Non-contact sizing machine multi-warp beam unwinding length intelligent control device and method

Abstract

The present invention relates to a non-contact multi-warp beam unwinding length intelligent control device and method for a non-contact sizing machine. By real-time monitoring of the outer diameter of the yarn roll on each warp beam and the number of unwinding turns of each warp beam during the unwinding process, the length of the unwound yarn of each warp beam is calculated, and the braking force of the warp beam is timely adjusted according to the unwinding length deviation of the unwound warp yarn of each warp beam, so that the unwinding length deviation rate of the unwound warp yarn on each warp beam fluctuates within a very small range, so that the unwinding amount of the warp yarn on each warp beam can be controlled to remain basically consistent, the goal of synchronous unwinding is achieved, and the tension uniformity of the unwound yarn on different warp beams is also guaranteed. Since the braking force of the warp beam is continuously adjusted during the unwinding process, the cumulative error generated by any warp beam in one adjustment cycle during the production process will be corrected in the next or next few cycles, thus avoiding the continuous expansion of the cumulative error.

Description

Technical Field

[0001] The invention belongs to the technical field of textile equipment, and in particular relates to a non-contact type sizing machine multi-warp beam unwinding length intelligent control device and method. Background Art

[0002] The sizing machine is a textile production equipment used to size the warp yarns required for weaving. During the sizing process, the warp yarns are first unwound from several warp beams arranged on the warp beam frame, then transported to the sizing tank to absorb the slurry, enter the drying room for drying, and finally wound onto a warp beam at the head of the locomotive. Among them, each warp beam on the warp beam frame is produced by a warping machine, and each warp beam is wound with hundreds to thousands of warp yarns in parallel. During the production process of each warp beam, the winding length and winding tension of the warp yarn are precisely controlled by the warping machine.

[0003] At present, each warp beam is fixed on the warp beam frame by bearings, and the main power of unwinding is provided by the headstock. Each warp beam is equipped with a brake device to control the tension of the warp yarn on each warp beam when unwinding. In theory, when the tension of each warp beam is configured to a consistent level, the unwinding length of each warp beam is consistent. However, in actual production, due to mechanical state and human operation errors, the tension configuration of each brake device is difficult to keep consistent, which leads to differences in the unwinding length of each warp beam. This phenomenon causes uneven warp tension, resulting in reduced manufacturing efficiency, and on the other hand, a large amount of warp yarn remains on the warp beam at the end of the production batch, resulting in a waste of resources.

[0004] In order to solve the above problems, patents such as "Constant Tension Electronic Unwinding Pneumatic Control Device for Warp Yarn of Sizing Machine (Application No. 200510040762.5)" and "Tension Control Device and Tension Control Method for Sizing Machine Transmitting Device (202110762964.X)" all propose to use a tension detection device to detect the warp tension corresponding to the output of each warp beam, and use a closed-loop control system to dynamically adjust the braking force of the braking device. It is intended to achieve the consistency of unwinding of each warp beam by controlling the tension of the unwound warp. However, this method has the following disadvantages: 1) The setting of the tension detection device has a certain impact on the performance of the warp yarn; 2) The setting of the tension detection device increases the complexity of the operation of the sizing machine; 3) The system has high requirements on the accuracy of tension detection and tension control, and the system is difficult to maintain; 4) The object detected by the tension detection device may be only a small part of the warp yarn on each weaving beam, so there may be sampling errors.

[0005] According to actual production experience, the effect of achieving consistency in unwinding of each warp beam by controlling the tension of the unwinding warp yarn on each warp beam is not ideal. When the warp yarn is unwound, there are often different amounts of residual yarn on each warp beam, and the amount of residual yarn on some warp beams is very large. It is common to have more than 100 meters of residual yarn. Summary of the invention

[0006] The first technical problem to be solved by the present invention is: to provide a non-contact sizing machine multi-warp beam unwinding length intelligent control device to solve the current technical problems of inaccurate tension control in the warp unwinding process, asynchronous unwinding of each warp beam, failure to eliminate the accumulated error when some warp beams are unwound, and a large amount of residual warp yarn at the end of the production batch, resulting in waste of resources.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a non-contact type sizing machine multi-warp beam unwinding length intelligent control device, including a control module, a storage module, multiple yarn roll outer diameter detection modules corresponding one-to-one to the warp beams on the warp beam frame, multiple speed detection modules corresponding one-to-one to the warp beams on the warp beam frame, multiple brakes corresponding one-to-one to the warp beams on the warp beam frame, and a braking force adjustment module corresponding one-to-one to the brake, the control module and the storage module are communicatively connected, the yarn roll outer diameter detection module and the speed detection module are electrically connected to the control module respectively, the brakes are connected one-to-one to the ends of the warp beams and fixedly connected to the warp beam frame where the warp beams are located, the braking force adjustment module is connected to the brake to adjust the braking force of the brake, and the braking force adjustment module is also connected to the control module and controlled by the control module.

[0008] As a preferred solution, the yarn roll outer diameter detection module is a laser rangefinder or a photoelectric rangefinder. The yarn roll outer diameter detection module is fixedly connected to the warp axis frame so that the yarn roll outer diameter detection module is perpendicular to the warp axis. The diameter data of the yarn roll is detected during the rotation of the warp axis on the warp axis frame and sent to the control module. After processing by the control module, the data is stored in the storage module.

[0009] As a preferred solution, the speed detection module is any one of a Hall sensor, a magnetoelectric sensor, and a magnetoresistive sensor. Any speed detection module is fixedly connected to one end of the warp shaft frame to detect the number of turns of the corresponding warp shaft unwinding on the warp shaft frame and send it to the control module.

[0010] As a preferred solution, the brake is a piston brake, and the braking force adjustment module is a proportional valve connected to the hydraulic oil circuit or the air circuit.

[0011] The technical problem further to be solved by the present invention is: to provide a non-contact sizing machine multi-warp beam unwinding length intelligent control method to solve the current technical problems of inaccurate tension control in the warp unwinding process, asynchronous unwinding of each warp beam, failure to eliminate the accumulated error when some warp beams are unwound, and a large amount of residual warp yarn at the end of the production batch resulting in waste of resources.

[0012] In order to solve the above technical problems, the technical solution adopted by the present invention is: a non-contact multi-warp beam unwinding length consistency control method, comprising the following specific steps:

[0013] 1) Numbering a plurality of warp beams in sequence as 1, 2, 3, ..., N;

[0014] 2) Set the warp beam unwinding number detection cycle Y t , record the system time as t, record the time when the warp beam starts to unwind as t=0, and the value of t increases by 1 every time γt passes. Count the total number of unwinding turns of each warp beam at the end of each detection cycle and the outer diameter D of the yarn roll on each warp beam i (t) and record and store them;

[0015] 3) Setting a braking force control parameter Δs, wherein the braking force control parameter represents a minimum step length of the braking force of the sizing machine warp frame braking force control module for each adjustment;

[0016] 4) Setting the braking force control cycle Δt, the braking force control cycle represents the period of the system outputting the adjustment command to the sizing machine warp frame braking force control module, Δt is γ t An integer multiple of and the multiple is greater than 3; starting from the time t=0 when the warp beam starts to unwind, steps 5)-9) are executed once every braking force control cycle Δt;

[0017] 5) Let the current time be t d , for all the warp axes numbered i=1, 2, 3, ..., N, calculate their d All the times up to t = 0, 1, 2, 3, ..., t d Unwind to Unwound length during winding

[0018]

[0019] 6) For all the warp axes numbered i=1, 2, 3, ..., N, calculate their d All the times up to t = 0, 1, 2, 3, ..., t d Deviation of unwound length at

[0020]

[0021] in:

[0022]

[0023] 7) The number of turns of the unwound warp yarn on the warp beam is the independent variable, according to the deviation of the unwinding length of each warp beam at each time Calculate them at the current time t d Gradient of the deviation of the unwound length of each warp beam

[0024]

[0025] Where Δw t，i (t d ) is the gradient of the unwound length deviation of the i-th warp beam at the current time t d The circle calculation window is as follows:

[0026] Δw t，i (t d )=πD i (t d ) / Δl t

[0027] Δl t is the length window of gradient calculation, which is determined based on experience and has a value range of [0.01, 50] m.

[0028] 8) The number of turns of the unwound warp yarn on the warp beam As the independent variable, calculate at the current time t d Accumulation of unwinding length deviations on each warp beam 3

[0029]

[0030] Where Δw l，i (t d ) is the i-th warp axis at the current time t d The calculation window of the accumulated number of turns of the unwinding length deviation is as follows:

[0031] Δw l，i (t d )=πD i (t d ) / Δl l

[0032] Δl l is the length window of the cumulative calculation, which is determined based on experience and has a value range of [0.01, 50] m;

[0033] 9) For all warp axes numbered i=1, 2, 3, ..., N, at the current time t d To ensure the highest consistency of the unwound length of all warp beams, the control values ​​are set as follows:

[0034]

[0035] Will s i (t d) is rounded to an integer multiple of Δs, and a control signal is sent to the warp beam end brake numbered i to adjust the brake force to s i (t d ) / Δs steps, where K, T l , T t It is the system control parameter.

[0036] As a preferred solution, the control method further comprises the following steps:

[0037] 10) Set the upper limit of the control amount s max and lower limit -s min , when the control quantity is greater than s max When the control amount is adjusted to s max ; When the control amount is less than -s min When the control amount is adjusted to -s min .

[0038] As a preferred solution, the gradient calculation window Δw t，i (t d ) and the cumulative calculation window Δw l，i (t d ), all follow The change relationship is to always satisfy that the warp length corresponding to the window remains unchanged.

[0039] As a preferred embodiment, in step 2), the number of turns of the warp beam i during unwinding is The rotation detection module is used to detect the warp beam i on the warp beam frame; the outer diameter D of the yarn roll on the warp beam i (t) is obtained by detecting the outer diameter of the yarn roll; the rotation speed detection module is any one of a Hall sensor, a magnetoelectric sensor, a magnetoresistive sensor, and an encoder; the outer diameter detection module of the yarn roll is a laser rangefinder or a photoelectric rangefinder.

[0040] The beneficial effects of the present invention are as follows: the present invention calculates the length of the unwound yarn on each warp beam by real-time monitoring of the outer diameter of the yarn roll on each warp beam and the number of unwinding turns of each warp beam during the unwinding process, and timely adjusts the braking force of the warp beam according to the unwinding length deviation of the unwound warp yarn on each warp beam, so that the unwinding length deviation rate of the unwound warp yarn on each warp beam fluctuates within a very small range, so that the unwinding amount of the warp yarn on each warp beam can be controlled to remain basically consistent, the goal of synchronous unwinding can be achieved, and the problem of inaccurate control of the tension of each warp yarn during the unwinding process can be solved. Since the braking force of the warp beam is continuously adjusted during the unwinding process, the cumulative error generated by any warp beam in one adjustment cycle during the production process will be corrected in the next or next few cycles, thus avoiding the continuous expansion of the cumulative error. Under the premise that the initial warp yarn lengths on each warp beam are consistent, the problem of waste of resources caused by a large amount of residual warp yarn on some warp beams at the end of the production batch can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0042] Figure 1 It is the control principle diagram of the present invention;

[0043] Figure 2 It is a schematic diagram of the working state of the revolution detection module;

[0044] Figure 3 It is a schematic diagram of the working status of the outer diameter detection module;

[0045] Figure 1 to Figure 3 In: 1. Control module, 2. Storage module, 3. Warp beam, 4. Outer diameter detection module, 5. Warp beam frame, 6. Speed ​​detection module, 7. Brake, 8. Braking force adjustment module, 9. Yarn roll, 10. Brake wheel. DETAILED DESCRIPTION

[0046] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0047] Embodiment 1:

[0048] like Figure 1 to Figure 3The non-contact multi-warp beam unwinding length intelligent control device of the non-contact sizing machine shown includes a control module 1, a storage module 2, six yarn roll 9 outer diameter detection modules 4 corresponding to the warp beams 3 on the warp beam frame 5, six rotation detection modules 6 corresponding to the warp beams 3 on the warp beam frame 5, six brakes 7 corresponding to the warp beams 3 on the warp beam frame 5, and a braking force adjustment module 8 corresponding to the brake 7. The control module 1 is connected to the storage module 2 in communication, the yarn roll 9 outer diameter detection module 4 and the rotation detection module 6 are electrically connected to the control module 1 respectively, the brake 7 is connected to the end of the warp beam 3 in one-to-one correspondence and is fixedly connected to the warp beam frame 5 where the warp beam 3 is located, the braking force adjustment module 8 is connected to the brake 7 to adjust the braking force of the brake 7, and the braking force adjustment module 8 is also connected to the control module 1 and controlled by the control module 1. The control module 1 can be a single-chip microcomputer or an industrial computer.

[0049] When the yarn on any warp beam 3 is unwound, the outer diameter detection module 4 and the rotation speed detection module 6 corresponding to the warp beam 3 start working, regularly detect the outer diameter of the yarn roll 9 and the number of turns of the warp beam 3, and send the data to the control module 1. After receiving the information, the control module 1 calculates the length of the unwound warp yarn, numbers it and sends it to the storage module 2 for storage. According to the preset program, the control module 1 will periodically call the unwinding data of the yarn on each warp beam 3 in the storage module 2, and calculate the error of the unwound yarn length on each warp beam 3, and calculate the braking force of the brake 7 corresponding to each warp beam 3 in the next cycle according to the error size, and then control the braking force adjustment module 8 to operate and adjust the braking force of the brake 7 to eliminate the error of the unwound yarn length on the warp beam 3. The specific control method can be found in the following embodiment 2.

[0050] In this embodiment, the connection method between the warp beam 3 and the brake 7 belongs to the conventional technology in the field, and reference can be made to the warp beam brake structure disclosed in the utility model patent with patent number "202022650403.4".

[0051] like Figure 2 and Figure 3 As shown, in this embodiment, the outer diameter detection module 4 is a laser rangefinder or a photoelectric rangefinder. The outer diameter detection module 4 is fixedly connected to the warp shaft frame 5 so that the outer diameter detection module 4 is perpendicular to the warp shaft 3. The diameter change data of the yarn roll 9 is detected during the rotation of the warp shaft 3 on the warp shaft frame 5 and sent to the control module 1. After being processed by the control module 1, the data is stored in the storage module 2.

[0052] In this embodiment, two laser rangefinders are preferably used as the outer diameter detection module 4. Figure 2 and Figure 3As shown, when installing the laser rangefinder, the two laser rangefinders are symmetrically arranged on both sides of the warp axis, and the two laser rangefinders are both arranged at a fixed position along the radial direction of the corresponding warp axis 3. When the warp axis 3 is not installed, the two laser rangefinders can detect the distance between the two laser rangefinders by shooting at each other. After the warp axis 3 is installed, the two laser rangefinders respectively detect the distance from each other to the surface of the yarn roll on the warp axis 3. The control module 1 subtracts the distance from the two laser rangefinders to the surface of the yarn roll from the distance between the two laser rangefinders to obtain the outer diameter of the yarn roll.

[0053] like Figure 2 As shown, the speed detection module 6 in this embodiment is any one of a Hall sensor, a magnetoelectric sensor, and a magnetoresistive sensor. Any speed detection module 6 is fixedly connected to one end of the warp shaft frame 5, detects the number of unwinding cycles of the corresponding warp shaft 3 on the warp shaft frame 5 and sends it to the control module 1.

[0054] When the outer diameter of the yarn roll 9 is known and the number of unwinding turns of the yarn roll is detected, it is possible to calculate how much length of yarn has been unwound from the warp beam 3 .

[0055] The brake 7 used in this embodiment is a piston brake, and the braking force adjustment module 8 is a proportional valve connected to the hydraulic oil circuit or the air circuit.

[0056] A brake wheel 10 is sleeved on the shaft head of the warp beam 3, and the brake 7 is sleeved on the brake wheel 10. When the brake force adjustment module 8 increases the brake force of the brake 7, the friction force applied by the brake 7 on the brake wheel 10 increases, and the rotation of the brake wheel 10 becomes more difficult, and the unwinding speed of the warp yarn will slow down. On the contrary, the unwinding speed of the warp yarn will speed up.

[0057] In this embodiment, the length of the unwound yarn on each warp beam 3 is monitored by the control module 1, the outer diameter detection module 4 and the rotation number detection module 6, and then the control module 1 periodically adjusts the braking force adjustment module 8 on each warp beam 3 according to a preset program to adjust the unwinding speed of each warp beam 3, thereby eliminating the length deviation of the unwound warp yarn on each warp beam 3 and making each warp beam 3 unwind synchronously. The specific control method of the unwinding process by the control module 1 is explained in detail through the following embodiment 2.

[0058] Embodiment 2:

[0059] refer to Figure 1 to Figure 3 In this embodiment, six warp beams 3 are taken as an example to describe in detail the multi-warp beam unwinding length intelligent control device of the non-contact sizing machine.

[0060] The non-contact type sizing machine multi-warp beam unwinding length intelligent control device comprises the following specific steps:

[0061] 1) The six warp beams are numbered 1, 2, 3, 4, 5, and 6 in sequence, and a warp beam numbered i is obtained (i is any warp beam from 1 to 6). The initial lengths of the warp yarns on the six warp beams are all equal.

[0062] 2) Set the warp beam unwinding number detection cycle Y t , record the system time as t, record the time when the warp beam starts to unwind as t=0, and the value of t increases by 1 every time γt passes. Count the total number of unwinding turns of each warp beam at the end of each detection cycle and the outer diameter D of the yarn roll on each warp beam i (t) and record and store. In this embodiment, the value of Yt is 1s. The non-contact sizing machine multi-warp beam unwinding length intelligent control device described in the above embodiment 1 can be used to implement this step.

[0063] 3) Setting the braking force control parameter Δs, the braking force control parameter represents the minimum step length of the braking force of the sizing machine warp frame braking force control module each time. In this embodiment, it is the air pressure of the braking force air pressure valve or proportional valve, and the value is 0.1 kPa.

[0064] 4) Setting the braking force control cycle Δt, the braking force control cycle represents the period of the system outputting the adjustment command to the sizing machine warp frame braking force control module, Δt is γ t The integral multiple of Δt is greater than 3. In this embodiment, Δt is 10s. Starting from the time t=0 when the warp beam starts to unwind, every time a braking force control cycle Δt, i.e., 10s, steps 5)-9) are executed once;

[0065] 5) Let the current time be t d , for all the warp axes numbered i=1, 2, 3, ..., 6, calculate their d All the times up to t = 0, 1, 2, 3, ..., t d Unwind to Unwound length during winding

[0066]

[0067] With t d = 600 as an example (in this embodiment, the unwinding number detection cycle γ t is 1s, so t d =600 means the 600th second after the warp beam starts to unwind. At this time, the number of unwinding turns of each warp beam 3 are [470.64, 459.06, 467.32, 483.68, 450.22, 484.49] respectively, and D(t) are [1197, 1206, 1243, 1175, 1152, 1203] mm respectively. They are unwound to the Unwound length during winding After calculation, it is [989.69, 983.78, 1001.73, 1025.04, 993.51, 1042.93].

[0068] Using the same method, we can find the d =599, 598, 597, ..., 591 Since Δt is 10s, γ t The value is 1s, so the control force of the brake 7 of each warp beam 3 is adjusted at t = 600, 590, 580, 570, ..., 10, and the detection cycle γ of each unwinding circle number during the unwinding process of any warp beam 3 t The number of unwinding turns of the warp beam 3 will be detected According to the above formula, the corresponding Therefore, at t = 600, 599, 598, ..., 10 The values ​​are calculated and recorded in the storage module 2.

[0069] 6) For all the warp axes numbered i=1, 2, 3, ..., 6, calculate their d All the times up to t = 0, 1, 2, 3, ..., t d Deviation of unwound length at

[0070]

[0071] in:

[0072]

[0073] 7) The number of turns of the unwound warp yarn on each warp beam 3 is the independent variable, according to the unwinding length deviation of each warp beam 3 at each time Calculate them at the current time t d Gradient of the unwinding length deviation of each warp beam 3

[0074]

[0075] Where Δw t，i (t d ) is the gradient of the unwound length deviation of the i-th warp beam at the current time t d The circle calculation window is as follows:

[0076] Δw t，i (t d )=πD i(t d ) / Δl t

[0077] Δl t is the length window of gradient calculation, which is determined based on experience and has a value range of [0.01, 50] m.

[0078] 8) The number of turns of the unwound warp yarn on the warp beam As the independent variable, calculate at the current time t d Accumulation of unwinding length deviations on each warp beam 3

[0079]

[0080] Where Δw l，i (t d ) is the i-th warp axis at the current time t d The calculation window of the accumulated number of turns of the unwinding length deviation is as follows:

[0081] Δw l，i (t d )=πD i (t d ) / Δl l

[0082] Δl l is the length window of the cumulative calculation, which is determined based on experience and has a value range of [0.01, 50] m;

[0083] With t d = 600 as an example, at this time, the average unwinding length of each warp beam 3 It can be calculated to be 1006.11m, from which the unwinding length deviation of each warp beam 3 can be calculated is [-16.42, -22.33, -4.38, 18.93, -12.60, 36.82].

[0084] Taking the warp axis i=4 as an example, at t=580, 581, 582, ..., 600, The values ​​of are shown in Table 1.

[0085] In this embodiment, the length window Δl of the gradient calculation is t Set it to 0.9m, and we can find Δw t，i (600) is [4.18, 4.21, 4.34, 4.10, 4.02, 4.20]. The absolute value internal value calculation results are shown in Table 1, and the value of k1 is 592 and the value of k2 is 596. Substituting The calculation formula is The value of is -0.3684.

[0086] The length window Δl of the cumulative calculation l Set it to 0.9m, and we can find Δw l，i (600) is [4.18, 4.21, 4.34, 4.10, 4.02, 4.20]. The absolute value calculation results are shown in Table 1, and the value of k is 592. Substituting The calculation formula is The value of is 2.3487.

[0087] Table 1:

[0088]

[0089] Similarly, t can be calculated d The remaining warp axis 3

[0090] In this embodiment, the data in Table 1 are omitted because t d The amount of data from the 0th to the 600th is too large, so according to the actual values ​​of k, k1 and k2, a total of 21 data information are retained, and the omitted data information will not cause the clear expression of the technical solution of the present invention.

[0091] 9) For all warp axes numbered i=1, 2, 3, ..., 6, at the current time t d To ensure the highest consistency of the unwound length of all warp beams, the control values ​​are set as follows:

[0092]

[0093] Will s i (t d ) is rounded to an integer multiple of Δs, and a control signal is sent to the braking force adjustment module 8 of the brake 7 at the end of the warp beam 3 numbered i to adjust the braking force of the brake 7 to s i (t d ) / Δs steps, where K, T l , T t is the system control parameter, and its value range is [0, 10 5 ]; In this embodiment, K is set to 0.5, T l The value is 10, T t The value is 100.

[0094] In order to ensure that there is no sudden change in tension, this embodiment sets an upper limit of the control amount s max and lower limit -smin , when the control quantity is greater than s max When the control amount is adjusted to s max ; When the control amount is less than -s min When the control amount is adjusted to -s min In this embodiment, the upper limit of the control amount s max 15kPa, lower limit of control amount -s max It is -15kPa.

[0095] With t d Taking the data when =600 as an example, taking the warp beam with i=4 as an example, the value of s4(600) is 2.7885, which is rounded to an integer multiple of 0.1 kPa, which is 2.8. Within the range of the upper and lower limits of the control amount, when the warp beam 3 with number i=4 is unwound to the 600th second, the control module 1 sends a signal to the braking force adjustment module 8, and the braking force of the brake 7 is increased by 2.8 kPa through the braking force adjustment module 8.

[0096] Using the same method, the control quantity s of all weaving beams can be obtained i (t d ), and adjust the braking force of each warp beam 3 in the above manner. Finally, this embodiment adopts this method to effectively control the remaining yarn amount of each warp beam 3 to less than 50m, effectively reducing yarn loss, and ensuring the tension balance between each yarn during the warp unwinding process.

[0097] In this embodiment, in step 2), the number of turns of the warp beam i during unwinding is The rotation number detection module 6 is used to detect the warp beam i on the warp beam frame 5; the outer diameter D of the yarn roll on the warp beam i i (t) is obtained by detecting the outer diameter of the yarn roll; the rotation speed detection module is any one of a Hall sensor, a magnetoelectric sensor, a magnetoresistive sensor, and an encoder; the outer diameter detection module of the yarn roll is a laser rangefinder or a photoelectric rangefinder.

[0098] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A non-contact sizing machine multi-beam unwinding length intelligent control method, characterized in that: The specific steps include: 1) Numbering multiple warp beams in sequence as 1, 2, 3, ..., N; 2) Set the warp beam unwinding number detection cycle Y t , record the system time as t, record the time when the warp beam starts to unwind as t=0, and the value of t increases by 1 every time γt passes. Count the total number of unwinding turns of each warp beam at the end of each detection cycle. and the outer diameter D of the yarn roll on each warp beam i (t) and record and store; 3) Setting a braking force control parameter Δs, where the braking force control parameter represents the minimum step length of the braking force of the sizing machine warp frame braking force control module each time; 4) Set the braking force control cycle Δt, which represents the period of the system outputting the adjustment command to the sizing machine warp frame braking force control module. Δt is γ t An integer multiple of the multiple is greater than 3; starting from the time t = 0 when the warp beam starts to unwind, steps 5)-9) are executed once every time a braking force control cycle Δt passes; 5) Let the current time be t d , for all the warp axes numbered i=1, 2, 3, ..., N, calculate their d All the times up to t=0,1,2,3,...,t d Rewind to the Unwound length during winding 6) For all the warp axes numbered i=1, 2, 3, ..., N, calculate their d All the times up to t=0,1,2,3,...,t d Deviation of unwound length in: 7) The number of turns of unwound warp yarn on the warp beam is the independent variable, according to the deviation of the unwound length of each warp beam at each moment Calculate them at the current time t d Gradient of the deviation of the unwound length of each warp beam where Δw t，i (t d ) is the gradient of the unwound length deviation of the i-th warp beam at the current time t d The circle calculation window is as follows: Δw t，i (t d )=πD i (t d ) / Δl t Δl t The length window of gradient calculation is determined based on experience, and the value range is [0.01, 50]m; 8) The number of turns of unwound warp yarn on the warp beam As the independent variable, calculate at the current time t d The accumulation of the unwound length deviation on each warp beam 3 where Δw l，i (t d ) is the i-th warp axis at the current time t d The calculation window of the accumulated number of turns of the unwound length deviation is as follows: Δw l，i (t d )=πD i (t d ) / Δl l Δl l The length window of the cumulative calculation is determined based on experience and the value range is [0.01, 50]m; 9) For all warp axes numbered i=1, 2, 3, ..., N, at the current time t d To ensure the highest consistency of the unwound length of all warp beams, the control values ​​are set as follows: Will s i (t d ) is rounded to an integer multiple of Δs, and a control signal is sent to the warp beam end brake numbered i to adjust the brake force to s i (t d ) / Δs steps, where K, T l , T t It is the system control parameter.

2. The non-contact sizing machine multi-beam unwinding length intelligent control method according to claim 1 is characterized in that: The following steps are also included: 10) Set the upper limit of the control amount s max and lower limit -s min , when the control quantity is greater than s max When the control amount is adjusted to s max ; When the control amount is less than -s min When the control amount is adjusted to -s min .

3. The method for intelligently controlling the unwinding length of multiple warp beams of a non-contact sizing machine according to claim 1, characterized in that: The gradient calculation window Δw t，i (t d ) and the cumulative calculation window Δw l，i (t d ), all followed by The change relationship is to always satisfy that the warp length corresponding to the window remains unchanged.

4. The method for intelligently controlling the unwinding length of multiple warp beams of a non-contact sizing machine according to claim 1, characterized in that: In step 2), the number of turns made by the warp beam i during unwinding is The rotation number detection module is used to detect the warp beam i on the warp beam frame; the outer diameter D of the yarn roll on the warp beam i (t) is obtained by detecting the outer diameter of the yarn roll; the number of revolutions detection module is any one of a Hall sensor, a magnetoelectric sensor, a magnetoresistive sensor, and an encoder; the outer diameter of the yarn roll detection module is a laser rangefinder or a photoelectric rangefinder.

5. The method for intelligently controlling the unwinding length of multiple warp beams of a non-contact sizing machine according to claim 1, characterized in that: The method is implemented based on a non-contact sizing machine multi-warp beam unwinding length intelligent control device, which includes a control module (1), a storage module (2), a plurality of yarn roll outer diameter detection modules (4) corresponding one-to-one to the warp beams (3) on the warp beam frame (5), a plurality of rotation number detection modules (6) corresponding one-to-one to the warp beams (3) on the warp beam frame (5), a plurality of brakes (7) corresponding one-to-one to the warp beams (3) on the warp beam frame (5), and brakes (7) corresponding one-to-one to the brakes (7). A braking force regulating module (8) is provided. The control module (1) and the storage module (2) are communicatively connected. The yarn roll outer diameter detection module (4) and the rotation number detection module (6) are electrically connected to the control module (1) respectively. The brake (7) is connected to the end of the warp beam (3) in a one-to-one correspondence and is fixedly connected to the warp beam frame (5) where the warp beam (3) is located. The braking force regulating module (8) is connected to the brake (7) to adjust the braking force of the brake (7). The braking force regulating module (8) is also connected to the control module (1) and is controlled by the control module (1).

6. The method for intelligently controlling the unwinding length of multiple warp beams of a non-contact sizing machine according to claim 5, characterized in that: The yarn roll outer diameter detection module (4) is a laser rangefinder or a photoelectric rangefinder. The yarn roll outer diameter detection module (4) is fixedly connected to the warp beam frame (5) so that the yarn roll outer diameter detection module (4) is perpendicular to the warp beam (3). The yarn roll (9) diameter data is detected during the rotation of the warp beam (3) on the warp beam frame (5) and sent to the control module (1). After being processed by the control module (1), the data is stored in the storage module (2).

7. The method for intelligently controlling the unwinding length of multiple warp beams of a non-contact sizing machine according to claim 5, characterized in that: The rotation detection module (6) is any one of a Hall sensor, a magnetoelectric sensor, and a magnetoresistive sensor. Any rotation detection module (6) is fixedly connected to one end of the warp beam frame (5), detects the number of turns of the corresponding warp beam (3) unwound on the warp beam frame (5), and sends the result to the control module (1).

8. The method for intelligently controlling the unwinding length of multiple warp beams of a non-contact sizing machine according to claim 5, characterized in that: The brake (7) is a piston brake, and the braking force adjustment module (8) is a proportional valve connected to a hydraulic oil circuit or an air circuit.

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