CN108871542B - Method, device and system for monitoring accuracy of belt scale - Google Patents
Method, device and system for monitoring accuracy of belt scale Download PDFInfo
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- CN108871542B CN108871542B CN201811107935.4A CN201811107935A CN108871542B CN 108871542 B CN108871542 B CN 108871542B CN 201811107935 A CN201811107935 A CN 201811107935A CN 108871542 B CN108871542 B CN 108871542B
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Abstract
The invention relates to a method, a device and a system for monitoring the accuracy of a belt scale. The method for monitoring the accuracy of the belt weigher on the tobacco shred production line comprises the following steps: (1) calculating the theoretical weight N of the tobacco based on the historical process before the tobacco is put on a belt weigher; (2) and comparing the theoretical weight N with the apparent weight M obtained by weighing the tobacco on the belt weigher, judging that the belt weigher is inaccurate when the difference w between the theoretical weight N and the apparent weight M exceeds a threshold interval, and otherwise, judging that the belt weigher is accurate. The method can track the whole process of the belt weigher of the tobacco shred production line and can timely know the abnormity, thereby timely finding out the abnormity of measurement and eliminating the fault.
Description
Technical Field
The invention belongs to the field of tobacco, and particularly relates to a method, a device and a system for monitoring the accuracy of a belt weigher of a tobacco shred production line.
Background
The belt weigher is widely used in tobacco shred production lines. The measurement accuracy of the method plays an important role in the tobacco shred processing technology, and if the monitoring value has large deviation, the processing technology quality of the product is often seriously influenced. In order to ensure the quality stability of the product in the processing process, the accuracy of the product needs to be calibrated regularly, the belt weigher is usually calibrated once a month by adopting weights, and the belt weigher is calibrated once a year by adopting real objects (tobacco materials).
Disclosure of Invention
In some aspects, a method for monitoring belt scale accuracy on a tobacco-shredding line is provided, comprising the steps of:
calculating the theoretical weight N of the tobacco based on the historical process before the tobacco is put on a belt weigher;
and comparing the theoretical weight N with the apparent weight M obtained by weighing the tobacco on the belt weigher, judging that the belt weigher is inaccurate when the difference w between the theoretical weight N and the apparent weight M exceeds a threshold interval, and otherwise, judging that the belt weigher is accurate.
In some embodiments, the belt scale is a belt scale between the kth treatment process and the (k + 1) th treatment process.
In some embodiments, the kth treatment is a bulk conditioning treatment, a leaf conditioning treatment, a cut tobacco treatment, or a flavoring treatment. At the k-th treatment, additional material may be applied to the tobacco, resulting in a change in weight of the tobacco. At the kth treatment, there is a loss of mass of the tobacco, resulting in a change in the weight of the tobacco.
In some embodiments, k is a positive integer. k is 1, 2, 3 or 4. For example, the bulk conditioning treatment is the 1 st treatment, the leaf-moistening treatment is the 2 nd treatment, the cut-tobacco treatment is the 3 rd treatment, and the perfuming treatment is the 4 th treatment.
In some embodiments, the theoretical weight N of tobacco after the kth treatment on a tobacco-shredding line is calculated based on the following formulak，
αkIs the moisture content of the tobacco after the k time of treatment.
In some embodiments, the dry weight of tobacco after the kth treatment is calculated based on the following formula:
tobacco dry weight after k treatment = (1-a)k-1)Mk-1+Pk-Qk；
αk-1Is the moisture content of the tobacco before the kth treatment;
Mk-1is the weight of the tobacco before the kth treatment (e.g. the apparent weight M of the tobacco measured on a belt scalek-1For example, the apparent weight of tobacco measured on a belt weigher between the (k-1) th treatment step and the (k) th treatment step, Mk-1)；
PkOf additional material applied to the tobacco in the kth treatmentDry weight;
Qkis an empirical value of tobacco consumption in the k-th treatment.
In some embodiments, a method of monitoring the accuracy of a belt scale on a tobacco-shredding line, further comprising the steps of:
measurement of moisture content α of tobacco before kth treatmentk-1；
Measuring the weight M of the tobacco before the kth treatmentk-1(e.g. weighing the tobacco M on a belt scalek-1For example, the weight M of tobacco is weighed on a belt weigher between the (k-1) th treatment step and the (k) th treatment stepk-1)；
Measurement of moisture content α of kth processed tobaccok；
Obtaining the dry weight P of the additional material applied to the tobacco in the k-th treatmentk；
Obtaining an empirical value Q of tobacco consumption in the kth treatmentk。
In some embodiments, the empirical value Q is obtained by averaging the tobacco consumption in the kth treatment of a plurality of historical batchesk。
In some embodiments, a normal distribution function is fitted to the difference w between the theoretical weights N and M, and when w exceeds a threshold interval, the belt scale is determined to be inaccurate, otherwise, the belt scale is determined to be accurate.
In some embodiments, the threshold interval is set to [ μ -x σ, μ + y σ ], μ and σ are the expected value and standard deviation, respectively, of a normal distribution function, and x and y are both natural numbers.
In some embodiments, the tobacco-shredding line comprises any one of the following devices (or processes): a loosening and moisture regaining device (or procedure), a leaf moistening and feeding device (or procedure), a cut tobacco drying device (or procedure) and a flavoring device (or procedure).
In some embodiments, a bulk conditioning apparatus is used to receive raw tobacco and apply liquor and steam to the tobacco;
in some embodiments, the moist feeder device is adapted to receive loose, moisture-regained tobacco and to apply liquor and steam to the tobacco;
in some embodiments, the cut-tobacco drying device is configured to receive the tobacco treated by the leaf moistening device and to subject the tobacco to a curing process;
in some embodiments, the flavoring device is configured to receive tobacco processed by the cut-tobacco drier and apply a flavoring to the tobacco.
In some embodiments, the belt scale comprises a first belt scale disposed before a bulk conditioning device (process) of a tobacco-making line for weighing tobacco raw material to be fed into the bulk conditioning device, the method of evaluating the accuracy of the first belt scale comprising the steps of:
measuring the weight x of the tobacco to be fed into the loosening and conditioning device1；
Calculating the theoretical weight N of the tobacco before the tobacco is weighed on the first electronic belt scale based on the following formula1，
N1=x1；
Comparison of theoretical weight N1The apparent weight M is obtained by weighing the tobacco on a first electronic scale1When N is present1And M1Difference w of1And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
In some embodiments, the belt scale comprises a second belt scale disposed between a bulk conditioning device (process) and a moist leaf feeding device (process) of a tobacco cut-making line for weighing tobacco material to be fed into the moist leaf feeding device, the method of evaluating the accuracy of the second belt scale comprising the steps of:
measuring α the moisture content of tobacco to be fed into the loosening and conditioning apparatus1；
Measuring the weight x of the tobacco to be fed into the loosening and conditioning device1；
Obtaining the weight x of the pine nut slice feed liquid2；
Obtaining dry matter coefficient x of pine slice feed liquid3；
Measuring α moisture content of tobacco to be fed into a moistening feeding device2；
Obtaining an empirical value y of the tobacco consumption of a loosening and conditioning device1；
Calculating the theoretical weight N of the tobacco before the tobacco is weighed on the second electronic belt scale based on the following formula2，
Comparison of theoretical weight N2The apparent weight M obtained by weighing the tobacco and the tobacco on a second belt scale2When N is present2And M2Difference w of2And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
In some embodiments, the tobacco-shredding line further comprises a third belt scale disposed between the tobacco-moistening feeding device (process) and the tobacco-drying device (process) of the tobacco-shredding line for weighing the tobacco material to be fed into the tobacco-drying device, the method of assessing the accuracy of the third belt scale comprising the steps of:
measuring the weight M of tobacco to be fed into a moistening feeding device2(e.g. obtaining apparent weight M of tobacco weighed by a second belt scale2)；
Measuring α moisture content of tobacco to be fed into a moistening feeding device2；
Obtaining the weight x of the leaf moistening feed liquid6；
Obtaining dry matter coefficient x of the leaf moistening feed liquid7；
Measuring α the moisture content of tobacco to be fed into a cut-tobacco drier3；
Obtaining an empirical value y of tobacco consumption of a moistening and feeding device2；
Calculating the theoretical weight N of the tobacco before climbing the third electronic belt scale based on the following formula3，
Comparison of theoretical weight N3With tobacco on a third beltApparent weight M obtained by weighing on scale3When N is present3And M3Difference w of3And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
In some embodiments, the belt scale comprises a fourth belt scale disposed between a cut-tobacco drying device (process) and a flavoring device (process) of a tobacco-making line for weighing a tobacco material to be fed into the flavoring device, the method of evaluating the accuracy of the fourth belt scale comprising the steps of:
measuring the weight M of tobacco to be fed into a cut-tobacco drier3(for example, the apparent weight M obtained by weighing tobacco by a third electronic belt scale is obtained3)；
Measuring α the moisture content of tobacco to be fed into a cut-tobacco drier3；
Measuring α the moisture content of the tobacco to be fed into the flavoring device4；
Obtaining an empirical value y of tobacco consumption of a cut-tobacco drying device3。
Calculating the theoretical weight N before the tobacco is weighed on the fourth electronic belt scale based on the following formula4，
Comparison of theoretical weight N4The apparent weight M obtained by weighing the tobacco and the tobacco on a fourth belt scale4When N is present4And M4Difference w of4And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
In some embodiments, a method of monitoring the accuracy of a belt scale, further comprising,
and when the belt scale is judged to be inaccurate, alarming.
In some aspects, there is provided a belt weigher accuracy evaluation device on a tobacco cut-tobacco manufacturing line, comprising:
the calculation module is used for calculating the theoretical weight N of the tobacco based on the historical procedures before the belt weigher on the tobacco;
and the comparison module is used for comparing the theoretical weight N with the apparent weight M obtained by weighing the tobacco on the belt weigher, and when the difference w between the theoretical weight N and the theoretical weight M exceeds a threshold interval, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
In some embodiments, the tobacco-shredding line comprises a bulk conditioning device, a leaf moistening and feeding device, a cut-tobacco drying device, and a flavoring device;
the loosening and moisture regaining device is used for receiving raw material tobacco and applying feed liquid and steam to the tobacco;
the moistening and feeding device is used for receiving the loose and moisture regained tobacco and applying feed liquid and steam to the tobacco;
the tobacco drying device is used for receiving the tobacco treated by the leaf moistening and feeding device and baking the tobacco;
the flavoring device is used for receiving the tobacco processed by the cut tobacco drying device and applying the flavor to the tobacco.
In some embodiments, the belt scale comprises a first belt scale disposed before a bulk conditioning device of the tobacco-making line for weighing tobacco material to be fed into the bulk conditioning device.
In some embodiments, the belt scale comprises a second belt scale disposed between the bulk conditioning device and the moistening device of the tobacco shred production line for weighing the tobacco raw material to be fed into the moistening device.
In some embodiments, the belt scale comprises a third belt scale disposed between a tobacco moistening and feeding device and a cut-tobacco drying device of the tobacco-making line for weighing tobacco raw material to be fed into the cut-tobacco drying device.
In some embodiments, the belt scale comprises a fourth belt scale disposed between a cut-tobacco drying device and a flavoring device of a tobacco-making line for weighing tobacco raw material to be fed into the flavoring device.
In some embodiments, a first moisture content detection module is disposed between the loosening and conditioning device and the moistening device for detecting the moisture content of tobacco to be fed into the moistening device.
In some embodiments, a second moisture content detection module is disposed between the leaf moistening and feeding device and the cut-tobacco drying device, and is used for detecting the moisture content of tobacco to be fed into the cut-tobacco drying device.
In some embodiments, a third moisture content detection module is disposed between the cut tobacco drying device and the flavoring device, and is used for detecting the moisture content of the tobacco to be fed into the flavoring device.
In some embodiments, the belt scale accuracy assessment device on the tobacco shred production line further comprises,
and the alarm module is used for giving an alarm when the comparison module judges that the belt scale is inaccurate.
In some aspects, there is provided an apparatus for evaluating belt scale accuracy on a tobacco-shredding line, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform a method according to any of the present disclosure based on instructions stored in the memory.
In some aspects, a system for evaluating belt scale accuracy on a tobacco-shredding line is provided, comprising a device of any of the present disclosure.
In some embodiments, the belt scale is an electronic belt scale.
In some embodiments, the method for monitoring the accuracy of the belt weigher on the tobacco shred production line keeps monitoring the belt weigher in the whole production process, and reports the belt weigher in time when abnormality occurs (for example, when the belt weigher is judged to be inaccurate), so that an operator can find the measurement abnormality in time and remove the fault.
In the present invention, unless otherwise specified, scientific and technical terms used herein have the meanings that are commonly understood by those skilled in the art. Also, the laboratory procedures referred to herein are all conventional procedures widely used in the corresponding field. Meanwhile, in order to better understand the present invention, the definitions and explanations of related terms are provided below.
Advantageous effects
The traditional monthly/annual inspection method is poor in real-time performance, measurement abnormity is not easy to find in time, and the calibration method and actual production are different, so that the calibration is accurate, and measurement deviation occurs in actual production.
The method, the device and the system for monitoring the accuracy of the belt weigher on the tobacco shred production line can track the whole process of the belt weigher on the tobacco shred production line and report the abnormal condition in time, so that an operator can find the abnormal measurement in time and remove faults.
The method disclosed by the invention has the advantages of high accuracy and small error in the accuracy evaluation of the belt weigher.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a method for monitoring the accuracy of a belt scale of a tobacco-shredding line;
FIG. 2 is a schematic view of an embodiment of a device for monitoring the accuracy of a belt scale of a tobacco-shredding line;
FIG. 3 is a schematic view of yet another embodiment of an apparatus for monitoring the accuracy of a belt scale of a tobacco-shredding line;
FIG. 4 shows a tobacco shred production line provided with a belt scale for monitoring the accuracy of a belt on the tobacco shred production line;
FIG. 5 illustrates a flow chart of a method of evaluating accuracy of a second belt scale;
FIG. 6 illustrates a flow chart of a method of evaluating the accuracy of a third belt scale;
fig. 7 shows a flow chart of a method of evaluating the accuracy of a fourth belt scale.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
FIG. 1 is a schematic diagram of an embodiment of a method for monitoring the accuracy of a belt scale of a tobacco-shredding line. Alternatively, the method of this embodiment may be performed by a device for monitoring the accuracy of a belt scale of a tobacco-shredding line.
Optionally, one tobacco shred production line comprises a loosening and dampening device, a leaf moistening and feeding device, a tobacco shred drying device and a flavoring device; the loosening and moisture regaining device is used for receiving raw material tobacco and applying feed liquid and steam to the tobacco; the moistening and feeding device is used for receiving the loose and moisture regained tobacco and applying feed liquid and steam to the tobacco; the tobacco drying device is used for receiving the tobacco treated by the leaf moistening and feeding device and baking the tobacco; the flavoring device is used for receiving the tobacco processed by the cut tobacco drying device and applying the flavor to the tobacco.
Optionally, the belt weigher comprises a first belt weigher arranged in front of the loosening and conditioning device of the tobacco shred production line for weighing the tobacco raw material to be fed into the loosening and conditioning device.
Optionally, the belt weigher comprises a second belt weigher, and the second belt weigher is arranged between the loosening and dampening device and the tobacco moistening and feeding device of the tobacco shred production line and is used for weighing the weight of the tobacco raw materials to be fed into the tobacco moistening and feeding device.
Optionally, the tobacco shred production line further comprises a third belt weigher, and the third belt weigher is arranged between the tobacco leaf moistening and feeding device and the tobacco shred drying device of the tobacco shred production line and is used for weighing the weight of the tobacco raw materials to be fed into the tobacco shred drying device.
Optionally, the belt weigher comprises a fourth belt weigher, and the fourth belt weigher is arranged between the cut tobacco drying device and the flavoring device of the tobacco cut tobacco production line and is used for weighing the weight of the tobacco raw materials to be fed into the flavoring device.
In one embodiment, the belt scale comprises a first belt scale disposed before a bulk conditioning device of a tobacco-making line for weighing tobacco raw material to be fed into the bulk conditioning device, and the method of evaluating the accuracy of the first belt scale comprises the steps of:
measuring the weight x of the tobacco to be fed into the loosening and conditioning device1；
Calculating the theoretical weight N of the tobacco before the tobacco is weighed on the first electronic belt scale based on the following formula1，
N1=x1；
Comparison of theoretical weight N1The apparent weight M is obtained by weighing the tobacco on a first electronic scale1When N is present1And M1Difference w of1And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
And 102, comparing the theoretical weight N with the apparent weight M obtained by weighing the tobacco on the belt weigher, judging that the belt weigher is inaccurate when the difference w between the theoretical weight N and the apparent weight M exceeds a threshold interval, and otherwise, judging that the belt weigher is accurate.
Optionally, the empirical value y of tobacco consumption of the bulk conditioning apparatus1The method is obtained by carrying out statistics on material consumption values of loose moisture regaining devices of a plurality of historical batches and averaging.
Optionally, an empirical value y of tobacco consumption of the leaf moistening and feeding device2The tobacco consumption is obtained by calculating the average value of empirical values of tobacco consumption of a plurality of historical batches of the tobacco moistening and feeding device.
Optionally, an empirical value y of tobacco consumption of the cut-tobacco drying apparatus3The tobacco consumption is obtained by calculating the average value of empirical values of tobacco consumption of a plurality of historical batches of cut tobacco drying devices.
Optionally, the method for monitoring the accuracy of the belt weigher of the tobacco shred production line further comprises any one of the following:
-detecting the moisture content of the tobacco to be fed into the moistening device.
-detecting the moisture content of the tobacco to be fed into the cut-tobacco drying device.
-detecting the moisture content of the tobacco to be fed into the flavoring means.
Optionally, fitting a difference w between the theoretical weight N and the apparent weight M of the tobacco weighed on the battery scale by using a normal distribution function, and when w exceeds a threshold interval, determining that the belt scale is inaccurate, otherwise, determining that the belt scale is accurate.
Alternatively, the theoretical weight N is compared1The apparent weight M obtained by weighing the tobacco and the tobacco on a first belt scale1When N is present1And M1Difference w of1And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Alternatively, the theoretical weight N is compared2The apparent weight M obtained by weighing the tobacco and the tobacco on a second belt scale2When N is present2And M2Difference w of2And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Alternatively, the theoretical weight N is compared3The apparent weight M is obtained by weighing the tobacco in a third belt weigher3When N is present3And M3Difference w of3And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Alternatively, the theoretical weight N is compared4The apparent weight M is obtained by weighing the tobacco in a fourth belt weigher4When N is present4And M4Difference w of4And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
FIG. 4 shows a tobacco shred production line with a belt weigher for monitoring the accuracy of the belt weigher on the tobacco shred production line, which comprises an electronic loosening and dampening device, a premixing cabinet, a leaf moistening and feeding device, a leaf storage cabinet, a tobacco cutter, a tobacco dryer, a tobacco mixing cabinet, a flavoring machine and a tobacco storage cabinet which are connected in sequence, wherein the belt weigher 1 is arranged in front of the loosening and dampening device, the belt weigher 2 is arranged between the premixing cabinet and the leaf moistening and feeding device, the belt weigher 3 is arranged between the tobacco cutter and the tobacco dryer, and the belt weigher 4 is arranged between the tobacco mixing cabinet and the flavoring machine.
Optionally, a moisture meter can be arranged between the loosening and dampening device and the premixing cabinet, a moisture meter can be arranged between the premixing cabinet and the leaf moistening and feeding device, a moisture meter can be arranged between the leaf moistening and feeding device and the leaf storage cabinet, a moisture meter can be arranged between the filament cutter and the filament dryer, a moisture meter can be arranged between the filament dryer and the filament mixing cabinet, a moisture meter can be arranged between the filament mixing cabinet and the perfuming machine, and a moisture meter can be arranged between the perfuming machine and the filament storage cabinet.
FIG. 5 illustrates a flow chart of a method of evaluating accuracy of a second belt scale. In one embodiment, the belt scale comprises a second belt scale disposed between a bulk conditioning device and a moist leaf feeding device of a tobacco cut-making line for weighing tobacco raw material to be fed into the moist leaf feeding device, and the method of evaluating the accuracy of the second belt scale comprises the steps of:
step 501 measuring the moisture content α of tobacco to be fed into the loosening and conditioning apparatus1；
Step 502 measures the weight x of tobacco to be fed into the bulk conditioning apparatus1；
Step 503 obtaining weight x of pine nut feed liquid2；
Step 504 obtains dry matter coefficient x of pine piece feed liquid3；
Step 505 measures the moisture content α of tobacco to be fed into the moistening device2；
Step 506 obtains an empirical value y of tobacco consumption of the loosening and conditioning device1；
Step 508 compares the theoretical weight N2The apparent weight M obtained by weighing the tobacco and the tobacco on a second belt scale2When N is present2And M2Difference w of2And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Fig. 6 shows a flow chart of a method of evaluating the accuracy of a third belt scale. In some embodiments, the tobacco-shredding-line further comprises a third belt scale disposed between the leaf-moistening feeding device and the cut-tobacco-drying device of the tobacco-shredding-line for weighing the tobacco raw material to be fed into the cut-tobacco-drying device, the method of evaluating the accuracy of the third belt scale comprising the steps of:
Step 602 measures α the moisture content of tobacco to be fed into a moistening device2；
Step 603 obtains the weight x of the leaf moistening feed liquid6；
Step 604 obtaining dry matter coefficient x of the leaf moistening feed liquid7；
Step 605 measures α the moisture content of tobacco to be fed into the cut tobacco dryer3；
Step 606 obtains an empirical value y of tobacco consumption for a leaf moistening and feeding device2；
Step 607 is carried out to calculate the theoretical weight of the tobacco before it is weighed on the third electronic belt based on the following formula
Quantity N3，
Step 608 compares the theoretical weight N3The apparent weight M obtained by weighing the tobacco and the tobacco on a third belt weigher3When N is present3And M3Difference w of3And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Fig. 7 shows a flow chart of a method of evaluating the accuracy of a third belt scale. In some embodiments, the belt scale comprises a fourth belt scale disposed between a cut-tobacco drying device and a flavoring device of a tobacco-making line for weighing tobacco raw material to be fed into the flavoring device, the method of assessing the accuracy of the fourth belt scale comprising the steps of:
step 701 obtaining apparent weight M obtained by weighing tobacco through a third electronic belt3；
Step 702 measures α the moisture content of tobacco to be fed into a cut-tobacco drying device3；
Step 703 measures the moisture content α of the tobacco to be fed into the flavoring device4；
Step 704 obtains an empirical value y of tobacco consumption of a cut-tobacco drying device3；
Step 705 calculates the theoretical weight N of the tobacco before it is weighed on the fourth electronic belt based on the following formula4，
Step 706 compares the theoretical weight N4The apparent weight M obtained by weighing the tobacco and the tobacco on a fourth belt scale4When N is present4And M4Difference w of4And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Alternatively, the threshold interval is set to [ μ -x σ, μ + y σ ], and x and y are each independently 1, 2, or 3.μ and σ are the expected value and standard deviation, respectively, of the normal distribution function.
Optionally, fitting the theoretical weight N with a normal distribution function1And the tobacco is weighed on a first belt weigher to obtain the apparent weight M1Difference w of1The threshold interval is set to [ mu-3 sigma, [ mu +3 sigma ]]When k is1And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Optionally, fitting the theoretical weight N with a normal distribution function2And the tobacco is weighed on a second belt scale to obtain the apparent weight M2Difference w of2The threshold interval is set to [ mu-3 sigma, [ mu +3 sigma ]]When k is2And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Optionally, fitting the theoretical weight N with a normal distribution function3And the apparent weight M of the tobacco weighed on a third belt weigher3Difference w of3The threshold interval is set to [ mu-3 sigma, [ mu +3 sigma ]]When k is3And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
Optionally, fitting the theoretical weight N with a normal distribution function4And the apparent weight M of the tobacco weighed on a fourth belt scale4Difference w of4The threshold interval is set to [ mu-3 sigma, [ mu +3 sigma ]]When k is4And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
FIG. 2 is a schematic diagram of an embodiment of the device for monitoring the accuracy of the belt weigher of the tobacco shred production line according to the invention. As shown in fig. 2, the device for monitoring the accuracy of the belt weigher of the tobacco shred production line comprises:
a calculating module 201, configured to calculate a theoretical weight N of tobacco based on a historical process before a belt weigher on the tobacco;
and the comparison module 202 is used for comparing the theoretical weight N with the apparent weight M obtained by weighing the tobacco on the belt weigher, judging that the belt weigher is inaccurate when the difference w between the theoretical weight N and the apparent weight M exceeds a threshold interval, and otherwise, judging that the belt weigher is accurate.
Optionally, the comparing module is configured to fit a normal distribution function to a difference w between the theoretical weights N and M (for example, the difference w between multiple N and M obtained by multiple measurements), and when w exceeds a threshold interval, it is determined that the belt scale is inaccurate, otherwise, it is determined that the belt scale is accurate.
Alternatively, the threshold interval is set to [ μ -x σ, μ + y σ ], and x and y are each independently 1, 2, or 3.μ and σ are the expected value and standard deviation, respectively, of the normal distribution function.
FIG. 3 is a schematic view of another embodiment of the device for monitoring the accuracy of the belt weigher of the tobacco shred production line according to the invention. As shown in fig. 3, the monitoring device may include a memory 1001 and a processor 1002. Wherein:
the memory 1001 is used for storing instructions, the processor 1002 is coupled to the memory 1001, and the processor 1002 is configured to execute the method according to any embodiment in fig. 1 based on the instructions stored in the memory 1001.
In addition, the monitoring device also includes a communication interface 1003 for information interaction with other devices. Meanwhile, the device also comprises a bus 1004, and the processor 1002, the communication interface 1003 and the memory 1001 are communicated with each other through the bus 1004.
The memory 1001 in fig. 3 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 1001 may also be a memory array. The storage 1001 may also be partitioned and the blocks may be combined into virtual volumes according to certain rules.
Further, the processor 1002 of FIG. 3 may be a central processing unit CPU, or may be an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
While specific embodiments of the invention have been described in detail, those skilled in the art will understand that: various modifications and changes in detail can be made in light of the overall teachings of the disclosure, and such changes are intended to be within the scope of the present invention. The full scope of the invention is given by the appended claims and any equivalents thereof.
Claims (10)
1. A method for monitoring the accuracy of a belt scale on a tobacco shredding line, comprising the steps of:
(1) calculating the theoretical weight N of the tobacco based on the historical process before the tobacco is put on a belt weigher;
(2) comparing the theoretical weight N with the apparent weight M obtained by weighing the tobacco on the belt weigher, judging that the belt weigher is inaccurate when the difference w between the theoretical weight N and the apparent weight M exceeds a threshold interval, and otherwise, judging that the belt weigher is accurate;
which has one or more of the following characteristics (i) to (iii):
(i) the belt weigher comprises a second belt weigher, the second belt weigher is arranged between a loosening and dampening device and a tobacco moistening and feeding device of a tobacco shred production line and used for weighing the weight of tobacco raw materials to be fed into the tobacco moistening and feeding device, and the method for evaluating the accuracy of the second belt weigher comprises the following steps:
measuring α the moisture content of tobacco to be fed into the loosening and conditioning apparatus1；
Measuring the weight x of the tobacco to be fed into the loosening and conditioning device1；
Obtaining the weight x of the pine nut slice feed liquid2；
Obtaining dry matter coefficient x of pine slice feed liquid3；
Measuring α moisture content of tobacco to be fed into a moistening feeding device2；
Obtaining an empirical value y of the tobacco consumption of a loosening and conditioning device1；
Calculating the theoretical weight N of the tobacco before the tobacco is weighed on the second electronic belt scale based on the following formula2，
Comparison of theoretical weight N2The apparent weight M obtained by weighing the tobacco and the tobacco on a second belt scale2When N is present2And M2Difference w of2When the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate;
(ii) the belt weigher comprises a third belt weigher which is arranged between a tobacco moistening and feeding device and a tobacco drying device of a tobacco cut-tobacco production line and used for weighing the weight of tobacco raw materials to be fed into the tobacco drying device, and the method for evaluating the accuracy of the third belt weigher comprises the following steps:
measuring the weight M of tobacco to be fed into a moistening feeding device2；
Measuring α moisture content of tobacco to be fed into a moistening feeding device2；
Obtaining the weight x of the leaf moistening feed liquid6；
Obtaining dry matter coefficient x of the leaf moistening feed liquid7；
Measuring α the moisture content of tobacco to be fed into a cut-tobacco drier3；
Obtaining an empirical value y of tobacco consumption of a moistening and feeding device2；
Calculating the theoretical weight N of the tobacco before climbing the third electronic belt scale based on the following formula3，
Comparison of theoretical weight N3The apparent weight M obtained by weighing the tobacco and the tobacco on a third belt weigher3When N is present3And M3Difference w of3When the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate;
(iii) the belt weigher comprises a fourth belt weigher which is arranged between a cut tobacco drying device and an flavoring device of a tobacco cut tobacco production line and used for weighing the weight of tobacco raw materials to be fed into the flavoring device, and the method for evaluating the accuracy of the fourth belt weigher comprises the following steps:
measuring the weight M of tobacco to be fed into a cut-tobacco drier3；
Measuring α the moisture content of tobacco to be fed into a cut-tobacco drier3；
Measuring α the moisture content of the tobacco to be fed into the flavoring device4；
Obtaining an empirical value y of tobacco consumption of a cut-tobacco drying device3；
Calculating the theoretical weight N before the tobacco is weighed on the fourth electronic belt scale based on the following formula4，
Comparison of theoretical weight N4The apparent weight M obtained by weighing the tobacco and the tobacco on a fourth belt scale4When N is present4And M4Difference w of4And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
2. The method of claim 1, wherein the theoretical weight N of the k-th processed tobacco on the tobacco-shredding line is calculated based on the following formulak，
αkIs the moisture content of the tobacco after the k time of treatment.
3. The method of claim 2, wherein the kth processed tobacco dry weight is calculated based on the following formula:
dry weight of tobacco after k-th treatment (1- α)k-1)Mk-1+Pk-Qk；
αk-1Is the moisture content of the tobacco before the kth treatment;
Mk-1of tobacco before the kth treatmentWeight;
Pkis the dry weight of add-on material applied to the tobacco in the kth treatment;
Qkis an empirical value of tobacco consumption in the k-th treatment.
4. The method of claim 3, further comprising the steps of:
measurement of moisture content α of kth processed tobaccok；
Measurement of moisture content α of tobacco before kth treatmentk-1；
Measuring the weight M of the tobacco before the kth treatmentk-1；
Obtaining the dry weight P of the additional material applied to the tobacco in the k-th treatmentk；
Obtaining an empirical value Q of tobacco consumption in the kth treatmentk。
5. The method of claim 1, wherein a normal distribution function is used to fit the difference w between the theoretical weights N and M, and when w exceeds a threshold interval, the belt scale is determined to be inaccurate, otherwise, the belt scale is determined to be accurate.
6. The method of claim 5, wherein the threshold interval is set to [ μ -x σ, μ + y σ ], μ and σ are the expected value and standard deviation, respectively, of the normal distribution function, and x and y are both natural numbers.
7. The method of claim 1, the tobacco-shredding line comprising: a loosening and dampening device, a leaf moistening and feeding device, a cut tobacco drying device and a flavoring device, wherein,
the loosening and moisture regaining device is used for receiving raw material tobacco and applying feed liquid and steam to the tobacco;
the moistening and feeding device is used for receiving the loose and moisture regained tobacco and applying feed liquid and steam to the tobacco;
the tobacco drying device is used for receiving the tobacco treated by the leaf moistening and feeding device and baking the tobacco;
the flavoring device is used for receiving the tobacco processed by the cut tobacco drying device and applying the flavor to the tobacco.
8. The method of claim 1, the belt scale comprising a first belt scale disposed before a bulk conditioning device of a tobacco-making line for weighing tobacco material to be fed into the bulk conditioning device, the method of evaluating the accuracy of the first belt scale comprising the steps of:
measuring the weight x of the tobacco to be fed into the loosening and conditioning device1；
Calculating the theoretical weight N of the tobacco before the tobacco is weighed on the first electronic belt scale based on the following formula1，
N1＝x1；
Comparison of theoretical weight N1The apparent weight M is obtained by weighing the tobacco on a first electronic scale1When N is present1And M1Difference w of1And when the threshold interval is exceeded, the belt weigher is judged to be inaccurate, otherwise, the belt weigher is judged to be accurate.
9. An apparatus for evaluating the accuracy of a belt scale on a tobacco-shredding line, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-8 based on instructions stored in the memory.
10. A system for assessing the accuracy of a belt scale on a tobacco-shredding line, comprising the apparatus of claim 9.
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| CN111375549B (en) * | 2018-12-28 | 2022-05-03 | 贵州中烟工业有限责任公司 | Tobacco winnowing equipment and secondary winnowing flow measuring method, device and equipment thereof |
| CN110455393B (en) * | 2019-09-02 | 2021-05-04 | 国家能源集团谏壁发电厂 | High-accuracy real-time monitoring method for electronic belt scale |
| CN112785023B (en) * | 2019-11-07 | 2024-01-12 | 北京京东振世信息技术有限公司 | Method and device for measuring weight of article, electronic equipment and storage medium |
| CN112021641B (en) * | 2020-07-10 | 2022-04-29 | 张家口卷烟厂有限责任公司 | On-line moisture meter calibration system for tobacco shred making link |
| CN112082635A (en) * | 2020-10-10 | 2020-12-15 | 江西中烟工业有限责任公司 | State monitoring and fault judging method for electronic belt scale |
| CN115096420B (en) * | 2022-06-28 | 2023-03-28 | 中国地质大学（武汉） | Belt scale checking method and system |
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