CN105424727A - Method and apparatus for testing whether grain water content exceed standard by using microwave in online manner - Google Patents
Method and apparatus for testing whether grain water content exceed standard by using microwave in online manner Download PDFInfo
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- CN105424727A CN105424727A CN201410465568.0A CN201410465568A CN105424727A CN 105424727 A CN105424727 A CN 105424727A CN 201410465568 A CN201410465568 A CN 201410465568A CN 105424727 A CN105424727 A CN 105424727A
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Abstract
Embodiments of the present invention provide a method and an apparatus for testing whether the grain water content exceeds the standard by using microwave in an online manner. The method mainly comprises that two microwave signals having the same frequency, the same phase and the same amplitude are produced, wherein one microwave signal is transmitted through a reference channel, and the other microwave signal is transmitted through a current channel; the two microwave signals output by the reference channel and the current channel are received, and analysis comparison is performed to obtain the amplitude ratio and the phase difference of the two microwave signals output by the reference channel and the current channel; and according to the amplitude ratio and the phase difference of the two microwave signals, whether the water content of the grain in the current channel exceeds the standard is determined. With the embodiments of the present invention, it is ensured that the same parts of the transmitting circuits of the two channels have the same phase shift and the same attenuation; and the energy loss and the phase shift are easily detected during the passing-through-the-grain process are easily detected so as to easily, efficiently and intuitively test whether the grain water content exceeds the standard by using the microwave in the online manner.
Description
Technical field
The present invention relates to measuring grain moisture content technical field, particularly relate to a kind of method and apparatus utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content.
Background technology
In conveying grain into storehouse process, moisture detects tool and is of great significance, if not in time grain higher for moisture is rejected, then there is the possibility of going mouldy after putting in storage.Existing grain measurement of moisture content mode is artificial sampling Detection, because sampling Detection method efficiency is lower, can only detect more reliably sample, lacks ubiquity, makes the grain being mixed into high moisture content in grain heap become possibility.
Except artificial sampling detection method, current also have much based on the moisture detecting method of other technologies, such as capacitance method, electric-resistivity method, rays method, microwave method etc.At present, capacitance method, electric-resistivity method are not suitable for on-line checkingi; Rays method cost is higher, and causes radiation pollution to surrounding environment; Typical microwave moisture detecting method is limited by environmental factor, and in order to exempt the impact of environmental factor, often circuit is complicated, and data processing difficulty is large, and cost and precision are pind down.
Therefore, for conveying grain into storehouse environment, develop a kind of structure simple, effectively, utilize the method for the moisture in microwave on-line measurement grain to be a problem demanding prompt solution.
Summary of the invention
The embodiment provides a kind of method and apparatus utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content, with convenient, effectively utilize microwave and whether exceed standard at X-ray inspection X Measurement for Grain Moisture Content.
The invention provides following scheme:
One utilizes microwave at the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content, comprising:
Produce two-way same frequency, same-phase and the microwave signal with amplitude, a road microwave signal is transmitted through reference channel; Another road microwave signal is transmitted through current channel, and described reference channel is identical with the structure of described current channel, and the material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage;
Receive the two way microwave signals exported in described reference channel and current channel, obtain Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis;
According to the Amplitude Ratio between described two way microwave signals and phase differential, judge whether the moisture of the grain in described current channel exceeds standard.
Described generation two-way same frequency, same-phase and the microwave signal with amplitude, comprising:
The microwave signal of certain frequency is produced by microwave signal generation unit, by described microwave signal transmission to power amplifier, described power amplifier carries out amplification process to the power of the microwave signal received, to the microwave signal transmission after processing be amplified to power divider, described power divider is divided into two the microwave signal after amplification, produce two-way same frequency, same-phase and the microwave signal with amplitude, export described two way microwave signals at the output terminal of described power splitter.
A described road microwave signal is transmitted through reference channel; Another road microwave signal is transmitted through current channel, and described reference channel is identical with the structure of described current channel, and the material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage, and comprising:
The on all four passage of two line structures is set: reference channel and current channel, emitting antenna is comprised respectively in reference channel and current channel, material, receiving antenna and coaxial cable, wherein said emitting antenna is connected by the output terminal of coaxial cable with described power splitter, the microwave signal that the output terminal receiving described power splitter exports, the microwave signal received sends by described emitting antenna, described microwave signal passes material at reference channel and current channel inside, received by described receiving antenna, the microwave signal received is passed through Output with coaxial line by described receiving antenna.
The two way microwave signals exported in the described reference channel of described reception and current channel, obtains Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis, comprising:
The two way microwave signals of described reference channel and current channel output is received by microwave signal process unit, after this unit receives two way microwave signals, amplitude and the phase data of described two way microwave signals is obtained respectively by the amplitude detection of described microwave signal process unit inside and phase discriminator, pass through comparer, the amplitude of contrast two way microwave signals and phase data, analyze the Amplitude Ratio between two way microwave signals and phase differential, described Amplitude Ratio and phase differential are carried out A/D conversion, and the Amplitude Ratio after being changed by A/D and phase differential export;
If be F by the amplitude after the A/D of the microwave signal of current channel changes
1, phase value is δ
1, the amplitude of the microwave signal after changing by reference to the A/D of passage is F
2, phase value is δ
2.Then by the microwave signal of current channel and by reference to passage microwave signal between A/D change after Amplitude Ratio be: lg (F1/F2), phase differential is δ
1-δ
2.
Described according to the Amplitude Ratio between described two way microwave signals and phase differential, judge whether the moisture of the grain in described current channel exceeds standard, and comprising:
The Amplitude Ratio between the two way microwave signals of A/D conversion described microwave signal process unit exported and phase differential are uploaded to host computer, host computer according to the amplitude after A/D conversion process when phase differential judge whether current channel Measurement for Grain Moisture Content exceeds standard;
If: lg (F1/F2) <0, and, δ
1-δ
2>0, then judge that the moisture of the grain in described current channel exceeds standard;
If: lg (F1/F2) >0, and δ
1-δ
2<0, then judge that the moisture of the grain in current channel does not exceed standard.
The device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content, comprising:
Microwave signal generation unit, for generation of two-way same frequency, same-phase and the microwave signal with amplitude;
Microwave signal transmission unit, for a road microwave signal is transmitted through reference channel, another road microwave signal is transmitted through current channel, described reference channel is identical with the structure of described current channel, material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage;
Microwave signal process unit, for receiving the two way microwave signals exported in described reference channel and current channel, obtains Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis;
Moisture judging unit, for the Amplitude Ratio between the two way microwave signals that obtains according to described Amplitude Ratio and phase differential analysis module and phase differential, judges whether the moisture of the grain in described current channel exceeds standard.
Described microwave signal generation unit, for generation of the microwave signal of certain frequency, by described microwave signal transmission to power amplifier, described power amplifier carries out amplification process to the power of the microwave signal received, to the microwave signal transmission after processing be amplified to power divider, described power divider is divided into two the microwave signal after amplification, produces two-way same frequency, same-phase and the microwave signal with amplitude, exports described two way microwave signals at the output terminal of described power splitter.
Described microwave signal transmission unit, for arranging the on all four passage of two line structures: reference channel and current channel, emitting antenna is comprised respectively in reference channel and current channel, material, receiving antenna and coaxial cable, wherein said emitting antenna is connected by the output terminal of coaxial cable with described power splitter, the microwave signal that the output terminal receiving described power splitter exports, the microwave signal received sends by described emitting antenna, described microwave signal passes material at reference channel and current channel inside, received by described receiving antenna, the microwave signal received is passed through Output with coaxial line by described receiving antenna.
Described microwave signal process unit, for receiving the two way microwave signals of described reference channel and current channel output, amplitude and the phase data of described two way microwave signals is obtained respectively by amplitude detection and phase discriminator, pass through comparer, the amplitude of contrast two way microwave signals and phase data, analyze the Amplitude Ratio between two way microwave signals and phase differential, described Amplitude Ratio and phase differential are carried out A/D conversion, the Amplitude Ratio after being changed by A/D and phase differential export;
If be F by the amplitude after the A/D of the microwave signal of current channel changes
1, phase value is δ
1, the amplitude after changing by reference to the A/D of the microwave signal of passage is F
2, phase value is δ
2.Then by the microwave signal of current channel and by reference to passage microwave signal between A/D change after Amplitude Ratio be: lg (F1/F2), phase differential is δ
1-δ
2.
Described moisture judging unit, for the amplitude after the A/D conversion process that exports according to described microwave signal process unit when phase differential judge whether current channel Measurement for Grain Moisture Content exceeds standard;
If: lg (F1/F2) >0, and, δ
1-δ
2>0, then judge that the moisture of the grain in described current channel exceeds standard;
If: lg (F1/F2) <0, and, δ
1-δ
2<0, then judge that the moisture of the grain in current channel does not exceed standard.
The technical scheme provided as can be seen from the embodiment of the invention described above, the embodiment of the present invention, by using and the on all four contrast passage of sense channel, ensures that the part that in two passages, radiating circuit is identical has identical phase shift and decay.Whether two-way Received signal strength is easier to detect by the size of the energy loss that produces in grain process and phase-shift phase, thus can facilitate, utilize microwave to exceed standard in X-ray inspection X food moisture of putting out cereal effectively, intuitively.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of microwave that utilizes that Fig. 1 provides for the embodiment of the present invention one is in the principle schematic of the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content;
A kind of microwave that utilizes that Fig. 2 provides for the embodiment of the present invention one is at the processing flow chart of the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content;
The specific implementation structural drawing of a kind of device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content that Fig. 3 provides for the embodiment of the present invention two, in figure, microwave signal generation unit 31, microwave signal transmission unit 32, microwave signal process unit 33, moisture judging unit 34.
Embodiment
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing for several specific embodiment, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment one
This embodiment offers a kind of utilize microwave the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content principle schematic as shown in Figure 1, concrete treatment scheme as shown in Figure 2, comprises following treatment step:
Step S210, by microwave signal generation unit produce microwave signal.
Microwave signal generation unit produces the microwave signal of certain frequency, and this microwave signal is more responsive to moisture, and the trace change of moisture all can cause the considerable change of the amplitude of microwave signal and phase place.Above-mentioned certain frequency can be 2.45GHz, 9.3GHz.Microwave signal generation unit by microwave signal transmission to power amplifier.
Step S220, power amplifier carry out amplification process to the power of the microwave signal received, and make microwave signal meet the power requirement launching and penetrate certain thickness (such as 5 centimetres) grain.Power amplifier will amplify the microwave signal transmission after processing to power divider, and power divider is divided into two the microwave signal after amplification, produces two-way same frequency, same-phase and the microwave signal with amplitude.Power, the phase place of the two way microwave signals exported at the output terminal of power splitter are identical.
Step S230, the embodiment of the present invention arrange the on all four passage of two line structures: reference channel and current channel, comprise emitting antenna, material, receiving antenna and coaxial cable respectively in reference channel and current channel.Wherein emitting antenna is connected with the output terminal of power splitter by coaxial cable, the microwave signal that the output terminal receiving power splitter exports, and the microwave signal received sends by emitting antenna, and this microwave signal passes material at reference channel and current channel inside.
Microwave signal is by after material, and received antenna receives.The microwave signal received is drawn out to microwave signal process unit by coaxial cable by receiving antenna.For reference channel and current channel, the specification of coaxial cable is identical with length; Launch, receiving antenna is identical; Material carrier (being conveying belt for conveying grain into storehouse process) specification (comprising material, thickness etc.) is identical; Material thickness is identical, comprises volume of material in the antenna zone of action identical; Emitting antenna, material, and material, receiving antenna spacing correspondence are identical.Material in reference channel is the grain of the most high moisture content being applicable to putting in storage, and the material in current channel is grain to be put in storage, and the kind of grain in reference channel is identical with the kind of the grain to be put in storage in current channel.
Step S240, microwave signal process unit receive the two way microwave signals exported in reference channel and current channel, are obtained Amplitude Ratio and the phase differential of two way microwave signals by com-parison and analysis.
Microwave signal process unit can be regarded as a module, this module 2 is entered 2 and is gone out, be input as two way microwave signals, after this unit receives two way microwave signals, by amplitude detection and the phase discrimination function of inside, obtain amplitude and the phase data of two way microwave signals respectively, then comparer is passed through, the amplitude of contrast two way microwave signals and phase data, analyze the Amplitude Ratio between two way microwave signals and phase differential, described Amplitude Ratio and phase differential are carried out A/D (mould/number) to change, the Amplitude Ratio after being changed by A/D and phase differential export.
If be F by the amplitude after the A/D of the microwave signal of current channel changes
1, phase value is δ
1, the amplitude after changing by reference to the A/D of the microwave signal of passage is F
2, phase value is δ
2.Then by the microwave signal of current channel and by reference to passage microwave signal between A/D change after Amplitude Ratio be: lg (F1/F2), phase differential is δ
1-δ
2.
Amplitude Ratio between the two way microwave signals changed through A/D and phase differential are sent into host computer by step S250, microwave signal process unit.Host computer according to the amplitude after A/D conversion process when phase differential judge whether current channel Measurement for Grain Moisture Content exceeds standard.
If relative to reference channel, the logarithmic form of amplitude difference is less than 0, that is: lg (F1/F2) <0
And phase differential is positive number, that is: δ
1-δ
2>0
Then illustrate that the microwave signal of identical parameters is greater than the amplitude fading by reference to passage by the amplitude fading of current channel, and microwave signal is greater than the phase value of microwave signal by reference to passage by the phase value of current channel, then the moisture of the grain in current channel exceeds standard;
Otherwise, if: lg (F1/F2) <0, and δ
1-δ
2<0, then judge that the moisture of the grain in current channel does not exceed standard, and the water satisfied of the grain in current channel puts in storage demand.
Embodiment two
This embodiment offers a kind of device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content, its specific implementation structure as shown in Figure 3, specifically can comprise following module:
Microwave signal generation unit 31, for generation of two-way same frequency, same-phase and the microwave signal with amplitude;
Microwave signal transmission unit 32, for a road microwave signal is transmitted through reference channel, another road microwave signal is transmitted through current channel, described reference channel is identical with the structure of described current channel, material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage;
Microwave signal process unit 33, for receiving the two way microwave signals exported in described reference channel and current channel, obtains Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis;
Moisture judging unit 34, for the Amplitude Ratio between the two way microwave signals that obtains according to described Amplitude Ratio and phase differential analysis module and phase differential, judges whether the moisture of the grain in described current channel exceeds standard.
Further, described microwave signal generation unit 31, for generation of the microwave signal of certain frequency, by described microwave signal transmission to power amplifier, described power amplifier carries out amplification process to the power of the microwave signal received, to the microwave signal transmission after processing be amplified to power divider, described power divider is divided into two the microwave signal after amplification, produce two-way same frequency, same-phase and the microwave signal with amplitude, export described two way microwave signals at the output terminal of described power splitter.
Further, described microwave signal transmission unit 32, for arranging the on all four passage of two line structures: reference channel and current channel, emitting antenna is comprised respectively in reference channel and current channel, material, receiving antenna and coaxial cable, wherein said emitting antenna is connected by the output terminal of coaxial cable with described power splitter, the microwave signal that the output terminal receiving described power splitter exports, the microwave signal received sends by described emitting antenna, described microwave signal passes material at reference channel and current channel inside, received by described receiving antenna, the microwave signal received is passed through Output with coaxial line by described receiving antenna.
Further, described microwave signal process unit 33, for receiving the two way microwave signals of described reference channel and current channel output, amplitude and the phase data of described two way microwave signals is obtained respectively by amplitude detection and phase discriminator, by comparer, the amplitude of contrast two way microwave signals and phase data, analyze the Amplitude Ratio between two way microwave signals and phase differential, described Amplitude Ratio and phase differential are carried out A/D conversion, and the Amplitude Ratio after being changed by A/D and phase differential export;
If be F by the amplitude of the microwave signal of current channel
1, phase value is δ
1, the amplitude by reference to the microwave signal of passage is F
2, phase value is δ
2.Then by the microwave signal of current channel and by reference to passage microwave signal between A/D change after Amplitude Ratio be: lg (F1/F2), phase differential is δ
1-δ
2.
Further, described moisture judging unit 34, for the amplitude after the A/D conversion process that exports according to described microwave signal process unit when phase differential judge whether current channel Measurement for Grain Moisture Content exceeds standard;
If: lg (F1/F2) <0, and, δ
1-δ
2>0, then judge that the moisture of the grain in described current channel exceeds standard;
If: lg (F1/F2) >0, and, δ
1-δ
2<0, then judge that the moisture of the grain in current channel does not exceed standard.
The detailed process of carrying out utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content with the device of the embodiment of the present invention and preceding method embodiment similar, repeat no more herein.
In sum, the embodiment of the present invention, by using and the on all four contrast passage of sense channel, ensures that the part that in two passages, radiating circuit is identical has identical phase shift and decay.Whether two-way Received signal strength is easier to detect by the size of the energy loss that produces in grain process and phase-shift phase, thus can facilitate, utilize microwave to exceed standard in X-ray inspection X food moisture of putting out cereal effectively, intuitively.
Embodiment of the present invention testing circuit easily realizes, and accuracy of detection is higher, affected by environmently greatly reduces, and structure is more easy, and testing result is more reliable effectively, and cost is more conducive to apply while reducing.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device or system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.Apparatus and system embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. utilize microwave at the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content, it is characterized in that, comprising:
Produce two-way same frequency, same-phase and the microwave signal with amplitude, a road microwave signal is transmitted through reference channel; Another road microwave signal is transmitted through current channel, and described reference channel is identical with the structure of described current channel, and the material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage;
Receive the two way microwave signals exported in described reference channel and current channel, obtain Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis;
According to the Amplitude Ratio between described two way microwave signals and phase differential, judge whether the moisture of the grain in described current channel exceeds standard.
2. the microwave that utilizes according to claim 1 is at the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content, and it is characterized in that, described generation two-way same frequency, same-phase and the microwave signal with amplitude, comprising:
The microwave signal of certain frequency is produced by microwave signal generation unit, by described microwave signal transmission to power amplifier, described power amplifier carries out amplification process to the power of the microwave signal received, to the microwave signal transmission after processing be amplified to power divider, described power divider is divided into two the microwave signal after amplification, produce two-way same frequency, same-phase and the microwave signal with amplitude, export described two way microwave signals at the output terminal of described power splitter.
3. the microwave that utilizes according to claim 2 is at the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content, and it is characterized in that, a described road microwave signal is transmitted through reference channel; Another road microwave signal is transmitted through current channel, and described reference channel is identical with the structure of described current channel, and the material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage, and comprising:
The on all four passage of two line structures is set: reference channel and current channel, emitting antenna is comprised respectively in reference channel and current channel, material, receiving antenna and coaxial cable, wherein said emitting antenna is connected by the output terminal of coaxial cable with described power splitter, the microwave signal that the output terminal receiving described power splitter exports, the microwave signal received sends by described emitting antenna, described microwave signal passes material at reference channel and current channel inside, received by described receiving antenna, the microwave signal received is passed through Output with coaxial line by described receiving antenna.
4. according to claim 1 or 2 or 3, utilize microwave at the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content, it is characterized in that, the two way microwave signals exported in the described reference channel of described reception and current channel, obtain Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis, comprising:
The two way microwave signals of described reference channel and current channel output is received by microwave signal process unit, after this unit receives two way microwave signals, amplitude and the phase data of described two way microwave signals is obtained respectively by the amplitude detection of described microwave signal process unit inside and phase discriminator, pass through comparer, the amplitude of contrast two way microwave signals and phase data, analyze the Amplitude Ratio between two way microwave signals and phase differential, described Amplitude Ratio and phase differential are carried out A/D conversion, and the Amplitude Ratio after being changed by A/D and phase differential export;
If be F by the amplitude after the A/D of the microwave signal of current channel changes
1, phase value is δ
1, the amplitude of the microwave signal after changing by reference to the A/D of passage is F
2, phase value is δ
2.Then by the microwave signal of current channel and by reference to passage microwave signal between A/D change after Amplitude Ratio be: lg (F1/F2), phase differential is δ
1-δ
2.
5. the microwave that utilizes according to claim 4 is at the whether super calibration method of X-ray inspection X Measurement for Grain Moisture Content, it is characterized in that, described according to the Amplitude Ratio between described two way microwave signals and phase differential, judge whether the moisture of the grain in described current channel exceeds standard, and comprising:
The Amplitude Ratio between the two way microwave signals of A/D conversion described microwave signal process unit exported and phase differential are uploaded to host computer, host computer according to the amplitude after A/D conversion process when phase differential judge whether current channel Measurement for Grain Moisture Content exceeds standard;
If: lg (F1/F2) <0, and, δ
1-δ
2>0, then judge that the moisture of the grain in described current channel exceeds standard;
If: lg (F1/F2) >0, and δ
1-δ
2<0, then judge that the moisture of the grain in current channel does not exceed standard.
6. the device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content, is characterized in that, comprising:
Microwave signal generation unit, for generation of two-way same frequency, same-phase and the microwave signal with amplitude;
Microwave signal transmission unit, for a road microwave signal is transmitted through reference channel, another road microwave signal is transmitted through current channel, described reference channel is identical with the structure of described current channel, material in described current channel is grain to be put in storage, and the material in described reference channel is the grain of the most high moisture content being applicable to putting in storage;
Microwave signal process unit, for receiving the two way microwave signals exported in described reference channel and current channel, obtains Amplitude Ratio between two way microwave signals that described reference channel and current channel export and phase differential by com-parison and analysis;
Moisture judging unit, for the Amplitude Ratio between the two way microwave signals that obtains according to described Amplitude Ratio and phase differential analysis module and phase differential, judges whether the moisture of the grain in described current channel exceeds standard.
7. the device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content according to claim 6, is characterized in that:
Described microwave signal generation unit, for generation of the microwave signal of certain frequency, by described microwave signal transmission to power amplifier, described power amplifier carries out amplification process to the power of the microwave signal received, to the microwave signal transmission after processing be amplified to power divider, described power divider is divided into two the microwave signal after amplification, produces two-way same frequency, same-phase and the microwave signal with amplitude, exports described two way microwave signals at the output terminal of described power splitter.
8. the device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content according to claim 6, is characterized in that:
Described microwave signal transmission unit, for arranging the on all four passage of two line structures: reference channel and current channel, emitting antenna is comprised respectively in reference channel and current channel, material, receiving antenna and coaxial cable, wherein said emitting antenna is connected by the output terminal of coaxial cable with described power splitter, the microwave signal that the output terminal receiving described power splitter exports, the microwave signal received sends by described emitting antenna, described microwave signal passes material at reference channel and current channel inside, received by described receiving antenna, the microwave signal received is passed through Output with coaxial line by described receiving antenna.
9. the device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content according to claim 6 or 7 or 8, is characterized in that:
Described microwave signal process unit, for receiving the two way microwave signals of described reference channel and current channel output, amplitude and the phase data of described two way microwave signals is obtained respectively by amplitude detection and phase discriminator, pass through comparer, the amplitude of contrast two way microwave signals and phase data, analyze the Amplitude Ratio between two way microwave signals and phase differential, described Amplitude Ratio and phase differential are carried out A/D conversion, the Amplitude Ratio after being changed by A/D and phase differential export;
If be F by the amplitude after the A/D of the microwave signal of current channel changes
1, phase value is δ
1, the amplitude after changing by reference to the A/D of the microwave signal of passage is F
2, phase value is δ
2.Then by the microwave signal of current channel and by reference to passage microwave signal between A/D change after Amplitude Ratio be: lg (F1/F2), phase differential is δ
1-δ
2.
10. the device utilizing microwave whether to exceed standard at X-ray inspection X Measurement for Grain Moisture Content according to claim 9, is characterized in that:
Described moisture judging unit, for the amplitude after the A/D conversion process that exports according to described microwave signal process unit when phase differential judge whether current channel Measurement for Grain Moisture Content exceeds standard;
If: lg (F1/F2) >0, and, δ
1-δ
2>0, then judge that the moisture of the grain in described current channel exceeds standard;
If: lg (F1/F2) <0, and, δ
1-δ
2<0, then judge that the moisture of the grain in current channel does not exceed standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465568.0A CN105424727B (en) | 2014-09-12 | 2014-09-12 | Method and device for online testing whether grain moisture content exceeds standard by utilizing microwave |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465568.0A CN105424727B (en) | 2014-09-12 | 2014-09-12 | Method and device for online testing whether grain moisture content exceeds standard by utilizing microwave |
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| Publication Number | Publication Date |
|---|---|
| CN105424727A true CN105424727A (en) | 2016-03-23 |
| CN105424727B CN105424727B (en) | 2019-12-24 |
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| CN201410465568.0A Active CN105424727B (en) | 2014-09-12 | 2014-09-12 | Method and device for online testing whether grain moisture content exceeds standard by utilizing microwave |
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| JP2021023491A (en) * | 2019-08-02 | 2021-02-22 | 学校法人 東洋大学 | Radio wave type moisture meter and biological information measurement device |
| CN112798621A (en) * | 2020-12-25 | 2021-05-14 | 孟敏 | Icing and dewing detection device and method based on S-shaped microwave transmission line |
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