CN103954561A - Photoacoustic spectrum detection device for detecting concentration of sulfur dioxide - Google Patents
Photoacoustic spectrum detection device for detecting concentration of sulfur dioxide Download PDFInfo
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- CN103954561A CN103954561A CN201410200574.3A CN201410200574A CN103954561A CN 103954561 A CN103954561 A CN 103954561A CN 201410200574 A CN201410200574 A CN 201410200574A CN 103954561 A CN103954561 A CN 103954561A
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- microphones
- detection controller
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- photoacoustic
- harmonic wave
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Abstract
The invention discloses a photoacoustic spectrum detection device for detecting concentration of sulfur dioxide. The device comprises an adjustable quantum cascaded laser, a chopper, a harmonic photoacoustic pool, multiple electret capacitive microphones, a lock-in amplifier, a motor, an analog/digital converter, a digital signal transmitter and a detection controller with a power supply and a USB (Universal Serial Bus) interface circuit, wherein the multiple electret capacitive microphones are configured on an outer wall of the harmonic photoacoustic pool and are uniformly distributed along the axial direction of the harmonic photoacoustic pool. Due to the arrangement of the multiple microphones, an error caused by a single microphone in the process of converting an electric signal can be reduced. Moreover, the multiple microphones are uniformly distributed along the axial direction of the harmonic photoacoustic pool, and errors caused by measurement positions of the microphones can be reduced.
Description
Technical field
The present invention relates to the optoacoustic spectroscopy pick-up unit for detection of sulfur dioxide concentration.
Background technology
The current optoacoustic spectroscopy pick-up unit for detection of sulfur dioxide concentration, its microphone is critical component, need 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 object of the present invention is to provide a kind of optoacoustic spectroscopy pick-up unit for detection of sulfur dioxide concentration, it is provided with a plurality of microphones, can reduce the error that single microphone causes when changing out electric signal, and a plurality of microphones are axially uniform along harmonic wave formula photoacoustic cell, can reduce the error causing due to microphone measuring position.
For achieving the above object, technical scheme of the present invention is a kind of optoacoustic spectroscopy pick-up unit for detection of sulfur dioxide concentration of design, comprises controlled variable qc laser, chopper, harmonic wave formula photoacoustic cell, a plurality of electret capacitor type microphone, lock-in amplifier, motor, analog to digital converter, digital signal transmitter and has power supply and the detection controller of usb circuit;
Described chopper is connected with motor;
The motor driver of described motor is connected with detection controller;
Described harmonic wave formula photoacoustic cell is connected with lock-in amplifier;
Described lock-in amplifier is connected with detection controller;
Described a plurality of electret capacitor type microphone is connected with digital signal transmitter;
Described digital signal transmitter is connected with detection controller;
Described controlled variable qc laser and analog to digital converter are all connected with detection controller;
Described a plurality of electret capacitor type microphone is configured on the outer wall of harmonic wave formula photoacoustic cell, and axially uniform along harmonic wave formula photoacoustic cell of described electret capacitor type microphone.
Advantage of the present invention and beneficial effect are: a kind of optoacoustic spectroscopy pick-up unit for detection of sulfur dioxide concentration is provided, it is provided with a plurality of microphones, can reduce the error that single microphone causes when changing out electric signal, and a plurality of microphones are axially uniform along harmonic wave formula photoacoustic cell, can reduce the error causing due to microphone measuring position.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
The concrete technical scheme of implementing of the present invention is:
As shown in Figure 1, for detection of an optoacoustic spectroscopy pick-up unit for sulfur dioxide concentration, comprise controlled variable qc laser 1, chopper 2, harmonic wave formula photoacoustic cell 3, a plurality of electret capacitor type microphone 4, lock-in amplifier 5, motor 6, analog to digital converter 7, digital signal transmitter 8 and there is power supply 11 and the detection controller 9 of usb circuit 12;
Described chopper 2 is connected with motor 6;
The motor driver 61 of described motor 6 is connected with detection controller 9;
Described harmonic wave formula photoacoustic cell 3 is connected with lock-in amplifier 5;
Described lock-in amplifier 5 is connected with detection controller 9;
Described a plurality of electret capacitor type microphone 4 is connected with digital signal transmitter 8;
Described digital signal transmitter 8 is connected with detection controller 9;
Described controlled variable qc laser 1 and analog to digital converter 7 are all connected with detection controller 9;
Described a plurality of electret capacitor type microphone 4 is configured on the outer wall of harmonic wave formula photoacoustic cell 3, and axially uniform along harmonic wave formula photoacoustic cell 3 of described electret capacitor type microphone 4.
Described detection controller 9 is connection data input media and display device also.
Advantage of the present invention and beneficial effect are: a kind of optoacoustic spectroscopy pick-up unit for detection of sulfur dioxide concentration is provided, it is provided with a plurality of microphones 4, can reduce the error that single microphone 4 causes when changing out electric signal, and a plurality of microphones 4 are axially uniform along harmonic wave formula photoacoustic cell 3, can reduce the error causing due to microphone 4 measuring positions.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of 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 (1)
1. for detection of the optoacoustic spectroscopy pick-up unit of sulfur dioxide concentration, it is characterized in that, comprise controlled variable qc laser, chopper, harmonic wave formula photoacoustic cell, a plurality of electret capacitor type microphone, lock-in amplifier, motor, analog to digital converter, digital signal transmitter and there is power supply and the detection controller of usb circuit;
Described chopper is connected with motor;
The motor driver of described motor is connected with detection controller;
Described harmonic wave formula photoacoustic cell is connected with lock-in amplifier;
Described lock-in amplifier is connected with detection controller;
Described a plurality of electret capacitor type microphone is connected with digital signal transmitter;
Described digital signal transmitter is connected with detection controller;
Described controlled variable qc laser and analog to digital converter are all connected with detection controller;
Described a plurality of electret capacitor type microphone is configured on the outer wall of harmonic wave formula photoacoustic cell, and axially uniform along harmonic wave formula photoacoustic cell of described electret capacitor type microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200574.3A CN103954561A (en) | 2014-05-14 | 2014-05-14 | Photoacoustic spectrum detection device for detecting concentration of sulfur dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200574.3A CN103954561A (en) | 2014-05-14 | 2014-05-14 | Photoacoustic spectrum detection device for detecting concentration of sulfur dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103954561A true CN103954561A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410200574.3A Pending CN103954561A (en) | 2014-05-14 | 2014-05-14 | Photoacoustic spectrum detection device for detecting concentration of sulfur dioxide |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807755A (en) * | 2015-04-23 | 2015-07-29 | 江西科技师范大学 | Multi-probe rapid photoacoustic detection apparatus for detecting components and contents of food additives and detecting method |
| CN107917879A (en) * | 2016-10-11 | 2018-04-17 | 重航空器研究公司 | The apparatus and method measured for particle and the optoacoustic of the light absorbs of gaseous species |
| CN110208205A (en) * | 2019-06-03 | 2019-09-06 | 南京工业大学 | Photo-acoustic spectrometer device based on photoacoustic cell mechanism |
| CN110715905A (en) * | 2018-07-13 | 2020-01-21 | 横河电机株式会社 | Spectrum measuring apparatus |
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| US4818882A (en) * | 1986-05-27 | 1989-04-04 | Aktieselskabet Bruel & Kjaer | Photoacoustic gas analyzer |
| JPH04143636A (en) * | 1990-10-05 | 1992-05-18 | Yokogawa Electric Corp | Photoacoustic cell |
| WO1996031765A1 (en) * | 1995-04-05 | 1996-10-10 | Nyfotek A/S | Photoacoustic measuring apparatus |
| CN101881728A (en) * | 2009-05-06 | 2010-11-10 | 中国科学院半导体研究所 | Device and method for detecting sulfur dioxide gas |
| CN102226752A (en) * | 2011-04-08 | 2011-10-26 | 常熟舒茨电子科技发展有限公司 | Method for detecting concentration of sulfur dioxide by using photoacoustic spectrometry |
| CN202075218U (en) * | 2011-04-23 | 2011-12-14 | 常熟舒茨电子科技发展有限公司 | Sulfur dioxide concentration detecting device by photoacoustic spectrometry |
| CN202562842U (en) * | 2012-05-11 | 2012-11-28 | 江苏舒茨测控设备有限公司 | Device for detecting concentration of trace vapor employing optoacoustic spectroscopy |
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2014
- 2014-05-14 CN CN201410200574.3A patent/CN103954561A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4818882A (en) * | 1986-05-27 | 1989-04-04 | Aktieselskabet Bruel & Kjaer | Photoacoustic gas analyzer |
| JPH04143636A (en) * | 1990-10-05 | 1992-05-18 | Yokogawa Electric Corp | Photoacoustic cell |
| WO1996031765A1 (en) * | 1995-04-05 | 1996-10-10 | Nyfotek A/S | Photoacoustic measuring apparatus |
| CN101881728A (en) * | 2009-05-06 | 2010-11-10 | 中国科学院半导体研究所 | Device and method for detecting sulfur dioxide gas |
| CN102226752A (en) * | 2011-04-08 | 2011-10-26 | 常熟舒茨电子科技发展有限公司 | Method for detecting concentration of sulfur dioxide by using photoacoustic spectrometry |
| CN202075218U (en) * | 2011-04-23 | 2011-12-14 | 常熟舒茨电子科技发展有限公司 | Sulfur dioxide concentration detecting device by photoacoustic spectrometry |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807755A (en) * | 2015-04-23 | 2015-07-29 | 江西科技师范大学 | Multi-probe rapid photoacoustic detection apparatus for detecting components and contents of food additives and detecting method |
| CN104807755B (en) * | 2015-04-23 | 2017-03-08 | 江西科技师范大学 | The quick photoacoustic detection device of Multi probe for food additive component and content and method |
| CN107917879A (en) * | 2016-10-11 | 2018-04-17 | 重航空器研究公司 | The apparatus and method measured for particle and the optoacoustic of the light absorbs of gaseous species |
| CN107917879B (en) * | 2016-10-11 | 2022-08-30 | 重航空器研究公司 | Apparatus and method for photoacoustic measurement of light absorption of particles and gaseous species |
| CN110715905A (en) * | 2018-07-13 | 2020-01-21 | 横河电机株式会社 | Spectrum measuring apparatus |
| CN110208205A (en) * | 2019-06-03 | 2019-09-06 | 南京工业大学 | Photo-acoustic spectrometer device based on photoacoustic cell mechanism |
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Application publication date: 20140730 |