CN102445261A - Virtual metering method for accurate material cabinet feeding - Google Patents
Virtual metering method for accurate material cabinet feeding Download PDFInfo
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- CN102445261A CN102445261A CN2011102924886A CN201110292488A CN102445261A CN 102445261 A CN102445261 A CN 102445261A CN 2011102924886 A CN2011102924886 A CN 2011102924886A CN 201110292488 A CN201110292488 A CN 201110292488A CN 102445261 A CN102445261 A CN 102445261A
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Abstract
The invention discloses a virtual metering method for accurate material cabinet feeding, and particularly relates to a virtual metering method for accurate material feeding, belonging to the technical field of material weighing. In the method, a PLC (Programmable Logic Controller) stack tracing technology for fixed conveying time of material conveying equipment between a weighing scale in front of a cabinet and a storage cabinet and the accumulation of the metering scale in front of the cabinet under the condition of not arranging any metering device in front of the cabinet is adopted, so that the problem of a relatively large error of the cabinet feeding weight during large-scale batch switching is solved on the premise of ensuring relatively small resource overhead of a PLC electric control system. The cabinet feeding amount metering accuracy of batch storage cabinets is consistent with the metering accuracy of the metering scale in front of the cabinet. Counting and tracking of materials in the storage cabinet and accurate subsequent scheduling of materials are guaranteed. The method is applied in the fields of cigarette industry and weighing of other materials.
Description
Technical field
The present invention relates to the accurate virtual metrology technology of material, be specifically related to the large quantities of accurate virtual metrology technology of advancing cabinet weight when changing cabinet that connected of material, belong to the material weighing technical field.
Background technology
The input of production of cigarettes raw material generally be with certain weight for batch, by batch feeding intake throwing.During every batch of raw material throwing, all have a certain amount of stub bar material tail, be steady quality between guaranteeing batch, in cigarette factory throwing link, the material of the identical trade mark or prescription can be processed continuously.In order pipe tobacco to be carried out quantitative batch quality analysis and comparison, just on time point, carried out the differentiation of batch number.But brought the generation of advancing the inaccurate phenomenon of cabinet weight metering thus.Main cause be batch between when switching, only count first cabinet weight to the current semi-invariant of belt conveyer scale before the perfuming.And the position deviation of belt conveyer scale storage cabinet distance differs before the perfuming; Only send hundreds of kilograms of materials are just arranged on the machine in conveyer belt or shake; Thereby caused large quantities of companies out-of-date; First institute advances to store up the actual input of cabinet and shows than record and lack the hundreds of kilogram, and the second batch of institute advances to store up the actual input ratio of cabinet and write down demonstration and have more hundred kilograms.Give statistics, the tracking of material, the accurate scheduling of follow-up material, proportioning have all been brought fluctuation and influence, are unfavorable for production of cigarettes, need link material weighing technology is improved improve production efficiency and product quality.
Summary of the invention
The object of the invention is to provide that a kind of material is large quantities of when switching between connecting batch, dwindles the into accurate virtual metrology method of cabinet weight error, is used for cigarette cigarette industry and other material weighing field.
For realizing the object of the invention, technical scheme is following:
The virtual metrology method that this material accurately advances cabinet realizes through following mode: send speed to fix to the transporting velocity and the shake of the conveying equipment between the storage cabinet scale before the cabinet, measure each cabinet and advance the required time of delivery of cabinet, ask mean value T separately; Scale signals collecting density is set at 1 second, follows the trail of in the required time of delivery mean value T of each cabinet charging, and the integrated flux of scale before each cabinet, the record cumulative data is set up the corresponding stacked data piece of each cabinet; Establishment PLC storehouse program is calculated each cabinet inlet amount by the program trace of PLC storehouse, and between single batch or many batches, is switched.The scale signal is a floating type.
The invention has the advantages that: before cabinet, do not increase under the situation of any WT-MSR; Utilize before the cabinet the fixing PLC storehouse tracer technique with the preceding scale semi-invariant of cabinet of material transfer equipment time of delivery between the scale and storage cabinet; Guarantee that the PLC electric-control system is under the prerequisite of less resource overhead; Solve when switching between large quantities of connected batch, advance cabinet weight than the mistake problem, to advance cabinet amount measuring accuracy consistent with the preceding scale measuring accuracy of cabinet for the storage cabinet between can making batch.Be statistics, the tracking of storage cabinet material, follow-up material accurate scheduling provide safeguard.As far as cigarette industry, accurate pipe tobacco material weighing helps improving cigarette quality, practices thrift cost, enhances productivity.
Description of drawings
Fig. 1 cigarette materials into cabinet process flow diagram of weighing;
Fig. 2 PLC control of the present invention material flow figure.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail.
Can be known that by accompanying drawing 1 scale differs apart from distance from cupboard before the cabinet, the weight of material between resting on when changing cabinet on the conveying equipment does not wait, and causes that into the cabinet margin of error is also different.In cigarette factory throwing link, scale is generally belt conveyer and bobbing machine to the conveying equipment between the storage cabinet before the cabinet, send speed to fix its transporting velocity and shake.Before cabinet, place the test material behind the scale, measure each cabinet and advance the required time of delivery of cabinet.T averages after adopting mean value method repeatedly to measure.This time T is set in down-stream.
Consistent with the scale precision for guaranteeing the material metering on the belt, actual scale signals collecting density is set at 1 second.If the omnidistance data of scale integrated flux before the real time record cabinet, resource can consume too big, less feasible in PLC.The present invention, follows the trail of in each cabinet advances the required time of delivery T of cabinet with the mode of first in first out according to stacking method, and the integrated flux of scale before each cabinet is with less data space and the required cumulative data of resource overhead record.With controller Siemens 300 or 400 commonly used of tobacco system is example, and the signal taking turn cycle generally in the 100-500 millisecond, need not be used high speed counting module, in cycle period, just can satisfy one second collection density, can not increase the scanning burden.According to the PLC model, each PLC can open more than minimum 1,000 DB pieces in addition, and a DB piece capacity does not generally wait to 32K at 16K; The scale signal is a floating type; Take 4 each byte, follow the trail of by 10 minutes fed distance of maximum duration, storehouse length design maximum is 4*60*10=2400 (B); Less than the 3KB size, 8 DB pieces just can be accomplished the storehouse tracking of 40 cabinets.Also can each cupboard all to the stacked data piece of oneself should be arranged.
Storehouse program (seeing accompanying drawing 2) among the establishment PLC; With one second time clock and computing " line production zone bit "; Corresponding cabinet storehouse read-write subroutine is called in triggering, and composes " the stack top data variable " of giving the overall situation visible to stack top data (being the preceding scale present flow rate of cabinet).Compose the stack truth of a matter to give according to (be current actual advance cabinet semi-invariant) and have the overall situation visible " the stack truth of a matter is according to variable ".
One 4 byte long, floating point type, " Over-The-Counter pipe tobacco inlet amount variable " that the overall situation is visible is set in PLC.Do not allow the situation of zero clearing when preventing to forget before batch startup that zero clearing or large quantities of is changed batch, the interference that program is calculated when single batch or large quantities of batches of punishments in advance begin, is composed the current semi-invariant of scale before the cabinet to " Over-The-Counter pipe tobacco inlet amount variable ".In PLC, be provided with one 4 byte long, floating point type, the overall situation is visible " current actual advance cabinet quantitative change amount ", its assignment is divided into three kinds of situation:
During large quantities of end, carry out " current actual advance cabinet quantitative change amount "=" stack top data variable " (current amount of scale before the cabinet)-" Over-The-Counter pipe tobacco inlet amount variable ".
During large quantities of change batch, carry out " current actual advance cabinet quantitative change amount "=" the stack truth of a matter is according to variable " (current actual advance cabinet semi-invariant)-" Over-The-Counter pipe tobacco inlet amount variable " " Over-The-Counter pipe tobacco charging variable "=" when the cabinet quantitative change amount of advancing ";
Single batch when finishing, carry out " current actual advance cabinet quantitative change amount "=" stack top data variable " (current amount of scale before the cabinet)-" Over-The-Counter pipe tobacco inlet amount variable ".
By each cabinet inlet amount of PLC storehouse program trace record, and between single batch or many batches, switch.The pipe tobacco material of accurate weighing is sent into next link.
Claims (2)
1. material accurately advances the virtual metrology method of cabinet, it is characterized in that, realizes through following mode: send speed to fix to the transporting velocity and the shake of the conveying equipment between the storage cabinet scale before the cabinet, measure each cabinet and advance the required time of delivery of cabinet, ask mean value T separately; Scale signals collecting density is set at 1 second, follows the trail of in the required time of delivery mean value T of each cabinet charging, and the integrated flux of scale before each cabinet, the record cumulative data is set up the corresponding stacked data piece of each cabinet; Establishment PLC storehouse program is calculated each cabinet inlet amount by the program trace of PLC storehouse, and between single batch or many batches, is switched.
2. material as claimed in claim 1 accurately advances the virtual metrology method of cabinet, it is characterized in that, the scale signal is a floating type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102924886A CN102445261A (en) | 2011-09-29 | 2011-09-29 | Virtual metering method for accurate material cabinet feeding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102924886A CN102445261A (en) | 2011-09-29 | 2011-09-29 | Virtual metering method for accurate material cabinet feeding |
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| Publication Number | Publication Date |
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| CN102445261A true CN102445261A (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102924886A Pending CN102445261A (en) | 2011-09-29 | 2011-09-29 | Virtual metering method for accurate material cabinet feeding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136265A (en) * | 2015-08-21 | 2015-12-09 | 济南新瑞安迪自动化有限公司 | Precision metering method for weighing and burdening |
| CN105905511A (en) * | 2016-05-20 | 2016-08-31 | 河南中烟工业有限责任公司 | Storage cabinet stock material real-time metering method and device for tobacco production |
| CN113928869A (en) * | 2021-11-09 | 2022-01-14 | 山东中烟工业有限责任公司 | Method and system for controlling feeding of expanded cut tobacco produced by tobacco shred manufacturing |
-
2011
- 2011-09-29 CN CN2011102924886A patent/CN102445261A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136265A (en) * | 2015-08-21 | 2015-12-09 | 济南新瑞安迪自动化有限公司 | Precision metering method for weighing and burdening |
| CN105905511A (en) * | 2016-05-20 | 2016-08-31 | 河南中烟工业有限责任公司 | Storage cabinet stock material real-time metering method and device for tobacco production |
| CN105905511B (en) * | 2016-05-20 | 2018-03-27 | 河南中烟工业有限责任公司 | A kind of method and apparatus of tobacco leaf production container storage material real time measure |
| CN113928869A (en) * | 2021-11-09 | 2022-01-14 | 山东中烟工业有限责任公司 | Method and system for controlling feeding of expanded cut tobacco produced by tobacco shred manufacturing |
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Application publication date: 20120509 |