CN108169250A - A kind of intelligent frequency-conversion microwave measurement for moisture content instrument and measuring method - Google Patents
A kind of intelligent frequency-conversion microwave measurement for moisture content instrument and measuring method Download PDFInfo
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- CN108169250A CN108169250A CN201810172101.5A CN201810172101A CN108169250A CN 108169250 A CN108169250 A CN 108169250A CN 201810172101 A CN201810172101 A CN 201810172101A CN 108169250 A CN108169250 A CN 108169250A
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- 238000005259 measurement Methods 0.000 title claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 11
- 239000000463 material Substances 0.000 claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000012546 transfer Methods 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000001228 spectrum Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005562 fading Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000002285 radioactive effect Effects 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 13
- 239000000126 substance Substances 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 241000452036 Hydrometra stagnorum Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 moisture Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- G01N22/04—Investigating moisture content
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to material moisture detection fields, more particularly to a kind of intelligent frequency-conversion microwave measurement for moisture content instrument, including detection device and control device, detection device includes c-type frame, the shielding box in two-arm above and below c-type frame, antenna up and down in shielding box and the microwave unit in underarm shielding box, the belt further included in detection material transfer belt claim；Control device includes the switch board mounted on c-type frame left, and built-in industrial control machine, PLC controller and the touch screen of connection are communicated in switch board；The microwave unit is connected with the built-in industrial control machine, PLC controller communication, and the belt claims to connect with the PLC controller.The present invention is ingenious in design, and best microwave frequency can be selected according to different materials, avoids the situation that high density, big thickness, big humidity material difficulty penetrate, harsh industrial environment is adapted to, not susceptible is measured, without radioactive source, safeguard that simply there is potential market value.
Description
Technical field
The present invention relates to material moisture detection fields, and in particular to a kind of intelligent frequency-conversion microwave measurement for moisture content instrument and measurement side
Method.
Background technology
Substance moisture content content is an important parameter in industrial production, and production process is had a major impact, and measures control
Inaccuracy easily causes rejection rate rising, energy consumption increase and environmental pollution etc..The method for measuring moisture at present：1st, laboratory is manually divided
Analysis, accuracy is high, and time lag is long, it is impossible to grasp moisture variation in real time.2nd, infrared water detector, by dust, steam and material face
Color influences, and only measurement surface moisture.3rd, conductance ice detector, contacting material probe abrasion is big, and material is easily bonded in probe
On.4th, neutron moisture tester, radioactive source maintenance management are difficult.5th, microwave water measurer, on-line checking are divided into transmission-type and reflective
Two kinds, reflective cost is higher, and transmission-type suffers from object since the microwave of different frequency is different to the penetration capacity of substance
Expect the influence of type and material thickness, testing result is made to generate deviation.
Invention content
The technical problem to be solved by the present invention is to how to overcome the shortcomings of the prior art, it is micro- to provide a kind of intelligent frequency-conversion
Wave drimeter and measuring method.
The present invention technical solution be：A kind of intelligent frequency-conversion microwave measurement for moisture content instrument, including detection device and control
Device, the detection device includes c-type frame, the shielding box in two-arm above and below the c-type frame, mounted on the screen
Cover the antenna up and down in box and the microwave unit in the underarm shielding box, the antenna up and down and the microwave unit
It is connected with coaxial cable, the belt further included in detection material transfer belt claims；The control device includes being mounted on
The switch board of the c-type frame left, communicated in the switch board built-in industrial control machine of connection, PLC controller and
Touch screen and the power supply that electricity is provided for the built-in industrial control machine, PLC controller and touch screen；The microwave unit with
The built-in industrial control machine, PLC controller communication connection, the belt claim to connect with the PLC controller.
Further, the antenna up and down is ultra-wideband microwave directional aerial.
Further, the microwave unit includes variable frequency microwave source.
Further, the microwave unit is connect with the built-in industrial control machine with ethernet communication.
Further, the switch board surface is equipped with oblong openings, and the touch screen is located in the opening.
Further, a kind of measurement moisture method of intelligent frequency-conversion microwave measurement for moisture content instrument is further included, is included the following steps：
(1) select best microwave frequency, establish quality of material, moisture microwave attenuation model, related data is stored in embedded work
Control machine；(2) material to be measured is transmitted by feed belt；(3) material to be measured is selected on the touchscreen；(4) PLC controller is from embedded
Industrial personal computer transfers the best microwave frequency of material to be measured, and the variable frequency microwave source in microwave unit is controlled to generate best microwave frequency,
It is sent out by lower antenna；(5) it is received across the microwave signal of feed belt, material by upper antenna, is transmitted to microwave unit again, by
Microwave unit completes microwave signal phase and amplitude processing；(6) microwave is passed through the front and rear letter of feed belt, material by microwave unit
Breath is transferred to built-in industrial control machine by Ethernet；(7) belt in material transfer belt claims weight of material information being transferred to
PLC controller is transferred to built-in industrial control machine by PLC controller；(8) built-in industrial control machine software by penetrate feed belt,
Microwave attenuation, material type and mass attenuation, blanking bar attenuation before and after material obtain the microwave attenuation that material moisture is brought, and then
Moisture content of material is calculated, is shown by touch screen.
Further, the step (1) of a kind of measurement moisture method of intelligent frequency-conversion microwave measurement for moisture content instrument includes：Ⅰ、
Sample of material is obtained, it is zero to be dried to moisture, and it is spare to be packed as several equal portions for equalization after cooling；IIth, more parts of sample of material are put
In adding water on static feed belt, the variable frequency microwave source in microwave unit is controlled to generate one by touch screen control PLC controller
The microwave of band frequency carries out spectrum scan, is stepped up that amount of water multiple scanning is multiple, and in the frequency spectrum formed from scanning, selection is most
Good microwave frequency；IIIth, sample of material is placed in portionwise on static feed belt, is put into position original and gradually adds up, often plus
Portion, the variable frequency microwave source of PLC controller control microwave unit generate best microwave frequency, are sent out by lower antenna, upper antenna connects
The scanning of one suboptimum microwave frequency of row is taken in, scanning result is transmitted to built-in industrial control machine after being handled by microwave unit, by being embedded in
Formula industrial personal computer software records microwave phase and amplitude fading situation of change automatically, until discharging all samples；IVth, discharge it is all
After sample, gradually increase the moisture of sample quality 0.5% in the sample, after increasing every time, PLC controller control microwave unit
Variable frequency microwave source generates best microwave frequency, is sent out, the reception progress one suboptimum microwave frequency scanning of upper antenna, swept by lower antenna
It retouches after result is handled by microwave unit and is transmitted to built-in industrial control machine, amplitude and phase are recorded by built-in industrial control machine software automatically
Variation, until increasing 1.5 times that water is all samples saturated water amount；Vth, by built-in industrial control machine software establish quality of material,
The microwave attenuation model of moisture.
A kind of intelligent frequency-conversion microwave measurement for moisture content instrument of the present invention, according to the microwave of different frequency to the penetration capacity of substance not
Together, best microwave frequency is selected to be scanned different materials, and has considered quality of material i.e. material thickness to surveying
The influence of result is measured, the measurement result for making material water ratio is more accurate.It is worth with market potential.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of intelligent frequency-conversion microwave measurement for moisture content instrument structure diagram disclosed by the invention；
Fig. 2 is a kind of intelligent frequency-conversion microwave measurement for moisture content instrument instrumentation plan disclosed by the invention；
Fig. 3 is a kind of intelligent frequency-conversion microwave measurement for moisture content instrument installation site figure disclosed by the invention.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be described in detail a kind of intelligent frequency-conversion microwave measurement for moisture content instrument and measurement side
Method.
As shown in Figure 1,3, a kind of intelligent frequency-conversion microwave measurement for moisture content instrument, including detection device and control device, the inspection
It surveys device and includes c-type frame 1, the shielding box 13,14 mounted on the c-type frame about 1 in two-arm 11,12, mounted on described
Antenna up and down 15,16 in shielding box 13,14 and the microwave unit 17 in the underarm shielding box 14, the day up and down
Line 15,16 is connect with the microwave unit 17 with coaxial cable 18, further includes the belt in detection material transfer belt
Claim 2；The control device includes the switch board 3 for being mounted on 1 left side of c-type frame, the company of communicating in the switch board 3
The built-in industrial control machine 31, PLC controller 32 and the touch screen 33 that connect and be the built-in industrial control machine 31, PLC controller 32
The power supply 34 of electricity is provided with touch screen 33；The microwave unit 17 is communicated with the built-in industrial control machine 31, PLC controller 32
Connection, the belt claim 2 to be connect with the PLC controller 32.The antenna 15,16 up and down is ultra-wideband microwave directional aerial.
The microwave unit 17 includes variable frequency microwave source.The microwave unit 17 is connected with the built-in industrial control machine 31 with ethernet communication
It connects.3 surface of switch board is equipped with oblong openings, and the touch screen 33 is located in the opening 32.
As shown in Fig. 2, a kind of moisture measuring method of intelligent frequency-conversion microwave measurement for moisture content instrument of the present invention, including following step
Suddenly：(1) select best microwave frequency, establish quality of material, moisture microwave attenuation model, related data deposit is embedded
Industrial personal computer；The step for specifically include：
Ith, sample of material is obtained, it is zero to be dried to moisture, and it is spare to be packed as several equal portions for equalization after cooling；IIth, by more parts
Sample of material is placed on static feed belt plus suitable quantity of water, by 33 control PLC controller 32 of touch screen, and then controls microwave list
The microwave that variable frequency microwave source in member 17 generates a band frequency carries out spectrum scan, and it is multiple to be stepped up amount of water multiple scanning,
In the frequency spectrum formed from scanning, best microwave frequency is selected；IIIth, sample of material is placed in portionwise on static feed belt,
Original position that is put into gradually is added up, often plus a, by 33 control PLC controller 32 of touch screen, and then controls microwave unit 17
Variable frequency microwave source generates best microwave frequency, is sent out by lower antenna 16, upper antenna 15 receives one suboptimum microwave frequency of progress and sweeps
It retouches, scanning result is transmitted to built-in industrial control machine 31 after being handled by microwave unit 17, remembered automatically by 31 software of built-in industrial control machine
Microwave phase and amplitude fading situation of change are recorded, until discharging all samples.IVth, after all samples are discharged, in the sample by
The secondary moisture for increasing sample quality 0.5% after increasing every time, by 33 control PLC controller 32 of touch screen, and then controls microwave list
The variable frequency microwave source of member 17 generates best microwave frequency, is sent out by lower antenna 16, upper antenna 15 receives and carries out a suboptimum microwave
Frequency scanning, scanning result is transmitted to built-in industrial control machine 31 after being handled by microwave unit 17, by 31 software of built-in industrial control machine
Automatic record amplitude and phase change, until increasing 1.5 times that water is all samples saturated water amount.Vth, by embedded industry control
31 software of machine establish quality of material, moisture microwave attenuation model.
(2) material to be measured is transmitted by feed belt；(3) material to be measured is selected on touch screen 33；(4) PLC controller 32
The best microwave frequency information of material to be measured is transferred from built-in industrial control machine 31, and the variable frequency microwave source in microwave unit 17 is controlled to produce
Raw best microwave frequency, is sent out by lower antenna 16；(5) it is received across the microwave signal of feed belt, material by upper antenna 15, weight
Microwave unit 17 newly is transmitted to, microwave signal phase is completed by microwave unit 17 and amplitude is handled；(6) microwave unit 17 is by microwave
Front and rear information across feed belt, material is transmitted to built-in industrial control machine 31 by Ethernet；(7) in material transfer belt
Belt claims 2 quality of material information is transferred to PLC controller 32, and built-in industrial control machine 31 is transferred to by PLC controller 32；(8)
Built-in industrial control machine 31 in software by penetrate microwave attenuation, material type and mass attenuation before and after feed belt, material,
Blanking bar attenuation is calculated, and is obtained the microwave attenuation that material moisture is brought, and then calculate moisture content of material, is passed through touch screen 33
Display.
In the use of the present invention, c-type frame 1 is directly installed on feed belt longeron or individually in structure, it is firm
It is durable, and ensure the shielding box 13,14 in two-arm 11,12 up and down accurately to just.In c-type frame 1, main moisture measurement
Element is upper and lower antenna 15,16, they are accurately aligned with material center holding on belt, to ensure that microbeam is worn along center line
Cross material.Due to being directed to different material in advance, it is determined that best Microwave Scanning frequency, and the quality of material, moisture is determined
The basic informations such as the microwave attenuation model of content are deposited and are shunk in 31 software of built-in industrial control machine.When measuring, pass through touch screen 33
Material to be measured is selected, touch screen 33 passes information to PLC controller 32, and PLC controller 32 is adjusted from built-in industrial control machine 31
The corresponding best microwave frequency information of the material is taken, and microwave unit 17 is controlled to carry out the best microwave frequency scanning of material to be measured.
The front and rear microwave information of scanning passes to 31 software of built-in industrial control machine, while the material of conveyer belt after being handled by microwave unit 17
Quality information passes to PLC controller 32 after also claiming 2 measurements by belt, and built-in industrial control machine 31 is passed to by PLC controller 32
Software, due to having the microwave attenuation model of quality of material, moisture, material type in 31 software of built-in industrial control machine in advance
The basic informations such as the microwave attenuation that mainly material dielectric constant is brought, blanking bar attenuation, 31 software of built-in industrial control machine can root
According to the microwave attenuation penetrated before and after feed belt, material, material type microwave attenuation, the attenuation that quality of material is brought, blanking bar declines
Subtract and calculate the microwave attenuation that material moisture is brought, then the microwave attenuation model by moisture, calculate material moisture
Content is shown by touch screen 33.The attenuation that quality of material is brought, the width in conveyer belt is certain, substantially
The attenuation brought for material thickness.
Above-described embodiment is in the art the purpose is to be to allow simply to illustrate that the technical concepts and features of the present invention
Those of ordinary skill can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent variation or modification made according to the essence of the content of present invention, should all covers within the scope of the present invention.
Claims (7)
1. a kind of intelligent frequency-conversion microwave measurement for moisture content instrument, including detection device and control device, it is characterised in that：
The detection device includes c-type frame, the shielding box in two-arm above and below the c-type frame, mounted on the screen
Cover the antenna up and down in box and the microwave unit in the underarm shielding box, the antenna up and down and the microwave unit
It is connected with coaxial cable, the belt further included in detection material transfer belt claims；
The control device includes the switch board mounted on the c-type frame left, and connection is communicated in the switch board
Built-in industrial control machine, PLC controller and touch screen and provided for the built-in industrial control machine, PLC controller and touch screen
The power supply of electricity；
The microwave unit is connected with the built-in industrial control machine, PLC controller communication, and the belt claims to control with the PLC
Device connects.
2. a kind of intelligent frequency-conversion microwave measurement for moisture content instrument according to claim 1, it is characterised in that：Antenna is above and below described
Ultra-wideband microwave directional aerial.
3. a kind of intelligent frequency-conversion microwave measurement for moisture content instrument according to claim 1 or 2, it is characterised in that：The microwave list
Member includes variable frequency microwave source.
4. a kind of intelligent frequency-conversion microwave measurement for moisture content instrument according to claim 3, it is characterised in that：The microwave unit with
The built-in industrial control machine is connected with ethernet communication.
5. a kind of intelligent frequency-conversion microwave measurement for moisture content instrument according to claim 1, it is characterised in that：The switch board surface
Equipped with oblong openings, the touch screen is located in the opening.
6. a kind of measurement moisture method of intelligent frequency-conversion microwave measurement for moisture content instrument according to claim 4, it is characterised in that
Include the following steps：
(1) select best microwave frequency, establish quality of material, moisture microwave attenuation model, related data deposit insertion
Formula industrial personal computer；
(2) material to be measured is transmitted by feed belt；
(3) material to be measured is selected on the touchscreen；
(4) PLC controller transfers the best microwave frequency of material to be measured from built-in industrial control machine, and controls the frequency conversion in microwave unit
Microwave source generates best microwave frequency, is sent out by lower antenna；
(5) it is received across the microwave signal of feed belt, material by upper antenna, microwave unit is transmitted to again, by microwave unit
Complete microwave signal phase and amplitude processing；
(6) microwave is passed through the front and rear information of feed belt, material to be transferred to built-in industrial control machine by Ethernet by microwave unit；
(7) belt in material transfer belt claims weight of material information being transferred to PLC controller, is transferred to by PLC controller
Built-in industrial control machine；
(8) built-in industrial control machine software is declined by microwave attenuation, material type and the quality before and after penetrating feed belt, material
Subtract, blanking bar attenuation obtains the microwave attenuation that material moisture is brought, and then calculates moisture content of material, shown by touch screen.
7. a kind of measurement moisture method of intelligent frequency-conversion microwave measurement for moisture content instrument according to claim 6, it is characterised in that
The step (1) includes：
Ith, sample of material is obtained, it is zero to be dried to moisture, and it is spare to be packed as several equal portions for equalization after cooling；
IIth, more parts of sample of material are placed on static feed belt and add water, microwave list is controlled by touch screen control PLC controller
The microwave that variable frequency microwave source in member generates a band frequency carries out spectrum scan, and it is multiple to be stepped up amount of water multiple scanning, from
It scans in the frequency spectrum formed, selects best microwave frequency；
IIIth, sample of material is placed in portionwise on static feed belt, is put into position original and gradually adds up, often plus portion, by
The variable frequency microwave source of touch screen control PLC controller control microwave unit generates best microwave frequency, is sent out, gone up to the sky by lower antenna
Line, which receives, carries out suboptimum microwave frequency scanning, and scanning result is transmitted to built-in industrial control machine after being handled by microwave unit, by
Built-in industrial control machine software records microwave phase and amplitude fading situation of change automatically, until discharging all samples；
IVth, after all samples are discharged, gradually increase the moisture of sample quality 0.5% in the sample, after increasing every time, by touching
The variable frequency microwave source for shielding control PLC controller control microwave unit generates best microwave frequency, is sent out by lower antenna, upper antenna connects
The scanning of one suboptimum microwave frequency of row is taken in, scanning result is transmitted to built-in industrial control machine after being handled by microwave unit, by being embedded in
Formula industrial personal computer software records amplitude and phase change automatically, until increasing 1.5 times that water is all samples saturated water amount；
Vth, by built-in industrial control machine software establish quality of material, moisture microwave attenuation model.
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| CN201810172101.5A CN108169250B (en) | 2018-03-01 | 2018-03-01 | Intelligent variable-frequency microwave moisture measuring instrument and measuring method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904590A (en) * | 2019-01-23 | 2019-06-18 | 浙江大学 | A kind of microwave antenna automatic alignment apparatus applied to cereal moisture percentage detection system |
| CN112903722A (en) * | 2019-12-04 | 2021-06-04 | 中联重科股份有限公司 | Detection method and detection system for water content of sandstone aggregate and concrete production equipment |
| CN114486943A (en) * | 2022-01-28 | 2022-05-13 | 青岛众志测控技术有限公司 | Intelligent frequency-selecting microwave moisture measuring instrument |
| JP2023500401A (en) * | 2020-06-15 | 2023-01-05 | 浙江大学 | SECONDARY FREQUENCY SELECTION METHOD AND DEVICE FOR MICROWAVE SWEEP DATA |
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| CN108169250B (en) | 2024-04-26 |
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