CN206526050U - A kind of synchronous rf conversion infrared scanning system - Google Patents
A kind of synchronous rf conversion infrared scanning system Download PDFInfo
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- CN206526050U CN206526050U CN201621035757.5U CN201621035757U CN206526050U CN 206526050 U CN206526050 U CN 206526050U CN 201621035757 U CN201621035757 U CN 201621035757U CN 206526050 U CN206526050 U CN 206526050U
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- light source
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- voltage controlled
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Abstract
The utility model provides a kind of synchronous rf conversion infrared scanning system, including processor, potentiometer, operational amplifier, voltage controlled oscillator, light source emitting module and light source detecting module；The processor, potentiometer, operational amplifier and voltage controlled oscillator are linked in sequence successively；The light source emitting module and light source detecting module are connected with the voltage controlled oscillator respectively, and the voltage controlled oscillator is used for the synchronous radiofrequency signal that same frequency is exported to light source emitting module and light source detecting module.The utility model is simple in construction, it is easy to use, interference free performance is more excellent, and compared with prior art, the relative changing value of oxyhemoglobin and reduced hemoglobin can not only be detected by the near-infrared ripple relative gain detected, both absolute content values are can also detect that, thus, testing result is more accurate.
Description
Technical field
The utility model is related to the research of human body potential function and technical field of medical instruments, is synchronously penetrated more particularly, to a kind of
Frequency transform infrared scanning system.
Background technology
Near-infrared light source can be according to its specific wavelength, by the erythrocyte and surrounding tissue area of venae subcutaneae or artery
Do not come.At near infrared band (700nm~1000nm), low absorption, the characteristic of high scattering is presented in bio-tissue, to near-infrared
Light has the higher transparency, therefore, it is possible to detect the organizational information of certain depth, while this wave-length coverage is also referred to as life
The optical window of the nondestructive measurement of thing tissue.
In addition, near infrared spectroscopy can be used for the quantitative detection of each histoorgan blood oxygen saturation of human body, due to brain tissue
Blood supply, the importance of oxygen supply, the research to brain tissue are especially paid close attention to.Oxyhemoglobin, reduced hemoglobin are near red
Wave section has certain absorption, and both absorption spectrums have certain difference, thus also causes near infrared spectrum NIRS
(Near-Infrared Spectroscopy) Oximetry technology is developed rapidly, and is able to extensively should in clinical studies
With.
Near-infrared spectrum technique is to close the absorption spectrum with reduced hemoglobin, cytochrome oxidase etc. as base using oxygen
Plinth, it is contemplated that oxyhemoglobin, in the otherness of near infrared light wave band absorption spectra, is being organized with reduced hemoglobin with reference to light
In propagation law, using near infrared light to highly organized penetration capacity, research light absorbs, dissipated after a series of in the tissue
The biochemical information related to absorption spectra that rear emergent light is carried is penetrated, by being surveyed to the relative change that these absorption colors roll into a ball concentration
Amount, obtains the oxygen content of blood change information in tissue.
The characteristics of lossless to human body, noninvasive, radiationless because this technology has, it is adaptable to gathered to human body long term data
And tracking measurement, therefore may be widely used for psychology, cognitive science, clinical medicine and brain-computer interface.In addition, the technology
With other Medical Imaging Technologies (such as：MRI, CT, PET) compare, had a clear superiority in temporal resolution, but spatial resolution
It is relatively low.Existing near-infrared brain scanning probe device, generally coordinates optical filtering, or certain wave using broad spectrum light source
Long LED is relatively fixed as light source, and the frequency domain of detection device, thus, and result of detection precision is relatively low.
Utility model content
The purpose of this utility model is to provide a kind of synchronous rf conversion infrared scanning system, to solve in the prior art
The frequency domain of presence is relatively fixed, and can only obtain and monitor the relative amount of hemoglobin, the relatively low technology of result of detection precision
Problem.
In order to solve the above technical problems, a kind of synchronous rf conversion infrared scanning system that the utility model is provided, described
Synchronous rf conversion infrared scanning system includes processor, potentiometer, operational amplifier, voltage controlled oscillator, light source emitting module
With light source detecting module；
The processor, potentiometer, operational amplifier and voltage controlled oscillator are linked in sequence successively；
The light source emitting module and light source detecting module are connected with the voltage controlled oscillator respectively,
The voltage controlled oscillator is used for the synchronous radio frequency that same frequency is exported to light source emitting module and light source detecting module
Signal.
Further, the voltage controlled oscillator includes the first voltage controlled oscillator and the second voltage controlled oscillator；First pressure
Controlled oscillator and second voltage controlled oscillator are set up in parallel,
First voltage controlled oscillator is connected with the light source detecting module；
Second voltage controlled oscillator is connected with the light source emitting module.
Further, the potentiometer is high-precision digital adjustable potentiometer.
Further, the processor is microprocessor, and microprocessor is connected with computer.
Further, the synchronous rf conversion infrared scanning system also includes the high-precision divider of fixed value, the computing
Amplifier and the potentiometer are connected with the high-precision divider of fixed value respectively.
Further, the high-precision divider of the fixed value is connected with voltage reference component.
Further, the light source emitting module is used to send out the near infrared light with the same frequency；It is described
Light source emitting module includes light source driving circuit, light source power adjustment unit, amplitude adjusting elements and transmitter；The transmitting
Device is connected with the amplitude adjusting elements and the light source power adjustment unit respectively.
The light source power adjustment unit includes the digital regulation resistance being connected with the light source driving circuit, digital regulation resistance
It is connected with the transmitter, the light source power for adjusting transmitter；
The amplitude adjusting elements are used for the amplitude for adjusting the transmitter, and the amplitude adjusting elements include being sequentially connected
Linear voltage regulator, variable attenuator and digital regulation resistance, variable attenuator respectively with light source driving circuit, the transmitter with
And second voltage controlled oscillator connection.
Further, the transmitter is laser generator.
Further, it is the light source detecting module includes being sequentially connected detector, micro-signalamplifier, frequency mixer, low
Bandpass filter and low-frequency amplifier；
The detector is used to receive the near infrared light；
The micro-signalamplifier is used for high frequency current transitions into sine voltage；
The frequency mixer is used to demodulate difference frequency signal, and frequency mixer is connected with the voltage controlled oscillator.
Further, the low-frequency amplifier is connected by data acquisition module with the processor.
Further, the detector is optical-electrical converter.
Further, the detector is photoelectric receiving diode or laser pickoff.
Using above-mentioned technical proposal, the utility model has the advantages that：
A kind of synchronous rf conversion infrared scanning system that the utility model is provided, it is simple in construction, it is easy to use, it is anti-interference
Performance is more excellent, and compared with prior art, oxygen conjunction can not only be detected by the near-infrared ripple relative gain detected
The relative changing value of hemoglobin and reduced hemoglobin, can also detect that both absolute content values, thus, testing result
It is more accurate.
Brief description of the drawings
Below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation for the synchronous rf conversion infrared scanning system that Fig. 1 provides for the utility model embodiment；
The light source detecting module structure for the synchronous rf conversion infrared scanning system that Fig. 2 provides for the utility model embodiment
Schematic diagram；
Launching fiber or receive the partially schematic of light guide bundles spherical end that Fig. 3 provides for the utility model embodiment
Figure；
Reference：
10- light source detecting modules；11- processors；
12- detectors；13- micro-signalamplifiers；
14- frequency mixers；15- low pass filters；
16 low-frequency amplifiers；20- light source emitting modules；
30- voltage controlled oscillators；The voltage controlled oscillators of 31- first；
The voltage controlled oscillators of 32- second；33- operational amplifiers；
The high-precision divider of 34- fixed values；The high-precision digital adjustable potentiometers of 35-；
36- voltage reference components；50- computers.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only
Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
Explanation is further explained to the utility model with reference to specific embodiment.
The structural representation for the synchronous rf conversion infrared scanning system that Fig. 1 provides for the utility model embodiment；Such as Fig. 1
It is shown, a kind of synchronous rf conversion infrared scanning system that the present embodiment is provided, it includes processor 11, potentiometer 35, computing
Amplifier 33, voltage controlled oscillator 30, light source emitting module 20 and light source detecting module 10；
Processor 11, potentiometer 35, operational amplifier 33 and voltage controlled oscillator 30 are linked in sequence successively；
Light source emitting module 20 and light source detecting module 10 are connected with voltage controlled oscillator 30 respectively,
Voltage controlled oscillator is used for the synchronous radio frequency that same frequency is exported to light source emitting module 20 and light source detecting module 10
Signal.
Voltage controlled oscillator 30 includes the first voltage controlled oscillator 31 and the second voltage controlled oscillator 32；The He of first voltage controlled oscillator 31
Second voltage controlled oscillator 32 is set up in parallel,
First voltage controlled oscillator 31 is connected with light source detecting module 10；
Second voltage controlled oscillator 32 is connected with light source emitting module 20.
Potentiometer 35 is high-precision digital adjustable potentiometer 35.
Processor 11 is microprocessor, and microprocessor is connected with computer 50.
Synchronous rf conversion infrared scanning system also includes the high-precision divider 34 of fixed value, operational amplifier 33 and potentiometer
35 are connected with the high-precision divider of fixed value 34 respectively.
The high-precision divider 34 of fixed value is connected with voltage reference component 36.
Light source emitting module 20 is used to send out the near infrared light with same frequency；
Light source emitting module 20 includes light source driving circuit, light source power adjustment unit, amplitude adjusting elements and transmitting
Device；Transmitter is connected with amplitude adjusting elements and light source power adjustment unit respectively.
Light source power adjustment unit includes the digital regulation resistance being connected with light source driving circuit, digital regulation resistance and transmitter
Connection, the light source power for adjusting transmitter；
Amplitude adjusting elements are used for the amplitude for adjusting transmitter, and amplitude adjusting elements include the linear voltage stabilization being sequentially connected
Device, variable attenuator and digital regulation resistance, variable attenuator respectively with light source driving circuit, transmitter and the second VCO
Device 32 is connected.
Preferably, transmitter is laser generator.
The light source detecting module structure for the synchronous rf conversion infrared scanning system that Fig. 2 provides for the utility model embodiment
Schematic diagram.
As shown in Fig. 2 light source detecting module 10 includes detector 12, micro-signalamplifier 13, the frequency mixer being sequentially connected
14th, low pass filter 15 and low-frequency amplifier 16；
Detector 12 is used to receive near infrared light；
Micro-signalamplifier 13 is used for high frequency current transitions into sine voltage；
Frequency mixer 14 is used to demodulate difference frequency signal, and frequency mixer 14 is connected with voltage controlled oscillator 30；
Low-frequency amplifier 16 is connected by data acquisition module with processor 11.
Wherein, detector 12 is optical-electrical converter.Preferably, detector 12 is laser pickoff.
Launching fiber or receive the partially schematic of light guide bundles spherical end that Fig. 3 provides for the utility model embodiment
Figure.
As shown in figure 3, the launching fiber of transmitter or the spherical that the end for receiving light guide bundles 43 of detector is evagination.
When deployed, the structure top pressure scalp of the spherical of launching fiber or reception light guide bundles 43, launching fiber and reception
The end of light guide bundles 43 and the contact area of scalp increase, it is possible thereby to expand the receiving area for receiving light guide bundles, and for hair
Optical fiber is penetrated, then is conducive to increasing investigation depth.
Using above-mentioned technical proposal, the utility model has the advantages that：
A kind of synchronous rf conversion infrared scanning system that the utility model is provided, it is simple in construction, it is easy to use, it is anti-interference
Performance is more excellent, and compared with prior art, oxygen conjunction can not only be detected by the near-infrared ripple relative gain detected
The relative changing value of hemoglobin and reduced hemoglobin, can also detect that both absolute content values, thus, testing result
It is more accurate.
Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (10)
1. a kind of synchronous rf conversion infrared scanning system, it is characterised in that including processor, potentiometer, operational amplifier, pressure
Controlled oscillator, light source emitting module and light source detecting module；
The processor, potentiometer, operational amplifier and voltage controlled oscillator are linked in sequence successively；
The light source emitting module and light source detecting module are connected with the voltage controlled oscillator respectively,
The voltage controlled oscillator is used for the synchronous radiofrequency signal that same frequency is exported to light source emitting module and light source detecting module.
2. synchronous rf conversion infrared scanning system according to claim 1, it is characterised in that the voltage controlled oscillator bag
Include the first voltage controlled oscillator and the second voltage controlled oscillator；First voltage controlled oscillator and second voltage controlled oscillator are set side by side
Put,
First voltage controlled oscillator is connected with the light source detecting module；
Second voltage controlled oscillator is connected with the light source emitting module.
3. synchronous rf conversion infrared scanning system according to claim 1, it is characterised in that the potentiometer is high-precision
Digital adjustable potentiometer.
4. synchronous rf conversion infrared scanning system according to claim 1, it is characterised in that the processor is micro- place
Device is managed, microprocessor is connected with computer.
5. synchronous rf conversion infrared scanning system according to claim 1, it is characterised in that the synchronous rf conversion
Infrared scanning system also includes the high-precision divider of fixed value, and the operational amplifier and the potentiometer are high-precision with fixed value respectively
Divider is connected.
6. synchronous rf conversion infrared scanning system according to claim 5, it is characterised in that high-precision point of the fixed value
Depressor is connected with voltage reference component.
7. synchronous rf conversion infrared scanning system according to claim 1, it is characterised in that the light source detecting module
Including the detector being sequentially connected, micro-signalamplifier, frequency mixer, low pass filter and low-frequency amplifier；
The detector is used to receive near infrared light；
The micro-signalamplifier is used for high frequency current transitions into sine voltage；
The frequency mixer is used to demodulate difference frequency signal, and frequency mixer is connected with the voltage controlled oscillator.
8. synchronous rf conversion infrared scanning system according to claim 7, it is characterised in that the low-frequency amplifier leads to
Data acquisition module is crossed to be connected with the processor.
9. synchronous rf conversion infrared scanning system according to claim 7, it is characterised in that the detector is photoelectricity
Converter.
10. synchronous rf conversion infrared scanning system according to claim 8, it is characterised in that the detector is light
Electric reception diode or laser pickoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035757.5U CN206526050U (en) | 2016-08-31 | 2016-08-31 | A kind of synchronous rf conversion infrared scanning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035757.5U CN206526050U (en) | 2016-08-31 | 2016-08-31 | A kind of synchronous rf conversion infrared scanning system |
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| Publication Number | Publication Date |
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| CN206526050U true CN206526050U (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621035757.5U Expired - Fee Related CN206526050U (en) | 2016-08-31 | 2016-08-31 | A kind of synchronous rf conversion infrared scanning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116530932A (en) * | 2023-03-21 | 2023-08-04 | 北京师范大学 | Signal receiving and transmitting module for frequency domain near infrared imaging system |
-
2016
- 2016-08-31 CN CN201621035757.5U patent/CN206526050U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116530932A (en) * | 2023-03-21 | 2023-08-04 | 北京师范大学 | Signal receiving and transmitting module for frequency domain near infrared imaging system |
| CN116530932B (en) * | 2023-03-21 | 2024-02-13 | 北京师范大学 | Signal receiving and transmitting module for frequency domain near infrared imaging system |
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Granted publication date: 20170929 Termination date: 20180831 |