CN106192712A - Bituminous paving microwave heating means on the spot based on electromagnetism Meta Materials - Google Patents
Bituminous paving microwave heating means on the spot based on electromagnetism Meta Materials Download PDFInfo
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- CN106192712A CN106192712A CN201610584534.2A CN201610584534A CN106192712A CN 106192712 A CN106192712 A CN 106192712A CN 201610584534 A CN201610584534 A CN 201610584534A CN 106192712 A CN106192712 A CN 106192712A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/14—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces for heating or drying foundation, paving, or materials thereon, e.g. paint
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Abstract
The present invention relates to the microwave heating method of bituminous paving, specifically disclose a kind of bituminous paving microwave heating means on the spot based on electromagnetism Meta Materials, comprise the following steps: step 1, design cycle property material: uniform period arrangement resonant ring on the two dimensional surface of first medium plate, to obtain final product；Step 2, is placed on described aperiodic materials on bituminous paving, and described aperiodic materials forms electromagnetism Meta Materials with described road surface；Step 3, then above described aperiodic materials, place microwave heating equipment, adjusting standing wave ratio to less than 2, bituminous paving is heated on the spot.Aperiodic materials of the present invention can form local, periodic resonance range, strengthens the field strength that bituminous paving is distributed around, and increases thermal losses energy, improves microwave thermal transformation efficiency, improves the uniformity of microwave heating.The heating recovery of asphalt is recycled and is significant by the present invention.
Description
Method field
The present invention relates to the microwave heating method of bituminous paving, particularly to a kind of bituminous paving based on electromagnetism Meta Materials
Microwave heating means on the spot.
Background method
In highway maintenance and method for maintaining, asphalt in-situ heat regeneration increasingly receives publicity.The most employings
Bituminous paving is heated by naked light, infrared method or microwave method on the spot so that it is softens and is beneficial to wash plane recycling,
The in-situ heat regeneration of asphalt is conducive to waste disposal, resources conservation and environmental conservation, its economic benefit and society's valency
It is worth the most considerable.
It it is one of the key method of Colophonium in-situ heat regeneration to the heating of existing bituminous paving.Bituminous paving is carrying out heat again
Must heat before death so that it is relatively low fuel can be consumed in relatively short period of time, be heated to required temperature, could be used for
Hot recycling；Heating-up temperature is the lowest, road surface softening degree not, should not harrow pine, and it is the lowest to cause mixing and stirring temperature, affects product matter
Amount；Otherwise, heating-up temperature is the highest, and Bituminous concrete surface easily decomposes, and causes aging, the coking of Colophonium, finally affects asphalt
Pavement performance.In multiple heat source and mode of heating, microwave heating has the advantages such as firing rate is fast, penetration capacity is strong,
Avoid the aging and phenomenon of heating inequality that Colophonium causes owing to being heated by excess, also effectively prevent due to asphalt component
The problem of environmental pollution volatilized and cause.
In recent years, research worker, by the way of spraying blended emulsifier at bituminous paving, further increases microwave and adds
The efficiency of heat, substantially reduces the working time so that extensive maintenance of surface heavily spreads and is possibly realized.But, microwave heats on the spot
In bituminous paving method, however it remains many difficult points, mainly having the shortcomings such as penetration depth is excessive, thermal transition efficiency is low, these are tight
Heavily constrain industrialized development.
Summary of the invention
For problem present in existing method, it is an object of the invention to provide a kind of electromagnetism Meta Materials bituminous paving micro-
Ripple heating means on the spot, increase the thermal losses energy of bituminous paving, improve microwave thermal transformation efficiency.
In order to achieve the above object, the present invention uses following methods scheme to be achieved.
A kind of bituminous paving microwave heating means on the spot based on electromagnetism Meta Materials, it is characterised in that comprise the following steps:
Step 1, design cycle property material: uniform period arrangement resonant ring on the two dimensional surface of first medium plate, to obtain final product；
Step 2, is placed on described aperiodic materials on bituminous paving, described aperiodic materials and described bituminous paving shape
Become electromagnetism Meta Materials；
Step 3, then above described aperiodic materials, place microwave heating equipment, adjusting standing wave ratio to less than 2, to drip
Blue or green road surface is heated on the spot.
The feature of the present invention and being further improved to:
In step 1, described resonant ring is metal resonant ring.
In step 1, the structure of described resonant ring is planar spiral-type.
In step 1, the structure of described resonant ring is micro-strip Stepped Impedance type.
In step 3, the regulation of described standing-wave ratio is by being arranged on described aperiodic materials and described microwave heating equipment
Between transmittance plate be adjusted.
Further, by regulating the distance between described transmittance plate and described aperiodic materials, adjusting standing wave ratio to 2 with
Under.
Described transmittance plate includes second medium plate and is evenly spaced in the sheet metal on described second medium plate.
In step 3, described microwave heating equipment is aerial radiation heater.
Preferably, described microwave heating equipment is electromagnetic horn radiant heating device.
Preferably, described microwave heating equipment is the helical antenna radiant heating device that merit divides radiation integrated.
Compared with the conventional method, the invention have the benefit that
The aperiodic materials of the present invention can form local, periodic resonance range, strengthens the field that road surface is distributed around
Strong intensity, thus it is greatly increased the thermal losses energy of bituminous paving, improve microwave thermal transformation efficiency, improve the uniform of microwave heating
Property.The bituminous paving microwave in-situ heat regeneration method based on electromagnetism Meta Materials of the present invention is to the heating recovery of asphalt again
Utilization is significant.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the present invention is conducted further description.
Fig. 1 is that a kind of based on electromagnetism Meta Materials the bituminous paving microwave of the present invention heats schematic diagram on the spot；Wherein, a is
Bituminous paving, b is aperiodic materials, and c is transmittance plate, and d is microwave heating equipment；
Fig. 2 is the structural representation of the aperiodic materials that structure is planar spiral-type of a kind of resonant ring of the present invention；
Fig. 3 is the aperiodic materials structural representation that structure is Stepped Impedance type of a kind of resonant ring of the present invention；
Fig. 4 is a kind of based on electromagnetism Meta Materials the Colophonium microwave heating schematic diagram of the present invention；Wherein, b is resonant ring
Structure is the aperiodic materials of planar spiral-type, and c is transmittance plate, and d is electromagnetic horn radiant heating device；
Fig. 5 is the body loss density scattergram after the bituminous surface microwave heating based on electromagnetism Meta Materials of the present invention；Its
In, a-quadrant represents the region that electromagnetic energy is strong；
Fig. 6 is the test effect figure of the contrast test 1 in the embodiment of the present invention；
Fig. 7 is the test effect figure of the contrast test 2 in the embodiment of the present invention；
Fig. 8 is the test effect figure of the contrast test 3 in the embodiment of the present invention；
Fig. 9 is a kind of based on electromagnetism Meta Materials the Colophonium microwave heating schematic diagram of the present invention；Wherein, b is resonant ring
Structure is the aperiodic materials of planar spiral-type, and c is transmittance plate, and d is that merit divides the helical antenna radiation of radiation integrated to add hot charging
Put；
Figure 10 is the structural representation that a kind of merit of the present invention divides the helical antenna radiant heating device of radiation integrated, figure
In: 1, magnetron；101, antenna cap one end of magnetron；2, metallic cavity；3, coupling round platform；4, helical antenna；401, metal
Connecting rod；5, supporting leg；6, through hole；7, cylinder is supported；
Figure 11 is that a kind of merit of the embodiment of the present invention divides the helical antenna radiant heating device of radiation integrated to try Colophonium
The body loss density scattergram on asphalt test piece surface after part heating, wherein, volume loss den is body loss density, 0,
100,200 is the scale of schematic diagram, and A is heating concentrated area；
Figure 12 is that a kind of electromagnetic horn radiant heating device of the embodiment of the present invention is to asphalt test piece after asphalt test piece heating
The body loss density scattergram on surface, wherein, volume loss den is body loss density, and 0,100,200 is the mark of schematic diagram
Chi, A is heating concentrated area；
Figure 13 is that a kind of merit of the embodiment of the present invention divides the helical antenna radiant heating device of radiation integrated to try Colophonium
Body loss density scattergram within asphalt test piece after part heating, wherein, volume loss den is body loss density, 0,
100,200 is the scale of schematic diagram, and A is heating concentrated area；
Figure 14 is that a kind of electromagnetic horn radiant heating device of the embodiment of the present invention is to asphalt test piece after asphalt test piece heating
Internal body loss density scattergram, wherein, volume loss den is body loss density, and 0,100,200 is the mark of schematic diagram
Chi, A is heating concentrated area；
Figure 15 is that a kind of merit of the embodiment of the present invention divides the helical antenna radiant heating device of radiation integrated to try Colophonium
The three dimension temperature solid scattergram of asphalt test piece after part heating；
Figure 16 is that a kind of electromagnetic horn radiant heating device of the embodiment of the present invention is to asphalt test piece after asphalt test piece heating
Three dimension temperature solid scattergram.
Detailed description of the invention
The method scheme of the present invention is clearly and completely described by the accompanying drawing below in conjunction with the embodiment of the present invention, aobvious
So, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the reality in the present invention
Execute example, the every other embodiment that this area commonsense method personnel are obtained under not making creative work premise, all belong to
In the scope of protection of the invention.
The invention provides a kind of bituminous paving microwave heating means on the spot based on electromagnetism Meta Materials, including following step
Rapid:
Step 1, design cycle property material: uniform period arrangement resonant ring on the two dimensional surface of first medium plate, to obtain final product；
Step 2, is placed on described aperiodic materials on bituminous paving, described aperiodic materials and described bituminous paving shape
Become electromagnetism Meta Materials；
Step 3, then above described aperiodic materials, place microwave heating equipment, adjusting standing wave ratio to less than 2, to drip
Blue or green road surface is heated on the spot.
Embodiment 1
It is that a kind of bituminous paving microwave based on electromagnetism Meta Materials heats schematic diagram, periodically material on the spot with reference to Fig. 1, Fig. 1
Material is directly placed on bituminous paving, forms electromagnetism Meta Materials, then uses microwave heating equipment to heat it on the spot, thus
Reach soft pitch, and then carry out the purpose of asphalt heat recycling.
The electromagnetism Meta Materials of the present invention has suction ripple and the characteristic of resonance, the electromagenetic wave radiation of specific wavelength to its wavelength
On the electromagnetism Meta Materials that size is corresponding, strong " constraint field " can be produced, the energy of electromagnetic radiation " be fettered " and surpasses at electromagnetism
Near material, make emittance will not continue to propagate along the ground of infinite uniform, thus major part emittance is stayed 5 lis
Colophonium about meter has active layer.
Meanwhile, with reference to Fig. 2, Fig. 3, Fig. 2 is the structural representation of the aperiodic materials that structure is planar spiral-type of resonant ring
Figure, Fig. 3 is the structural representation of the aperiodic materials that structure is Stepped Impedance type of resonant ring；The electromagnetism Meta Materials tool of the present invention
There is two dimensional surface periodically, the uniformity of radiation can be improved further, formed all at the heating region being covered with electromagnetism Meta Materials
Even electromagenetic wave radiation.
Specifically,
The operating frequency of the present embodiment is 2.45GHz, and in aperiodic materials, the structure of resonant ring is planar spiral-type, in 6
× 6 array period arrangements, the size of integral cycle material is 300mm × 300mm, and the size of each construction unit is 50mm
× 50mm, the band number of turns is 6, and strip width is 2mm, and striation widths is 4mm.Stepped Impedance transmission line resonance ring-like periodicity material
Material is also 6 × 6 arrays, and overall dimensions is 300mm × 300mm, and the size of each construction unit is 50mm × 50mm, resonant ring
Strip width is 2mm.
With reference to Fig. 5, a kind of based on electromagnetism Meta Materials the Colophonium microwave heating schematic diagram of the present invention；Wherein, a is resonant ring
The aperiodic materials that structure is planar spiral-type, b is transmittance plate, and c is electromagnetic horn radiant heating device；Wherein transmittance plate bag
Include second medium plate and be evenly spaced in the sheet metal on described second medium plate, and sheet metal is square metal thin slice.Electromagnetism
Ripple is irradiated to metal surface can produce total reflection, and aperiodic materials is hollow out, and form is relevant to wavelength, so electromagnetic wave
It is irradiated to aperiodic materials surface and will produce transmission and resonance phenomena, but still suffer from a part of electromagnetic wave and be reflected back toward
Going, this type of echo belongs to the energy being wasted, and the when that reflected energy being too many, the standing-wave ratio of electromagnetic horn will deteriorate,
In order to make more energy be irradiated to bitumen layer through aperiodic materials, it should make the standing-wave ratio of electromagnetic horn try one's best close to 1,
Standing-wave ratio is preferable areflexia situation equal to 1.Electromagnetic wave has frequency, amplitude and phase characteristic, when two frequencies identical but
The when that to be that the electromagnetic wave of opposite in phase is relevant being superimposed, can make two electromagnetic wave cancellations, the amplitude of two electromagnetic waves is all
Can reduce, thus reduce echo, the present embodiment utilizes the thought that above-mentioned echo is cancelled out each other, regulation transmittance plate and periodicity
Distance between material, the change of electromagnetic wave propagation distance can cause the change of phase place so that it is the echo of transmittance plate and week
It is superimposed the echo opposite in phase of phase property material, reaches cancellation and obtain purpose, thus reduce reflected energy, increase transmission
Energy.
Distance between above-mentioned transmittance plate and aperiodic materials is shown in Table 1 to the relation between electromagnetic horn ground emission effciency,
From the Simulation results of table 1, when the distance between transmittance plate and aperiodic materials is 64mm, standing-wave ratio is 1.5, loudspeaker
The energy emission effciency of antenna is 96%.
Table 1
| d | 60mm | 64mm | 67mm |
| Standing-wave ratio | 2 | 1.5 | 3 |
| Emitted energy efficiency | 0.89 | 0.96 | 0.75 |
Fig. 6 is a kind of based on electromagnetism Meta Materials the Colophonium microwave heating schematic diagram adopting the present invention；Wherein, a is resonant ring
The aperiodic materials that structure is planar spiral-type, b is transmittance plate, and c is helical antenna radiant heating device；Wherein transmittance plate bag
Include second medium plate and be evenly spaced in the sheet metal on described second medium plate, and sheet metal is square metal thin slice.This
Bright used microwave heating equipment is the helical antenna radiant heating device that merit divides radiation integrated, and the radiation of this helical antenna adds
The energy that thermal uses the power division network of a point four to make to radiate is more uniform, can further improve radiation efficiency
Uniformity with heating.
Fig. 5 is the body loss density scattergram after the bituminous surface microwave heating based on electromagnetism Meta Materials of the present invention；Its
In, a-quadrant represents the region that electromagnetic energy is strong；As seen from the figure, in figure, a-quadrant represents the place that electromagnetic energy is strong, it can be seen that
Electromagnetic energy is strapped near electromagnetism metamaterial layer tightly, and the body loss density of bituminous paving is up to 2.275e+002,
The energy efficiency having active layer to absorb through simulation calculation Colophonium is up to 87%.
Carrying out measured test in conjunction with simulation result, the bore of the electromagnetic horn that this enforcement uses is 108mm × 116mm, loudspeaker
Height is 70mm, and distance 30mm of loudspeaker bore to aperiodic materials, the size of aperiodic materials is 200mm × 200mm.For
The effect of more preferable embodiment electromagnetism Meta Materials, the present embodiment takes contrast test, does not change electromagnetic horn radiation and adds hot charging
The power put, does not change the electromagnetic horn radiant heating device distance to Colophonium, does not change heated asphalt material, does not change coating
In the case of emulsion, only changing presence or absence and the density of aperiodic materials, the present embodiment has carried out three kinds of contrast tests, is respectively
Contrast test 1, contrast test 2 and contrast test 3；Wherein, contrast test 1 is that electromagnetic horn radiant heating device is directly to Colophonium
Material heats, and contrast test 2 is to use the sparse aperiodic materials of arrangement and electromagnetic horn radiant heating device to drip
Green material heats, and contrast test 3 is to use arrange denser aperiodic materials and electromagnetic horn radiant heating device pair
Asphalt material heats, and result of the test is as follows:
Fig. 6 is the test effect figure of contrast test 1, as seen from the figure, carries out asphalt material under conditions of contrast test 1
Heating, when heating 5 minutes, asphalt surface starts to produce bubble, and after heating 10 minutes, only the shallow bitumen of asphalt material melts；
Fig. 7 is the test effect figure of contrast test 2, as seen from the figure, heats asphalt material, add under conditions of contrast test 2
3 minutes asphalt surfaces of heat produce thick smoke, and when being heated to 6 minutes, asphalt surface produces naked light, after heating 10 minutes, asphalt surface
Temperature reached 270 DEG C；Fig. 8 is the test effect figure of contrast test 3, as seen from the figure, to drip under conditions of contrast test 3
Green material heats, and creates serious combustion phenomena during heating, and temperature is obviously improved.
Above-mentioned contrast test all uses does not adds the transmittance plate for adjusting standing wave ratio, based on Simulation results
Understand, add the bituminous surface microwave heating based on electromagnetism Meta Materials after the transmittance plate of adjusting standing wave ratio better.
Above-mentioned result of the test shows lay aperiodic materials on the surface of asphalt material and then form electromagnetism Meta Materials, permissible
Net long wave radiation microwave energy, adds the thermal losses energy of bituminous paving, improves microwave thermal transformation efficiency.
Above-mentioned l-G simulation test and measured test use electromagnetism Meta Materials and the high-efficiency heating unit of microwave heating equipment composition
The topological structure of random scale can be formed, it is achieved uniform heating radiation while of large-area, to meet the drip in Practical Project
Blue or green road surface scale, reaches the effect of the most uniformly bituminous paving of heating larger area.
Embodiment 2
The present embodiment additionally provides a kind of merit and divides the helical antenna radiant heating device of radiation integrated, uses this microwave to add
As it is shown in figure 9, wherein, b is the aperiodic materials that structure is planar spiral-type of resonant ring to the heating schematic diagram of thermal, and c is
Transmittance plate, d is the helical antenna radiant heating device that merit divides radiation integrated.
With reference to Figure 10, the merit in the present embodiment divides the helical antenna radiant heating device of radiation integrated, including: magnetron
1, metallic cavity 2, coupling round platform 3 and helical antenna 4；The base plate external of metallic cavity 2 is provided with supporting leg 5；Magnetron 1 is fixed
In the center of the top board of metallic cavity 2, and antenna cap one end 101 of magnetron is from the centre bit of the top board of metallic cavity 2
Putting and put in metallic cavity 2, the other end is connected with external high pressure power supply；Coupling round platform 3 is fixed on the inside ceiling panel of metallic cavity 2
On；One end of helical antenna 4 connects has metal tie rods 401, helical antenna 4 to be positioned at the outside of the base plate of metallic cavity 2, and its
Connect that to have one end of metal tie rods 401 to stretch into metallic cavity 2 by the through hole 6 on metallic cavity 2 base plate internal, and with couple
The center electrical connection of round platform 3, the radius of metal tie rods 401 is less than the radius of through hole 6, and metal tie rods 401 and through hole 6
Hole wall do not contact.Wherein, coupling round platform is multiple, and arranges centered by magnetron 1, helical antenna 4, through hole 6
Number respectively with coupling round platform 3 number consistent；Each medial surface center position of metallic cavity 2 is also vertically arranged with support
Cylinder 7, supports cylinder 7 and is connected with top board and the base plate of metallic cavity 2, and equidistant with magnetron 1；The present embodiment provides
The coupling round platform 3 of microwave heating equipment be 4, its radius is 20～30mm；Helical antenna 4 is rectangle radially helical antenna,
Its line footpath is 1～2mm, and coil turn is 1～1.5, and the radius of spiraltron is 18～24mm, and pitch is 7～9mm；Coupled Circle
Platform 3 distance between any two is 60～100mm；The aperture of through hole 6 is 11～12mm；The radius supporting cylinder 7 is 2～4mm.
The principle that realizes of above-mentioned aerial radiation heater is: external high voltage power supply provides electric energy for magnetron, passes through magnetic
Keyholed back plate converts electric energy to microwave energy, and is transmitted into inside metallic cavity, and coupling round platform is for the microwave energy received
Coupling, and merit gives helical antenna, the microwave energy of coupling to road surface ice sheet, is completed this by last helical antenna
Bright road surface deicing.
Based on above-mentioned principle, in the present invention, the coupling round platform 3 of aerial radiation heater is for the microwave energy received
Amount couples, and therefore, its radius can not be too small, and otherwise coupling round platform 3 will be unable to effective coupling microwaves energy, causes spiral
The energy that antenna 4 obtains is less, it is impossible to effectively carry out microwave energy, to the heats of bituminous paving not
Good.It addition, the radius supporting cylinder 7 is unsuitable excessive, otherwise will affect the coupling round platform 3 coupling to microwave energy, also can
Affect standing-wave ratio.Through hole 6 has been mainly connection effect so that helical antenna 4 can pass through and be connected to couple round platform 3
On, it addition, the energy reflection that through hole 6 can also effectively stop helical antenna 4 to be launched returns metallic cavity 2, thus prevent reflection
The ripple injury to helical antenna 4.
Therefore, the present embodiment is through emulation, and the radius obtaining coupling in the present embodiment round platform 3 is 25mm, couples 3 liang of round platform
Distance between two is 80mm；Helical antenna 4 is rectangle radially helical antenna, and its line footpath is 1.5mm, and coil turn is 1.32,
The radius of spiraltron is 21mm, and pitch is 8.2mm；The aperture of through hole 6 is 11.5mm, and the radius supporting cylinder 7 is 3mm.
Helical antenna in aerial radiation heater is used for the heating of bituminous paving by the present embodiment, to improving Colophonium
The inhomogeneities of road microwave heating.Owing to burden and the characteristic of helical antenna are mainly determined by D/ λ, wherein, D is helical antenna
Diameter, λ is the wavelength corresponding to the resonant frequency of helical antenna.In the present embodiment, the diameter D/ λ controlling helical antenna exists
Between 0.25～0.46, it is ensured that its radiation direction is radially.
The helical antenna radiant heating device that the merit of the present embodiment is divided radiation integrated is used for asphalt test piece (a size of
200×200×50mm3) heating, and contrast with electromagnetic horn radiant heating device, simulation result is as follows:
In simulation process, body loss density can with the loss situation of reflected microwave energy, and then reflection temperature distribution,
Therefore, the body loss density by observing asphalt test piece reflects the Temperature Distribution that asphalt test piece is heated by heater.To this
The merit of embodiment divides the helical antenna radiant heating device of radiation integrated and electromagnetic horn radiant heating device to compare, respectively
Test its to asphalt test piece surface heat after, the body loss density on asphalt test piece surface, result is as shown in Figure 11, Figure 12.
As shown in Figure 11, heating region is 200mm × 200mm, and in heating region, the merit of the present embodiment divides radiation one
After asphalt test piece is heated by the helical antenna radiant heating device changed, the surface of asphalt test piece produces four heating concentrated area A,
Respectively with four helical antenna one_to_one corresponding of the present embodiment, represent loss maximum point 1.8130e+004, the surface of asphalt test piece
Body loss density be 1.295e+003～1.813e+004, the loss of the body on whole asphalt test piece surface is witnessed scattergram and is connected
Completely covers the surface of asphalt test piece, thus reflect in heating process, the surface temperature distribution of asphalt test piece is uniform.
As shown in Figure 12, heating region is similarly 200mm × 200mm, but in heating region, electromagnetic horn radiation heating
After asphalt test piece is heated by device, asphalt test piece only producing a heating concentrated area A, the body on the surface of asphalt test piece damages
Consumption density is 6.6376e+001～1.0619e+003, divides the helical antenna of radiation integrated to radiate compared to the merit of the present embodiment
Heater, heating region is significantly smaller, and heats uneven.
Meanwhile, merit to embodiment divides helical antenna radiant heating device and the electromagnetic horn radiation of radiation integrated respectively
Body loss density distribution within asphalt test piece after asphalt test piece heating is tested by heater, result such as Figure 13, figure
Shown in 14.Wherein, Figure 13 is that the merit of the present embodiment divides the helical antenna radiant heating device of radiation integrated to add asphalt test piece
Body loss density scattergram within asphalt test piece after heat, Figure 14 is after asphalt test piece is heated by electromagnetic horn radiant heating device
Body loss density scattergram within asphalt test piece.As shown in Figure 13, heating region is 200mm × 200mm, at heating region
In, after the merit of the present embodiment divides the helical antenna radiant heating device of radiation integrated to heat asphalt test piece, asphalt test piece table
Face produces four heating concentrated area A, corresponding four helical antenna radiation directions, and four heating concentrated areas couple together, micro-
Wave radiation energy is filled with the inside of whole asphalt test piece, its body loss density value from 8.0000e+002～5.7143e+001,
It is full of inside whole asphalt test piece, microwave energy be described in the loss within test specimen uniformly, to uniformly adding thermal effect within test specimen
Fruit is preferably.As shown in Figure 14, heating region is 200mm × 200mm, in heating region, and electromagnetic horn radiant heating device pair
After asphalt test piece heating, asphalt test piece surface only produces a heating concentrated area A, and the whole Colophonium of microwave energy underfill
The inside of test specimen, its body loss density value can not be filled completely from 6.6376e+001～1.0619e+003, the distribution of body loss density
The inside of full whole asphalt test piece, but only it is distributed in the lower section of heating concentrated area A, the inside of asphalt test piece is heated not
All.
(2) merit of the present embodiment is divided the helical antenna radiant heating device of radiation integrated be used for bituminous paving heating,
And contrast with electromagnetic horn radiant heating device, measured result is as follows:
Figure 15 is after the merit of the present embodiment divides the helical antenna radiant heating device of radiation integrated to heat asphalt test piece
The three dimension temperature solid scattergram of asphalt test piece, as shown in Figure 15, merit divides the helical antenna radiant heating device of radiation integrated
After asphalt test piece is heated, produce four radiation areas, and the temperature of four radiation areas is all more than 200 DEG C, minimum temperature
Being 116 DEG C, mean temperature reaches about 150 DEG C, has reached the temperature required for Colophonium softens, Colophonium can be made to soften completely.
Figure 16 is the three dimension temperature solid distribution of asphalt test piece after asphalt test piece is heated by electromagnetic horn radiant heating device
Figure, as seen from the figure, after asphalt test piece is heated by electromagnetic horn radiant heating device, the maximum temperature of radiation areas is 91.9 DEG C,
Mean temperature only has about 60 DEG C, it is impossible to reach the temperature that Colophonium softens, it is impossible to make Colophonium soften completely, it follows that merit is divided
The helical antenna radiant heating device of radiation integrated to the heats of Colophonium substantially than electromagnetic horn radiant heating device pair
The heats of Colophonium is good.
Being shown by concrete experiment, in the case of same magnetron source, merit divides the helical antenna of radiation integrated
Radiant heating device to the heated perimeter of asphalt test piece the chances are electromagnetic horn radiant heating device to asphalt test piece heated perimeter
About one times；Merit divides the helical antenna radiant heating device of radiation integrated by carrying out a certain degree of to the energy assembled
Merit is divided so that it has wider array of effective " hot-zone " under the same area；Merit divides the helical antenna radiation heating of radiation integrated
After asphalt test piece is heated by device, the temperature on whole asphalt test piece surface reaches 200 DEG C, and mean temperature reaches 150 DEG C, after heating
Colophonium can easily be opened by plane, it addition, use the merit of the present embodiment to divide the helical antenna radiant heating device of radiation integrated
After heating bituminous paving with electromagnetic horn radiant heating device, heat penetration is substantially suitable, is each about 50mm；And electromagnetic horn
After radiant heating device heating, only in the radiation areas of electromagnetic horn, the degree of depth that plane leaves has reached 50mm, peripheral part temperature
Degree only about 60 DEG C, does not soften, does not meets the requirement of bitumen recovery, and the merit of the present embodiment divides the spiral of radiation integrated
After Colophonium is heated by aerial radiation heater, Colophonium entirety can easily be cast aside, and the effect of heating is preferable.
Above Simulation results and measured result all may indicate that the merit of the present embodiment divides the spiral sky of radiation integrated
Beta radiation heater divides by focused energy is carried out rational merit, can meet asphalt mixture heating energy requirement
Meanwhile, add " hot-zone " area, improve homogeneous heating degree.
From the result of the test of above example, the present invention uses merit to divide the helical antenna radiation heating of radiation integrated
Device carries out effect that microwave heats on the spot better than employing electromagnetic horn radiant heating device certainly to bituminous paving.
In sum, present invention bituminous paving based on electromagnetism Meta Materials microwave heating means on the spot, improving microwave spoke
Penetrate heating uniformity and improve the effect that the generation of Net long wave radiation efficiency aspect is huge.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
It is familiar with the method personnel in this method field in the range of the method that the invention discloses, change can be readily occurred in or replace, such as conversion
The structure type of resonant ring in aperiodic materials, but as long as it can form resonance at the operating frequencies, all should contain at this
Within bright protection domain, the most such as conversion microwave heating equipment or the method etc. of conversion adjusting standing wave ratio.Therefore, the present invention
Protection domain should be as the criterion with described scope of the claims.
Claims (10)
1. bituminous paving microwave heating means on the spot based on electromagnetism Meta Materials, it is characterised in that comprise the following steps:
Step 1, design cycle property material: uniform period arrangement resonant ring on the two dimensional surface of first medium plate, to obtain final product；
Step 2, is placed on described aperiodic materials on bituminous paving, and described aperiodic materials and described bituminous paving form electricity
Magnetic Meta Materials；
Step 3, then above described aperiodic materials, place microwave heating equipment, adjusting standing wave ratio to less than 2, to asphalt road
Face is heated on the spot.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levying and be, in step 1, described resonant ring is metal resonant ring.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levying and be, in step 1, the structure of described resonant ring is planar spiral-type.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levying and be, in step 1, the structure of described resonant ring is micro-strip Stepped Impedance type.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levy and be, in step 3, the regulation of described standing-wave ratio be by be arranged on described aperiodic materials and described microwave heating equipment it
Between transmittance plate be adjusted.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 5, it is special
Levy and be, by regulating the distance between described transmittance plate and described aperiodic materials, adjusting standing wave ratio to less than 2.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 5, it is special
Levying and be, described transmittance plate includes second medium plate and is evenly spaced in the sheet metal on described second medium plate.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levying and be, in step 3, described microwave heating equipment is aerial radiation heater.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levying and be, in step 3, described microwave heating equipment is electromagnetic horn radiant heating device.
Bituminous paving microwave in-situ heat regeneration heating means based on electromagnetism Meta Materials the most according to claim 1, it is special
Levying and be, in step 3, described microwave heating equipment is the helical antenna radiant heating device that merit divides radiation integrated.
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| CN107190606A (en) * | 2017-06-19 | 2017-09-22 | 东南大学 | A kind of multifunction road cover structure heated beneficial to microwave |
| CN108477972A (en) * | 2018-04-11 | 2018-09-04 | 西安电子科技大学 | Micro-wave oven rice cooker based on microwave Meta Materials |
| CN110196267A (en) * | 2019-05-13 | 2019-09-03 | 安徽建筑大学 | A kind of test method of the infrared road detection apparatus based on transmitting electromagnetism or microwave |
| WO2021119857A1 (en) * | 2019-12-19 | 2021-06-24 | Pontificia Universidad Católica De Chile | Device for the repair of cracks in asphalt road surfaces by means of microwaves which increase the temperature of the asphalt form the surface downwards, bringing about the self-repair of the material with minimal intervention |
| CN114104298A (en) * | 2021-11-26 | 2022-03-01 | 山东大学 | Airplane deicing and anti-icing device and method based on microwave orientation technology |
| CN114665242A (en) * | 2022-04-06 | 2022-06-24 | 湖南大学 | Device and method for improving electromagnetic field uniformity in microwave cavity by using adjustable artificial magnetic conductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108477972A (en) * | 2018-04-11 | 2018-09-04 | 西安电子科技大学 | Micro-wave oven rice cooker based on microwave Meta Materials |
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| WO2021119857A1 (en) * | 2019-12-19 | 2021-06-24 | Pontificia Universidad Católica De Chile | Device for the repair of cracks in asphalt road surfaces by means of microwaves which increase the temperature of the asphalt form the surface downwards, bringing about the self-repair of the material with minimal intervention |
| CN114104298A (en) * | 2021-11-26 | 2022-03-01 | 山东大学 | Airplane deicing and anti-icing device and method based on microwave orientation technology |
| CN114104298B (en) * | 2021-11-26 | 2023-12-22 | 山东大学 | Aircraft deicing device and method based on microwave orientation technology |
| CN114665242A (en) * | 2022-04-06 | 2022-06-24 | 湖南大学 | Device and method for improving electromagnetic field uniformity in microwave cavity by using adjustable artificial magnetic conductor |
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