CN215339500U - Three narrow band optical filter film gas detector - Google Patents
Three narrow band optical filter film gas detector Download PDFInfo
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- CN215339500U CN215339500U CN202121443094.1U CN202121443094U CN215339500U CN 215339500 U CN215339500 U CN 215339500U CN 202121443094 U CN202121443094 U CN 202121443094U CN 215339500 U CN215339500 U CN 215339500U
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- Prior art keywords
- shell
- housing
- optical filter
- infrared light
- gas detector
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 5
- 239000001110 calcium chloride Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 37
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 7
- 238000000746 purification Methods 0.000 description 7
- 239000004038 photonic crystal Substances 0.000 description 5
- 238000007791 dehumidification Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007735 ion beam assisted deposition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a gas detector for a three-narrow-band optical filter film layer, which comprises a shell, wherein an infrared light source and a housing are arranged in the shell, an opening is formed in the position, facing the infrared light source, of the housing, an optical filter is arranged on the opening, three narrow bands are arranged on the optical filter, an air inlet and an exhaust hole are formed in the housing, the outer side of the air inlet of the housing is connected with one end of a connecting pipe, the other end of the connecting pipe penetrates through the shell and is connected with an air outlet of an air pump, the outer side of the exhaust hole is connected with one end of an air outlet pipe, the other end of the air outlet pipe penetrates through and extends to the outer side of the shell, a motor is arranged in the inner cavity of the shell, a coaxial modulation disc is arranged on an output shaft of the motor, three groups of through holes which are arranged in an annular mode are formed in the modulation disc, and the infrared light source and the housing are positioned on two sides of the modulation disc; the optical filter film layer gas detector modulates the infrared light sources with three frequencies, realizes synchronous measurement of three gases through the infrared absorption characteristic of the gases, and has the advantages of simple operation and time saving.
Description
Technical Field
The utility model relates to the technical field of gas detection equipment, in particular to a gas detector with three narrow-band optical filter film layers.
Background
The infrared gas detection device utilizes the characteristic that different gases have selective absorption on infrared radiation energy with different wavelengths to analyze the gas concentration, and has the characteristics of wide range of measurement, high sensitivity, rapid reaction and strong selectivity. However, the existing infrared gas detection device can only detect one gas, and when two or more gases are detected, different optical filters need to be replaced or infrared gas detection devices with different gas detection functions need to be replaced, so that time is wasted, and the operation is complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, provides the three-narrow-band optical filter film layer gas detector, modulates the infrared light sources with three frequencies, realizes the synchronous measurement of the three gases through the infrared absorption characteristics of the gases, has simple operation and time saving, and can effectively solve the problems in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme: three narrowband optical filter rete gas detection appearance, which comprises a housin, be equipped with infrared light source and housing in the casing, the opening has been seted up towards infrared light source's position to the housing, install the light filter on the opening, be equipped with three narrowband on the light filter, air inlet and exhaust hole have been seted up on the housing, the outside of housing air inlet and the one end of connecting pipe are connected, the other end of connecting pipe runs through the casing and is connected with the gas outlet of air pump, the outside in exhaust hole and the one end of outlet duct are connected, the other end of outlet duct runs through and extends to the outside of casing.
The infrared light source and the cover shell are positioned on two sides of the modulation disc.
As a preferred technical scheme of the present invention, a control switch is disposed on an outer side of the housing, an input end of the control switch is electrically connected to an output end of an external power supply, and an output end of the control switch is electrically connected to an input end of the air pump and an input end of the motor, respectively.
As a preferable technical scheme of the present invention, the housing is a cylindrical housing, the infrared sensor is located at the bottom side of an inner cavity of the cylindrical housing, a conduit communicated with the inner cavity of the cylindrical housing is installed at a position on the outer peripheral side of the cylindrical housing away from the opening, the other end of the conduit penetrates and extends to the outer side of the housing, and the exhaust hole of the housing is located in the middle of the bottom side of the inner cavity of the housing.
As a preferable technical scheme of the utility model, one end of the guide pipe, which is positioned outside the shell, is provided with a valve.
As a preferable technical scheme of the utility model, a purification assembly is arranged between the air pump and the connecting pipe, the purification assembly comprises a shell, the shell is provided with an air inlet and an air outlet, the air inlet of the shell is connected with the air outlet of the air pump, the air outlet of the shell is connected with one end of the connecting pipe, which is positioned outside the shell, and a metal wire mesh layer, a calcium chloride dehumidification layer, a glass fiber filter paper layer and an active carbon adsorption layer are sequentially arranged in the shell along the air flowing direction.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the optical filter film layer gas detector disclosed by the utility model, the infrared light sources with three frequencies are modulated by the transmission holes on the modulation disc, synchronous measurement of three gases is realized through the infrared absorption characteristics of the gases, light beams with three different wavelengths are formed by narrow-band filtering on the optical filter, the three light beams irradiate the infrared sensor through the optical filter, the light beams are absorbed by the corresponding gases, the content of one gas in the air to be detected is obtained through the intensity of the absorbed light beams, the synchronous measurement of the three gases is realized, the operation is simple, and the time is saved.
2. According to the optical filter film layer gas detector disclosed by the utility model, high-pressure air enters the housing through the guide pipe, and the generated air flow spirally moves around the inner wall of the housing and is exhausted through the exhaust hole of the housing, so that the air in the housing is exhausted, the initial calibration of the optical filter film layer gas detector is facilitated, and the interference generated by the residual gas in the previous measurement is reduced.
Drawings
FIG. 1 is a schematic view of a structure according to the present invention;
FIG. 2 is a schematic view of the partial cross-sectional structure of FIG. 1;
FIG. 3 is a partial cross-sectional structural schematic view of the purification assembly of the present invention;
fig. 4 is a schematic structural diagram of the working state of the present invention.
In the figure: the device comprises a control switch 1, a shell 2, a valve 3, a purification assembly 4, a shell 41, a metal wire mesh layer 42, a calcium chloride dehumidification layer 43, a glass fiber filter paper layer 44, an activated carbon adsorption layer 45, an air pump 5, a motor 6, a modulation disc 7, an infrared light source 8, an optical filter 9, a transmission hole 10, a housing 11, a guide pipe 12, an infrared sensor 13 and an exhaust hole 14.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1-4, the present embodiment discloses a three-narrow-band optical filter film gas detector, which includes a housing 2, an infrared light source 8 and a housing 11 are disposed in the housing 2, an opening is disposed on the housing 11 facing the infrared light source 8, an optical filter 9 is mounted on the opening, three narrow bands transmitting infrared light according to wavelength are disposed on the optical filter 9, an air inlet and an air outlet 14 are disposed on the housing 11, an outer side of the air inlet of the housing 11 is connected to one end of a connecting pipe, another end of the connecting pipe penetrates through the housing 2 and is connected to an air outlet of an air pump 5, an outer side of the air outlet 14 is connected to one end of an air outlet pipe, and another end of the air outlet pipe penetrates through and extends to an outer side of the housing 2.
The inner cavity of the shell 2 is provided with a motor 6, an output shaft of the motor 6 is provided with a coaxial modulation disc 7, the modulation disc 7 is provided with three groups of annular concentric transmission holes 10, the infrared light source 8 and the cover 11 are positioned at two sides of the modulation disc 7, and preferably, different groups of transmission holes 10 are arranged in a staggered manner in the radial direction of the modulation disc 7.
The outside of casing 2 is equipped with control switch 1, and control switch 1's input and the output of external power source are connected, and control switch 1's output is connected with the input of air pump 5 and the input of motor 6 electricity respectively.
Furthermore, the housing 11 is a cylindrical housing, the infrared sensor 13 is located at the bottom side of the inner cavity of the cylindrical housing, the conduit 12 communicated with the inner cavity of the cylindrical housing is installed at the position, away from the opening, on the outer peripheral side of the cylindrical housing, the other end of the conduit 12 penetrates through and extends to the outer side of the housing 2, the exhaust hole 14 of the housing 11 is located in the middle of the bottom side of the inner cavity of the housing 11, and the optical filter 9 is hermetically installed on the opening of the housing 11.
The end of the conduit 12 outside the housing 2 is fitted with a valve 3.
Specifically, as shown in fig. 2 and 3, a purification assembly 4 is installed between the air pump 5 and the connection pipe, the purification assembly 4 includes a housing 41, an air inlet and an air outlet are opened on the housing 41, the air inlet of the housing 41 is connected with the air outlet of the air pump 5, the air outlet of the housing 41 is connected with one end of the connection pipe located outside the housing 2, and a metal wire mesh layer 42, a calcium chloride dehumidification layer 43, a glass fiber filter paper layer 44 and an activated carbon adsorption layer 45 are sequentially arranged in the housing 41 along an air flowing direction.
The optical filter 9 is an optical lens with a photonic crystal coating in the prior art, the optical filter 9 realizes three-channel narrow-band filtering on a single optical lens by using a vacuum coating technology, and the optical filter is plated by using an ion beam assisted deposition method.
The photonic crystal is a novel artificial optical material, is mainly characterized by the existence of photon forbidden bands, has relatively simple one-dimensional photonic crystal structure, is easy to prepare, and has important application value for the development of optical related industries such as optics, photoelectrons, optical communication and the like; photonic crystals are artificial periodic dielectric structures, sometimes also referred to as PBG photonic crystal structures, having the property of a photonic band gap, which means that waves of a certain frequency range cannot propagate in the periodic structure, i.e. the structure itself presents a "forbidden band".
The control switch 1, the air pump 5, the motor 6 and the like used in the utility model are common electronic components in the prior art, and the working mode and the circuit structure thereof are well known technologies and are not described herein; the infrared light source 8 and the infrared sensor 13 are common electronic components of infrared gas detection equipment in the prior art, and the working mode and the circuit structure thereof are well known technologies and are not described herein again.
The control switch 1 can respectively control the air pump 5 and the motor 6 to work.
The output end of the infrared sensor 13 is electrically connected with the input end of an external computer.
The motor 6 is a stepping motor or a servo motor.
The working process and principle of the embodiment are as follows:
the air pump 5 is electrified to work, the air pump 5 enables air to be detected to enter the housing 11, then the air is discharged out of the shell 2 through the exhaust hole 14 and the air outlet pipe, and the infrared light source 8 is electrified to emit infrared light;
the motor 6 is controlled to work through the control switch 1, the motor 6 drives the modulation disc 7 to rotate, infrared light sources with three frequencies are modulated through the transmission holes 10 in the modulation disc 7, and synchronous measurement of three gases is realized through the infrared absorption characteristics of the gases;
the light beams with three different wavelengths are formed by narrow-band filtering on the optical filter 9, the three light beams irradiate the infrared sensor 13 through the optical filter 9, the light beams are absorbed by corresponding gases, and the content of one gas in the air to be detected is obtained through the intensity of the absorbed light beams.
The wire mesh layer 42 in the purification component 4 can filter large dust particles; the calcium chloride dehumidification layer 43 absorbs moisture in the air to be detected, so that the moisture in the housing 11 is prevented from being condensed into water drops to cause scattering of infrared light; the glass fiber filter paper layer 44 filters dust particles, and the active carbon adsorption layer 45 adsorbs volatile substances in the air to be detected.
The outside compressed air tank is connected with the air inlet of the valve 3, the valve 3 is opened, high-pressure air in the compressed air tank enters the housing 11 through the guide pipe 12, generated air flow spirally moves around the inner wall of the housing 11 and is exhausted through the exhaust hole 14 of the housing 11, the air in the housing 11 is exhausted, initial calibration of the optical filter film layer gas detector is facilitated, and interference caused by the previous measurement of residual gas is reduced.
The parts which are not disclosed in the utility model are all the prior art, and the specific structure, the materials and the working principle are not detailed; the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, simplifications, which do not depart from the principle of the present invention, should be equivalent substitutions for those of ordinary skill in the art, which should be covered by the scope of the claims and the specification of the present invention.
Claims (5)
1. Three narrowband optical filter rete gas detector, including casing (2), its characterized in that: an infrared light source (8) and a housing (11) are arranged in the shell (2), an opening is formed in the position, facing the infrared light source (8), of the housing (11), an optical filter (9) is installed on the opening, three narrow bands are arranged on the optical filter (9), an air inlet and an exhaust hole (14) are formed in the housing (11), the outer side of the air inlet of the housing (11) is connected with one end of a connecting pipe, the other end of the connecting pipe penetrates through the shell (2) and is connected with an air outlet of the air pump (5), the outer side of the exhaust hole (14) is connected with one end of an exhaust pipe, and the other end of the exhaust pipe penetrates through and extends to the outer side of the shell (2);
the infrared light source device is characterized in that a motor (6) is installed in the inner cavity of the shell (2), a coaxial modulation disc (7) is installed on an output shaft of the motor (6), three groups of transmission holes (10) which are annularly arranged are formed in the modulation disc (7), and the infrared light source (8) and the housing (11) are located on two sides of the modulation disc (7).
2. The gas detector of claim 1, wherein: the outside of casing (2) is equipped with control switch (1), the input of control switch (1) and external power source's output electricity are connected, the output of control switch (1) is connected with the input of air pump (5) and the input electricity of motor (6) respectively.
3. The gas detector of claim 1, wherein: the shell (11) is a cylindrical shell, the infrared sensor (13) is positioned on the bottom side of the inner cavity of the cylindrical shell, a guide pipe (12) communicated with the inner cavity of the cylindrical shell is installed at the position, away from the opening, of the outer peripheral side of the cylindrical shell, the other end of the guide pipe (12) penetrates through and extends to the outer side of the shell (2), and an exhaust hole (14) of the shell (11) is positioned in the middle of the bottom side of the inner cavity of the shell (11).
4. The gas detector of claim 3, wherein: and a valve (3) is arranged at one end of the guide pipe (12) positioned outside the shell (2).
5. The gas detector of claim 1, wherein: install between air pump (5) and the connecting pipe and purify subassembly (4), it includes shell (41) to purify subassembly (4), air inlet and gas outlet have been seted up on shell (41), the air inlet of shell (41) and the gas outlet of air pump (5) are connected, the gas outlet of shell (41) with the connecting pipe is located the outer one end of casing (2) and connects, be equipped with wire mesh layer (42), calcium chloride except that wet layer (43), glass fiber filter paper layer (44) and active carbon adsorbed layer (45) along the air flow direction in proper order in shell (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121443094.1U CN215339500U (en) | 2021-06-28 | 2021-06-28 | Three narrow band optical filter film gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121443094.1U CN215339500U (en) | 2021-06-28 | 2021-06-28 | Three narrow band optical filter film gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215339500U true CN215339500U (en) | 2021-12-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121443094.1U Expired - Fee Related CN215339500U (en) | 2021-06-28 | 2021-06-28 | Three narrow band optical filter film gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215339500U (en) |
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2021
- 2021-06-28 CN CN202121443094.1U patent/CN215339500U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211228 |