CN106990143A - A kind of measuring method and system of asphalt dielectric constant - Google Patents
A kind of measuring method and system of asphalt dielectric constant Download PDFInfo
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- CN106990143A CN106990143A CN201710084348.7A CN201710084348A CN106990143A CN 106990143 A CN106990143 A CN 106990143A CN 201710084348 A CN201710084348 A CN 201710084348A CN 106990143 A CN106990143 A CN 106990143A
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
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Abstract
The invention provides a kind of measuring method and system of asphalt dielectric constant, this method by obtaining electromagnetic wave time by bitumen mixture specimen and air in same distance respectively, and according to time of the electromagnetic wave by bitumen mixture specimen and air, obtain the dielectric constant of the asphalt in the bitumen mixture specimen.The system includes time acquisition unit and dielectric constant computing unit.Technical scheme being capable of dielectric constant that is quick, simple and accurately knowing asphalt to be measured, and then the construction quality of bituminous paving can be determined by dielectric constant, control to provide data basis accurately and securely for the management of asphalt pavement construction.
Description
Technical field
The present invention relates to asphalt pavement material detection field, and in particular to a kind of measurement side of asphalt dielectric constant
Method and system.
Background technology
Dielectric constant is an important indicator of material, in asphalt, and its dielectric constant, energy are determined by measuring
Compactness, the index of isolation of asphalt are enough calculated, the construction quality of bituminous paving is can determine, realizes that bituminous paving is applied
The management control of work.
At present, it is main in the bituminous paving completed is built to the dielectric constant measurement of asphalt, mainly using thunder
The dielectric for obtaining asphalt up to the electromagnetic wave and combination core boring sampling calculating for launching reception electromagnetic wave acquisition bituminous paving is normal
Number.When studying asphalt highway dielectric constant, the consideration based on measurement accuracy Yu practical operation complexity usually can not
Directly actual road surface dielectric constant is estimated and studied, and is that calculating determination is carried out by core boring sampling, road is damaged former
There is pavement structure, influence the current of road.For this reason, it may be necessary to carry out dielectric constant correlation point using laboratory pitch exemplar model
Analysis.
Summary content understands that traditional bituminous paving dielectric constant measurement is difficult, and be it is unfavorable to road structure, it is right
Single asphalt can not realize preferable measurement, and it is unfavorable that quality of asphalt mixtures is controlled.
The content of the invention
For defect of the prior art, the present invention provides a kind of measuring method of asphalt dielectric constant and is
System, can dielectric constant that is quick, simple and accurately knowing asphalt to be measured, and then dielectric constant can be passed through
The construction quality of bituminous paving is determined, controls to provide data basis accurately and securely for the management of asphalt pavement construction.
In order to solve the above technical problems, the present invention provides following technical scheme：
On the one hand, the invention provides a kind of measuring method of asphalt dielectric constant, methods described includes：
Electromagnetic wave time by bitumen mixture specimen and air in same distance is obtained respectively；
And, according to time of the electromagnetic wave by bitumen mixture specimen and air, obtain the asphalt
The dielectric constant of asphalt in test specimen.
Further, methods described also includes：
Asphalt to be measured is prepared into the bitumen mixture specimen of cubic；
And, record the thickness of the bitumen mixture specimen.
Further, methods described also includes：
Transmitting antenna and reception antenna are respectively connecting to radar host computer；
The signal receiving end of the signal transmitting terminal of the transmitting antenna and reception antenna is fixedly installed on test face-to-face
In plane；
And, record the distance between the reception antenna and transmitting antenna.
Further, it is described obtain respectively electromagnetic wave in same distance by bitumen mixture specimen and air when
Between, including：
The bitumen mixture specimen is placed between the reception antenna and transmitting antenna vertically, and the pitch is mixed
Close material test specimen and be respectively parallel to the reception antenna and transmitting antenna；
Obtain the time that the electromagnetic wave that the transmitting antenna sends reaches the reception antenna by bitumen mixture specimen；
And, the bitumen mixture specimen is taken out between the reception antenna and transmitting antenna, and obtain described
The electromagnetic wave that transmitting antenna is sent reaches the time of the reception antenna in atmosphere.
Further, the electromagnetic wave that the acquisition transmitting antenna is sent described in bitumen mixture specimen arrival by connecing
Receive the time of antenna, including：
In the electromagnetic wave that the transmitting antenna is sent after bitumen mixture specimen reaches the reception antenna, institute is obtained
The electromagnetic wave for stating radar host computer record passes through the total time of bitumen mixture specimen.
Further, it is described obtain the electromagnetic wave that the transmitting antenna sends reach in atmosphere the reception antenna when
Between, including：
After the electromagnetic wave that the transmitting antenna is sent reaches the reception antenna in atmosphere, the radar host computer is obtained
The electromagnetic wave of record passes through the total time of air.
Further, it is described according to time of the electromagnetic wave by bitumen mixture specimen and air, obtain the drip
The dielectric constant of asphalt in blue or green compound test specimen, including：
The electromagnetic wave is brought into following formula one by the time of bitumen mixture specimen and air, calculating obtains institute
State the permittivity ε of the asphalt in bitumen mixture specimen：
Wherein, u is magnetic conductivity；T' is the total time that the electromagnetic wave passes through bitumen mixture specimen；T is the radar master
The electromagnetic wave of machine record passes through the total time of air；C is the electromagnetic wave propagation speed；H is the bitumen mixture specimen
Thickness.
Further, it is described that transmitting antenna and reception antenna are respectively connecting to radar host computer, including：
The transmitting antenna is connected to the port one of the radar host computer with cable, and by the reception antenna cable
It is connected to the port two of the radar host computer.
Further, it is described by the bitumen mixture specimen be placed on vertically the reception antenna and transmitting antenna it
Between, including：
The bitumen mixture specimen is placed on the center between the reception antenna and transmitting antenna vertically.
On the other hand, the present invention also provides a kind of measuring system of asphalt dielectric constant, and the system includes：
Time acquisition unit, for obtaining electromagnetic wave respectively in same distance by bitumen mixture specimen and air
Time；
Dielectric constant computing unit, for according to time of the electromagnetic wave by bitumen mixture specimen and air, obtaining
Take the dielectric constant of the asphalt in the bitumen mixture specimen.
As shown from the above technical solution, a kind of measuring method of asphalt dielectric constant of the present invention and it is
System, this method by obtaining electromagnetic wave time by bitumen mixture specimen and air in same distance, Yi Jigen respectively
According to time of the electromagnetic wave by bitumen mixture specimen and air, the pitch mixing in the bitumen mixture specimen is obtained
The dielectric constant of material.The system includes time acquisition unit and dielectric constant computing unit.Technical scheme can be fast
Dielectric constant that is fast, simple and accurately knowing asphalt to be measured, and then pitch can be determined by dielectric constant
The construction quality on road surface, controls to provide data basis accurately and securely for the management of asphalt pavement construction.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of the measuring method of asphalt dielectric constant of the present invention；
Fig. 2 is the schematic flow sheet of also included step A00 in measuring method of the invention；
Fig. 3 is the schematic flow sheet of also included step B00 in measuring method of the invention；
Fig. 4 is the schematic flow sheet of step 100 in measuring method of the invention；
Fig. 5 be the present invention concrete application example in measurement apparatus structural representation；
Fig. 6 is a kind of structural representation of the measuring system of asphalt dielectric constant of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The embodiment of the present invention one provides a kind of embodiment of the measuring method of asphalt dielectric constant.Ginseng
See Fig. 1, the measuring method specifically includes following steps：
Step 100：Electromagnetic wave time by bitumen mixture specimen and air in same distance is obtained respectively.
In this step, the measurement apparatus being made up of radar host computer, transmitting antenna and reception antenna is tried asphalt
Part carries out electromagnetic wave measurement, and recording electromagnetic wave is passed through the time of bitumen mixture specimen, and, in same distance, electromagnetism
Ripple passes through the time of air.
Step 200：According to time of the electromagnetic wave by bitumen mixture specimen and air, the pitch mixing is obtained
Expect the dielectric constant of the asphalt in test specimen.
In this step, the electromagnetic wave recorded according to measurement apparatus passes through the time of bitumen mixture specimen, and, in phase
In same distance, electromagnetic wave passes through the time of air, obtains the dielectric constant of the asphalt in the bitumen mixture specimen.
It was found from foregoing description, embodiments of the invention can be quick, simple and accurately know that pitch to be measured is mixed
The dielectric constant of material is closed, and then the construction quality of bituminous paving can be determined by dielectric constant, is the pipe of asphalt pavement construction
Reason control provides data basis accurately and securely.
The embodiment of the present invention two provides the specific implementation that the step A00 before step 100 is implemented in above-mentioned measuring method
Mode.Referring to Fig. 2, step A00 specifically includes following steps：
Step A01：Asphalt to be measured is prepared into the bitumen mixture specimen of cubic.
Step A02：Record the thickness of the bitumen mixture specimen.
It was found from foregoing description, asphalt to be measured is prepared into the pitch of cubic by embodiments of the invention
Compound test specimen, is easy to deploy electromagnetic wave test to asphalt, and ensure that the accuracy of test process.
The embodiment of the present invention three provides the specific implementation that the step B00 before step 200 is implemented in above-mentioned measuring method
Mode.Referring to Fig. 3, step B00 specifically includes following steps：
Step B01：Transmitting antenna and reception antenna are respectively connecting to radar host computer.
In this step, the transmitting antenna is connected to the port one of the radar host computer with cable, and connect described
Receive the port two that antenna is connected to the radar host computer with cable.
Step B02：By the signal receiving end of the signal transmitting terminal of the transmitting antenna and reception antenna, fixation is set face-to-face
Put in test plane.
Step B03：Record the distance between the reception antenna and transmitting antenna.
It was found from foregoing description, embodiments of the invention are used to be reliably connected acquisition measurement apparatus before measuring, it is ensured that
The accuracy of subsequent measurement.
The embodiment of the present invention four provides the embodiment of step 100 in above-mentioned measuring method.Referring to Fig. 4, the step
Rapid 100 specifically include following steps：
Step 101：The bitumen mixture specimen is placed between the reception antenna and transmitting antenna vertically, and institute
State bitumen mixture specimen and be respectively parallel to the reception antenna and transmitting antenna.
In this step, the bitumen mixture specimen is placed between the reception antenna and transmitting antenna vertically
Center.
Step 102：Obtain the electromagnetic wave that the transmitting antenna sends and reach the reception day by bitumen mixture specimen
The time of line.
In this step, the electromagnetic wave sent in the transmitting antenna passes through bitumen mixture specimen and reaches the reception day
After line, the electromagnetic wave for obtaining the radar host computer record passes through the total time of bitumen mixture specimen.
Step 103：The bitumen mixture specimen is taken out between the reception antenna and transmitting antenna, and obtains institute
State the time that the electromagnetic wave that transmitting antenna sends reaches the reception antenna in atmosphere.
In this step, after the electromagnetic wave that the transmitting antenna is sent reaches the reception antenna in atmosphere, obtain
The electromagnetic wave of the radar host computer record passes through the total time of air.
It was found from foregoing description, embodiments of the invention can fast and accurately obtain electromagnetic wave and be passed through in same distance
The time of bitumen mixture specimen and air is spent, accurate data base is provided for the acquisition of the dielectric constant of asphalt
Plinth.
The embodiment of the present invention five provides the embodiment of step 200 in above-mentioned measuring method, and the step 200 is specific
Comprise the following steps：
The electromagnetic wave is brought into following formula one by the time of bitumen mixture specimen and air, calculating obtains institute
State the permittivity ε of the asphalt in bitumen mixture specimen：
Wherein, u is magnetic conductivity；T' is the total time that the electromagnetic wave passes through bitumen mixture specimen；T is the radar master
The electromagnetic wave of machine record passes through the total time of air；C is the electromagnetic wave propagation speed；H is the bitumen mixture specimen
Thickness.
For further description this programme, present invention also offers a kind of measuring method of asphalt dielectric constant
Concrete application example, the measuring method specifically includes following content：
The measuring method of asphalt dielectric constant based on Radar Technology be by by radar host computer, transmitting antenna,
Reception antenna, connection cable are mounted to a measurement apparatus, and bitumen mixture specimen is placed in into transmitting antenna and reception antenna
Between, the time of reception is issued to by determining signal, determine that electromagnetic wave passes through in air and bitumen mixture specimen when
Between difference obtain the dielectric constant of asphalt to calculate.Comprise the following steps that：
(1) various pieces of test device are connected as shown in Figure 5, form the test dress of asphalt dielectric constant
Put, fix the position of transmitting antenna and reception antenna, the distance between its is d.
Wherein, the distance of transmitting antenna and reception antenna is irremovable after test is entered.
(2) asphalt to be measured is selected, the test that asphalt is prepared into length regular length is tried
Part.
(3) main frame is opened, control radar main frame sends signal from port 1, and the time that transmitting antenna receives signal is t1,
The time that transmitting antenna sends electromagnetic wave to reception antenna is t2, the time that reception antenna sends the signal to port 2 is t3.By
Radar host computer can measure time T of the signal from port 1 to port 2, and T is t1、t2、t3Sum.
(4) bitumen mixture specimen prepared is positioned between transmitting antenna and reception antenna, control radar main frame
Signal is sent from port 1, the time that transmitting antenna receives signal is t1, transmitting antenna send electromagnetic wave to reception antenna when
Between be t4, the time that reception antenna sends the signal to port 2 is t3.In placement after bitumen mixture specimen, by radar host computer
It is t that signal the time T ' from port 1 to port 2, T ', which can be measured,1、t4、t3Sum.
(5) signal when placement is not with placing bitumen mixture specimen between transmitting antenna and reception antenna is calculated to launch with connecing
The time difference of receipts, and the dielectric constant for obtaining asphalt is calculated according to the following formula.
According to testing procedure, when not placing bitumen mixture specimen, electromagnetic wave from transmitting antenna to reception antenna when
Between be t2, when placing bitumen mixture specimen, time of the electromagnetic wave from transmitting antenna to reception antenna is t4。t2With t4Meter
Calculate as shown in formula 2 and formula 3.
t2=d/c (formula 2)
In formula：D --- arrive the distance between reception antenna for transmitting antenna；
C --- it is the aerial spread speed of electromagnetic wave；
H --- it is specimen thickness；
U --- it is magnetic conductivity, general value 1；
ε --- it is the dielectric constant of asphalt to be measured.
Wherein, t4-t2=T '-T=(t1+t4+t3)-(t1+t2+t3)
Thus, can be calculated by formula 2 and formula 3 obtain asphalt dielectric constant it is as shown in Equation 4.
In a concrete case, it is further described by taking the measure of AC-13C asphalt dielectric constants as an example：
(1) according to Fig. 5 connections radar host computer, transmitting antenna, reception antenna, and the position of FRPA-Fixed Radiation Pattern Antenna and reception antenna
Put, the distance for determining transmitting antenna and reception antenna is 1m.
(2) bitumen mixture specimen is prepared, test material preparation will be tested into length and width, high respectively 400mm ╳ 400mm ╳
50mm test specimen, thereby determines that test specimen test thickness is 50mm.
(3) bitumen mixture specimen to be measured is not placed in transmitting antenna and reception antenna, control to believe with radar host computer
Number, time T of the signal from port 1 to port 2 is measured for 23.347ns by radar host computer.
(4) bitumen mixture specimen to be measured is positioned between transmitting antenna and reception antenna.Control to believe with radar host computer
Number, time T ' of the signal from port 1 to port 2 is measured for 23.576ns by radar host computer.
Thus calculate obtain electromagnetic wave from bitumen mixture specimen to be measured by when with atmosphere by when time difference
For T ' and T difference, result of calculation is 0.229ns.
The thickness of known bitumen mixture specimen to be measured is 0.05m, and electromagnetic wave propagation speed is 0.3m/ns, according to public affairs
Formula 4 is calculated asphalt dielectric constant.
Thus the dielectric constant for measuring the AC-13C asphalts is 5.64.
It was found from foregoing description, embodiments of the invention can be quick, simple and accurately know that pitch to be measured is mixed
The dielectric constant of material is closed, and then the construction quality of bituminous paving can be determined by dielectric constant, is the pipe of asphalt pavement construction
Reason control provides data basis accurately and securely.
The embodiment of the present invention six provides a kind of survey for the asphalt dielectric constant that can realize above-mentioned measuring method
The embodiment of amount system, referring to Fig. 6, the measuring system specifically includes following steps：
Time acquisition unit 10, passes through bitumen mixture specimen and air for obtaining electromagnetic wave respectively in same distance
Time.
Dielectric constant computing unit 20, the time for passing through bitumen mixture specimen and air according to the electromagnetic wave,
Obtain the dielectric constant of the asphalt in the bitumen mixture specimen.
It was found from foregoing description, embodiments of the invention can be quick, simple and accurately know that pitch to be measured is mixed
The dielectric constant of material is closed, and then the compactness of asphalt, the index of isolation can be calculated, applying for bituminous paving is can determine
Working medium amount, realizes the management control of asphalt pavement construction.
Above example is merely to illustrate technical scheme, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed or replaced
Change, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a kind of measuring method of asphalt dielectric constant, it is characterised in that methods described includes：
Electromagnetic wave time by bitumen mixture specimen and air in same distance is obtained respectively；
And, according to time of the electromagnetic wave by bitumen mixture specimen and air, obtain the bitumen mixture specimen
In asphalt dielectric constant.
2. according to the method described in claim 1, it is characterised in that methods described also includes：
Asphalt to be measured is prepared into the bitumen mixture specimen of cubic；
And, record the thickness of the bitumen mixture specimen.
3. method according to claim 2, it is characterised in that methods described also includes：
Transmitting antenna and reception antenna are respectively connecting to radar host computer；
The signal receiving end of the signal transmitting terminal of the transmitting antenna and reception antenna is fixedly installed on test plane face-to-face
On；
And, record the distance between the reception antenna and transmitting antenna.
4. method according to claim 3, it is characterised in that described to obtain electromagnetic wave respectively in same distance by drip
The time of blue or green compound test specimen and air, including：
The bitumen mixture specimen is placed between the reception antenna and transmitting antenna vertically, and the asphalt
Test specimen is respectively parallel to the reception antenna and transmitting antenna；
Obtain the time that the electromagnetic wave that the transmitting antenna sends reaches the reception antenna by bitumen mixture specimen；
And, the bitumen mixture specimen is taken out between the reception antenna and transmitting antenna, and obtain the transmitting
The electromagnetic wave that antenna is sent reaches the time of the reception antenna in atmosphere.
5. method according to claim 4, it is characterised in that the electromagnetic wave that the acquisition transmitting antenna is sent passes through
Bitumen mixture specimen reaches the time of the reception antenna, including：
In the electromagnetic wave that the transmitting antenna is sent after bitumen mixture specimen reaches the reception antenna, the thunder is obtained
Electromagnetic wave up to host record passes through the total time of bitumen mixture specimen.
6. method according to claim 5, it is characterised in that the electromagnetic wave that the acquisition transmitting antenna is sent is in sky
The time of the reception antenna is reached in gas, including：
After the electromagnetic wave that the transmitting antenna is sent reaches the reception antenna in atmosphere, the radar host computer record is obtained
Electromagnetic wave pass through air total time.
7. method according to claim 6, it is characterised in that described that bitumen mixture specimen is passed through according to the electromagnetic wave
And the time of air, the dielectric constant of the asphalt in the bitumen mixture specimen is obtained, including：
The electromagnetic wave is brought into following formula one by the time of bitumen mixture specimen and air, calculating obtains the drip
The permittivity ε of asphalt in blue or green compound test specimen：
Wherein, u is magnetic conductivity；T' is the total time that the electromagnetic wave passes through bitumen mixture specimen；T remembers for the radar host computer
The electromagnetic wave of record passes through the total time of air；C is the electromagnetic wave propagation speed；H is the thickness of the bitumen mixture specimen
Degree.
8. method according to claim 3, it is characterised in that described that transmitting antenna and reception antenna are respectively connecting to thunder
Up to main frame, including：
The transmitting antenna is connected to the port one of the radar host computer with cable, and by the reception antenna cable connection
To the port two of the radar host computer.
9. method according to claim 4, it is characterised in that described that the bitumen mixture specimen is placed on institute vertically
State between reception antenna and transmitting antenna, including：
The bitumen mixture specimen is placed on the center between the reception antenna and transmitting antenna vertically.
10. a kind of measuring system of asphalt dielectric constant, it is characterised in that the system includes：
Time acquisition unit, for obtain respectively electromagnetic wave in same distance by bitumen mixture specimen and air when
Between；
Dielectric constant computing unit, for according to time of the electromagnetic wave by bitumen mixture specimen and air, obtaining institute
State the dielectric constant of the asphalt in bitumen mixture specimen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710084348.7A CN106990143B (en) | 2017-02-16 | 2017-02-16 | Method and system for measuring dielectric constant of asphalt mixture |
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|---|---|---|---|
| CN201710084348.7A CN106990143B (en) | 2017-02-16 | 2017-02-16 | Method and system for measuring dielectric constant of asphalt mixture |
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| CN106990143B CN106990143B (en) | 2019-12-06 |
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| CN114264884A (en) * | 2020-09-16 | 2022-04-01 | Oppo广东移动通信有限公司 | Dielectric constant measuring method and device |
| WO2022110910A1 (en) * | 2020-11-25 | 2022-06-02 | 武汉理工大学 | Asphalt mixture quality evaluation method for quantifying relative humidity factor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022110910A1 (en) * | 2020-11-25 | 2022-06-02 | 武汉理工大学 | Asphalt mixture quality evaluation method for quantifying relative humidity factor |
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| Publication number | Publication date |
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| CN106990143B (en) | 2019-12-06 |
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