A web length measuring device

Abstract

The utility model relates to a kind of roll stock length measuring devices, including base, measurement display part and fixed part being set on the base, wherein, the fixed part includes the chute being opened in the base, with the sliding connection of the chute and is used to nest the shaft core sliding block of roll stock, with the sliding connection of the chute and is used to with the dynamic baffle of the roll stock abut, fixed baffle being set in the chute end portion;The measurement display part includes calculation module, is set in the distance measuring sensor for measuring the distance between the dynamic baffle and the calculation module one side and is used to measure.The utility model can measure the remaining length of roll stock in the state of not being unfolded compared with prior art, and the measurement process does not cause material loss and measurement does not depend on production process and material sticking machine, circular cutter machine and other machines, measurement speed is fast, measurement precision is high, and the scope of application is wide, can optimize inventory statistics, and be conducive to cost control.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology, and in particular to a device for measuring the length of rolled material. Background Technology

[0002] In the closed-loop management of the product manufacturing process, rolled stock, as a core production material, is crucial for inventory management and cost accounting during its return to storage after production. According to management standards, the remaining length of leftover rolled stock must be accurately noted upon return to storage. This data directly determines the accuracy of inventory statistics and the rationality of subsequent production plans. However, the currently prevalent methods for calculating the remaining length of rolled stock in the industry, as well as the related measuring devices, have significant flaws, leading to distorted remaining length data and consequently causing a chain of negative impacts on enterprise inventory management and cost control.

[0003] The current mainstream methods for calculating the remaining length of rolled materials are divided into two categories: "difference calculation method" and "professional visual estimation method". Both methods are difficult to guarantee data accuracy due to deficiencies in principle or operation.

[0004] The core logic of the difference calculation method is "remaining length = original incoming material length on the roll label - production consumption length". The original incoming material length is a fixed value marked on the roll at the factory (usually with small errors). However, the measurement accuracy of the production consumption length is affected by multiple factors, becoming the main source of error. The measurement of production consumption length mainly relies on position sensors built into production equipment such as labeling machines and rotary cutting machines. These sensors calculate consumption length by recording the equipment's running trajectory or material conveying distance. However, in actual production scenarios, various uncontrollable factors (such as the cumulative error during machine adjustment, missing records of mid-process material changes, and the hidden impact of equipment accuracy degradation) can lead to a significant discrepancy between the measured data and the actual consumption.

[0005] The professional visual estimation method involves experienced operators or technicians estimating the remaining length by observing the diameter, thickness, and winding tightness of the roll. The core drawback of this method is that it relies entirely on subjective experience, lacks objective measurement standards, and its accuracy is greatly affected by factors such as the operator's condition and the characteristics of the roll.

[0006] To overcome the shortcomings of the two methods mentioned above, the company introduced an independent coil measurement device. However, the core principle of this device is similar to the position sensor built into the production equipment; both require "unwinding the coil," allowing it to pass through the sensing area of ​​the measuring device, and then calculating the remaining length by recording the unwinding distance. This measurement method has significant efficiency problems: the measurement process is time-consuming and the manual operation cost is high. Furthermore, during the coil unwinding measurement process, wear and tear is easily caused by physical contact, stretching, or environmental factors, further exacerbating the company's cost pressure. Since the coil length measurement problem ultimately triggers a series of chain reactions, it leads to inaccurate inventory statistics, which is detrimental to cost control.

[0007] Therefore, there is an urgent need for a simple and accurate device for measuring the remaining roll length. Utility Model Content

[0008] The purpose of this invention is to overcome the defects of the existing technology and provide a device for measuring the length of rolled material.

[0009] The objective of this utility model can be achieved through the following technical solutions:

[0010] The technical solution of this utility model is to provide a roll length measuring device, including a base, a measuring display part disposed on the base, and a fixing part.

[0011] The fixing part includes a groove formed on the base, a axial slider that is slidably connected to the groove and used for nesting the roll material, a dynamic baffle that is slidably connected to the groove and used for abutting against the roll material, and a fixed baffle provided at the end of the groove.

[0012] The measurement display unit includes a calculation module and a distance sensor located on one side of the calculation module for measuring the distance between the sensor and the dynamic baffle.

[0013] In some specific embodiments, the spindle slider includes a first slider portion embedded in and slidably connected to the groove, and a spindle portion disposed on the first slider portion for nesting the roll material.

[0014] In some specific embodiments, the diameter of the shaft core is greater than the width of the groove.

[0015] In some specific embodiments, the outer diameter of the shaft portion matches the inner diameter of the roll material, so that the roll material is fitted onto the shaft portion.

[0016] In some specific embodiments, the dynamic baffle includes a second slider portion embedded in and slidably connected to the slide groove, and a baffle portion connected to the second slider portion and extending out of the slide groove.

[0017] In some specific embodiments, the baffle portion and the second slider portion are perpendicular to each other.

[0018] In some specific embodiments, the thickness of the baffle portion is the same as the thickness of the fixed baffle.

[0019] In some specific embodiments, the computing module includes a housing disposed on the base, a display screen and a matrix keyboard disposed on the housing, and a computing chip disposed inside the housing, wherein the computing chip is communicatively connected to the ranging sensor, the display screen, and the matrix keyboard.

[0020] In some specific embodiments, the computing chip is a computing chip equipped with the following calculation formula:

[0021] D = D1 - D2 - D3 - D4 (S1),

[0022] L=π*(D 2 -d 2 ) / (4*T)(S2),

[0023] Where D1 is the distance from the distance sensor to the outside of the fixed baffle, D2 is the distance detected by the distance sensor, D3 is the thickness of the fixed baffle, D4 ​​is the thickness of the baffle section, D is the outer diameter of the roll, d is the inner diameter of the roll, T is the thickness of a single layer of the roll, and L is the length of the roll.

[0024] In some specific embodiments, the display screen is an LCD display screen, and the matrix keyboard is a 4×3 matrix keyboard.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention can measure the remaining length of a rolled material before it is unrolled. The measurement process does not cause material loss and is independent of the production process and machines such as bonding machines and rotary cutter machines. It has a fast measurement speed, high measurement accuracy, and wide applicability. It can optimize inventory statistics and is beneficial to cost control. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the roll length measuring device of this utility model.

[0028] Figure 2 This is a schematic diagram of the application of the roll length measuring device of this utility model.

[0029] The diagram is labeled as follows:

[0030] 1-Base; 11-Fixed baffle; 12-Slide groove; 2-Dynamic baffle; 21-Second slider part; 22-Baffle part; 3-Axis slider; 31-First slider part; 32-Axis part; 4-Calculation module; 41-Display screen; 42-Distance sensor; 43-Matrix keyboard; 44-Housing. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] In the following embodiments, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0035] Example 1

[0036] like Figure 1 As shown, a roll length measuring device includes a base 1, a measuring display unit and a fixing unit disposed on the base 1. The fixing unit includes a groove 12 formed on the base 1, a central slider 3 slidably connected to the groove 12 for nesting the roll, a dynamic baffle 2 slidably connected to the groove 12 for abutting against the roll, and a fixed baffle 11 disposed at the end of the groove 12. The measuring display unit includes a calculation module 4 and a distance sensor 42 disposed on one side of the calculation module 4 for measuring the distance between the sensor and the dynamic baffle 2.

[0037] Furthermore, the axis slider 3 includes a first slider portion 31 embedded in and slidably connected to the slide groove 12, and an axis portion 32 disposed on the first slider portion 31 and used for nesting the roll material.

[0038] Furthermore, the diameter of the shaft portion 32 is greater than the width of the groove 12.

[0039] Furthermore, the outer diameter of the shaft portion 32 matches the inner diameter of the roll material, so that the roll material is fitted onto the shaft portion 32.

[0040] Furthermore, the dynamic baffle 2 includes a second slider portion 21 embedded in and slidably connected to the slide groove 12, and a baffle portion 22 connected to the second slider portion 21 and extending out of the slide groove 12.

[0041] Furthermore, the baffle portion 22 is perpendicular to the second slider portion 21.

[0042] Furthermore, the thickness of the baffle portion 22 is the same as the thickness of the fixed baffle 11.

[0043] Furthermore, the computing module 4 includes a housing 44 mounted on the base 1, a display screen 41 and a matrix keyboard 43 mounted on the housing 44, and a computing chip disposed within the housing 44. The computing chip is communicatively connected to the ranging sensor 42, the display screen 41, and the matrix keyboard 43. For example, the ranging sensor is a VL53L0X, the computing chip is an STM32G030, the display screen 41 is an LCD display, and the matrix keyboard 43 is a 4×3 matrix keyboard.

[0044] Furthermore, the computing chip is a computing chip equipped with the following calculation formula:

[0045] D = D1 - D2 - D3 - D4 (S1),

[0046] L=π×(D 2 -d 2 ) / (4×T) (S2),

[0047] Wherein, D1 is the distance from the distance sensor 42 to the outside of the fixed baffle 11, D2 is the closest distance detected by the distance sensor 42 to the baffle part 22, D3 is the thickness of the fixed baffle 11, D4 is the thickness of the baffle part 22, D is the outer diameter of the roll, d is the inner diameter of the roll, T is the thickness of a single layer of the roll, and L is the length of the roll.

[0048] The derivation of the above formula is as follows:

[0049] Since the volume of the rolled material is the same as its unfolded volume, and the width / height of the rolled material is the same, therefore:

[0050] The volume of the rolled-up cylinder can be considered as the volume of a toroidal cylinder, i.e., V1 = π × (R) 2 -r 2 )h, where R is the outer radius of the coil, r is the inner radius of the coil, and h is the height;

[0051] The unfolded volume can be considered as the volume of a cuboid, i.e., V2 = L × h × T, where L is the length of the roll, h is the width of the roll (which is the same as the height of the roll), and T is the thickness of the roll.

[0052] Then π×(R) 2 -r 2 h = L × h × T;

[0053] L=π×(D 2 -d 2 ) / (4×T).

[0054] In use, D1, D3, D4, and d can all be preset, which can be regarded as a specific model for measuring the length of the roll. By inputting the thickness T of a single layer of the roll and the distance detected by the distance sensor 42, the length L of the roll can be obtained.

[0055] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A device for measuring the length of rolled material, characterized in that, Includes a base (1), a measuring display unit and a fixing unit disposed on the base (1), The fixing part includes a groove (12) opened on the base (1), a axial slider (3) slidably connected to the groove (12) and used for nesting the roll material, a dynamic baffle (2) slidably connected to the groove (12) and used for abutting against the roll material, and a fixed baffle (11) provided at the end of the groove (12). The measurement display unit includes a calculation module (4) and a distance sensor (42) located on one side of the calculation module (4) for measuring the distance between the sensor and the dynamic baffle (2).

2. The roll length measuring device according to claim 1, characterized in that, The spindle slider (3) includes a first slider part (31) embedded in the slide groove (12) and slidably connected to the slide groove (12), and a spindle part (32) disposed on the first slider part (31) and used for nesting the roll material.

3. The roll length measuring device according to claim 2, characterized in that, The diameter of the shaft (32) is greater than the width of the groove (12).

4. The roll length measuring device according to claim 2, characterized in that, The outer diameter of the core portion (32) matches the inner diameter of the roll material, so that the roll material is fitted onto the core portion (32).

5. The roll length measuring device according to claim 1, characterized in that, The dynamic baffle (2) includes a second slider part (21) that is embedded in the slide groove (12) and slidably connected to the slide groove (12), and a baffle part (22) that is connected to the second slider part (21) and extends out of the slide groove (12).

6. The roll length measuring device according to claim 5, characterized in that, The baffle portion (22) is perpendicular to the second slider portion (21).

7. The roll length measuring device according to claim 5, characterized in that, The thickness of the baffle portion (22) is the same as the thickness of the fixed baffle (11).

8. The roll length measuring device according to claim 1, characterized in that, The computing module (4) includes a housing (44) on the base (1), a display screen (41) and a matrix keyboard (43) on the housing (44), and a computing chip inside the housing (44). The computing chip is communicatively connected to the ranging sensor (42), the display screen (41), and the matrix keyboard (43).

9. The roll length measuring device according to claim 1, characterized in that, The computing chip is a computing chip equipped with the following calculation formula: D = D1 - D2 - D3 - D4(S1), L=π*(D 2 -d 2 ) / (4*T)(S2), Wherein, D1 is the distance from the distance sensor (42) to the outside of the fixed baffle (11), D2 is the distance detected by the distance sensor (42), D3 is the thickness of the fixed baffle (11), D4 is the thickness of the baffle part (22), D is the outer diameter of the roll, d is the inner diameter of the roll, T is the thickness of a single layer of the roll, and L is the length of the roll.

10. The roll length measuring device according to claim 8, characterized in that, The display screen (41) is an LCD display screen, and the matrix keyboard (43) is a 4×3 matrix keyboard.

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