CN209296567U - A kind of gas-detecting device based on integrating sphere multiple reflections - Google Patents
A kind of gas-detecting device based on integrating sphere multiple reflections Download PDFInfo
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- CN209296567U CN209296567U CN201822046551.8U CN201822046551U CN209296567U CN 209296567 U CN209296567 U CN 209296567U CN 201822046551 U CN201822046551 U CN 201822046551U CN 209296567 U CN209296567 U CN 209296567U
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- integrating sphere
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- detecting device
- multiple reflections
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Abstract
The utility model discloses a kind of gas-detecting devices based on integrating sphere multiple reflections, including integrating sphere, light-entering optical fiber, photodetector and transparent gas chamber, integrating sphere includes the first hemisphere and the second hemisphere, first hemisphere is equipped with the first gas outlet, light inlet and light-emitting window, it is equipped with the first lens at light inlet, is equipped with the second lens at light-emitting window；Second hemisphere is equipped with the first air inlet；Light-entering optical fiber one end is connected with the first lens, and the other end is connected with light source；Photodetector is set to the outside of integrating sphere, and light inputting end is connected with the light-emitting window on integrating sphere；Transparent gas chamber is set in integrating sphere, and transparent gas chamber is equipped with the second air inlet and the second gas outlet, and the second air inlet is connected to the first air inlet on integrating sphere；Second gas outlet is connected to the first gas outlet on integrating sphere.The utility model can prevent integrating sphere from being corroded by gaseous contamination.
Description
Technical field
The utility model belongs to gas analysis technology field, and in particular to a kind of gas inspection based on integrating sphere multiple reflections
Survey device.
Background technique
When getting to the light of continuous wavelength on certain gas, gas can absorb the light of some specific wavelengths, to weaken
This light beam is extended to the absorption spectrum for being spectrally formed this substance by the intensity of light beam.It is fixed based on Lambert-Beer
Rule, can use the concentration for going out gas through the light intensity attenuation degree direct inversion after gas.Light source passes through the light of tested gas
Cheng Yuechang, surveyed gas concentration data are more accurate.Traditional multiple reflections long light path gas absorption cell mainly has Maurice Herriott pond
With White pond.The coaxial cavity resonator structure that Maurice Herriott pond is made of two pieces of identical spherical eyeglasses, light beam is from one of mirror
The aperture of on piece enters, and after specific roundtrip, is emitted from identical aperture, between adjusting between eyeglass
From,
Different hot spot distributions can be realized on eyeglass, obtain different light paths.White pond includes two pieces of semicircle object lens
With the closely confocal arrangement of third block field lens, light beam enters from the side of field lens, is emitted from other side, by changing cutting tiltedly for object lens
Angle may be implemented different hot spot distributions, obtain different light paths.Both gas absorption cells have been used widely,
But the two has that face type machining accuracy is higher and cost is more expensive, simultaneously as the two be directly with
Tested gas contact, if being surveyed gas attack pollution, integral replacing is needed, to cause the increase of application cost.
Utility model content
In view of the above-mentioned problems, the utility model proposes a kind of gas-detecting device based on integrating sphere multiple reflections, light
It is actually taken up by gas after integrating sphere multiple reflection inside by gas chamber, is stored in gas chamber since gas is independently of integrating sphere
, thus can prevent integrating sphere from being corroded by gaseous contamination, reduce application cost.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the utility model is achieved through the following technical solutions:
A kind of gas-detecting device based on integrating sphere multiple reflections, comprising:
Integrating sphere, the integrating sphere include the first hemisphere and the second hemisphere being oppositely arranged, and first hemisphere is equipped with
First gas outlet, light inlet and light-emitting window are equipped with the first lens at the light inlet, are equipped with the second lens at the light-emitting window；
Second hemisphere is equipped with the first air inlet；
Light-entering optical fiber, described light-entering optical fiber one end are set at the light inlet on first hemisphere, and thoroughly with described first
Mirror is connected, and the other end is connected with light source；
Photodetector, the photodetector is on the outside of the integrating sphere, light inputting end and the integrating sphere
Light-emitting window be connected；
Transparent gas chamber, the transparent gas chamber are set in the integrating sphere, and the transparent gas chamber is equipped with the second air inlet
With the second gas outlet, second air inlet is connected to the first air inlet on the integrating sphere；Second gas outlet and institute
State the first gas outlet connection on integrating sphere.
Preferably, the gas-detecting device based on integrating sphere multiple reflections further includes heater strip, the heater strip around
On the outer wall of the transparent gas chamber, for being heated to the indoor tested gas of transparent gas；The both ends of the heater strip
Respectively by integrating sphere the first air inlet and the first gas outlet come out after be connected with power supply circuit.
Preferably, the transparent gas chamber is in the thin shape in intermediate thick both ends.
Preferably, the middle part of the transparent gas chamber is in spherical, and both ends in a tubular form, are used separately as the second of transparent gas chamber
Air inlet and the second gas outlet.
Preferably, the gas-detecting device based on integrating sphere multiple reflections further includes that the first fixing piece and second are fixed
Part, first fixing piece and the second fixing piece are respectively arranged at the first air inlet and the first gas outlet of the integrating sphere, and
It is connected respectively with the both ends of the transparent gas chamber, for fixing the transparent gas chamber.
Preferably, the both ends of the transparent gas chamber extend respectively to the outside of integrating sphere, connect at second air inlet
There is air intake valve, is connected with outlet valve at second gas outlet.
Preferably, the gas-detecting device based on integrating sphere multiple reflections further includes that third fixing piece and the 4th are fixed
Part, the third fixing piece and the 4th fixing piece are respectively arranged at the light inlet and light-emitting window of the integrating sphere, are respectively used to solid
The fixed light-entering optical fiber and photodetector.
Preferably, the transparent gas chamber is made of quartz glass；The inner wall of the integrating sphere is coated with diffuse-reflective material.
Preferably, the light inlet on the integrating sphere and light-emitting window are located at the two sides of first gas outlet.
It preferably, is welding between the light-entering optical fiber and the first lens；First lens and the second lens are poly-
Optical lens.
Compared with prior art, the utility model has the beneficial effects that
The utility model proposes a kind of gas-detecting device based on integrating sphere multiple reflections, light is more inside integrating sphere
It is actually taken up by gas after secondary reflection by gas chamber, is stored in gas chamber since gas is independently of integrating sphere, thus can prevent
Integrating sphere is corroded by gaseous contamination, reduces application cost.
Further, the light source of the utility model enters integrating sphere after light-entering optical fiber, the first lens, inside integrating sphere
Multiple reflections repeatedly pass through transparent gas chamber, so that increasing gas absorbs light path, the light intensity being finally received by a photoelectric detector is
Light intensity after absorbing by integrating sphere multiple reflection inside and the indoor gas of transparent gas, calibrates available light by standard gas
Correlativity between electric explorer part received signal strength and gas concentration.Standard gas calibrating method is to select several known concentrations
Gas standard specimen, the signal strength that record detects after the gas-detecting device based on integrating sphere multiple reflections, using intending
Conjunction method finds the numerical relation between gas concentration and signal strength, and known concentration gas standard specimen is selected to be verified.
Detailed description of the invention
Fig. 1 is a kind of overall structure of the gas-detecting device based on integrating sphere multiple reflections of embodiment of the utility model
Schematic diagram；
1. the first gas outlet, 2. first hemisphere, 3. first lens, 4. heater strips, 5. second hemisphere, 6. first air inlets,
7. photodetector, 8. second lens, 9. transparent gas chambers.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain that this is practical
It is novel, it is not used to limit the utility model.
The application principle of the utility model is explained in detail with reference to the accompanying drawing.
Since gas-detecting device in the prior art is higher there are face type machining accuracy and cost is more expensive asks
Topic, and be all it is direct contacted with tested gas, if surveyed gas attack pollute, integral replacing is needed, to cause to answer
With the increase of cost, for this purpose, the utility model provides a kind of gas-detecting device based on integrating sphere multiple reflections, light exists
It is actually taken up by gas after integrating sphere multiple reflection inside by gas chamber, is stored in gas chamber since gas is independently of integrating sphere,
It thus can prevent integrating sphere from being corroded by gaseous contamination, reduce application cost.
Embodiment 1
As shown in Figure 1, providing a kind of gas detection dress based on integrating sphere multiple reflections in the utility model embodiment
It sets, comprising:
Integrating sphere, the integrating sphere include the first hemisphere 2 and the second hemisphere 5 being oppositely arranged, and are set on first hemisphere 2
There are the first gas outlet 1, light inlet and light-emitting window, the first lens 3 are equipped at the light inlet, second is equipped at the light-emitting window thoroughly
Mirror 8；Second hemisphere 5 is equipped with the first air inlet 6；In the preferred embodiment of the utility model embodiment, the product
Diffuse-reflective material is coated on the inner wall of bulb separation, the diffuse-reflective material can be such as barium sulfate, polytetrafluoroethylene (PTFE)；Described
One lens 3 and the second lens 8 are collector lens, and the size of second lens 8 is greater than the size of first lens 3；Institute
State the two sides that light inlet and light-emitting window on integrating sphere are located at first gas outlet 1；
Light-entering optical fiber, described light-entering optical fiber one end are set at the light inlet on first hemisphere 2, and thoroughly with described first
Mirror 3 is connected, and the other end is connected with light source；In the preferred embodiment of the utility model embodiment, the light-entering optical fiber and
It is welding between one lens 3；The selection needs of the light source are selected according to the characteristic absorption wavelength of surveyed gas, this was selected
Journey is the prior art；Connection relationship and working principle between the light-entering optical fiber and light source are the prior art, the two
Directly to obtain from buying on the market, excessive repeat therefore, in the utility model is not done；
Photodetector 7, the photodetector 7 are set to the outside of the integrating sphere, light inputting end and the integrating sphere
On light-emitting window be connected；The photodetector 7 will match with the light source, the specific structure of the photodetector 7 and
Working principle is the prior art, can directly obtain from buying on the market, therefore, in the utility model not do excessive repeat；
Transparent gas chamber 9, the transparent gas chamber 9 are set in the integrating sphere, and the transparent gas chamber 9 is equipped with the second air inlet
Mouth and the second gas outlet, second air inlet is connected to the first air inlet 6 on the integrating sphere, for realizing to transparent gas
9 air inlet of room；Second gas outlet is connected to the first gas outlet on the integrating sphere, for realizing to the transparent gas chamber 9
Outlet；The transparent gas chamber 9 should be made of high light transmission, heat-resisting material, in the preferred implementation side of the utility model embodiment
In formula, the transparent gas chamber 9 is made of quartz glass；The transparent gas chamber 9 is in the thin shape in intermediate thick both ends；It is highly preferred that
In spherical, both ends in a tubular form, are used separately as the second air inlet and second of transparent gas chamber 9 at the middle part of the transparent gas chamber 9
Gas outlet.
Further, described transparent for the ease of fixation in a kind of specific embodiment of the utility model embodiment
Gas chamber 9 improves the stability of the utility model gas-detecting device, the gas-detecting device based on integrating sphere multiple reflections
It further include the first fixing piece and the second fixing piece, first fixing piece and the second fixing piece are respectively arranged on the of the integrating sphere
At one air inlet 6 and the first gas outlet 1, and it is connected respectively with the both ends of the transparent gas chamber 9.
Further, in a kind of specific embodiment of the utility model embodiment, in order to realize accurate air inlet and go out
Gas, the both ends of the transparent gas chamber 9 extend respectively to the outside of integrating sphere, be connected with air intake valve at second air inlet,
Outlet valve is connected at second gas outlet.
Further, in a kind of specific embodiment of the utility model embodiment, for the ease of entering light described in fixation
Optical fiber and photodetector 7, the gas-detecting device based on integrating sphere multiple reflections further include third fixing piece and the 4th
Fixing piece, the third fixing piece and the 4th fixing piece are respectively arranged at the light inlet and light-emitting window of the integrating sphere, use respectively
In the fixation light-entering optical fiber and photodetector 7.
In conclusion the work of the gas-detecting device based on integrating sphere multiple reflections in the utility model embodiment is former
Reason specifically:
(1) under test gas is passed through into transparent gas chamber 9；
(2) start light source, the light that the light source issues is described via entering after the light-entering optical fiber and the first lens 3
Bright gas chamber 9, light repeatedly passes through the transparent gas chamber 9 in integrating sphere after multiple reflections, by the under test gas in transparent gas chamber 9
It absorbs, is finally received via the second lens 8 by photodetector 7, available photodetector 7 is calibrated by standard gas and receives letter
Correlativity number between intensity and under test gas concentration, to complete gas detection.
Embodiment 2
The gas-detecting device based on integrating sphere multiple reflections further includes heater strip 4, and the heater strip 4 is set around institute
On the outer wall for stating transparent gas chamber 9, for being heated to the tested gas in transparent gas chamber 9, discharged with reaching with tested gas
The same temperature condition of pipeline；The first air inlet 6 and the first gas outlet on integrating sphere are passed through in the both ends of the heater strip 4 respectively
1 is connected with power supply circuit afterwards out.
In summary: the utility model proposes a kind of gas-detecting devices based on integrating sphere multiple reflections, and light is in product
It is actually taken up by gas after bulb separation multiple reflection inside by gas chamber, is stored in gas chamber since gas is independently of integrating sphere, because
And can prevent integrating sphere from being corroded by gaseous contamination, reduce application cost.
Further, the light source of the utility model enters integrating sphere after light-entering optical fiber, the first lens, inside integrating sphere
Multiple reflections repeatedly pass through transparent gas chamber, so that increasing gas absorbs light path, the light intensity being finally received by a photoelectric detector is
Light intensity after absorbing by integrating sphere multiple reflection inside and the indoor gas of transparent gas, calibrates available light by standard gas
Correlativity between electric explorer part received signal strength and gas concentration.The standard gas calibrating method is several known to select
The gas standard specimen of concentration records the signal strength detected after the gas-detecting device based on integrating sphere multiple reflections,
The numerical relation between gas concentration and signal strength is found using approximating method, and known concentration gas standard specimen is selected to be tested
Card.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (10)
1. a kind of gas-detecting device based on integrating sphere multiple reflections characterized by comprising
Integrating sphere, the integrating sphere include the first hemisphere and the second hemisphere being oppositely arranged, and first hemisphere is equipped with first
Gas outlet, light inlet and light-emitting window are equipped with the first lens at the light inlet, are equipped with the second lens at the light-emitting window；It is described
Second hemisphere is equipped with the first air inlet；
Light-entering optical fiber, described light-entering optical fiber one end be set to first hemisphere on light inlet at, and with the first lens phase
Even, the other end is connected with light source；
Photodetector, the photodetector are set to the outside of the integrating sphere, going out on light inputting end and the integrating sphere
Optical port is connected；
Transparent gas chamber, the transparent gas chamber are set in the integrating sphere, and the transparent gas chamber is equipped with the second air inlet and the
Two gas outlets, second air inlet are connected to the first air inlet on the integrating sphere；Second gas outlet and the product
The first gas outlet connection on bulb separation.
2. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 1, it is characterised in that: described
Gas-detecting device based on integrating sphere multiple reflections further includes heater strip, and the heater strip is set around the outer of the transparent gas chamber
On wall, for being heated to the indoor tested gas of transparent gas；On integrating sphere is passed through at the both ends of the heater strip respectively
One air inlet and the first gas outlet are connected after coming out with power supply circuit.
3. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 1, it is characterised in that: described
Transparent gas chamber is in the thin shape in intermediate thick both ends.
4. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 3, it is characterised in that: described
In spherical, both ends in a tubular form, are used separately as the second air inlet and the second gas outlet of transparent gas chamber at the middle part of transparent gas chamber.
5. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 4, it is characterised in that: described
Gas-detecting device based on integrating sphere multiple reflections further includes the first fixing piece and the second fixing piece, first fixing piece and
Second fixing piece is respectively arranged at the first air inlet and the first gas outlet of the integrating sphere, and respectively with the transparent gas chamber
Both ends are connected, for fixing the transparent gas chamber.
6. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 4, it is characterised in that: described
The both ends of transparent gas chamber extend respectively to the outside of integrating sphere, are connected with air intake valve at second air inlet, and described second
Outlet valve is connected at gas outlet.
7. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 1, it is characterised in that: described
Gas-detecting device based on integrating sphere multiple reflections further includes third fixing piece and the 4th fixing piece, the third fixing piece and
4th fixing piece is respectively arranged at the light inlet and light-emitting window of the integrating sphere, is respectively used to fix the light-entering optical fiber and photoelectricity
Detector.
8. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 1, it is characterised in that: described
Transparent gas chamber is made of quartz glass；The inner wall of the integrating sphere is coated with diffuse-reflective material.
9. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 1, it is characterised in that: described
Light inlet and light-emitting window on integrating sphere are located at the two sides of first gas outlet.
10. a kind of gas-detecting device based on integrating sphere multiple reflections according to claim 1, it is characterised in that: institute
It states between light-entering optical fiber and the first lens as welding；First lens and the second lens are collector lens.
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| CN201822046551.8U CN209296567U (en) | 2018-12-07 | 2018-12-07 | A kind of gas-detecting device based on integrating sphere multiple reflections |
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| CN201822046551.8U CN209296567U (en) | 2018-12-07 | 2018-12-07 | A kind of gas-detecting device based on integrating sphere multiple reflections |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406428A (en) * | 2018-12-07 | 2019-03-01 | 浙江大学昆山创新中心 | A kind of gas-detecting device based on integrating sphere multiple reflections |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406428A (en) * | 2018-12-07 | 2019-03-01 | 浙江大学昆山创新中心 | A kind of gas-detecting device based on integrating sphere multiple reflections |
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