CN102840904B - The method for supervising of weigher accuracy in a kind of production run - Google Patents
The method for supervising of weigher accuracy in a kind of production run Download PDFInfo
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- CN102840904B CN102840904B CN201210288374.9A CN201210288374A CN102840904B CN 102840904 B CN102840904 B CN 102840904B CN 201210288374 A CN201210288374 A CN 201210288374A CN 102840904 B CN102840904 B CN 102840904B
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Abstract
The method for supervising of weigher accuracy in production run of the present invention, logic coefficient is obtained before the start of production by the weighing value of supplied materials and the ratio of actual mass, after production completes, by the theory weighing value of this weigher of logic coefficient calculations birth supplied materials in postpartum, then the weigher displayed value obtaining supplied materials is weighed by weigher, using the difference of described theoretical weighing value and described weigher displayed value as basis for estimation, then report to the police as exceeded standard and overhaul.Pass through the program, solving in actual production process cannot the problem of real-time follow-up weigher accuracy, by judging the order of accuarcy of weigher in production run and evaluate, according to the sign that feedack (whether abnormal) Timeliness coverage systematicness factor occurs, and take measures to eliminate its impact, weigher is maintained in process of production only by the slave mode that random factor affects, reaches the object of Mass Control in production run.
Description
Technical field
The present invention relates to a kind of method for supervising of weigher, specifically a kind of method for supervising being used in the weigher accuracy of production field.
Background technology
Weigher widely uses at production field, is used for weighing the quality of material, and its accuracy weighed affects the product quality of production.During as production of cigarettes, in each process section of Primary processing shop, weigher is crucial metering outfit, and its precision, stability ensure from being dosed into the mixed prerequisite that whether silk perfuming process works well, whether technic index is up to standard.The semi-invariant that weigher weighs can reflect the total kilogram of number that each technological process is produced, and also can reflect the situation such as silk production rate, Filling power, whole cut rate, water percentage, the change of loss value machine degree of purity semi-invariant.Can find out, the measuring accuracy of weigher affects whole production of cigarettes process.At present, the calibration cycle of national standard weigher is six months, in these six months, user is difficult to follow the tracks of weighing balance accuracy, when the measuring accuracy of weigher changes, be difficult to Timeliness coverage, thus cause pipe tobacco silk production rate, sky is supplemented with money, the accuracy of whole cut rate, water percentage, loss value and degree of purity data is difficult to control.
Also verifying attachment and the method for some weigher accuracy has been opened altogether in prior art, a kind ofly scale device is tested in real time for weigher as disclosed in Chinese patent literature CN201653535U, comprise a scale body, this scale body is connected with a control cylinder unit, the cylinder fork of this control cylinder unit is connected with a suspension bracket, this suspension bracket is connected with a counterweight, this control cylinder unit stretches out or retracts and is positioned at primary importance or the second place to control this counterweight, in this primary importance, this counterweight departs from this suspension bracket, and in this second place, this counterweight is suspended on this suspension bracket.When scale do not tested by this verifying attachment, counterweight departs from suspension bracket, the weight of counterweight is not added on scale, when testing scale, control module is retracted, control cylinder unit and suspension bracket leave counterweight under order ground, hang in the sky, and this counterweight is as the part increased, its weight counts scale body weight, as long as whether observe the weight increased is that the weight of counterweight just can show that whether title is accurate.The verifying attachment of the weigher accuracy provided in this technical scheme, although easy to use, needs special verifying attachment to check, be not suitable in production line, and special verifying attachment is set, not only labor intensive, material resources, too increase working time, improve production cost.In addition, in process of production, weigher may be improper use or the change of other factor generation precision due to people, and the staff now on production line is difficult to learn in time, have impact on normally carrying out of production.
Summary of the invention
For this reason, technical matters to be solved by this invention is weigher verifying attachment of the prior art, needing, special device is set, adds production cost, be not suitable for and the real-time technical matters monitored in production run, thus a kind of method just can checking weigher accuracy without the need to arranging special device is provided.
For solving the problems of the technologies described above, the invention provides the method for supervising of weigher accuracy in a kind of production run, comprising the steps:
(1) before this batch of production starts, use weigher to weigh supplied materials weight, obtain the weighing value of supplied materials before producing;
(2) calculating produces the weighing value of front supplied materials and the ratio of the actual weight of the front supplied materials of production, as logic coefficient;
(3) after this batch of production completes, calculate the actual weight of supplied materials and the product of described logic coefficient after producing, obtain the theory weighing value of producing rear supplied materials;
(4) use described weigher to weigh the described supplied materials after producing, obtain the weigher displayed value of supplied materials after described production;
(5) calculate the difference of the weigher displayed value of supplied materials after the theory weighing value of supplied materials after described production and described production, if described difference exceeds test stone, then carry out abnormal alarm, carry out inspection and the calibration of weigher.
The method for supervising of weigher accuracy in production run of the present invention, in described step (1), described weigher, through calibration, meets measurement standard.
The method for supervising of weigher accuracy in production run of the present invention, in described step (2), the actual weight of described supplied materials is obtained by the weighing of other scales.
The method for supervising of weigher accuracy in production run of the present invention, in described step (5), described test stone is formulated according to GB SPC.
The method for supervising of weigher accuracy in production run of the present invention, in described step (5), described standard is 3 times of historical data standard deviations, exceeds for exception.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) method for supervising of weigher accuracy in production run of the present invention, logic coefficient is obtained before the start of production by the ratio of the weighing value of supplied materials before production and the actual mass of the front supplied materials of production, after production completes, by logic coefficient and after producing the actual mass of supplied materials calculate the theory weighing value of weigher after this production, then the weigher displayed value obtaining and produce rear supplied materials is weighed by weigher, using the difference of described theoretical weighing value and described weigher displayed value as judging data, then reporting to the police as exceeded standard and overhauling.Pass through the program, solving in production run cannot the problem of real-time follow-up weigher accuracy, by judging the order of accuarcy of weigher in production run and evaluate, according to the sign that feedack (whether abnormal) Timeliness coverage systematicness factor occurs, and take measures to eliminate its impact, weigher is maintained in process of production only by the slave mode that random factor affects, reaches the object of Mass Control in production run.The method for supervising of weigher accuracy in production run of the present invention, define weigher is monitored in real time, at any time grasp nuclear scale precision change, ensure that weigher precision meets technological requirement, find and keep in repair to change prevention repair and maintenance into by during calibration in 6 months, realizing being changed to process control by output control, being changed to automatically controlling science decision by manual control empirical decision making.In production run of the present invention, the method for supervising of weigher accuracy solves weighing balance inspection in prior art needs special arrangement, be not suitable for the technical matters of monitoring measuring accuracy in real time in production run, be particularly useful for the monitoring of weigher accuracy in production run.
(2) method for supervising of weigher accuracy in production run of the present invention, in described step (1), described weigher is through calibration, meet measurement standard, the weigher after calibration is used to produce, better can judge whether it there occurs precision change in process of production, in whole production run, keep higher accuracy of measurement, ensure normal operation and the product quality of production.
(3) method for supervising of weigher accuracy in production run of the present invention, in described step (2), the actual weight of described supplied materials is obtained by the mark of supplied materials, and the actual weight of described supplied materials is easy to obtain, and uses the method to calculate simple.
(4) method for supervising of weigher accuracy in production run of the present invention, in described step (5), described test stone is formulated according to GB SPC, described standard is 3 times of historical data standard deviations, exceed for exception, meet national standard and industrial needs, be convenient to Timeliness coverage problem and find problem.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the process flow diagram of the method for supervising of weigher accuracy in production run of the present invention.
Embodiment
Provide the embodiment that of the method for supervising of weigher accuracy in production run of the present invention is concrete below, comprise the steps:
(1) before this batch of production starts, use weigher to be tested to weigh and produce front supplied materials weight, obtain the weighing value A of supplied materials before producing
1; The weigher after calibrating can be selected herein to weigh, and the weigher after calibration has good measuring accuracy, improves the weighing precision in production run.Certainly, if there is error slightly in weigher herein, do not affect yet the method in whole process to the monitoring of this weigher accuracy.
(2) the weighing value A producing front supplied materials is calculated
1with the actual weight A producing front supplied materials
0ratio, as logic coefficient B, B=A
1/ A
0.The actual weight A of supplied materials before producing
0for the weight adopting other each operation scales to weigh, can be obtained by methods such as weighings.
(3) after this batch of production completes, the actual weight A ' of supplied materials after producing is obtained
0, the actual weight A ' of supplied materials after production herein
0also be adopt the weight that weighs of other each operation scales, other operations herein selected claim should with select in step (2) identical.The actual weight A ' of rear supplied materials will be produced
0be multiplied with described logic coefficient B, obtain the theory weighing value A ' producing rear supplied materials
1, i.e. A '
1=A '
0× B.
(4) use described weigher to be tested to weigh described supplied materials, obtain the weigher displayed value A of supplied materials after described production
2;
(5) described theoretical weighing value A ' and described weigher displayed value A is calculated
2difference C, C=︳ A '
1-A
2︳, if described difference exceeds test stone, then carries out abnormal alarm, carries out inspection and the calibration of weigher.Described test stone is according to GB SPC(statistical Process Control) to formulate, described standard is 3 times of historical data standard deviations, exceeds for exception.
The method for supervising of weigher accuracy in production run of the present invention, accuracy monitoring can be carried out to the multiple weighers in production run simultaneously, be a kind of have automatic collection, automatic analysis, the accuracy of monitoring scale, metrological personnel according to monitoring alarm carry out the inspection of weigher and the method for calibration operation.The sign that staff occurs according to feedback information Timeliness coverage systematicness factor, and take measures to eliminate its impact, weigher is maintained in process of production only by the slave mode that random factor affects, reaches the object of Mass Control.Be applicable to the inspection of weigher accuracy in production run, be particularly useful for the real-time monitoring to the accuracy of weigher in cigarette industry Primary processing shop production run.
Obviously, above-described embodiment is only for clearly example being described, and is not limitation of the invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (5)
1. a method for supervising for weigher accuracy in production run, is characterized in that, comprises the steps:
(1) before this batch of production starts, use weigher to weigh supplied materials weight, obtain the weighing value of supplied materials before producing;
(2) calculating produces the weighing value of front supplied materials and the ratio of the actual weight of the front supplied materials of production, as logic coefficient;
(3) after this batch of production completes, calculate the actual weight of supplied materials and the product of described logic coefficient after producing, obtain the theory weighing value of producing rear supplied materials;
(4) use described weigher to weigh the described supplied materials weight after producing, obtain the weigher displayed value of supplied materials after described production;
(5) calculate the difference of the weigher displayed value of supplied materials after the theory weighing value of supplied materials after described production and described production, if described difference exceeds test stone, then carry out abnormal alarm, carry out inspection and the calibration of weigher.
2. the method for supervising of weigher accuracy in production run according to claim 1, is characterized in that: in described step (1), and described weigher, through calibration, meets measurement standard.
3. the method for supervising of weigher accuracy in production run according to claim 1 and 2, is characterized in that: in described step (2), and the actual weight of described supplied materials is obtained by the weighing of other scales.
4. the method for supervising of weigher accuracy in production run according to claim 3, is characterized in that: in described step (5), described test stone is formulated according to GB SPC.
5. the method for supervising of weigher accuracy in production run according to claim 4, is characterized in that: in described step (5), and described standard is 3 times of historical data standard deviations, exceeds for exception.
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| CN102840904B true CN102840904B (en) | 2015-10-21 |
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| CN105136270A (en) * | 2015-10-21 | 2015-12-09 | 北京金日新事业技术有限公司 | Nuclear scale fault diagnosis device and using method |
| CN110133182B (en) * | 2019-04-01 | 2021-10-22 | 河南中烟工业有限责任公司 | Method for evaluating usability of cigarette tobacco shreds by adopting filling coefficient |
| CN109916496B (en) * | 2019-04-11 | 2020-01-24 | 深圳市深信信息技术有限公司 | Monitoring method and system of electronic scale |
| CN112345056B (en) * | 2020-10-13 | 2022-07-22 | 河钢股份有限公司承德分公司 | Method for calibrating and verifying precision of decrement scale by substitute |
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