CN104760714B - A kind of stock product packed weight control method - Google Patents
A kind of stock product packed weight control method Download PDFInfo
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- CN104760714B CN104760714B CN201510044632.2A CN201510044632A CN104760714B CN 104760714 B CN104760714 B CN 104760714B CN 201510044632 A CN201510044632 A CN 201510044632A CN 104760714 B CN104760714 B CN 104760714B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
- B65B1/32—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by weighing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
- B65B1/46—Check-weighing of filled containers or receptacles
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Abstract
The invention discloses a kind of stock product packed weight control method, belong to commodity quantitative package technical field, the step such as including sampling observation, calculating, S map analysis, X map analysis；A kind of stock product packed weight control system, including finished conveying device to be installed, quantitative packaging device, check weighing device, finished product output device and sampling weighing device, described finished conveying device to be installed, quantitative packaging device, check weighing device, finished product output device is sequentially connected with, sampling weighing device be connected with checking weighing device.The technical program is by the most online sampling observation, realize closed loop control, quickly search reason and correct, control efficiency is high, also improve the concordance of quantification packing commodity weight, the quantitative package product making net content be 50kg, error control is within 0.1kg, while guarantee reaches the control requirement of " quantification packing commodity metrological supervision and administration way ", also greatly reduce and packaging process weighs the loss that positive error brings.
Description
Technical field
The invention belongs to commodity quantitative package technical field, relate to a kind of stock product packed weight control method and control thereof
System processed.
Background technology
In the quantitative package control technology of current production enterprise, the control to net content error is to pack mostly
After inspect by random samples, to detect the net content error after same batch products packaging, if error is relatively big, then to next batch product
Packaging facilities is adjusted and corrects.But the error occurred in packaging process is difficulty with effectively controlling by this, once occurs
The situation that the fluctuation of a collection of product intermediate package weight error is bigger, can not do over again again in batch, and this is by the later stage of this batch of product
Sale brings certain difficulty.For the powder product in chemical industry, particularly phosphate fertilizer product, the control difficulty of net content is very
Greatly, need to take systematic control management method, to ensure that the net content of packaging product meets " quantification packing commodity metering prison
Superintend and direct management method " the control requirement of (State Administration for Quality Supervision and Inspection and Quarantine makes No. 75), by reducing in packaging process
Negative error protects consumer rights, and enterprise's needs give more greatly enterprise by minimizing product in packaging process because of positive error simultaneously
Bring unnecessary loss, reduce the production cost of enterprise.
In existing flow package, often by strengthening enterprises fine-grained management and examination, increase operator mark
Standardization training, increase are packed the administration means such as the sampling observation frequency of product and are managed controlling, and this mode is to people in packaging process
Control for factor has actually reached preferable effect, but along with constantly reinforcement and the automaticity of enterprise's fine-grained management
Improve constantly, require also improving constantly to the control of content of prepackaged goods with fixed net, and anthropic factor be the most
Very little, need to reach more to be accurately controlled, it is necessary to propose more preferable control method at technological layer.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of stock product packed weight control method and control system
System, thus reach accurately to control, reduce the effect of quantitative package error.
The present invention is achieved by following technical solution.
A kind of stock product packed weight control method, comprises the steps:
1) sampling observation: periodically be sampled checking to the finished product completing packaging, from the quantitative packaging device continuously run with
Machine extracts with a batch of some set products, weighs its net weight, records data, calculates meansigma methods and standard deviation；
2) calculate: calculate overall average X of the whole weighing values recordedAlwaysWith average standard deviation SFlat；
3) S map analysis: calculate standard deviation and control the control limit of figure, draw standard deviation and control figure, will appear from following two
One of the situation of kind:
If a. standard deviation control figure is shown as unstable state, specification error is relatively big, need to be to quantitative packaging device with check title
Refitting is put and is carried out checking, correcting, and then repeats above-mentioned sampling observation, calculation procedure, re-starts S map analysis；
If b. standard deviation control figure is shown as stable state, then explanation quantitative package weight error is in allowed band, can continue
Continuous next step；
4) X map analysis: calculate overall average and control the control limit of figure, draw overall average and control figure, will appear from following two
One of the situation of kind:
If a. overall average control figure is shown as unstable state, specification error is relatively big, need to be to quantitative packaging device with check title
Refitting is put and is carried out checking, correcting, and then repeats above-mentioned sampling observation, calculating, S map analysis step, re-starts X map analysis；
If b. overall average control figure is shown as stable state, then explanation quantitative package weight error is in allowed band, sampling observation
Qualified.
Further, in described sampling observation step, the precision of the sampling meausring apparatus used is higher than checking weighing device
Precision, sampling weighing technique is repeatedly weighing method.
Further, in described sampling observation step, the interval time of every two set product extractions is no less than 10min, the product of extraction
Product quantity is no less than 25 groups.
Further, in described S map analysis and X map analysis step, control figure is divided into 6 regions, respectively A, B, C,
C, B, A, two of which A district, B district, C district are respectively in the both sides of centrage, symmetrical about centrage.
A kind of stock product packed weight control system, including finished conveying device to be installed, quantitative packaging device, checks title
Refitting is put, finished product output device and sampling weighing device, described finished conveying device to be installed, quantitative packaging device, checks and weighs
Device, finished product output device are sequentially connected with, and described sampling weighing device is connected with checking weighing device.
The described weighing precision weighing precision higher than quantitative packaging device checking weighing device.
The invention has the beneficial effects as follows:
A kind of stock product packed weight control method of the present invention and control system thereof, by periodically taking out online
Inspection, it is achieved closed loop control, quickly searches reason and corrects, and control efficiency is high, also improves the consistent of quantification packing commodity weight
Property, the quantitative package product making net content be 50kg, error control, within 0.1kg, reaches " quantification packing commodity meter in guarantee
Amount administration Regulations for Supervision " (State Administration for Quality Supervision and Inspection and Quarantine makes No. 75) control require while, also greatly reduce
Packaging process weighs the loss that positive error brings.
Accompanying drawing explanation
Fig. 1 is the annexation schematic diagram of weight control system in the present invention；
Fig. 2 is one 25 subgroup packaging weighing value standard deviation control figures of embodiment in the present invention；
Fig. 3 is one 25 subgroup packaging weighing value overall average control figures of embodiment in the present invention；
Fig. 4 is 2 25 subgroup packaging weighing value standard deviation control figures of embodiment in the present invention；
Fig. 5 is 3 25 subgroup packaging weighing value standard deviation control figures of embodiment in the present invention；
Fig. 6 is 3 25 subgroup packaging weighing value overall average control figures of embodiment in the present invention.
Detailed description of the invention
Further describe technical scheme below in conjunction with the accompanying drawings, but claimed scope is not limited to institute
State.
A kind of stock product packed weight control method of the present invention, comprises the steps:
1) sampling observation: periodically be sampled checking to the finished product completing packaging, from the quantitative packaging device continuously run with
Machine extracts with a batch of some set products, weighs its net weight, records data, calculates meansigma methods and standard deviation；
2) calculate: calculate overall average X of the whole weighing values recordedAlwaysWith average standard deviation SFlat；
3) S map analysis: S figure is standard deviation control figure, calculates standard deviation and controls the control limit of figure, draw standard deviation
Difference controls figure, will appear from following two kinds of situations:
If a. standard deviation control figure is shown as unstable state, specification error is relatively big, need to be to quantitative packaging device with check title
Refitting is put and is carried out checking, correcting, and then repeats above-mentioned sampling observation, calculation procedure, re-starts S map analysis；
If b. standard deviation control figure is shown as stable state, then explanation quantitative package weight error is in allowed band, can continue
Continuous next step；
4) X map analysis: X figure is overall average control figure, calculates overall average and controls the control limit of figure, draw grand mean
Value controls figure, will appear from following two kinds of situations:
If a. overall average control figure is shown as unstable state, specification error is relatively big, need to be to quantitative packaging device with check title
Refitting is put and is carried out checking, correcting, and then repeats above-mentioned sampling observation, calculating, S map analysis step, re-starts X map analysis；
If b. overall average control figure is shown as stable state, then explanation quantitative package weight error is in allowed band, sampling observation
Qualified.
In described sampling observation step, the precision of the sampling meausring apparatus used is higher than the precision checking weighing device, sampling
Weighing technique is repeatedly weighing method.
In described sampling observation step, the interval time of every two set product extractions, the product quantity of extraction was many no less than 10min
In 25 groups.
In described S map analysis and X map analysis step, control figure is divided into 6 regions, respectively A, B, C, C, B, A, wherein
Liang Ge A district, B district, C district are respectively in the both sides of centrage, symmetrical about centrage.
A kind of stock product packed weight control system, including finished conveying device to be installed, quantitative packaging device, checks title
Refitting is put, finished product output device and sampling weighing device, described finished conveying device to be installed, quantitative packaging device, checks and weighs
Device, finished product output device are sequentially connected with, and described sampling weighing device is connected with checking weighing device；Finished product to be installed conveying dress
Putting and be conveyer belt with finished product output device, by driven by motor, quantitative packaging device is electronic quantitative packer, checks dress of weighing
Being set to an electronic scale, sampling weighing device is laboratory standard balance, uses the mark packing the weights such as theoretical net weight with product standard
Quasi-counterweight, checks the weighing precision weighing precision higher than quantitative packaging device of weighing device.
Embodiment one
As it is shown in figure 1, a kind of stock product packed weight control system, including finished conveying device to be installed, quantitative package
Device, check weighing device, finished product output device and sampling weighing device, described finished conveying device to be installed, quantitative package dress
Put, check weighing device, finished product output device is sequentially connected with, and described sampling weighing device is connected with checking weighing device；Described
Check the weighing precision weighing precision higher than quantitative packaging device of weighing device；The weighing precision of described sampling weighing device is high
In the weighing precision checking weighing device.When extracted sample is weighed the most qualified by sampling weighing device, then will be extracted
Sample is directly exported by finished product output device；When extracted sample by sampling weighing device weigh analysis defective, then need
Shut down and carry out checking correction, starting device with checking weighing device to quantitative packaging device, again inspect by random samples.Controlling party in detail
Method is as follows.
A kind of stock product packed weight control method, comprises the steps:
1) sampling observation: periodically being sampled checking to the finished product completing packaging, concrete operations mode is from determining of continuously running
Randomly draw with a batch of some set products on amount packing device, extract one group at interval of 10min～15min, extract 25 altogether
Group, uses repeatedly weighing method, weighs its net weight one by one and record data, wherein retains 2 significant digits during measured value record,
Meansigma methods retains after arithmetic point three, and standard deviation retains after arithmetic point five, and number of times of weighing is 5 times, calculates meansigma methods and mark
Quasi-deviation, acquired results is as shown in table 1；
Table 1 preliminary date log
2) calculate: calculate overall average X of the whole measured values recordedAlwaysWith average standard deviation SFlat, retain arithmetic point
Latter five；
XAlways=(X1+X2+X3+……+X25)/25=50.00784kg
SFlat=(S1+S2+S3+……+S25)/25=0.00856kg
3) S map analysis: the control calculating standard deviation control figure limits:
When subgroup size n=5, look into " measure control figure coefficient table " and obtain B4=2.089, B3=0, substitute into S figure formula:
CLS=SFlat=0.00856kg
UCLS=B4SFlat=2.089 × 0.00856=0.01788kg
LCLS=B3SFlat=0.000 × 0.00856=0.00000kg
Draw standard deviation according to result of calculation and control figure, control figure is divided into 6 regions, respectively A, B, C, C, B, A,
Two of which A district, B district, C district are respectively in the both sides of centrage, symmetrical about centrage, as in figure 2 it is shown, synopsis 4 is to line chart
State judges, state described in table 4 does not occurs in standard deviation control figure, illustrates that quantitative package standard weight deviations is allowing
In the range of, next step can be continued.
4) X map analysis: the control calculating overall average control figure limits:
When subgroup size n=5, look into " measure control figure coefficient table " and obtain A3=1.427, substitute into X figure formula:
CLX=XAlways=50.0078kg
UCLX=XAlways+A3SFlat=50.0078+1.427 × 0.00856=50.0200kg
LCLX=XAlways-A3SFlat=50.0078-1.427 × 0.00856=49.9956kg
Draw overall average according to result of calculation and control figure, figure will be controlled and be divided into 6 regions, respectively A, B, C, C, B,
A, two of which A district, B district, C district are respectively in the both sides of centrage, symmetrical about centrage, as it is shown on figure 3, synopsis 4 is to line
Figure state judges, listed state in table 4 does not occurs in overall average control figure, then explanation quantitative package weight overall average exists
In allowed band, the analysis process that weighs of packing scale is in state in cont rol, and it is qualified to inspect by random samples.
5) X under statistic behavior is extendedAlwaysAnd SFlatControl the control limit of figure, enter and control with controlling the figure stage, it is achieved to mistake
The daily control of process control.
Embodiment two
A kind of stock product packed weight control method, comprises the steps:
1) sampling observation: periodically being sampled checking to the finished product completing packaging, concrete operations mode is from determining of continuously running
Randomly draw with a batch of some set products on amount packing device, extract one group at interval of 10min～15min, extract 25 altogether
Group, uses repeatedly weighing method, weighs its net weight one by one and record data, wherein retains 2 significant digits during measured value record,
Meansigma methods retains after arithmetic point three, and standard deviation retains after arithmetic point five, and number of times of weighing is 5 times, calculates meansigma methods and mark
Quasi-deviation, acquired results is as shown in table 2；
Table 2 preliminary date log
2) calculate: calculate overall average X of the whole measured values recordedAlwaysWith average standard deviation SFlat, retain arithmetic point
Latter five；
XAlways=(X1+X2+X3+……+X25)/25=49.99536kg
SFlat=(S1+S2+S3+……+S25)/25=0.00950kg
5) S map analysis: the control calculating standard deviation control figure limits:
When subgroup size n=5, look into " measure control figure coefficient table " and obtain B4=2.089, B3=0, substitute into S figure formula,
:
CLS=SFlat=0.00950kg
UCLS=B4SFlat=2.089 × 0.00950=0.01985kg
LCLS=B3SFlat=0.000 × 0.00950=0.00000kg
Draw standard deviation according to result of calculation and control figure, control figure is divided into 6 regions, respectively A, B, C, C, B, A,
Two of which A district, B district, C district are respectively in the both sides of centrage, and symmetrical about centrage, as shown in Figure 4, synopsis 4 is to line chart
State judges, occurs in that the situation described in sequence number 6 in table 4, standard deviation control figure are shown as unstable state, and description standard is inclined
Difference is not in span of control, and packaging process occurs abnormal, need to shut down to quantitative packaging device and check weighing device check,
Correction, then repeats above-mentioned sampling observation, calculation procedure, re-starts S map analysis, until standard deviation control figure is shown as stable state
After, continue next step.
Embodiment three
A kind of stock product packed weight control method, comprises the steps:
1) sampling observation: periodically being sampled checking to the finished product completing packaging, concrete operations mode is from determining of continuously running
Randomly draw with a batch of some set products on amount packing device, extract one group at interval of 10min～15min, extract 25 altogether
Group, uses repeatedly weighing method, weighs its net weight one by one and record data, wherein retains 2 significant digits during measured value record,
Meansigma methods retains after arithmetic point three, and standard deviation retains after arithmetic point five, and number of times of weighing is 5 times, calculates meansigma methods and mark
Quasi-deviation, acquired results is as shown in table 3；
Table 3 preliminary date log
2) calculate: calculate overall average X of the whole measured values recordedAlwaysWith average standard deviation SFlat, retain arithmetic point
Latter five；
XAlways=(X1+X2+X3+……+X25)/25=50.00197kg
SFlat=(S1+S2+S3+……+S25)/25=0.01022kg
3) S map analysis: the control calculating standard deviation control figure limits:
When subgroup size n=5, look into " measure control figure coefficient table " and obtain B4=2.089, B3=0, substitute into S figure formula:
CLS=SFlat=0.01022kg
UCLS=B4SFlat=2.089 × 0.01022=0.02135kg
LCLS=B3SFlat=0.000 × 0.01022=0.00000kg
Draw standard deviation according to result of calculation and control figure, control figure is divided into 6 regions, respectively A, B, C, C, B, A,
Two of which A district, B district, C district are respectively in the both sides of centrage, symmetrical about centrage, as it is shown in figure 5, synopsis 4 is to line chart
State judges, does not occurs that the state described in table 4, standard deviation control figure are shown as stable state, quantitative package weight is described
Standard deviation, in controlled area charactert, can continue next step.
4) X map analysis: the control calculating overall average control figure limits:
When subgroup size n=5, look into " measure control figure coefficient table " and obtain A3=1.427, substitute into X figure formula:
CLX=XAlways=50.00197kg
UCLX=XAlways+A3SFlat=50.00197+1.427 × 0.01022=50.01655kg
LCLX=XAlways-A3SFlat=50.00197-1.427 × 0.01022=49.98739kg
Draw overall average according to result of calculation and control figure, control figure is divided into 6 regions, respectively A, B, C, C, B, A,
Two of which A district, B district, C district are respectively in the both sides of centrage, and symmetrical about centrage, as shown in Figure 6, synopsis 4 is to line chart
State judges, occurs in that the situation described in sequence number 1 in table 4, have 2 out-of-bounds, overall average control figure be shown as non-surely
State, overall average exceeds controlled area charactert, illustrate to pack weighting error relatively big, need to quantitative packaging device with check weighing device and enter
Row checks, correction, then repeats above-mentioned sampling observation, calculating, S map analysis step, re-starts X map analysis, until overall average control
Drawing no longer occurs that the situation described in table 4, overall average control figure are shown as stable state, at the analysis process that weighs of packing scale
In state in cont rol, it is qualified to inspect by random samples.
5) X under statistic behavior is extendedAlwaysAnd SFlatControl the control limit of figure, enter and control with controlling the figure stage, it is achieved to mistake
The daily control of process control.
The eight kinds of patterns that can ascertain the reason in table 4 control figure
Claims (4)
1. a stock product packed weight control method, it is characterised in that comprise the steps:
1) sampling observation: periodically be sampled checking to the finished product completing packaging, take out at random from the quantitative packaging device continuously run
Take with a batch of some set products, weigh its net weight, record data, calculate meansigma methods and standard deviation；
2) calculate: calculate overall average X of the whole weighing values recordedAlwaysWith average standard deviation SFlat；
3) S map analysis: calculate standard deviation and control the control limit of figure, draw standard deviation and control figure, will appear from following two kinds of feelings
One of condition:
If a. standard deviation control figure is shown as unstable state, specification error is relatively big, need to be to quantitative packaging device with check dress of weighing
Put and carry out checking, correcting, then repeat above-mentioned sampling observation, calculation procedure, re-start S map analysis；
If b. standard deviation control figure is shown as stable state, then explanation quantitative package weight error is in allowed band, under can continuing
One step；
4) X map analysis: calculate overall average and control the control limit of figure, draw overall average and control figure, will appear from following two kinds of feelings
One of condition:
If a. overall average control figure is shown as unstable state, specification error is relatively big, need to be to quantitative packaging device with check dress of weighing
Put and carry out checking, correcting, then repeat above-mentioned sampling observation, calculating, S map analysis step, re-start X map analysis；
If b. overall average control figure is shown as stable state, then explanation quantitative package weight error is in allowed band, and it is qualified to inspect by random samples.
A kind of stock product packed weight control method the most according to claim 1, it is characterised in that: described sampling observation step
In, the precision of the sampling meausring apparatus used is higher than the precision checking weighing device, and sampling weighing technique is repeatedly weighing method.
A kind of stock product packed weight control method the most according to claim 1, it is characterised in that: described sampling observation step
In, the interval time of every two set product extractions is no less than 25 groups no less than 10min, the product quantity of extraction.
A kind of stock product packed weight control method the most according to claim 1, it is characterised in that: described S map analysis
With in X map analysis step, control figure being divided into 6 regions, respectively A, B, C, C, B, A, two of which A district, B district, C district are respectively
In the both sides of centrage, symmetrical about centrage.
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| CN105539932B (en) * | 2015-12-30 | 2019-08-02 | 长春北方化工灌装设备股份有限公司 | A kind of method of adaptive correction weighing system error |
| CN106429362B (en) * | 2016-11-28 | 2019-04-16 | 昆山沙恩斯自动化科技有限公司 | Prepared slices of Chinese crude drugs intelligence prescription system |
| CN108016643A (en) * | 2017-11-26 | 2018-05-11 | 王莉娜 | One kind even rolls up plastic-box packaging machine |
| CN110510172A (en) * | 2019-09-13 | 2019-11-29 | 广州峰彩信息科技有限公司 | Fruits and vegetables Electronic weigher for quantified packing |
| CN112814011B (en) * | 2021-01-07 | 2021-11-23 | 西南交通大学 | Ultra-large open caisson foundation construction monitoring system and construction regulation and control method based on monitoring system |
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| CN201665317U (en) * | 2009-10-16 | 2010-12-08 | 安徽友特自动化设备有限公司 | Automatic quantitative packing machine |
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| JP2009274799A (en) * | 2008-05-14 | 2009-11-26 | Sumitomo Metal Mining Co Ltd | Powder quantitative delivery device control method |
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|---|---|---|---|---|
| CN201665317U (en) * | 2009-10-16 | 2010-12-08 | 安徽友特自动化设备有限公司 | Automatic quantitative packing machine |
| CN101922961A (en) * | 2010-09-30 | 2010-12-22 | 上海大和衡器有限公司 | Seed weighting system having functions of on-line counting and weight compensating and weighting method |
| CN102658876A (en) * | 2012-05-23 | 2012-09-12 | 枣庄市三维技术有限公司 | Packing scale with repeated weighing device |
| CN102700739A (en) * | 2012-06-20 | 2012-10-03 | 上海大和衡器有限公司 | Quantitative packaging scale for sub-package according to amount of grains and quantitative weighing method of quantitative packaging scale |
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