Tire carcass cord joint automatic detection and removal system and method

Abstract

This disclosure provides a system and method for automatically detecting and rejecting tire carcass cord splices. This system relates to the field of tire production equipment and specifically includes a cord rejection conveyor belt, a waste storage tray, a pre-cut-to-length conveyor belt, a cutting blade, a post-cut-to-length conveyor belt, a detection switch, a first cord feed conveyor belt, and a second cord feed conveyor belt. The system uses a detection switch to automatically detect multiple cord splices and their distribution to determine if they meet standards. Unqualified cords are automatically rejected and transferred to a waste storage tray, eliminating the need for manual intervention. This system can improve the production efficiency of semi-steel forming machines and reduce operator workload.

Description

Technical Field

[0001] The present disclosure relates to the field of tire production equipment, and in particular to a system and method for automatically detecting and rejecting tire carcass cord joints. Background Art

[0002] In related technologies, having more than two joints within a tire's carcass cord, or a short distance between two joints, can severely impact tire quality and life. Traditional building machines either don't inspect cord joints, or they perform manual inspection on the carcass drum during the cord assembly process. Without this inspection, tire quality is difficult to improve. If manual inspection of cord joints were required for every tire, the entire building machine's cycle time would be affected, reducing production efficiency. Summary of the Invention

[0003] The present disclosure provides a system and method for automatically detecting and removing tire carcass cord joints to at least address the low production efficiency issue in related technologies. The technical solutions of the present disclosure are as follows:

[0004] According to a first aspect of an embodiment of the present disclosure, a tire carcass cord joint automatic detection and rejection system is provided, comprising:

[0005] Fabric rejection conveyor belt, waste storage tray, fixed-length cutting front conveyor belt, cutting knife, fixed-length rear conveyor belt, detection switch, first fabric feeding conveyor belt, second fabric feeding conveyor belt;

[0006] The input end of the curtain fabric rejection conveyor belt is connected to the output end of the fixed-length cutting conveyor belt;

[0007] The input end of the fixed-length cutting front conveyor belt is connected to the output end of the fixed-length rear conveyor belt;

[0008] The cutting blade is located just above the area between the input end of the fixed-length cutting front conveyor belt and the output end of the fixed-length post conveyor belt;

[0009] The output ends of the first curtain fabric feeding conveyor belt and the second curtain fabric feeding conveyor belt are both connected to the input end of the fixed-length conveyor belt.

[0010] Optionally, the detection switch includes: a first detection switch located above the input end of the first curtain feed conveyor belt, a second detection switch located above the output end of the first curtain feed conveyor belt, a third detection switch located above the input end of the second curtain feed conveyor belt, and a fourth detection switch located above the output end of the second curtain feed conveyor belt.

[0011] According to a second aspect of an embodiment of the present disclosure, a method for automatically detecting and rejecting tire carcass cord joints is provided, which is applied to the automatic detection and rejection system for tire carcass cord joints as described in the first aspect above, comprising:

[0012] The first cord fabric feeding conveyor belt conveys the first cord fabric, and the second cord fabric feeding conveyor belt conveys the second cord fabric, and the cord fabric raw materials are conveyed to the fixed-length conveyor belt;

[0013] detecting a joint on the first curtain fabric by a third detection switch, and storing a first distance between the joint and an edge of the curtain fabric;

[0014] determining whether the length of the first curtain fabric satisfies a preset condition, and stopping feeding the first curtain fabric when the preset condition is satisfied, and cutting the first curtain fabric with a cutter to obtain a target curtain fabric;

[0015] The cord is transported to the cord rejection conveyor belt through the pre-cut-to-length conveyor belt;

[0016] The cord fabric is inspected to determine whether it is qualified, and the cord fabric is transported.

[0017] Optionally, the step of inspecting the curtain fabric to determine whether it is qualified and conveying the curtain fabric specifically includes:

[0018] If the curtain fabric is qualified, the curtain fabric is conveyed forward by the curtain fabric rejection conveyor belt;

[0019] If the cord has more than two joints or the distribution of cord joints is unqualified, the cord is transported backward to a waste storage tray by the cord rejection conveyor.

[0020] Optionally, determining whether the length of the first curtain satisfies the preset condition includes:

[0021] Set the initial values of the cord head joint offset V_Front_SP_Offset, cord tail joint offset V_Rear_SP_Offset, cord middle joint offset V_Mid_SP_Offset and cutter cutting point offset V_Cut_Offset to 0;

[0022] Determine a first target range according to V_Front_SP_Offset and the shortest distance P3 between adjacent joints, wherein the first target range is [V_Front_SP_Offset, V_Front_SP_Offset+P3];

[0023] If the first distance A1(m) corresponding to the current joint belongs to the first target range, assign the value of A1(m) corresponding to the current joint to the V_Front_SP_Offset;

[0024] And assign the sum of the current V_Cut_Offset and V_Front_SP_Offset to V_Cut_Offset;

[0025] If the first distance corresponding to the current joint does not belong to the first target range, a joint near the rear edge of the cord is acquired.

[0026] Optionally, obtaining a joint near the rear edge of the cord fabric includes:

[0027] Determining a second target range according to V_Cut_Offset, the standard length P4 of the cord, and the target length P2 of the cut-to-length delivery cord, wherein the second target range is [V_Cut_Offset+P4-P2 to V_Cut_Offset+P4];

[0028] If the first distance corresponding to the current joint is within the second target range, V_Rear_SP_Offset and V_Cut_Offset are assigned values according to the following formula:

[0029] V_Rear_SP_Offset=A1(m)-(V_Cut_Offset+P4-P2);

[0030] V_Cut_Offset=V_Cut_Offset+V_Rear_SP_Offset

[0031] If the first distance corresponding to the current joint does not fall within the second target range, it is determined whether the joint in the middle of the current layer of cord is near the head or tail edge of the next layer of cord.

[0032] Optionally, determining whether the joint in the middle of the current layer of cord is near the head or tail edge of the next layer of cord includes:

[0033] If the angle of the second fabric lags behind that of the first fabric, the value of the distance P6 from the head of the first fabric to the head of the second fabric is assigned to V_Temp;

[0034] If the angle of the first cord lags behind that of the second cord, the value of the distance P7 from the head of the first cord to the tail of the second cord is assigned to V_Temp.

[0035] Optionally, the method further includes:

[0036] Determine a third target range according to the V_Cut_Offset, V_Temp, and P3, wherein the third target range is [V_Cut_Offset+V_Temp-P3, V_Cut_Offset+V_Temp+P3];

[0037] If the first distance corresponding to the current joint is within the third target range, V_Mid_SP_Offset and V_Cut_Offset are assigned values according to the following formula:

[0038] V_Mid_SP_Offset-=A1(m)-(V_Cut_Offset+V_Temp-P3)

[0039] V_Cut_Offset=V_Cut_Offset+V_Mid_SP_Offset;

[0040] If the first distance corresponding to the current joint is not within the third target range, the delivery length is updated.

[0041] Optionally, the updating of the conveying length includes:

[0042] If the current V_Cut_Offset value is greater than 0, assign the current V_Cut_Offset value to P2;

[0043] If the current value of V_Cut_Offset is less than or equal to 0, the conveying length remains unchanged.

[0044] Optionally, after cutting the first cord fabric with a cutter to obtain a target cord fabric, the method further includes:

[0045] Delete the joints whose first distance is less than the distance P1 from the edge of the cord to the cutter;

[0046] Assign a value of 0 to P1.

[0047] Optionally, after determining whether the length of the first curtain fabric satisfies a preset condition and, when the preset condition is satisfied, stopping the conveying of the first curtain fabric and cutting the first curtain fabric with a cutter to obtain a target curtain fabric, the method further includes:

[0048] It is determined whether the length of the second curtain fabric satisfies a preset condition. When the preset condition is satisfied, the conveying of the second curtain fabric is stopped and the second curtain fabric is cut by a cutter to obtain a target curtain fabric.

[0049] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, characterized by comprising:

[0050] processor;

[0051] a memory for storing instructions executable by the processor;

[0052] The processor is configured to execute the instructions to implement the method as described in any one of the second aspects above.

[0053] According to a third aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute a method as described in any one of the above second aspects.

[0054] The technical solutions provided by the embodiments of the present disclosure bring at least the following beneficial effects:

[0055] The present invention can automatically detect whether multiple joints and joint distribution in the cord are qualified. Unqualified cords will be automatically removed to the waste storage tray without manual intervention. This system can improve the production efficiency of the semi-steel forming machine and reduce the labor intensity of the operator.

[0056] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute an improper limitation of the present disclosure.

[0058] Figure 1 The figure is a schematic structural diagram of a tire carcass cord joint automatic detection and rejection system according to an exemplary embodiment.

[0059] Figure 2 The present invention is a flowchart of a method for automatically detecting and eliminating tire carcass cord joints according to an exemplary embodiment.

[0060] Figure 3 FIG. 1 is a schematic diagram showing the relative positions of the first curtain and the second curtain according to an exemplary embodiment.

[0061] Figure 1 The reference numerals in the drawings are: cord reject conveyor belt 1, waste storage tray 2, pre-cutting conveyor belt 3, cutting knife 4, post-cutting conveyor belt 5, first cord feed conveyor belt 10, second cord feed conveyor belt 7, first detection switch 11, second detection switch 9, third detection switch 8, fourth detection switch 6. DETAILED DESCRIPTION

[0062] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0063] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0064] It should be noted that the user information involved in this disclosure (including but not limited to user device information, user personal information, etc.) is all information authorized by the user or fully authorized by all parties.

[0065] If a tire's carcass cord has more than two joints, or the distance between them is too short, it can seriously impact tire quality and life. Traditional building machines don't inspect cord joints, or they only perform manual inspections on the carcass drum during the cord assembly process. Without this inspection, tire quality is difficult to improve. If manual inspection of cord joints is required for every tire, the entire building machine's cycle time will be affected, reducing production efficiency.

[0066] Figure 1 FIG. 1 is a schematic structural diagram of a tire carcass cord joint automatic detection and rejection system according to an exemplary embodiment. Figure 1 As shown, the system includes:

[0067] Fabric rejection conveyor belt 1, waste storage tray 2, fixed-length cutting front conveyor belt 3, cutting knife 4, fixed-length rear conveyor belt 5, detection switch, first fabric feeding conveyor belt 10, second fabric feeding conveyor belt 7;

[0068] The input end of the curtain fabric rejection conveyor belt 1 is connected to the output end of the fixed-length cutting conveyor belt 3;

[0069] The input end of the fixed-length cutting front conveyor belt 3 is connected to the output end of the fixed-length rear conveyor belt 5;

[0070] The cutting blade 4 is located directly above the area between the input end of the fixed-length cutting front conveyor belt 3 and the output end of the fixed-length post conveyor belt 5;

[0071] The output ends of the first cord feeding conveyor belt 10 and the second cord feeding conveyor belt 7 are both connected to the input end of the fixed-length conveyor belt 5 .

[0072] In this embodiment, the cutting blade 4 is used to cut the first curtain fabric and the second curtain fabric to obtain the target curtain fabric.

[0073] Optionally, the detection switch includes: a first detection switch 11 located above the input end of the first curtain feed conveyor belt 10, a second detection switch 9 located above the output end of the first curtain feed conveyor belt 10, a third detection switch 8 located above the input end of the second curtain feed conveyor belt 7, and a fourth detection switch 6 located above the output end of the second curtain feed conveyor belt 7.

[0074] Figure 2 FIG. 1 is a flow chart showing a method for automatically detecting and eliminating tire carcass cord joints according to an exemplary embodiment. Figure 2 As shown, the method is applied to the tire carcass cord joint automatic detection and rejection system as described in the first aspect above, and includes:

[0075] Step 101: The first cord fabric feeding conveyor belt conveys the first cord fabric, and the second cord fabric feeding conveyor belt conveys the second cord fabric, and the cord fabric raw materials are conveyed to the fixed-length conveyor belt;

[0076] Step 102: Detecting a joint on the first curtain fabric by a third detection switch, and saving a first distance between the joint and an edge of the curtain fabric;

[0077] Step 103, determining whether the length of the first curtain fabric satisfies a preset condition, and if the preset condition is satisfied, stopping the feeding of the first curtain fabric and cutting the first curtain fabric with a cutter to obtain a target curtain fabric;

[0078] Step 104, transporting the cord fabric to the cord fabric rejection conveyor belt via the pre-cut-to-length conveyor belt;

[0079] Step 105: inspect the curtain fabric to determine whether it is qualified, and then transport the curtain fabric.

[0080] Optionally, step 105 specifically includes:

[0081] If the curtain fabric is qualified, the curtain fabric is conveyed forward by the curtain fabric rejection conveyor belt;

[0082] If the cord has more than two joints or the distribution of cord joints is unqualified, the cord is transported backward to a waste storage tray by the cord rejection conveyor.

[0083] The parameters used in the calculation in this embodiment are as follows:

[0084] P1-the distance from the edge of the curtain to the cutting knife, which is a temporary variable used for calculation;

[0085] P2-the target length of the fixed-length conveyor cord, which is a temporary variable used for calculation;

[0086] P3-The shortest distance allowed between two joints of the cord, which is a temporary variable used for calculation

[0087] P4-standard length of the first cord; comes from the formula and is a fixed value;

[0088] P5-standard length of the second cord; comes from the formula and is a fixed value;

[0089] P6 - the distance from the head of the first cord to the head of the second cord, calculated according to the recipe parameters and is a fixed value;

[0090] P7-the distance from the head of the first cord to the tail of the second cord, which is calculated according to the recipe parameters and is a fixed value;

[0091] P8 - the distance from the head of the second cord to the head of the first cord, calculated according to the recipe parameters and is a fixed value;

[0092] P9-the distance from the head of the second cord to the tail of the first cord, which is calculated according to the recipe parameters and is a fixed value;

[0093] V_Front_SP_Offset - ply head joint offset, via a temporary variable used for calculations;

[0094] V_Rear_SP_Offset - ply tail splice offset, through a temporary variable used for calculations;

[0095] V_Mid_SP_Offset - offset of the middle splice of the cord, through a temporary variable used for calculations;

[0096] A1(n)-Array A stores the distance from the first edge of the curtain to the joint. A1(0) represents the distance from the first joint to the first edge of the curtain. The distance from the joint to the first edge of the curtain is calculated by Figure 1 The detection switches 11 and 9 are used for detection, and the detection switches can be photoelectric switches.

[0097] A2(n)-Array A stores the distance from the second curtain edge to the joint. A2(0) represents the distance from the first joint to the second curtain edge. The distance from the joint to the second curtain edge is calculated by Figure 1 The detection switches 8 and 6 are used for detection, and the detection switches can be photoelectric switches.

[0098] Optionally, step 103 specifically includes:

[0099] Step 201 : Set the initial values of the cord head joint offset V_Front_SP_Offset, the cord tail joint offset V_Rear_SP_Offset, the cord middle joint offset V_Mid_SP_Offset, and the cutter cutting point offset V_Cut_Offset to 0.

[0100] Initialize by doing the following to assign the value to the right of the equal sign to the symbol of the equal sign coordinate:

[0101] V_Front_SP_Offset = 0;

[0102] V_Rear_SP_Offset=0;

[0103] V_Mid_SP_Offset = 0;

[0104] V_Cut_Offset=0.

[0105] Step 202 , determining a first target range according to V_Front_SP_Offset and the shortest distance between adjacent joints P3, wherein the first target range is [V_Front_SP_Offset, V_Front_SP_Offset+P3];

[0106] Step 203a: If the first distance A1(m) corresponding to the current joint in A1(n) falls within the first target range, indicating that the offset of the current joint relative to the cord head joint is within the acceptable range of the process standard, the value of A1(m) corresponding to the current joint is assigned to V_Front_SP_Offset;

[0107] The sum of the current V_Cut_Offset and V_Front_SP_Offset is assigned to V_Cut_Offset, and then step 203a is repeated.

[0108] Step 203b: If the first distance corresponding to the current joint does not fall within the first target range, it means that the position of the current joint is offset relative to the curtain head joint and exceeds the acceptable range of the process standard, then obtain the joint near the curtain tail edge and enter step 301.

[0109] The above steps can be used to find the joints of the cord head edge attachment.

[0110] Optionally, obtaining a joint near the rear edge of the cord fabric includes:

[0111] Step 301, determining a second target range according to V_Cut_Offset, the standard length P4 of the cord, and the target length P2 of the fixed-length conveying cord, wherein the second target range is [V_Cut_Offset+P4-P2 to V_Cut_Offset+P4].

[0112] Step 302a: If the first distance corresponding to the current joint is within the second target range, indicating that the position of the current joint relative to the cord tail joint is within the acceptable range of the process standard, then assign values to V_Rear_SP_Offset and V_Cut_Offset according to the following formula:

[0113] V_Rear_SP_Offset=A1(m)-(V_Cut_Offset+P4-P2);

[0114] V_Cut_Offset=V_Cut_Offset+V_Rear_SP_Offset

[0115] Then return to step 201.

[0116] In step 302b, if the first distance corresponding to the current joint does not fall within the second target range, it means that the position of the current joint is not offset from the joint at the end of the curtain fabric and is not within the acceptable range of the process standard. Then, determine whether the joint in the middle of the current curtain fabric layer is near the head or tail edge of the next curtain fabric layer, and then proceed to step 401a or step 401b.

[0117] The above steps can be used to find the joint of the attachment of the trailing edge of the cord.

[0118] Optionally, determining whether the joint in the middle of the current layer of cord is near the head or tail edge of the next layer of cord includes:

[0119] In step 401 a , if the angle of the second cord lags behind that of the first cord, the distance P6 from the head of the first cord to the head of the second cord is assigned to V_Temp, and then the process returns to step 201 .

[0120] Step 401 b : if the angle of the first curtain lags behind that of the second curtain, assign the value of the distance P7 from the head of the first curtain to the tail of the second curtain to V_Temp, and then proceed to step 501 .

[0121] Figure 3 FIG. 1 is a schematic diagram showing the relative positions of the first curtain and the second curtain according to an exemplary embodiment. Figure 3 As shown, Figure 3 In (a), the second curtain fabric BP2 lags behind the first curtain fabric BP1. Figure 3In (a), the first cord BP1 lags behind the second cord BP2.

[0122] Optionally, the method further includes:

[0123] Step 402 , determining a third target range based on the V_Cut_Offset, V_Temp, and P3, wherein the third target range is [V_Cut_Offset+V_Temp−P3, V_Cut_Offset+V_Temp+P3];

[0124] In step 403a, if the first distance corresponding to the current joint is within the third target range, V_Mid_SP_Offset and V_Cut_Offset are assigned values according to the following formula:

[0125] V_Mid_SP_Offset-=A1(m)-(V_Cut_Offset+V_Temp-P3)

[0126] V_Cut_Offset=V_Cut_Offset+V_Mid_SP_Offset;

[0127] Step 403b: If the first distance corresponding to the current joint is not within the third target range, proceed to step 501a or step 501b to update the conveying length.

[0128] Through the above steps, you can find out whether the joint in the middle of the current layer of curtain is near the head or tail edge of the next layer of curtain.

[0129] Optionally, the updating of the conveying length includes:

[0130] Step 501a: If the current value of V_Cut_Offset is greater than 0, assign the current value of V_Cut_Offset to P2;

[0131] Step 501b: If the current value of V_Cut_Offset is less than or equal to 0, the conveying length is kept unchanged.

[0132] Optionally, after cutting the first cord fabric with a cutter to obtain a target cord fabric, the method further includes:

[0133] Step 502, deleting the joints whose first distance is less than the distance P1 from the edge of the curtain to the cutting knife;

[0134] Step 503: assign a value of 0 to P1.

[0135] The cord is conveyed from the pre-cut-to-length conveyor belt 3 to the cord removal conveyor belt 1.

[0136] If the curtain fabric is qualified, it is conveyed to the drum and then enters step ⑺; if it is unqualified, the conveyor belt 1 is reversed and the unqualified curtain fabric is conveyed to the waste storage tray 2 between the fixed-length cutting conveyor belt 3 and the curtain removal conveyor belt 1, and then enters step 201 to re-convey the first curtain fabric.

[0137] Optionally, after determining whether the length of the first curtain fabric satisfies a preset condition and, when the preset condition is satisfied, stopping the conveying of the first curtain fabric and cutting the first curtain fabric with a cutter to obtain a target curtain fabric, the method further includes:

[0138] It is determined whether the length of the second curtain fabric satisfies a preset condition. When the preset condition is satisfied, the conveying of the second curtain fabric is stopped and the second curtain fabric is cut by a cutter to obtain a target curtain fabric.

[0139] When conveying the second curtain, the detection and rejection method for the second curtain is the same as that for the first curtain. The calculation steps are steps 201 to 503, except that the parameters P4, P6, and P7 are replaced by P5, P8, and P9; the joint array uses A2(n).

[0140] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0141] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A tire carcass cord joint automatic detection and rejection system, characterized in that: include: Fabric rejection conveyor belt, waste storage tray, fixed-length cutting front conveyor belt, cutting knife, fixed-length rear conveyor belt, detection switch, first fabric feeding conveyor belt, second fabric feeding conveyor belt; The input end of the curtain fabric rejection conveyor belt is connected to the output end of the fixed-length cutting conveyor belt; The input end of the fixed-length cutting front conveyor belt is connected to the output end of the fixed-length rear conveyor belt; The cutting blade is located just above the area between the input end of the fixed-length cutting front conveyor belt and the output end of the fixed-length post conveyor belt; The output ends of the first and second curtain fabric feeding conveyor belts are both connected to the input end of the fixed-length conveyor belt; The system further comprises: The first cord fabric feeding conveyor belt conveys the first cord fabric, and the second cord fabric feeding conveyor belt conveys the second cord fabric, and the cord fabric raw materials are conveyed to the fixed-length conveyor belt; detecting a joint on the first curtain fabric by a third detection switch, and storing a first distance between the joint and an edge of the curtain fabric; determining whether a length of the first curtain fabric satisfies a preset condition, and stopping feeding the first curtain fabric when the preset condition is satisfied, and cutting the first curtain fabric with a cutter to obtain a target curtain fabric; The cord is transported to the cord rejection conveyor belt through the pre-cut-to-length conveyor belt; Inspecting the curtain fabric to determine whether it is qualified, and conveying the curtain fabric; Determining whether the length of the first curtain satisfies the preset condition includes: Set the initial values of the cord head joint offset V_Front_SP_Offset, cord tail joint offset V_Rear_SP_Offset, cord middle joint offset V_Mid_SP_Offset and cutter cutting point offset V_Cut_Offset to 0; Determine a first target range according to V_Front_SP_Offset and the shortest distance P3 between adjacent joints, wherein the first target range is [V_Front_SP_Offset, V_Front_SP_Offset+P3]; If the first distance A1(m) corresponding to the current joint belongs to the first target range, assign the value of A1(m) corresponding to the current joint to the V_Front_SP_Offset; And assign the sum of the current V_Cut_Offset and V_Front_SP_Offset to V_Cut_Offset; If the first distance corresponding to the current joint does not belong to the first target range, a joint near the rear edge of the cord is acquired.

2. The system according to claim 1, wherein: The detection switch includes: a first detection switch located above the input end of the first curtain fabric feed conveyor belt, a second detection switch located above the output end of the first curtain fabric feed conveyor belt, a third detection switch located above the input end of the second curtain fabric feed conveyor belt, and a fourth detection switch located above the output end of the second curtain fabric feed conveyor belt.

3. The system according to claim 1, wherein: The steps of inspecting the curtain fabric to determine whether it is qualified and conveying the curtain fabric specifically include: If the curtain fabric is qualified, the curtain fabric is conveyed forward by the curtain fabric rejection conveyor belt; If the cord has more than two joints or the distribution of cord joints is unqualified, the cord is transported backward to a waste storage tray by the cord rejection conveyor.

4. The system according to claim 1, wherein: The step of obtaining a joint near the rear edge of the cord fabric comprises: Determining a second target range according to V_Cut_Offset, the standard length P4 of the cord, and the target length P2 of the cut-to-length delivery cord, wherein the second target range is [V_Cut_Offset+P4-P2 to V_Cut_Offset+P4]; If the first distance corresponding to the current joint is within the second target range, V_Rear_SP_Offset and V_Cut_Offset are assigned values according to the following formula: V_Rear_SP_Offset=A1(m)-(V_Cut_Offset+P4-P2); V_Cut_Offset=V_Cut_Offset+V_Rear_SP_Offset If the first distance corresponding to the current joint does not fall within the second target range, it is determined whether the joint in the middle of the current layer of cord is near the head or tail edge of the next layer of cord.

5. The system according to claim 4, characterized in that The step of determining whether the joint in the middle of the current layer of cord is near the head or tail edge of the next layer of cord includes: If the angle of the second fabric lags behind that of the first fabric, the value of the distance P6 from the head of the first fabric to the head of the second fabric is assigned to V_Temp; If the angle of the first cord lags behind that of the second cord, the value of the distance P7 from the head of the first cord to the tail of the second cord is assigned to V_Temp.

6. The system according to claim 5, characterized in that The system further comprises: Determine a third target range according to the V_Cut_Offset, V_Temp, and P3, wherein the third target range is [V_Cut_Offset+V_Temp-P3, V_Cut_Offset+V_Temp+P3]; If the first distance corresponding to the current joint is within the third target range, V_Mid_SP_Offset and V_Cut_Offset are assigned values according to the following formula: V_Mid_SP_Offset-=A1(m)-(V_Cut_Offset+V_Temp-P3) V_Cut_Offset=V_Cut_Offset+V_Mid_SP_Offset; If the first distance corresponding to the current joint is not within the third target range, the delivery length is updated.

7. The system according to claim 6, characterized in that The updating of the conveying length includes: If the current V_Cut_Offset value is greater than 0, assign the current V_Cut_Offset value to P2; If the current value of V_Cut_Offset is less than or equal to 0, the conveying length remains unchanged.

8. The system according to claim 1, wherein: After the first cord fabric is cut by a cutter to obtain a target cord fabric, the method further includes: Delete the joints whose first distance is less than the distance P1 from the edge of the cord to the cutter; Assign a value of 0 to P1.

9. The system according to claim 1, wherein: After determining whether the length of the first curtain fabric satisfies the preset condition, and stopping the feeding of the first curtain fabric and cutting the first curtain fabric with a cutter to obtain a target curtain fabric when the preset condition is satisfied, the method further includes: It is determined whether the length of the second curtain fabric satisfies the preset condition. If the preset condition is satisfied, the conveying of the second curtain fabric is stopped and the second curtain fabric is cut by a cutter to obtain a target curtain fabric.

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