CN111693121B - Fabric gram weight on-line measuring method - Google Patents
Fabric gram weight on-line measuring method Download PDFInfo
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- CN111693121B CN111693121B CN202010518717.0A CN202010518717A CN111693121B CN 111693121 B CN111693121 B CN 111693121B CN 202010518717 A CN202010518717 A CN 202010518717A CN 111693121 B CN111693121 B CN 111693121B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/02—Apparatus for or methods of weighing material of special form or property for weighing material of filamentary or sheet form
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/08—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge
- G01G11/12—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having means for controlling the rate of feed or discharge by controlling the speed of the belt
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Abstract
The invention discloses an online measuring method for the gram weight of a fabric, which comprises the following steps: inputting or storing the width and the standard gram weight of the fabric to be detected to a central processing unit; calling a built-in fabric gram weight and fabric tension given value database to determine a fabric tension given value F0 to be measured; running the fabric to be detected; obtaining a lower measuring roller real-time load F1 and an upper measuring roller real-time load F2; calculating the weight W of the fabric to be measured; comparing F1 with F0, or F2 with (F0 + 2W): when F1 > F0 upper limit value or F2 > (F0 upper limit value + 2W), reducing the rotation speed of the driving roller; when F1 is less than F0 lower limit value or F2 is less than (F0 lower limit value + 2W), the rotation speed of the drive roll is increased; and when the lower limit value of F0 is less than or equal to the lower limit value of F1 and less than or equal to the upper limit value of F0, or the lower limit value of (F0 + 2W) is less than or equal to the upper limit value of F2 and less than or equal to the upper limit value of (F0 + 2W), keeping the rotating speed of the current driving roller unchanged, and calculating the gram weight rho of the fabric to be measured. The invention can accurately measure the gram weight of the fabric on line and improve the setting effect.
Description
Technical Field
The invention relates to a weight measuring method, in particular to an online measuring method for the gram weight of a fabric, and belongs to the technical field of textile printing and dyeing processes.
Background
Fabric grammage generally refers to the weight in grams per square meter of fabric. The gram weight of the fabric is an important index influencing the physical and mechanical properties and the wearing comfort of the fabric. Because the gram weight is changed in each working procedure of fabric bleaching, dyeing, finishing, heat setting and the like, particularly in the working procedure of fabric heat setting and finishing, the gram weight of the set cropping fabric needs to be detected on line in real time and fed into a setting control and regulation system, so that the gram weight of the fabric can be ensured to meet the process requirement, and further the product quality is ensured.
The chinese utility model patent ZL201821809762.6 discloses a fabric gram weight automatic check out system, because its gram weight detects the coefficient of friction who has neglected between each fabric guide roll axle journal and bearing, the fabric radial input tension of each fabric guide roll equals its radial output tension to derive and measure the gram weight of fabric from this. After the plain-fur fabric passes through the fixed cloth guide roller, the radial output tension of the plain-fur fabric is increased, and the more cloth guide rollers are used, the larger the output tension is, the larger the wrap angle of the fabric is, and the more the radial tension is increased, so that in the production under the actual working condition, a fabric gram weight online detection system has to control the cloth cover tension, the influence of the friction force between a cloth guide roller shaft neck and a bearing on a measurement result is reduced, and the measurement precision is improved; when the fabric setting machine works, if the cloth cover tension is well controlled, excessive drafting deformation of the fabric after the lower setting machine can be avoided, and the condition that the fabric width deviates from the process standard and influences the setting effect is prevented.
Disclosure of Invention
The invention aims to provide an on-line measuring method for the gram weight of a fabric, which can accurately measure the gram weight of the fabric on line and improve the setting effect and the product quality.
In order to solve the technical problems, the invention adopts the fabric gram weight on-line measuring method, a fabric gram weight on-line detecting system is adopted to measure the fabric gram weight, the fabric gram weight on-line detecting system comprises a fabric gram weight on-line detecting mechanism, an active traction mechanism and a central processing unit, the active traction mechanism is arranged at the cloth outlet side of the fabric gram weight on-line detecting mechanism, the fabric gram weight on-line detecting mechanism comprises at least two lower measuring rollers and an upper measuring roller which are arranged up and down along the running direction of the fabric to be measured and are parallel to each other, weighing sensors are arranged at one end or two ends of the lower measuring rollers and the upper measuring rollers, the active traction mechanism comprises an active roller and a motor, the active roller is driven by the motor, and the weighing sensors and the motor are respectively connected with the central processing unit; the method comprises the following steps:
A. inputting or storing the width and the standard gram weight of the fabric to be detected to a central processing unit;
B. the central processing unit calls a built-in fabric gram weight and fabric tension given value database to determine a fabric tension given value F0 to be measured;
C. starting a motor, and drawing the fabric to be detected to run through a driving roller;
D. the central processing unit acquires data of the weighing sensor to obtain a real-time load F1 of the lower measuring roller and a real-time load F2 of the upper measuring roller;
E. the central processing unit calculates the weight W of the fabric to be measured between the lower measuring roller and the upper measuring roller;
F. the central processing unit compares F1 with F0, or F2 with (F0 + 2W):
f1, when F1 > F0 upper limit value or F2 > (F0 upper limit value + 2W), the central processing unit reduces the rotating speed of the driving roller, returns to the step D to obtain the lower measuring roller real-time load F1 and the upper measuring roller real-time load F2 under the current state that the rotating speed of the driving roller is reduced, and then returns to the step F to execute in sequence;
f2, when F1 is more than the lower limit value of F0 or F2 is less than (the lower limit value of F0 is more than 2W), the central processing unit increases the rotating speed of the driving roller, returns to the step D to obtain the real-time load F1 of the lower measuring roller and the real-time load F2 of the upper measuring roller under the current rotating speed increasing state of the driving roller, and then returns to the step F to be executed in sequence;
f3, when the lower limit value of F0 is less than or equal to the lower limit value of F1 is less than or equal to the upper limit value of F0, or (the lower limit value of F0 + 2W) is less than or equal to the upper limit value of F2 (the upper limit value of F0 + 2W), keeping the rotating speed of the current driving roller unchanged by the central processing unit, returning to the step D to obtain the real-time load F1 of the lower measuring roller and the real-time load F2 of the upper measuring roller under the state that the rotating speed of the current driving roller is unchanged, and calculating the gram weight rho of the fabric to be measured.
In a preferred embodiment of the present invention, in step E, the fabric weight W to be measured is (F2-F1) ÷ 2, in step F3, the central processing unit keeps the current rotation speed of the driving roll unchanged, and returns to step D to obtain the real-time load of the lower measuring roll F1 and the real-time load of the upper measuring roll F2 in a state that the current rotation speed of the driving roll is unchanged, the weight ρ of the fabric to be measured is (F2-F1) ÷ 2 ÷ S, S is the area of the fabric to be measured between the lower measuring roll and the upper measuring roll, and S is the length of the fabric to be measured between the lower measuring roll and the upper measuring roll × the width of the fabric to be measured, and then returns to step D to be sequentially executed.
In a preferred embodiment of the present invention, the upper limit of F0 is (105% to 110%) x F0, and the lower limit of F0 is (90% to 95%) x F0.
In a preferred embodiment of the present invention, the central processing unit is a digital controller with a human-computer interface, or an embedded control system, or an industrial personal computer.
After the method is adopted, the invention has the following beneficial effects:
the invention can automatically set and stabilize the running tension of the fabric aiming at the fabrics with different thicknesses, reduce the influence of the friction force between the journal of the cloth guide roller and the bearing on the measurement result, avoid the interference of the measurement roller and the cloth guide roller on the measurement due to the fluctuation of the tension of the fabric, and greatly improve the precision of the gram weight measurement result.
The invention adjusts and stabilizes the running tension of the fabric according to different thicknesses of the fabric, effectively avoids excessive drafting deformation of the sizing cropping fabric and reduction of the fabric width, further stabilizes the fabric width and ensures the product quality.
The invention is adaptive to the running tension requirement of various fabrics during gram weight measurement, has strong applicability, can provide clear production guidance for after finishing, and has positive effects of reducing the labor intensity of production personnel, saving the production cost, increasing the profit margin of enterprises and improving the product competitiveness.
The invention greatly improves the automation and intelligence level of production equipment, and particularly well perfects the detection and control of key quality indexes of products in the production process, so that the product quality is further improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an on-line detection system for the grammage of a fabric in the invention.
Detailed Description
Referring to fig. 1, the invention provides an on-line measuring method for the grammage of a fabric, which measures the grammage of the fabric by using an on-line measuring system for the grammage of the fabric, wherein the on-line measuring system for the grammage of the fabric comprises an on-line measuring mechanism 1 for the grammage of the fabric, an active traction mechanism 2 arranged at the cloth outlet side of the on-line measuring mechanism 1 for the grammage of the fabric, and a central processing unit not shown in the figure, the on-line measuring mechanism 1 for the grammage of the fabric comprises at least two lower measuring rollers a and an upper measuring roller b which are arranged up and down along the running direction of a fabric 3 to be measured and are parallel to each other, weighing sensors 4 are arranged at one end or both ends of the lower measuring rollers a and the upper measuring rollers b, and bearing seats not shown in the figure can be arranged at both ends of the lower measuring rollers a and the upper measuring rollers b during implementation, the weighing sensors 4 are arranged at the bottoms of the bearing seats so as to be arranged at one end or both ends of the lower measuring rollers a and the upper measuring rollers b, the driving traction mechanism 2 comprises a driving roller 5 and a motor 6, the driving roller 5 is driven by the motor 6, and the weighing sensor 4 and the motor 6 are respectively connected with the central processing unit; in the invention, the motor 6 can drive the driving roller 5 to rotate through a transmission mechanism such as a belt, a gear and the like, the motor 6 can also directly drive the driving roller 5 to rotate through an output shaft of the motor 6, and the motor 6 is preferably connected with the central processing unit through a motor driver; the method comprises the following steps:
A. inputting or storing the width and the standard gram weight of the fabric 3 to be detected to a central processing unit;
B. the central processing unit calls a built-in fabric gram weight and fabric tension given value database to determine a fabric tension given value F0 to be measured; the database of the given value of the fabric gram weight and the fabric tension is a corresponding table of the gram weight and the tension commonly adopted by enterprises, for example, when the fabric gram weight is less than 100 grams, the corresponding given value of the fabric tension is 1000 grams; when the gram weight of the fabric is more than or equal to 100 grams and less than 150 grams, the corresponding given value of the fabric tension is 1150 grams; when the gram weight of the fabric is less than 200 grams and is less than or equal to 150 grams, the corresponding given value of the fabric tension is 1350 grams; when the gram weight of the fabric is more than or equal to 200 g and less than 250 g, the corresponding given value of the fabric tension is 1700 g and the like;
C. starting a motor 6, and drawing the fabric 3 to be detected to run through a driving roller 5;
D. the central processing unit acquires data of the weighing sensor 4 to obtain a real-time load F1 of the lower measuring roller a and a real-time load F2 of the upper measuring roller b;
E. the central processing unit calculates the weight W of the fabric to be measured between the lower measuring roller a and the upper measuring roller b;
F. the central processing unit compares F1 with F0, or F2 with (F0 + 2W):
f1, when F1 > F0 upper limit value or F2 > (F0 upper limit value + 2W), the central processing unit reduces the rotating speed of the driving roller 5, returns to the step D to obtain the real-time load F1 of the lower measuring roller a and the real-time load F2 of the upper measuring roller b under the current rotating speed reduction state of the driving roller 5, and then returns to the step F to be executed in sequence;
f2, when F1 is more than the lower limit value of F0 or F2 is less than (the lower limit value of F0 is more than 2W), the central processing unit increases the rotating speed of the driving roller 5, returns to the step D to obtain the real-time load F1 of the lower measuring roller a and the real-time load F2 of the upper measuring roller b under the current rotating speed increasing state of the driving roller 5, and then returns to the step F to be executed sequentially;
f3, when the lower limit value of F0 is less than or equal to the lower limit value of F1 is less than or equal to the upper limit value of F0, or (the lower limit value of F0 + 2W) is less than or equal to the upper limit value of F2 (the upper limit value of F0 + 2W), keeping the rotating speed of the current driving roller 5 unchanged, returning to the step D to obtain the real-time load F1 of the lower measuring roller a and the real-time load F2 of the upper measuring roller b under the state that the rotating speed of the current driving roller 5 is unchanged, and calculating the gram weight rho of the fabric to be measured.
As a preferred embodiment of the present invention, in step E, the fabric weight W to be measured is (F2-F1) ÷ 2, in step F3, the central processing unit keeps the rotation speed of the current driving roll 5 unchanged, and returns to step D to obtain the real-time load F1 of the lower measuring roll a and the real-time load F2 of the upper measuring roll b in the state that the rotation speed of the current driving roll 5 is unchanged, the fabric weight ρ to be measured is (F2-F1) ÷ 2 ÷ S, S is the area of the fabric to be measured between the lower measuring roll a and the upper measuring roll b, and S is the fabric length to be measured between the lower measuring roll a and the upper measuring roll b × the fabric width to be measured, and then returns to step D to be sequentially performed, that is, the next fabric weight measurement is performed, and the present invention preferably performs continuous fabric weight measurement. In the present invention, the fabric grammage on-line detecting system preferably further includes a mechanism for measuring the fabric area between the lower measuring roll a and the upper measuring roll b, such as a measuring light curtain, which is installed in front of the lower measuring roll a, and is connected to a central processing unit, not shown in the figure.
In a preferred embodiment of the present invention, the upper limit of F0 is (105% to 110%) x F0, and the lower limit of F0 is (90% to 95%) x F0. In the present invention, the upper limit of F0 and the lower limit of F0 may be fine-tuned, for example, F0 is (102% to 120%) × F0, and the lower limit of F0 is (80% to 98%) × F0.
In a preferred embodiment of the present invention, the central processing unit is a digital controller with a human-computer interface, such as a DDC digital controller, an embedded control system, an industrial personal computer, or the like.
Through trial, the fabric gram weight measuring device can accurately measure the gram weight of the fabric on line, improves the sizing effect and the product quality, and obtains good effect.
Claims (4)
1. An on-line measuring method for the gram weight of fabric, which adopts an on-line detecting system for the gram weight of fabric to measure the gram weight of the fabric, the fabric gram weight on-line detection system comprises a fabric gram weight on-line detection mechanism (1), an active traction mechanism (2) arranged on the cloth outlet side of the fabric gram weight on-line detection mechanism (1) and a central processing unit, the fabric gram weight on-line detection mechanism (1) comprises at least two lower measuring rollers (a) and an upper measuring roller (b) which are arranged up and down and are parallel to each other along the running direction of the fabric (3) to be detected, one end or two ends of the lower measuring roller (a) and the upper measuring roller (b) are provided with weighing sensors (4), the driving traction mechanism (2) comprises a driving roller (5) and a motor (6), the driving roller (5) is driven by a motor (6), and the weighing sensor (4) and the motor (6) are respectively connected with the central processing unit; the method is characterized by comprising the following steps:
A. inputting or storing the width and the standard gram weight of the fabric (3) to be detected to a central processing unit;
B. the central processing unit calls a built-in fabric gram weight and fabric tension given value database to determine a fabric tension given value F0 to be measured;
C. starting a motor (6), and drawing the fabric (3) to be tested to run through a driving roller (5);
D. the central processing unit acquires data of the weighing sensor (4) to obtain a real-time load F1 of the lower measuring roller (a) and a real-time load F2 of the upper measuring roller (b);
E. the central processing unit calculates the weight W of the fabric to be measured between the lower measuring roller (a) and the upper measuring roller (b);
F. the central processing unit compares F1 with F0, or F2 with (F0 + 2W):
f1, when F1 is greater than the upper limit value of F0 or F2 > (the upper limit value of F0 is plus 2W), the central processing unit reduces the rotating speed of the driving roller (5), returns to the step D to obtain the real-time load F1 of the lower measuring roller (a) and the real-time load F2 of the upper measuring roller (b) under the current rotating speed reduction state of the driving roller (5), and then returns to the step F to be executed in sequence;
f2, when F1 is less than the lower limit value of F0 or F2 is less than (the lower limit value of F0 is less than 2W), the central processing unit increases the rotating speed of the driving roller (5), returns to the step D to obtain the real-time load F1 of the lower measuring roller (a) and the real-time load F2 of the upper measuring roller (b) under the current rotating speed increasing state of the driving roller (5), and then returns to the step F to be executed in sequence;
f3, when the lower limit value of F0 is less than or equal to the lower limit value of F1 is less than or equal to the upper limit value of F0, or (the lower limit value of F0 + 2W) is less than or equal to the upper limit value of F2 (the upper limit value of F0 + 2W), keeping the rotating speed of the current driving roller (5) unchanged, returning to the step D to obtain the real-time load F1 of the lower measuring roller (a) and the real-time load F2 of the upper measuring roller (b) under the state that the rotating speed of the current driving roller (5) is unchanged, and calculating the gram weight rho of the fabric to be measured.
2. The fabric grammage on-line measuring method according to claim 1, characterized in that: in step E, the fabric weight W ═ F2-F1 ÷ 2, in step F3, the central processing unit keeps the rotation speed of the current drive roll (5) unchanged, and returns to step D to obtain the real-time load F1 of the lower measuring roll (a) and the real-time load F2 of the upper measuring roll (b) in the state that the rotation speed of the current drive roll (5) is unchanged, the gram weight ρ ═ F2-F1 ÷ 2 ÷ S of the fabric to be measured is the area of the fabric to be measured between the lower measuring roll (a) and the upper measuring roll (b), and S ═ the fabric length to be measured between the lower measuring roll (a) and the upper measuring roll (b) × the fabric width to be measured, and then returns to step D to be sequentially executed.
3. The fabric grammage on-line measuring method according to claim 1, characterized in that: the upper limit value of the F0 is (105-110%) multiplied by F0, and the lower limit value of the F0 is (90-95%) multiplied by F0.
4. The fabric grammage on-line measuring method according to any one of claims 1 to 3, characterized by: the central processing unit is a digital controller with a human-computer interface, an embedded control system or an industrial personal computer.
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| CN202010518717.0A CN111693121B (en) | 2020-06-09 | 2020-06-09 | Fabric gram weight on-line measuring method |
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| CN114199355B (en) * | 2021-12-22 | 2023-08-11 | 常州宏大智能装备产业发展研究院有限公司 | Fabric gram weight online measurement method |
| CN117490812B (en) * | 2023-12-29 | 2024-04-02 | 常州宏大智慧科技有限公司 | Fabric width-direction gram weight deviation online detection method |
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| CN101021042A (en) * | 2007-03-15 | 2007-08-22 | 上海好力纺织机电制造有限公司 | Weight-per-meter measuring device and method for fabric setting |
| EP2012099A1 (en) * | 2007-07-06 | 2009-01-07 | Mettler-Toledo AG | Control weight, method and system for tracking such weights |
| CN204202722U (en) * | 2014-12-01 | 2015-03-11 | 杨海峰 | Adhesive-bonded fabric average grammes per square metre on-line real time monitoring device |
| CN105758504A (en) * | 2016-05-11 | 2016-07-13 | 安徽元琛环保科技股份有限公司 | Automatic gram weight detecting and adjusting system for producing needled non-woven products |
| CN109238414A (en) * | 2018-11-05 | 2019-01-18 | 常州宏大智能装备产业发展研究院有限公司 | Fabric weight online test method and device |
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