CN106153165A - The Weighing method of silo material, system and device - Google Patents
The Weighing method of silo material, system and device Download PDFInfo
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- CN106153165A CN106153165A CN201510203222.8A CN201510203222A CN106153165A CN 106153165 A CN106153165 A CN 106153165A CN 201510203222 A CN201510203222 A CN 201510203222A CN 106153165 A CN106153165 A CN 106153165A
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Abstract
The invention discloses the Weighing method of a kind of silo material, system and device, Weighing method comprises the steps: for containing placement microwave module above the silo of material；Obtain distance H between the bottom surface of described microwave module and described silo inner chamber；Described microwave module launches microwave signal, and receive the reflected signal that the described material surface in described silo inner chamber is reflected, obtain the transmitting of described microwave signal and described reflected signal and receive time difference Ta, and calculate distance B between the described material surface in described microwave module and described silo inner chamber according to formula B=c × Ta/2, wherein, c is microwave speed；And weight m according to the described material in formula m=S × (H-B) × ρ described silo of calculating, wherein, S is the cross-sectional area of silo inner chamber, and ρ is the proportion of described material.The Weighing method of this silo material solves existing Weighing method and system is installed and keeps in repair the problem inconvenient, potential safety hazard is big.
Description
Technical field
The present invention relates to the field of weighing, particularly relate to the Weighing method of a kind of silo material, system and device.
Background technology
At present, the Weighing method of silo material is that LOAD CELLS is arranged on bottom silo, it is necessary to weighing
Sensor is arranged on bottom silo, it is necessary to whole silo is propped up, and so installs and keep in repair extremely inconvenient, and
Under the situation of bad environments, it is unable to reach requirement, all cannot be carried out when vibration, temperature, wind-force
Work.Great potential safety hazard is there is in particularly some super-high silos in installation and use process.
Summary of the invention
For above-mentioned prior art present situation, the present invention provides the Weighing method of a kind of silo material, system and dress
Put, solve existing Weighing method and system is installed and keeps in repair the problem inconvenient, potential safety hazard is big.
In order to solve above-mentioned technical problem, the Weighing method of a kind of silo material provided by the present invention, including
Following steps:
For containing placement microwave module above the silo of material；
Obtain distance H between the bottom surface of described microwave module and described silo inner chamber；
Described microwave module launches microwave signal, and receives the described material surface in described silo inner chamber
The reflected signal of reflection, it is thus achieved that described microwave signal and the transmitting of described reflected signal and reception time difference Ta,
And calculate between the described material surface in described microwave module and described silo inner chamber according to formula B=c × Ta/2
Distance B, wherein, c is microwave speed；And
According to weight m of the described material in formula m=S × (H-B) × ρ described silo of calculating, wherein,
S is the cross-sectional area of silo inner chamber, and ρ is the proportion of described material.
Wherein in an embodiment, it is thus achieved that between the bottom surface of described microwave module and described silo inner chamber away from
Specific as follows from H:
Described microwave module launches microwave signal, and receives the described material surface of intracavity in described silo
The reflected signal of reflection, it is thus achieved that described microwave signal and the transmitting of described reflected signal and reception time difference Tb,
And calculate described H according to formula H=c × Tb/2；Wherein, c is microwave speed.
Wherein in an embodiment, the Weighing method of described silo material also includes:
The transmission of described weight m is shown to display.
The weighing system of a kind of silo material provided by the present invention, including:
For containing the silo of material；
Microwave module, described microwave module is placed on the top of described silo, and described microwave module launches microwave
Signal, and receive the reflected signal that the described material surface in described silo inner chamber is reflected, it is thus achieved that described
The transmitting of microwave signal and described reflected signal and receive time difference Ta, and calculate institute according to formula B=c × Ta/2
State distance B between the described material surface in microwave module and described silo inner chamber, and export distance signal,
Wherein, c is microwave speed；
Signal processing module, the input of described signal processing module is connected with the outfan of described microwave module,
For receiving described distance signal, and described distance signal is converted into the distance that monolithic function receives and processes
Signal；And
One-chip computer module, the input of described one-chip computer module is connected with the outfan of described signal processing module,
For receiving described distance signal, and according to formula m=S × (H-B) × ρ calculate in described silo described
Weight m of material, wherein, S is the cross-sectional area of silo inner chamber, and ρ is the proportion of described material.
Wherein in an embodiment, described signal processing module includes:
Filtration module, the input of described filtration module is connected with the outfan of described microwave module；
I/V conversion module, the input of described I/V conversion module is connected with the outfan of described filtration module；
And
The outfan of A/D modular converter, the input of described A/D modular converter and described I/V conversion module
Being connected, the outfan of described A/D modular converter is connected with the input of described one-chip computer module.
Wherein in an embodiment, the weighing system of described silo material also includes:
Display module, the input of described display module is connected with the outfan of described one-chip computer module；With
Input module, the outfan of described input module is connected with the input of described one-chip computer module.
Wherein in an embodiment, the weighing system of described silo material also includes:
Alarm module, the input of described alarm module is connected with the outfan of described one-chip computer module.
Wherein in an embodiment, the weighing system of described silo material also includes:
Data interface module, described data interface module is connected with described one-chip computer module.
The weighing device of a kind of silo material provided by the present invention, including:
Mounting seat；
Shell, described shell is arranged on above described mounting seat by connecting tube；
Microwave module, described microwave module includes microwave transmitting antenna and receives device and microwave circuit module,
Described microwave transmitting antenna and reception device are arranged on below described mounting seat, and described microwave circuit module is arranged
In described shell, and described microwave circuit module is connected with described microwave transmitting antenna and reception device, institute
State microwave circuit module and by described microwave transmitting antenna and receive device transmitting microwave signal, and by described
Microwave transmitting antenna and reception device receive the reflection of the described material surface reflection in described silo inner chamber
Signal, it is thus achieved that described microwave signal and the transmitting of described reflected signal and reception time difference Ta, and according to formula
B=c × Ta/2 calculates distance B between the described material surface in described microwave module and described silo inner chamber,
And export distance signal, wherein, c is microwave speed；
Signal processing module, described signal processing module is arranged in described shell, described signal processing module
Input be connected with the outfan of described microwave module, be used for receiving described distance signal, and by described away from
It is converted into the distance signal that monolithic function receives and processes from signal；And
One-chip computer module, described one-chip computer module is arranged in described shell, the input of described one-chip computer module
End is connected with the outfan of described signal processing module, is used for receiving described distance signal, and according to formula m=S
× (H-B) × ρ calculates weight m of the described material in described silo, and wherein, S is the horizontal stroke of silo inner chamber
Sectional area, ρ is the proportion of described material.
Wherein in an embodiment, the weighing device of described silo material also includes:
Display module, described display module is arranged on described shell, and the input of described display module with
The outfan of described one-chip computer module is connected；With
Input module, described input module is arranged on described shell, and the outfan of described input module with
The input of described one-chip computer module is connected.
Compared with prior art, the Weighing method of the silo material of the present invention, system and device, pass through microwave
Module measures distance B between the described material surface in microwave module and silo inner chamber, then by distance B
Indirectly calculate weight m under the online situation of described material in silo, carry out online production management, solve
The problem that cannot realize by Weighing, such as the stock control of large-scale transfer storage facility, concrete mixing plant, building
Online production management, the silo production such as grain processing, Chemical Manufacture manage, by the title of this silo material
Weighing method reaches active dataization management, thus reduces production cost, saves substantial amounts of manpower and material consumption.
Additionally, use low-yield and extremely short microwave measurement distance, compared to distance measuring methods such as infrared ray, have anti-
Interference effect is good, measures accurate effect.
Additional technical feature of the present invention is had the advantage that will enter in this specification detailed description of the invention part
Row explanation.
Accompanying drawing explanation
Fig. 1 is the flow chart of the Weighing method of the silo material in the embodiment of the present invention；
Silo that Fig. 2 is used by the Weighing method of the silo material in the embodiment of the present invention and microwave module
Structural representation；
Fig. 3 is the block diagram of the weighing system of the silo material in the embodiment of the present invention；
Fig. 4 is the master of the weighing device of the silo material of the weighing system of the silo material in the embodiment of the present invention
TV structure schematic diagram；
Fig. 5 is the vertical of the weighing device of the silo material of the weighing system of the silo material in the embodiment of the present invention
Body structural representation.
Description of reference numerals: 1, silo；1a, the bottom surface of silo；2, microwave module；21, microwave circuit
Module；3, material；4, signal processing module；41, filtration module；42, I/V conversion module；43、A/D
Modular converter；5, one-chip computer module；6, display module；7, alarm module；8, data interface module；9、
Input module；10, microwave transmitting antenna and reception device；11, mounting seat；12, shell；13, connect
Pipe；14, installing rack.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in detail.It should be noted that not
In the case of conflict, the feature in following embodiment and embodiment can be mutually combined.
Silo material in the present invention refers to the material being suitable for being contained in silo, such as: powder, granule and
Liquid.
Embodiment one
In the present embodiment, it is provided that the Weighing method of a kind of silo material, Fig. 1 is the Weighing method of silo material
Flow chart, silo 1 that Fig. 2 is used by the Weighing method of the silo material in the embodiment of the present invention and micro-
The structural representation of mode block 2.As shown in Figure 1, 2, the Weighing method of described silo material includes walking as follows
Rapid:
Step S1, for containing above the silo 1 of material 3 placement microwave module 2.
Step S2, distance H obtained between the bottom surface 1a of described microwave module 2 and described silo 1 inner chamber.
More preferably, it is thus achieved that distance H between the bottom surface 1a of described microwave module 2 and described silo 1 inner chamber is concrete such as
Under:
Described microwave module 2 launches microwave signal, and receives the described material 3 of intracavity in described silo 1
The reflected signal of surface reflection, it is thus achieved that described microwave signal and the transmitting of described reflected signal and reception time difference
Tb, and calculate described H according to formula H=c × Tb/2；Wherein, c is microwave speed.
Certainly, in addition to using microwave module 2 to measure described H, it is also possible to use alternate manner, such as
Use tape measure.
Step S3, described microwave module 2 launch microwave signal, and receive in described silo 1 inner chamber
The reflected signal of described material 3 surface reflection, it is thus achieved that the transmitting of described microwave signal and described reflected signal and
Receive time difference Ta, and calculate in described microwave module 2 and described silo 1 inner chamber according to formula B=c × Ta/2
Described material 3 surface between distance B, wherein, c is microwave speed.
Step S4, calculate described material 3 in described silo 1 according to formula m=S × (H-B) × ρ
Weight m, wherein, S is the cross-sectional area of silo 1 inner chamber, and ρ is the proportion of described material 3.
The Weighing method of the silo material of the present invention, measures microwave module 2 and silo 1 by microwave module 2
Distance B between described material 3 surface in inner chamber, more indirectly calculated in silo 1 by distance B
Weight m under the described online situation of material 3, carries out online production management, and solving cannot by Weighing
The problem realized, such as the stock control of large-scale transfer storage facility, concrete mixing plant, the online production management in building,
The silo production such as grain processing, Chemical Manufacture manages, and reaches existing number by the Weighing method of this silo material
According to changing management, thus reduce production cost, save substantial amounts of manpower and material consumption.Additionally, use low-yield
And extremely short microwave measurement distance, compared to distance measuring methods such as infrared ray, there is anti-jamming effectiveness good, measure
Accurate effect.
More preferably, the Weighing method of described silo material also includes showing the transmission of described weight m to display,
So can intuitively obtain weight m of described material 3 in described silo 1, to facilitate management.
Embodiment two
In the present embodiment, it is provided that the weighing system of a kind of silo material, Fig. 3 is that weighing of this silo material is
The block diagram of system.As it is shown on figure 3, the weighing system of silo material includes microwave module 2, signal processing module
4 and one-chip computer module 5, wherein, described microwave module 2 is placed on for containing above the silo 1 of material 3,
Described microwave module 2 launches microwave signal, and receives described material 3 table in described silo 1 inner chamber
The reflected signal of face reflection, it is thus achieved that described microwave signal and the transmitting of described reflected signal and reception time difference Ta,
And calculate described microwave module 2 and described material 3 table in described silo 1 inner chamber according to formula B=c × Ta/2
Distance B between face, and export distance signal, wherein, c is microwave speed.
The input of described signal processing module 4 is connected with the outfan of described microwave module 2, is used for receiving
Described distance signal, and described distance signal is converted into the distance signal that monolithic function receives and processes.Relatively
Excellently, described signal processing module 4 includes filtration module 41, I/V conversion module 42 and A/D modular converter
43, the input of described filtration module 41 is connected with the outfan of described microwave module 2, for described away from
From signal filtering, remove interference signal；The input of described I/V conversion module 42 and described filtration module 41
Outfan be connected, for described distance signal is converted into voltage signal；Described A/D modular converter 43
Input is connected with the outfan of described I/V conversion module 42, the outfan of described A/D modular converter 43
It is connected with the input of described one-chip computer module 5, for the simulation letter that described A/D modular converter 43 is exported
Number it is converted into digital signal.Being processed by signal processing module signal of adjusting the distance, distance signal is by place
After reason, precision can reach grade.
The input of described one-chip computer module 5 is connected with the outfan of described signal processing module 4, is used for connecing
Receive described distance signal, and calculate the described material in described silo 1 according to formula m=S × (H-B) × ρ
Weight m of 3, wherein, S is the cross-sectional area of silo 1 inner chamber, and ρ is the proportion of described material 3.
More preferably, the weighing system of described silo material also includes display module 6 and input module 9, described aobvious
Show that the input of module 6 is connected with the outfan of described one-chip computer module 5, in display silo 1 in real time
Weight m of material 3.Display module 6 can be LCDs.Can be real-time by display module 6
Observe the weight of material 3 in silo 1, reach the purpose of field dataization management；Described input module 9
Outfan be connected with the input of described one-chip computer module 5.
More preferably, the weighing system of described silo material also includes alarm module 7, described alarm module 7 defeated
Enter end to be connected with the outfan of described one-chip computer module 5.Alarm module 7 can be voice guard or sound
Light crossing-signal.The more or less alarm of weight m of the alarm module 7 material 3 in silo 1, to carry
Wake up field personnel, it is achieved automated management.
More preferably, the weighing system of described silo material also includes data interface module 8, described data-interface mould
Block 8 is connected with described one-chip computer module 5.It is connected with host computer by data interface module 8, so manages
Personnel on computers can be with weight m of the material 3 in Real Time Observation to silo 1, convenient management.
To sum up, the weighing system of the silo material of the present invention, by microwave module 2 measure microwave module 2 with
Distance B between described material 3 surface in silo 1 inner chamber, more indirectly calculate silo 1 by distance B
Interior weight m under the online situation of described material 3, carries out online production management, solves by Weighing
The problem that cannot realize, such as the stock control of large-scale transfer storage facility, concrete mixing plant, the online production pipe in building
Reason, the silo production such as grain processing, Chemical Manufacture manages, and reaches existing by the Weighing method of this silo material
Row datumization manages, thus reduces production cost, saves substantial amounts of manpower and material consumption.Additionally, use low
Energy and extremely short microwave measurement distance, compared to distance measuring methods such as infrared ray, have anti-jamming effectiveness good,
Measure accurate effect.
Embodiment three
In the present embodiment, it is provided that the weighing device of a kind of silo material, Fig. 4 is the cylinder in the embodiment of the present invention
The main TV structure schematic diagram of the weighing device of the silo material of the weighing system of storehouse material；Fig. 5 is that the present invention is real
Execute the perspective view of the weighing device of the silo material of the weighing system of silo material in example.Such as figure
4, shown in 5, the weighing device of silo material includes at mounting seat 11, shell 12, microwave module 2, signal
Reason module 4 and one-chip computer module 5, described mounting seat 11 is ring flange, and described mounting seat 11 is arranged on silo
On the installing rack 14 at 1 top (see Fig. 2).
Described microwave module 2 includes microwave transmitting antenna and receives device 10 and microwave circuit module 21, described
Microwave transmitting antenna and reception device 10 are arranged on below described mounting seat 11, described microwave circuit module 21
It is arranged in described shell 12, and described microwave circuit module 21 fills with described microwave transmitting antenna and reception
Putting 10 to be connected, described microwave circuit module 21 is launched micro-by described microwave transmitting antenna and reception device 10
Ripple signal, and received in described silo 1 inner chamber by described microwave transmitting antenna and reception device 10
The reflected signal of described material 3 surface reflection, it is thus achieved that the transmitting of described microwave signal and described reflected signal and
Receive time difference Ta, and calculate in described microwave module 2 and described silo 1 inner chamber according to formula B=c × Ta/2
Described material 3 surface between distance B, and export distance signal, wherein, c is microwave speed.
Described signal processing module 4 is arranged in described shell 12, the input of described signal processing module 4
It is connected with the outfan of described microwave module 2, is used for receiving described distance signal, and by described distance signal
It is converted into the distance signal that monolithic function receives and processes.
Described one-chip computer module 5 is arranged in described shell 12, the input of described one-chip computer module 5 and institute
The outfan stating signal processing module 4 is connected, and is used for receiving described distance signal, and according to formula m=S ×
(H-B) × ρ calculates weight m of the described material 3 in described silo 1, and wherein, S is silo 1 inner chamber
Cross-sectional area, ρ is the proportion of described material 3.
More preferably, the weighing device of described silo material also includes that display module 6, described display module 6 are arranged
On described shell 12 surface.Input module 9, described input module 9 is arranged on described shell 12, and
The outfan of described input module 9 is connected with the input of described one-chip computer module 5.
The weighing device of the silo material in the present embodiment is by microwave module 2, signal processing module 4 and single-chip microcomputer
Module 5 integrates, and simple in construction is easy to operate, uses simple, reliable and stable.Only need general during maintenance
Logical adjustable wrench can carry out maintenance work, and staff and time all greatly reduce, and have saved maintenance cost,
Greatly improve work efficiency, also reduce the labor intensity of maintainer, and guarantee the safety of maintainer
Property.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.
Claims (10)
1. the Weighing method of a silo material, it is characterised in that comprise the steps:
Microwave module (2) is placed in the top being used for containing the silo (1) of material (3)；
Obtain distance H between the bottom surface (1a) of described microwave module (2) and described silo (1) inner chamber；
Described microwave module (2) launches microwave signal, and receives the described material in described silo (1) inner chamber
(3) reflected signal of surface reflection, it is thus achieved that described microwave signal and the transmitting of described reflected signal and the time of reception
Difference Ta, and calculate described with described silo (1) inner chamber of described microwave module (2) according to formula B=c × Ta/2
Distance B between material (3) surface, wherein, c is microwave speed；And
According to weight m of the described material (3) in formula m=S × (the H-B) × ρ described silo of calculating (1),
Wherein, S is the cross-sectional area of silo (1) inner chamber, and ρ is the proportion of described material (3).
The Weighing method of silo material the most according to claim 1, it is characterised in that obtain described micro-
Distance H between the bottom surface (1a) of mode block (2) and described silo (1) inner chamber is specific as follows:
Described microwave module (2) launches microwave signal, and receives the described material of intracavity in described silo (1)
(3) reflected signal of surface reflection, it is thus achieved that described microwave signal and the transmitting of described reflected signal and the time of reception
Difference Tb, and calculate described H according to formula H=c × Tb/2；Wherein, c is microwave speed.
The Weighing method of silo material the most according to claim 1, it is characterised in that described in the side of weighing
Method also includes:
The transmission of described weight m is shown to display.
4. the weighing system of a silo material, it is characterised in that including:
For containing the silo (1) of material (3)；
Microwave module (2), described microwave module (2) is placed on the top of described silo (1), described microwave module (2)
Launch microwave signal, and the reflection receiving described material (3) the surface reflection in described silo (1) inner chamber is believed
Number, it is thus achieved that described microwave signal and the transmitting of described reflected signal and reception time difference Ta, and according to formula
B=c × Ta/2 calculates between described material (3) surface in described microwave module (2) and described silo (1) inner chamber
Distance B, and export distance signal, wherein, c is microwave speed；
The output of signal processing module (4), the input of described signal processing module (4) and described microwave module (2)
End is connected, and is used for receiving described distance signal, and described distance signal is converted into the reception of monolithic function and place
The distance signal of reason；And
The output of one-chip computer module (5), the input of described one-chip computer module (5) and described signal processing module (4)
End is connected, and is used for receiving described distance signal, and calculates described silo according to formula m=S × (H-B) × ρ
(1) weight m of the described material (3) in, wherein, S is the cross-sectional area of silo (1) inner chamber, and ρ is described thing
The proportion of material (3).
The weighing system of silo material the most according to claim 4, it is characterised in that at described signal
Reason module (4) including:
Filtration module (41), the outfan phase of the input of described filtration module (41) and described microwave module (2)
Even；
I/V conversion module (42), the input of described I/V conversion module (42) is defeated with described filtration module (41)
Go out end to be connected；And
A/D modular converter (43), the input of described A/D modular converter (43) and described I/V conversion module (42)
Outfan be connected, the outfan of described A/D modular converter (43) and the input of described one-chip computer module (5)
It is connected.
The weighing system of silo material the most according to claim 4, it is characterised in that described in weigh and be
System also includes:
Display module (6), the outfan phase of the input of described display module (6) and described one-chip computer module (5)
Even；With
Input module (9), the input phase of the outfan of described input module (9) and described one-chip computer module (5)
Even.
The weighing system of silo material the most according to claim 4, it is characterised in that described in weigh and be
System also includes:
Alarm module (7), the outfan phase of the input of described alarm module (7) and described one-chip computer module (5)
Even.
The weighing system of silo material the most according to claim 4, it is characterised in that described in weigh and be
System also includes:
Data interface module (8), described data interface module (8) is connected with described one-chip computer module (5).
9. the weighing device of a silo material, it is characterised in that including:
Mounting seat (11)；
Shell (12), described shell (12) is arranged on described mounting seat (11) top by connecting tube (13)；
Microwave module (2), described microwave module (2) includes microwave transmitting antenna and receives device (10) and microwave electricity
Road module (21), described microwave transmitting antenna and reception device (10) are arranged on described mounting seat (11) lower section, institute
State microwave circuit module (21) to be arranged in described shell (12), and described microwave circuit module (21) is micro-with described
Ripple launches antenna and reception device (10) is connected, and described microwave circuit module (21) passes through described microwave transmitting antenna
And receive device (10) transmitting microwave signal, and receive warp by described microwave transmitting antenna and reception device (10)
Cross in described silo (1) inner chamber described material (3) surface reflection reflected signal, it is thus achieved that described microwave signal with
The transmitting of described reflected signal and reception time difference Ta, and calculate described microwave module according to formula B=c × Ta/2
(2) distance B between described material (3) surface and in described silo (1) inner chamber, and export distance signal, its
In, c is microwave speed；
Signal processing module (4), described signal processing module (4) is arranged in described shell (12), described signal
The input of processing module (4) is connected with the outfan of described microwave module (2), is used for receiving described distance signal,
And described distance signal is converted into the distance signal that monolithic function receives and processes；And
One-chip computer module (5), described one-chip computer module (5) is arranged in described shell (12), described single-chip microcomputer mould
The input of block (5) is connected with the outfan of described signal processing module (4), is used for receiving described distance signal,
And according to weight m of the described material (3) in formula m=S × (the H-B) × ρ described silo of calculating (1), its
In, S is the cross-sectional area of silo (1) inner chamber, and ρ is the proportion of described material (3).
The weighing device of silo material the most according to claim 9, it is characterised in that described in weigh
Device also includes:
Display module (6), described display module (6) is arranged on described shell (12), and described display module (6)
Input be connected with the outfan of described one-chip computer module (5)；With
Input module (9), described input module (9) is arranged on described shell (12), and described input module (9)
Outfan be connected with the input of described one-chip computer module (5).
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| EP1830176A1 (en) * | 2006-03-02 | 2007-09-05 | FOSS Analytical AB | Device and method for optical measurement of small particles such as grains from cereals and like crops |
| CN1963377A (en) * | 2006-10-30 | 2007-05-16 | 朱阳明 | Measuring method for amount of grain reserve in grain depot |
| CN201034688Y (en) * | 2007-05-22 | 2008-03-12 | 尚群柱 | Water level monitoring instrument having anti-theft and solar power supply function |
| CN103292693A (en) * | 2013-01-31 | 2013-09-11 | 王录民 | Granary capacity real-time monitoring system |
| CN103307976A (en) * | 2013-04-16 | 2013-09-18 | 杭州先临三维科技股份有限公司 | Monitoring method for grain stock in barn |
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Application publication date: 20161123 |