CN103472195A - Method for determining measurement accuracy of on-line moisture meter through SPC - Google Patents

Method for determining measurement accuracy of on-line moisture meter through SPC Download PDF

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Publication number
CN103472195A
CN103472195A CN2013104635095A CN201310463509A CN103472195A CN 103472195 A CN103472195 A CN 103472195A CN 2013104635095 A CN2013104635095 A CN 2013104635095A CN 201310463509 A CN201310463509 A CN 201310463509A CN 103472195 A CN103472195 A CN 103472195A
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moisture meter
online moisture
criterion
points
accuracy
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CN103472195B (en
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陈冉
邹泉
杨光涛
戚文辉
赵云川
肖文平
高晓华
刘�文
周明
董润美
蔡媛
旃艳琼
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Hongta Tobacco Group Co Ltd
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Hongta Tobacco Group Co Ltd
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Abstract

The invention discloses a method for determining measurement accuracy of an on-line moisture meter through SPC. According to the requirements of production, the purpose of meeting the requirements of measurement and the purpose of meeting the requirement for facilitating operation are taken account of, when the on-line moisture meter is produced, three channels of a production on-line moisture meter are built corresponding to each of an upper portion, a middle portion and a lower portion of each tobacco leaf, six channels of a special grade are further built, and the total number of the built channels is 15; or the channels are built according to the number on a mark board and the working procedures, and comparison is carried out on each channel. Statistical analysis of a primary determination and the measurement process is carried out on accuracy of the on-line moisture meter through basic errors according to comparison data. According to the method for determining measurement accuracy of the on-line moisture meter through SPC, an SPC control chart is used for analyzing stability of measurement accuracy of the on-line moisture meter of tobacco production, accuracy of moisture measurement of tobacco products is improved, the situation that the percent of pass of moisture of the tobacco leaves is greatly improved is ensured, whole-process monitoring is carried out on the production process, random fluctuation and abnormal fluctuation of product quality in the production process are scientifically distinguished, the influence of the random fluctuation and abnormal fluctuation is eliminated by taking measures, and the production process is kept to be in the controllable state that the production process is only influenced by random factors.

Description

Utilize SPC to carry out method for measuring to online Moisture Meter measurement accuracy
Technical field
The present invention discloses a kind of SPC of utilization online Moisture Meter measurement accuracy is carried out to method for measuring.
Background technology
In the past, the online Moisture Meter in tobacco enterprise redrying workshop was divided into top, middle part, 3 of bottoms passage by position, and passage is set up according to the trade mark in the throwing workshop, and the mensuration of accuracy is just simply carried out static Comparison calibration to each passage.Show in daily test process that online Moisture Meter is after adjustment at zero point accurately, its at zero point value can be in time, the factor occurrence tendency skew (as shown in Figure 1) such as environment.
All there is measuring error in test process, cause in production run whole online Moisture Meter measuring accuracy deviation larger, make that the online production quality is unstable, fluctuation is large, be difficult to control; Strengthened the difficulty of moisture comparison work simultaneously, can't make accuracy to online Moisture Meter precision and measure.
Summary of the invention
The object of the invention is to overcome above-mentioned prior art deficiency, provide a kind of SPC of utilization to the method for measuring of the online Moisture Meter accuracy of production of cigarettes process, the stability of controlling to improve online Moisture Meter measuring accuracy and online production procedure quality.
The present invention utilizes SPC to carry out the method for measuring technical scheme to online Moisture Meter measurement accuracy:
To produce online Moisture Meter according to 3 positions of tobacco leaf upper, middle and lower, 3 passages are set up at each position, and specific class is set up respectively again 6 passages, vertical 15 passages of building together; Or set up passage according to the trade mark, operation, and each passage is carried out to dynamic comparison;
Use the SPC control technology and, in conjunction with " cigarette process standard ", set up data treatment principle, the tendency accuracy of online Moisture Meter contrastive test and measure rule and control flow;
Adopt fundamental error σ, σ=Y-X, Y means online Moisture Meter displayed value, and X means the baking oven value, the accuracy of online Moisture Meter is carried out to the statistical study of Preliminary Determination and measuring process, and concrete steps are:
(1), online Moisture Meter Determination,
(1), determine Interventions Requested and the frequency, complete sampling, test, the data typing of contrastive test;
(2), sampling, detection method: 20-50cm place sampling behind Moisture Meter probe position, when in online Moisture Meter displayed value 10s, fluctuation is less than 0.2%, capture continuously the top layer material 5 times in the regulation sample position, get 50g, and the displayed value of the online Moisture Meter of synchronous recording, record result and be accurate to 2 significant digits; Good seal after air in the necessary discharge in time of the sample of getting sealing bag, and enclose label, indicate the online Moisture Meter demonstration of this sample water percentage, sampling sequence number, grade;
(2). check " online Moisture Meter contrastive test record " control chart per working day, and measure criterion by online Moisture Meter accuracy control chart is measured; Carry out adjustment or checking to measuring undesirable operation Moisture Meter passage, and adjustment, the result are fed back to relevant departments in time;
(3). sampling in accordance with regulations batch and test item sampling Oven Method detect moisture, and each operation online Moisture Meter displayed value Y and baking oven measurement result X are compared, and draw fundamental error δ; The typing of all detection data is counted to " the moisture comparison data " hurdle in extraction system, and the number extraction system generates " online Moisture Meter contrastive test tables of data " automatically;
(4). data acquisition generates " online Moisture Meter contrastive test Data Control figure " automatically according to detecting data, and comparison personnel and workshop gauger measure criterion according to online Moisture Meter detection accuracy control chart is carried out to evaluation of measuring;
Mensuration meets the requirements and illustrates that online Moisture Meter is controlled; Measure undesirablely, by the workshop gauger, carry out adjustment, after adjustment by the comparison personnel again sub-sampling compare, by that analogy.
It is as follows that described online Moisture Meter accuracy is measured criterion:
The redrying production line: any in following principle appears in same operation, same Moisture Meter passage fundamental error σ, measures online Moisture Meter detection accuracy and does not meet technological requirement;
Tobacco leaf section: control limit ± 1.50%
Criterion one: continuous 2 points drop on ± 1.00% outside;
Criterion two: in continuous 5 points, have 4 points drop on ± 0.50% outside.
Blade sections: control limit ± 1.00%
One: 1 point of criterion drops on ± 1.00% outside (exceeding the standard range of control);
Criterion two: continuous 2 points drop on ± 0.66% outside;
Criterion three: in continuous 5 points, have 4 points drop on ± 0.33% outside,
Primary processing line: any in following principle appears in same operation, same Moisture Meter passage fundamental error δ, measures online Moisture Meter detection accuracy and does not meet technological requirement.
Blade sections: σ=0.33%
Criterion one: outside continuous drop on ± 2 σ of 2 points;
Criterion two: have in continuous 5 points outside drop on ± 1 σ of 4 points.
Cut tobacco section (containing the stem section): σ=0.2%
Outside drop on ± 3 σ of one: 1 point of criterion;
Criterion two: outside continuous drop on ± 2 σ of 2 points;
Criterion three: have in continuous 5 points outside drop on ± 1 σ of 4 points.
The inventive method
Utilize the SPC control chart to analyze the stability that tobacco produces online Moisture Meter measuring accuracy, improved the accuracy of tobacco product moisture measurement, guaranteed that the qualification rate of moisture content in leaves increases substantially.Production run is carried out to complete monitoring, the random fluctuation of distinguishing product quality in production run and the unusual fluctuations of science, and take measures to eliminate its impact, make process maintain the slave mode that affected by random factor, thereby reach steady middle raising of product quality.
The accompanying drawing explanation
Fig. 1 means that online Moisture Meter is after adjustment at zero point accurately, its at zero point value can be in time, the factor occurrence tendency skew such as environment.In figure, Y means online Moisture Meter displayed value, and X means the baking oven value;
Fig. 2 is the online Moisture Meter contrastive test of redrying of the present invention record controls figure.
Fig. 3 is the online Moisture Meter contrastive test of redrying of the present invention record controls figure.
Fig. 4 is the online Moisture Meter contrastive test of redrying of the present invention record controls figure.
Fig. 5 is the online Moisture Meter contrastive test of redrying of the present invention record controls figure.
Fig. 6 is the online Moisture Meter contrastive test of throwing of the present invention record controls figure.
Fig. 7 is the online Moisture Meter contrastive test of the inventive method redrying production line data (subordinate list 1).
Fig. 8 is the inventive method primary processing line online Moisture Meter contrastive test data (subordinate list 2) in production run in month.
Embodiment
Accompanying drawing and form below in conjunction with back, be described in further details the inventive method.
The present invention specifically will produce online Moisture Meter according to 3 positions of tobacco leaf upper, middle and lower, and 3 passages are set up at each position, and specific class is set up respectively again 6 passages, vertical 15 passages of building together; Or set up passage according to the trade mark, operation, and each passage is carried out to dynamic comparison.Use the SPC control technology and, in conjunction with " cigarette process standard ", set up data treatment principle, the tendency accuracy of online Moisture Meter contrastive test and measure rule and control flow.
Will produce online Moisture Meter according to 3 positions of tobacco leaf upper, middle and lower, 3 passages are set up at each position, and specific class is set up respectively again 6 passages, vertical 15 passages of building together; Or set up passage according to the trade mark, operation, and each passage is carried out to dynamic comparison;
Use the SPC control technology and, in conjunction with " cigarette process standard ", set up data treatment principle, the tendency accuracy of online Moisture Meter contrastive test and measure rule and control flow;
Adopt fundamental error σ, σ=Y-X, Y means online Moisture Meter displayed value, and X means the baking oven value, the accuracy of online Moisture Meter is carried out to the statistical study of Preliminary Determination and measuring process, and concrete steps are:
(1), online Moisture Meter Determination,
(1), determine Interventions Requested and the frequency, complete sampling, test, the data typing of contrastive test;
(2), sampling, detection method: 20-50cm place sampling behind Moisture Meter probe position, when in online Moisture Meter displayed value 10s, fluctuation is less than 0.2%, capture continuously the top layer material 5 times in the regulation sample position, get 50g, and the displayed value of the online Moisture Meter of synchronous recording, record result and be accurate to 2 significant digits; Good seal after air in the necessary discharge in time of the sample of getting sealing bag, and enclose label, indicate the online Moisture Meter demonstration of this sample water percentage, sampling sequence number, grade;
(2). check " online Moisture Meter contrastive test record " control chart per working day, and measure criterion by online Moisture Meter accuracy control chart is measured; Carry out adjustment or checking to measuring undesirable operation Moisture Meter passage, and adjustment, the result are fed back to relevant departments in time;
(3). sampling in accordance with regulations batch and test item sampling Oven Method detect moisture, and each operation online Moisture Meter displayed value Y and baking oven measurement result X are compared, and draw fundamental error δ; The typing of all detection data is counted to " the moisture comparison data " hurdle in extraction system, and the number extraction system generates " online Moisture Meter contrastive test tables of data " automatically;
(4). data acquisition generates " online Moisture Meter contrastive test Data Control figure " automatically according to detecting data, and comparison personnel and workshop gauger measure criterion according to online Moisture Meter detection accuracy control chart is carried out to evaluation of measuring;
Mensuration meets the requirements and illustrates that online Moisture Meter is controlled; Measure undesirablely, by the workshop gauger, carry out adjustment, after adjustment by the comparison personnel again sub-sampling compare, by that analogy.
It is as follows that described online Moisture Meter accuracy is measured criterion:
The redrying production line: any in following principle appears in same operation, same Moisture Meter passage fundamental error σ, measures online Moisture Meter detection accuracy and does not meet technological requirement;
Tobacco leaf section: control limit ± 1.50%
Criterion one: continuous 2 points drop on ± 1.00% outside;
Criterion two: in continuous 5 points, have 4 points drop on ± 0.50% outside.
Blade sections: control limit ± 1.00%
One: 1 point of criterion drops on ± 1.00% outside (exceeding the standard range of control);
Criterion two: continuous 2 points drop on ± 0.66% outside;
Criterion three: in continuous 5 points, have 4 points drop on ± 0.33% outside,
Primary processing line: any in following principle appears in same operation, same Moisture Meter passage fundamental error δ, measures online Moisture Meter detection accuracy and does not meet technological requirement.
Blade sections: σ=0.33%
Criterion one: outside continuous drop on ± 2 σ of 2 points;
Criterion two: have in continuous 5 points outside drop on ± 1 σ of 4 points.
Cut tobacco section (containing the stem section): σ=0.2%
Outside drop on ± 3 σ of one: 1 point of criterion;
Criterion two: outside continuous drop on ± 2 σ of 2 points;
Criterion three: have in continuous 5 points outside drop on ± 1 σ of 4 points.
The present invention adopts fundamental error σ: σ=Y-X(Y to mean online Moisture Meter displayed value, and X means the baking oven value), the accuracy of online Moisture Meter is carried out to the statistical study of Preliminary Determination and measuring process, it is as follows that online Moisture Meter accuracy is measured criterion:
1. redrying production line: any in following principle appears in same operation, same Moisture Meter passage fundamental error σ, measures online Moisture Meter detection accuracy and does not meet technological requirement.
Tobacco leaf section: control limit ± 1.50%
Criterion one: continuous 2 points drop on ± 1.00% outside;
Criterion two: in continuous 5 points, have 4 points drop on ± 0.50% outside.
Blade sections: control limit ± 1.00%
One: 1 point of criterion drops on ± 1.00% outside (exceeding the standard range of control);
Criterion two: continuous 2 points drop on ± 0.66% outside;
Criterion three: in continuous 5 points, have 4 points drop on ± 0.33% outside.
2, primary processing line: any in following principle appears in same operation, same Moisture Meter passage fundamental error δ, measures online Moisture Meter detection accuracy and does not meet technological requirement.
Blade sections: σ=0.33%
Criterion one: outside continuous drop on ± 2 σ of 2 points;
Criterion two: have in continuous 5 points outside drop on ± 1 σ of 4 points.
Cut tobacco section (containing the stem section): σ=0.2%
Outside drop on ± 3 σ of one: 1 point of criterion;
Criterion two: outside continuous drop on ± 2 σ of 2 points;
Criterion three: have in continuous 5 points outside drop on ± 1 σ of 4 points.
One, online Moisture Meter Determination
1, determine Interventions Requested and the frequency, complete sampling, test, the data typing of contrastive test.
2, sampling, detection method: 20-50cm place sampling behind Moisture Meter probe position, when in online Moisture Meter displayed value 10s, fluctuation is less than 0.2%, capture continuously the top layer material 5 times in the regulation sample position, about 50g, and the displayed value of the online Moisture Meter of synchronous recording, record result and be accurate to 2 significant digits.After the necessary good seal in time of the sample of getting (discharging air in sealing bag), and enclose label, indicate the online Moisture Meter demonstration of this sample water percentage, sampling sequence number, grade.
Two. check " online Moisture Meter contrastive test record " control chart per working day, and measure criterion by accuracy control chart is measured: meet the requirements if measure, by the 1st execution; If measure undesirable, by the 4th execution; Carry out adjustment or checking to measuring undesirable operation Moisture Meter passage, and adjustment, the result are fed back to relevant departments in time, see accompanying drawing 2-Fig. 5.
Three. sampling in accordance with regulations batch and test item adopt Oven Method to detect moisture, and each operation online Moisture Meter displayed value Y and baking oven measurement result X are compared, and draw fundamental error δ.The typing of all detection data is counted to " the moisture comparison data " hurdle in extraction system, and the number extraction system generates " online Moisture Meter contrastive test tables of data " automatically, as shown in subordinate list 1.
Four. number is adopted according to detecting data and is automatically generated " online Moisture Meter contrastive test Data Control figure " as shown in Figure 6, and comparison personnel and workshop gauger measure criterion according to online Moisture Meter detection accuracy control chart is measured.The mensuration online Moisture Meter of explanation that meets the requirements is controlled, measures undesirablely, by the workshop gauger, carries out adjustment, after adjustment by the comparison personnel again sub-sampling compare, by that analogy.
The inventive method, utilize the SPC control chart to analyze the stability that tobacco produces online Moisture Meter measuring accuracy, improved the accuracy of tobacco product moisture measurement, guaranteed that the qualification rate of moisture content in leaves increases substantially.Production run is carried out to complete monitoring, the random fluctuation of distinguishing product quality in production run and the unusual fluctuations of science, and take measures to eliminate its impact, make process maintain the slave mode that affected by random factor, thereby reach steady middle raising of product quality.
1, the related electronic balance sensibility reciprocal of the inventive method is 0.001g.
2, the related oven temperature fluctuation of the inventive method is ± 1 ℃, temperature uniformity ± 2 ℃; The baking oven contrastive test cycle is 1 time/3 months.
3, the related sample box of the inventive method requires stainless steel constant weight punching sample box.
4, the mesh size of the related sample grinding machine of the inventive method (6 ± 0.5) mm, cutter head rotating speed are that (850 ± 5) turn/min, blade space are (0.178 ± 0.076) mm.

Claims (2)

1. one kind is utilized SPC to carry out method for measuring to online Moisture Meter measurement accuracy, it is characterized in that:
To produce online Moisture Meter according to 3 positions of tobacco leaf upper, middle and lower, 3 passages are set up at each position, and specific class is set up respectively again 6 passages, vertical 15 passages of building together; Or set up passage according to the trade mark, operation, and each passage is carried out to dynamic comparison;
Use the SPC control technology and, in conjunction with " cigarette process standard ", set up data treatment principle, the tendency accuracy of online Moisture Meter contrastive test and measure rule and control flow;
Adopt fundamental error σ, σ=Y-X, Y means online Moisture Meter displayed value, and X means the baking oven value, the accuracy of online Moisture Meter is carried out to the statistical study of Preliminary Determination and measuring process, and concrete steps are:
(1), online Moisture Meter Determination,
(1), determine Interventions Requested and the frequency, complete sampling, test, the data typing of contrastive test;
(2), sampling, detection method: 20-50cm place sampling behind Moisture Meter probe position, when in online Moisture Meter displayed value 10s, fluctuation is less than 0.2%, capture continuously the top layer material 5 times in the regulation sample position, get 50g, and the displayed value of the online Moisture Meter of synchronous recording, record result and be accurate to 2 significant digits; Good seal after air in the necessary discharge in time of the sample of getting sealing bag, and enclose label, indicate the online Moisture Meter demonstration of this sample water percentage, sampling sequence number, grade;
(2). check " online Moisture Meter contrastive test record " control chart per working day, and measure criterion by online Moisture Meter accuracy control chart is measured; Carry out adjustment or checking to measuring undesirable operation Moisture Meter passage, and adjustment, the result are fed back to relevant departments in time;
(3). sampling in accordance with regulations batch and test item sampling Oven Method detect moisture, and each operation online Moisture Meter displayed value Y and baking oven measurement result X are compared, and draw fundamental error δ; The typing of all detection data is counted to " the moisture comparison data " hurdle in extraction system, and the number extraction system generates " online Moisture Meter contrastive test tables of data " automatically;
(4). data acquisition generates " online Moisture Meter contrastive test Data Control figure " automatically according to detecting data, and comparison personnel and workshop gauger measure criterion according to online Moisture Meter detection accuracy control chart is carried out to evaluation of measuring;
Mensuration meets the requirements and illustrates that online Moisture Meter is controlled; Measure undesirablely, by the workshop gauger, carry out adjustment, after adjustment by the comparison personnel again sub-sampling compare, by that analogy.
2. the SPC of utilization according to claim 1 carries out method for measuring to online Moisture Meter measurement accuracy, it is characterized in that: it is as follows that described online Moisture Meter accuracy is measured criterion:
The redrying production line: any in following principle appears in same operation, same Moisture Meter passage fundamental error σ, measures online Moisture Meter detection accuracy and does not meet technological requirement;
Tobacco leaf section: control limit ± 1.50%
Criterion one: continuous 2 points drop on ± 1.00% outside;
Criterion two: in continuous 5 points, have 4 points drop on ± 0.50% outside;
Blade sections: control limit ± 1.00%
One: 1 point of criterion drops on ± 1.00% outside (exceeding the standard range of control);
Criterion two: continuous 2 points drop on ± 0.66% outside;
Criterion three: in continuous 5 points, have 4 points drop on ± 0.33% outside,
Primary processing line: any in following principle appears in same operation, same Moisture Meter passage fundamental error δ, measures online Moisture Meter detection accuracy and does not meet technological requirement;
Blade sections: σ=0.33%
Criterion one: outside continuous drop on ± 2 σ of 2 points;
Criterion two: have in continuous 5 points outside drop on ± 1 σ of 4 points;
Cut tobacco section (containing the stem section): σ=0.2%
Outside drop on ± 3 σ of one: 1 point of criterion;
Criterion two: outside continuous drop on ± 2 σ of 2 points;
Criterion three: have in continuous 5 points outside drop on ± 1 σ of 4 points.
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CN105067560A (en) * 2015-07-27 2015-11-18 浙江中烟工业有限责任公司 Automatic comparison type tobacco leaf moisture measurement channel adjustment method
CN105628705A (en) * 2015-12-22 2016-06-01 河南中烟工业有限责任公司 Automatic deviation detection, alarm and rectification method for moisture meters in loosening and conditioning process
CN106370554A (en) * 2016-12-09 2017-02-01 重庆中烟工业有限责任公司 Tobacco-moisture-content detecting and online-moisture-meter monitoring method
CN108037745A (en) * 2017-12-06 2018-05-15 福建摩尔软件有限公司 A kind of inter-linked controlling method and system based on SPC
CN110531033A (en) * 2019-09-27 2019-12-03 龙岩烟草工业有限责任公司 The monitoring method and device, line measuring system for moisture content of online moisture measurement accuracy
CN110567836A (en) * 2019-08-06 2019-12-13 河南中烟工业有限责任公司 method and system for rapidly checking and determining tobacco shred online moisture meter

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CN105067560A (en) * 2015-07-27 2015-11-18 浙江中烟工业有限责任公司 Automatic comparison type tobacco leaf moisture measurement channel adjustment method
CN105067560B (en) * 2015-07-27 2017-11-28 浙江中烟工业有限责任公司 A kind of automatic contrast moisture content in leaves Measurement channel adjusting method
CN105628705A (en) * 2015-12-22 2016-06-01 河南中烟工业有限责任公司 Automatic deviation detection, alarm and rectification method for moisture meters in loosening and conditioning process
CN105628705B (en) * 2015-12-22 2019-01-11 河南中烟工业有限责任公司 A kind of loosening and gaining moisture process Moisture Meter deviation automatic detection warning and method for correcting error
CN106370554A (en) * 2016-12-09 2017-02-01 重庆中烟工业有限责任公司 Tobacco-moisture-content detecting and online-moisture-meter monitoring method
CN108037745A (en) * 2017-12-06 2018-05-15 福建摩尔软件有限公司 A kind of inter-linked controlling method and system based on SPC
CN110567836A (en) * 2019-08-06 2019-12-13 河南中烟工业有限责任公司 method and system for rapidly checking and determining tobacco shred online moisture meter
CN110567836B (en) * 2019-08-06 2022-07-26 河南中烟工业有限责任公司 Method and system for rapidly checking and determining tobacco shred online moisture meter
CN110531033A (en) * 2019-09-27 2019-12-03 龙岩烟草工业有限责任公司 The monitoring method and device, line measuring system for moisture content of online moisture measurement accuracy

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