CN106192712B - Bituminous paving microwave based on electromagnetism Meta Materials heating means on the spot - Google Patents
Bituminous paving microwave based on electromagnetism Meta Materials heating means on the spot Download PDFInfo
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- CN106192712B CN106192712B CN201610584534.2A CN201610584534A CN106192712B CN 106192712 B CN106192712 B CN 106192712B CN 201610584534 A CN201610584534 A CN 201610584534A CN 106192712 B CN106192712 B CN 106192712B
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- heating
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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
Abstract
The present invention relates to the microwave heating method of bituminous paving, a kind of bituminous paving microwave based on electromagnetism Meta Materials heating means on the spot are specifically disclosed, are included the following steps：Step 1, design cycle property material：On the two dimensional surface of first medium plate uniform period arrangement resonant ring to get；Step 2, the aperiodic materials are placed on bituminous paving, the aperiodic materials form electromagnetism Meta Materials with the road surface；Step 3, microwave heating equipment then in the top of the aperiodic materials is placed, adjusts standing-wave ratio to 2 hereinafter, being heated on the spot to bituminous paving.Aperiodic materials of the present invention can form local, periodic resonance range, reinforce the field strength that bituminous paving is distributed around, and increase heat waste energy consumption, improve microwave thermal transformation efficiency, improve the uniformity of microwave heating.The present invention is of great significance to the heating recovery recycling of asphalt.
Description
Method field
The present invention relates to the microwave heating method of bituminous paving, more 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 attracts attention.It mostly uses at present
Open fire, infrared method or microwave method heat bituminous paving on the spot, make its softening in favor of washing plane recycling,
The in-situ heat regeneration of asphalt is conducive to waste disposal, resource-effective and environmental protection, economic benefit and social valence
Value is very considerable.
Heating to existing bituminous paving is one of the key method of pitch in-situ heat regeneration.Bituminous paving is carrying out heat again
It must heat before death, lower fuel can be consumed in a short time, be heated to required temperature, could be used for
Hot recycling；Heating temperature is too low, road surface softening degree not enough, pine should not be harrowed, and it is too low to lead to mix and stir temperature, influences product matter
Amount；Conversely, heating temperature is too high, Bituminous concrete surface is easy to decompose, and leads to aging, the coking of pitch, final influence asphalt
Pavement performance.In a variety of heat sources and mode of heating, microwave heating has many advantages, such as that heating speed is fast, penetration capacity is strong,
The phenomenon for avoiding pitch aging and heating unevenness caused by by excessive heat, also effectively prevents due to asphalt component
Volatilization and caused by problem of environmental pollution.
In recent years, researcher further improves microwave and adds by way of spraying blended emulsifier in bituminous paving
The efficiency of heat, substantially reduces the working time so that extensive maintenance of surface is spread again to be possibly realized.But microwave heats on the spot
In bituminous paving method, however it remains many difficult points mainly have the disadvantages such as penetration depth is excessive, thermal transition efficiency is low, these are tight
Industrialized development is constrained again.
Invention content
The problem of for existing method, the purpose of the present invention is to provide a kind of electromagnetism Meta Materials bituminous paving is micro-
Wave heating means on the spot increase the heat waste energy consumption of bituminous paving, improve microwave thermal transformation efficiency.
In order to achieve the above object, the present invention is achieved using following methods scheme.
A kind of bituminous paving microwave based on electromagnetism Meta Materials heating means on the spot, which is characterized in that include the following steps：
Step 1, design cycle property material：On the two dimensional surface of first medium plate uniform period arrangement resonant ring to get；
Step 2, the aperiodic materials are placed on bituminous paving, the aperiodic materials and the bituminous paving shape
At electromagnetism Meta Materials；
Step 3, microwave heating equipment then in the top of the aperiodic materials is placed, adjusts standing-wave ratio to 2 hereinafter, to drip
It is heated on the spot on green road surface.
It the features of the present invention and is further improved to：
In step 1, the resonant ring is metal resonant ring.
In step 1, the structure of the resonant ring is planar spiral-type.
In step 1, the structure of the resonant ring is micro-strip Stepped Impedance type.
In step 3, the adjusting of the standing-wave ratio is by being arranged in the aperiodic materials and the microwave heating equipment
Between transmittance plate be adjusted.
Further, by adjust the distance between the transmittance plate and the aperiodic materials, adjusting standing-wave ratio to 2 with
Under.
The transmittance plate includes second medium plate and the sheet metal that is evenly spaced on the second medium plate.
In step 3, the microwave heating equipment is aerial radiation heating device.
Preferably, the microwave heating equipment is electromagnetic horn radiant heating device.
Preferably, the microwave heating equipment is the helical antenna radiant heating device that work(divides radiation integrated.
Compared with the conventional method, beneficial effects of the present invention are：
The aperiodic materials of the present invention can form local, periodic resonance range, reinforce the field that road surface is distributed around
Intensity improves microwave thermal transformation efficiency, improves the uniform of microwave heating to greatly increase the heat waste energy consumption of bituminous paving
Property.The bituminous paving microwave in-situ heat regeneration method based on electromagnetism Meta Materials of the present invention to the heating recovery of asphalt again
Using being of great significance.
Description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is that a kind of bituminous paving microwave based on electromagnetism Meta Materials of the present invention heats schematic diagram on the spot；Wherein, a is
Bituminous paving, b are aperiodic materials, and c is transmittance plate, and d is microwave heating equipment；
Fig. 2 is the structural schematic diagram that a kind of structure of resonant ring of the present invention is the aperiodic materials of planar spiral-type；
Fig. 3 is that a kind of structure of resonant ring of the present invention is the aperiodic materials structural schematic diagram of Stepped Impedance type；
Fig. 4 is a kind of pitch microwave heating schematic diagram based on electromagnetism Meta Materials 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 distribution map after the bituminous surface microwave heating based on electromagnetism Meta Materials of the present invention；Its
In, a-quadrant represents the strong region of electromagnetic energy；
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 pitch microwave heating schematic diagram based on electromagnetism Meta Materials 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 work(divides the helical antenna radiant heating of radiation integrated to fill
It sets；
Figure 10 is the structural schematic diagram that a kind of work(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, metal cavity；3, round platform is coupled；4, helical antenna；401, metal
Connecting rod；5, support leg；6, through-hole；7, cylinder is supported；
Figure 11 is that a kind of work(of the embodiment of the present invention divides the helical antenna radiant heating device of radiation integrated to try pitch
Part heating after asphalt test piece surface body loss density distribution map, wherein volume loss den be body loss density, 0,
100,200 be schematic diagram scale, A be heating concentrated area；
Figure 12 is asphalt test piece after a kind of electromagnetic horn radiant heating device of the embodiment of the present invention heats asphalt test piece
The body loss density distribution map on surface, wherein volume loss den are body loss density, and 0,100,200 be the mark of schematic diagram
Ruler, A are heating concentrated area；
Figure 13 is that a kind of work(of the embodiment of the present invention divides the helical antenna radiant heating device of radiation integrated to try pitch
Body loss density distribution map after part heating inside asphalt test piece, wherein volume loss den are body loss density, 0,
100,200 be schematic diagram scale, A be heating concentrated area；
Figure 14 is asphalt test piece after a kind of electromagnetic horn radiant heating device of the embodiment of the present invention heats asphalt test piece
Internal body loss density distribution map, wherein volume loss den are body loss density, and 0,100,200 be the mark of schematic diagram
Ruler, A are heating concentrated area；
Figure 15 is that a kind of work(of the embodiment of the present invention divides the helical antenna radiant heating device of radiation integrated to try pitch
The three dimension temperature solid distribution map of asphalt test piece after part heating；
Figure 16 is asphalt test piece after a kind of electromagnetic horn radiant heating device of the embodiment of the present invention heats asphalt test piece
Three dimension temperature solid distribution map.
Specific implementation mode
The method scheme of the present invention is clearly and completely described below in conjunction with the attached drawing of the embodiment of the present invention, is shown
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, the every other embodiment that this field commonsense method personnel are obtained without making creative work all belongs to
In the scope of protection of the invention.
The present invention provides a kind of heating means, including following step on the spot of the bituminous paving microwave based on electromagnetism Meta Materials
Suddenly：
Step 1, design cycle property material：On the two dimensional surface of first medium plate uniform period arrangement resonant ring to get；
Step 2, the aperiodic materials are placed on bituminous paving, the aperiodic materials and the bituminous paving shape
At electromagnetism Meta Materials；
Step 3, microwave heating equipment then in the top of the aperiodic materials is placed, adjusts standing-wave ratio to 2 hereinafter, to drip
It is heated on the spot on green road surface.
Embodiment 1
With reference to figure 1, Fig. 1 is that a kind of bituminous paving microwave based on electromagnetism Meta Materials heats schematic diagram, periodical material on the spot
Material is directly placed on bituminous paving, forms electromagnetism Meta Materials, then heated on the spot to it using microwave heating equipment, to
Reach soft pitch, and then carries out the purpose of asphalt heat recycling.
The electromagnetism Meta Materials of the present invention have a characteristic for inhaling wave and resonance, the electromagenetic wave radiation of specific wavelength to its wavelength
On the corresponding electromagnetism Meta Materials of size, it will produce strong " constraint field ", the energy " constraint " of electromagnetic radiation is super in electromagnetism
Near material, radiation energy is made not continue to propagate along the ground of infinite uniform, to which most of radiation energy is stayed in 5 lis
The pitch of rice or so has active layer.
Meanwhile with reference to the structural representation for the aperiodic materials that the structure that figure 2, Fig. 3, Fig. 2 are resonant ring is planar spiral-type
Figure, Fig. 3 is the structural schematic diagram that the structure of resonant ring is the aperiodic materials of Stepped Impedance type；The electromagnetism Meta Materials tool of the present invention
There is two dimensional surface periodical, can further improve the uniformity of radiation, be formed in the heating region for being covered with electromagnetism Meta Materials
Even electromagenetic wave radiation.
Specifically,
The working frequency of the present embodiment is 2.45GHz, and the structure of resonant ring is planar spiral-type in aperiodic materials, is in 6
× 6 array periods are arranged, and the size of integral cycle material is 300mm × 300mm, and the size of each structural unit is 50mm
× 50mm, the band number of turns are 6, and strip width 2mm, band spacing is 4mm.The ring-like periodical material of Stepped Impedance transmission line resonance
Material is also 6 × 6 arrays, and overall dimensions are 300mm × 300mm, and the size of each structural unit is 50mm × 50mm, resonant ring
Strip width is 2mm.
With reference to figure 5, a kind of pitch microwave heating schematic diagram based on electromagnetism Meta Materials of the invention；Wherein, a is resonant ring
Structure be planar spiral-type aperiodic materials, b is transmittance plate, and c is electromagnetic horn radiant heating device；Wherein transmittance plate packet
The sheet metal for including second medium plate and being evenly spaced on the second medium plate, and sheet metal is square metal thin slice.Electromagnetism
Wave is irradiated to metal surface and will produce total reflection, and aperiodic materials are hollow outs, and form is related to wavelength, so electromagnetic wave
It is irradiated to aperiodic materials surface and just will produce transmission and resonance phenomena, but still suffer from a part of electromagnetic wave and be reflected back toward
It going, such back wave belongs to the energy being wasted, and when reflected energy is 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 as possible close to 1,
It is ideal areflexia situation that standing-wave ratio, which is equal to 1,.Electromagnetic wave has frequency, amplitude and phase characteristic, when two frequencies are identical but
Be opposite in phase electromagnetic wave it is relevant when be superimposed, two electromagnetic wave cancellations can be made, the amplitude of two electromagnetic waves is all
It can reduce, to reduce back wave, the thought that the present embodiment is cancelled out each other using above-mentioned back wave adjusts transmittance plate and periodicity
The distance between material, the change of electromagnetic wave propagation distance can cause the change of phase, make back wave and the week of its transmittance plate
It is superimposed to the back wave opposite in phase of phase property material, reaches cancellation and obtain purpose, to reduce reflected energy, increase transmission
Energy.
The relationship of the distance between above-mentioned transmittance plate and aperiodic materials to electromagnetic horn between emission effciency is shown in Table 1,
By the Simulation results of table 1 it is found that when the distance between transmittance plate and aperiodic materials are 64mm, standing-wave ratio 1.5, loudspeaker
The energy transmitting efficiency 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 pitch microwave heating schematic diagram based on electromagnetism Meta Materials for adopting the present invention；Wherein, a is resonant ring
Structure be planar spiral-type aperiodic materials, b is transmittance plate, and c is helical antenna radiant heating device；Wherein transmittance plate packet
The sheet metal for including second medium plate and being evenly spaced on the second medium plate, and sheet metal is square metal thin slice.This hair
Microwave heating equipment used in bright is the helical antenna radiant heating device that work(divides radiation integrated, and helical antenna radiation adds
Thermal keeps the energy radiated more uniform using one point four of power division network, can further improve radiation efficiency
With the uniformity of heating.
Fig. 5 is the body loss density distribution map after the bituminous surface microwave heating based on electromagnetism Meta Materials of the present invention；Its
In, a-quadrant represents the strong region of electromagnetic energy；As seen from the figure, a-quadrant represents the strong place of electromagnetic energy in figure, it can be seen that
Electromagnetic energy is tightly strapped near electromagnetism metamaterial layer, and the body loss density of bituminous paving is up to 2.275e+002,
The energy efficiency for having active layer to absorb through simulation calculation pitch is up to 87%.
Measured test is carried out in conjunction with simulation result, the bore for the electromagnetic horn that this implementation uses is 108mm × 116mm, loudspeaker
Height is 70mm, and the size of the distance 30mm of bell mouth diameter to aperiodic materials, aperiodic materials are 200mm × 200mm.For
The better effect for embodying electromagnetism Meta Materials, the present embodiment take contrast test, do not change electromagnetic horn radiant heating dress
The power set does not change electromagnetic horn radiant heating device to the distance of pitch, does not change heated asphalt material, do not change coating
In the case of lotion, only changes the presence or absence of aperiodic materials and density, the present embodiment have carried out three kinds of contrast tests, respectively
Contrast test 1, contrast test 2 and contrast test 3；Wherein, contrast test 1 is electromagnetic horn radiant heating device directly to pitch
Material is heated, and contrast test 2 is using arrange sparse aperiodic materials and electromagnetic horn radiant heating device to drip
Green material is heated, and contrast test 3 is using the denser aperiodic materials and electromagnetic horn radiant heating device pair of arranging
Asphalt material is heated, and test result is as follows：
Fig. 6 is the test effect figure of contrast test 1, as seen from the figure, is carried out to asphalt material under conditions of contrast test 1
Heating, asphalt surface starts to generate bubble when heating 5 minutes, and after ten minutes, only the shallow bitumen of asphalt material melts for heating；
Fig. 7 is that the test effect figure of contrast test 2 heats asphalt material under conditions of contrast test 2, add as seen from the figure
Hot 3 minutes asphalt surfaces produce thick smoke, and when being heated to 6 minutes, asphalt surface generates open fire, heat after ten 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 is heated, and when heating produces serious combustion phenomena, and temperature is obviously improved.
What above-mentioned contrast test was all made of is the transmittance plate not added for adjusting standing-wave ratio, is based on Simulation results
It is found that the bituminous surface microwave heating based on electromagnetism Meta Materials after transmittance plate of the addition for adjusting standing-wave ratio is better.
Above-mentioned test result shows to be laid with aperiodic materials on the surface of asphalt material and then forms electromagnetism Meta Materials, can be with
Net long wave radiation microwave energy increases the heat waste energy consumption of bituminous paving, improves microwave thermal transformation efficiency.
The high-efficiency heating unit that above-mentioned l-G simulation test and measured test are formed using electromagnetism Meta Materials and microwave heating equipment
The topological structure of random scale can be formed, radiation is evenly heated while realizing large area, to meet the drip in Practical Project
Green road surface scale, achievees the effect that while being evenly heated the bituminous paving of larger area.
Embodiment 2
The present embodiment additionally provides the helical antenna radiant heating device that a kind of work(divides radiation integrated, is added using the microwave
The heating schematic diagram of thermal is as shown in Figure 9, wherein b is that the structure of resonant ring is the aperiodic materials of planar spiral-type, and c is
Transmittance plate, d are the helical antenna radiant heating device that work(divides radiation integrated.
With reference to figure 10, the work(in the present embodiment divides the helical antenna radiant heating device of radiation integrated, including：Magnetron
1, metal cavity 2, coupling round platform 3 and helical antenna 4；The base plate external of metal cavity 2 is provided with support leg 5；Magnetron 1 is fixed
In the center of the top plate of metal cavity 2, and antenna cap one end 101 of magnetron is from the centre bit of the top plate of metal cavity 2
It sets and puts in metal cavity 2, the other end is connect with external high pressure power supply；Coupling round platform 3 is fixed on the inner top panel of metal cavity 2
On；One end of helical antenna 4 is connected with metal tie rods 401, and helical antenna 4 is located at the outside of the bottom plate of metal cavity 2, and its
The one end for being connected with metal tie rods 401 is stretched by the through-hole 6 on 2 bottom plate of metal cavity inside metal cavity 2, and with couple
It is electrically connected at the center 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 be not in contact.Wherein, coupling round platform is multiple, and is arranged centered on magnetron 1, helical antenna 4, through-hole 6
Number respectively with coupling the number of round platform 3 it is consistent；Each medial surface center position of metal cavity 2 is also vertically arranged with support
Cylinder 7, support cylinder 7 are connected with the top plate of metal cavity 2 and bottom plate, and equidistant with magnetron 1；The present embodiment provides
Microwave heating equipment coupling round platform 3 be 4, radius be 20~30mm；Helical antenna 4 is rectangle radial direction helical antenna,
Its line footpath is 1~2mm, and coil turn is 1~1.5, and the radius of spiraltron is 18~24mm, and screw pitch is 7~9mm；Coupled Circle
The distance of platform 3 between any two is 60~100mm；The aperture of through-hole 6 is 11~12mm；It is 2~4mm to support the radius of cylinder 7.
The realization principle of above-mentioned aerial radiation heating device 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 emitted to inside metal cavity, and coupling round platform is used for the microwave energy to receiving
It is coupled, and work(gives helical antenna, the microwave energy of coupling to road surface ice sheet, is completed this hair by last helical antenna
Bright road surface deicing.
Based on above-mentioned principle, the coupling round platform 3 of aerial radiation heating device is used for the microwave energy to receiving in the present invention
Amount is coupled, and therefore, radius cannot be too small, is otherwise coupled round platform 3 and be will be unable to effective coupling microwaves energy, leads to spiral
The energy that antenna 4 obtains is smaller, and microwave energy cannot be effectively performed, so that not to the heating effect of bituminous paving
It is good.In addition, the radius of support cylinder 7 should not be too large, it otherwise will influence to couple coupling of the round platform 3 to microwave energy, also can
Influence standing-wave ratio.Through-hole 6 has been mainly connection effect so that helical antenna 4 can pass through and be connected to coupling round platform 3
On, in addition, through-hole 6, which also can effectively prevent the energy that helical antenna 4 is launched, is reflected back metal cavity 2, to prevent reflecting
Injury of the wave to helical antenna 4.
Therefore, for the present embodiment by emulation, the radius for obtaining coupling round platform 3 in the present embodiment is 25mm, couples 3 liang of round platform
The distance between two be 80mm；Helical antenna 4 be rectangle radial direction helical antenna, line footpath 1.5mm, coil turn 1.32,
The radius of spiraltron is 21mm, screw pitch 8.2mm；The aperture of through-hole 6 is 11.5mm, and the radius of support cylinder 7 is 3mm.
Helical antenna in aerial radiation heating device is used for the heating of bituminous paving by the present embodiment, to improve pitch
The inhomogeneities of road microwave heating.Since the burden and characteristic of helical antenna are mainly determined by D/ λ, wherein D is helical antenna
Diameter, λ be helical antenna resonant frequency corresponding to wavelength.In the present embodiment, the diameter D/ λ for controlling helical antenna exist
Between 0.25~0.46, ensure its radiation direction radially.
Dividing the helical antenna radiant heating device of radiation integrated to be used for the work(of the present embodiment, (size is to asphalt test piece
200×200×50mm3) heating, and compared with electromagnetic horn radiant heating device, simulation result is as follows：
In simulation process, body loss density can be with the loss situation of reflected microwave energy, and then reflects the distribution of temperature,
Therefore, reflect Temperature Distribution that heating device heats asphalt test piece by observing the body loss density of asphalt test piece.It incite somebody to action this
The work(of embodiment divides the helical antenna radiant heating device of radiation integrated and electromagnetic horn radiant heating device to compare, respectively
After it is tested to the heating of asphalt test piece surface, the body loss density on asphalt test piece surface, as a result as shown in Figure 11, Figure 12.
As shown in Figure 11, heating region is 200mm × 200mm, in heating region, the work(point radiation one of the present embodiment
After the helical antenna radiant heating device of change heats asphalt test piece, the surface of asphalt test piece generates four heating concentrated area A,
It is corresponded respectively with four helical antennas of the present embodiment, represents loss maximum point 1.8130e+004, the surface of asphalt test piece
Body loss density be 1.295e+003~1.813e+004, the body loss on entire asphalt test piece surface is witnessed distribution map and is connected
The surface of asphalt test piece is completely covered, to 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 radiant heating
After device heats asphalt test piece, a heating concentrated area A, the body damage on the surface of asphalt test piece are only produced in asphalt test piece
Consumption density is 6.6376e+001~1.0619e+003, and the work(compared to the present embodiment divides the helical antenna of radiation integrated to radiate
Heating device, heating region is significantly smaller, and heats uneven.
Meanwhile the helical antenna radiant heating device of radiation integrated and electromagnetic horn is divided to radiate the work(of embodiment respectively
Body loss density distribution after heating device heats asphalt test piece inside asphalt test piece is tested, as a result such as Figure 13, figure
Shown in 14.Wherein, Figure 13 is that the work(of the present embodiment divides the helical antenna radiant heating device of radiation integrated to add asphalt test piece
Body loss density distribution map after heat inside asphalt test piece, Figure 14 are after electromagnetic horn radiant heating device heats asphalt test piece
Body loss density distribution map inside asphalt test piece.As shown in Figure 13, heating region is 200mm × 200mm, in heating region
It is interior, after the work(of the present embodiment divides the helical antenna radiant heating device of radiation integrated to heat asphalt test piece, asphalt test piece table
Face generates four heating concentrated area A, and corresponding four helical antenna radiation directions, four heating concentrated areas connect, micro-
Wave radiation energy is filled with the inside of entire asphalt test piece, body loss density value from 8.0000e+002~5.7143e+001,
Inside entire asphalt test piece, illustrate that loss of the microwave energy inside test specimen is uniform, to being evenly heated effect inside test specimen
Fruit is preferable.As shown in Figure 14, heating region is 200mm × 200mm, in heating region, electromagnetic horn radiant heating device pair
After asphalt test piece heating, asphalt test piece surface only produces a heating concentrated area A, and the entire pitch of microwave energy underfill
The inside of test specimen, body loss density value cannot fill completely from 6.6376e+001~1.0619e+003, the distribution of body loss density
The inside of full entire asphalt test piece, but it is only distributed in the lower section of heating concentrated area A, the inside of asphalt test piece is heated not
.
(2) the helical antenna radiant heating device of radiation integrated the work(of the present embodiment is divided to be heated for bituminous paving,
And compared with electromagnetic horn radiant heating device, measured result is as follows：
Figure 15 is after the work(of the present embodiment divides the helical antenna radiant heating device of radiation integrated to heat asphalt test piece
The three dimension temperature solid distribution map of asphalt test piece, as shown in Figure 15, work(divides the helical antenna radiant heating device of radiation integrated
After being heated to asphalt test piece, four radiation areas are generated, and the temperature of four radiation areas is at 200 DEG C or more, minimum temperature
It it is 116 DEG C, mean temperature reaches 150 DEG C or so, has reached pitch and has softened required temperature, pitch can have been made to soften completely.
Figure 16 is that the three dimension temperature solid of asphalt test piece after electromagnetic horn radiant heating device heats asphalt test piece is distributed
Figure, as seen from the figure, after electromagnetic horn radiant heating device heats asphalt test piece, the maximum temperature of radiation areas is 91.9 DEG C,
Mean temperature only has 60 DEG C or so, cannot reach the temperature of pitch softening, pitch can not be made to soften completely, it follows that work(point
The helical antenna radiant heating device of radiation integrated is to the heating effect of pitch obviously than electromagnetic horn radiant heating device pair
The heating effect of pitch is good.
Show that in the case of the same magnetron source, work(divides the helical antenna of radiation integrated by specifically testing
Radiant heating device is probably electromagnetic horn radiant heating device to asphalt test piece heated perimeter to the heated perimeter of asphalt test piece
One times or so；It is a degree of that work(divides the helical antenna radiant heating device of radiation integrated to be carried out by the energy to aggregation
Work(point so that it possesses wider array of effective " hot-zone " under the same area；Work(divides the helical antenna radiant heating of radiation integrated
After device heats asphalt test piece, for the temperature on entire asphalt test piece surface up to 200 DEG C, mean temperature reaches 150 DEG C, after heating
Pitch can easily be opened by plane, in addition, dividing the helical antenna radiant heating device of radiation integrated using the work(of the present embodiment
After being heated to 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 depth dug out has reached 50mm, peripheral part temperature
Only 60 DEG C or so of degree, there is no softening, does not meet the requirement of bitumen recovery, the work(of the present embodiment divides the spiral of radiation integrated
After aerial radiation heating device heats pitch, pitch integrally can easily be cast aside, and the effect of heating is preferable.
The above Simulation results and measured result may indicate that the work(of the present embodiment divides the spiral day of radiation integrated
Beta radiation heating device can meet asphalt mixture heating energy requirement by carrying out rational work(point to focused energy
Meanwhile " hot-zone " area is increased, improve homogeneous heating degree.
By the test result of above example it is found that the present invention divides the helical antenna radiant heating of radiation integrated using work(
Device carries out the effect that microwave heats on the spot to bituminous paving and affirms than using the better of electromagnetic horn radiant heating device.
In conclusion the present invention is based on the bituminous paving microwave of electromagnetism Meta Materials heating means on the spot, improving microwave spoke
It penetrates heating uniformity and generates huge effect in terms of improving Net long wave radiation efficiency.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Be familiar with the method personnel in this method field the invention discloses method within the scope of, can easily think of the change or the replacement, such as convert
The structure type of resonant ring in aperiodic materials, as long as but it can form resonance at the operating frequencies, should all cover in this hair
Within bright protection domain, also such as converts microwave heating equipment or transformation adjusts the method etc. of standing-wave ratio.Therefore, of the invention
Protection domain should be based on the protection scope of the described claims.
Claims (8)
1. a kind of bituminous paving microwave based on electromagnetism Meta Materials heating means on the spot, which is characterized in that include the following steps：
Step 1, design cycle property material：On the two dimensional surface of first medium plate uniform period arrangement resonant ring to get；
Step 2, the aperiodic materials are placed on bituminous paving, the aperiodic materials form electricity with the bituminous paving
Magnetic Meta Materials；
Step 3, microwave heating equipment then in the top of the aperiodic materials is placed, adjusts standing-wave ratio to 2 hereinafter, to asphalt road
It is heated on the spot in face；The adjusting of the standing-wave ratio be by setting the aperiodic materials and the microwave heating equipment it
Between transmittance plate be adjusted；The transmittance plate includes second medium plate and the metal that is evenly spaced on the second medium plate
Piece.
2. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
In step 1, the resonant ring is metal resonant ring.
3. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
In step 1, the structure of the resonant ring is planar spiral-type.
4. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
In step 1, the structure of the resonant ring is micro-strip Stepped Impedance type.
5. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
By adjusting the distance between the transmittance plate and the aperiodic materials, standing-wave ratio is adjusted to 2 or less.
6. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
In step 3, the microwave heating equipment is aerial radiation heating device.
7. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
In step 3, the microwave heating equipment is electromagnetic horn radiant heating device.
8. the bituminous paving microwave according to claim 1 based on electromagnetism Meta Materials heating means on the spot, which is characterized in that
In step 3, the microwave heating equipment is the helical antenna radiant heating device that work(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 |
| CN110196267B (en) * | 2019-05-13 | 2021-06-29 | 安徽建筑大学 | Test method of infrared road detection device based on electromagnetic or microwave emission |
| 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 |
| CN114104298B (en) * | 2021-11-26 | 2023-12-22 | 山东大学 | Aircraft deicing device and method based on microwave orientation technology |
| CN114665242B (en) * | 2022-04-06 | 2023-03-24 | 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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