CN112362625A - Sulfur dioxide detection device and sulfur dioxide detection method - Google Patents
Sulfur dioxide detection device and sulfur dioxide detection method Download PDFInfo
- Publication number
- CN112362625A CN112362625A CN202011251392.0A CN202011251392A CN112362625A CN 112362625 A CN112362625 A CN 112362625A CN 202011251392 A CN202011251392 A CN 202011251392A CN 112362625 A CN112362625 A CN 112362625A
- Authority
- CN
- China
- Prior art keywords
- ultraviolet
- sulfur dioxide
- quartz tube
- light
- optical filter
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention relates to the technical field of gas detection, and on one hand, the invention provides a sulfur dioxide detection device which comprises a reaction chamber, an ultraviolet light emission source and an ultraviolet detector, wherein a light gathering system and a quartz tube are arranged in the reaction chamber, and the quartz tube is communicated with the external environment; the ultraviolet light emission source is a semiconductor laser generator, and the light condensing system is used for condensing deep ultraviolet laser emitted by the ultraviolet light emission source to the quartz tube to generate a fluorescent signal, and transmitting the fluorescent signal to the ultraviolet detector after the fluorescent signal is condensed. In another aspect, the present invention provides a method for detecting sulfur dioxide. The invention has reasonable design and simple structure, adopts the semiconductor laser generator as the light source for generating the deep ultraviolet laser, has the volume far smaller than the conventional light sources such as xenon lamps, zinc lamps and the like used in the prior art, ensures that the detection device has smaller volume and convenient maintenance, is convenient to construct a distributed real-time monitoring network and realizes the distributed measurement of the sulfur dioxide in the atmospheric environment.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a sulfur dioxide detection device and a sulfur dioxide detection method.
Background
Sulfur dioxide is one of the major atmospheric pollutants. At present, people can detect sulfur dioxide in the environment based on fluorescence spectroscopy, and a fluorescence spectroscopy measurement means is a measurement method which utilizes 220nm ultraviolet light to excite sulfur dioxide molecules to generate 340nm fluorescence signals, so that the concentration of the sulfur dioxide molecules is reversely deduced according to the intensity of the fluorescence signals. At present, a xenon lamp, a zinc lamp and the like are commonly used as light sources for emitting ultraviolet light in the device for detecting sulfur dioxide in the prior art, and a photomultiplier is used as a detector for a fluorescent signal, so that the gaseous detection device is large in size and complex in maintenance, and therefore distributed measurement is not convenient to realize.
Content of application
The first purpose of the present invention is to provide a sulfur dioxide detecting device, which uses a semiconductor laser generator as a light source for laser generation, the volume of the semiconductor laser generator is far smaller than that of conventional light sources such as xenon lamp and zinc lamp used in the prior art, and uses a gallium nitride avalanche diode device as a detector for ultraviolet fluorescence signal, and the volume of the semiconductor laser generator is far smaller than that of a photomultiplier device. The application of the two-aspect technology enables the size of the detection device to be smaller, maintenance is convenient, a distributed real-time monitoring network can be established, and distributed measurement is achieved.
The second purpose of the invention is to provide a sulfur dioxide detection method, which can realize real-time detection of sulfur dioxide in an environment, and the detection result is more accurate and reliable.
The embodiment of the invention is realized by the following technical scheme:
on one hand, the invention provides a sulfur dioxide detection device which comprises a reaction chamber, an ultraviolet light emission source and an ultraviolet detector, wherein a light gathering system and a quartz tube are arranged in the reaction chamber, and the quartz tube is communicated with the external environment;
the ultraviolet light emission source is a semiconductor laser generator, and the light condensation system is used for converging deep ultraviolet laser emitted by the ultraviolet light emission source to the quartz tube to generate a fluorescent signal, converging the fluorescent signal and transmitting the converged fluorescent signal to the ultraviolet detector.
Through the aforesaid setting, when examining, semiconductor laser generator sends dark ultraviolet laser, and transmit to the quartz capsule through the indoor condensing system of reaction, because quartz capsule and external environment intercommunication, consequently, be mingled with in the gaseous quartz capsule that flows in of sulfur dioxide, after dark ultraviolet laser shines on the quartz capsule arouses the sulfur dioxide molecule, thereby produce fluorescence signal, and again assemble back transmission to the ultraviolet detector with fluorescence signal by condensing system, thereby produce and sulfur dioxide concentration direct ratio's fluorescence photoelectric signal, with this concentration that realizes detecting sulfur dioxide. Compared with conventional light sources such as xenon lamps and zinc lamps in the prior art, the semiconductor laser generator has the advantages that the size is greatly reduced, so that the size of the whole sulfur dioxide detection device is reduced, the maintenance is convenient, and the distributed monitoring network is more convenient and reliable to construct.
Optionally, the light condensing system includes a first light filter, a first focusing mirror, a concave mirror, a second focusing mirror, and a second light filter; the first optical filter is arranged on the wall of the reaction chamber and is opposite to the ultraviolet light emission source; the first focusing mirror is opposite to the first optical filter and the quartz tube; the concave mirror and the second focusing mirror are symmetrically distributed on two sides of the quartz tube and are vertical to the incidence direction of the deep ultraviolet laser; the second optical filter is arranged on the wall of the reaction chamber and is opposite to the second focusing mirror; the second optical filter corresponds to the ultraviolet detector.
Optionally, the semiconductor laser generator is an aluminum gallium nitride photodiode.
Optionally, the ultraviolet detector is a gallium nitride ultraviolet avalanche diode detector.
Optionally, the second focusing lens is a quartz focusing lens, and the second focusing lens is hemispherical.
Optionally, the first optical filter has a central wavelength of 220nm and a bandwidth of 10nm, and the second optical filter has a central wavelength of 340nm and a bandwidth of 80 nm.
Optionally, the ultraviolet radiation detector further comprises a power supply control device, an amplifier and an analog-to-digital converter, wherein the power supply control device is electrically connected with the ultraviolet radiation emission source, the ultraviolet detector, the amplifier and the analog-to-digital converter respectively, the amplifier is electrically connected with the ultraviolet detector, and the analog-to-digital converter is electrically connected with the amplifier.
Optionally, the mobile terminal further comprises a data transmission module, and the data transmission module is electrically connected with the analog-to-digital converter.
On the other hand, the invention provides a sulfur dioxide detection method, which comprises a sulfur dioxide detection device, wherein the sulfur dioxide detection device comprises a power supply control device, an amplifier, an analog-to-digital converter, an ultraviolet light emission source, a reaction chamber and an ultraviolet detector; the ultraviolet light emitting source is a semiconductor laser generator; a light gathering system and a quartz tube are arranged in the reaction chamber; the power supply control device is respectively and electrically connected with the ultraviolet light emission source, the ultraviolet detector, the amplifier and the analog-to-digital converter, the ultraviolet detector is electrically connected with the amplifier, and the amplifier is electrically connected with the analog-to-digital converter; the detection process comprises the following steps:
s1, outputting electric pulses through the power supply control device to enable the ultraviolet light emission source to emit deep ultraviolet laser;
s2, exciting the deep ultraviolet laser to generate a fluorescent signal after the deep ultraviolet laser is reacted with the quartz tube through the light condensing system;
s3, transmitting the fluorescence signal to the ultraviolet detector to generate a fluorescence photoelectric signal;
and S4, the fluorescent photoelectric signal is amplified by the amplifier and then transmitted to the analog-to-digital converter, and the fluorescent photoelectric signal is converted into a digital signal by the analog-to-digital converter and then output.
Optionally, the light condensing system includes a first optical filter, a first focusing mirror, a concave mirror, a second focusing mirror, and a second optical filter, and the step of reacting the deep ultraviolet laser light with the quartz tube through the light condensing system in step S2 includes:
s21, the deep ultraviolet laser is incident to the first focusing lens after being filtered by the first optical filter, and is transmitted to the quartz tube after being converged by the first focusing lens;
s22, reacting the deep ultraviolet laser with gas in the quartz tube to generate a fluorescent signal;
and S23, the fluorescent signal is reflected by the concave mirror and then transmitted to the second focusing mirror for further convergence, and the converged fluorescent signal is filtered by the second optical filter and then transmitted to the ultraviolet detector.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
1. the invention has reasonable design and simple structure, adopts the semiconductor laser generator as the light source for generating the deep ultraviolet laser, has the volume far smaller than the conventional light sources such as xenon lamps, zinc lamps and the like used in the prior art, ensures that the detection device has smaller volume and convenient maintenance, is convenient to construct a distributed real-time monitoring network and realizes the distributed measurement of the sulfur dioxide in the atmospheric environment.
2. The sulfur dioxide detection method provided by the invention can realize real-time detection of sulfur dioxide in the environment, and the detection result is more accurate and reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a sulfur dioxide detection device provided in embodiment 1 of the present invention;
FIG. 2 is an optical schematic diagram of the inside of a reaction chamber provided in embodiment 1 of the present invention.
Icon: the system comprises a reaction chamber 1, an ultraviolet light emitting source 2, an ultraviolet detector 3, a quartz tube 4, a first optical filter 5, a first focusing mirror 6, a concave mirror 7, a second focusing mirror 8, a second optical filter 9, a power supply control device 10, an amplifier 11, an analog-to-digital converter 12 and a data transmission module 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a sulfur dioxide detecting device, which includes a reaction chamber 1, an ultraviolet light emitting source 2 and an ultraviolet detector 3, wherein a light condensing system and a quartz tube 4 are disposed inside the reaction chamber 1, and the quartz tube 4 is communicated with an external environment;
the ultraviolet light emission source 2 is a semiconductor laser generator, in this embodiment, the semiconductor laser generator may be, but is not limited to, an aluminum gallium nitride photodiode, the light condensing system is configured to condense deep ultraviolet laser light emitted by the ultraviolet light emission source 2 to the quartz tube 4 to generate a fluorescence signal, and to condense the fluorescence signal and transmit the fluorescence signal to the ultraviolet detector 3, and the ultraviolet detector 3 may be, but is not limited to, a gallium nitride ultraviolet avalanche diode detector.
Through the aforesaid setting, when examining, semiconductor laser generator sends dark ultraviolet laser, and transmit to quartz capsule 4 through the condensing system in the reacting chamber 1 on, because quartz capsule 4 and external environment intercommunication, consequently, the gas that is mingled with the sulfur dioxide flows into quartz capsule 4 in, after dark ultraviolet laser shines on quartz capsule 4, arouse the sulfur dioxide molecule, thereby produce fluorescence signal, and again by condensing system with fluorescence signal assemble the back transmission to ultraviolet detector 3 in, thereby produce and sulfur dioxide concentration direct ratio's fluorescence photoelectric signal, with this concentration that realizes detecting the sulfur dioxide. Compared with conventional xenon lamps, zinc lamps and other light sources in the prior art, the semiconductor laser generator greatly reduces the volume, so that the whole sulfur dioxide detection device is reduced in volume, convenient to maintain and more convenient and reliable in building a distributed monitoring network.
Specifically, in the present embodiment, the light condensing system includes a first filter 5, a first focusing mirror 6, a concave mirror 7, a second focusing mirror 8, and a second filter 9. Wherein, the central wavelength of the first optical filter 5 is 220nm and the bandwidth is 10nm, the central wavelength of the second optical filter 9 is 340nm and the bandwidth is 80nm
The reaction chamber 1 is provided with a light inlet hole and a light outlet hole, the first optical filter 5 is arranged in the light inlet hole on the wall of the reaction chamber 1 and is opposite to the ultraviolet light emission source 2, so that other light except short-wave ultraviolet light in the deep ultraviolet laser is filtered, and the short-wave ultraviolet light capable of exciting sulfur dioxide gas is obtained; the first focusing lens 6 is over against the first optical filter 5 and the quartz tube 4, and the short-wave ultraviolet light obtained by the first optical filter 5 is converged by the first focusing lens 6 and then emitted onto the quartz tube 4, so that sulfur dioxide gas in the quartz tube 4 is excited to generate a fluorescent signal; the concave mirror 7 and the second focusing mirror 8 are symmetrically distributed on two sides of the quartz tube 4 and are vertical to the incidence direction of the deep ultraviolet laser, wherein the mirror surface of the concave mirror 7 is opposite to the quartz tube 4, and the fluorescent signal generated by excitation of the quartz tube 4 is reflected to the second focusing mirror 8 by the concave mirror 7 after being incident to the concave mirror 7; the second optical filter 9 is arranged in a light outlet hole on the wall of the reaction chamber 1 and is opposite to the second focusing mirror 8, the fluorescent signal further converged by the second focusing mirror 8 is emitted to the second optical filter 9, and the scattered light in the fluorescent signal is filtered by the second optical filter 9; the second optical filter 9 corresponds to the ultraviolet detector 3, and the fluorescent signal filtered by the second optical filter 9 is received by the ultraviolet detector 3, so that a fluorescent photoelectric signal proportional to the concentration of sulfur dioxide is generated.
In order to further improve the focusing effect, the scattered light in the fluorescence signal is effectively removed. The second focusing lens 8 is a quartz focusing lens, the second focusing lens 8 is a hemispherical lens, wherein the spherical surface of the second focusing lens 8 is used as an incident surface, and the plane in the second focusing lens 8 is used as an exit surface and is opposite to the second optical filter 9.
It should be noted that, the above-mentioned light-gathering system can realize the detection of sulfur dioxide by the fluorescence spectroscopy, and the concave mirror 7 and the hemispherical quartz focusing mirror are used as the convergence device of the fluorescence signal, so that the convergence effect of the fluorescence signal can be improved, and the detection device has a more compact structure and a light weight.
In addition, the detection device further comprises a power supply control device 10, an amplifier 11 and an analog-to-digital converter 12, wherein the power supply control device 10 is electrically connected with the ultraviolet light emission source 2, the ultraviolet detector 3, the amplifier 11 and the analog-to-digital converter 12 respectively, wherein the power supply control device 10 is used for providing electric pulses with pulse width of 500-. The amplifier 11 is electrically connected to the ultraviolet detector 3 to amplify the fluorescent photoelectric signal generated by the ultraviolet detector 3, and the analog-to-digital converter 12 is electrically connected to the amplifier 11 to convert the amplified fluorescent photoelectric signal into a digital signal. Meanwhile, the detection device further comprises a data transmission module 13, and the data transmission module 13 is electrically connected with the analog-to-digital converter 12. Therefore, the final signal obtained by detection is transmitted to an externally arranged main base station in a wireless or wired transmission mode through the data transmission module 13, and the arrangement of the distributed monitoring network aiming at sulfur dioxide detection can be realized.
Example 2
The embodiment provides a sulfur dioxide detection method, which includes a sulfur dioxide detection device for detecting sulfur dioxide, where the sulfur dioxide detection device has the same structure as the detection device of embodiment 1, and specifically includes a power supply control device 10, an amplifier 11, an analog-to-digital converter 12, an ultraviolet light emission source 2, a reaction chamber 1, and an ultraviolet detector 3; the ultraviolet light emission source 2 is a semiconductor laser generator; a light gathering system and a quartz tube 4 are arranged in the reaction chamber 1; the power supply control device 10 is respectively electrically connected with the ultraviolet light emission source 2, the ultraviolet detector 3, the amplifier 11 and the analog-to-digital converter 12, the ultraviolet detector 3 is electrically connected with the amplifier 11, and the amplifier 11 is electrically connected with the analog-to-digital converter 12; the detection process comprises the following steps:
s1, outputting an electric pulse with the pulse width of 500ns and the pulse repetition frequency of 1KHz by a power supply control device 10 to enable an ultraviolet light emission source 2 to emit deep ultraviolet laser;
s2, exciting the deep ultraviolet laser to generate a fluorescent signal after the deep ultraviolet laser is reacted with the quartz tube 4 through a light condensing system;
s3, transmitting the fluorescent signal to an ultraviolet detector 3 to generate a fluorescent photoelectric signal;
and S4, the fluorescent photoelectric signal is amplified by the amplifier 11 and then transmitted to the analog-to-digital converter 12, and the fluorescent photoelectric signal is converted into a digital signal by the analog-to-digital converter 12 and then output.
Specifically, in this embodiment, the light collecting system includes a first filter 5, a first focusing mirror 6, a concave mirror 7, a second focusing mirror 8, and a second filter 9, and the structure and the specific connection relationship thereof are the same as those of the light collecting system in embodiment 1.
Wherein, the step of the deep ultraviolet laser reacting with the quartz tube 4 through the light condensing system in the step S2 comprises:
s21, the deep ultraviolet laser is filtered by a first optical filter 5 and then enters a first focusing lens 6 to obtain short-wave ultraviolet light, and the short-wave ultraviolet light is transmitted to a quartz tube 4 after being converged by the first focusing lens 6;
s22, reacting the deep ultraviolet laser with gas in the quartz tube 4 to generate a fluorescent signal;
and S23, the fluorescent signal is reflected by the concave mirror 7 and then transmitted to the second focusing mirror 8 for further convergence, and the converged fluorescent signal is filtered by the second optical filter 9 and then transmitted to the ultraviolet detector 3.
Example 3
The embodiment provides a sulfur dioxide detection method, which includes a sulfur dioxide detection device for detecting sulfur dioxide, where the sulfur dioxide detection device has the same structure as the detection device of embodiment 1, and specifically includes a power supply control device 10, an amplifier 11, an analog-to-digital converter 12, an ultraviolet light emission source 2, a reaction chamber 1, and an ultraviolet detector 3; the ultraviolet light emission source 2 is a semiconductor laser generator; a light gathering system and a quartz tube 4 are arranged in the reaction chamber 1; the power supply control device 10 is respectively electrically connected with the ultraviolet light emission source 2, the ultraviolet detector 3, the amplifier 11 and the analog-to-digital converter 12, the ultraviolet detector 3 is electrically connected with the amplifier 11, and the amplifier 11 is electrically connected with the analog-to-digital converter 12; the detection process comprises the following steps:
s1, outputting an electric pulse with the pulse width of 1000ns and the pulse repetition frequency of 5KHz by a power supply control device 10 to enable an ultraviolet light emission source 2 to emit deep ultraviolet laser;
s2, exciting the deep ultraviolet laser to generate a fluorescent signal after the deep ultraviolet laser is reacted with the quartz tube 4 through a light condensing system;
s3, transmitting the fluorescent signal to an ultraviolet detector 3 to generate a fluorescent photoelectric signal;
and S4, the fluorescent photoelectric signal is amplified by the amplifier 11 and then transmitted to the analog-to-digital converter 12, and the fluorescent photoelectric signal is converted into a digital signal by the analog-to-digital converter 12 and then output.
Example 4
The embodiment provides a sulfur dioxide detection method, which includes a sulfur dioxide detection device for detecting sulfur dioxide, where the sulfur dioxide detection device has the same structure as the detection device of embodiment 1, and specifically includes a power supply control device 10, an amplifier 11, an analog-to-digital converter 12, an ultraviolet light emission source 2, a reaction chamber 1, and an ultraviolet detector 3; the ultraviolet light emission source 2 is a semiconductor laser generator; a light gathering system and a quartz tube 4 are arranged in the reaction chamber 1; the power supply control device 10 is respectively electrically connected with the ultraviolet light emission source 2, the ultraviolet detector 3, the amplifier 11 and the analog-to-digital converter 12, the ultraviolet detector 3 is electrically connected with the amplifier 11, and the amplifier 11 is electrically connected with the analog-to-digital converter 12; the detection process comprises the following steps:
s1, outputting electric pulse with pulse width of 2000ns and pulse repetition frequency of 10KHz by a power supply control device 10 to enable an ultraviolet light emission source 2 to emit deep ultraviolet laser;
s2, exciting the deep ultraviolet laser to generate a fluorescent signal after the deep ultraviolet laser is reacted with the quartz tube 4 through a light condensing system;
s3, transmitting the fluorescent signal to an ultraviolet detector 3 to generate a fluorescent photoelectric signal;
and S4, the fluorescent photoelectric signal is amplified by the amplifier 11 and then transmitted to the analog-to-digital converter 12, and the fluorescent photoelectric signal is converted into a digital signal by the analog-to-digital converter 12 and then output.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a sulfur dioxide detection device, includes reacting chamber, ultraviolet emission source and ultraviolet detector, its characterized in that: a light gathering system and a quartz tube are arranged in the reaction chamber, and the quartz tube is communicated with the external environment;
the ultraviolet light emission source is a semiconductor laser generator, and the light condensation system is used for converging deep ultraviolet laser emitted by the ultraviolet light emission source to the quartz tube to generate a fluorescent signal, converging the fluorescent signal and transmitting the converged fluorescent signal to the ultraviolet detector.
2. The sulfur dioxide detecting device according to claim 1, wherein: the light condensing system comprises a first light filter, a first focusing mirror, a concave mirror, a second focusing mirror and a second light filter; the first optical filter is arranged on the wall of the reaction chamber and is opposite to the ultraviolet light emission source; the first focusing mirror is opposite to the first optical filter and the quartz tube; the concave mirror and the second focusing mirror are symmetrically distributed on two sides of the quartz tube and are vertical to the incidence direction of the deep ultraviolet laser; the second optical filter is arranged on the wall of the reaction chamber and is opposite to the second focusing mirror; the second optical filter corresponds to the ultraviolet detector.
3. The sulfur dioxide detecting device according to claim 1, wherein: the semiconductor laser generator is an aluminum gallium nitride photodiode.
4. The sulfur dioxide detecting device according to claim 1, wherein: the ultraviolet detector is a gallium nitride ultraviolet avalanche diode detector.
5. The sulfur dioxide detecting device according to claim 2, wherein: the second focusing lens is a quartz focusing lens and is hemispherical.
6. The sulfur dioxide detecting device according to claim 2, wherein: the central wavelength of the first optical filter is 220nm, the bandwidth of the first optical filter is 10nm, and the central wavelength of the second optical filter is 340nm, and the bandwidth of the second optical filter is 80 nm.
7. The sulfur dioxide detecting device according to claim 1, wherein: the ultraviolet detector is electrically connected with the ultraviolet light emitting source, the amplifier is electrically connected with the ultraviolet detector, and the analog-to-digital converter is electrically connected with the amplifier.
8. The sulfur dioxide detecting device according to claim 7, wherein: the data transmission module is electrically connected with the analog-to-digital converter.
9. A sulfur dioxide detection method comprises a sulfur dioxide detection device, wherein the sulfur dioxide detection device comprises a power supply control device, an amplifier, an analog-to-digital converter, an ultraviolet light emission source, a reaction chamber and an ultraviolet detector; the ultraviolet light emitting source is a semiconductor laser generator; a light gathering system and a quartz tube are arranged in the reaction chamber; the power supply control device is respectively and electrically connected with the ultraviolet light emission source, the ultraviolet detector, the amplifier and the analog-to-digital converter, the ultraviolet detector is electrically connected with the amplifier, and the amplifier is electrically connected with the analog-to-digital converter; the method is characterized in that the detection process comprises the following steps:
s1, outputting electric pulses through the power supply control device to enable the ultraviolet light emission source to emit deep ultraviolet laser;
s2, exciting the deep ultraviolet laser to generate a fluorescent signal after the deep ultraviolet laser is reacted with the quartz tube through the light condensing system;
s3, transmitting the fluorescence signal to the ultraviolet detector to generate a fluorescence photoelectric signal;
and S4, the fluorescent photoelectric signal is amplified by the amplifier and then transmitted to the analog-to-digital converter, and the fluorescent photoelectric signal is converted into a digital signal by the analog-to-digital converter and then output.
10. The sulfur dioxide detection method according to claim 9, characterized in that: the light condensing system comprises a first light filter, a first focusing mirror, a concave mirror, a second focusing mirror and a second light filter, and the step of reacting the deep ultraviolet laser with the quartz tube through the light condensing system in the step S2 comprises the following steps:
s21, the deep ultraviolet laser is incident to the first focusing lens after being filtered by the first optical filter, and is transmitted to the quartz tube after being converged by the first focusing lens;
s22, reacting the deep ultraviolet laser with gas in the quartz tube to generate a fluorescent signal;
and S23, the fluorescent signal is reflected by the concave mirror and then transmitted to the second focusing mirror for further convergence, and the converged fluorescent signal is filtered by the second optical filter and then transmitted to the ultraviolet detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251392.0A CN112362625A (en) | 2020-11-09 | 2020-11-09 | Sulfur dioxide detection device and sulfur dioxide detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251392.0A CN112362625A (en) | 2020-11-09 | 2020-11-09 | Sulfur dioxide detection device and sulfur dioxide detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112362625A true CN112362625A (en) | 2021-02-12 |
Family
ID=74514375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011251392.0A Pending CN112362625A (en) | 2020-11-09 | 2020-11-09 | Sulfur dioxide detection device and sulfur dioxide detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112362625A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2377535Y (en) * | 1999-07-22 | 2000-05-10 | 中国石油化工集团公司 | UV vluorescent tester |
| CN105486879A (en) * | 2015-11-30 | 2016-04-13 | 钢研纳克检测技术有限公司 | Vertical-type tubular furnace infrared carbon sulfur analyzer |
| CN105738283A (en) * | 2014-12-25 | 2016-07-06 | 株式会社岛津制作所 | Optical analyzer |
| CN105758828A (en) * | 2014-12-16 | 2016-07-13 | 江苏新高科分析仪器有限公司 | Pulse-type ultraviolet fluorescent sulfur meter |
| CN205484022U (en) * | 2016-01-15 | 2016-08-17 | 武汉理工大学 | Gas leakage monitoring device |
| CN106783832A (en) * | 2016-12-19 | 2017-05-31 | 中蕊（武汉）光电科技有限公司 | A kind of new gallium nitride ultraviolet detector |
| CN207114434U (en) * | 2017-08-09 | 2018-03-16 | 北京怡孚和融科技有限公司 | A kind of sulfur dioxide gas detection means |
| CN109387592A (en) * | 2017-08-08 | 2019-02-26 | 中国科学院大连化学物理研究所 | A kind of fluorescence detector of integrated aflatoxin light derivatization device |
| CN110146475A (en) * | 2019-05-30 | 2019-08-20 | 四川中科微纳科技有限公司 | A kind of enhanced light Emitting Diode-Induced Fluorescence detection system of Capillary Electrophoresis and its detection method |
| CN110441278A (en) * | 2019-08-29 | 2019-11-12 | 北京卓立汉光仪器有限公司 | A kind of device and method making signal multiplication |
| CN111094916A (en) * | 2017-09-21 | 2020-05-01 | 贺利氏特种光源有限公司 | Broadband semiconductor ultraviolet light source for spectral analysis device |
| CN111308025A (en) * | 2020-04-20 | 2020-06-19 | 淄博青禾检测科技有限公司 | Wide-range nitric oxide sensor system |
| CN111864027A (en) * | 2019-10-11 | 2020-10-30 | 中国科学院宁波材料技术与工程研究所 | Ultraviolet LED high-counter electrode, ultraviolet LED and preparation method thereof |
-
2020
- 2020-11-09 CN CN202011251392.0A patent/CN112362625A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2377535Y (en) * | 1999-07-22 | 2000-05-10 | 中国石油化工集团公司 | UV vluorescent tester |
| CN105758828A (en) * | 2014-12-16 | 2016-07-13 | 江苏新高科分析仪器有限公司 | Pulse-type ultraviolet fluorescent sulfur meter |
| CN105738283A (en) * | 2014-12-25 | 2016-07-06 | 株式会社岛津制作所 | Optical analyzer |
| CN105486879A (en) * | 2015-11-30 | 2016-04-13 | 钢研纳克检测技术有限公司 | Vertical-type tubular furnace infrared carbon sulfur analyzer |
| CN205484022U (en) * | 2016-01-15 | 2016-08-17 | 武汉理工大学 | Gas leakage monitoring device |
| CN106783832A (en) * | 2016-12-19 | 2017-05-31 | 中蕊（武汉）光电科技有限公司 | A kind of new gallium nitride ultraviolet detector |
| CN109387592A (en) * | 2017-08-08 | 2019-02-26 | 中国科学院大连化学物理研究所 | A kind of fluorescence detector of integrated aflatoxin light derivatization device |
| CN207114434U (en) * | 2017-08-09 | 2018-03-16 | 北京怡孚和融科技有限公司 | A kind of sulfur dioxide gas detection means |
| CN111094916A (en) * | 2017-09-21 | 2020-05-01 | 贺利氏特种光源有限公司 | Broadband semiconductor ultraviolet light source for spectral analysis device |
| CN110146475A (en) * | 2019-05-30 | 2019-08-20 | 四川中科微纳科技有限公司 | A kind of enhanced light Emitting Diode-Induced Fluorescence detection system of Capillary Electrophoresis and its detection method |
| CN110441278A (en) * | 2019-08-29 | 2019-11-12 | 北京卓立汉光仪器有限公司 | A kind of device and method making signal multiplication |
| CN111864027A (en) * | 2019-10-11 | 2020-10-30 | 中国科学院宁波材料技术与工程研究所 | Ultraviolet LED high-counter electrode, ultraviolet LED and preparation method thereof |
| CN111308025A (en) * | 2020-04-20 | 2020-06-19 | 淄博青禾检测科技有限公司 | Wide-range nitric oxide sensor system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6430402B2 (en) | Small tunable laser spectrometer for trace gas detection | |
| EP3201583B1 (en) | Solid state broad band near-infrared light source | |
| EP2639570A2 (en) | Gas analyzer and optical unit for use therein | |
| CN101487786A (en) | Measurement sensor for inhalable dust concentration | |
| JP2009520205A5 (en) | ||
| JP2012501438A (en) | Spectrum analyzer suitable for spectrum analysis of low concentration gas | |
| CN104597011B (en) | Excitation light source drift correction device and XRF | |
| CN111562237A (en) | CO based on double-beam cavity enhanced spectroscopy technology2、N2O stable isotope simultaneous detection device and method | |
| Hodgkinson et al. | A low cost, optically efficient carbon dioxide sensor based on nondispersive infra-red (NDIR) measurement at 4.2 μm | |
| RU75885U1 (en) | OPTICAL GAS SENSOR BASED ON IMMERSION DIODE OPTOCARS | |
| CN107328739B (en) | Complete or collected works' accepted way of doing sth infrared gas sensor and its working method | |
| CN112362625A (en) | Sulfur dioxide detection device and sulfur dioxide detection method | |
| CN201177598Y (en) | Gas detection device | |
| KR100602721B1 (en) | Wireless telecommunication terminal and method for measuring the distance | |
| CN105246190A (en) | Standard light source and chemiluminescence immunity analyzer using standard light source | |
| CN201637668U (en) | Eigen safe optoacoustic spectrum gas monitoring system based on optical acoustic sensor | |
| JP4611562B2 (en) | Luminescent reaction measuring device | |
| KR100737170B1 (en) | Portable quantum dot flurescent detector | |
| US10345226B1 (en) | Spectrum adjuster and producing a pure analyte spectrum | |
| CN114235699A (en) | Trace gas concentration detection device | |
| CN201611335U (en) | Underwater fluorescent detector for yellow substances | |
| US20210231496A1 (en) | Light Emitting Structure, Photo-Acoustic Spectroscopy Sensing Device, Method | |
| CN220690803U (en) | Light path structure applied to in-vitro diagnostic equipment | |
| CN217359610U (en) | High-performance optical fiber fluorescence detector | |
| CN216550437U (en) | Real-time fluorescent quantitative PCR device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |