CN104865208A - Gas analyzing and detecting device, system and data processing method - Google Patents
Gas analyzing and detecting device, system and data processing method Download PDFInfo
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- CN104865208A CN104865208A CN201510236455.8A CN201510236455A CN104865208A CN 104865208 A CN104865208 A CN 104865208A CN 201510236455 A CN201510236455 A CN 201510236455A CN 104865208 A CN104865208 A CN 104865208A
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Abstract
The invention provides a gas analyzing and detecting device, a system and a data processing method. The gas analyzing and detecting device comprises a laser, a quartz tuning fork, a probe, a data acquistion card, and a laser input signal generator; the output end of the laser input signal generator is connected with the input end of the laser; the laser emitted by the laser is respectively transmitted to the quartz tuning fork and the probe; the input end of the data acquistion card is respectively connected with the output end of the probe and the output end of the quartz tuning fork; the probe is used for converting an optical signal to an electric signal; and the data acquistion card is used for receiving the electric signal output by the probe and the quartz tuning fork. The gas analyzing and detecting device has the advantages of high sensitivity, small volume, strong anti-interference capacity, easy carrying, rapid speed, low cost and the like.
Description
Technical field
The present invention relates to breath analysis apparatus field, particularly relate to gas analysis pick-up unit, system and data processing method.
Background technology
13C breath test analyser is a kind of non-intrusion type, nothing wound, painless medical diagnostic equipment, CO in being exhaled by human body
2stable isotope
13cO
2/
12cO
2ratio, by calculate, clinically Accurate Diagnosis interviewee whether exist helicobacter pylori (HP) infect and various digestion organ function condition detection.
Based on gas detect, current scheme has:
1. based on the breath test analyser of infrared spectroscopic determination: mainly adopt Non-Dispersive Infra-red (NDIR) absorption spectroscopy (NDIR), use infrared light supply, adopt interference filter and single beam double-wavelengh technique simultaneously.
2. based on the breath test analyser of mass spectroscopic assays: carry out the method detected after being mainly separated by their mass-to-charge ratio by the ion of motion with Electric and magnetic fields, measure the compound composition that ion exact mass can determine ion.
But there is following defect in technology at present:
1. infra-red sepectrometry shortcoming:
Because infrared light supply wavelength coverage is wider, even if also not high by optical filter spectral purity out, spectral line width is still greater than the absorption line width of specific gas, by causing absorption cross jamming after gas cell, truly can not reflect the absorption of tested gas.To the poor selectivity of specific gas, background gas interference is large, and application condition is large, and design is complicated, and volume is large, and has moving component, responsive to ambient vibration.
2. mass spectroscopy shortcoming:
Although measuring accuracy is high, system complicated operation, detection speed is slow, not easily portable, and price is very expensive, is unfavorable for commercialization.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of gas analysis pick-up unit.
The invention provides a kind of gas analysis pick-up unit, comprise laser instrument, quartz tuning-fork, detector, data collecting card, laser instrument input signal generator, described laser instrument input signal generator output is connected with described laser input, the laser that described laser instrument sends transfers to described quartz tuning-fork and described detector respectively, described data collecting card input end is connected with described quartz tuning-fork output terminal with described detector output terminal respectively, described detector is used for converting light signal to electric signal, described data collecting card is for receiving the electric signal of described detector and the output of described quartz tuning-fork.
As a further improvement on the present invention, this gas analysis pick-up unit also comprises reference cell, and the laser that described laser instrument sends transfers to described detector through described reference cell.
As a further improvement on the present invention, this gas analysis pick-up unit also comprises light path mechanism, the laser that described laser instrument sends transfers to described quartz tuning-fork by described light path mechanism, and the laser that described laser instrument sends transfers to described detector by described light path mechanism, described reference cell successively.
As a further improvement on the present invention, described light path mechanism comprises semi-permeable mirror, collimation lens, condenser lens, catoptron, the laser that described laser instrument sends transfers to described quartz tuning-fork by described semi-permeable mirror, described collimation lens, described condenser lens successively, and the laser that described laser instrument sends transfers to described detector by described semi-permeable mirror, described catoptron, described reference cell successively.
As a further improvement on the present invention, this gas analysis pick-up unit also comprises lock-in amplifier, and described quartz tuning-fork output terminal is connected with described lock-in amplifier input end, and described lock-in amplifier output terminal is connected with described data collecting card input end.
As a further improvement on the present invention, this gas analysis pick-up unit also comprises prime amplifier, and described prime amplifier input end is connected with described quartz tuning-fork output terminal, and described prime amplifier output terminal is connected with described lock-in amplifier input end.
As a further improvement on the present invention, described laser instrument input signal generator is function generator, and described function generator output terminal is connected with described lock-in amplifier with described laser instrument respectively.
As a further improvement on the present invention, described laser instrument is distributed feedback laser or interband cascade lasers.
Present invention also offers a kind of system comprising described gas analysis pick-up unit, this system comprises terminal device, and described terminal device input end is connected with described data collecting card, and described terminal device output terminal is connected with described laser instrument.
Present invention also offers and a kind ofly use described gas analysis pick-up unit to carry out the method for data processing, the Data Over Cable that data collecting card is sampled or be wirelessly transmitted to processing module and carry out treatment and analysis, the object information that processing module obtains can show on mobile terminals, and object information can be shared to other equipment by mobile terminal.
The invention has the beneficial effects as follows: gas analysis pick-up unit of the present invention have highly sensitive, volume is little, antijamming capability is strong, be easy to portable, speed fast, low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
As shown in Figure 1, the invention discloses a kind of gas analysis pick-up unit, comprise laser instrument 1, quartz tuning-fork 2, detector 3, data collecting card 4, laser instrument input signal generator, described laser instrument input signal generator output is connected with described laser instrument 1 input end, the laser that described laser instrument 1 sends transfers to described quartz tuning-fork 2 and described detector 3 respectively, described data collecting card 4 input end is connected with described quartz tuning-fork 2 output terminal with described detector 3 output terminal respectively, described detector 3 is for converting light signal to electric signal, described data collecting card 4 is for receiving the electric signal of described detector 3 and described quartz tuning-fork 2 output.
This gas analysis pick-up unit also comprises reference cell 5, and the laser that described laser instrument 1 sends transfers to described detector 3 through described reference cell 5.
This gas analysis pick-up unit also comprises light path mechanism, the laser that described laser instrument 1 sends transfers to described quartz tuning-fork 2 by described light path mechanism, and the laser that described laser instrument 1 sends transfers to described detector 3 by described light path mechanism, described reference cell 5 successively.
Described light path mechanism comprises semi-permeable mirror 6, collimation lens 7, condenser lens 8, catoptron 9, the laser that described laser instrument 1 sends transfers to described quartz tuning-fork 2 by described semi-permeable mirror 6, described collimation lens 7, described condenser lens 8 successively, and the laser that described laser instrument 1 sends is passed 5 transported to described detector 3 by described semi-permeable mirror 6, described catoptron 9, described reference cell successively.
This gas analysis pick-up unit also comprises lock-in amplifier 10, and described quartz tuning-fork 2 output terminal is connected with described lock-in amplifier 10 input end, and described lock-in amplifier 10 output terminal is connected with described data collecting card 4 input end.
This gas analysis pick-up unit also comprises prime amplifier 11, and described prime amplifier 11 input end is connected with described quartz tuning-fork 2 output terminal, and described prime amplifier 11 output terminal is connected with described lock-in amplifier 10 input end.
Described laser instrument input signal generator is function generator 12, and described function generator 12 output terminal is connected with described lock-in amplifier 10 with described laser instrument 1 respectively.
Described laser instrument 1 is distributed feedback laser or interband cascade lasers; ICL laser instrument, English and Interband Cascade Lasers(interband cascade lasers), be called for short ICL laser instrument; DFB (Distributed Feedback Laser), i.e. distributed feedback laser.
Distributed feedback laser: adopt centre wavelength 2.74um Distributed Feedback Laser, 13CO2 and 12CO2 is utilized just to have strong absorption peak near 2.74um, and absorption peak close proximity, by the wavelength of scanning Distributed Feedback Laser, the gas absorption peak that 13CO2 and 12,CO2 two is different can be striden across.
Quartz tuning-fork 2: quartz tuning-fork is a kind of oscillating device utilizing the piezoelectric effect of quartz crystal to make.Piezoelectric effect comprises the content of direct piezo electric effect and inverse piezoelectric effect two aspects.When applying external force in a certain direction on some dielectric crystal, while generation deformation, there is contrary sign polarization charge in certain two relative surfaces at it.After external force is removed, deformation disappears, and two surfaces come back to not electriferous state, this just due to strain or stress, and produces electropolarized phenomenon and be called direct piezo electric effect.When the power applied is time dependent mechanical force, the electric current that deformation can be caused by the electrode covered on plane of crystal guides out.
Prime amplifier 11: Main Function is the signal to noise ratio (S/N ratio) of raising system, reduces external interference, is connected with the quartz tuning-fork 2 of detection signal, and signal amplifying and noise reducing is transferred to lock-in amplifier 10.
Detector 3: belong to photodetector, converts electric signal to light signal, for detecting the laser signal after by reference to pond 5, and is converted to electric signal transmission to data collecting card 4.
Reference cell 5: be a kind of closed gas reference pond, certain concentration gas is equipped with in inside, and gaseous species is identical with gas to be measured, Main Function is the impact that the change for eliminating filters center light intensity in measuring process causes to system.
Lock-in amplifier 10: lock-in amplifier 10 is the weak signal measurement analytical equipments based on coherent detection, and its core component is phase sensitive detector, forms primarily of multiplier sum-product intergrator.
Function generator 12: mainly comprise Current Control and temp. control function, produces sawtooth wave with sinusoidal wave as laser instrument input signal, and accurately controls laser temperature by resize ratio, integration, differential.
Data collecting card 4: refer to and automatically adopt non electrical quantity or electric quantity signal from the analog-and digital-unit under tests such as sensor and other Devices to test, deliver in host computer and carry out analyzing, processing.Data acquisition system (DAS) is that the measurement software and hardware product combined based on computing machine or other dedicated testing platforms realizes flexibly, user-defined measuring system.
The invention also discloses a kind of system comprising gas analysis pick-up unit, this system comprises terminal device 13, and described terminal device 13 input end is connected with described data collecting card 4, and described terminal device 13 output terminal is connected with described function generator 12.
Gas analysis pick-up unit of the present invention based on the principle of QEPAS technology, the principle based on QEPAS technology:
Quartz enhanced photoacoustic spectroscopy technology (Quartz Enhanced Photoacoustic Spectroscopy, QEPAS), mainly photoacoustic cell and microphone is replaced to accumulate and detect photoacoustic signal with quartz tuning-fork, the generation of photoacoustic signal depends on the periodic infrared absorption of detected gas, thus obtain the vibration signal of quartz tuning-fork, achieve the detection to trace gas content, utilize QEPAS technology to carry out gasometry detection, Beer-Lambert (Beer-lambert) law need be used simultaneously.
1) be replace microphone as photoacoustic signal sensor with quartz tuning-fork in quartz enhanced photoacoustic spectroscopy.Quartz tuning-fork is a kind of oscillating device utilizing the piezoelectric effect of quartz crystal to make.Piezoelectric effect comprises the content of direct piezo electric effect and inverse piezoelectric effect two aspects.When applying external force in a certain direction on some dielectric crystal, while generation deformation, there is contrary sign polarization charge in certain two relative surfaces at it.After external force is removed, deformation disappears, and two surfaces come back to not electriferous state, this just due to strain or stress, and produces electropolarized phenomenon and be called direct piezo electric effect.When the power applied is time dependent mechanical force, the electric current that deformation can be caused by the electrode covered on plane of crystal guides out.
2) Beer-Lambert (Beer-lambert) law, i.e. gas absorption law, 2.74um Distributed Feedback Laser is used in this patent, 13CO2 and 12CO2 is utilized just to have strong absorption peak near 2.74um, and absorption peak close proximity, can by the wavelength of scanning Distributed Feedback Laser, stride across the gas absorption peak that 13CO2 and 12,CO2 two is different, thus accurately obtain the different absorption of 13CO2 and 12CO2 and be reflected to the different vibration signal of quartz tuning-fork, and then calculate the ratio of 13CO2 and 12CO2, show whether interviewee infects HP.
Gas analysis pick-up unit of the present invention is used to carry out helicobacter pylori detection method: to be contained by oral
13after the urea reagent of C, infect if there is HP in interviewee's stomach, the urease be rich in HP can be by
13c urea decomposition is
13cO
2and NH3, and discharged by lung, like this by measuring in expiration
13cO
2with
12cO
2ratio, i.e. the diagnosable degree whether infecting HP and infection.
The invention also discloses and a kind ofly use described gas analysis pick-up unit to carry out the method for data processing, wired or wireless for the data collecting card processing module that transfers to is carried out treatment and analysis, the object information that processing module obtains can show on mobile terminals, and object information can be shared to other equipment by mobile terminal.This processing module can be arranged on gas analysis pick-up unit inside, or this processing module is arranged in terminal device 13, or this processing module is arranged in mobile terminal, by increasing the interconnected and open API ability of mobile phone A PP, realize " hard+soft+service " to organically combine, user can be allowed to understand oneself health status and historical data in real time, and can be exchanged by social platform and share personal information.
Gas analysis pick-up unit of the present invention have highly sensitive, volume is little, antijamming capability is strong, be easy to portable, speed fast, low cost and other advantages.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a gas analysis pick-up unit, it is characterized in that: comprise laser instrument, quartz tuning-fork, detector, data collecting card, laser instrument input signal generator, described laser instrument input signal generator output is connected with described laser input, the laser that described laser instrument sends transfers to described quartz tuning-fork and described detector respectively, described data collecting card input end is connected with described quartz tuning-fork output terminal with described detector output terminal respectively, described detector is used for converting light signal to electric signal, described data collecting card is for receiving the electric signal of described detector and the output of described quartz tuning-fork.
2. gas analysis pick-up unit according to claim 1, is characterized in that: this gas analysis pick-up unit also comprises reference cell, and the laser that described laser instrument sends transfers to described detector through described reference cell.
3. gas analysis pick-up unit according to claim 2, it is characterized in that: this gas analysis pick-up unit also comprises light path mechanism, the laser that described laser instrument sends transfers to described quartz tuning-fork by described light path mechanism, and the laser that described laser instrument sends transfers to described detector by described light path mechanism, described reference cell successively.
4. gas analysis pick-up unit according to claim 3, it is characterized in that: described light path mechanism comprises semi-permeable mirror, collimation lens, condenser lens, catoptron, the laser that described laser instrument sends transfers to described quartz tuning-fork by described semi-permeable mirror, described collimation lens, described condenser lens successively, and the laser that described laser instrument sends transfers to described detector by described semi-permeable mirror, described catoptron, described reference cell successively.
5. gas analysis pick-up unit according to claim 1, it is characterized in that: this gas analysis pick-up unit also comprises lock-in amplifier, described quartz tuning-fork output terminal is connected with described lock-in amplifier input end, and described lock-in amplifier output terminal is connected with described data collecting card input end.
6. gas analysis pick-up unit according to claim 5, it is characterized in that: this gas analysis pick-up unit also comprises prime amplifier, described prime amplifier input end is connected with described quartz tuning-fork output terminal, and described prime amplifier output terminal is connected with described lock-in amplifier input end.
7. gas analysis pick-up unit according to claim 5, is characterized in that: described laser instrument input signal generator is function generator, and described function generator output terminal is connected with described lock-in amplifier with described laser instrument respectively.
8. gas analysis pick-up unit according to claim 1, is characterized in that: described laser instrument is distributed feedback laser or interband cascade lasers.
9. one kind comprises the system of gas analysis pick-up unit described in any one of claim 1 to 8, it is characterized in that: this system comprises terminal device, described terminal device input end is connected with described data collecting card, and described terminal device output terminal is connected with described laser instrument input signal generator.
10. one kind uses gas analysis pick-up unit described in any one of claim 1 to 8 to carry out the method for data processing, the Data Over Cable that data collecting card is sampled or be wirelessly transmitted to processing module and carry out treatment and analysis, the object information that processing module obtains can show on mobile terminals, and object information can be shared to other equipment by mobile terminal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258798A (en) * | 2015-11-10 | 2016-01-20 | 华中科技大学 | A photoelectric detector spectral response test system and a measurement method thereof |
| CN105424648A (en) * | 2015-11-04 | 2016-03-23 | 山西大学 | Stable-power rapid-scanning absorption spectrum device and method based on polarization rotator |
| CN107121400A (en) * | 2017-06-16 | 2017-09-01 | 珠海任驰光电科技有限公司 | A kind of pseudo-differential wavelength modulation optical fiber concentration of methane gas detection means and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175791A (en) * | 2013-02-04 | 2013-06-26 | 山西大学 | Multi-quartz-crystal-oscillator spectral phonometer and gas detection device employing same |
| CN104237135A (en) * | 2014-10-22 | 2014-12-24 | 东北林业大学 | System and method for detecting CO gas based on quartz tuning fork enhanced photoacoustic spectrometry technology |
-
2015
- 2015-05-11 CN CN201510236455.8A patent/CN104865208A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175791A (en) * | 2013-02-04 | 2013-06-26 | 山西大学 | Multi-quartz-crystal-oscillator spectral phonometer and gas detection device employing same |
| CN104237135A (en) * | 2014-10-22 | 2014-12-24 | 东北林业大学 | System and method for detecting CO gas based on quartz tuning fork enhanced photoacoustic spectrometry technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424648A (en) * | 2015-11-04 | 2016-03-23 | 山西大学 | Stable-power rapid-scanning absorption spectrum device and method based on polarization rotator |
| CN105258798A (en) * | 2015-11-10 | 2016-01-20 | 华中科技大学 | A photoelectric detector spectral response test system and a measurement method thereof |
| CN107121400A (en) * | 2017-06-16 | 2017-09-01 | 珠海任驰光电科技有限公司 | A kind of pseudo-differential wavelength modulation optical fiber concentration of methane gas detection means and method |
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