阅读说明：本技术 薄膜宽度检测方法 (Film width detection method ) 是由 周宏铎 申振锁 于 2019-10-30 设计创作，主要内容包括：本发明涉及薄膜生产领域,尤其涉及一种薄膜宽度检测方法,将测宽仪安装在吹膜机的出口处,测宽仪的两个随动探头分布在薄膜两侧,开启吹膜机,计时器开始计时,起始时间T0,薄膜经过两个随动探头,调整两个随动探头的位置,使随动探头检测到薄膜边缘,并设定为初始位置,检测两个随动探头之间的间距d0,设定为初始膜宽,设定膜宽上限值d+,设定膜宽下限值d-,设定边缘偏移触发量△d0,若薄膜边缘发生偏移,随动探头检测到薄膜边缘发生偏移,随动探头向相应的方向移动,至薄膜边缘重新回到初始位置,测宽仪记录时间T1,测宽仪计算随动探头移动的距离△d1,计算薄膜的宽度值d1,重复多次至膜宽超限,报警,能够实时检测薄膜宽度值。(The invention relates to the field of film production, in particular to a film width detection method, a width gauge is arranged at an outlet of a film blowing machine, two follow-up probes of the width gauge are distributed at two sides of a film, the film blowing machine is started, a timer starts to time, the starting time T0 is set, the position of the two follow-up probes is adjusted when the film passes through the two follow-up probes, the follow-up probes detect the edge of the film and are set as the initial position, the distance d0 between the two follow-up probes is detected, the initial film width is set, the upper limit value d + of the film width is set, the lower limit value d-of the film width is set, the edge deviation triggering quantity delta d0 is set, if the edge of the film deviates, the follow-up probes detect the deviation of the edge of the film, the follow-up probes move towards the corresponding direction until the edge of the film returns to the initial position again, the width gauge records the time T1, the width, and (4) calculating the width value d1 of the film, repeating the operation for multiple times until the film width exceeds the limit, alarming, and detecting the width value of the film in real time.)

1. A method for detecting the width of a film is characterized by comprising the following steps,

a, installing a width gauge at an outlet of a film blowing machine, distributing two follow-up probes of the width gauge on two sides of a film, starting the film blowing machine, starting timing by a timer, starting time T0, enabling the film to pass through the two follow-up probes, adjusting the positions of the two follow-up probes, enabling the follow-up probes to detect the edge of the film, setting the edge to be an initial position, detecting the distance d0 between the two follow-up probes, setting the initial film width, setting the upper limit value d + of the film width, setting the lower limit value d-of the film width, and setting the edge offset triggering quantity delta d 0;

b, the follow-up probe detects the edge of the film, if the edge of the film deviates, the follow-up probe detects the deviation of the edge of the film, the deviation amount is converted into a digital signal and sent to a width measuring instrument, the width measuring instrument receives the signal and controls the follow-up probe to move towards the corresponding direction until the edge of the film returns to the initial position again, the width measuring instrument records time T1, the width measuring instrument calculates the moving distance delta d1 of the follow-up probe, calculates the width value d1 of the film, sets d1 as the initial film width, if the follow-up probe moves inwards, d1= d 0-delta d1, and if the follow-up probe moves outwards, d1= d0 +/delta d 1;

and C, repeating the step B n times to obtain dn and Tn, and when the width gauge detects that dn is higher than d + or lower than d-, the width gauge gives an alarm.

2. The film width detection method according to claim 1, wherein the width gauge comprises a host, a display is connected to the host, the servo probe comprises a rack, a lead screw is arranged on the rack, the lead screw is connected with a driving motor, the driving motor is connected with an encoder, a nut is arranged on the lead screw, a guide post is arranged between the nut and the rack, the nut is connected with a trailing edge sensor, and the trailing edge sensor, the encoder and the display are electrically connected with the host.

3. The film width detection method according to claim 2, wherein the heel side sensor is an ultrasonic heel side sensor.

Technical Field

The invention relates to the field of film production, in particular to a film width detection method.

Background

Plastic film has certain elasticity and pyrocondensation nature, becomes cylindricly through inflation film manufacturing machine blown film, then cuts, and different materials, the inflation film manufacturing machine setting parameter that different batch numbers need is different, and along with the lapse of time, product quality probably changes, for guaranteeing product quality, the state that needs the control film is in order to confirm whether inflation film manufacturing machine normally works.

In the process of production at the present stage, the state of film production is monitored mostly through the mode of artifical periodic observation, and the precision is poor, and artifical intensity of labour is high, and whether the mode through installing the grating in film both sides detects the film both sides and surpasss the scope in addition, however the film is mostly transparent film, and the detection precision of grating is poor, and only can detect the film edge through the grating whether in detection range, can not accurately detect the width of film, and the detection precision can not reach the requirement.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a film width detection method capable of detecting the width value of a film in real time.

The invention is realized by the following technical scheme: a method for detecting the width of a film comprises the following steps,

a, installing a width gauge at an outlet of a film blowing machine, distributing two follow-up probes of the width gauge on two sides of a film, starting the film blowing machine, starting timing by a timer, starting time T0, enabling the film to pass through the two follow-up probes, adjusting the positions of the two follow-up probes, enabling the follow-up probes to detect the edge of the film, setting the edge to be an initial position, detecting the distance d0 between the two follow-up probes, setting the initial film width, setting the upper limit value d + of the film width, setting the lower limit value d-of the film width, and setting the edge offset triggering quantity delta d 0;

b, the follow-up probe detects the edge of the film, if the edge of the film deviates, the follow-up probe detects the deviation of the edge of the film, the deviation amount is converted into a digital signal and sent to a width measuring instrument, the width measuring instrument receives the signal and controls the follow-up probe to move towards the corresponding direction until the edge of the film returns to the initial position again, the width measuring instrument records time T1, the width measuring instrument calculates the moving distance delta d1 of the follow-up probe, calculates the width value d1 of the film, sets d1 as the initial film width, if the follow-up probe moves inwards, d1= d 0-delta d1, and if the follow-up probe moves outwards, d1= d0 +/delta d 1;

and C, repeating the step B n times to obtain dn and Tn, and when the width gauge detects that dn is higher than d + or lower than d-, the width gauge gives an alarm.

Further, the width gauge includes the host computer, the host computer is connected with the display, the follow-up probe includes the frame, be provided with the lead screw in the frame, lead screw connection has driving motor, driving motor is connected with the encoder, be provided with the screw on the lead screw, be provided with the guide post between screw and the frame, the screw is connected with the limit sensor, be connected with limit sensor, encoder, display and host computer electricity.

Furthermore, the heel edge sensor is an ultrasonic heel edge sensor.

The invention has the beneficial effects that: the follow-up probes of the width gauge are arranged on two sides of the film, the position of the follow-up probes is adjusted to obtain the initial film width, the parameters of the film blowing machine are adjusted through a plurality of experiments, the initial state is stable in work, the measured initial distance d0 has higher reference value, d + and d-are set, the detection range of the edge of the film is set, the alarm is given after the range is exceeded, operators are reminded to process in time, the production risk is reduced, the cost is further saved, the follow-up probes can feed the offset of the edge of the film back to the width gauge, the width gauge controls the action of the follow-up probes, the control precision is high, the reaction speed is high, the initial film width continuously changes, a foundation is provided for the next detection, the moving positioning of the follow-up probes is provided, the moving distance is conveniently calculated, the timing of the original point is synchronous with the change of the initial film width, the width change curve is conveniently drawn by the width, the delta d is set, and when the servo probe detects that the film width variation reaches the delta d, the servo probe acts to adjust the position, so that the control is convenient; the width gauge comprises a host and a follow-up probe, the follow-up probe is driven by a motor and is driven by a lead screw, the number of revolutions of the motor is measured and calculated by an encoder, and further the moving distance of a nut can be obtained.

Drawings

FIG. 1 is a schematic diagram of a width gauge;

wherein: 1-left ultrasonic heel sensor, 2-left driving motor, 3-left encoder, 4-left screw rod, 5-film, 6-right ultrasonic heel sensor, 7-right screw rod, 8-right driving motor, 9-right encoder and 10-host computer.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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. 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.

In the following embodiments, the width gauge is as shown in fig. 1, and comprises a host machine, a controller is arranged in the host machine, the controller is an STM32F3 single chip microcomputer controller, the host machine is connected with a display, the display is a good-dimensional JWS02XSQ industrial control display, information such as time, a width curve of a film, a temperature of a film blowing machine, a type of a film blowing raw material, a batch number of the film blowing raw material and the like is displayed, the follow-up probes are a left follow-up probe and a right follow-up probe, the left follow-up probe comprises a left frame, a left lead screw is arranged on the left frame, the left lead screw is connected with a left driving motor, the left driving motor is connected with a left encoder, a nut is sleeved on the left lead screw, a support rod is connected with the nut, a guide column is arranged between the nut and the frame, a left ultrasonic edge following sensor is connected to the upper end of the support rod, the right follow-, the cover is equipped with the screw on the lead screw of right side, the screw is connected with branch, install the guide post between screw and the frame, the branch upper end is connected with right ultrasonic wave and follows the limit sensor, left side ultrasonic wave follows the limit sensor, left driving motor, left encoder, right ultrasonic wave follows the limit sensor, right driving motor, right encoder all is connected with the host computer electricity, seat driving motor and back driving motor all select for use ASLONG's JGB37-3530GB motor, can just reverse, and high working stability, ohm dragon E6B2-CWZ6C type encoder is all selected for use to left side encoder and right encoder, left side ultrasonic wave follows limit sensor and right ultrasonic wave and follows the limit sensor and all select for use Chongqing En Rui Si's AE-210 ultrasonic wave that science and technology limited company follow the limit sensor.

In the following examples, T0 has an initial value of 0 s.