CN107271457A - Multiple spectra microwave hydro analysis method, device and drimeter - Google Patents
Multiple spectra microwave hydro analysis method, device and drimeter Download PDFInfo
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Abstract
The present invention relates to a kind of multiple spectra microwave hydro analysis method, device and drimeter.When carrying out moisture measurement, material to be measured is passed through using the microwave signal of multi beam different frequency, multi beam echo-signal can be obtained.Further, the data of multigroup phase difference and amplitude decay can be obtained, and then obtain the attenuation data of predetermined number.Because the microwave signal through material to be measured has a variety of different frequencies.Therefore, even if the microwave signal of some frequency therein passes through the conduction loss produced during material to be measured larger, and by the compensating action of remaining microwave signal, the interference that overall conduction loss is brought also can be reduced effectively.Therefore, equivalent to traditional moisture measuring method, the accuracy of testing result is effectively lifted.
Description
Technical field
The present invention relates to online measuring technique field, more particularly to a kind of multiple spectra microwave hydro analysis method, device
And drimeter.
Background technology
Microwave measurement for moisture content technology it is universal be applied to industry-by-industry.The e measurement technology is mainly used to monitoring and produced
The moisture of material in journey, so as to enterprise's raising product quality, effectively controls production process.
Microwave measurement for moisture content measuring principle is as follows：When microwave signal penetrates material, because the hydrone in material is pole
Property molecule, absorbable microwave is to produce the vibration of key pin, so as to be heat energy by electromagnetic energy so that microwave signal occurs phase and prolonged
The decay of slow and amplitude.Wherein, phase delay and amplitude decay are mainly related to the dielectric constant of material, and phase delay and amplitude
Decay is then mainly caused by dielectric loss and conduction loss.
When carrying out moisture measurement, dielectric loss could truly reflect the water content in material.Therefore, moisture is being carried out
During measurement, conduction loss and prominent dielectric loss should be avoided as far as possible.Because the composition of every kind of material is different, its electric conductivity is not yet
Together, thus the conduction loss resulted in there is also difference.For example, the mineral matter in coal ash, which can be dissolved in water, produces ion, outside
Power up in the presence of magnetic field, conduction loss is more readily formed in ionic conduction.
At present, microwave measurement for moisture content instrument is all to carry out moisture measurement using the microwave signal of fixed frequency.But, not jljl
Expect that the conduction loss and dielectric loss that are produced for the microwave of different frequency are different.For example in the coal ash of water content 10%
In, when frequency is relatively low, cause the influence of conduction loss to be more than dielectric loss because electric conductivity is protruded.In this case,
The result of moisture measurement can be caused inaccurate.
The content of the invention
Based on this, it is necessary to for existing moisture measuring method testing result it is inaccurate the problem of there is provided one kind can improve
As a result multiple spectra microwave hydro analysis method, device and the drimeter of accuracy.
A kind of multiple spectra microwave hydro analysis method, including step：
Predetermined number and the different multi beam microwave signal of frequency in the range of predeterminated frequency is obtained to be formed through material to be measured
Multi beam echo-signal be respectively relative to phase difference and the amplitude decay that the corresponding multi beam microwave signal is produced；
Phase difference and the amplitude decay produced to the multi beam echo-signal carries out quantification treatment respectively, obtains described default
The attenuation data of quantity；
The water content of the material to be measured is obtained according to the attenuation data of the predetermined number.
In one of the embodiments, phase difference and the amplitude decay produced to the multi beam echo-signal is measured respectively
Change is handled, and is the step of the attenuation data for obtaining the predetermined number：
The ratio that the phase difference of each echo-signal is decayed with amplitude is obtained respectively, to be used as the attenuation data.
In one of the embodiments, containing for the material to be measured is obtained according to the attenuation data of the predetermined number
The step of water is：
Using default calibration matrix and the attenuation data, and it is described to obtain to use lambert's Bill formula to be iterated
Water content.
A kind of multiple spectra microwave hydro amount analytical equipment, including：
Acquisition module, is passed through for obtaining the different multi beam microwave signal of predetermined number and frequency in the range of predeterminated frequency
The multi beam echo-signal of material formation to be measured is respectively relative to phase difference and amplitude that the corresponding multi beam microwave signal is produced
Decay；
Quantization modules, phase difference and the amplitude decay for being produced to the multi beam echo-signal carries out quantification treatment, obtains
To the attenuation data of the predetermined number；
Analysis module, the water content for obtaining the material to be measured according to the attenuation data of the predetermined number.
In one of the embodiments, the quantization modules be used to obtaining respectively the phase difference of each echo-signal with
The ratio of amplitude decay, to be used as the attenuation data.
In one of the embodiments, the analysis module is used to utilize default calibration matrix and the attenuation data,
And use lambert's Bill formula to be iterated to obtain the water content.
A kind of drimeter, including assess instrument and the transmitting antenna being connected with the assessment instrument communication and receive day
Line, the assessment instrument includes：
Frequency controller, for generating predetermined number and the different multi beam microwave signal of frequency in the range of predeterminated frequency；
Processor, is respectively relative to what the corresponding multi beam microwave signal was produced for obtaining the multi beam echo-signal
Phase difference and amplitude decay；Phase difference and the amplitude decay produced to the multi beam echo-signal carries out quantification treatment respectively, obtains
To the attenuation data of the predetermined number；The aqueous of the material to be measured is obtained according to the attenuation data of the predetermined number
Amount；
The transmitting antenna is used to launch the multi beam microwave signal to material to be measured；
The reception antenna is used to receive the multi beam microwave signal through the multi beam echo letter of the material formation to be measured
Number.
In one of the embodiments, the frequency controller, which is additionally operable to obtain, sets instruction, and is referred to according to the setting
Order obtains the predeterminated frequency scope.
In one of the embodiments, phase difference and the amplitude decay that the processor is produced to the multi beam echo-signal
The step of carrying out quantification treatment, the attenuation data for obtaining the predetermined number specifically includes：For obtaining respectively each described time
The ratio that the phase difference of ripple signal is decayed with amplitude, to be used as the attenuation data.
In one of the embodiments, the processor is treated according to being obtained the attenuation data of the predetermined number
The step of water content for surveying material, specifically includes：For utilizing default calibration matrix and the attenuation data, and use Bill
Lambert's formula is iterated to obtain the water content.
Above-mentioned multiple spectra microwave hydro analysis method, device and drimeter, utilize the micro- of multi beam different frequency
Ripple signal passes through material to be measured, can obtain multi beam echo-signal.Further, the number of multigroup phase difference and amplitude decay can be obtained
According to, and then obtain the attenuation data of predetermined number.Because the microwave signal through material to be measured has a variety of different frequencies.Cause
This, is even if the microwave signal of some frequency therein passes through the conduction loss produced during material to be measured larger, and it is micro- by remaining
The compensating action of ripple signal, the interference that overall conduction loss is brought also can be reduced effectively.Therefore, equivalent to traditional moisture
Measuring method, the accuracy of testing result is effectively lifted.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of multiple spectra microwave hydro analysis method in one embodiment of the invention；
Fig. 2 passes through the schematic diagram of the amplitude decay after material to be measured for the microwave signal of different frequency；
Fig. 3 is the module diagram of multiple spectra microwave hydro amount analytical equipment in one embodiment of the invention；
Fig. 4 is the schematic diagram of drimeter in one embodiment of the invention；
Fig. 5 is the schematic flow sheet that drimeter shown in Fig. 4 realizes moisture measuring method.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give the preferred embodiment of the present invention.But, the present invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more saturating
It is thorough comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or can also have element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
As shown in figure 1, multiple spectra microwave hydro analysis method in one embodiment of the invention include step S110~
Step S130：
Predetermined number and the different multi beam microwave signal of frequency in the range of step S110, acquisition predeterminated frequency pass through to be measured
The multi beam echo-signal of material formation is respectively relative to phase difference and the amplitude decay that corresponding multi beam microwave signal is produced.
Specifically, the predeterminated frequency scope of microwave signal is usually wider frequency range.For example, 500MHZ is to 5GHZ's
Scope.When microwave signal passes through material to be measured, because moisture, to the absorption of energy, can cause through treating in material to be detected
The decay of phase offset and amplitude occurs for the echo-signal for surveying material.Material to be measured typically refers to the needs such as grain, cotton, pipe tobacco
The material strictly controlled water content, provides a kind of pipe tobacco multiple spectra microwave hydro amount point in a specific embodiment
Analysis method, the material to be measured is pipe tobacco.
During one-shot measurement, multi beam microwave signal is sent to material to be measured.Multi beam microwave signal can pass through wavelength-division
Multiplexed form is sent simultaneously, can also be sent in preset time period.For example, it is different that 100 beam frequencies can be sent in 25 milliseconds
Microwave signal.Wherein, there is difference in the frequency of multi beam microwave signal.Therefore, every beam microwave signal is caused to pass through after material to be measured,
Its corresponding echo-signal is produced relative to the phase difference produced by raw microwave signal and amplitude decay with other echo-signals
Phase difference and amplitude decay there is also difference.For example, when predetermined number is 100, then it represents that using the micro- of 100 beam discrete frequencies
Ripple signal passes through material to be measured.Further, then 100 groups of phase differences and amplitude attenuation data can be obtained.
As shown in Fig. 2 when passing through same material to be measured using the microwave signal of different frequency, each echo-signal is relative to original
Phase difference and the amplitude decay that the microwave signal of beginning is produced have differences.
Step S120, the phase difference produced to multi beam echo-signal and amplitude decay carry out quantification treatment respectively, obtain pre-
If the attenuation data of quantity.
Specifically, the step of quantification treatment can be every group of phase difference and amplitude decay are taken absolute value, are added, phase
Subtract computing or carry out mutually divided by obtain the ratio that phase difference is decayed with amplitude.There is present count due to being obtained in above-mentioned steps S110
Phase difference and the amplitude decay of amount.Therefore, the attenuation data of predetermined number is can obtain after quantification treatment.
Step S130, the water content of material to be measured is obtained according to the attenuation data of predetermined number.
Specifically, under the microwave signal of specific frequency, known to the corresponding relation of phase difference, amplitude decay and water content.
Therefore, the attenuation data and the corresponding relation of water content that can be set up after quantifying, and further obtained according to obtained attenuation data
Water content.
Further, due to including multigroup attenuation data.Therefore, weighted mean method, minimal error threshold value point can be passed through
Cut the modes such as algorithm to optimize the water content measured, so as to lift the accuracy of testing result.
Specifically, because the microwave signal through material to be measured has a variety of different frequencies.Therefore, though it is therein certain
The microwave signal of individual frequency passes through the conduction loss produced during material to be measured larger, and is made by the compensation of remaining microwave signal
With the interference that overall conduction loss is brought also can be reduced effectively.Therefore, equivalent to traditional moisture measuring method, detection
As a result accuracy is effectively lifted.
In one embodiment, above-mentioned steps S130 is：Using default calibration matrix and attenuation data, and use Bill
Lambert's formula is iterated to obtain water content.
Specifically, setting up calibrating patterns, water content is obtained using Beer-Lambert formula：
Wherein, C is water content (%), b0To return intercept (preset constant), biFor regression coefficient (calibration matrix), Ai is
The matrix of attenuation data formation.N is frequency number.For example, when microwave signal quantity is 100 beam, bi, Ai be what 1 row 100 was arranged
Matrix, and n is equal to 100.
Further, biPrestore, can be directly invoked when obtaining C using Beer-Lambert formula.By setting up
Calibrating patterns, and asked using partial least squares algorithm and can obtain bi.Concrete mode is as follows：
In calibrating patterns, the water content of multiple known samples can be used to lower Matrix Formula and represent：
X=TWT+E
And for material to be measured, its water content then can be used to lower Matrix Formula and represent：
C=UST+F
X=p (T)+E → X=TPT+E
Wherein that, E and F are constants, and T and U are that scores, W and E are loading, and formula conversion is available：
C=q (T)+F → C=TQT+F
Its China, P and Q are loading matrices.Therefore, calibration matrix is further obtained：
bi=W (PTW)-1qT
Above-mentioned calibration matrix is substituted into Beer-Lambert formula and is overlapped computing, accurate water content just can be obtained
Testing result.
In one embodiment, above-mentioned steps S120 is：The phase difference and amplitude for obtaining each echo-signal respectively are decayed
Ratio, to be used as attenuation data.
Specifically, the value that the difference of phase difference and amplitude are decayed is taken absolute value carry out division arithmetic, you can obtain above-mentioned
Ratio.For example, when irradiating 1 centimetre of water using 1.15GHz microwave signal, amplitude decays to 1dB, phase difference is 127.5 °,
The ratio then obtained is then 1/127.45 or 127.45.
Phase difference is decayed relevant with the density of material to be measured with amplitude.But, in the case where water content is constant, phase difference
The ratio decayed with amplitude then will not be because material density changes and changes.Therefore, directly declined with existing according to phase difference and amplitude
Subtract and compared to obtain the mode of water content, determine that water content is avoided that material density change causes shadow to testing result by ratio
Ring, so as to further lift the accuracy of testing result.
Above-mentioned multiple spectra microwave hydro analysis method, material to be measured is passed through using the microwave signal of multi beam different frequency,
Multi beam echo-signal can be obtained.Further, the data of multigroup phase difference and amplitude decay can be obtained, and then obtain predetermined number
Attenuation data.Because the microwave signal through material to be measured has a variety of different frequencies.Therefore, even if some frequency therein
The conduction loss that produces is larger when the microwave signal of rate passes through material to be measured, and by the compensating action of remaining microwave signal, always
The interference that the conduction loss of body is brought also can be reduced effectively.Therefore, equivalent to traditional moisture measuring method, testing result
Accuracy is effectively lifted.
The present invention also provides a kind of multiple spectra microwave hydro amount analytical equipment.As shown in figure 3, in one embodiment of the invention
Multiple spectra microwave hydro amount analytical equipment include acquisition module 110, quantization modules 120 and analysis module 130.
Acquisition module 110, which is used to obtaining the different multi beam microwave signal of predetermined number and frequency in the range of predeterminated frequency, to be worn
The multi beam echo-signal for crossing material to be measured formation is respectively relative to phase difference and amplitude that corresponding multi beam microwave signal produces and declined
Subtract.
Specifically, the predeterminated frequency scope of microwave signal is usually wider frequency range.For example, 500MHZ is to 5GHZ's
Scope.When microwave signal passes through material to be measured, because moisture, to the absorption of energy, can cause through treating in material to be detected
The decay of phase offset and amplitude occurs for the echo-signal for surveying material.Material to be measured typically refers to the needs such as grain, cotton, pipe tobacco
The material strictly controlled water content, provides a kind of pipe tobacco multiple spectra microwave hydro amount point in a specific embodiment
Analysis method, the material to be measured is pipe tobacco.
During one-shot measurement, multi beam microwave signal is sent to material to be measured.Multi beam microwave signal can pass through wavelength-division
Multiplexed form is sent simultaneously, can also be sent in preset time period.For example, it is different that 100 beam frequencies can be sent in 25 milliseconds
Microwave signal.Wherein, there is difference in the frequency of multi beam microwave signal.Therefore, every beam microwave signal is caused to pass through after material to be measured,
Its corresponding echo-signal is produced relative to the phase difference produced by raw microwave signal and amplitude decay with other echo-signals
Phase difference and amplitude decay there is also difference.For example, when predetermined number is 100, then it represents that using the micro- of 100 beam discrete frequencies
Ripple signal passes through material to be measured.Further, then 100 groups of phase differences and amplitude attenuation data can be obtained.
As shown in Fig. 2 when passing through same material to be measured using the microwave signal of different frequency, each echo-signal is relative to original
Phase difference and the amplitude decay that the microwave signal of beginning is produced have differences.
Quantization modules 120 are used for the phase difference produced to multi beam echo-signal and amplitude decay carries out quantification treatment, obtain
The attenuation data of predetermined number.
Specifically, quantization modules 120 can be that every group of phase difference and amplitude decay are carried out the step of carrying out quantification treatment
Take absolute value, be added, additive operation or carrying out mutually divided by obtain the ratio that phase difference and amplitude are decayed.Due in above-mentioned steps
The phase difference for having predetermined number and amplitude decay are obtained in S110.Therefore, the decay number of predetermined number is can obtain after quantification treatment
According to.
Analysis module 130 is used for the water content that material to be measured is obtained according to the attenuation data of predetermined number.
Specifically, under the microwave signal of specific frequency, known to the corresponding relation of phase difference, amplitude decay and water content.
Therefore, the attenuation data and the corresponding relation of water content that can be set up after quantifying, analysis module 130 is further according to obtained decay
Data obtain water content.
Further, due to including multigroup attenuation data.Therefore, analysis module 130 can pass through weighted mean method, minimum
The modes such as error threshold partitioning algorithm are optimized to the water content measured, so as to lift the accuracy of testing result.
Specifically, because the microwave signal through material to be measured has a variety of different frequencies.Therefore, though it is therein certain
The microwave signal of individual frequency passes through the conduction loss produced during material to be measured larger, and is made by the compensation of remaining microwave signal
With the interference that overall conduction loss is brought also can be reduced effectively.Therefore, equivalent to traditional moisture measuring method, detection
As a result accuracy is effectively lifted.
In one embodiment, above-mentioned steps S130 is：Using default calibration matrix and attenuation data, and use Bill
Lambert's formula is iterated to obtain water content.
Specifically, setting up calibrating patterns, water content is obtained using Beer-Lambert formula：
Wherein, C is water content (%), b0To return intercept (preset constant) biFor regression coefficient (calibration matrix), Ai is to decline
Subtrahend according to formation matrix.N frequency numbers.For example, when microwave signal quantity is 100 beam, bi, Ai be 1 row 100 row square
Battle array, and n is equal to 100.
Further, biPrestore, can be directly invoked when obtaining C using Beer-Lambert formula.By setting up
Calibrating patterns, and asked using partial least squares algorithm and can obtain bi.Concrete mode is as follows：
In calibrating patterns, the water content of multiple known samples can be used to lower Matrix Formula and represent：
X=TWT+E
And for material to be measured, its water content then can be used to lower Matrix Formula and represent：
C=UST+F
X=p (T)+E → X=TPT+E
Wherein that, E and F are constants, and T and U are that scores, W and E are loading, and formula conversion is available：
C=q (T)+F → C=TQT+F
Its China, P and Q are loading matrices.Therefore, calibration matrix is further obtained：
bi=W (PTW)-1qT
Above-mentioned calibration matrix is substituted into Beer-Lambert formula and is overlapped computing, accurate water content just can be obtained
Testing result.
In one embodiment, above-mentioned steps S120 is：The phase difference and amplitude for obtaining each echo-signal respectively are decayed
Ratio, to be used as attenuation data.
Specifically, the value that the difference of phase difference and amplitude are decayed is taken absolute value carry out division arithmetic, you can obtain above-mentioned
Ratio.For example, when irradiating 1 centimetre of water using 1.15GHz microwave signal, amplitude decays to 1dB, phase difference is 127.5 °,
The ratio then obtained is then 1/127.45 or 127.45.
Phase difference is decayed relevant with the density of material to be measured with amplitude.But, in the case where water content is constant, phase difference
The ratio decayed with amplitude then will not be because material density changes and changes.Therefore, directly declined with existing according to phase difference and amplitude
Subtract and compared to obtain the mode of water content, determine that water content is avoided that material density change causes shadow to testing result by ratio
Ring, so as to further lift the accuracy of testing result.
Above-mentioned multiple spectra microwave hydro amount analytical equipment, material to be measured is passed through using the microwave signal of multi beam different frequency,
Multi beam echo-signal can be obtained.Further, the data of multigroup phase difference and amplitude decay can be obtained, and then obtain predetermined number
Attenuation data.Because the microwave signal through material to be measured has a variety of different frequencies.Therefore, even if some frequency therein
The conduction loss that produces is larger when the microwave signal of rate passes through material to be measured, and by the compensating action of remaining microwave signal, always
The interference that the conduction loss of body is brought also can be reduced effectively.Therefore, equivalent to traditional moisture measuring method, testing result
Accuracy is effectively lifted.
The present invention also provides a kind of drimeter.As shown in figure 4, the drimeter 10 in one embodiment of the invention
Including assessing instrument 100, transmitting antenna 200 and reception antenna 300.Transmitting antenna 200 and reception antenna 300 are with assessing instrument
100 communication connections.
Assessing instrument 100 includes frequency controller 101 and processor 102.Wherein, frequency controller 101 is used for default
Generation predetermined number and the different multi beam microwave signal of frequency in frequency range.Specifically, frequency controller 101 includes quartz-crystal
Shake, low noise phase-locked loop frequency device, frequency mixer, attenuator, modulator, radio frequency amplifier, difference amplifier, wave filter, logarithm
Amplifier, phase difference comparator.
Transmitting antenna 200 is used to launch multi beam microwave signal to material to be measured；Reception antenna 300 is used to receive multi beam microwave
Signal passes through the multi beam echo-signal of material to be measured formation.
Specifically, the predeterminated frequency scope of microwave signal is usually wider frequency range.For example, 500MHZ is to 5GHZ's
Scope.When microwave signal passes through material to be measured, because moisture, to the absorption of energy, can cause through treating in material to be detected
The decay of phase offset and amplitude occurs for the echo-signal for surveying material.Material to be measured typically refers to the needs such as grain, cotton, pipe tobacco
The material strictly controlled water content, in a specific embodiment, the material to be measured is pipe tobacco.
During one-shot measurement, transmitting antenna 200 sends multi beam microwave signal to material to be measured.Multi beam microwave signal can
To be sent by wavelength-division multiplex form simultaneously, it can also be sent in preset time period.For example, 100 beams can be sent in 25 milliseconds
The different microwave signal of frequency.Wherein, there is difference in the frequency of multi beam microwave signal.Therefore, every beam microwave signal is caused to pass through
After material to be measured, its corresponding echo-signal is relative to the phase difference produced by raw microwave signal and amplitude decay and other times
There is also difference for phase difference and the amplitude decay that ripple signal is produced.For example, when predetermined number is 100, then it represents that using 100 beams frequency
The different microwave signal of rate passes through material to be measured.Further, then 100 groups of phase differences and amplitude attenuation data can be obtained.
Processor 102 is used to obtain the phase difference that multi beam echo-signal is respectively relative to corresponding multi beam microwave signal generation
And amplitude decay；Phase difference and the amplitude decay produced to multi beam echo-signal carries out quantification treatment respectively, obtains predetermined number
Attenuation data；The water content of material to be measured is obtained according to the attenuation data of predetermined number.Specifically, processor 102 includes control
Unit processed, microwave signal process module, communication module, power supply module, current output module and data signal input module.
Specifically, processor 102 is used to realize the multiple spectra microwave hydro analysis method shown in above-described embodiment, it has
Body implementation is described in detail in the above-described embodiments, therefore will not be repeated here.
In one embodiment, frequency controller 101, which is used to obtain, sets instruction and obtains default frequency according to setting instruction
Rate scope.
Therefore, according to the different attribute of different materials to be measured, suitable frequency range can be pre-set before measuring, so that
Conduction loss is efficiently reduced, further the accuracy of lifting testing result.
As shown in figure 5, above-mentioned drimeter is used to realize moisture measuring method, step S210~step is specifically included
S260。
Step S210, frequency controller generates predetermined number and the different multi beam microwave letter of frequency in the range of predeterminated frequency
Number.
Step S220, transmitting antenna launches multi beam microwave signal to material to be measured.
Step S230, reception antenna multi beam microwave signal passes through the multi beam echo-signal of material to be measured formation.
Specifically, the predeterminated frequency scope of microwave signal is usually wider frequency range.For example, 500MHZ is to 5GHZ's
Scope.When microwave signal passes through material to be measured, because moisture, to the absorption of energy, can cause through treating in material to be detected
The decay of phase offset and amplitude occurs for the echo-signal for surveying material.Material to be measured typically refers to the needs such as grain, cotton, pipe tobacco
The material strictly controlled water content, provides a kind of moisture in cut tobacco measuring method, this is treated in a specific embodiment
Survey material is pipe tobacco.
During one-shot measurement, multi beam microwave signal is sent to material to be measured.Multi beam microwave signal can pass through wavelength-division
Multiplexed form is sent simultaneously, can also be sent in preset time period.For example, it is different that 100 beam frequencies can be sent in 25 milliseconds
Microwave signal.Wherein, there is difference in the frequency of multi beam microwave signal.Therefore, every beam microwave signal is caused to pass through after material to be measured,
Its corresponding echo-signal is produced relative to the phase difference produced by raw microwave signal and amplitude decay with other echo-signals
Phase difference and amplitude decay there is also difference.For example, when predetermined number is 100, then it represents that using the micro- of 100 beam discrete frequencies
Ripple signal passes through material to be measured.Further, then 100 groups of phase differences and amplitude attenuation data can be obtained.
Step S240, obtains multi beam echo-signal and is respectively relative to the phase difference of corresponding multi beam microwave signal generation and shakes
Width is decayed.
Step S250, the phase difference produced to multi beam echo-signal and amplitude decay carry out quantification treatment, obtain present count
The attenuation data of amount；
Step S260, the water content of material to be measured is obtained according to the attenuation data of predetermined number.
Specifically, above-mentioned steps S240~step S260 is used to realize the multiple spectra microwave hydro amount shown in above-described embodiment
Analysis method, its specific implementation is described in detail in the above-described embodiments, therefore will not be repeated here.
In one embodiment, before step S210, in addition to step：Obtain and instruction is set and obtained according to setting instruction
Obtain predeterminated frequency scope.
Therefore, according to the different attribute of different materials to be measured, suitable frequency range can be pre-set before measuring, so that
Conduction loss is efficiently reduced, further the accuracy of lifting testing result.
Above-mentioned drimeter, passes through material to be measured using the microwave signal of multi beam different frequency, can obtain multi beam echo
Signal.Further, the data of multigroup phase difference and amplitude decay can be obtained, and then obtain the attenuation data of predetermined number.By
There are a variety of different frequencies in the microwave signal through material to be measured.Therefore, even if the microwave signal of some frequency therein
The conduction loss produced during through material to be measured is larger, and passes through the compensating action of remaining microwave signal, overall conduction loss
The interference brought also can be reduced effectively.Therefore, equivalent to traditional moisture measuring method, the accuracy of testing result is had
Effect lifting.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of multiple spectra microwave hydro analysis method, including step：
Obtain predetermined number and the different multi beam microwave signal of frequency in the range of predeterminated frequency and pass through many of material to be measured formation
Beam echo-signal is respectively relative to phase difference and the amplitude decay that the corresponding multi beam microwave signal is produced；
Phase difference and the amplitude decay produced to the multi beam echo-signal carries out quantification treatment respectively, obtains the predetermined number
Attenuation data；
The water content of the material to be measured is obtained according to the attenuation data of the predetermined number.
2. multiple spectra microwave hydro analysis method according to claim 1, it is characterised in that believe the multi beam echo
Number phase difference produced and amplitude decay carry out quantification treatment respectively, are the step of the attenuation data for obtaining the predetermined number：
The ratio that the phase difference of each echo-signal is decayed with amplitude is obtained respectively, to be used as the attenuation data.
3. multiple spectra microwave hydro analysis method according to claim 1, it is characterised in that according to the predetermined number
The attenuation data be the step of obtain the water content of the material to be measured：
Using default calibration matrix and the attenuation data, and it is described aqueous to obtain to use lambert's Bill formula to be iterated
Amount.
4. a kind of multiple spectra microwave hydro amount analytical equipment, it is characterised in that including：
Acquisition module, for obtaining the different multi beam microwave signal of predetermined number and frequency in the range of predeterminated frequency through to be measured
The multi beam echo-signal of material formation is respectively relative to phase difference and the amplitude decay that the corresponding multi beam microwave signal is produced；
Quantization modules, phase difference and the amplitude decay for being produced to the multi beam echo-signal carries out quantification treatment, obtains institute
State the attenuation data of predetermined number；
Analysis module, the water content for obtaining the material to be measured according to the attenuation data of the predetermined number.
5. multiple spectra microwave hydro amount analytical equipment according to claim 4, it is characterised in that the quantization modules are used for
The ratio that the phase difference of each echo-signal is decayed with amplitude is obtained respectively, to be used as the attenuation data.
6. multiple spectra microwave hydro amount analytical equipment according to claim 4, it is characterised in that the analysis module is used for
Using default calibration matrix and the attenuation data, and use lambert's Bill formula to be iterated to obtain the water content.
7. a kind of drimeter, including assess instrument and the transmitting antenna being connected with the assessment instrument communication and receive day
Line, it is characterised in that the assessment instrument includes：
Frequency controller, for generating predetermined number and the different multi beam microwave signal of frequency in the range of predeterminated frequency；
Processor, the phase that the corresponding multi beam microwave signal is produced is respectively relative to for obtaining the multi beam echo-signal
Difference and amplitude decay；Phase difference and the amplitude decay produced to the multi beam echo-signal carries out quantification treatment respectively, obtains institute
State the attenuation data of predetermined number；The water content of the material to be measured is obtained according to the attenuation data of the predetermined number；
The transmitting antenna is used to launch the multi beam microwave signal to material to be measured；
The reception antenna is used to receive the multi beam microwave signal through the multi beam echo-signal of the material formation to be measured.
8. drimeter according to claim 7, it is characterised in that the frequency controller is additionally operable to acquisition setting and referred to
Order, and set instruction to obtain the predeterminated frequency scope according to described.
9. drimeter according to claim 7, it is characterised in that the processor is produced to the multi beam echo-signal
The step of raw phase difference and amplitude decay carry out quantification treatment, the attenuation data for obtaining the predetermined number specifically includes：With
The ratio decayed in the phase difference for obtaining each echo-signal respectively with amplitude, to be used as the attenuation data.
10. drimeter according to claim 7, it is characterised in that the processor is according to the predetermined number
The step of attenuation data obtains the water content of the material to be measured specifically includes：For utilizing default calibration matrix and institute
Attenuation data is stated, and uses lambert's Bill formula to be iterated to obtain the water content.
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