CN204044064U - Detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas - Google Patents
Detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas Download PDFInfo
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- CN204044064U CN204044064U CN201420473731.3U CN201420473731U CN204044064U CN 204044064 U CN204044064 U CN 204044064U CN 201420473731 U CN201420473731 U CN 201420473731U CN 204044064 U CN204044064 U CN 204044064U
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Abstract
A kind ofly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, comprise cylinder blanket, the top of cylinder blanket one side bus is provided with laser incidence window, bottom is provided with laser emitting window, the cylinder blanket relative with this side bus opposite side bus top is provided with air intake opening, bottom is provided with gas outlet; Described cylinder blanket inwall is provided with three concave spherical mirrors by screw, and the first concave spherical mirror is between incidence window and exit window, and the second concave spherical mirror and the 3rd concave spherical mirror are disposed in parallel between air intake opening and gas outlet up and down; The outside of described incidence window is tiltedly installed with entrance port concave mirror, and the outside of exit window is tiltedly installed with exit portal concave mirror.The utility model can complete multiple reflections in small size, and light path is increased, and realizes office in the oil to low concentration and puts failure gas and detect.
Description
Technical field
The utility model relates to gas detection technology field, particularly a kind ofly puts the sample cell of failure gas based on office in the detection oil of terahertz time-domain spectroscopic technology.
Background technology
In recent years, terahertz time-domain spectroscopic technology obtains and develops widely and apply in gas detect.Terahertz time-domain spectroscopic technology is a kind of novel relevant far-infrared spectrum measuring technique based on femtosecond laser, its ultimate principle utilizes femtosecond pulse to produce and the Terahertz electric field of detection time resolution, the spectral information of tested article is obtained by Fourier transform, because macromolecular vibration and rotational energy level are mostly at terahertz wave band, and large molecule, particularly the large molecule of biological and chemical is the material group with physical property own, and then can carry out analysis and identification by its characteristic frequency to the structure of matter, physical property.
Use the method that terahertz time-domain spectroscopic technology detects partial discharges fault gas in transformer oil, the component of failure gas and the content of each component can be dissolved by detecting in transformer oil, and then analyze local discharge of electrical equipment degree.But the failure gas put due to office in Oil-filled Electrical Equipments and produce is extremely micro-, utilize terahertz time-domain spectroscopic technology to detect to need to reach sufficiently long light path when the content of failure gas is put in office in oil and could meet testing requirement, and traditional cell volume is little, generally be used for detecting the sample of higher concentration, therefore office in Oil-filled Electrical Equipments can not be met put the testing requirement of failure gas.Therefore, be necessary that design is a kind of and put the sample cell of failure gas based on office in the detection oil of terahertz time-domain spectroscopic technology.
Utility model content
In view of above-mentioned prior art Problems existing, the utility model provide a kind of be applicable to electrical equipment office put that failure gas detects, based on terahertz time-domain spectroscopic technology, the sample cell that failure gas detects is put to office in oil, detect to realize putting failure gas to office in the oil of low concentration in small size environment.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
A kind ofly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, comprise cylinder blanket, the top of cylinder blanket one side bus is provided with laser incidence window, bottom is provided with laser emitting window, the cylinder blanket relative with this side bus opposite side bus top is provided with air intake opening, bottom is provided with gas outlet; Described cylinder blanket inwall is provided with the identical concave spherical mirror of three curvature by screw, and the first concave spherical mirror is between incidence window and exit window, and the second concave spherical mirror and the 3rd concave spherical mirror are disposed in parallel between air intake opening and gas outlet up and down; The outside of described incidence window is tiltedly installed with entrance port concave mirror, and the outside of exit window is tiltedly installed with exit portal concave mirror.
Above-mentionedly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, the center of curvature of described first concave spherical mirror drops on the central spot between the second concave spherical mirror and the 3rd concave spherical mirror, the center of curvature of the second concave spherical mirror drops on the middle and upper part of the first concave spherical mirror, the center of curvature of the 3rd concave spherical mirror drops on the middle and lower part of the first concave spherical mirror, and the center of curvature of the center of curvature of the second concave spherical mirror and the 3rd concave spherical mirror is centrally symmetrical up and down on the first concave spherical mirror.
Above-mentionedly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, described three concave spherical mirrors are arranged on cylinder blanket inwall respectively by mirror holder, and mirror holder is fixed on cylinder blanket inwall by three screws; Three screw triangularities and being symmetrical arranged about cylinder bus.
Above-mentionedly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, the minute surface of described three concave spherical mirrors is all stained with aluminium film.
Owing to have employed above technical scheme, the technical progress effect acquired by the utility model is as follows:
The utility model accurately can detect office in the oil of low concentration puts failure gas sample, and this sample cell can complete multiple reflections in small size, light path is increased, the content of component and each component of dissolving failure gas can be detected in oil than traditional sample cell more accurately and efficiently, and then analyze local discharge of electrical equipment degree.In addition, the utility model can change light path according to actual testing requirement manual adjustments concave spherical mirror.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is concave spherical mirror described in the utility model location schematic diagram.
In figure, each label is expressed as: 1. incidence window, 2. exit window, 3. air intake opening, 4. gas outlet, 5. the first concave spherical mirror, 6. the second concave spherical mirror, 7. the 3rd concave spherical mirror, 8. entrance port concave mirror, 9. exit portal concave mirror, 10. cylinder blanket, 11. screws.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Structure of the present utility model as shown in Figure 1, it comprises cylinder blanket 10, the top of cylinder blanket 10 1 side bus is provided with laser incidence window 1, bottom is provided with laser emitting window 2, and the opposite side bus top of the cylinder blanket relative with this side bus is provided with air intake opening 3, bottom is provided with gas outlet 4.In the present embodiment, the internal diameter of cylinder blanket is 5cm, is highly 10cm.
Incidence window 1 and exit window 2 all adopt teflon to make, and can reduce incidence window and exit window to the impact of THz wave.The outside of incidence window 1 is tiltedly installed with entrance port concave mirror 8, for being focused in cylinder blanket by the THz pulses of radiation that THz crystal GaAs produces; The outside of exit window 2 is tiltedly installed with exit portal concave mirror 9, injects ZnTe crystal for being assembled by emergent light.
Cylinder blanket inwall is also provided with three concave spherical mirrors, three concave spherical mirrors are arranged on cylinder blanket inwall respectively by mirror holder, and mirror holder is fixed on cylinder blanket inwall by three screws 11; Three screw triangularities and being symmetrical arranged about cylinder bus, as shown in Figure 2.The utility model is in actual testing process, and the degree of tightness by set screw regulates the position of concave spherical mirror, to realize the object selecting suitable optical length.
On the inwall of the first concave spherical mirror 5 between incidence window 1 and exit window 2 of three concave spherical mirrors, the second concave spherical mirror 6 and the 3rd concave spherical mirror about 7 are disposed in parallel on the inwall between air intake opening 3 and gas outlet 4.The minute surface of three concave spherical mirrors is all stained with aluminium film, the reflectivity of concave spherical mirror in effective Terahertz frequency range can be made to bring up to more than 95%.
In the utility model, the curvature of three concave spherical mirrors is identical, and the center of curvature of the first concave spherical mirror 5 drops on the central spot between the second concave spherical mirror 6 and the 3rd concave spherical mirror 7, as a point in Fig. 1; The center of curvature of the second concave spherical mirror 6 drops on the middle and upper part of the first concave spherical mirror 5, as the b point in Fig. 1; The center of curvature of the 3rd concave spherical mirror 7 drops on the middle and lower part of the first concave spherical mirror 5, as the c point in Fig. 1; And the center of curvature of the center of curvature of the second concave spherical mirror 6 and the 3rd concave spherical mirror 7 is centrally symmetrical up and down on the first concave spherical mirror 5.
When the utility model uses, first the utility model is fixed; Secondly the position of each concave spherical mirror is regulated according to testing requirement, to select suitable optical length; Then, sample cell injected by THz ripple collimation to regulate two concave mirrors to guarantee, detector injected by the THz ripple collimation of injection; Finally send into detected sample from air intake opening.
THz wave trajectory is as shown in the direction of arrow in Fig. 1, through entrance port concave mirror after incidence window enters shell, inject the second concave spherical mirror, the first concave spherical mirror bottom is reflexed to through the second concave spherical mirror, the 3rd concave spherical mirror is reflexed to through the first concave spherical mirror bottom, the first concave spherical mirror top is reflexed to again by the 3rd concave spherical mirror, then the second concave spherical mirror is reflexed to through the first concave spherical mirror top, the first concave spherical mirror bottom is reflexed to again through the second concave spherical mirror, then the 3rd concave spherical mirror is reflexed to by the first concave spherical mirror bottom, finally to be reflexed to after exit portal concave mirror through exit window by the 3rd concave spherical mirror and penetrate.
Claims (4)
1. put the sample cell of failure gas based on office in terahertz time-domain spectroscopic technology detection oil for one kind, it is characterized in that: comprise cylinder blanket (10), the top of cylinder blanket (10) side bus is provided with laser incidence window (1), bottom is provided with laser emitting window (2), and the opposite side bus top of the cylinder blanket relative with this side bus is provided with air intake opening (3), bottom is provided with gas outlet (4);
Described cylinder blanket inwall is provided with the identical concave spherical mirror of three curvature by screw, first concave spherical mirror (5) is positioned between incidence window (1) and exit window (2), and the second concave spherical mirror (6) and the 3rd concave spherical mirror (7) are disposed in parallel between air intake opening (3) and gas outlet (4) up and down;
The outside of described incidence window (1) is tiltedly installed with entrance port concave mirror (8), and the outside of exit window (2) is tiltedly installed with exit portal concave mirror (9).
2. according to claim 1ly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, it is characterized in that: the center of curvature of described first concave spherical mirror (5) drops on the central spot between the second concave spherical mirror (6) and the 3rd concave spherical mirror (7), the center of curvature of the second concave spherical mirror (6) drops on the middle and upper part of the first concave spherical mirror (5), the center of curvature of the 3rd concave spherical mirror (7) drops on the middle and lower part of the first concave spherical mirror (5), and the center of curvature of the center of curvature of the second concave spherical mirror (6) and the 3rd concave spherical mirror (7) is centrally symmetrical up and down on the first concave spherical mirror (5).
3. according to claim 2ly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, it is characterized in that: described three concave spherical mirrors are arranged on cylinder blanket inwall respectively by mirror holder, and mirror holder is fixed on cylinder blanket inwall by three screws; Three screw triangularities and being symmetrical arranged about cylinder bus.
4. according to claim 3ly detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas, it is characterized in that: the minute surface of described three concave spherical mirrors is all stained with aluminium film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420473731.3U CN204044064U (en) | 2014-08-21 | 2014-08-21 | Detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420473731.3U CN204044064U (en) | 2014-08-21 | 2014-08-21 | Detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas |
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| CN204044064U true CN204044064U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420473731.3U Expired - Fee Related CN204044064U (en) | 2014-08-21 | 2014-08-21 | Detect office in oil based on terahertz time-domain spectroscopic technology and put the sample cell of failure gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784625A (en) * | 2016-03-15 | 2016-07-20 | 上海理工大学 | Device for remotely detecting hazardous gas on basis of TeraHertz wave |
| CN106018291A (en) * | 2015-03-25 | 2016-10-12 | 通用电气公司 | Methods and systems to analyze a gas-mixture |
| CN106773023A (en) * | 2017-02-23 | 2017-05-31 | 伯纳激光科技有限公司 | It is a kind of for dynamic regulation laser beam size and the device of divergence |
| CN108398402A (en) * | 2018-01-11 | 2018-08-14 | 清华大学 | More light path air absorbing cavities and its trace gas measuring system |
| CN112461778A (en) * | 2020-11-09 | 2021-03-09 | 蚌埠依爱消防电子有限责任公司 | High-precision multi-channel combustible gas detector |
-
2014
- 2014-08-21 CN CN201420473731.3U patent/CN204044064U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018291A (en) * | 2015-03-25 | 2016-10-12 | 通用电气公司 | Methods and systems to analyze a gas-mixture |
| CN105784625A (en) * | 2016-03-15 | 2016-07-20 | 上海理工大学 | Device for remotely detecting hazardous gas on basis of TeraHertz wave |
| CN105784625B (en) * | 2016-03-15 | 2018-10-12 | 上海理工大学 | Detect the device of hazardous gas at a distance based on THz wave |
| CN106773023A (en) * | 2017-02-23 | 2017-05-31 | 伯纳激光科技有限公司 | It is a kind of for dynamic regulation laser beam size and the device of divergence |
| CN108398402A (en) * | 2018-01-11 | 2018-08-14 | 清华大学 | More light path air absorbing cavities and its trace gas measuring system |
| CN112461778A (en) * | 2020-11-09 | 2021-03-09 | 蚌埠依爱消防电子有限责任公司 | High-precision multi-channel combustible gas detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20141224 Termination date: 20160821 |