CN204439527U - A kind of gas residue pick-up unit - Google Patents
A kind of gas residue pick-up unit Download PDFInfo
- Publication number
- CN204439527U CN204439527U CN201520094271.8U CN201520094271U CN204439527U CN 204439527 U CN204439527 U CN 204439527U CN 201520094271 U CN201520094271 U CN 201520094271U CN 204439527 U CN204439527 U CN 204439527U
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- CN
- China
- Prior art keywords
- microphone
- photoacoustic cell
- lock
- gas
- analysis processor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- OBTWBSRJZRCYQV-UHFFFAOYSA-N sulfuryl difluoride Chemical compound FS(F)(=O)=O OBTWBSRJZRCYQV-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000005935 Sulfuryl fluoride Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000004867 photoacoustic spectroscopy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model is a kind of gas residue pick-up unit, comprises light source, and the light source back lower place is provided with chopper, and chopper rear is provided with optical filter; Optical filter is connected with photoacoustic cell, is provided with a microphone group above photoacoustic cell, is provided with No. two microphone groups below photoacoustic cell, and described photoacoustic cell bottom front is provided with gas feed, and bottom rear is provided with gas vent, and photoacoustic cell rear portion is connected with infrared moisture sensor; A microphone group and No. two microphone groups are connected with analysis processor, and analysis processor is connected with display; Described analysis processor comprises a lock-in amplifier, No. two lock-in amplifiers, data acquisition unit, data quantitative analyzer, alarms.The utility model effectively can avoid measuring error, when gas residue excessive concentration, can reminding user in time, and improve the accuracy measured.
Description
Technical field
The utility model relates to gas detection equipment field, particularly relates to a kind of gas residue pick-up unit.
Background technology
At present for detecting the optoacoustic spectroscopy pick-up unit of sulfuryl fluoride gas residual concentration, its microphone is critical component, needs to change out electric signal by microphone, and the microphone quantity of optoacoustic spectroscopy pick-up unit is single at present, setting position neither be quite reasonable, easily causes measuring error.
Summary of the invention
The utility model is intended to solve the difficult problem that common sulfuryl fluoride gas residue detection instrument exists measuring error, and provides a kind of gas residue pick-up unit.
For achieving the above object, provide a kind of gas residue pick-up unit, comprise light source, the light source back lower place is provided with chopper to the utility model, and chopper rear is provided with optical filter; Optical filter is connected with photoacoustic cell, is provided with a microphone group above photoacoustic cell, is provided with No. two microphone groups below photoacoustic cell, and described photoacoustic cell bottom front is provided with gas feed, and bottom rear is provided with gas vent, and photoacoustic cell rear portion is connected with infrared moisture sensor; A microphone group and No. two microphone groups are connected with analysis processor, and analysis processor is connected with display; Described analysis processor comprises a lock-in amplifier, No. two lock-in amplifiers, data acquisition unit, data quantitative analyzer, alarms, a lock-in amplifier is connected with a microphone group, No. two lock-in amplifiers are connected with No. two microphone groups, data acquisition unit is connected with No. two lock-in amplifiers with a lock-in amplifier, data quantitative analyzer is connected with data acquisition unit, and alarm is connected with data quantitative analyzer.
Described light source is non-interfering infrared source.
Described optical filter is wave number is 860, and centre wavelength is the narrow band pass filter of 11.6 microns.
Described photoacoustic cell is disresonance cylindrical structure.
A described microphone group adopts vibration sensing degree to be less than the micro-microphone of silicon of 1dB.
The beneficial effects of the utility model are: a kind of gas residue pick-up unit described in the utility model is easy to use, effectively can avoid measuring error, when gas residue excessive concentration, can reminding user in time, and improve the accuracy measured.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of gas residue pick-up unit described in the utility model;
Wherein: 1-light source; 2-chopper; 3-optical filter; 4-photoacoustic cell; 41-gas feed; 42-gas vent; 5-microphone group; 6-analysis processor; 61-lock-in amplifier; 62-No. bis-lock-in amplifiers; 63-data acquisition unit; 64-data quantitative analyzer; 65-alarm; 7-No. bis-microphone groups; 8-infrared moisture sensor; 9-display.
Embodiment
Be described in detail with reference to accompanying drawing below with reference to embodiment of the present utility model.
As shown in Figure 1, a kind of gas residue pick-up unit, comprises light source 1, and light source 1 back lower place is provided with chopper 2, and chopper 2 rear is provided with optical filter 3; Optical filter 3 is connected with photoacoustic cell 4, be provided with a microphone group 5 above photoacoustic cell 4, be provided with No. two microphone groups 7 below photoacoustic cell 4, described photoacoustic cell 4 bottom front is provided with gas feed 41, bottom rear is provided with gas vent 42, and photoacoustic cell 4 rear portion is connected with infrared moisture sensor 8; A microphone group 5 and No. two microphone groups 7 are connected with analysis processor 6, and analysis processor 6 is connected with display 9; Described analysis processor 6 comprises a lock-in amplifier 61, No. two lock-in amplifiers 62, data acquisition unit 63, data quantitative analyzer 64, alarms 65, a lock-in amplifier 61 is connected with a microphone group 5, No. two lock-in amplifiers 62 are connected with No. two microphone groups 7, data acquisition unit 63 is connected with No. two lock-in amplifiers 62 with a lock-in amplifier 61, data quantitative analyzer 64 is connected with data acquisition unit 63, and alarm 65 is connected with data quantitative analyzer 64.
Described light source 1 is non-interfering infrared source.
Described optical filter 3 is wave numbers is 860, and centre wavelength is the narrow band pass filter of 11.6 microns.
Described photoacoustic cell 4 is disresonance cylindrical structure.
A described microphone group 5 adopts vibration sensing degree to be less than the micro-microphone of silicon of 1dB.
Embodiment
Light source 1 sends light and is transmitted into chopper 2, cuts light by chopper 2, forms light modulated; Light modulated is irradiated to after on optical filter 3, and forming arrowband can modulated spectrum, is irradiated to photoacoustic cell 4; The electric signal that a lock-in amplifier 61 and No. two lock-in amplifiers 62 export for amplifying microphone 5; Electric signal after the amplification that described data acquisition unit 63 exports for synthetical collection lock-in amplifier 61 and No. two lock-in amplifiers 62; Data quantitative analyzer 64 is for carrying out overall treatment to the electric signal after each amplification, and complete the quantitative test of vikane residual concentration, the detection of vikane concentration is completed with this, when the state measured and fructufy, display in the display, when concentration being detected higher than setting value, transmit a signal to alarm, alarm gives the alarm.The present invention is provided with two microphone groups, can reduce the error that single microphone causes when changing out electric signal.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a gas residue pick-up unit, comprises light source (1), and light source (1) back lower place is provided with chopper (2), and chopper (2) rear is provided with optical filter (3), it is characterized in that, optical filter (3) is connected with photoacoustic cell (4), photoacoustic cell (4) top is provided with a microphone group (5), photoacoustic cell (4) below is provided with No. two microphone groups (7), described photoacoustic cell (4) bottom front is provided with gas feed (41), bottom rear is provided with gas vent (42), and photoacoustic cell (4) rear portion is connected with infrared moisture sensor (8), a microphone group (5) and No. two microphone groups (7) are connected with analysis processor (6), and analysis processor is connected with display (9), described analysis processor (6) comprises a lock-in amplifier (61), No. two lock-in amplifiers (62), data acquisition unit (63), data quantitative analyzer (64), alarm (65), a lock-in amplifier (61) is connected with a microphone group (5), No. two lock-in amplifiers (62) are connected with No. two microphone groups (7), data acquisition unit (63) is connected with No. two lock-in amplifiers (62) with a lock-in amplifier (61), data quantitative analyzer (64) is connected with data acquisition unit (63), alarm (65) is connected with data quantitative analyzer (64).
2. a kind of gas residue pick-up unit according to claim 1, is characterized in that, described light source (1) is non-interfering infrared source.
3. a kind of gas residue pick-up unit according to claim 2, is characterized in that, described optical filter (3) is wave number is 860, and centre wavelength is the narrow band pass filter of 11.6 microns.
4. a kind of gas residue pick-up unit according to claim 3, is characterized in that, described photoacoustic cell (4) is disresonance cylindrical structure.
5. a kind of gas residue pick-up unit according to claim 4, is characterized in that, a described microphone group (5) adopts vibration sensing degree to be less than the micro-microphone of silicon of 1dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520094271.8U CN204439527U (en) | 2015-02-10 | 2015-02-10 | A kind of gas residue pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520094271.8U CN204439527U (en) | 2015-02-10 | 2015-02-10 | A kind of gas residue pick-up unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204439527U true CN204439527U (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520094271.8U Expired - Fee Related CN204439527U (en) | 2015-02-10 | 2015-02-10 | A kind of gas residue pick-up unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204439527U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769973A (en) * | 2017-03-03 | 2017-05-31 | 江苏舒茨测控设备股份有限公司 | Ammonia gas detection means and method are detected using photocaustic spectroscopy |
| CN111122445A (en) * | 2018-11-01 | 2020-05-08 | 西安电子科技大学 | Multiple resonance type T-shaped enhanced simultaneous detection method for multiple trace gases |
| CN111122444A (en) * | 2018-11-01 | 2020-05-08 | 西安电子科技大学 | Multiple resonant T-shaped enhanced multiple trace gas simultaneous detection device |
-
2015
- 2015-02-10 CN CN201520094271.8U patent/CN204439527U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769973A (en) * | 2017-03-03 | 2017-05-31 | 江苏舒茨测控设备股份有限公司 | Ammonia gas detection means and method are detected using photocaustic spectroscopy |
| CN111122445A (en) * | 2018-11-01 | 2020-05-08 | 西安电子科技大学 | Multiple resonance type T-shaped enhanced simultaneous detection method for multiple trace gases |
| CN111122444A (en) * | 2018-11-01 | 2020-05-08 | 西安电子科技大学 | Multiple resonant T-shaped enhanced multiple trace gas simultaneous detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 |
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| CF01 | Termination of patent right due to non-payment of annual fee |