up blood circulation when producing pulse blood oxygen instrument in batches.The present embodiment utilizes the luminous intensity of luminous tube to simulate congested biological tissue assimilation effect to HONGGUANG and infrared light under different blood oxygen saturation and pulse situation, efficiently solves the preparation of blood sample and carrys out source problem.
Embodiment 1:
A kind of pulse blood oxygen emulation system, see Fig. 1 and Fig. 2, described system comprises pulse blood oxygen instrument 9 and is positioned over the simulation finger module between the luminous tube of pulse blood oxygen instrument (red light-emitting pipe 91 and infrared light luminous tube 92) and the optical receiver 93 of pulse blood oxygen instrument, and simulation finger module connects an analog information processing module; Wherein, described simulation finger module includes a dark slide 12, used in sunshade board is in blocking the light of pulse blood oxygen instrument luminous tube to pulse blood oxygen instrument optical receiver, between dark slide and pulse blood oxygen instrument luminous tube, be provided with infrared light receptor 11 and HONGGUANG, infrared light receptor 10, between dark slide and pulse blood oxygen instrument optical receiver, be provided with red light-emitting pipe 14; Wherein, described infrared light receptor and HONGGUANG, infrared light receptor are receive the first silicon cell of infrared light and receive the second silicon cell of HONGGUANG, infrared light respectively, and described red light-emitting pipe is composed in series by two red light-emitting tube side-by-sides.
In embodiment, described red light-emitting pipe is made up of many red light-emitting tube side-by-sides, and the best is that described red light-emitting pipe is made up of two red light-emitting tube side-by-sides.
In embodiment, infrared light receptor receives the signal that Shi mono-tunnel only comprises infrared light information, for separating of HONGGUANG and infrared light; The signal that infrared light, HONGGUANG receptor receive comprises HONGGUANG information and infrared light information simultaneously.
In embodiment, described dark slide is by the circuit board of glass cloth by adhering with epoxy resin, and two silicon cells are close to the one side that circuit board is arranged on circuit board side by side, and red light-emitting pipe is arranged on the another side of circuit board.
In embodiment, described analog information processing module comprises a microprocessor 1, be connected with display module 2, key-press module 6, memory module 3, communication module 5, power module 4 and data processing module 7 around microprocessor, power module is powered to modules; Described data processing module comprises:
One connects by the first current/voltage converter circuit 75 the simulation physiological signal DC quantity circuit that first D/A converting circuit 71 formed, and the input of the first current/voltage converter circuit connects described HONGGUANG, infrared light receptor 10; First D/A converting circuit accepts the calibration curve (R curve) that adopts according to pulse blood oxygen instrument from microprocessor and finger thickness information is carried out preliminary modulation treatment obtain DC signal output 78 to described HONGGUANG, infrared light receptor output signal, wherein calibration curve (R curve) is arranged according to pulse blood oxygen instrument, finger thickness information can, according to the needs of simulation, be selected to arrange by button; Concrete modulation treatment be by the original current signal that collects after overcurrent to voltage conversion circuit, be multiplied by the coefficient determined according to calibration curve and finger thickness information and obtain DC signal output 78, simulate the DC quantity part of physiological signal with this;
One to be connected the second D/A converting circuit 72 and to be formed and simulate physiological signal of ac circuit with the first D/A converting circuit DC signal output, described second D/A converting circuit accepts the blood oxygen saturation of calibration curve and the present day analog adopted according to pulse blood oxygen instrument from microprocessor, pulse frequency numerical value carries out further signal madulation to described DC signal output and obtains AC signal output 79, wherein calibration curve is determined according to pulse blood oxygen instrument, the blood oxygen saturation of present day analog, pulse frequency numerical value is arranged by button, concrete method is according to current blood oxygen saturation information, obtain R value corresponding with current blood oxygen saturation in calibration curve, utilize the intervalometer of processor 1 simultaneously, be multiplied by the coefficient value relevant to R value to direct current signal 78 according to current pulse frequency numerical value timing, obtain AC signal and export 79, the of ac part of physiological signal is simulated with this,
HONGGUANG, an infrared light split circuit be made up of analog switch 713,714 and second current/voltage converter circuit 76; The electric current input of described second current/voltage converter circuit connects infrared light receptor 11, the voltage of the second current/voltage converter circuit exports the control end of connecting analog switch, and the second D/A converting circuit AC signal exports the switch input terminal being connected described analog switch with the first D/A converting circuit DC signal output respectively;
One forms simulation physiological signal perfusion degree AC signal output circuit by the 3rd D/A converting circuit 73; The input of the 3rd D/A converting circuit connects the second D/A converting circuit AC signal by described analog switch and exports; Described 3rd D/A converting circuit accepts to carry out modulation according to the perfusion degree information of present day analog to described AC signal output from microprocessor and obtains perfusion degree AC signal output 710, the perfusion degree message reflection of the described present day analog pulsatile blood flow situation of detected person, i.e. LBF perfusion ability.
First D/A converting circuit is exported 710 and is added the circuit forming simulation human body physiological parameter signals output 711 by one after the direct current signal that analog switch exports is amplified by amplifier 74 with the 3rd D/A converting circuit perfusion degree AC signal; The signal of described simulation human body physiological parameter exports and is connected to described red light-emitting pipe 14 through amplifier 13, drives red light-emitting pipe luminous;
Described microprocessor is respectively arranged with the first digital-to-analogue conversion control output, the second digital-to-analogue conversion controls to export and the 3rd digital-to-analogue conversion control output; Described three controls export and connect the first D/A converting circuit, the second D/A converting circuit and the 3rd D/A converting circuit respectively.
In embodiment, consider surround lighting factor, data processing module described in the present embodiment also comprises an ambient light interference module 8, described ambient light interference module exports by Microprocessor S3C44B0X the constant-current source that a reference voltage signal formed through digital-to-analogue conversion 715 and operational amplifier form, and the output of constant-current source is connected to described red light-emitting pipe.
In embodiment, AC signal 79 isolates HONGGUANG infrared light under the control of the signal 712 of the second current/voltage converter circuit 76, as the reference signal of the 3rd D/A converting circuit 73, microprocessor 1 exports 79 according to the perfusion degree information of present day analog to AC signal and carries out modulation treatment, simulates the AC signal 710 of physiological signal perfusion degree; The direct current signal 78 of analog DC amount part synthesizes the signal 711 of simulating human body physiological parameter and sends to simulate and points after amplifier 74 adjusts with the AC signal 710 of the of ac part of carrying perfusion degree information, for driving red light-emitting pipe after overvoltage to current converter circuit, utilize the light intensity imitated biological tissue of red light-emitting pipe to the assimilation effect of light; Describe more specifically and be exactly: processor is multiplied by with a perfusion degree relevant coefficient by the 3rd D/A converting circuit to the red signal light after separation and infrared signal according to perfusion degree information, simulates the AC signal 710 of physiological signal perfusion degree; Direct current signal 78 carries out sum operation through amplifier 74 and AC signal 710 by amplifier and synthesizes the signal 711 of simulating human body physiological parameter and send to simulate and point, luminous to current converter circuit rear drive red light-emitting pipe through overvoltage, what now the light intensity of red light-emitting pipe was simulated is the signal of optical signal after biological tissue of human body.
As shown in Figure 2, turning off when wherein the control end of analog switch 713 is " 0 ", is conducting time " 1 " for HONGGUANG described in embodiment, infrared light split circuit; And conducting when being " 0 " of the control end of analog switch 714, be turn off time " 1 ", it is the voltage pulse signal that " 0 " " 1 " converts that the second current/voltage converter circuit 76 exports.
Embodiment 2:
A kind of pulse blood oxygen Simulation Methods based on embodiment 1 pulse blood oxygen emulation system, the content of embodiment 1 is also the content of the present embodiment, see Fig. 1 and Fig. 3, comprise pulse blood oxygen instrument and be positioned over the simulation finger module between pulse blood oxygen instrument luminous tube and pulse blood oxygen instrument optical receiver, simulation finger module connects an analog information processing module; Wherein, described simulation finger module includes a dark slide, used in sunshade board is in blocking the light of pulse blood oxygen instrument luminous tube to pulse blood oxygen instrument optical receiver, infrared light receptor and HONGGUANG, infrared light receptor has been arranged side by side between dark slide and pulse blood oxygen instrument luminous tube, red light-emitting pipe is provided with between dark slide and pulse blood oxygen instrument optical receiver, described analog information processing module comprises a microprocessor, is connected with display module, key-press module, memory module, communication module and data processing module around microprocessor; Pulse blood oxygen instrument luminous tube starts luminescence, and the step of described pulse blood oxygen Simulation Methods comprises:
A. the calibration curve adopted according to pulse blood oxygen instrument and finger thickness information carry out to described HONGGUANG, infrared light receptor output signal the step that modulation treatment obtains DC signal output; Wherein calibration curve (R curve) is arranged according to pulse blood oxygen instrument, finger thickness information can according to the needs of simulation, select to arrange by button, concrete modulation treatment be by the original current signal that collects after overcurrent to voltage conversion circuit, be multiplied by the coefficient determined according to calibration curve and finger thickness information and obtain DC signal output, simulate the DC quantity part of physiological signal with this;
B. further signal madulation is carried out to described DC signal output and obtains according to the blood oxygen saturation of calibration curve and present day analog, pulse frequency numerical value the step that AC signal exports; Wherein calibration curve is determined according to pulse blood oxygen instrument, blood oxygen saturation, the pulse frequency numerical value of present day analog are arranged by button, concrete method is according to current blood oxygen saturation information, obtain R value corresponding with current blood oxygen saturation in calibration curve, utilize the intervalometer of processor simultaneously, be multiplied by the coefficient value relevant to R value according to current pulse frequency numerical value timing to direct current signal, obtain AC signal and export, simulate the of ac part of physiological signal with this;
C. described AC signal is exported to the step of modulating and obtaining perfusion degree AC signal and exporting;
D. described DC signal output and perfusion degree AC signal are exported the step being added the signal output obtaining simulating human body physiological parameter;
E. the signal of described simulation human body physiological parameter exports and is connected to described red light-emitting pipe through amplifier, drives red light-emitting pipe light emitting step;
F. simulate the need of to surround lighting, if needed, then perform step red light-emitting pipe being driven to a superposition constant-current source; That is: ambient light interference module superposition one constant current signal driven for emitting lights pipe in the basis of signals of signal through exporting after overvoltage to current converter circuit is luminous for the interference of simulated environment light to pulse blood oxygen instrument; If do not needed, then directly perform step g;
G. the optical receiver of pulse blood oxygen instrument receives the light that red light-emitting pipe sends, and analytical calculation obtains result.
The step that in the present embodiment, the step obtaining DC signal output described in step a comprises HONGGUANG to direct current signal, infrared signal is separated; And described in step b, obtain the step that step comprises HONGGUANG to AC signal, infrared signal is separated that AC signal exports.
The specific descriptions of above-mentioned steps as indicated at 3, the block diagram of Fig. 3 describes the flow process of this method, specific descriptions with reference to figure 1 are: simulation finger collection infrared light HONGGUANG information is also converted to the signal of telecommunication and sends analog information processing module to, analog information processing module comprises HONGGUANG by what receive, the mixed signal of infrared light information through overcurrent to voltage conversion circuit 75, current signal is converted to voltage signal 77, voltage signal 77 is as the reference signal of first D/A converting circuit 71, the calibration curve (R curve) adopted according to pulse blood oxygen instrument under the control of microprocessor 1 and finger thickness information carry out preliminary signal modulation process, obtain direct current signal 78, the DC quantity part of physiological signal is simulated with this, direct current signal 78 is as the reference signal of second D/A converting circuit 72, the blood oxygen saturation of the calibration curve that microprocessor 1 adopts according to pulse blood oxygen instrument and present day analog, pulse frequency numerical value carries out further signal madulation to signal, obtain AC signal 79, the of ac part of physiological signal is simulated with this, AC signal 79 isolates HONGGUANG infrared light under the control of the signal 712 of the second current/voltage converter circuit 76, as the reference signal of the 3rd D/A converting circuit 73, microprocessor 1 carries out modulation treatment according to the perfusion degree information of present day analog to AC signal 79, simulate the AC signal 710 of physiological signal perfusion degree, the direct current signal 78 of analog DC amount part synthesizes the signal 711 of simulating human body physiological parameter and sends to simulate and points, for driving red light-emitting pipe after overvoltage to current converter circuit after amplifier 74 adjusts with the AC signal 710 of the of ac part of carrying perfusion degree information, simultaneously, if when needing the interference of simulated environment light, Microprocessor S3C44B0X D/A converting circuit (715) exports a reference voltage signal, a constant-current source is formed with operational amplifier, the signal of constant-current source sends simulation finger to, utilizes the light intensity imitated biological tissue of red light-emitting pipe to the assimilation effect of light.
Claims (6)
1. a pulse blood oxygen emulation system, comprises the simulation finger module be positioned between pulse blood oxygen instrument luminous tube and pulse blood oxygen instrument optical receiver, and simulation finger module connects an analog information processing module; It is characterized in that, described simulation finger module includes a dark slide, used in sunshade board is in blocking the light of pulse blood oxygen instrument luminous tube to pulse blood oxygen instrument optical receiver, infrared light receptor and HONGGUANG, infrared light receptor is provided with between dark slide and pulse blood oxygen instrument luminous tube, between dark slide and pulse blood oxygen instrument optical receiver, be provided with red light-emitting pipe, described infrared light receptor and HONGGUANG, infrared light receptor are receive the first silicon cell of infrared light and receive the second silicon cell of HONGGUANG, infrared light respectively; Described dark slide is glass cloth epoxy circuit board, and two silicon cells are close to the one side that circuit board is arranged on circuit board side by side, and red light-emitting pipe is arranged on the another side of circuit board;
Described analog information processing module comprises a microprocessor, is connected with display module, key-press module, memory module, communication module and data processing module around microprocessor; Described data processing module comprises:
One connects by the first current/voltage converter circuit the simulation physiological signal DC quantity circuit that the first D/A converting circuit formed, and the input of the first current/voltage converter circuit connects described HONGGUANG, infrared light receptor;
One connects by the first D/A converting circuit DC signal output the simulation physiological signal of ac circuit that the second D/A converting circuit formed;
The HONGGUANG be made up of analog switch and the second current/voltage converter circuit, an infrared light split circuit; The electric current input of described second current/voltage converter circuit connects described infrared light receptor, the voltage of the second current/voltage converter circuit exports the control end of connecting analog switch, and the second D/A converting circuit AC signal exports the switch input terminal being connected a described analog switch with the first D/A converting circuit DC signal output respectively;
One forms simulation physiological signal perfusion degree AC signal output circuit by the 3rd D/A converting circuit; The input of the 3rd D/A converting circuit connects the second D/A converting circuit AC signal by described analog switch and exports;
A direct current signal exported through analog switch by first D/A converting circuit and the 3rd D/A converting circuit perfusion degree AC signal export to be added and form simulation human body physiological parameter signal output apparatus;
The signal of described simulation human body physiological parameter exports and is connected to described red light-emitting pipe through amplifier, drives red light-emitting pipe luminous;
Described microprocessor is respectively arranged with the first digital-to-analogue conversion control output, the second digital-to-analogue conversion controls to export and the 3rd digital-to-analogue conversion control output; Described three controls export and connect the first D/A converting circuit, the second D/A converting circuit and the 3rd D/A converting circuit respectively.
2. a kind of pulse blood oxygen emulation system according to claim 1, is characterized in that, described red light-emitting pipe is made up of many red light-emitting tube side-by-sides.
3. a kind of pulse blood oxygen emulation system according to claim 2, is characterized in that, described red light-emitting pipe is made up of two red light-emitting tube side-by-sides.
4. a kind of pulse blood oxygen emulation system according to claim 1, it is characterized in that, described data processing module also comprises an ambient light interference module, described ambient light interference module exports by Microprocessor S3C44B0X the constant-current source that a reference voltage signal formed through digital-to-analogue conversion and operational amplifier form, and the output of constant-current source is connected to described red light-emitting pipe.
5. based on a pulse blood oxygen Simulation Methods for pulse blood oxygen emulation system, comprise the simulation finger module be positioned between pulse blood oxygen instrument luminous tube and pulse blood oxygen instrument optical receiver, simulation finger module connects an analog information processing module; Wherein, described simulation finger module includes a dark slide, used in sunshade board is in blocking the light of pulse blood oxygen instrument luminous tube to pulse blood oxygen instrument optical receiver, infrared light receptor and HONGGUANG, infrared light receptor has been arranged side by side between dark slide and pulse blood oxygen instrument luminous tube, red light-emitting pipe is provided with between dark slide and pulse blood oxygen instrument optical receiver, described analog information processing module comprises a microprocessor, is connected with display module, key-press module, memory module, communication module and data processing module around microprocessor; Pulse blood oxygen instrument luminous tube starts luminescence, it is characterized in that, the step of described pulse blood oxygen Simulation Methods comprises:
A. the calibration curve adopted according to pulse blood oxygen instrument and finger thickness information carry out to described HONGGUANG, the signal of infrared light receptor after current/voltage converter circuit the step that modulation treatment obtains DC signal output;
B. further signal madulation is carried out to described DC signal output and obtains according to the blood oxygen saturation of calibration curve and present day analog, pulse frequency numerical value the step that AC signal exports;
C. described AC signal is exported to the step of modulating and obtaining perfusion degree AC signal and exporting;
D. described DC signal output and perfusion degree AC signal are exported the step being added the signal output obtaining simulating human body physiological parameter;
E. the signal of described simulation human body physiological parameter exports and is connected to described red light-emitting pipe through amplifier, drives red light-emitting pipe light emitting step;
F. simulate the need of to surround lighting, if needed, then perform step red light-emitting pipe being driven to a superposition constant-current source; If do not needed, then directly perform step g;
G. the optical receiver of pulse blood oxygen instrument receives the light that red light-emitting pipe sends, and analytical calculation obtains result.
6. a kind of pulse blood oxygen Simulation Methods based on pulse blood oxygen emulation system according to claim 5, is characterized in that, the step that the step obtaining DC signal output described in step a comprises HONGGUANG to direct current signal, infrared signal is separated; And described in step b, obtain the step that step comprises HONGGUANG to AC signal, infrared signal is separated that AC signal exports.
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| CN103892845B (en) * | 2014-04-08 | 2016-06-15 | 中国科学院微电子研究所 | A kind of system of measuring the oxygen content of blood |
| CN107550498B (en) * | 2016-06-30 | 2024-02-09 | 北京超思电子技术有限责任公司 | Blood oxygen measuring device and measuring method thereof |
| CN108095733B (en) * | 2017-09-25 | 2021-01-05 | 倍灵科技（知识产权）有限公司 | Test equipment and method for non-invasive blood analysis instrument |
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