On-line detection method and device for fabric weight

Abstract

The present invention discloses an online detection method and device for fabric weight, the method comprising the following steps: a, arranging at least five first fabric guide rollers, second fabric guide rollers, third fabric guide rollers, fourth fabric guide rollers and fifth fabric guide rollers which are staggered and arranged in parallel with each other in sequence along the fabric running route; b, setting the fifth fabric guide roller as an active roller, and the fabrics between the first fabric guide roller, the second fabric guide roller, the third fabric guide roller, the fourth fabric guide roller and the fifth fabric guide roller run vertically; c, measuring the real-time load F2 of the second fabric guide roller, the real-time load F3 of the third fabric guide roller and the real-time load F4 of the fourth fabric guide roller; d, obtaining the fabric weight ρ between the second fabric guide roller and the fourth fabric guide roller according to the fabric length L between the second fabric guide roller and the fourth fabric guide roller, the fabric width W and the real-time load F2 of the second fabric guide roller, the real-time load F3 of the third fabric guide roller and the real-time load F4 of the fourth fabric guide roller. The present invention can accurately measure the fabric weight, is easy to operate and can avoid deformation of the fabric.

Description

Technical Field

[0001] The present invention relates to a method and device for online detection of fabric weight, belonging to the technical field of textile printing and dyeing.

[0002] Fabric weight generally refers to the weight of fabric per square meter. Fabric weight is an important indicator that affects the physical and mechanical properties of fabrics and wearing comfort. Since the weight changes in each process of fabric bleaching, dyeing, finishing, heat setting, etc., only by real-time online detection of fabric weight and guiding the finishing process to formulate processing technology can the weight of fabrics in each process be kept stable and product quality be improved.

[0003] Chinese utility model patent ZL201821809762.6 discloses an online detection device for fabric weight. Since its weight detection ignores the friction coefficient of the bearings at the ends of each guide roller, the radial input tension of the fabric of each guide roller is equal to its radial output tension, and the weight of the fabric is derived and measured. After the flat fabric passes through the fixed guide roller, its radial output tension increases accordingly. Moreover, the more guide rollers it passes through, the greater the output tension, the greater the fabric wrap angle, and the more the radial tension increases. Therefore, in actual production conditions, the online detection device for fabric weight must control the tension of the fabric surface, reduce the influence of the friction between the guide roller shaft neck and the bearing on the measurement result, and improve the measurement accuracy; when working, if the tension of the fabric surface is well controlled, it can also avoid excessive stretching and deformation of the fabric after the setting machine, and prevent the fabric width from deviating from the process standard and affecting the setting effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for online detection of fabric weight that can significantly reduce fabric surface tension, avoid fabric deformation, and accurately measure fabric weight. At the same time, the present invention also provides a device for online detection of fabric weight using the above method.

[0005] In order to solve the above technical problems, the present invention adopts such a method for online detection of fabric weight, comprising the following steps:

[0006] a. Arrange at least five first cloth guide rollers, second cloth guide rollers, third cloth guide rollers, fourth cloth guide rollers and fifth cloth guide rollers in an up-and-down staggered and mutually parallel manner along the fabric running route;

[0007] b. The fifth cloth guide roller is set as an active roller, the fifth cloth guide roller pulls the fabric to run, and the fabric between the first cloth guide roller, the second cloth guide roller, the third cloth guide roller, the fourth cloth guide roller and the fifth cloth guide roller runs vertically;

[0008] c. Measure the real-time load F2 of the second cloth guide roller, the real-time load F3 of the third cloth guide roller and the real-time load F4 of the fourth cloth guide roller;

[0009] d. Obtain the fabric weight ρ between the second cloth guide roller and the fourth cloth guide roller according to the fabric length L between the second cloth guide roller and the fourth cloth guide roller, the fabric width W, and the real-time load F2, the real-time load F3 and the real-time load F4 of the second cloth guide roller.

[0010] As a preferred embodiment of the present invention, in step d, the fabric weight ρ=(F3- )÷S, S is the fabric area between the second cloth guide roller and the fourth cloth guide roller, S=L×W.

[0011] In order to solve the above technical problems, the present invention adopts such an online detection device for fabric weight, comprising: a plurality of weighing sensors and a central processing unit, wherein the weighing sensors are connected to the central processing unit; and at least five first fabric guide rollers, second fabric guide rollers, third fabric guide rollers, fourth fabric guide rollers and fifth fabric guide rollers are sequentially arranged along the fabric running route and are staggered up and down and arranged parallel to each other;

[0012] The second cloth guide roller is located between the first cloth guide roller and the third cloth guide roller, and the fourth cloth guide roller is located between the third cloth guide roller and the fifth cloth guide roller;

[0013] The horizontal distance between the roller surface of the first cloth guide roller and the roller surface of the third cloth guide roller is equal to the diameter of the second cloth guide roller;

[0014] The horizontal distance between the roller surface of the second cloth guide roller and the roller surface of the fourth cloth guide roller is equal to the diameter of the third cloth guide roller;

[0015] The horizontal distance between the roller surface of the third cloth guide roller and the roller surface of the fifth cloth guide roller is equal to the diameter of the fourth cloth guide roller;

[0016] The weighing sensor is installed at one end or both ends of the second cloth guide roller, the third cloth guide roller and the fourth cloth guide roller, and the fifth cloth guide roller is driven by a motor, and the motor is controlled by a central processing unit.

[0017] As a preferred embodiment of the present invention, bearing seats are provided at both ends of the second cloth guide roller, the third cloth guide roller and the fourth cloth guide roller, and the weighing sensor is connected to the bearing seats.

[0018] As a preferred embodiment of the present invention, bearings and short shafts are respectively installed at both ends of the second cloth guide roller, the third cloth guide roller and the fourth cloth guide roller, one end of the short shaft is connected to the inner ring of the bearing, and the other end of the short shaft is connected to the weighing sensor.

[0019] As a preferred embodiment of the present invention, the motor drives the fifth cloth guide roller to rotate via its output shaft, or drives the fifth cloth guide roller to rotate via a transmission mechanism.

[0020] As a preferred embodiment of the present invention, the central processing unit is a digital controller or an embedded system or an industrial computer with a human-machine interface.

[0021] After adopting the above-mentioned fabric weight online detection method and device, the present invention has the following beneficial effects:

[0022] The present invention sets the fifth cloth guide roller as an active roller. The fifth cloth guide roller is driven by a motor. The motor is controlled by a central processing unit. The fifth cloth guide roller pulls the fabric to run, which greatly reduces the tension on the fabric surface and reduces the influence of the friction force of the bearing at the end of the cloth guide roller shaft on the measurement result. The present invention can not only accurately detect the gram weight per square meter of the fabric in real time, but also avoid deformation of the fabric, keep the fabric tension constant, and greatly improve the measurement accuracy.

[0023] The present invention arranges a first cloth guide roller, a second cloth guide roller, a third cloth guide roller, a fourth cloth guide roller and a fifth cloth guide roller on the fabric running route, and the fabric is in a vertical moving state between the five cloth guide rollers, thereby greatly reducing the difficulty of installing the relative positions of the cloth guide rollers, and easily realizing high-precision measurement and operation through simple installation technology and adjustment methods.

[0024] The invention optimizes the gram weight measurement calculation, has higher measurement accuracy, and well realizes the high-precision measurement of the gram weight of the fabric online.

[0025] The present invention greatly reduces the difficulty of installing the cloth guide roller, facilitates future maintenance, and ensures reliable operation of the device.

[0026] The invention can reflect the grammage per square meter of the fabric in real time and accurately, and avoids the disadvantages of low work efficiency, damage to the fabric surface and waste of fabric caused by manual fabric cutting and sampling.

[0027] The invention has a simpler structure, is easier to operate, and has a higher working efficiency. The real-time fabric weight measured is used to guide the finishing process to formulate a processing technique, so that the fabric weight in production is kept stable and the product qualification rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic structural diagram of a preferred embodiment of the online detection device for fabric weight of the present invention. DETAILED DESCRIPTION

[0030] In order to accurately measure the fabric weight, the present invention adopts such an online fabric weight detection method, see Figure 1 , including the following steps:

[0031] a. Arrange at least five first cloth guide rollers A, second cloth guide rollers B, third cloth guide rollers C, fourth cloth guide rollers D and fifth cloth guide rollers E in sequence, staggered and parallel to each other along the fabric running route;

[0032] b. The fifth cloth guide roller E is set as an active roller, i.e., a traction roller. The fifth cloth guide roller E tractions the fabric to run, and the fabric between the first cloth guide roller A, the second cloth guide roller B, the third cloth guide roller C, the fourth cloth guide roller D and the fifth cloth guide roller E runs vertically, i.e., the fabric between the first cloth guide roller A and the second cloth guide roller B, the fabric between the second cloth guide roller B and the third cloth guide roller C, the fabric between the third cloth guide roller C and the fourth cloth guide roller D, and the fabric between the fourth cloth guide roller D and the fifth cloth guide roller E all run vertically;

[0033] c. Measure the real-time load F2 of the second cloth guide roller B, the real-time load F3 of the third cloth guide roller C and the real-time load F4 of the fourth cloth guide roller D, wherein the real-time loads F2, F3 and F4 are preferably the real-time loads obtained by removing the deadweight of the second cloth guide roller B, the third cloth guide roller C and the fourth cloth guide roller D and the weight of their accessories;

[0034] d. Obtain the fabric weight ρ between the second fabric guide roller B and the fourth fabric guide roller D according to the fabric length L between the second fabric guide roller B and the fourth fabric guide roller D, the fabric width W, the real-time load F2 of the second fabric guide roller B, the real-time load F3 of the third fabric guide roller C, and the real-time load F4 of the fourth fabric guide roller D. The fabric length L between the second fabric guide roller B and the fourth fabric guide roller D may be the fabric length between the tangent point of the second fabric guide roller B and the tangent point of the fourth fabric guide roller D, or the fabric length between the lowest point of the second fabric guide roller B and the lowest point of the fourth fabric guide roller D, or the fabric length between any point of the second fabric guide roller B and any point of the fourth fabric guide roller D, etc.

[0035] As a preferred embodiment of the above method, in step d, the fabric weight ρ=(F3- )÷S, S is the fabric area between the second fabric guide roller B and the fourth fabric guide roller D, S=L×W. Due to the friction coefficient of the bearings at the end of each fabric guide roller, the radial output tension of the flat fabric increases after passing through the fabric guide rollers, and the more fabric passes through the fabric guide rollers, the greater the fabric tension. Therefore, the average value of the real-time load F2 of the second fabric guide roller B and the real-time load F4 of the fourth fabric guide roller D can well compensate for the influence of the different fabric tensions between the fabric guide rollers on the calculation results. For example, ρ=(F3- )÷S, the accuracy of the calculation result is much higher than ρ=(F3-F2)÷S or ρ=(F3-F4)÷S.

[0036] See also Figure 1The device for detecting fabric weight online shown in the figure comprises: a plurality of weighing sensors 1 and a central processing unit, wherein the weighing sensors 1 are connected to the central processing unit by wire or wireless, and the central processing unit is not shown in the figure; and the device further comprises at least five first cloth guide rollers A, second cloth guide rollers B, third cloth guide rollers C, fourth cloth guide rollers D and fifth cloth guide rollers E which are arranged in sequence along the fabric running route and are staggered up and down and parallel to each other; in the present invention, it is preferred that the first cloth guide rollers A, the third cloth guide rollers C and the fifth cloth guide rollers E are arranged at the top and horizontally, and the second cloth guide rollers B and the fourth cloth guide rollers D are arranged at the bottom and horizontally. Of course, the first cloth guide rollers A, the third cloth guide rollers C and the fifth cloth guide rollers E may be arranged at the bottom and horizontally, and the second cloth guide rollers B and the fourth cloth guide rollers D may be arranged at the top and horizontally, or the five rollers may be arranged at any height, which is not shown in the figure;

[0037] The second cloth guide roller B is located between the first cloth guide roller A and the third cloth guide roller C, and the fourth cloth guide roller D is located between the third cloth guide roller C and the fifth cloth guide roller E;

[0038] The horizontal distance between the roller surface of the first cloth guide roller A and the roller surface of the third cloth guide roller C is equal to the diameter of the second cloth guide roller B;

[0039] The horizontal distance between the roller surface of the second cloth guide roller B and the roller surface of the fourth cloth guide roller D is equal to the diameter of the third cloth guide roller C;

[0040] The horizontal distance between the roller surface of the third cloth guide roller C and the roller surface of the fifth cloth guide roller E is equal to the diameter of the fourth cloth guide roller D;

[0041] The weighing sensor 1 is installed at one end or both ends of the second cloth guide roller B, the third cloth guide roller C and the fourth cloth guide roller D. The fifth cloth guide roller E is driven by a motor 2. The motor 2 is controlled by a central processing unit. The motor 2 can be connected to the central processing unit by wire or wirelessly.

[0042] As a preferred embodiment of the present invention, Figure 1 As shown, bearing seats 3 are provided at both ends of the second cloth guide roller B, the third cloth guide roller C and the fourth cloth guide roller D, and the weighing sensor 1 is connected to the bearing seat 3. During implementation, the top plate of the weighing sensor 1 is fixedly connected to the bottom plate of the bearing seat 3 by bolts, and the weighing sensor 1 is fixedly installed on a frame, which is not shown in the figure.

[0043] As a preferred embodiment of the present invention, bearings and short shafts are respectively installed at both ends of the second cloth guide roller B, the third cloth guide roller C and the fourth cloth guide roller D, one end of the short shaft is connected to the inner ring of the bearing, and the other end of the short shaft is connected to the weighing sensor 1. During implementation, the second cloth guide roller B, the third cloth guide roller C and the fourth cloth guide roller D are respectively installed on the outer ring of the bearing, one end of the short shaft is connected to the inner ring of the bearing, and the other end of the short shaft is connected to the weighing sensor 1. The weighing sensor 1 is fixedly installed on the frame, which is not shown in the figure.

[0044] As a preferred embodiment of the present invention, the motor 2 drives the fifth cloth guide roller E to rotate via its output shaft, or drives the fifth cloth guide roller E to rotate via a transmission mechanism such as a synchronous belt transmission mechanism, a gear transmission mechanism, or a chain transmission mechanism.

[0045] As a preferred embodiment of the present invention, the central processing unit is a digital controller with a human-machine interface, such as a DDC digital controller or an embedded system or an industrial computer.

[0046] After trial use, the invention can accurately measure the grammage of fabrics, has a simple structure, is easy to install and operate, can avoid deformation of fabrics, and has achieved good results.

Claims

1. A method for online detection of fabric weight, characterized in that: The following steps are involved: a. at least five first cloth guide rollers (A), second cloth guide rollers (B), third cloth guide rollers (C), fourth cloth guide rollers (D) and fifth cloth guide rollers (E) are sequentially arranged along the fabric running route, staggered up and down and parallel to each other; b. The fifth cloth guide roller (E) is set as an active roller, the fifth cloth guide roller (E) pulls the fabric to run, and the fabric between the first cloth guide roller (A), the second cloth guide roller (B), the third cloth guide roller (C), the fourth cloth guide roller (D) and the fifth cloth guide roller (E) runs vertically; c. Measure the real-time load F2 of the second cloth guide roller (B), the real-time load F3 of the third cloth guide roller (C), and the real-time load F4 of the fourth cloth guide roller (D); d. Obtain the fabric weight ρ between the second fabric guide roller (B) and the fourth fabric guide roller (D) according to the fabric length L between the second fabric guide roller (B) and the fourth fabric guide roller (D), the fabric width W, the real-time load F2 of the second fabric guide roller (B), the real-time load F3 of the third fabric guide roller (C), and the real-time load F4 of the fourth fabric guide roller (D); wherein, S is the fabric area between the second fabric guide roller (B) and the fourth fabric guide roller (D); A weighing sensor (1) is installed at one end or both ends of the second cloth guide roller (B), the third cloth guide roller (C) and the fourth cloth guide roller (D), and the fifth cloth guide roller (E) is driven by a motor (2).

2. The method for online detection of fabric weight according to claim 1, characterized in that: S=L×W.

3. An online detection device for fabric weight using the method of claim 1, comprising: A plurality of weighing sensors (1) and a central processing unit, wherein the weighing sensors (1) are connected to the central processing unit; the characteristics are: It also includes at least five first cloth guide rollers (A), second cloth guide rollers (B), third cloth guide rollers (C), fourth cloth guide rollers (D) and fifth cloth guide rollers (E) which are arranged in sequence along the fabric running route and are staggered up and down and parallel to each other; The second cloth guide roller (B) is located between the first cloth guide roller (A) and the third cloth guide roller (C), and the fourth cloth guide roller (D) is located between the third cloth guide roller (C) and the fifth cloth guide roller (E); The horizontal distance between the roller surface of the first cloth guide roller (A) and the roller surface of the third cloth guide roller (C) is equal to the diameter of the second cloth guide roller (B); The horizontal distance between the roller surface of the second cloth guide roller (B) and the roller surface of the fourth cloth guide roller (D) is equal to the diameter of the third cloth guide roller (C); The horizontal distance between the roller surface of the third cloth guide roller (C) and the roller surface of the fifth cloth guide roller (E) is equal to the diameter of the fourth cloth guide roller (D); The weighing sensor (1) is installed at one end or both ends of the second cloth guide roller (B), the third cloth guide roller (C) and the fourth cloth guide roller (D); the fifth cloth guide roller (E) is driven by a motor (2), and the motor (2) is controlled by a central processing unit.

4. The online detection device for fabric weight according to claim 3 is characterized in that: Bearing seats (3) are provided at both ends of the second cloth guide roller (B), the third cloth guide roller (C) and the fourth cloth guide roller (D), and the weighing sensor (1) is connected to the bearing seats (3).

5. The online detection device for fabric weight according to claim 3 is characterized in that: The second cloth guide roller (B), the third cloth guide roller (C) and the fourth cloth guide roller (D) are respectively provided with bearings and short shafts at both ends, one end of the short shaft is connected to the inner ring of the bearing, and the other end of the short shaft is connected to the weighing sensor (1).

6. The on-line detection device for fabric weight according to claim 3 is characterized in that: The motor (2) drives the fifth cloth guide roller (E) to rotate via its output shaft, or drives the fifth cloth guide roller (E) to rotate via a transmission mechanism.

7. The on-line detection device for fabric weight according to claim 3, 4, 5 or 6, characterized in that: The central processing unit is a digital controller or an embedded system or an industrial computer with a human-machine interface.

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