CN106410345A - Pressure control based terahertz waveguide device based on pressure control of inert gas, and control method - Google Patents
Pressure control based terahertz waveguide device based on pressure control of inert gas, and control method Download PDFInfo
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- CN106410345A CN106410345A CN201610930002.XA CN201610930002A CN106410345A CN 106410345 A CN106410345 A CN 106410345A CN 201610930002 A CN201610930002 A CN 201610930002A CN 106410345 A CN106410345 A CN 106410345A
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- Prior art keywords
- base tube
- waveguide device
- inert gas
- terahertz waveguide
- pressure
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
- H01P3/127—Hollow waveguides with a circular, elliptic, or parabolic cross-section
Abstract
The invention provides a terahertz waveguide device. The terahertz waveguide device comprises a base tube, the base tube is made of a polymeric material, the base tube is filled up with the inert gas, and the inert gas forms pressure distribution in a uniform linear successively decreasing mode in the base tube. The invention further provides a control method of the terahertz waveguide device. The terahertz waveguide device and the control method thereof, provided by the invention, take the polymeric material as the base tube, through introducing the inert gas, can reduce scattering, have higher transmission performance and can be applied to long-distance transmission.
Description
Technical field
The present invention relates to a kind of terahertz waveguide device, more particularly, to a kind of terahertz based on pressure controlled inert gas
Hereby waveguide device and control method.
Background technology
Terahertz (THz) refers to frequency from 0.1～10THz, the electromagnetic radiation region between millimeter wave and infrared light.
Due to specific position on electromagnetic spectrum for the THz wave, it has much superior characteristic and very important academic and application valency
Value.Research for Terahertz Technology is concentrated mainly on several aspect such as detection, imaging, transmission, frequency spectrum at present.
At present waveguide is based on metallic waveguide, however, because metallic waveguide inside surface roughness is big, lack of homogeneity
And cause dispersion, have impact on the performance of transmission.In addition, THz wave is lost very big, hardly possible during metallic waveguide transmission
To carry out long-distance transmissions.
Content of the invention
As can be seen here, it is necessory to provide a kind of terahertz that there is more preferable transmission performance and can be used in long-distance transmissions
Hereby waveguide device.
A kind of terahertz waveguide device, wherein, described terahertz waveguide device includes base tube, and the material of described base tube is poly-
It is filled with inert gas, described inert gas forms the pressure that homogenous linear successively decreases in base tube in compound material, and described base tube
Power is distributed.
Wherein in an embodiment, described inert gas includes helium, neon, argon, krypton, at least one in xenon.
Difference wherein in an embodiment, between high-pressure side that described inert gas is formed in base tube and low-pressure end
For 1atm-3atm.
Wherein in an embodiment, described polymeric material is 1.4-2.0 to the refractive index of THz wave.
Wherein in an embodiment, described polymeric material is polyethylene, polytetrafluoroethylene (PTFE), polymethylpentene, cyclenes
One of hydrocarbon type copolymer.
Wherein in an embodiment, described base tube is the tubular structure that pure polytetrafluoroethylene (PTFE) is formed.
Wherein in an embodiment, the radius R of described base tube meetsTo transmitMould, λ is terahertz
The hereby wavelength of ripple.
Wherein in an embodiment, further included waveguide aerator, described waveguide aerator is with described base tube even
Logical, for being filled with inert gas to base tube, and the air pressure of described inert gas homogenous linear in base tube successively decreases distribution.
A kind of control method of terahertz waveguide device, including：
Obtain the current gas pressure monitoring signals of various location in base tube；
Obtain current gas pressure distribution according to current gas pressure monitoring signals；
Obtain the mean value of current gas pressure distribution according to current gas pressure distribution；
Obtain the air pressure difference between the mean value of current gas pressure distribution and setting value；
Adjusted according to air pressure difference, adjustment inflation rate is so that the air pressure of inert gas in base tube forms homogenous linear passs
The distribution subtracting.
Wherein in an embodiment, the air pressure difference between the mean value of described current gas pressure distribution and setting value is
Timing, reduces inflation rate to reduce the air pressure in base tube, so that air pressure reaches predetermined value；When putting down of described current gas pressure distribution
When draught head between average and setting value is negative, then improves inflation rate, to improve air pressure in base tube, make up to predetermined
Value；When described air pressure difference is zero, then keep current inflation rate.
The terahertz waveguide device providing with respect to conventional art, the present invention, by base tube is used as using polymeric material,
And by being filled with inert gas, scattering being reduced, thus having higher transmission performance, can be applied to pass at a distance
Defeated.
Brief description
Fig. 1 is the structural representation of terahertz waveguide device provided in an embodiment of the present invention；
Fig. 2 is provided in an embodiment of the present invention to input inert gas in terahertz waveguide device by waveguide aerator
Structural representation；
Fig. 3 is the flow chart of the control method of terahertz waveguide device provided in an embodiment of the present invention.
Main element symbol description
| Base tube | 10 |
| Inert gas | 20 |
| Waveguide aerator | 100 |
| Air pump | 110 |
| Drier | 120 |
| Pressure monitor | 130 |
| Power module | 140 |
| Control module | 150 |
| Display and performing module | 160 |
| Inflator module | 170 |
Specific embodiment
The terahertz based on pressure controlled the inert gas below in conjunction with the accompanying drawings and the specific embodiments present invention being provided
Hereby waveguide is described in further detail.
Please also refer to Fig. 1, provided in an embodiment of the present invention included based on the terahertz waveguide device of macromolecular compound
Base tube 10 and be filled in the inert gas 20 in base tube 10.
Described base tube 10 is circular hollow pipe, and described hollow pipe has smooth inner surface.The internal diameter R of described hollow pipe
Can be selected according to transmission mode.Specifically, generally：
Transmit in hollow pipeThe radius R of mould should meetAnd adoptingWhen die worker makees, should makeWherein 3.41,2.61 and 2.06 are to calculate, according to cut-off frequency, the empirical value obtaining, so that THz wave exists
Propagation that can be stable in base tube 20.
In described base tube 20, the frequency of the THz wave of input can be 0.1～3.0THz, in the present embodiment, described Terahertz
The frequency of ripple is 1THz.The material of described base tube 10 is the polymeric material transparent to THz wave, described polymeric material
Absorption coefficient is less than or equal to 0.5cm at 1THz-1, and be in approximately that parabolic type increases such that it is able to reduce loss with frequency, increase
Transmission range；Described polymeric material is 1.4-2.0 it is preferred that described polymeric material is to too to the refractive index of THz wave
The refractive index of Hertz wave is 1.4-1.6, so that reducing loss while described base tube 10 is transparent to THz wave further.
Described polymeric material can be polyethylene (PE), polytetrafluoroethylene (PTFE) (PTFE), polymethylpentene (TPX), cyclenes hydrocarbon type copolymer
One of (COC).Further, described polyethylene can be low density polyethylene (LDPE) (LDPE) or high density polyethylene (HDPE) (HDPE).Institute
The one end stating base tube 20 can be connected with THz wave input unit (not shown), and described THz wave input unit is used for base tube
THz wave is inputted in 20；The other end of described base tube 20 can be connected with THz wave reception device (not shown), described terahertz
Hereby wave receiving device is used for receiving the incoming THz wave of base tube 20.See also table 1, be THz wave of the present invention
Material and its characteristic that in conduit, base tube is adopted.
The characteristic (f≤1THz) of table 1. terahertz waveguide device
| Polymer | Absorptivity (unit：cm-1) | Refractive index |
| PTFE | <0.45 | 1.43–1.44 |
| HDPE | <0.4 | 1.5–1.56 |
| COC | <0.25 | 1.51–1.53 |
Because using polymeric material, as base tube 10, the material of described base tube 10 is to THz wave highly transparent, dispersion
Little and there is good pliability, and physicochemical properties are stable, therefore can effectively evade metal material base tube due to interior
Wall roughness is big, lack of homogeneity and the larger scattering that causes, has more preferable transmission performance.It is appreciated that above-mentioned material is only
For specific embodiment, described polymeric material is transparent to THz wave.In the present embodiment, described polymeric material is poly-
Tetrafluoroethene.
See also Fig. 2, described inert gas 20 is filled in described base tube 10, described inert gas can for helium, neon,
One or more of monoatomic gases such as argon, krypton, xenon.Specifically, described inert gas 20 can in the way of homogenous linear stream
Lead in described base tube 10, thus forming stable airflow field in base tube 10.Specifically, described inert gas 20 can be in base tube
Form the pressure distribution that homogenous linear successively decreases, i.e. pressure distribution between the high-pressure side of described inert gas 20 and low-pressure end in 10
Keep constant for the difference between linear decrease, and high-pressure side and low-pressure end.It is appreciated that described high-pressure side and low-pressure end are
For referring to the relative barometric pressure at base tube 10 two ends.Further, between the high-pressure side of described base tube 10 and low-pressure end, pressure difference value can be
1atm-3atm, such as 1atm, 2atm etc., and described pressure difference value keeps constant.In the present embodiment, in described base tube 10
Air inlet apply depression formation low-pressure end, described gas outlet apply high pressure formed high-pressure side, with reduce loss, improve input
Efficiency, the pressure difference value between described air inlet and gas outlet is 2atm, and keeps constant.Further, by adopting indifferent gas
Body 20 can effectively evade moisture in air to the impact propagated as transmission medium；Further, since inert gas 20 is described
Form, in base tube 10, the pressure distribution that homogenous linear successively decreases, loss in base tube 10 for the THz wave can be reduced, therefore described
THz wave can be stable in inert gas 20 propagation.
Described base tube 10 can be filled with inert gas by waveguide aerator 100 in described base tube 10, forms stable gas
?.It is appreciated that described atmospheric pressure value can be the numerical value recording under normal temperature and pressure state (25 DEG C, 1atm).
Described waveguide aerator 100 includes air pump 110, drier 120, pressure monitor 130, power module 140, controls
Module 150, display and performing module 160 and inflator module 170.Described air pump 110 is used for exporting inert gas；Described drier
120 are used for being dried process to the inert gas of output, to remove the aqueous vapor in inert gas；Described pressure monitor 130
For monitoring the size of air pressure in base tube 10, and monitoring result is exported to control module 150；Described control module 150 is used for
To air pump 110 output inert gas be controlled, and according in monitoring result real-time adjustment air pump 110 inert gas defeated
Go out；Described display and performing module 160 are used for showing current air pressure etc., and the control instruction of receives input, and control is referred to
Order is transmitted and is automatically controlled with the air-flow that air pump 110 is exported to control module 150；Described power module 140 is used for providing
Power supply；The inert gas that described inflator module 170 is used for exporting air pump 110 inputs in base tube 10.Described inert gas 20 can
By the air inlet (not shown) at described base tube 10 two ends and base tube 10 described in exhaust outlet (not shown) inflow and outflow.The present embodiment
In, described inlet port applies low pressure, and applies high pressure in outlet port, thus being formed uniformly in inlet port and outlet port
The pressure distribution of linear decrease.Further, described waveguide aerator 100 may also include a manual control unit (not shown),
Described manual control unit is used for carrying out the Non-follow control such as manually opened, closing to the air-flow of air pump 110 output, to fill in waveguide
When mechanism of qi 100 works abnormal under automatic control mode, Non-follow control is carried out to air pump 110, to avoid base tube 10 is caused
Impact.Inert gas 20 described in the present embodiment, as the transmission medium of Terahertz, can effectively evade air, aqueous vapor etc. to too
The impact that Hertz wave is propagated, reducing dispersion in base tube 10 for the THz wave, thus reducing the loss of THz wave, increased
The transmission range of THz wave.
See also Fig. 3, the embodiment of the present invention further provide for a kind of using above-mentioned waveguide aerator 100 to base tube
100 flow processs being inflated include：
Step S10, obtains the current gas pressure monitoring signals of various location in base tube；
Step S20, obtains current gas pressure distribution according to current gas pressure monitoring signals；
Step S30, obtains the mean value of current gas pressure distribution according to current gas pressure distribution；
Step S40, obtains the air pressure difference between the mean value of current gas pressure distribution and setting value；
Step S50, adjusts according to air pressure difference, and adjustment inflation rate is so that the air pressure of inert gas in base tube is formed all
The distribution of even linear decrease.
Specifically, in step s 50, the air pressure difference between the mean value of described current gas pressure distribution and setting value is
Timing, illustrates that current gas pressure already above predetermined value, then reduces inflation rate to reduce the air pressure in base tube 10, so that air pressure is steady
It is scheduled on predetermined value；When draught head between the mean value of described current gas pressure distribution and setting value is negative, then current gas is described
Pressure already below preset value, then improves inflation rate, to improve air pressure in base tube 10, makes up to predetermined value；Similar, work as institute
When to state air pressure difference be zero, then illustrate that current inflation rate has been able to stablize the air pressure difference in base tube 10, thus keeping working as
Front inflation rate.Methods described can monitor in real time and feed back the air pressure change of the inert gas in base tube 10, and root
According to the result adjustment aeration gas flow of feedback, the distribution thus homogenous linear realizing gas field in base tube 10 successively decreases.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of terahertz waveguide device is it is characterised in that described terahertz waveguide device includes base tube, the material of described base tube
It is filled with inert gas in polymeric material, and described base tube, described inert gas forms homogenous linear in base tube and successively decreases
Pressure distribution.
2. terahertz waveguide device as claimed in claim 1 it is characterised in that described inert gas include helium, neon, argon, krypton,
At least one in xenon.
3. terahertz waveguide device as claimed in claim 2 is it is characterised in that the height that formed in base tube of described inert gas
Difference between pressure side and low-pressure end is 1atm-3atm.
4. terahertz waveguide device as claimed in claim 1 is it is characterised in that the folding to THz wave for the described polymeric material
Rate of penetrating is 1.4-2.0.
5. terahertz waveguide device as claimed in claim 1 it is characterised in that described polymeric material be polyethylene, poly- four
One of PVF, polymethylpentene, cyclenes hydrocarbon type copolymer.
6. terahertz waveguide device as claimed in claim 1 is it is characterised in that described base tube is pure polytetrafluoroethylene (PTFE) formation
Tubular structure.
7. terahertz waveguide device as claimed in claim 1 is it is characterised in that the radius R of described base tube meetsTo transmitMould, λ is the wavelength of THz wave.
8. terahertz waveguide device as claimed in claim 1 is it is characterised in that further include waveguide aerator, described ripple
Lead inflator to connect with described base tube, for being filled with inert gas to base tube, and the air pressure of described inert gas is equal in base tube
Even linear decrease distribution.
9. in a kind of claim 1-8 the terahertz waveguide device described in any one control method, including：
Obtain the current gas pressure monitoring signals of various location in base tube；
Obtain current gas pressure distribution according to current gas pressure monitoring signals；
Obtain the mean value of current gas pressure distribution according to current gas pressure distribution；
Obtain the air pressure difference between the mean value of current gas pressure distribution and setting value；
Adjusted according to air pressure difference, adjustment inflation rate is so that the air pressure of inert gas in base tube forms what homogenous linear successively decreased
Distribution.
10. the control method of terahertz waveguide device as claimed in claim 9 is it is characterised in that when described current gas pressure divides
Air pressure difference between the mean value of cloth and setting value is timing, reduces inflation rate to reduce the air pressure in base tube, so that gas
Pressure reaches predetermined value；When draught head between the mean value of described current gas pressure distribution and setting value is negative, then improve inflation
Speed, to improve air pressure in base tube, makes up to predetermined value；When described air pressure difference is zero, then keep current inflation rate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610930002.XA CN106410345A (en) | 2016-10-31 | 2016-10-31 | Pressure control based terahertz waveguide device based on pressure control of inert gas, and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610930002.XA CN106410345A (en) | 2016-10-31 | 2016-10-31 | Pressure control based terahertz waveguide device based on pressure control of inert gas, and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595652A (en) * | 2019-09-18 | 2019-12-20 | 上海理工大学 | Pressure sensing method based on terahertz anti-resonance hollow waveguide |
| CN107819504B (en) * | 2017-09-07 | 2021-05-04 | 王汝平 | Information transmission method based on ready-made hollow pipeline network |
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