Steel cord pay-off meter length calibration device and calibration method

Abstract

The invention relates to the technical field of steel cords, in particular to a steel cord pay-off meter length calibration device and method, and the device comprises pay-off equipment, and a vehicle frame meter counter, a calibration meter counter and a controller which are arranged at the downstream of the pay-off equipment; the calibration meter counter comprises a tension wheel set, a meter counting wheel set and a meter length monitoring part. The tension wheel group comprises a tension wheel and a pressure sensor for monitoring the pressure of a wheel shaft of the tension wheel; the meter counting wheel set comprises a main meter counting wheel and an auxiliary meter counting wheel. The original car frame meter counter follows the existing equipment and is responsible for main process metering, and the newly added meter counting wheel set and the meter length monitoring part are matched to form a high-precision meter length monitoring reference which is used for calibrating and verifying the original car frame meter counter in real time. And the process of repeatedly verifying the length of the meter by additionally rolling a steel wire due to unknown measurement accuracy of the original car frame meter counter is avoided, so that after the improvement, the accuracy of the car frame meter counter can be detected in real time, and the fault car frame can be positioned.

Description

Technical Field

[0001] The present invention relates to the technical field of steel cords, and in particular to a steel cord pay-off meter length calibration device and a calibration method. Background Art

[0002] The meter length of rope making equipment is one of the most critical indicators. The error in meter length will usually cause quality problems due to different lengths used by customers. Usually, the confirmation of meter length of rope making equipment needs to go through multiple verifications. Not only the accuracy of the platform meter recording system needs to be regularly maintained and confirmed, but other equipment or devices are also used to regularly repeat the confirmation and calibration process.

[0003] Our company's original calibration meter length is usually to transfer the product to another return equipment for reconfirmation and error calibration after the equipment runs a standard meter length. The operation is cumbersome and the process is time-consuming. There is also a risk of damaging the product during transfer. It can be seen that in the continuous pay-off production process of steel cord, if the meter length is to be ensured to meet customer requirements, more time costs and process complexity will be required, while reducing production costs will lead to the risk of non-compliance with the meter length.

[0004] Therefore, it is crucial to balance the cost of transformation and the length error to meet the requirements. Without modifying the existing platform meter and interrupting production, it is an urgent problem to be solved to be able to detect the measurement error of the platform meter in real time online and realize automatic interception of out-of-tolerance errors. Summary of the Invention

[0005] In view of the technical problems existing in the prior art in measuring the length of steel cord payout, a first aspect of the present invention provides a steel cord payout meter length calibration device, comprising a payout device and a platform meter counter, a calibration meter counter, and a controller arranged downstream of the payout device;

[0006] The calibration meter counter includes a tension wheel group, a meter wheel group and a meter length monitoring component;

[0007] The tension wheel assembly includes a tension wheel and a pressure sensor for monitoring the tension wheel axle pressure;

[0008] The meter wheel assembly includes a main meter wheel and an auxiliary meter wheel. The steel wire released by the pay-off device passes through the platform meter, the tension wheel assembly, the main meter wheel and the auxiliary meter wheel in sequence, and is wound around the surface of the main meter wheel for at least three times.

[0009] The meter length monitoring component is used to monitor the number of rotations of the main meter wheel;

[0010] Among them, the pressure sensor, the platform meter counter, the meter length monitoring component and the wire-laying equipment are electrically connected to the controller. The controller is configured to collect the meter data M1 of the platform meter counter and the meter data M2 of the calibration meter counter in real time, and when the error rate Q> the preset value M, the wire-laying equipment is controlled to stop laying out the wire, and the error rate Q = |M1-M2| / M2.

[0011] Preferably, the main meter wheel is configured to include at least three wheel grooves, and at least two of the wheel grooves are deformable wheel grooves. The deformable wheel groove is configured to include a first state and a second state. In the first state, the outer contour of the wheel groove is circular. In the second state, the outer contour of the wheel groove is a continuous curved structure with a periodically changing curvature.

[0012] When the pressure monitored by the pressure sensor exceeds a threshold, the deformable wheel groove switches from the first state to the second state.

[0013] Preferably, the outer contour of the deformable wheel groove in the second state is set to be an ellipse, and the major axis of the ellipse of the first deformable wheel groove and the major axis of the ellipse of the second deformable wheel groove are perpendicular to each other.

[0014] Preferably, the deformable wheel groove includes a first wheel body and a second wheel body, the first wheel body and the second wheel body are arranged in parallel, the first wheel body has a first contour surface, and the second wheel body has a second contour surface. The calibration meter also includes a wire-dipping component, and the wire-dipping component is used to control the steel wire to be wound around the first contour surface or the second contour surface of the deformable wheel groove, so that the deformable wheel groove is switched to the first state or the second state.

[0015] Preferably, the main meter wheel includes a fixed wheel groove and a first deformable wheel groove and a second deformable wheel groove located on both sides of the fixed wheel groove, the fixed wheel groove is provided with a first groove body, the first deformable wheel groove is provided with a second groove body, the second deformable wheel groove is provided with a third groove body, and the second groove body and the third groove body are both deformable wheel grooves.

[0016] Preferably, the number of wheel grooves of the auxiliary meter wheel is one more than the number of wheel grooves of the main meter wheel. The steel wire is first wound into the wheel groove of the auxiliary meter wheel, and then alternately wound around the wheel groove surfaces of the main meter wheel and the auxiliary meter wheel, and then wound out from the wheel groove of the auxiliary meter wheel.

[0017] Preferably, the diameter of the auxiliary meter wheel is smaller than the diameter of the main meter wheel.

[0018] Preferably, the controller is configured to control the pay-off device to stop pay-off when the error rate Q>0.5%, and to issue an early warning message when the error rate Q increases continuously for three consecutive pay-off cycles.

[0019] A second aspect of the present invention provides a method for calibrating the length of steel cord pay-off in meters, using the above-mentioned steel cord pay-off in meter calibration device, comprising the following steps:

[0020] Step 1: collecting meter length data monitored by the vehicle meter counter and the meter length monitoring component according to a predetermined pay-out cycle to obtain meter length data M1 of the vehicle meter counter and meter length data M2 of the calibration meter counter;

[0021] Step 2: Compare the difference between the meter data M1 of the vehicle meter counter and the meter data M2 of the calibration meter counter, and determine the error rate;

[0022] Step 3: Determine the metering status of the platform meter according to the error rate. When the error rate is greater than the preset value, the wire-laying device stops laying out the wire.

[0023] Preferably, the meter wheel assembly is replaced according to the prescribed pay-off meter length cycle.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] The original platform meter meter uses the existing equipment and is responsible for the main process measurement, while the newly added meter wheel set and meter length monitoring components can form a high-precision meter length monitoring benchmark for real-time calibration and verification of the original platform meter meter, avoiding the need for the original platform meter meter to add an extra wire rewinding and repeat the meter length verification process due to unknown measurement accuracy. Therefore, after this transformation, the accuracy of the platform meter can be detected in real time, the faulty platform can be located, and defective products can be effectively intercepted, realizing fully automatic dynamic calibration of the platform meter during the production process, achieving 100% defective product interception with zero manual intervention, simultaneously reducing operation and maintenance costs and releasing production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of the steel cord pay-off meter length calibration device shown in the present invention;

[0028] Figure 2 It is a structural schematic diagram of the calibration meter shown in the present invention;

[0029] Figure 3 1 is a schematic structural diagram of the main meter wheel shown in the present invention;

[0030] Figure 4Schematic diagram of the relative position relationship between the main meter wheel and the wire-digging component shown in the present invention;

[0031] Figure 5 a is a schematic diagram of the steel wire on the surface of the first wheel body of the deformable wheel groove shown in the present invention;

[0032] Figure 5 b is a schematic diagram of the steel wire on the surface of the second wheel body of the deformable wheel groove shown in the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the main meter wheel after disassembly shown in the present invention;

[0034] Figure 7 is a structural schematic diagram of the first deformable wheel groove shown in the present invention;

[0035] Figure 8 It is a structural schematic diagram of the second deformable wheel groove shown in the present invention. DETAILED DESCRIPTION

[0036] In order to better understand the technical content of the present invention, specific embodiments are given and described below with reference to the accompanying drawings.

[0037] {Example 1}

[0038] Combine Figure 1 and Figure 2 As shown, the first aspect of the present invention proposes a steel cord pay-off meter length calibration device, including a pay-off device and a platform meter, a calibration meter and a controller 310 arranged downstream of the pay-off device. The platform meter is the meter originally equipped on the platform, and the calibration meter is a newly added meter. The controller 310 is used to collect data from the two meter counters, analyze the difference between the two meter counters, evaluate the error rate of the two meter counters, and judge whether the metering is accurate based on the error rate.

[0039] Combine Figure 2 As shown, the calibration meter counter includes a tension wheel assembly 100, a meter wheel assembly 200, and a meter length monitoring component 300. The tension wheel assembly 100 is located upstream of the meter wheel assembly 200 and is primarily used to filter tension fluctuations in the upstream payout. The meter wheel assembly 200 is used to convert the payout length in meters into revolutions, while the meter length monitoring component 300 monitors this data and provides feedback on the actual payout length in meters.

[0040] The tension wheel assembly 100 includes a tension wheel 110 and a pressure sensor for monitoring the axle pressure of the tension wheel 110 .

[0041] Combine Figure 2As shown, in addition to the tension wheel 110, the tension wheel group 100 also includes a mounting plate that supports the tension wheel 110. Two wire-passing wheels are provided on the mounting plate. The tension wheel 110 is elastically connected to the mounting plate so that when the wire pay-off tension changes, the tension wheel 110 can produce elastic displacement, and the tension change is detected by a pressure sensor.

[0042] Furthermore, a support rod 120 is provided on the mounting plate, and an end line wheel 130 is provided at the end of the support rod 120 , and the meter wheel assembly 200 is installed on the support rod 120 .

[0043] Optionally, the meter wheel assembly 200 includes a main meter wheel 210 and an auxiliary meter wheel 220. The steel wire released by the wire-releasing equipment passes through the platform meter, the tension wheel assembly 100, the main meter wheel 210 and the auxiliary meter wheel 220 in sequence, and is wrapped around the surface of the main meter wheel 210 for at least three times.

[0044] It should be understood that the meter wheel assembly 200 is required to accurately reflect the length of the wire being paid out. Therefore, the wire should slip as little as possible on the surface of the main meter wheel 210. Therefore, by increasing the number of turns around the main meter wheel 210, slippage can be avoided.

[0045] Furthermore, the meter length monitoring component 300 is used to monitor the number of rotations of the main meter wheel 210 , and the actual meter length data of the pay-off can be detected according to the number of rotations of the main meter wheel 210 .

[0046] Among them, the pressure sensor, the platform meter counter, the meter length monitoring component 300 and the wire-laying equipment are electrically connected to the controller 310. The controller 310 is configured to collect the meter data M1 of the platform meter counter and the meter data M2 of the calibration meter counter in real time, and when the error rate Q> the preset value M, the wire-laying equipment is controlled to stop laying out the wire, and the error rate Q = |M1-M2| / M2.

[0047] In this way, the original platform meter meter continues to use the existing equipment and is responsible for the main process measurement, while the newly added meter wheel group 200 and meter length monitoring component 300 can form a high-precision meter length monitoring benchmark for real-time calibration and verification of the original platform meter meter, avoiding the need for the original platform meter meter to add an extra wire rewinding to repeat the meter length verification process due to unknown measurement accuracy. Therefore, after this transformation, the accuracy of the platform meter can be detected in real time, the faulty platform can be located, and defective products can be effectively intercepted.

[0048] Combine Figure 3 As shown, the main meter wheel 210 is configured to include at least three grooves, and at least two of the grooves are deformable grooves. The deformable grooves are configured to include a first state and a second state. In the first state, the outer contour of the groove is circular. In the second state, the outer contour of the groove is a continuous curved structure with a periodically changing curvature.

[0049] Thus, the steel wire around the main metering wheel 210 must pass through three grooves respectively, and the slip phenomenon is most likely to occur when the tension fluctuates, therefore, in response to the change in tension, the slip caused by the change in tension is reduced by changing the surface profile of the groove, especially after the outer profile of the groove is configured as a non-circular curve profile, the mechanical engagement effect of the steel wire and the wheel surface can be dynamically enhanced, and the slip is inhibited.

[0050] In combination Figure 2 As shown, the number of grooves of the auxiliary metering wheel 220 is one more than that of the main metering wheel 210, the steel wire is first wound into the groove of the auxiliary metering wheel 220, and then alternately wound on the groove surface of the main metering wheel 210 and the auxiliary metering wheel 220 and then wound out from the groove of the auxiliary metering wheel 220. Among them, the diameter of the auxiliary metering wheel 220 is smaller than the diameter of the main metering wheel 210.

[0051] Thus, the wrap angle of the steel wire on the surface of the main metering wheel 210 is large, which can form a larger contact area.

[0052] Further, the deformable groove is configured to include a first state and a second state that can be switched according to the change in tension, that is, when the pressure monitored by the pressure sensor exceeds the threshold value, the deformable groove is switched from the first state to the second state.

[0053] In an optional embodiment, the outer profile of the deformable groove in the second state is configured as an ellipse, and the major axis of the ellipse of the first deformable groove is perpendicular to the major axis of the ellipse of the second deformable groove.

[0054] Thus, by configuring the orthogonal ellipse, the steel wire sequentially passes through the major axis of the ellipse-orthogonal circular profile-short axis of the ellipse when winding, so that the stress and pressure generated during the winding process are unevenly changed, the effective friction coefficient is increased, and the slip is inhibited.

[0055] In combination Figures 3 to 6 As shown, the main metering wheel 210 includes a fixed groove 211 and first and second deformable grooves 212 and 213 located on both sides of the fixed groove 211, the fixed groove 211 is provided with a first groove body 202, the first deformable groove 212 is provided with a second groove body 203, and the second deformable groove 213 is provided with a third groove body 201, and the second and third groove bodies 201 and 203 are deformable grooves.

[0056] The steel wire sequentially passes through the second groove body 201, the first groove body 202 and the third groove body 203, and since the second and third groove bodies 201 and 203 are deformable grooves, when the pay-off tension of the steel wire changes, the pressure of the steel wire in the second groove body 201 or the third groove body 203 increases, and the slip is inhibited.

[0057] Wherein, the deformable wheel groove comprises a first wheel body and a second wheel body, the first wheel body and the second wheel body are arranged in parallel, the first wheel body has a first profile surface, the second wheel body has a second profile surface, the calibration meter also comprises a wire shifting component 230, the wire shifting component 230 is used for controlling the steel wire to be wound on the first profile surface or the second profile surface of the deformable wheel groove, so that the deformable wheel groove is switched to the first state or the second state.

[0058] Specifically, in combination with Figure 4 and Figure 6 As shown in the figure, the second groove body 203 is provided with a first circular profile surface 203a and a first elliptical profile surface 203b, the third groove body 201 is provided with a second circular profile surface 201a and a second elliptical profile surface 201b, the wire shifting component 230 comprises a first wire shifting clamp 231 and a second wire shifting clamp 232, the first wire shifting clamp 231 and the second wire shifting clamp 232 are synchronously controlled, so that the steel wire is switched from the position of the first circular profile surface 201a and the second circular profile surface 203a to the position of the first elliptical profile surface 201b and the second elliptical profile surface 203b or in the opposite direction, and the movement of the first wire shifting clamp 231 and the second wire shifting clamp 232 can be controlled by using an electromagnetic driving structure.

[0059] In combination with Figure 5 a and Figure 5 b, through the displacement of the first wire shifting clamp 231 and the second wire shifting clamp 232, the steel wire can be flexibly switched on the surface of the circular profile surface and the elliptical profile surface, the switching of the first state or the second state of the deformable wheel groove is realized, therefore, according to the tension change of the steel wire pay-off, the steel wire is controlled to be in different positions, and the slip caused by the tension change can be effectively inhibited.

[0060] In optional embodiments, the first deformable wheel groove 212 and the second deformable wheel groove 213 are detachably connected to the two sides of the fixed wheel groove 211, the fixed wheel groove 211 is made of stainless steel as a whole, and the first deformable wheel groove 212 and the second deformable wheel groove 213 comprise stainless steel and carbon fiber reinforced polyurethane.

[0061] Wherein, the two sides of the fixed wheel groove 211 are connection structures 211a, the middle part is a wheel surface 211b, the first groove body 202 is formed between the connection structure 211a and the wheel surface 211b, and the spoke of the fixed wheel groove 211 is also provided with a positioning hole 211c for positioning the rotation speed of the master metering wheel 210.

[0062] Wherein, the wheel frame 212a and the extension structure 212b of the first deformable wheel groove 212 are made of stainless steel, the first circular profile surface 203a and the first elliptical profile surface 203b on the surface of the extension structure 212b are made of carbon fiber reinforced polyurethane (as shown in Figure 8 ).

[0063] The wheel frame 213a and the extension structure 213b of the second deformable wheel groove 213 are made of stainless steel, and the second circular profile surface 201a and the second elliptical profile surface 201b on the surface of the extension structure 212b are made of carbon fiber reinforced polyurethane (for example Figure 7

[0064] Optionally, the inner side of the connecting structure 211a has a plug-in structure, and the extension structure can be inserted into the plug-in structure and fixed by pin connection.

[0065] In this way, compared with the stainless steel wheel surface, the first circular profile surface 203a, the first elliptical profile surface 203b, the second circular profile surface 201a and the second elliptical profile surface 201b made of carbon fiber reinforced polyurethane have greater contact friction, and in order to ensure accuracy, they can be replaced after a predetermined meter length is laid.

[0066] In the above embodiment, the controller 310 is configured to control the wire laying device to stop wire laying when the error rate Q>0.5%, and when the error rate Q of three consecutive wire laying periods continuously increases, the controller 310 sends a warning message.

[0067] In this way, by arranging two meter counters online, the meter length data formed by monitoring the number of revolutions of the main metering wheel 210 by the meter length monitoring component 300 are compared and calibrated with the car platform meter counter, the running state of the car platform meter counter can be fed back, and a mutual reflection relationship is formed between the two, on the basis of reducing the meter length verification step, the meter length error product is avoided to flow into the client.

[0068] {Embodiment 2}

[0069] The second aspect of the application provides a scheme, a calibration method for wire laying meter length of steel cord, using the steel cord wire laying meter length calibration device, comprising the following steps:

[0070] Step 1, collecting the meter length data monitored by the car platform meter counter and the meter length monitoring component 300 according to the predetermined wire laying period, obtaining the car platform meter counter metering data M1 and the calibration meter counter metering data M2;

[0071] During the wire laying process, the pressure sensor data of the tension wheel set 100 is monitored in real time, and when the tension fluctuation exceeds the threshold value, the controller 310 triggers the wire shifting component 230 to switch the steel wire from the circular profile surface of the deformable wheel groove to the elliptical profile surface, at this time, the first deformable wheel groove 212 is switched to the elliptical short axis perpendicular to the steel wire direction, high pressure anchoring can be performed, the second deformable wheel groove 213 is switched to the elliptical long axis perpendicular to the steel wire direction for stress release, and the fixed wheel groove 211 maintains the circular profile to stabilize the reference.

[0072] ​In the above process, the synchronization collection is performed per predefined period, optionally, per kilometer of the wire laying.

[0073] Step 2, compare the difference between the metering data M1 of the car platform metering device and the metering data M2 of the calibration metering device, and determine the error rate;

[0074] Step 3, according to the error rate, determine the metering state of the car platform metering device, when the error rate is greater than the preset value, the wire laying device stops wire laying.

[0075] Optionally, the controller 310 is configured to control the wire laying device to stop wire laying when the error rate Q>0.5%, and when the error rate Q of three consecutive wire laying periods continuously increases, the controller 310 sends a warning information.

[0076] Preferably, the metering wheel set 200 is replaced according to the specified wire laying metering length period.

[0077] Optionally, the replacement conditions include that the cumulative metering length reaches 500 kilometers, or the carbon fiber polyurethane profile surface wear depth is greater than 0.1mm, or the number of elliptical profile switching is more than 10000 times.

[0078] In combination with the above embodiments, the original car platform metering device continues to use the existing equipment and is responsible for the main process metering, while the newly added metering wheel set and metering length monitoring components cooperate to form a high-precision metering length monitoring reference, which is used to calibrate and verify the original car platform metering device in real time, avoiding the need to add a process of steel wire reverse rolling and repeated verification of metering length due to unknown measurement accuracy of the original car platform metering device. Therefore, after such modification, the accuracy of the car platform metering device can be detected in real time, the fault car platform can be positioned, and the defective products can be effectively intercepted, achieving full-automatic dynamic calibration of the car platform metering device in the production process, achieving 100% defective product interception without human intervention, and simultaneously reducing operation and maintenance costs and releasing production capacity.

[0079] Although the present application has been disclosed with reference to the preferred embodiments above, it is not intended to limit the present application. Those skilled in the art without departing from the spirit and scope of the present application can make various modifications and improvements. Therefore, the protection scope of the present application shall be subject to the definition of the claims.

Claims

1. A steel cord pay-off meter length calibration device, characterized in that: It includes a wire-laying device and a platform meter, a calibration meter and a controller (310) arranged downstream of the wire-laying device; The calibration meter counter comprises a tension wheel assembly (100), a meter wheel assembly (200) and a meter length monitoring component (300); The tension wheel assembly (100) comprises a tension wheel (110) and a pressure sensor for monitoring the axle pressure of the tension wheel (110); The meter wheel assembly (200) comprises a main meter wheel (210) and an auxiliary meter wheel (220); the steel wire released by the pay-off device sequentially passes through the platform meter, the tension wheel assembly (100), the main meter wheel (210) and the auxiliary meter wheel (220), and is wound around the surface of the main meter wheel (210) for at least three turns; The meter length monitoring component (300) is used to monitor the number of rotations of the main meter wheel (210); The pressure sensor, the platform meter counter, the meter length monitoring component (300) and the wire-laying device are electrically connected to a controller (310). The controller (310) is configured to collect meter data M1 of the platform meter counter and meter data M2 of the calibration meter counter in real time, and to control the wire-laying device to stop laying out the wire when the error rate Q is greater than a preset value M, and the error rate Q = |M1-M2| / M2.

2. The steel cord pay-off meter length calibration device according to claim 1, characterized in that: The main meter wheel (210) is configured to include at least three wheel grooves, and at least two of the wheel grooves are deformable wheel grooves. The deformable wheel grooves are configured to include a first state and a second state. In the first state, the outer contour of the wheel groove is circular. In the second state, the outer contour of the wheel groove is a continuous curve structure with a periodically changing curvature. When the pressure monitored by the pressure sensor exceeds a threshold, the deformable wheel groove switches from the first state to the second state.

3. The steel cord pay-off meter length calibration device according to claim 2, characterized in that: The outer contour of the deformable wheel groove in the second state is set to be an ellipse, and the ellipse major axis of the first deformable wheel groove and the ellipse major axis of the second deformable wheel groove are perpendicular to each other.

4. The steel cord pay-off meter length calibration device according to claim 2, characterized in that: The deformable wheel groove comprises a first wheel body and a second wheel body, the first wheel body and the second wheel body are arranged in parallel, the first wheel body has a first contour surface, and the second wheel body has a second contour surface. The calibration meter further comprises a wire-spinning component (230), and the wire-spinning component (230) is used to control the steel wire to be wound around the first contour surface or the second contour surface of the deformable wheel groove, so that the deformable wheel groove is switched to the first state or the second state.

5. The steel cord pay-off meter length calibration device according to claim 2, characterized in that: The main meter wheel (210) comprises a fixed wheel groove (211) and a first deformable wheel groove (212) and a second deformable wheel groove (213) located on both sides of the fixed wheel groove (211); the fixed wheel groove (211) is provided with a first groove body (202); the first deformable wheel groove (212) is provided with a second groove body (203); the second deformable wheel groove (213) is provided with a third groove body (201); and both the second groove body (201) and the third groove body (203) are deformable wheel grooves.

6. The steel cord pay-off meter length calibration device according to any one of claims 1 to 5, characterized in that: The number of wheel grooves of the auxiliary meter wheel (220) is one more than the number of wheel grooves of the main meter wheel (210). The steel wire is first wound into the wheel groove of the auxiliary meter wheel (220), then alternately wound around the wheel groove surfaces of the main meter wheel (210) and the auxiliary meter wheel (220), and finally wound out of the wheel groove of the auxiliary meter wheel (220).

7. The steel cord pay-off meter length calibration device according to claim 6, characterized in that: The diameter of the auxiliary meter wheel (220) is smaller than the diameter of the main meter wheel (210).

8. The steel cord pay-off meter length calibration device according to any one of claims 1 to 7, characterized in that: The controller (310) is configured to control the wire-paying device to stop wire-paying when the error rate Q is greater than 0.5%, and to issue an early warning message when the error rate Q increases continuously for three consecutive wire-paying cycles.

9. A method for calibrating the length of steel cord pay-off, characterized in that: The steel cord pay-off meter length calibration device according to any one of claims 1 to 8 comprises the following steps: Step 1: collecting meter length data monitored by the platform meter counter and the meter length monitoring component (300) according to a predetermined line-laying cycle, and obtaining meter length data M1 of the platform meter counter and meter length data M2 of the calibration meter counter; Step 2: Compare the difference between the meter data M1 of the vehicle meter counter and the meter data M2 of the calibration meter counter, and determine the error rate; Step 3: Determine the metering status of the platform meter according to the error rate. When the error rate is greater than the preset value, the wire-laying device stops laying out the wire.

10. The method for calibrating the steel cord pay-off length according to claim 9, characterized in that: The meter wheel assembly (200) is replaced according to the prescribed pay-off meter length cycle.

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