Automatic online monitoring method for metering of tobacco shred control type electronic belt scale

Abstract

The invention discloses an automatic online monitoring method for metering of a tobacco shred control type electronic belt scale. The automatic online monitoring method comprises the following steps: establishing a real-time cumulative weight mathematical model, a real-time theoretical cumulative weight mathematical model and a real-time metering precision mathematical model of the electronic belt scale; recording the real-time material weight P of each batch of the electronic belt scale, the speed V of the electronic belt scale, the peripheral flow QP and the production time t of starting metering and ending metering of each batch; and calculating according to the real-time measurement precision mathematical model to obtain the real-time measurement precision # imgabs0 # of the electronic belt scale, and when the real-time measurement precision # imgabs1 # is greater than 0.5%, popping up alarm information on an operation desktop to prompt an operator to judge whether manual verification is needed or not. The metering precision of the control type electronic belt scale can be improved, and the process quality and the production efficiency of tobacco shred production are improved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic belt scale measurement accuracy monitoring, and more specifically, to an automatic online monitoring method for tobacco-controlled electronic belt scale measurement. Background Art

[0002] In the tobacco shred production line, as a key equipment of the constant flow control system, the control type electronic belt scale is widely used in the key shred production process, such as the control of flavoring and feeding equipment, the water addition control of the heating and humidification equipment, and the dehydration control of the drying equipment. The metering accuracy of the control type electronic belt scale directly affects the control accuracy of the equipment's flavoring, feeding, water addition, temperature, etc., and further affects the quality of the shredded tobacco in the process. At present, it takes about 2 hours to produce a batch of 10,000 kg, and it takes about 6 hours for some processes to use 3 batches of production. If the metering accuracy error of the control type electronic belt scale of each key process cannot be discovered or corrected in time, it may cause a single batch or multiple batches of products to be unqualified, or even cause quality accidents. Therefore, how to monitor and verify the metering accuracy of the control type electronic belt scale of shredded tobacco online is of great significance. Summary of the invention

[0003] The present invention provides an automatic online monitoring method for the measurement of a controlled electronic belt scale for cut tobacco, which solves the problem that the measurement accuracy errors of the controlled electronic belt scales in each key process cannot be discovered or verified and corrected in time, which may cause a single batch or multiple batches of products to be unqualified, or even cause quality accidents. The method can improve the measurement accuracy of the controlled electronic belt scales, and improve the process quality and production efficiency of cut tobacco production.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] An automatic online monitoring method for tobacco-controlled electronic belt scale measurement, comprising:

[0006] Establish the real-time cumulative weight mathematical model, real-time theoretical cumulative weight mathematical model and real-time measurement accuracy mathematical model of the electronic belt scale;

[0007] Record the real-time material weight P, speed V, and peripheral flow Q of each batch of electronic belt scales P and the production time t of the start and end of metering for each batch;

[0008] The real-time measurement accuracy of the electronic belt scale is calculated according to the real-time measurement accuracy mathematical model. , when the real-time measurement accuracy When it is greater than 5‰, an alarm message will pop up on the operation desktop to prompt the operator to determine whether manual verification is required.

[0009] Preferably, it also includes:

[0010] When manual verification is performed, the real-time cumulative weight and theoretical cumulative weight data for 1 minute are automatically captured and recorded in a data storage device, and the cumulative weight coefficient is corrected and adjusted according to a preset cumulative weight coefficient correction mathematical model.

[0011] Preferably, it also includes:

[0012] The real-time cumulative weight corresponding to each batch is calculated according to the real-time cumulative weight mathematical model;

[0013] The real-time theoretical cumulative weight corresponding to the first batch is calculated according to the real-time theoretical cumulative weight mathematical model.

[0014] Preferably, it also includes:

[0015] According to the ratio of the real-time cumulative weight and the theoretical cumulative weight corresponding to each batch, calculate the ratio R of the real-time cumulative weight and the theoretical cumulative weight corresponding to 100 batches b , and stored in the PLC internal data storage of the control type electronic belt scale.

[0016] Preferably, the real-time cumulative weight mathematical model is: ∑ i =K*P*V*t*3600, where i is the batch number, ∑ is the real-time cumulative weight, and K is the cumulative weight coefficient.

[0017] Preferably, the real-time theoretical cumulative weight mathematical model is: ∑0=Q P *t*R b / 3600, where ∑0 is the real-time theoretical cumulative weight, R b It is the ratio of the real-time cumulative weight of 100 batches to the theoretical cumulative weight.

[0018] Preferably, the real-time metering accuracy mathematical model is: =((∑ i -∑0) / ∑0)*1000.

[0019] Preferably, the determining whether manual verification is required includes:

[0020] If │If the value changes gradually, manual verification is required.

[0021] Preferably, it also includes:

[0022] After the cumulative weight factor is corrected, observe again Check whether the value change has a stable or decreasing trend. If not, perform a second manual calibration and correction. The interval between each calibration must be greater than 10 minutes.

[0023] Preferably, it also includes:

[0024] If after three manual checks │ │The value does not tend to stabilize or decrease, and│ │>10‰, the machine must be shut down immediately for inspection and troubleshooting, and manual calibration must be performed.

[0025] The present invention provides an automatic online monitoring method for the measurement of tobacco-controlled electronic belt scales, which establishes a real-time cumulative weight mathematical model of the electronic belt scale, a real-time theoretical cumulative weight mathematical model and a real-time measurement accuracy mathematical model to calculate the real-time measurement accuracy of the electronic belt scale. , and judge whether manual calibration is needed based on the real-time measurement accuracy. This can solve the problem that the measurement accuracy errors of the controlled electronic belt scales in each key process cannot be discovered or corrected in time, which may cause single batches or multiple batches of products to be unqualified, or even cause quality accidents. It can improve the measurement accuracy of the controlled electronic belt scales and improve the process quality and production efficiency of tobacco production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0027] Figure 1 It is a schematic diagram of an automatic online monitoring method for tobacco-controlled electronic belt scale measurement provided by the present invention. DETAILED DESCRIPTION

[0028] In order to enable persons skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0029] In view of the problem that the current measurement accuracy errors of controlled electronic belt scales cannot be discovered or verified and corrected in time, the present invention provides an automatic online monitoring method for the measurement of controlled electronic belt scales for cut tobacco, which solves the problem that the measurement accuracy errors of controlled electronic belt scales for key processes cannot be discovered or verified and corrected in time, which may cause single batches or multiple batches of products to be unqualified, and even cause quality accidents. The measurement accuracy of controlled electronic belt scales can be improved, and the process quality and production efficiency of cut tobacco production can be improved.

[0030] like Figure 1 As shown, an automatic online monitoring method for tobacco-controlled electronic belt scale measurement includes:

[0031] S1: Establish the real-time cumulative weight mathematical model, real-time theoretical cumulative weight mathematical model and real-time measurement accuracy mathematical model of the electronic belt scale.

[0032] S2: Record the real-time material weight P, speed V, and peripheral flow Q of each batch of electronic belt scales P And the start and end measurement production time t for each batch.

[0033] S3: Calculate the real-time measurement accuracy of the electronic belt scale according to the real-time measurement accuracy mathematical model , when the real-time measurement accuracy When it is greater than 5‰, an alarm message will pop up on the operation desktop to prompt the operator to determine whether manual verification is required.

[0034] Specifically, the time relay T is taken in the PLC program of the control type electronic belt scale, and the production time t from the start to the end of each batch of the electronic belt scale is recorded to establish the real-time cumulative weight ∑ i , real-time theoretical cumulative weight∑0, real-time measurement accuracy etc. mathematical model, and put ∑ i ,∑0, The value is uploaded to the IFIX operation desktop for real-time monitoring. When the control type electronic belt scale real-time measurement accuracy │ │>5‰, an alarm message pops up on the IFIX operation desktop, and the operator observes│ │Whether the value change has an increasing trend, if so, manual verification is required. This method can improve the measurement accuracy of the controlled electronic belt scale and improve the process quality and production efficiency of tobacco production.

[0035] The method also includes: when performing manual verification, automatically intercepting 1 minute of real-time cumulative weight and theoretical cumulative weight data and recording them in a data storage device, and performing cumulative weight coefficient correction adjustment according to a preset cumulative weight coefficient correction mathematical model.

[0036] The method also includes: calculating the real-time cumulative weight corresponding to each batch according to the real-time cumulative weight mathematical model; and calculating the real-time theoretical cumulative weight corresponding to the first batch according to the real-time theoretical cumulative weight mathematical model.

[0037] The method further comprises: calculating the ratio R of the real-time cumulative weight corresponding to 100 batches to the theoretical cumulative weight according to the ratio of the real-time cumulative weight corresponding to each batch to the theoretical cumulative weight. b , and stored in the PLC internal data storage of the control type electronic belt scale.

[0038] In practical applications, the measurement accuracy of the control type electronic belt scale │ │≤5‰ and the material flow rate variation coefficient meets the process requirements. Take 100 batches of products and record the real-time cumulative weight ∑ and peripheral flow Q of the electronic belt scale for each batch. PAnd the time t used to produce the batch, calculate the real-time cumulative weight and theoretical cumulative weight of each batch (external flow Q p * The time t taken to produce the batch) ratio, and take the average value to calculate the ratio R of the real-time cumulative weight of 100 batches to the theoretical cumulative weight b And store and control the electronic belt scale PLC internal data storage M200.1.

[0039] Due to R b1 =∑1 / (Q P *t1)……R b100 =∑100 / (Q P *t 100 ) Then R b =(R b1 + R b2 +……R b100 ) / 100;∑1……∑ 100 It is the real-time accumulated weight of each batch from 1 to 100. 100 It is the production time from the start to the end of each batch of 1-100, Q P Controlled electronic belt scale process requires external flow rate (unchanged); R b1 ……R b100 It is the ratio of the real-time cumulative weight of each batch to the theoretical cumulative weight from 1 to 100; R b The ratio of the real-time cumulative weight of 100 batches to the theoretical cumulative weight.

[0040] Furthermore, the real-time cumulative weight mathematical model is: ∑ i =K*P*V*t*3600, where i is the batch number, ∑ is the real-time cumulative weight, and K is the cumulative weight coefficient.

[0041] Furthermore, the real-time theoretical cumulative weight mathematical model is: ∑0=Q P *t*R b / 3600, where ∑0 is the real-time theoretical cumulative weight, R b It is the ratio of the real-time cumulative weight of 100 batches to the theoretical cumulative weight.

[0042] Furthermore, the real-time measurement accuracy mathematical model is: =((∑ i -∑0) / ∑0)*1000.

[0043] Further, the determination of whether manual verification is required includes: if | │If the value changes gradually, manual verification is required.

[0044] The method further comprises: after the cumulative weight coefficient is corrected, observing again Check whether the value change has a stable or decreasing trend. If not, perform a second manual calibration and correction. The interval between each calibration must be greater than 10 minutes.

[0045] The method also includes: if after three manual checks | │The value does not tend to stabilize or decrease, and│ │>10‰, the machine must be shut down immediately for inspection and troubleshooting, and manual calibration must be performed.

[0046] It can be seen that the present invention provides an automatic online monitoring method for the measurement of tobacco-controlled electronic belt scales, by establishing a real-time cumulative weight mathematical model of the electronic belt scale, a real-time theoretical cumulative weight mathematical model and a real-time measurement accuracy mathematical model to calculate the real-time measurement accuracy of the electronic belt scale. , and judge whether manual calibration is needed based on the real-time measurement accuracy. This can solve the problem that the measurement accuracy errors of the controlled electronic belt scales in each key process cannot be discovered or corrected in time, which may cause single batches or multiple batches of products to be unqualified, or even cause quality accidents. It can improve the measurement accuracy of the controlled electronic belt scales and improve the process quality and production efficiency of tobacco production.

[0047] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. An automatic online monitoring method for tobacco-controlled electronic belt scale measurement, characterized in that: include: Establish the real-time cumulative weight mathematical model, real-time theoretical cumulative weight mathematical model and real-time measurement accuracy mathematical model of the electronic belt scale; Record the real-time material weight P, electronic belt scale speed V, and peripheral flow Q of each batch of electronic belt scales P and the production time t of the start and end of metering for each batch; The real-time measurement accuracy of the electronic belt scale is calculated according to the real-time measurement accuracy mathematical model. , when the real-time measurement accuracy When it is greater than 5‰, an alarm message will pop up on the operation desktop to prompt the operator to determine whether manual verification is required.

2. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 1 is characterized in that: Also includes: When manual verification is performed, the real-time cumulative weight and theoretical cumulative weight data for 1 minute are automatically captured and recorded in a data storage device, and the cumulative weight coefficient is corrected and adjusted according to a preset cumulative weight coefficient correction mathematical model.

3. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 2 is characterized in that: Also includes: The real-time cumulative weight corresponding to each batch is calculated according to the real-time cumulative weight mathematical model; The real-time theoretical cumulative weight corresponding to the first batch is calculated according to the real-time theoretical cumulative weight mathematical model.

4. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 3 is characterized in that: Also includes: According to the ratio of the real-time cumulative weight and the theoretical cumulative weight corresponding to each batch, calculate the ratio R of the real-time cumulative weight and the theoretical cumulative weight corresponding to 100 batches b , and stored in the PLC internal data storage of the control type electronic belt scale.

5. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 4 is characterized in that: The real-time cumulative weight mathematical model is: i =K*P*V*t*3600, where i is the batch number, ∑ is the real-time cumulative weight, and K is the cumulative weight coefficient.

6. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 5 is characterized in that: The real-time theoretical cumulative weight mathematical model is: ∑0=Q P *t*R b / 3600, where ∑0 is the real-time theoretical cumulative weight, R b It is the ratio of the real-time cumulative weight of 100 batches to the theoretical cumulative weight.

7. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 6 is characterized in that: The real-time measurement accuracy mathematical model is: =((∑ i -∑0) / ∑0)*1000.

8. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 7 is characterized in that: The determining whether manual verification is required includes: If │If the value changes gradually, manual verification is required.

9. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 8, characterized in that: Also includes: After the cumulative weight factor is corrected, observe again Check whether the value change has a stable or decreasing trend. If not, perform a second manual calibration and correction. The interval between each calibration must be greater than 10 minutes.

10. The automatic online monitoring method for tobacco-controlled electronic belt scale measurement according to claim 9, characterized in that: Also includes: If after three manual checks │ │The value does not tend to stabilize or decrease, and│ │>10‰, the machine must be shut down immediately for inspection and troubleshooting, and manual calibration must be performed.

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