CN109030517A - Material reflectance/transmissivity real-time measurement apparatus and method in microwave heating process - Google Patents
Material reflectance/transmissivity real-time measurement apparatus and method in microwave heating process Download PDFInfo
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- CN109030517A CN109030517A CN201811078968.0A CN201811078968A CN109030517A CN 109030517 A CN109030517 A CN 109030517A CN 201811078968 A CN201811078968 A CN 201811078968A CN 109030517 A CN109030517 A CN 109030517A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
Abstract
Material reflectance/transmissivity real-time measurement apparatus and method in a kind of microwave heating process, by microwave incident power, reflection power and the transmission power of material surface in directional coupler real-time measurement microwave heating process, to calculate the reflectivity and transmissivity of material.The present invention solves the problems, such as material reflectance/transmissivity real-time measurement in microwave heating process, the present invention solves the problems, such as that existing method is unable to measure material reflectance/transmissivity in microwave heating process, and the microwave heating process for further analysis and adjustment material is laid a good foundation.
Description
Technical field
The present invention relates to a kind of Composites Molding Techniques, reflected in especially a kind of Composite Microwave heating process
Rate/transmissivity measurement technology, the reflectance/transmittance real-time measurement dress of the material in specifically a kind of microwave heating process
It sets and method.
Background technique
Microwave is a kind of electromagnetic wave that frequency is 300M to 300GHz, and microwave heating is that material dependence absorbs microwave energy and incites somebody to action
It is converted into thermal energy, to keep material whole while the heating method of heating.The reflectance/transmittance of material determines material
Absorbing property, however, material during heating inside molecular thermalmotion etc. can substantially influence the reflectivity of material/thoroughly
Penetrate rate.Therefore, reflectance/transmittance of the material in entire microwave heating process is measured in real time for analyzing and adjusting microwave
Heating process plays the role of vital.
Existing method carries out conduction heating to microwave Single-mode Resonator and the sample placed inside it using resistance wire, from
And the reflectance/transmittance of test sample during heating.However, in microwave heating process material occur phase transformation reaction and
Heated Products are different from conduction heating process, and the method heating inertia of conduction heating is big, and material temperature is uneven.When adopting
When with microwave heating, due to microwave signal for heating (magnetron sending) and for the electromagnetism of reflectance/transmittance measurement
Signal (vector network analyzer sending) can interfere, therefore, how in microwave heating process measure material reflectivity/
Transmissivity is always art-recognized problem.
In view of the above-mentioned problems, the present invention provides a kind of material reflectance in microwave heating process/transmissivity real-time measurements
Material, is placed on that microwave singlemode resonance is intracavitary by apparatus and method, is added using microwave source transmitting microwave to intracavitary material
Heat carries out thermometric for sample using temperature measuring equipment, while using directional coupler real-time measurement material in microwave heating process
In microwave incident power, reflection power and transmission power.The present invention solves the real-time measurement material in microwave heating process
The problem of reflectance/transmittance, the microwave heating process for further analysis and adjustment material are laid a good foundation.
Summary of the invention
The purpose of the present invention is the reflectance/transmittance test devices for material cannot be used for asking for microwave heating occasion
Topic designs a kind of real-time measurement apparatus of the reflectance/transmittance of material in microwave heating process, realizes to microwave heatable material
The real-time validity test of reflectance/transmittance, while a kind of corresponding measurement method being provided.
Technical solution of the present invention first is that:
Material reflectance/transmissivity real-time measurement apparatus in a kind of microwave heating process, it includes microwave Single-mode Resonator 3 and micro-
Wave source 9, it is characterised in that the end A of the microwave Single-mode Resonator 3 is connected with tuner 5, tuner 5 and the first directional couple
Device 6 is connected, and the first directional coupler 6 is connected with circulator 7, on the one hand circulator is connected with water load 8, on the other hand passes through wave
It leads transmission line 17 to be connected with microwave source 9, microwave source 9 is for generating heating microwave power, and circulator 7 is with water load 8 for absorbing
The reflection power not fully absorbed by material 4, avoids damage to microwave source 9, and tuner 5 is reduced for adjusting transmission line impedance
Transmission line loss；The end B of microwave Single-mode Resonator 3 is sequentially connected the second directional coupler 2 and water load 1；Material 4 is placed on micro-
Microwave heating is carried out in wave Single-mode Resonator 3, the side of microwave Single-mode Resonator 3 is provided with micro-wave screening aperture 14, and temperature is adopted
Acquisition means 10 penetrate the heating temperature of the 14 real-time monitoring material 4 of micro-wave screening aperture, and send work in real time for temperature data
Industry computer 12, industrial computer 12 adjust the heating power of microwave source 9 by power control unit 11 in real time；In microwave heating
The end a of the first directional coupler 6 and the power meter at the end b measure microwave incident power and microwave reflection power and defeated respectively in the process
Enter in industrial computer 12, the power meter measurement microwave transmission power at the end c of the second directional coupler 2 is simultaneously sent to industrial calculating
In machine 12.
The face C of microwave Single-mode Resonator 3 has the cavity door 13 for picking and placing sample；The face D is provided with the use of micro-wave screening aperture 14
In to the progress thermometric of material 4 being placed in microwave Single-mode Resonator 3；Thermometric mode uses contact type optical fiber thermometric or non-contact
Formula infrared measurement of temperature.
It is first mounted in sample clamp for the material 4 that can soften under viscous state material 4 or high temperature and is placed on microwave again
In Single-mode Resonator 3, which is made (such as polytetrafluoroethylene (PTFE), glass, ceramics), sample using electromagnetic wave transparent material resistant to high temperature
Product fixture is made of the groove 16 and cover board 15 of placement material.
Technical solution of the present invention second is that:
Material reflectance/transmissivity method for real-time measurement in a kind of microwave heating process, it is characterised in that: surveyed using following steps
Reflectance/transmittance of the test material material in microwave heating process:
The first step opens the cavity door 13 in the face Single-mode Resonator 3C and places material 4, connects temperature collecting device 10 and to sample
Temperature carry out real-time measurement；
Second step opens microwave source 9, is heated according to the temperature curve of setting to material 4, adopted according to temperature collecting device 10
Difference between the temperature data and set temperature of collection is regulated and controled by heating power of the power controller 11 to microwave source 9；It is micro-
The end a of the first directional coupler 6 is used during Wave heating and the power meter at the end b measures microwave incident power respectively and microwave is anti-
Power is penetrated, the power meter at the second end directional coupler 2c measures microwave transmission power, and the data of acquisition are real-time transmitted to work
Industry computer 12 calculates the reflectance/transmittance of material 4 under different temperatures；
Third step after being heated to set temperature, closes microwave source 9, stops heating the specimen material in Single-mode Resonator 3.
The reflectivity is calculated using the microwave reflection power measured divided by microwave incident power, and transmissivity is used and measured
Microwave transmission power divided by microwave incident power calculate.
When material 4 is anisotropic material, the angle by adjusting sample and direction of an electric field completes its different directions
Reflectance/transmittance test.
Beneficial effects of the present invention:
It can be convenient using device and method of the present invention, simply measure reality of any materials in microwave heating process
When reflectance/transmittance.
Detailed description of the invention
Fig. 1 is general arrangement schematic diagram of the invention.
Fig. 2 is microwave one-mode cavity schematic diagram of the invention.
Fig. 3 is fixture schematic diagram of the invention.
In figure: 1 being water load, 2 be the second directional coupler, 3 be one-mode cavity, 4 be material, 5 be tuner, 6 be first
Directional coupler, 7 be circulator, 8 be water load, 9 be microwave source, 10 be temperature collecting device, 11 be power control unit, 12
It is cavity door for industrial computer, 13,14 be micro-wave screening aperture, 15 be cover board, 16 be groove, 17 is waveguide transmission line.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figs. 1-3.
Material reflectance/transmissivity real-time measurement apparatus in a kind of microwave heating process, it includes microwave Single-mode Resonator 3
It is connected with the end A of microwave source 9, the microwave Single-mode Resonator 3 with tuner 5, tuner 5 and 6 phase of the first directional coupler
Even, directional coupler 6 is connected with circulator 7, on the one hand circulator is connected with water load 8, on the other hand passes through waveguide transmission line
17 are connected with microwave source 9, and microwave source 9 is for generating heating microwave power, and circulator 7 and water load 8 are for absorbing not by material 4
The reflection power fully absorbed, avoids damage to microwave source 9, and tuner 5 reduces transmission line loss for adjusting transmission line impedance
Consumption；The end B of microwave Single-mode Resonator 3 is sequentially connected the second directional coupler 2 and water load 1；It is humorous that material 4 is placed on microwave single mode
The chamber 3 that shakes is interior to carry out microwave heating, and the side of microwave Single-mode Resonator 3 is provided with micro-wave screening aperture 14, temperature collecting device 10
Through the heating temperature of the 14 real-time monitoring material 4 of micro-wave screening aperture, and it sends industrial computer in real time by temperature data
12, industrial computer 12 adjusts the heating power of microwave source 9 by power control unit 11 in real time；In microwave heating process
The end a of one directional coupler 6 and the power meter at the end b measure microwave incident power and microwave reflection power respectively and input industrial meter
In calculation machine 12, the power meter measurement microwave transmission power at the end c of the second directional coupler 2 is simultaneously sent in industrial computer 12,
As shown in Figure 1.There is the cavity door 13 for picking and placing sample in the face C of microwave Single-mode Resonator 3；The face D is provided with micro-wave screening aperture
14 for carrying out thermometric to the material 4 being placed in microwave Single-mode Resonator 3, as shown in Figure 2；Thermometric mode uses contact light
Fine thermometric or Non-contact Infrared Temperature Measurement.When it is implemented, if material 4 is when can soften under viscous state or high temperature, it can be first
Such material 4 is mounted in sample clamp as shown in Figure 3 and is placed in microwave Single-mode Resonator 3 again, as shown in figure 3, sample
(such as polytetrafluoroethylene (PTFE), glass, ceramics) are made using electromagnetic wave transparent material resistant to high temperature in product fixture, and sample clamp is by placement material
Groove 16 and cover board 15 form.
As shown in Figure 1, the both ends of microwave Single-mode Resonator 3 are separately connected the second directional coupler 2 and tuner 5.Microwave
The manufacturer's standard of Single-mode Resonator 3 is BJ26, the length is 500mm, cross-sectional width and height be respectively 86.36mm and
43.18mm.The C Middle face of microwave Single-mode Resonator 3 is provided with the cavity door 13 for picking and placing sample 4.Cavity door 13 is high
43.18mm wide 50mm.The D Middle face of microwave Single-mode Resonator 3 is provided with the micro-wave screening for measuring 4 temperature of sample
Aperture 14, aperture 3mm.Tuner 5 be sequentially connected the first directional coupler 6, circulator 7, water load 8, waveguide transmission line 17,
Microwave source 9.The frequency of microwave source 9 is 2.45GHz, power 1500W.The manufacturer's standard of waveguide transmission line 17 equally uses
BJ26.Second directional coupler 2 connects water load 1.Fiber optic fluorescence temperature (FBG) demodulator or infrared survey are used in microwave heating process
The heating temperature of warm 10 real-time monitoring sample 4 of module, and temperature signal is sent to industrial control computer 12 in real time.Work
Industry controls the difference that computer 12 calculates measurement temperature signal and set temperature signal in real time, and real by power control unit 11
When adjust microwave source 9 heating power.In microwave heating process, pass through the end a of the first directional coupler 6 and the power meter at the end b
Real-time measurement microwave incident power and reflection power, the power meter real-time measurement microwave transmission function at the end c of the second directional coupler 2
Rate, to calculate the reflectance/transmittance of material.The frequency of first directional coupler 6 and the second directional coupler 2 is
2.45GHz, upper limit of the power 1500W.
Embodiment two.
Measure fibre reinforced bismaleimide resin based composites (ZT7H/QY9611) vertical fibers in microwave heating process
The reflectance/transmittance in direction.Firstly, making sample 4 using ZT7H/QY9611 prepreg, ply sequence is [0 °]16,
To guarantee that the direction of carbon fiber in test process is vertical with direction of an electric field, sample is having a size of 86(long) × 43(wide) × 2(thickness)
mm3.Then reflectance/transmittance of the following steps test material in microwave heating process is used:
The first step is opened the cavity door 13 in the face C of Single-mode Resonator 3 and places material 4, penetrated using infrared measurement of temperature module 10
The temperature of 14 real-time measurement sample 4 of micro-wave screening aperture；
Second step is opened microwave source 9, sample 4 is heated using the heating rate of 5 DEG C/min, and utilizes power
Controller 11 regulates and controls the heating power of microwave source 9, real-time using the first directional coupler 6 and the second directional coupler 2
Microwave incident power, reflection power and transmission power are measured, and is real-time transmitted to industrial computer 12, calculates material at a temperature of measurement
The reflectance/transmittance of material 4；
Third step closes microwave source 9 when being heated to 300 DEG C, stops heating the specimen material in Single-mode Resonator 3.
Embodiment three.
Measure reflectance/transmittance of the epoxy resin in microwave heating process.Epoxy resin is tested using following steps
Reflectance/transmittance in microwave heating process,
The first step pours into epoxy resin 4 in the groove 16 of sample clamp, and is sealed with cover board 15.The sample clamp is adopted
It is made of the polytetrafluoroethylene (PTFE) of high temperature resistant and wave transparent, outer profile size is 86(long) × 43(wide) × 20(thickness) mm3, interior grooves
Having a size of 80(long) × 38(wide) × 15(depth) mm3, the size of cover board 15 is 80(long) and × 38(wide) × 10(thickness) mm3.By sample
Fixture is put into microwave Single-mode Resonator 3, and optical fiber fluorescent sensor is inserted into microwave Single-mode Resonator 3 and sample clamp groove 16
In the thermometric aperture 14 of side, and it is sealed with high temperature gummed tape.Connect 10 real-time measurement epoxy of fiber optic fluorescence temperature (FBG) demodulator
The temperature of resin 4.Measure the reflectance/transmittance of epoxy resin 4 at room temperature；
Second step controls microwave heating process using industrial control computer 12, when heating, is measured according to fluorescent optical fiber sensor
Temperature by power control unit 11, be 5 DEG C/min by rate of heat addition control；When measurement, using 6 He of the first directional coupler
Second directional coupler, 2 real-time measurement microwave incident power, reflection power and transmission power, and it is real-time transmitted to industrial computer
12, calculate the reflectance/transmittance of material 4 at a temperature of measurement；
Third step, when epoxy resin temperature reaches 150 DEG C, closing whole system completes test.
The above is only specific application examples of the invention, are not limited in any way to protection scope of the present invention.All uses
Equivalents or equivalence replacement and the technical solution formed, all fall within rights protection scope of the present invention.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (6)
1. material reflectance/transmissivity real-time measurement apparatus in a kind of microwave heating process, it includes microwave Single-mode Resonator (3)
With microwave source (9), it is characterised in that the end A of the microwave Single-mode Resonator (3) is connected with tuner (5), tuner (5) with
First directional coupler (6) is connected, and the first directional coupler (6) is connected with circulator (7), circulator one side and water load
(8) it is connected, is on the other hand connected by waveguide transmission line (17) with microwave source (9), microwave source (9) is for generating heating microwave function
Rate, circulator (7) and water load (8) avoid damage to microwave source for absorbing the reflection power not fully absorbed by material (4)
(9), tuner (5) reduces transmission line loss for adjusting transmission line impedance；The end B of microwave Single-mode Resonator (3) is successively
Connect the second directional coupler (2) and water load (1)；Material (4) is placed on progress microwave in microwave Single-mode Resonator (3) and adds
Heat, the side of microwave Single-mode Resonator (3) are provided with micro-wave screening aperture (14), and temperature collecting device (10) penetrates the microwave screen
The heating temperature of aperture (14) real-time monitoring material (4) is covered, and sends temperature data in real time industrial computer (12), industry
Computer (12) adjusts the heating power of microwave source (9) by power control unit (11) in real time；In microwave heating process
The end a of one directional coupler (6) and the power meter at the end b measure microwave incident power and microwave reflection power respectively and input industry
In computer (12), the power meter measurement microwave transmission power at the end c of the second directional coupler (2) is simultaneously sent to industrial computer
(12) in.
2. the apparatus according to claim 1, it is characterised in that: the face C of microwave Single-mode Resonator (3), which has, picks and places sample
Cavity door (13)；The face D is provided with micro-wave screening aperture (14) for the material (4) being placed in microwave Single-mode Resonator (3)
Carry out thermometric；Thermometric mode uses contact type optical fiber thermometric or Non-contact Infrared Temperature Measurement.
3. the apparatus according to claim 1, it is characterised in that: being directed under viscous state material (4) or high temperature can soften
Material (4), which is first mounted in sample clamp, to be placed on again in microwave Single-mode Resonator (3), and the sample clamp is using resistant to high temperature
Wave material is made, and sample clamp is made of the groove (16) and cover board (15) of placement material.
4. material reflectance/transmissivity method for real-time measurement in a kind of microwave heating process, it is characterised in that: use following steps
Reflectance/transmittance of the test material in microwave heating process:
The first step is opened the cavity door (13) in Single-mode Resonator (3) face C and is placed material (4), connects temperature collecting device (10)
And real-time measurement is carried out to the temperature of sample；
Second step is opened microwave source (9), is heated according to the temperature curve of setting to material (4), according to temperature collecting device
(10) difference between the temperature data acquired and set temperature, by power controller (11) to the heating power of microwave source (9)
Regulated and controled；Microwave is measured respectively and is entered using the end a of the first directional coupler (6) and the power meter at the end b in microwave heating process
Penetrate power and microwave reflection power, the power meter at the second directional coupler (2) end c measures microwave transmission power, and by acquisition
Data are real-time transmitted to industrial computer (12), calculate the reflectance/transmittance of material (4) under different temperatures；
Third step after being heated to set temperature, is closed microwave source (9), and stopping adds the specimen material in Single-mode Resonator (3)
Heat.
5. according to the method described in claim 5, it is characterized by: the reflectivity is removed using the microwave reflection power measured
With the calculating of microwave incident power, transmissivity is calculated using the microwave transmission power measured divided by microwave incident power.
6. the apparatus according to claim 1, it is characterised in that: when material (4) are anisotropic material, by adjusting sample
The angle of product and direction of an electric field completes the reflectance/transmittance test of its different directions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811078968.0A CN109030517A (en) | 2018-09-17 | 2018-09-17 | Material reflectance/transmissivity real-time measurement apparatus and method in microwave heating process |
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| CN201811078968.0A CN109030517A (en) | 2018-09-17 | 2018-09-17 | Material reflectance/transmissivity real-time measurement apparatus and method in microwave heating process |
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Cited By (6)
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| CN109666924A (en) * | 2018-12-20 | 2019-04-23 | 长沙新材料产业研究院有限公司 | A kind of circulator protection system and control method |
| CN109856090A (en) * | 2019-03-26 | 2019-06-07 | 北京市燃气集团有限责任公司 | A kind of γ radio optics glass transmission on-line measurement device and method |
| CN110763921A (en) * | 2019-10-29 | 2020-02-07 | 宁波诺丁汉新材料研究院有限公司 | High-temperature dielectric loss characteristic measuring system and measuring method |
| CN111294998A (en) * | 2020-03-23 | 2020-06-16 | 成都赛纳微波科技有限公司 | Separate and present formula microwave heating equipment |
| CN111405700A (en) * | 2020-03-23 | 2020-07-10 | 成都赛纳微波科技有限公司 | Broadband band-stop microwave heating equipment |
| CN109781671B (en) * | 2019-03-11 | 2021-11-05 | 西北核技术研究所 | Transmission rate on-line test method and device |
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| CN109781671B (en) * | 2019-03-11 | 2021-11-05 | 西北核技术研究所 | Transmission rate on-line test method and device |
| CN109856090A (en) * | 2019-03-26 | 2019-06-07 | 北京市燃气集团有限责任公司 | A kind of γ radio optics glass transmission on-line measurement device and method |
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| CN111294998A (en) * | 2020-03-23 | 2020-06-16 | 成都赛纳微波科技有限公司 | Separate and present formula microwave heating equipment |
| CN111405700A (en) * | 2020-03-23 | 2020-07-10 | 成都赛纳微波科技有限公司 | Broadband band-stop microwave heating equipment |
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Application publication date: 20181218 |