阅读说明：本技术 自动调整烟草薄片厚度的控制方法 (Control method for automatically adjusting thickness of tobacco sheet ) 是由 李世杰 尹献忠 郝辉 张展 陈泽少 赵阔 聂长武 牛亚鹏 朱琦 郑峰洋 罗灿选 于 2021-01-18 设计创作，主要内容包括：本发明公开了一种自动调整烟草薄片厚度的控制方法,其包括：对烟草薄片辊压前的厚度进行检测,得到辊压前厚度；根据辊压前厚度得到超前执行量,以使执行机构基于超前执行量对同步辊压轮施加作用力；在执行机构的作用下,利用同步辊压轮对烟草薄片进行辊压；根据烟草薄片的辊压后厚度与预设辊压厚度的偏差对烟草薄片的厚度进行反馈调节。本发明的自动调整烟草薄片厚度的控制方法,根据前测量值超前调节执行机构的执行力度,并根据测量值与给定值的偏差进行反馈控制,以使得烟草薄片的厚度趋于稳定的状态,可以提高烟草薄片厚度的均匀性,实现烟草薄片成型厚度一致；同时,可以实现烟草薄片的厚度可测可控性,增强生产过程的把控能力。(The invention discloses a control method for automatically adjusting the thickness of a tobacco sheet, which comprises the following steps: detecting the thickness of the tobacco sheet before rolling to obtain the thickness of the tobacco sheet before rolling; obtaining an advanced execution amount according to the thickness before rolling so that the execution mechanism applies acting force to the synchronous rolling wheel based on the advanced execution amount; under the action of an actuating mechanism, rolling the tobacco sheets by utilizing a synchronous rolling wheel; and performing feedback adjustment on the thickness of the tobacco sheet according to the deviation of the rolled thickness of the tobacco sheet and the preset rolled thickness. According to the control method for automatically adjusting the thickness of the tobacco sheets, the execution force of the execution mechanism is adjusted in advance according to the measured value, and feedback control is performed according to the deviation between the measured value and the set value, so that the thickness of the tobacco sheets tends to be in a stable state, the uniformity of the thickness of the tobacco sheets can be improved, and the forming thickness of the tobacco sheets is consistent; meanwhile, the thickness of the tobacco sheet can be measured and controlled, and the control capability in the production process is enhanced.)

1. A control method for automatically adjusting the thickness of a tobacco sheet is characterized by comprising the following steps:

detecting the thickness of the tobacco sheet before rolling to obtain the thickness of the tobacco sheet before rolling;

obtaining an advanced execution amount according to the thickness before rolling so that an actuating mechanism applies acting force to the synchronous rolling wheel based on the advanced execution amount;

under the action of the actuating mechanism, rolling the tobacco sheets by utilizing the synchronous rolling wheel;

and performing feedback adjustment on the thickness of the tobacco sheet according to the deviation of the rolled thickness of the tobacco sheet and the preset rolled thickness.

2. The method for controlling automatic adjustment of the thickness of a tobacco sheet according to claim 1, wherein the detecting the thickness of the tobacco sheet before rolling to obtain the thickness before rolling specifically comprises:

and utilizing a first thickness online detection sensor arranged behind the synchronous rolling wheel to perform online detection on the thickness of the tobacco sheets before rolling so as to obtain the thickness before rolling.

3. The method as claimed in claim 2, wherein the step of obtaining the advanced execution amount according to the thickness before rolling so that the actuator applies the acting force to the synchronous rolling wheel based on the advanced execution amount comprises:

inputting the thickness before rolling into a controller;

the controller outputs a lead execution amount;

and applying acting force corresponding to the advance execution amount to the synchronous roller wheel by using the executing mechanism.

4. The method according to claim 3, wherein the feedback adjustment of the thickness of the tobacco sheet according to the deviation between the rolled thickness of the tobacco sheet and a preset rolled thickness specifically comprises:

detecting the rolled thickness of the tobacco sheet to obtain the rolled thickness;

calculating the deviation value of the rolled thickness and the preset rolled thickness;

and utilizing the controller to perform feedback regulation on the thickness of the tobacco sheet according to the deviation.

5. The method as claimed in claim 4, wherein the step of detecting the rolled thickness of the tobacco sheet to obtain the rolled thickness comprises:

and utilizing a second thickness online detection sensor arranged in front of the synchronous rolling wheel to perform online detection on the rolled thickness passing through the synchronous rolling wheel so as to obtain the rolled thickness.

6. The control method for automatically adjusting the thickness of a tobacco sheet according to claim 5, wherein the first thickness on-line detection sensor and/or the second thickness on-line detection sensor comprises a laser thickness gauge.

7. The method according to claim 4, wherein the feedback adjustment of the thickness of the tobacco sheet according to the deviation by the controller specifically comprises:

inputting the deviation amount to the controller;

the controller outputs a feedback adjustment quantity;

and performing feedback adjustment on the synchronous rolling wheel by using the actuating mechanism based on the feedback adjustment quantity.

8. The control method for automatically adjusting the thickness of a tobacco sheet according to claim 7, wherein the controller comprises a programmable logic controller.

9. The control method for automatically adjusting the thickness of the tobacco sheets according to claim 7, wherein the feedback adjustment of the synchronous rolling wheel by the actuator based on the feedback adjustment amount specifically comprises:

when the rolled thickness is larger than the preset rolled thickness value, reducing the execution amount of the execution mechanism to reduce the pushing distance of the execution mechanism so as to reduce the acting force applied by the execution mechanism;

and when the rolled thickness is smaller than the preset rolling thickness value, increasing the execution amount of the execution mechanism to increase the pushing distance of the execution mechanism so as to increase the acting force applied by the execution mechanism.

10. The control method for automatically adjusting the thickness of a tobacco sheet according to claim 7, further comprising:

and setting the rolling thickness control quantity of the tobacco sheets by using a human-machine operation interface connected with the controller, and displaying the thickness measurement information of the tobacco sheets.

Technical Field

The invention relates to the technical field of automatic test control, in particular to a control method for automatically adjusting the thickness of a tobacco sheet.

Background

At present, the forming method of the tobacco sheet mainly comprises a paper making method, a rolling method and the like, wherein the rolling method is applied more generally, and the internal prestress of the tobacco sheet can be released in a short time after the tobacco sheet is formed by rolling due to the internal prestress of the tobacco sheet, and the thickness of the tobacco sheet presents the conditions of internal expansion and different thicknesses in a short time after the tobacco sheet is formed, so that the quality of the product is influenced to a certain degree.

Therefore, a control method for automatically adjusting the thickness of the tobacco sheet is needed.

Disclosure of Invention

The invention aims to provide a control method for automatically adjusting the thickness of a tobacco sheet, which is used for solving the problems in the prior art, breaking through the limitations of uneven thickness, poor quality and the like of the tobacco sheet in the conventional tobacco sheet rolling method and improving the uniformity and product quality of the tobacco sheet manufacture.

The invention provides a control method for automatically adjusting the thickness of a tobacco sheet, which comprises the following steps:

detecting the thickness of the tobacco sheet before rolling to obtain the thickness of the tobacco sheet before rolling;

obtaining an advanced execution amount according to the thickness before rolling so that an actuating mechanism applies acting force to the synchronous rolling wheel based on the advanced execution amount;

under the action of the actuating mechanism, rolling the tobacco sheets by utilizing the synchronous rolling wheel;

and performing feedback adjustment on the thickness of the tobacco sheet according to the deviation of the rolled thickness of the tobacco sheet and the preset rolled thickness.

The control method for automatically adjusting the thickness of the tobacco sheet as described above, wherein preferably, the detecting the thickness of the tobacco sheet before rolling to obtain the thickness before rolling includes:

and utilizing a first thickness online detection sensor arranged behind the synchronous rolling wheel to perform online detection on the thickness of the tobacco sheets before rolling so as to obtain the thickness before rolling.

The method for controlling the thickness of the tobacco sheet to be automatically adjusted as described above, wherein preferably, the obtaining of the advanced execution amount according to the thickness before rolling so that the actuator applies the acting force to the synchronous rolling wheel based on the advanced execution amount includes:

inputting the thickness before rolling into a controller;

the controller outputs a lead execution amount;

and applying acting force corresponding to the advance execution amount to the synchronous roller wheel by using the executing mechanism.

The method for controlling the thickness of the tobacco sheet to be automatically adjusted as described above, wherein preferably, the feedback adjustment of the thickness of the tobacco sheet according to the deviation between the rolled thickness of the tobacco sheet and a preset rolled thickness specifically includes:

detecting the rolled thickness of the tobacco sheet to obtain the rolled thickness;

calculating the deviation value of the rolled thickness and the preset rolled thickness;

and utilizing the controller to perform feedback regulation on the thickness of the tobacco sheet according to the deviation.

The method for controlling the thickness of the tobacco sheet to be automatically adjusted as described above, wherein preferably, the detecting the rolled thickness of the tobacco sheet to obtain the rolled thickness specifically includes:

and utilizing a second thickness online detection sensor arranged in front of the synchronous rolling wheel to perform online detection on the rolled thickness passing through the synchronous rolling wheel so as to obtain the rolled thickness.

The control method for automatically adjusting the thickness of the tobacco sheet as described above, wherein preferably, the first online thickness detection sensor and/or the second online thickness detection sensor includes a laser thickness gauge.

The method for controlling the thickness of the tobacco sheet to be automatically adjusted as described above, wherein the feedback adjustment of the thickness of the tobacco sheet by the controller according to the deviation amount preferably includes:

inputting the deviation amount to the controller;

the controller outputs a feedback adjustment quantity;

and performing feedback adjustment on the synchronous rolling wheel by using the actuating mechanism based on the feedback adjustment quantity.

The control method for automatically adjusting the thickness of the tobacco sheet as described above, wherein preferably, the controller includes a programmable logic controller.

The control method for automatically adjusting the thickness of the tobacco sheet as described above, wherein the feedback adjustment of the synchronous roller by the actuator based on the feedback adjustment amount preferably includes:

when the rolled thickness is larger than the preset rolled thickness value, reducing the execution amount of the execution mechanism to increase the pushing distance of the execution mechanism so as to reduce the acting force applied by the execution mechanism;

and when the rolled thickness is smaller than the preset rolling thickness value, increasing the execution amount of the execution mechanism to reduce the pushing distance of the execution mechanism, so as to increase the acting force applied by the execution mechanism.

The control method for automatically adjusting the thickness of the tobacco sheet as described above, wherein preferably, the control method for automatically adjusting the thickness of the tobacco sheet further comprises:

and setting the rolling thickness control quantity of the tobacco sheets by using a human-machine operation interface connected with the controller, and displaying the thickness measurement information of the tobacco sheets.

The invention provides a control method for automatically adjusting the thickness of a tobacco sheet, which is characterized in that the execution force of an execution mechanism is adjusted in advance according to a previous measured value, and feedback control is carried out according to the deviation of the measured value and a given value, so that the thickness of the tobacco sheet tends to be in a stable state, the uniformity of the thickness of the tobacco sheet can be improved, and the forming thickness of the tobacco sheet is consistent; meanwhile, the thickness of the tobacco sheet can be measured and controlled, and the control capability in the production process is enhanced.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:

FIG. 1 is a flow chart of an embodiment of a control method for automatically adjusting the thickness of a tobacco sheet according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the control system for automatically adjusting the thickness of the tobacco sheet provided by the present invention.

Description of reference numerals:

1-synchronous rolling wheel 2-actuating mechanism 3-controller

4-tobacco sheet 5-first thickness on-line detection sensor

6-second thickness on-line detection sensor 7-man-machine operation interface

8-conveyor belt

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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.

As shown in fig. 1, an embodiment of the present invention provides a control method for automatically adjusting the thickness of a tobacco sheet, where the method is implemented based on a control system for automatically adjusting the thickness of a tobacco sheet, as shown in fig. 2, the control system for automatically adjusting the thickness of a tobacco sheet includes a synchronous roller 1, a thickness detection component, an actuator 2 and a controller 3, where the synchronous roller 1 is disposed above a tobacco sheet 4, the actuator 2 is connected to the synchronous roller 1, and the controller 3 is respectively connected to the thickness detection component and the actuator 2, where the thickness detection component is configured to detect the thickness of the tobacco sheet 4 before rolling and the thickness of the tobacco sheet after rolling by the synchronous roller 1; the actuating mechanism 2 is used for applying adjustable acting force to the synchronous rolling wheel 1; the controller 3 is configured to perform feed-forward-feedback control according to the pre-rolling thickness and the post-rolling thickness to control the rolled thickness of the tobacco sheet 4.

As shown in fig. 1, the control method for automatically adjusting the thickness of a tobacco sheet provided in this embodiment specifically includes the following steps in an actual implementation process:

and step S1, detecting the thickness of the tobacco sheet 4 before rolling to obtain the thickness before rolling.

Wherein the tobacco sheet 4 is conveyed by a conveyor belt 8, and the moving speed of the conveyor belt 8 is consistent with the rotating speed of the synchronous rolling wheel 1. Specifically, the thickness of the tobacco sheet 4 before rolling can be detected on line by using a first thickness online detection sensor 5 arranged behind the synchronous rolling wheel 1, so as to obtain the thickness before rolling. It should be noted that the rear of the synchronous rollers 2 in the present invention is rearward in the direction opposite to the moving direction of the tobacco sheet 4 with respect to the moving direction of the tobacco sheet 4.

And step 2, obtaining a lead execution amount according to the thickness before rolling so that the actuating mechanism 2 applies acting force to the synchronous rolling wheel 1 based on the lead execution amount.

In an embodiment of the control method for automatically adjusting the thickness of the tobacco sheet according to the present invention, the step S2 may specifically include:

and step S21, inputting the thickness before rolling into the controller 3.

In step S22, the controller 3 outputs an advance execution amount.

Step S23 is to apply an urging force corresponding to the lead execution amount to the synchronous pinch roller 1 by the actuator 2.

The force applied by the actuator 2 to the synchronous roller 1 is adjustable, so that the rolling thickness of the tobacco sheet 4 can be adjusted. For example, the actuator 2 is a hydraulic pushing mechanism, and the actuating force of the actuator 2 is adjusted hydraulically, where the actuating force may be, for example, the level of the electric potential or the duty ratio of the output pulse, so that the acting distance of the actuator 2 can be adjusted by adjusting the actuating force to adjust the expansion and contraction amount of the actuator 2.

And step S3, rolling the tobacco sheet 4 by the synchronous rolling wheel 1 under the action of the actuator 2.

And step S4, performing feedback adjustment on the thickness of the tobacco sheet 4 according to the deviation between the rolled thickness of the tobacco sheet 4 and the preset rolled thickness.

In an embodiment of the control method for automatically adjusting the thickness of the tobacco sheet according to the present invention, the step S4 may specifically include:

and step S41, detecting the rolled thickness of the tobacco sheet 4 to obtain the rolled thickness.

Specifically, the on-line detection sensor 6 for the rolled thickness of the synchronous roller 1 may be used to detect the rolled thickness of the synchronous roller 1 on line, so as to obtain the rolled thickness.

It should be noted that the front of the synchronous rolling wheel 2 in the present invention is relative to the moving direction of the tobacco sheet 4, and is the front along the moving direction of the tobacco sheet 4.

Illustratively, the first thickness on-line detecting sensor 5 and/or the second thickness on-line detecting sensor 6 described in the foregoing in the present invention is a laser thickness gauge. The laser thickness gauge is based on the principle of triangulation ranging, and measures the distance from a triangulation ranging sensor to the surface of the tobacco sheet 4 by using an integrated triangulation ranging sensor, and then calculates the thickness of the tobacco sheet 4 according to the fixed distance of the triangulation ranging sensor. As an example and not by way of limitation, the laser thickness gauge is a laser thickness gauge model HW-843.

And step S42, calculating the deviation amount of the rolled thickness and the preset rolled thickness.

And step S43, performing feedback adjustment on the thickness of the tobacco sheet according to the deviation value by using the controller 3.

In an embodiment of the control method for automatically adjusting the thickness of the tobacco sheet according to the present invention, the step S43 may specifically include:

step S431 inputs the deviation amount to the controller 3.

In step S432, the controller 3 outputs a feedback adjustment amount.

The Controller 3 is a Programmable Logic Controller (PLC), and the PLC is, for example and without limitation, a model of siemens S7-1200.

And step S433, performing feedback adjustment on the synchronous rolling wheel 1 by using the actuating mechanism 2 based on the feedback adjustment amount.

Specifically, in some embodiments, when the rolled thickness is greater than the preset rolled thickness value, the execution amount of the actuator 2 is reduced to reduce the pushing distance of the actuator 2, so as to reduce the acting force applied by the actuator 2.

In other embodiments of the present invention, when the rolled thickness is smaller than the preset rolled thickness value, the execution amount of the actuator 2 is increased to increase the pushing distance of the actuator 2, so as to increase the acting force applied by the actuator. The propelling movement distance is big, and the interval between synchronous roller 1 and the conveyer belt 8 diminishes, and tobacco sheet 4 compresses, and the effort grow.

Therefore, the controller 3 can perform advanced adjustment on the synchronous rolling wheel 1 according to the thickness before rolling based on a feedforward-feedback control mode, and perform feedback adjustment according to the deviation of the thickness after rolling and the preset rolling thickness to obtain an adjustment quantity so as to drive the actuating mechanism 2 to correct. Specifically, the feedforward control is to make the controller 3 command the actuator 2 to extend and retract, so that the controller 3 can make an adjustment operation before the actuator 2 is not affected. The feedback control means that after the synchronous rolling wheel 1 is pushed by the actuating mechanism 2 to control the thickness of the sheet, the actual result is compared, specifically, the rolled thickness of the tobacco sheet 4 is compared with the preset rolled thickness, so that the feedback strength is adjusted. By repeatedly executing the steps S1 to S4, the thickness of the tobacco sheet 4 can be accurately controlled.

Further, the control method for automatically adjusting the thickness of the tobacco sheet further comprises the following steps:

and step S5, setting the rolling thickness control quantity of the tobacco sheet 4 by using a man-machine operation interface 7 connected with the controller 3, and displaying the thickness measurement information of the tobacco sheet 4.

The human-machine interface 7 is a touch screen, which uses a graphical software interface, and as an example and not by way of limitation, the model of the touch screen is sony SVF14a18 SC. Further, the thickness measurement information may be, for example, thickness, measurement time, and the like.

Further, the control method for automatically adjusting the thickness of the tobacco sheet further comprises the following steps:

and step S6, driving the synchronous roller 1 to rotate by using a linear motor.

According to the control method for automatically adjusting the thickness of the tobacco sheet, provided by the embodiment of the invention, the execution force of the execution mechanism is adjusted in advance according to the previous measured value, and feedback control is performed according to the deviation between the measured value and the given value, so that the thickness of the tobacco sheet tends to be in a stable state, the uniformity of the thickness of the tobacco sheet can be improved, and the forming thickness of the tobacco sheet is consistent; meanwhile, the thickness of the tobacco sheet can be measured and controlled, and the control capability in the production process is enhanced.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.