CN218412261U - Hydrogen sulfide gas detection device based on ultraviolet dual-wavelength correlation spectroscopy - Google Patents
Hydrogen sulfide gas detection device based on ultraviolet dual-wavelength correlation spectroscopy Download PDFInfo
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- CN218412261U CN218412261U CN202221546030.9U CN202221546030U CN218412261U CN 218412261 U CN218412261 U CN 218412261U CN 202221546030 U CN202221546030 U CN 202221546030U CN 218412261 U CN218412261 U CN 218412261U
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- 239000007789 gas Substances 0.000 title claims abstract description 134
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 84
- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 238000005100 correlation spectroscopy Methods 0.000 title claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 83
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 abstract description 16
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 description 14
- 230000009977 dual effect Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 238000011088 calibration curve Methods 0.000 description 4
- 238000011897 real-time detection Methods 0.000 description 4
- 238000010183 spectrum analysis Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 3
- 238000004611 spectroscopical analysis Methods 0.000 description 3
- 238000012549 training Methods 0.000 description 3
- 238000002211 ultraviolet spectrum Methods 0.000 description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910052805 deuterium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
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Abstract
A hydrogen sulfide gas detection device based on an ultraviolet dual-wavelength correlation spectroscopy relates to the field of detection of hydrogen sulfide gas concentration. The problem of prior art when detecting hydrogen sulfide gas, when the light source fluctuation, lead to the hydrogen sulfide gas concentration that detects to produce great deviation than the true value is solved. In the hydrogen sulfide gas detection device of the present invention, the light source optical path outputs parallel light beams and emits the parallel light beams into the gas to be detected, and the parallel light beams passing through the gas to be detected are emitted to the optical signal processing optical path as detection light; the parallel light beams are ultraviolet rays; the optical signalThe processing light path converts incident light into two pulse light beams, and two wave bands lambda are obtained by filtering the two pulse light beams respectively 1 And λ 2 The optical signals of the two wavelength bands are sent to the photoelectric conversion part. The method is suitable for the technical field of detection of the concentration of the hydrogen sulfide gas on site.
Description
Technical Field
The utility model relates to a detection area of gas concentration, in particular to detection area of hydrogen sulfide gas concentration.
Background
In the prior art, when a hydrogen sulfide gas is detected by using a spectral analysis method, firstly, the requirement on a light source is high, when the light source fluctuates, the received light intensity changes, and then the optical parameter value is influenced, so that the hydrogen sulfide gas concentration obtained by using the relation between the optical parameter and the gas concentration generates larger deviation than a real value. When the conventional ultraviolet spectrum absorption method is used for detecting the concentration of the hydrogen sulfide gas, the incident spectrum of the hydrogen sulfide gas needs to be acquired, the operation is complex, and detection personnel are required to have certain knowledge storage and receive certain training. One of the reasons that limits the development of spectroscopy in gas detection is that the detection cost is too high, and the optical method for detecting hydrogen sulfide gas requires a spectrometer, which is expensive, thus severely limiting the application of the optical method in the field of hydrogen sulfide gas detection.
In summary, the existing technology for detecting hydrogen sulfide gas by using a spectroscopic analysis method has high requirements on light sources, the fluctuation of the light sources can cause the deviation of the concentration of the detected hydrogen sulfide gas from the true value, the operation is complex, detection personnel need to have certain knowledge and skill reserve, and the detection cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hydrogen sulfide gas detection device based on ultraviolet dual wavelength correlation spectroscopy, when solving prior art and detecting hydrogen sulfide gas body, undulant as the light source, the hydrogen sulfide gas body concentration that leads to detecting produces great deviation than true value. The utility model discloses simplify operating procedure, reduced the use of expensive instrument spectrum appearance, made the operation simpler, the cost is lower.
In order to achieve the above object, the present invention provides the following:
a hydrogen sulfide gas concentration detection device based on ultraviolet dual-wavelength correlation spectroscopy comprises a detection light path and a photoelectric conversion component;
the detection optical path comprises a light source optical path and a light signal processing optical path;
the light source optical path outputs parallel light beams, the parallel light beams are emitted into the gas to be detected, and the parallel light beams passing through the gas to be detected are used as detection light to be emitted to the optical signal processing optical path; the parallel light beams are ultraviolet rays;
the optical signal processing optical path comprises a second lens 4 and a beam splitting device, wherein the second lens 4 focuses incident detection light and then emits the detection light into the beam splitting device, the beam splitting device converts the incident light into two pulse light beams, and the two pulse light beams are filtered to obtain two wave bands lambda respectively 1 And λ 2 The optical signals of the two wave bands are sent to the photoelectric conversion component;
the photoelectric conversion component converts the received optical signal into an electric signal and outputs the electric signal, wherein the electric signal is a detection result.
Further, there is a preferred embodiment that the two bands λ 1 And λ 2 Satisfy the requirements of
Further, in a preferred embodiment, the detection apparatus further includes a gas cell, the gas cell is provided with an inlet and an outlet for the optical signal, and the gas cell is connected in series between the light source optical path and the optical signal processing optical path.
Further, in a preferred embodiment, a plurality of mirrors are disposed in the gas cell, and the mirrors are used for increasing the optical path of the parallel light beams inside the gas cell.
Further, in a preferred embodiment, the detection device further includes an air pump, and the air pump is used for collecting the gas to be detected into the gas pool.
Further, in a preferred embodiment, the beam splitting apparatus includes a pulse light splitting structure and two filters (6, 8), the pulse light splitting structure converts an incident light beam into two pulse light beams, the two pulse light beams have the same frequency and opposite phases, and the two pulse light beams are respectively filtered by one filter and then sent to the photoelectric conversion component.
Further, according to a preferred embodiment, the pulsed light dividing structure includes a driving device, a rotating mirror 5 and a reflecting mirror 9, the rotating mirror 5 is disc-shaped, an even number of sector areas are uniformly arranged on the mirror surface along the circumference, the sector areas include reflecting areas and transmitting areas, the transmitting areas and the reflecting areas are arranged alternately, incident light of the pulsed light dividing structure is incident into the sector areas, the driving device is used for driving the rotating mirror to rotate at a constant speed, light reflected by the reflecting areas is incident into one filter after being reflected by the reflecting mirror 9, and light projected by the projecting areas is incident into the other filter.
Further, there is still a preferred embodiment, above-mentioned pulsed light segmentation structure includes drive arrangement, swing mirror, speculum 9, drive arrangement drive swing mirror is at the uniform velocity swing, and swing mirror is penetrated to pulsed light segmentation structure's incident light, and the process swing mirror reflection light incides to in a light filter after 9 reflection of speculum, and the light that does not swing the mirror reflection incides to in another light filter.
Technical effects
A hydrogen sulfide gas body detection device based on ultraviolet dual wavelength correlation spectroscopy, simplified operating procedure, solved when the light source is undulant, leaded to the hydrogen sulfide gas body concentration that detects to have the problem of great deviation than the true value.
A hydrogen sulfide gas body detection device based on ultraviolet dual wavelength correlation spectroscopy utilize ultraviolet photoelectric detector to replace the spectrum appearance of high price, reduce the detection cost.
The device yields several advantages over the prior art as follows:
1. in the prior art, when detecting hydrogen sulfide gas content in gas, all realize detecting through chemical sensor, to adopting the technique that optical principle detected hydrogen sulfide gas content, all in the laboratory, because when adopting optical principle to detect hydrogen sulfide gas, must use the spectrum appearance, and the spectrum appearance is expensive, bulky, detects with high costs, and can't realize the witnessed inspections. A hydrogen sulfide gas detection device based on ultraviolet dual wavelength correlation spectroscopy, utilize ultraviolet photoelectric detector to replace the spectrum appearance of high price, can reach the purpose that detects hydrogen sulfide gas equally, simultaneously, ultraviolet photoelectric detector compares in the spectrum appearance price lower, has reduced the detection cost, and small, easy miniaturization, be fit for the witnessed inspections.
2. In the prior art, when the hydrogen sulfide gas is detected by using a spectral analysis method, the requirement on a light source is higher, and when the light source fluctuates, the detected hydrogen sulfide gas concentration has larger deviation than the true value, which is also an important reason that the technology for detecting the hydrogen sulfide gas by adopting an optical technology in the prior art is less, namely: due to the existence of the defect, and no effective solution is available, the technical personnel in the field almost abandon the research on the technology for detecting the concentration of the hydrogen sulfide gas by adopting an optical technology. The utility model discloses a realize hydrogen sulfide gas body and detect based on ultraviolet dual wavelength correlation spectrum method, and then overcome the undulant influence of light source completely, realized the detection of hydrogen sulfide gas body concentration.
3. In the prior art, when the concentration of the hydrogen sulfide gas is detected by using a conventional ultraviolet spectrum absorption method, the incident spectrum of the hydrogen sulfide gas needs to be acquired firstly, the operation is complex, and detection personnel are required to have certain knowledge storage and receive certain training. A hydrogen sulfide gas body detection device based on ultraviolet dual wavelength correlation spectroscopy, need not acquire the incident spectrum, just can realize detecting hydrogen sulfide gas body concentration, simplified the operating procedure, and reduced the demand of measurement personnel professional ability.
The utility model discloses be suitable for gas strength detection technical field, be particularly useful for the detection of on-the-spot hydrogen sulfide gas body concentration.
Drawings
Fig. 1 is a system diagram of a hydrogen sulfide gas detection apparatus based on ultraviolet two-wavelength correlation spectroscopy according to the first embodiment, the third embodiment, the sixth embodiment, and the seventh embodiment.
Fig. 2 is a system diagram of another structure of a beam splitting device in a hydrogen sulfide gas detection apparatus based on ultraviolet dual wavelength correlation spectroscopy according to an eighth embodiment.
Fig. 3 is a calibration curve of the hydrogen sulfide gas concentration and the optical parameter value according to the ninth embodiment.
Fig. 4 is an online real-time detection curve of the hydrogen sulfide gas concentration according to the ninth embodiment.
Wherein 1 is a light source, 2 is a first lens, 3 is a gas cell, 4 is a second lens, 5 is a beam splitting device, 6 is a filter 1,7 is an ultraviolet photodetector, and 8-filter 2,9 is a reflector.
Detailed Description
Referring to fig. 1, the embodiment is described, and the hydrogen sulfide gas detection device based on ultraviolet dual-wavelength correlation spectroscopy according to the embodiment includes a detection optical path and a photoelectric conversion component; the detection optical path comprises an optical source optical path and an optical signal processing optical path;
the light source optical path outputs parallel light beams, the parallel light beams are emitted into the gas to be detected, and the parallel light beams passing through the gas to be detected are used as detection light to be emitted to the optical signal processing optical path; the parallel light beams are ultraviolet rays;
the optical signalThe processing light path comprises a second lens 4 and a beam splitting device, the second lens 4 focuses incident detection light and then emits the detection light into the beam splitting device, the beam splitting device converts the incident light into two pulse beams, and two wave bands lambda obtained by filtering the two pulse beams are filtered from the two pulse beams respectively 1 And λ 2 The optical signals of the two wave bands are sent to the photoelectric conversion component;
the photoelectric conversion component converts the received optical signal into an electric signal and outputs the electric signal, wherein the electric signal is a detection result.
In practical application, the photoelectric conversion component is set as an ultraviolet photoelectric detector, and the ultraviolet photoelectric detector is a photomultiplier tube. In practical application, a deuterium lamp or a hydrogen lamp can be selected as a lamp source to emit ultraviolet rays, and the hydrogen lamp and the deuterium lamp have good effects in an ultraviolet region, moderate price and low cost.
In the prior art, when detecting the content of hydrogen sulfide gas in gas, the detection is realized through a chemical sensor, and the technology for detecting the content of hydrogen sulfide gas by adopting an optical principle is in a laboratory. This embodiment a hydrogen sulfide gas detection device based on ultraviolet dual wavelength correlation spectroscopy utilize ultraviolet photoelectric detector to replace the expensive spectrum appearance, can reach the purpose that detects hydrogen sulfide gas equally, simultaneously, ultraviolet photoelectric detector compares in the spectrum appearance price lower, has reduced the detection cost, and small, easy miniaturization, is fit for the witnessed inspections.
In the prior art, when the hydrogen sulfide gas is detected by using a spectral analysis method, the requirement on a light source is higher, and when the light source fluctuates, the detected hydrogen sulfide gas concentration has larger deviation than the true value, which is also an important reason that the technology for detecting the hydrogen sulfide gas by adopting an optical technology in the prior art is less, namely: due to the existence of this drawback, and no effective solution has been available, those skilled in the art have given up almost no research on the technique for detecting the concentration of hydrogen sulfide gas by optical techniques. The embodiment is based on ultraviolet dual-wavelength correlation spectroscopy to realize the detection of the hydrogen sulfide gas, thereby completely overcoming the influence of light source fluctuation and realizing the detection of the concentration of the hydrogen sulfide gas.
In the prior art, when the concentration of the hydrogen sulfide gas is detected by using a conventional ultraviolet spectrum absorption method, an incident spectrum of the hydrogen sulfide gas needs to be acquired firstly, the operation is complex, and detection personnel are required to have certain knowledge storage and receive certain training. By adopting the hydrogen sulfide gas detection device based on the ultraviolet dual-wavelength correlation spectroscopy, the concentration of the hydrogen sulfide gas can be detected without acquiring an incident spectrum, the operation steps are simplified, and the requirement of professional ability of detection personnel is reduced.
In the second embodiment, the two wavelength bands λ in the hydrogen sulfide gas detection device based on ultraviolet two-wavelength correlation spectroscopy described in the first embodiment are used 1 And λ 2 Specifically defined, two bands λ 1 And λ 2 Satisfy the requirement of
In practical applications, according to beer-lambert law: lnI (λ) = lnI 0 (λ)-σ(λ)NL (5)
When two different bands of the same transmission spectrum are selected:
ln[I(λ 1 )]＝ln[I 0 (λ 1 )]-σ(λ 1 )NL (6)
ln[I(λ 2 )]＝ln[I 0 (λ 2 )]-σ(λ 2 )NL
when the luminous intensity of the light source fluctuates:
two bands are selected to satisfy the condition:
this embodiment provides a preferred embodiment, band λ 1 Selecting 210 + -5 nm and band lambda 2 250. + -.5 nm was chosen.
In the prior art, when the hydrogen sulfide gas is detected by using a spectral analysis method, the requirement on a light source is higher, and when the light source fluctuates, the concentration of the detected hydrogen sulfide gas has larger deviation than the true value. By adopting the device for detecting the concentration of the hydrogen sulfide gas based on the ultraviolet dual-wavelength correlation spectroscopy, the concentration of the hydrogen sulfide gas can be detected without being influenced by light source fluctuation, and the detected concentration of the hydrogen sulfide gas does not deviate from a true value.
The third embodiment is described with reference to fig. 1, and the present embodiment adds a gas cell to the hydrogen sulfide gas detection apparatus based on ultraviolet dual-wavelength correlation spectroscopy according to the first embodiment, the gas cell is provided with an inlet and an outlet of an optical signal, and the gas cell is connected in series between a light source optical path and an optical signal processing optical path.
This embodiment has increased the gas cell for collect treat the gas that detects, convenient detection.
The gas cell can adopt a closed, semi-closed or completely open structure, and the gas is circulated by a gas pump.
In the present embodiment, the gas cell in the hydrogen sulfide gas detection apparatus based on ultraviolet dual wavelength correlation spectroscopy according to the third embodiment is specifically limited, and a plurality of mirrors for increasing the optical length of the parallel light beam inside the gas cell are arranged in the gas cell.
In practical application, a plurality of reflectors are arranged in the gas cell and used for increasing the optical path of the parallel light beams in the gas cell, and under the condition, the optical path can be ensured to be as long as possible on the premise of reducing the mention of the gas cell as much as possible, so that the optical signal has sufficient contact time with the gas to be detected. The gas pool is small in size, and the design of a portable product can be achieved.
In the fifth embodiment, an air pump is added to the detection device in the hydrogen sulfide gas detection device based on ultraviolet dual-wavelength correlation spectroscopy, and the air pump is used for collecting the gas to be detected into the gas pool.
This embodiment has increased the air pump, has realized that active control will wait to detect gas introduction gas pond in, improves the timeliness and the detection efficiency who detects.
The sixth embodiment is described with reference to fig. 1, and the present embodiment specifically describes a beam splitting apparatus in a hydrogen sulfide gas detection apparatus based on ultraviolet dual-wavelength correlation spectroscopy according to the first embodiment, where the beam splitting apparatus includes a pulsed light splitting structure and two filters (6, 8), the pulsed light splitting structure converts an incident light beam into two pulsed light beams, the two pulsed light beams have the same frequency and opposite phases, and the two pulsed light beams are respectively filtered by one filter and then sent to a photoelectric conversion component.
The two optical filters (6, 8) are respectively used for filtering the optical signals to obtain a wave band lambda 1 And λ 2 The optical signal of (1).
The pulse light splitting structure converts incident light beams into two pulse light beams, then carries out filtering processing respectively to obtain optical signals of two wave bands, namely, optical signals of two wave bands in the detection light beams are extracted at the same time, and the optical signals of the two wave bands are converted into two voltage signals V through a photoelectric conversion device 1 And V 2 。
The seventh embodiment will be described with reference to fig. 1, which is a specific description of a pulsed light splitting structure in a hydrogen sulfide gas detection device based on ultraviolet two-wavelength correlation spectroscopy according to the sixth embodiment, where the pulsed light splitting structure includes a driving device, a rotating mirror 5 and a reflecting mirror 9, the rotating mirror 5 is a circular disk, an even number of sector areas are uniformly arranged on the mirror surface along the circumference, the sector areas have reflecting areas and transmitting areas, the transmitting areas and the reflecting areas are arranged alternately, incident light of the pulsed light splitting structure is incident into the sector areas, the driving device is configured to drive the rotating mirror to rotate at a constant speed, light reflected by the reflecting areas is incident into one filter after being reflected by the reflecting mirror 9, and light projected by the projecting areas is incident into the other filter.
In the pulse light splitting structure in the present embodiment, the light beam is split into two parts by the rotating mirror 5 and the reflecting mirror 9, and the principle is as follows: by designing the rotating mirror 5 into the structure shown in fig. 1, the reflective area and the transmissive area are arranged at intervals, so that the incident optical signal is transmitted and reflected during the rotation of the rotating mirror 5, and the light beam is divided into two parts.
An eighth embodiment will be described with reference to fig. 2, which is another example of the pulsed light splitting structure in the hydrogen sulfide gas detection apparatus based on ultraviolet two-wavelength-related spectroscopy according to the sixth embodiment, where the pulsed light splitting structure includes a driving device, a swinging mirror, and a reflecting mirror 9, the driving device drives the swinging mirror to swing at a constant speed, incident light of the pulsed light splitting structure enters the swinging mirror, light reflected by the swinging mirror is reflected by the reflecting mirror 9 and then enters one optical filter, and light not reflected by the swinging mirror enters another optical filter.
In practical application, the pulse dividing structure may be arranged as another structure, and as shown in fig. 3, a suitable pulse dividing structure is selected according to actual use conditions in the field.
The ninth embodiment is described with reference to fig. 3 and 4, and the first embodiment adopts the hydrogen sulfide gas detection apparatus based on ultraviolet dual-wavelength correlation spectroscopy to perform a test experiment, and the present embodiment uses a LabVIEW platform to program a real-time hydrogen sulfide gas detection system, which can realize the functions of processing acquired signal data, displaying optical parameter values, inputting calibration curves, displaying hydrogen sulfide gas concentration on line in real time, storing data files, and the like. By adopting the device for detecting the concentration of hydrogen sulfide gas based on the ultraviolet dual-wavelength correlation spectroscopy, which is described in the first embodiment, on the basis of a real-time detection system of hydrogen sulfide gas, a calibration curve of the concentration of hydrogen sulfide gas and an optical parameter value is obtained, as shown in fig. 3, and simultaneously, an online real-time detection curve of the concentration of hydrogen sulfide gas is obtained by using the calibration curve of the concentration of hydrogen sulfide gas and the optical parameter value obtained by measurement and the real-time detection system of hydrogen sulfide gas, as shown in fig. 4.
The above description is only an example of the present invention, and is not limited to the present invention, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principles of the present invention. Are intended to be included within the scope of the claims of the present invention.
Claims (8)
1. A hydrogen sulfide gas detection device based on ultraviolet dual-wavelength correlation spectroscopy is characterized by comprising a detection light path and a photoelectric conversion component;
the detection optical path comprises an optical source optical path and an optical signal processing optical path;
the light source optical path outputs parallel light beams, the parallel light beams are emitted into the gas to be detected, and the parallel light beams passing through the gas to be detected are used as detection light to be emitted to the optical signal processing optical path; the parallel light beams are ultraviolet rays;
the optical signal processing optical path comprises a second lens (4) and a beam splitting device, wherein the second lens (4) focuses incident detection light and then emits the detection light into the beam splitting device, the beam splitting device converts the incident light into two pulse beams, and the two pulse beams are filtered to obtain two wave bands lambda respectively 1 And λ 2 The optical signals of the two wave bands are sent to the photoelectric conversion component;
the photoelectric conversion component converts the received optical signal into an electric signal and outputs the electric signal, wherein the electric signal is a detection result.
2. The apparatus according to claim 1, wherein the two wave bands λ are different from each other 1 And λ 2 The relationship of (1) is:
3. the apparatus of claim 1, further comprising a gas cell, wherein the gas cell is provided with an inlet and an outlet for optical signals, and the gas cell is connected in series between the light source optical path and the optical signal processing optical path.
4. The apparatus according to claim 3, wherein a plurality of reflectors are disposed in the gas cell, and the reflectors are used for increasing the optical path length of the parallel light beams inside the gas cell.
5. The apparatus according to claim 1, further comprising a gas pump for collecting the gas to be detected into the gas cell.
6. The apparatus for detecting hydrogen sulfide gas based on ultraviolet dual-wavelength correlation spectroscopy according to claim 1, wherein the beam splitting apparatus includes a pulse light splitting structure, two filters (6, 8), and the pulse light splitting structure converts an incident light beam into two pulse light beams, and the two pulse light beams have the same frequency and opposite phases, and are respectively transmitted to the photoelectric conversion component after being filtered by one filter.
7. The device for detecting the hydrogen sulfide gas based on the ultraviolet dual-wavelength correlation spectroscopy according to claim 6, wherein the pulsed light splitting structure comprises a driving device, a rotating mirror (5) and a reflecting mirror (9), the rotating mirror (5) is disc-shaped, an even number of sector areas are uniformly arranged on a mirror surface along a circumference, the sector areas have reflecting areas and transmitting areas, the transmitting areas and the reflecting areas are arranged at intervals, incident light of the pulsed light splitting structure is incident into the sector areas, the driving device is used for driving the rotating mirror to rotate at a constant speed, light reflected by the reflecting areas is incident into one filter after being reflected by the reflecting mirror (9), and light projected by the transmitting areas is incident into the other filter.
8. The device for detecting hydrogen sulfide gas based on ultraviolet dual-wavelength correlation spectroscopy according to claim 6, wherein the pulsed light splitting structure includes a driving device, a swinging mirror, and a reflecting mirror (9), the driving device drives the swinging mirror to swing at a constant speed, incident light of the pulsed light splitting structure enters the swinging mirror, light reflected by the swinging mirror is reflected by the reflecting mirror (9) and then enters one of the optical filters, and light not reflected by the swinging mirror enters the other optical filter.
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