CN104444597A - Fiber placement tension control system - Google Patents
Fiber placement tension control system Download PDFInfo
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- CN104444597A CN104444597A CN201410609019.6A CN201410609019A CN104444597A CN 104444597 A CN104444597 A CN 104444597A CN 201410609019 A CN201410609019 A CN 201410609019A CN 104444597 A CN104444597 A CN 104444597A
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Abstract
The invention provides a fiber placement tension control system. The system comprises an upper computer, a controller, an A/D converter, a D/A converter, a power amplifier, a torque motor, a fiber coil, a tension sensor and an amplifier. The system has the advantages that due to the fact that the tension controller which can control tension accurately is arranged on a fiber placement machine, efficiency and reliability of the system are guaranteed, tracking of the quality of composite material products is facilitated, and the quality of fiber products is improved; feedback type direct tension control is adopted, so that the high-strength property of fiber materials is fully utilized; the tension of multiple fibers is controlled at the same time according to tension control valve values input by the upper computer, and tension control results during fiber placement are recorded, displayed and stored in real time.
Description
Technical field
The present invention relates to the production plant field of fiber, refer to a kind of fiber placement tension control system especially.
Background technology
In the forming process of composite material, System of Filament Winding Process refers to and adopts continuous fiber after insulating varnish adhesives, be arranged on core according to certain line style is regular under tension, be then adhesives solidification by heating and make the process of definite shape.Fiber placement full name is automatic tow laying forming technology, also claims automatic fiber placement technology (Automatic Fiber Placement, AFP).This technology is 20 century 70s as the reform of Filament-wound Machine and automated tape-laying technology and the full automaticity composites processing technology grown up, and is also one of the most most effective composite material automatic forming manufacturing technology of development in recent years.Fiber placement both can spread convex surface also can spread concave surface, the bicurvature component of all right lay complexity, and there is the function of cutting tow when laying, can meet to wake up with a start laying and cut out to adapt to local and thicken, laying falls progressively and the needs of opening laying, therefore compares Filament-wound Machine technology and automated tape-laying technology has using value widely.In the forming process of composite material, reasonably control the application stress that tension force can improve fiber, give full play to the high-strength special efficacy of lamination coating
[2].Technological parameter in the final performance of composite product and its production process is closely related.When lay motor body, pressure container, the size of lay tension force, the homogeneity of the tension force between each bundle fiber and the magnitude change of each lay interlayer fiber tension are on product strength impact greatly.Research proves, tension force selects improper or tension force is unstable, can make the loss of strength 20 ~ 30% of Filament-wound Machine goods.Visible, the fiber placement machine of function admirable must mix the tension control assembly accurately controlling tension force, could provide safeguard to the high efficient and reliable of system.In order to meet the production requirement of high quality fiber goods, be studied with regard to the control method of constant-tension in fiber placement process.Therefore, develop a kind of new control system to solve the problems of the technologies described above and be significant in this area.
Summary of the invention
The defect existed for prior art and deficiency, the invention provides a kind of fiber placement tension control system, in order to adapt to the development side of intelligentized control method, make control system to integrated future development, conveniently carry out the follow-up of quality of composite product, improve fiber product quality, tension control system directly will adopt tension pick-up Real-Time Monitoring tension force, with direct current torque motor actuating unit, tension force on the resisting moment constant wind fiber provided when utilizing direct current torque motor to work, by the torque of AT89C52 Microprocessor S3C44B0X direct current torque motor, to reach the object controlling tension force.For achieving the above object, a kind of fiber placement tension control system that the present invention proposes, adopt following technical scheme, this system comprises:
Upper computer, completes the input of setting value, data processing and master control function, as computing and the control center of whole tension control system;
Controller, is used for sending out movement instruction to torque motor;
A/D converter, completes analog signal and is converted to digital signal;
D/A converter, completes digital quantity signal and converts analog signal to;
Amplifirer, brakes direct current torque motor after being amplified by voltage signal;
Torque motor is the actuating unit of control system;
Silk volume, by the object controlling to perform;
Tension pick-up, Real-Time Monitoring the tension force shown on fiber yarn;
Amplifier; For amplification and the transmission of tension signal;
Upper computer is wherein connected with controller, and controller is connected with D/A converter, and D/A converter is connected with amplifirer, and amplifirer is connected with torque motor, and torque motor is rolled up with silk and is connected; Tension pick-up is connected with amplifier, and amplifier is connected with A/D converter, and A/D converter is connected with upper computer.
For the further improvement of the technical program, described upper computer selects AT89C52 as the treater of system;
For the further improvement of the technical program, A/D converter selects AD1674 as core apparatus, and D/A converter adopts the DAC0832 of 8 as core apparatus;
For the further improvement of the technical program, the strain and stress that tension pick-up directly adopts resistance-strain silk, sheet carrys out determination object;
The principle of work of equipment of the present invention is mainly: what a whole set of tension control system was carried out is that closed loop feedback controls.During system cloud gray model, first by tension pick-up Real-Time Monitoring and the tension force shown on fiber thread rope, and then the tension force come by the resisting moment of control system actuating unit direct current torque motor on stable fibers cotton rope, reach constant-tension, improve the object of fiber composite materials quality.In laid course altogether, system monitors the Tensity size on fiber yarn at any time, after CPU and setting value compare calculating, by D/A, digital quantity signal converts analog signal output analog control voltage signal to, then brakes direct current torque motor after being amplified by power amplifier, allows its constant running, there is provided constant resistance distance, thus the Tensity size on stable fibers silk is to control tension force.
System CPU wherein uses AT89C52 micro controller system, program capacity 8K, and crystal oscillator uses 11Hz.This is computing and the control center of whole tension control system.AT89C52 is low voltage, high-performance CMOS 8 micro controller systems that American ATMEL is produced, sheet include 8k bytes can be repeatedly erasable Flash read-only program memory and the random access data storage (RAM) of 256bytes, powerful AT89C52 micro controller system is applicable to more comparatively complicated control application scenario.Stop the work of CPU during idle mode, but allow RAM, Timer/Counter, serial communication mouth and terminal system to work on.Preserve the content in RAM during power-down mode, but oscillator quits work and forbids other all component workings until next hardware reset.In view of above all feature performance benefits, therefore, tension control system herein selects AT89C52 as system CPU.
The communication of system adopts RS232 communication modes, and chip is MAX232.Wherein comprise the IC chip of two-way receiver and actuator, be applicable to various EIA-232 and communication interface V.29/V.24.
The A/D analog/digital conversion of system uses the inner sampling with 20KHz sampling frequency to keep chip AD1674, in conjunction with analog multichannel switch AD7501, realizes the sampling of 8 road tension force voltage signals.AD1674 is the 12 a kind of complete bit parallel analog/digital conversion monolithic integrated circuits that AD company of the U.S. releases.This chip internal carry sampling holder (SHA), 10 volts of reference voltage sources, clock source and can and microprocessor bus direct interface temporary/tristate output buffer.The inner structure of AD1674 is compact, and integrated level is high, serviceability, and especially high/low temperature stability is better, and layout board area can be made greatly to reduce, and thus can reduce costs and improve the reliability of system.In tension control system, the simulation parameter of each sensor of collection that AD1674 can be real-time, carries out data transfer pass to CPU and carry out data processing fast, accurately, thus effectively controls the accuracy of detection of whole tension control system.Just because of AD1674 has these features above, in this cover tension control system, select the core apparatus that AD1674 changes as A/D,
The D/A D/A switch of system, adopts the DAC0832 of 8, drives multiplexer (MUX respectively.DAC0832 is 8 the monolithic D/A converteies adopting CMOS technology to manufacture, primarily of two eight bit registers and 8 D/A converteies composition, use two registers, the benefit of input register and DAC register is the hardware interface circuit design that can simplify in some application.DAC0832 adopts secondary buffer mode, while output, can gather next data like this, thus improve conversion rate; The more important thing is can when multiple conv works simultaneously, and the synchronous conversion realizing multi-channel D/A exports.DAC0832 resolution bits 8; Only need adjust its linearity under full scale; Can with all micro controller systems or micro-process direct interface, also can not be connected with microprocessor and be used alone when needing; In test technology, except directly measuring except the strain and stress of test specimen with resistance-strain silk, sheet, also extensively utilize it to make various strain gauge transducer to measure various physical quantity, as moment, pressure, acceleration/accel etc., strain gauge transducer is one of current most widely used sensor.
The tension control algorithm of native system, adopts PID to control; When motor runs, adopt closed loop control, after tension force setting value compares with tension feedback value, its difference enters micro controller system, the controlling quantity that motor runs is obtained after the computing of Increment Type Digital Hydraulic pid control algorithm, export control signal by D/A conversion, revise motor output torque, realize the control to tension force.After program starts, system is monitored the tension value of tension pick-up at any time by sampling module and is shown on a display panel, upper computer sets the tension value of this passage by serial communication, PID arithmetic module is entered after system acceptance keyboard instruction, control signal is after treatment sent to D/A modular converter, produce the change of control voltage control torque motor torque, make tension value reach balance.Part crucial in control program is PID arithmetic module, and it decides the height of Systematical control precision and the speed of dynamic response.In analog control system, the Control PID that controller is conventional controls.Computer controlled is a kind of controlling of sampling, and it can only calculate controlling quantity according to the deviate of sampling instant.Therefore, Digital PID Algorithm is adopted when controlling conveyance tension.
From above embodiment of the present invention, fiber placement tension control system proposed by the invention, compared with prior art, has following advantage:
1. the tension control assembly accurately controlling tension force mixed by fiber placement machine, provides safeguard, meanwhile, conveniently carry out the follow-up of quality of composite product to the high efficient and reliable of system, improves fiber product quality,
2. because yarn during fiber placement is always in motion control, and require constant tension, therefore require that tension control system is dynamically, especially effectively tension force can be controlled in acceleration, deceleration process, namely require that system can the dynamic force moment that brings due to acceleration, deceleration and friction of accurate compensation, so adopt the reaction type tension force in directly controlling to control, to reach the object of the high-strength characteristic giving full play to lamination coating.
3. the tension force that system inputs according to upper computer controls threshold values, controls the tension force of multi-filament simultaneously, the tension force in piddler process is controlled result real time recording, display and storing.
Accompanying drawing explanation
Fig. 1 is fiber placement tension control system structural representation of the present invention; Wherein:
1-silk is rolled up, 2-tension pick-up, 3-amplifier, 4-A/D conv, 5-upper computer, 6-controller, 7-D/A conv, 8-amplifirer, 9-torque motor.
Fig. 2 is the direct current torque motor control flow schematic diagram in systems in which of native system;
Detailed description of the invention
In order to understand technology contents of the present invention better, institute accompanying drawings is coordinated to illustrate especially exemplified by specific embodiment, as shown in Figure 1, a kind of fiber placement tension control system that the present invention proposes, adopt following technical scheme, this system comprises:
Upper computer 5, completes the input of setting value, data processing and master control function, as computing and the control center of whole tension control system;
Controller 6, is used for sending out movement instruction to torque motor;
D/A converter 7, completes digital quantity signal and converts analog signal to;
A/D converter 4, completes analog signal and is converted to digital signal;
Amplifirer 8, is undertaken voltage signal amplifying rear lock torque motor 9;
Torque motor 9 is the actuating unit of control system;
Silk volume 1, by the object controlling to perform;
Tension pick-up 2, Real-Time Monitoring the tension force shown on fiber yarn;
Amplifier 3; For amplification and the transmission of tension signal;
Upper computer 5 is wherein connected with controller 6, and controller 6 is connected with D/A converter 7, and D/A converter 7 is connected with amplifirer 8, and amplifirer 8 is connected with torque motor 9, and torque motor 9 and silk are rolled up 1 and be connected; Tension pick-up 2 is connected with amplifier 2, and amplifier 2 is connected with A/D converter 4, and A/D converter 4 is connected with upper computer 5.
For the further improvement of the technical program, described upper computer 5 selects AT89C52 as the treater of system;
For the further improvement of the technical program, A/D converter 4 selects AD1674 as core apparatus, and D/A converter 7 adopts the DAC0832 of 8 as core apparatus;
For the further improvement of the technical program, tension pick-up 2 directly adopts resistance-strain silk to carry out the strain and stress of determination object.
The principle of work of equipment of the present invention is mainly: what a whole set of tension control system was carried out is that closed loop feedback controls.During system cloud gray model, first by tension pick-up Real-Time Monitoring and the tension force shown on fiber thread rope, and then the tension force come by the resisting moment of control system actuating unit direct current torque motor on stable fibers cotton rope, reach constant-tension, improve the object of fiber composite materials quality.In laid course altogether, system monitors the Tensity size on fiber yarn at any time, after CPU and setting value compare calculating, by D/A, digital quantity signal converts analog signal output analog control voltage signal to, then brakes direct current torque motor after being amplified by power amplifier, allows its constant running, there is provided constant resistance distance, thus the Tensity size on stable fibers silk is to control tension force.
System CPU wherein uses AT89C52 micro controller system, program capacity 8K, and crystal oscillator uses 11Hz.This is computing and the control center of whole tension control system.AT89C52 is low voltage, high-performance CMOS 8 micro controller systems that American ATMEL is produced, sheet include 8k bytes can be repeatedly erasable Flash read-only program memory and the random access data storage (RAM) of 256bytes, powerful AT89C52 micro controller system is applicable to more comparatively complicated control application scenario.Stop the work of CPU during idle mode, but allow RAM, Timer/Counter, serial communication mouth and terminal system to work on.Preserve the content in RAM during power-down mode, but oscillator quits work and forbids other all component workings until next hardware reset.In view of above all feature performance benefits, therefore, tension control system herein selects AT89C52 as system CPU.
The communication of system adopts RS232 communication modes, and chip is MAX232.Wherein comprise the IC chip of two-way receiver and actuator, be applicable to various EIA-232 and communication interface V.29/V.24.
The A/D analog/digital conversion of system uses the inner sampling with 20KHz sampling frequency to keep chip AD1674, in conjunction with analog multichannel switch AD7501, realizes the sampling of 8 road tension force voltage signals.AD1674 is the 12 a kind of complete bit parallel analog/digital conversion monolithic integrated circuits that AD company of the U.S. releases.This chip internal carry sampling holder (SHA), 10 volts of reference voltage sources, clock source and can and microprocessor bus direct interface temporary/tristate output buffer.The inner structure of AD1674 is compact, and integrated level is high, serviceability, and especially high/low temperature stability is better, and layout board area can be made greatly to reduce, and thus can reduce costs and improve the reliability of system.In tension control system, the simulation parameter of each sensor of collection that AD1674 can be real-time, carries out data transfer pass to CPU and carry out data processing fast, accurately, thus effectively controls the accuracy of detection of whole tension control system.Just because of AD1674 has these features above, in this cover tension control system, select the core apparatus that AD1674 changes as A/D,
The D/A D/A switch of system, adopts the DAC0832 of 8, drives multiplexer (MUX respectively.DAC0832 is 8 the monolithic D/A converteies adopting CMOS technology to manufacture, primarily of two eight bit registers and 8 D/A converteies composition, use two registers, the benefit of input register and DAC register is the hardware interface circuit design that can simplify in some application.DAC0832 adopts secondary buffer mode, while output, can gather next data like this, thus improve conversion rate; The more important thing is can when multiple conv works simultaneously, and the synchronous conversion realizing multi-channel D/A exports.DAC0832 resolution bits 8; Only need adjust its linearity under full scale; Can with all micro controller systems or micro-process direct interface, also can not be connected with microprocessor and be used alone when needing; In test technology, except directly measuring except the strain and stress of test specimen with resistance-strain silk, sheet, also extensively utilize it to make various strain gauge transducer to measure various physical quantity, as moment, pressure, acceleration/accel etc., strain gauge transducer is one of current most widely used sensor.
The direct current torque motor of native system control flow schematic diagram in systems in which as shown in Figure 2; PID is adopted to control, when motor runs, adopt closed loop control, after tension force setting value compares with tension feedback value, its difference enters micro controller system, obtains the controlling quantity that motor runs after the computing of Increment Type Digital Hydraulic pid control algorithm, exports control signal by D/A conversion, revise motor output torque, realize the control to tension force.After program starts, system is monitored the tension value of tension pick-up at any time by sampling module and is shown on a display panel, upper computer sets the tension value of this passage by serial communication, PID arithmetic module is entered after system acceptance keyboard instruction, control signal is after treatment sent to D/A modular converter, produce the change of control voltage control torque motor torque, make tension value reach balance.Part crucial in control program is PID arithmetic module, and it decides the height of Systematical control precision and the speed of dynamic response.In analog control system, the Control PID that controller is conventional controls.Computer controlled is a kind of controlling of sampling, and it can only calculate controlling quantity according to the deviate of sampling instant.Therefore, Digital PID Algorithm is adopted when controlling conveyance tension.
In sum, what this control system was carried out is that closed loop feedback controls, system is by tension pick-up Real-Time Monitoring and the tension force shown on fiber thread rope, and then the tension force come by the resisting moment of control system actuating unit direct current torque motor on stable fibers cotton rope, reach constant-tension, improve the object of fiber composite materials quality.
The present invention discloses as above by way of example, in any form the present invention be not construed as limiting and limit, scope of the present invention is as the criterion with claims, and all do not exceed the apparent amendment of present inventive concept, conversion and replacement scheme all within the scope of the present invention.
Claims (4)
1. a fiber placement tension control system, is characterized in that this system comprises:
Upper computer (5), completes the input of setting value, data processing and master control function, as computing and the control center of whole tension control system;
Controller (6), is used for sending out movement instruction to torque motor;
D/A converter (7), completes digital quantity signal and converts analog signal to;
A/D converter (4), completes analog signal and is converted to digital signal;
Amplifirer (8), is undertaken voltage signal amplifying rear lock torque motor 9;
Torque motor (9) is the actuating unit of control system;
Silk volume (1), by the object controlling to perform;
Tension pick-up (2), Real-Time Monitoring the tension force shown on fiber yarn;
Amplifier (3); For amplification and the transmission of tension signal;
Upper computer (5) is wherein connected with controller (6), controller (6) is connected with D/A converter (7), D/A converter (7) is connected with amplifirer (8), amplifirer (8) is connected with torque motor (9), and torque motor (9) is rolled up (1) and is connected with silk; Tension pick-up (2) is connected with amplifier (2), and amplifier (2) is connected with A/D converter (4), and A/D converter (4) is connected with upper computer (5).
2. fiber placement tension control system according to claim 1, is characterized in that: described upper computer (5) selects AT89C52 as the treater of system.
3. fiber placement tension control system according to claim 1, is characterized in that: described A/D converter (4) selects AD1674 as core apparatus, and described D/A converter (7) adopts the DAC0832 of 8 as core apparatus.
4. fiber placement tension control system according to claim 1, is characterized in that: described tension pick-up (2) adopts resistance-strain silk to carry out the strain and stress of determination object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410609019.6A CN104444597A (en) | 2014-11-03 | 2014-11-03 | Fiber placement tension control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410609019.6A CN104444597A (en) | 2014-11-03 | 2014-11-03 | Fiber placement tension control system |
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| CN104444597A true CN104444597A (en) | 2015-03-25 |
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| CN201410609019.6A Pending CN104444597A (en) | 2014-11-03 | 2014-11-03 | Fiber placement tension control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366436A (en) * | 2015-11-17 | 2016-03-02 | 苏州工业园区创易技研有限公司 | Tension measurement method based on servo constant-tension tensioner |
| CN110347107A (en) * | 2019-07-19 | 2019-10-18 | 苏州创易技研股份有限公司 | Tonometry monitoring management analysis system based on real-time strain measurement communication device |
-
2014
- 2014-11-03 CN CN201410609019.6A patent/CN104444597A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 孔燕: "八通道自动铺丝张力测控***方案设计", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366436A (en) * | 2015-11-17 | 2016-03-02 | 苏州工业园区创易技研有限公司 | Tension measurement method based on servo constant-tension tensioner |
| CN110347107A (en) * | 2019-07-19 | 2019-10-18 | 苏州创易技研股份有限公司 | Tonometry monitoring management analysis system based on real-time strain measurement communication device |
| CN110347107B (en) * | 2019-07-19 | 2020-09-08 | 苏州创易技研股份有限公司 | Method for controlling tension control index by tension measurement monitoring management analysis system |
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Application publication date: 20150325 |