CN103900674A - Accuracy judging method of weighing system composed of multiple electronic belt scales - Google Patents
Accuracy judging method of weighing system composed of multiple electronic belt scales Download PDFInfo
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- CN103900674A CN103900674A CN201210583233.XA CN201210583233A CN103900674A CN 103900674 A CN103900674 A CN 103900674A CN 201210583233 A CN201210583233 A CN 201210583233A CN 103900674 A CN103900674 A CN 103900674A
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Abstract
The invention discloses an accuracy judging method of a weighing system composed of multiple electronic belt scales in a blending process. A control computer carries out the steps that S1, at any moment t, the difference between the sum of the instantaneous cumulative weights of all sub scales and the instantaneous cumulative weight of a chief scale is calculated and is recorded as an instantaneous absolute deviation weight; S2, the difference between the instantaneous absolute deviation weight Y at the moment of t0 and a preset reference average value X is recorded as a deviation value Z; S3, the deviation value Z is compared with a preset deviation value interval; if the deviation value Z exceeds the preset deviation value interval, a step S41 is carried out; and otherwise, a step S42 is carried out. According to the step S41, an alarm signal is sent. According to the step S42, operation continues. According to the method provided by the invention, the accuracy of the electronic belt scales can be judged in real time, and the stability of the quality of production process is improved.
Description
Technical field
The present invention relates to tobacco manufacture field, be in particular the determination methods that is applied to the accuracy of mixing the Weighing system being formed by multiple belted electronic balances in allotment of labor's order, can be applicable in the operations such as pipe tobacco proportioning perfuming.
Background technology
Belted electronic balance is most popular belt conveyer scale, is made up of parts such as load carrier, LOAD CELLS, speed pickup and displays.While weighing, load carrier by the weight transfer of material on belt on LOAD CELLS, LOAD CELLS exports voltage (mV) signal that is proportional to material gravity, after amplifier amplifies, flow to A/D converter and become digital quantity A, deliver to arithmetical unit (arithmetical unit can be positioned at the controller that belted electronic balance carries, and also can be positioned at the controller of other setting); Speed pickup is positioned on stern roll or slewing for measuring the travelling speed of belt, and speed pickup output umber of pulse B, also delivers to arithmetical unit; Arithmetical unit carries out, after integral operation, obtaining the inventory of this measuring period to A, B.To adding up each measuring period, the material cumulative amount that can obtain passing through continuously on belt.Instantaneous weight is the weight that is positioned at the material on the belt of belted electronic balance, can from display, read.From weighing principle, the size of the instantaneous weight of the measured material of belted electronic balance depends on two parameters, be that instantaneous weight equals two parameters of belt speed value v (m/s) that on the measured carrier of LOAD CELLS, material load value q (kg/m) and speed pickup measure gained that multiplies each other, by the instantaneous weight in certain hour, the time is carried out to integration and can calculate instantaneous cumulative weight, demonstrate instantaneous weight (weight of material on belt) and instantaneous cumulative weight (weight of all materials by belt) by display.
The controller of belted electronic balance can adopt conventional industrial controller, as PLC(programmable logic controller (PLC)) etc.The instantaneous weight value of belted electronic balance need to be set according to technique, according to the performance difference of controller, this numerical value can be directly set on controller, also can send corresponding parameters to controller by host computer (as PC).The belt of belted electronic balance is driven by alternating current generator, by the rotating speed of the Frequency Converter Control motor controlled by PLC, can control the speed of belt, thereby changes the instantaneous weight of the material on belted electronic balance.
In tobacco processing course, scrap prodn. line proportioning perfuming operation belongs to special process, and special process refers to that some crudy is difficult for maybe can not obtaining the fully process (operation) of checking by its follow-up inspection or test.Fig. 1 shows the Weighing system that pipe tobacco proportioning perfuming operation is used, include four electronic scaless, wherein have one for the cut tobacco scale 11, that claim cut tobacco for the stem scale 12, that claim stem for claiming the sheet and shreds scale 13 of sheet and shreds and one for claiming the mixed silk scale 20 of the mixed mixed silk weight of cut tobacco, stem and sheet and shreds.The effect difference that played therein according to each electronic scales, is divided into point scale of each component materials for weighing composition mixture material by them and for weighing total scale of mixture.Be exactly proportioning perfuming operation is mixed into various ingredients the process of mixture, above-mentioned cut tobacco scale, stem scale, sheet and shreds scale are a point scale, total mixed silk scale is scale, after the mixing of materials flowing through, after total scale, are sent to next process from point scale.Theoretically, total scale at any time the instantaneous accumulating weight of t equal the instantaneous accumulating weight sum of each point of scale certain hour (needing a period of time because the material on point scale arrives on total scale) before moment t.
Stem in pipe tobacco and the weight of sheet and shreds are to mix and join according to cut tobacco weighing amount (flow) and preset proportion, and spices is mixed and joined according to mixed silk scale flow and preset proportion.Above-mentioned mixing joined in process, and measurement problem appears in any belted electronic balance, all can cause quality problems, can not make up, and causes huge economic loss.In the Weighing system of the multiple belted electronic balances compositions of discovery in time, there is belted electronic balance to occur that metering fault becomes problem demanding prompt solution.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of for judging the method for belted electronic balance accuracy of Weighing system of pipe tobacco proportioning perfuming operation, can in the time that appearring in belted electronic balance, metering fault find in time, solve the problem that the various outer permeation material of pipe tobacco primary processing line and mixture weight metering accuracy cannot judge in time, improve the stability of production run crudy.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: the determination methods of the accuracy of the Weighing system of multiple belted electronic balance compositions, described Weighing system comprises multiple belted electronic balances of being controlled computing machine institute controlling run, and described belted electronic balance is divided into for weighing every kind to be mixed and join multiple points of scales of material and for weighing by the described total scale of joining the mixture that material forms of mixing; Carry out following steps by described control computing machine:
S1: calculate the difference between the instantaneous cumulative weight sum of each point of scale of any time t and the instantaneous cumulative weight of total scale, be designated as instantaneous absolute deviation weight;
S2: by t
0the instantaneous absolute deviation weight Y in moment and predefined difference with reference to mean value X are designated as deviate Z;
S3: deviate Z and default deviate interval are compared, if deviate Z exceedes default deviate interval, perform step S41, otherwise execution step S42;
S41: send alerting signal;
S42: continue operation.
As preferably, determination methods of the present invention is carried out following steps in execution step S2:
Calculate described t
0the absolute value of the deviate Z in moment and t
0the ratio of the instantaneous accumulating weight W of described total scale in moment, is designated as precision p; And when comparing deviate Z and default deviate interval, step S3 carries out following steps: by precision p and predetermined value comparison, if reached, precision p exceedes predetermined value or deviate Z exceedes the arbitrary condition in default deviate interval, perform step S41, otherwise execution step S42.
As preferably, in determination methods of the present invention, the account form of the mean value X of predefined reference is: instantaneous absolute deviation weight is sampled, calculate the arithmetic mean of sample value.
As preferably, described multiple points of scales comprise that a main scale and at least one are from scale, describedly adjust its instantaneous weight from scale according to the instantaneous weight of described main scale and predetermined ratio.
As preferably, determination methods of the present invention, if in step S3, if deviate Z exceedes between default deviation area, when precision p exceedes predetermined value simultaneously, after S41, increases following steps:
S5: all belted electronic balances of described control computer control are out of service.
Beneficial effect of the present invention is: adopt determination methods of the present invention to make real-time judge to the accuracy of mixing the belted electronic balance of joining various materials, while there is metering fault in any belted electronic balance, all can find in time, thereby improve the stability of production run crudy.
Brief description of the drawings
Fig. 1 is the composition frame chart of the weighing system in pipe tobacco proportioning perfuming operation.
Fig. 2 is the process flow diagram of the determination methods of the accuracy of the Weighing system being made up of multiple belted electronic balances of embodiments of the invention one.
Fig. 3 is the process flow diagram of the determination methods of the accuracy of the Weighing system being made up of multiple belted electronic balances of embodiments of the invention two.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Referring to Fig. 1 the Weighing system being used in proportioning perfuming operation is described as example in tobacco processing course.From the above, in this Weighing system, cut tobacco scale 11, stem scale 12, sheet and shreds scale 13 are a point scale, are total scale for the mixed silk scale 20 that claims the mixed mixed silk weight of cut tobacco, stem and sheet and shreds.Described point of scale, total scale are the belted electronic balance of being controlled computer control operation.Fig. 2 is the process flow diagram of the determination methods of the accuracy of the Weighing system being made up of multiple belted electronic balances of embodiments of the invention one, and the wherein flow process in rectangle frame 500, corresponding to the technical scheme of above-mentioned independent claims.With reference to the process flow diagram shown in Fig. 2, the determination methods of the accuracy of the Weighing system being made up of multiple belted electronic balances of the present invention is carried out following steps by described control computing machine:
S1: calculate the difference between the instantaneous cumulative weight sum of each point of scale of any time t and the instantaneous cumulative weight of total scale, be designated as instantaneous absolute deviation weight;
S2: calculate t
0the instantaneous absolute deviation weight Y in moment, by t
0the instantaneous absolute deviation weight Y in moment and the difference of mean value X are designated as deviate Z.Under normal conditions, not taking into account system error, Zong the difference between instantaneous cumulative weight sum and the instantaneous cumulative weight of scale of point scale, be exactly namely instantaneous absolute deviation weight, in fact by a point scale, does not also reach the quality sum of those materials of total scale.Therefore, predefined can be according to the range estimation of the flow of each point of scale, speed and the total scale of distance out with reference to mean value X, also can check that each belted electronic balance is all in normal situation, by gathering the instantaneous cumulative weight of point scale and total scale in several moment, calculate respectively its difference and ask and calculate mean value and obtain.S3: deviate Z and default deviate interval are compared, if deviate Z exceedes default deviate interval, perform step S41, otherwise execution step S42;
S41: report to the police;
S42: continue operation.
As described above, theoretically, total scale difference that the instantaneous accumulating weight of t equals the instantaneous accumulating weight sum of any time t of each point of scale at any time should be a fixing numerical value, but owing to existing the error of permission and the fluctuation of operation, in fact, allow to have certain deviate interval between the instantaneous accumulating weight of total scale and the instantaneous accumulating weight sum of each point of scale, this default deviate interval can input control computing machine, in the time that deviate Z exceeds deviate interval, think and occur metering fault, send and report to the police and/or send the steering order of shutdown, all belted electronic balances are out of service.
The data that above-mentioned default deviate interval gathers can normally move according to equipment time calculate through the method for statistics, also can rule of thumb set.For example, can be in the time that all belted electronic balances normally move, get a period of time as 1 hour, at regular intervals, as within 1 minute, recorded instantaneous absolute deviation weight Y, and the mean value X of calculating instantaneous absolute deviation weight within the time before, the account form of the mean value X of instantaneous absolute deviation weight, can adopt integral method also can adopt sampling to ask the method for arithmetic mean.End points using the maximal value of the deviate Z trying to achieve when the normal operation and minimum value as default deviate interval, or condition is relaxed.Be about to largerly than this maximal value, the end points than the smaller numerical value of minimum value as default deviate interval, avoids wrong report.What in addition, default deviate interval can also arrange according to the requirement of the product of producing is greater or lesser.
Warning in above-mentioned S41 step can be sent alerting signal for controlling computing machine, and alerting signal is sent to sounding or light-emitting device, and warning related personnel adjust.Control computing machine self and also can send alerting signal in the mode of word or sound.
Further; still move in the time that metering fault appears in certain belted electronic balance in order to prevent whole system; infringement product quality; can also be further; increase the step of auto stop operation; by control computing machine to each belted electronic balance with controller (may be also connected PLC) send instruction out of service, each belt conveyer scale is out of service, waits to be adjusted.
As shown in Figure 3, implement two and be with the difference of embodiment mono-, in execution step S2, carry out following steps: calculate described t
0the absolute value of the deviate Z in moment and t
0the ratio of total scale weight W in moment, is designated as precision p;
And when comparing deviate Z and default deviate interval, step S3 carries out following steps: by precision p and predetermined value comparison, if reached, precision p exceedes predetermined value or deviate Z exceedes the arbitrary condition in default deviate interval, perform step S41, otherwise execution step S42.Definite mode of the predetermined value of precision p and above-mentioned deviate interval are similar, repeat no more.
Certainly, in step S3, if deviate Z exceedes between default deviation area, when precision p exceedes predetermined value simultaneously, can also after the step S41 of the method for embodiment bis-, increase following steps, S5: all belted electronic balances of described control computer control are out of service.Only have in the time that deviate Z and two parameters of precision p all exceed predetermined condition, just think and have belted electronic balance to break down, prevent mistakenly stop machine.
Mixing in allotment of labor's order, often there is a kind of main material, cut tobacco scale 11 as above, stem scale 12, in sheet and shreds scale 13, cut tobacco scale 11 is main scale, stem scale 12 and sheet and shreds scale 13 are from scale, stem scale 12 and sheet and shreds scale 13 are according to the instantaneous weight of cut tobacco scale 11, adjust its instantaneous weight, certainly, in the certain situation of other conditions, instantaneous weight is proportional to belt speed, belt travelling speed as the stem scale 12 from scale and sheet and shreds scale 13 determines according to the instantaneous velocity of the belt of cut tobacco scale 11, the belt travelling speed of stem scale 12 and sheet and shreds scale 13 can realize by the mode of the rotating speed of Frequency Converter Control motor.
Use the cumulative weight of the cut tobacco scale of method of the present invention to proportioning perfuming operation, stem scale, sheet and shreds scale and contrast in real time with the cumulative weight of mixed silk scale, finding out experimental actual difference between the two.Actual difference is carried out to statistical study, find out the normal fluctuation range of actual production.Control computing machine the data that exceed normal fluctuation range are reported to the police, and it is out of service further to control belted electronic balance.
Above-described embodiment only describes with the Weighing system that comprises three points of scales and a total scale, in fact, the present invention can be applied in the Weighing system of more points of scales and a total scale composition, and be not only applied in Cigarette processing process, also can be widely used in and use mixing in allotment of labor's order of measuring of multiple belted electronic balances, realize the Real-Time Monitoring to belted electronic balance operation, in the time there is metering fault in any belted electronic balance, no matter be main scale or point scale generation metering fault, can both find in time, adjust in time, ensured product quality.
Above embodiment is only exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can, in essence of the present invention and protection domain, make various amendments or be equal to replacement the present invention, this amendment or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (5)
1. the determination methods of the accuracy of the Weighing system of many belted electronic balance compositions, described Weighing system comprises multiple belted electronic balances of being controlled computing machine institute controlling run, and described belted electronic balance is divided into for weighing every kind to be mixed and join multiple points of scales of material and for weighing by the described total scale of joining the mixture that material forms of mixing; It is characterized in that, carry out following steps by described control computing machine:
S1: calculate the difference between the instantaneous cumulative weight sum of each point of scale of any time t and the instantaneous cumulative weight of total scale, be designated as instantaneous absolute deviation weight;
S2: by t
0the instantaneous absolute deviation weight Y in moment and predefined difference with reference to mean value X are designated as deviate Z;
S3: deviate Z and default deviate interval are compared, if deviate Z exceedes default deviate interval, perform step S41, otherwise execution step S42;
S41: send alerting signal;
S42: continue operation.
2. determination methods as claimed in claim 1, is characterized in that, carries out following steps in execution step S2:
Calculate described t
0the absolute value of the deviate Z in moment and t
0the ratio of the instantaneous accumulating weight W of described total scale in moment, is designated as precision p;
And when comparing deviate Z and default deviate interval, carries out step S3 following steps:
By precision p and predetermined value comparison, if reached, precision p exceedes predetermined value or deviate Z exceedes the arbitrary condition in default deviate interval, performs step S41, otherwise execution step S42.
3. determination methods as claimed in claim 1 or 2, is characterized in that,
The described predefined account form with reference to mean value X is: instantaneous absolute deviation weight is sampled, calculate the arithmetic mean of sample value.
4. determination methods as claimed in claim 1 or 2, is characterized in that, described multiple points of scales comprise that a main scale and at least one are from scale, describedly adjusts its instantaneous weight from scale according to the instantaneous weight of described main scale and predetermined ratio.
5. determination methods as claimed in claim 2, is characterized in that, if in step S3, if deviate Z exceedes between default deviation area, when precision p exceedes predetermined value simultaneously, after S41, increases following steps:
S5: all belted electronic balances of described control computer control are out of service.
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Cited By (11)
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| CN104568087A (en) * | 2015-01-06 | 2015-04-29 | 莱芜钢铁集团电子有限公司 | Material control system |
| CN106404436A (en) * | 2016-08-26 | 2017-02-15 | 唐山钢铁集团有限责任公司 | Method for determining feeding precision of belt type feeder rapidly |
| CN107235308A (en) * | 2017-07-06 | 2017-10-10 | 江苏永钢集团有限公司 | A kind of proportioning belt scale off-axis detects warning system |
| CN108490841A (en) * | 2018-04-28 | 2018-09-04 | 四川隧唐科技股份有限公司 | Beam piece production process update method, device, management system and storage medium |
| CN109315823A (en) * | 2018-08-30 | 2019-02-12 | 广东中烟工业有限责任公司 | A kind of cut tobacco scale flow autocontrol method |
| CN109619644A (en) * | 2018-12-06 | 2019-04-16 | 河南中烟工业有限责任公司 | A kind of tobacco flavoring charging system abnormal alarm method |
| CN110455393A (en) * | 2019-09-02 | 2019-11-15 | 国家能源集团谏壁发电厂 | A kind of belted electronic balance method for real-time monitoring that accuracy is high |
| CN113777353A (en) * | 2021-09-10 | 2021-12-10 | 新余钢铁股份有限公司 | Fault diagnosis method for belt scale speed sensor |
| CN113834558A (en) * | 2020-06-24 | 2021-12-24 | 宝山钢铁股份有限公司 | Remote fault detection method for steel ladle weighing sensor |
| CN114543952A (en) * | 2022-01-06 | 2022-05-27 | 红云红河烟草(集团)有限责任公司 | Error self-compensation method of electronic belt scale for cigarette production |
| CN115655427A (en) * | 2022-10-26 | 2023-01-31 | 上海冉青信息技术有限公司 | Material breaking and weighing automatic control method for material taking and loading process |
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| CN104568087B (en) * | 2015-01-06 | 2017-05-10 | 莱芜钢铁集团电子有限公司 | Material control system |
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| CN106404436A (en) * | 2016-08-26 | 2017-02-15 | 唐山钢铁集团有限责任公司 | Method for determining feeding precision of belt type feeder rapidly |
| CN107235308A (en) * | 2017-07-06 | 2017-10-10 | 江苏永钢集团有限公司 | A kind of proportioning belt scale off-axis detects warning system |
| CN108490841B (en) * | 2018-04-28 | 2020-01-10 | 四川隧唐科技股份有限公司 | Beam piece production process updating method, device, management system and storage medium |
| CN108490841A (en) * | 2018-04-28 | 2018-09-04 | 四川隧唐科技股份有限公司 | Beam piece production process update method, device, management system and storage medium |
| CN109315823A (en) * | 2018-08-30 | 2019-02-12 | 广东中烟工业有限责任公司 | A kind of cut tobacco scale flow autocontrol method |
| CN109619644A (en) * | 2018-12-06 | 2019-04-16 | 河南中烟工业有限责任公司 | A kind of tobacco flavoring charging system abnormal alarm method |
| CN110455393A (en) * | 2019-09-02 | 2019-11-15 | 国家能源集团谏壁发电厂 | A kind of belted electronic balance method for real-time monitoring that accuracy is high |
| CN113834558A (en) * | 2020-06-24 | 2021-12-24 | 宝山钢铁股份有限公司 | Remote fault detection method for steel ladle weighing sensor |
| CN113777353A (en) * | 2021-09-10 | 2021-12-10 | 新余钢铁股份有限公司 | Fault diagnosis method for belt scale speed sensor |
| CN114543952A (en) * | 2022-01-06 | 2022-05-27 | 红云红河烟草(集团)有限责任公司 | Error self-compensation method of electronic belt scale for cigarette production |
| CN115655427A (en) * | 2022-10-26 | 2023-01-31 | 上海冉青信息技术有限公司 | Material breaking and weighing automatic control method for material taking and loading process |
| CN115655427B (en) * | 2022-10-26 | 2023-04-28 | 上海冉青信息技术有限公司 | Material breaking and weighing automatic control method for material taking and loading process |
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