CN1739945A - Polymer photon crystal fiber drawing tower control system and method - Google Patents
Polymer photon crystal fiber drawing tower control system and method Download PDFInfo
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- CN1739945A CN1739945A CN 200510086479 CN200510086479A CN1739945A CN 1739945 A CN1739945 A CN 1739945A CN 200510086479 CN200510086479 CN 200510086479 CN 200510086479 A CN200510086479 A CN 200510086479A CN 1739945 A CN1739945 A CN 1739945A
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Abstract
The present invention belongs to the field of photon crystal fiber making technology. The polymer photon crystal fiber drawing tower control system includes main control computer, high speed device for measuring fiber diameter, and low speed device for measuring furnace temperature and controlling furnace temperature and step motor speed. After the real-time fiber diameter is measured, the main control computer obtains the rotation speed controlling value by means of the fiber diameter-rotation speed list and feeds the value to the MCU in the low speed device for controlling the rotation speed of the step motor. After the real-time furnace temperature is measured, the main control computer controls the adjustable power source via MCU to regulate the current through the resistive wire and control the furnace temperature in the preset value. The present invention makes it possible to draw polymer photon crystal fiber of diameter as small as 100 micron and with diameter error within 5 micron.
Description
Technical field
The invention belongs to photonic crystal fiber manufacturing equipment field.
Background technology
Polymer photon crystal fiber is the new polymers optical fiber along the air small structure of shaft axis of optic fibre extends parallel that a kind of covering has periodic arrangement.Because the polymer photon crystal fiber structure is meticulous, the manufacturing technology complexity, therefore present polymer optical fiber drawing device can't accurately be controlled the temperature and the speed of drawing when the drawn polymer photonic crystal fiber, can't guarantee the architectural feature of the photonic crystal fiber that draws out.We have developed polymer photon crystal fiber drawing tower at this point, and make complex control system and the control method thereof that merges sensing and be controlled to be one according to the needs that draw photonic crystal fiber, make the drawn polymer photonic crystal fiber become possibility.
Summary of the invention
The present invention proposes a kind of control system and control method thereof of novel drawn polymer fiber drawing tower.
Described polymer photon crystal light wire-drawer-tower control system is characterized in that, contains the main control computer, low-speed device and high-speed equipment, wherein:
The main control computer is controlled described low-speed device and high-speed equipment;
Low-speed device comprises:
MCU adopts the C8501F021 chip, is provided with USB interface and serial line interface RS232, links to each other with described each the corresponding interface of main control computer;
Heating-furnace temperature sensor and temperature sensor pass through signal processing circuit respectively successively, and each respective end of A/D converter and MCU links to each other;
Control the hot water radiation wire of furnace temp and control the variable voltage source that flows through size of current in this hot water radiation wire, this variable voltage source links to each other with the corresponding output end of described MCU through behind D/A converter;
Stepper motor of adjustable drawing speed (1) and stepper motor (2), described stepper motor (1) links to each other with the dual serial interface RS232 of described MCU respectively with (2); The rotating speed of each stepper motor is accepted host computer control by serial ports through MCU;
High-speed equipment comprises:
DSP, 56800 chips of employing Motorola link to each other with another serial line interface RS232 of described main control computer;
CCD fibre diameter measuring appliance adopts the TCD1305P charge-coupled image sensor of Toshiba, and this CCD fibre diameter measuring appliance links to each other with the corresponding input/output end port of described DSP;
In described main control computer, be provided with: furnace temperature of heating furnace setting value, the rotating speed controlling value table of comparisons of fibre diameter setting value and fibre diameter value and stepper motor (1) and stepper motor (2).
Described polymer photon crystal fiber drawing tower wire drawing control method is characterized in that this control method contains following steps successively:
Step 1: the main control computer initialization, set: furnace temperature of heating furnace setting value, fibre diameter setting value and fibre diameter and the stepper motor rotating speed controlling value table of comparisons;
Step 2: described main control computer is respectively MCU and the DSP communication frequency of setting up serial ports, and be that MCU sets: the furnace temperature of heating furnace initial value is that DSP sets the fibre diameter initial value;
Step 3: heating-furnace temperature sensor and temperature sensor are handled furnace temperature and room temperature respectively through signal, be sent to described MCU after mould/transformation of variables, and this MCU gives described main control computer described each temperature value by serial ports; Simultaneously current stepper motor tachometer value is delivered to the main control computer;
Step 4:CCD fibre diameter measuring appliance is sent to described DSP to the fibre diameter figure that records, and this DSP handles image, obtains the fibre diameter value, delivers to described main control computer;
Step 5: described main control computer compares current furnace temperature temperature value and the furnace temperature value that sets, and obtains temperature difference; Simultaneously, obtain stepper motor rotating speed controlling value from current fibre diameter value, this rotating speed controlling value with obtain the rotating speed difference after the current tachometer value of stepper motor is compared and show;
Step 6: the temperature difference that described main control computer obtains according to step 5, speed discrepancy calculate stepper motor tachometer value and the heating furnace regulated power supply controlling value that makes new advances and deliver to described MCU;
Step 7: after the heating furnace regulated power supply controlling value that described MCU is sent here by serial line interface by described main control computer according to step 6, regulate controllable voltage source, change the temperature of hot water radiation wire, thereby furnace temperature of heating furnace is transferred to setting value by D/A;
Step 8: after the corresponding stepper motor rotating speed of the fibre diameter controlling value that described MCU is sent here by serial line interface by described main control computer according to step 6, stepper motor is adjusted to this tachometer value;
Step 9: repeating step 3～step 8 stops when fibre diameter is stretched to setting value.
Polymer photon crystal fiber drawing tower can draw that diameter is minimum be the polymer photon crystal fiber of 100um under the Comprehensive Control of this control system and control method thereof, and fluctuating is less than being 5um.
Description of drawings
Fig. 1 control system connection diagram;
Fig. 2 MCU control flow chart;
Fig. 3 DSP control flow chart;
Fig. 4 host software flow chart;
Fig. 5 polymer photon crystal fiber example cross section figure;
Fig. 6 polymer photon crystal fiber leads to the light schematic diagram.
The specific embodiment
The present invention has designed a kind of new type of polymer fibre-optical drawing tower control system and control method thereof.
Under the effect of this control system and control method thereof, this polymer optical fiber wire-drawer-tower not only can draw common polymer optical fiber, and can the drawn polymer photonic crystal fiber.
The control section of wire-drawer-tower comprises hardware system and software systems.The composition of hardware system and connected mode as shown in Figure 1, hardware system is carried out comprehensively as main frame by a computer.Host computer control low speed part and high speed part.Low speed partly comprises low speed control MCU, furnace temperature and temperature sensor, stepper motor 1 and 2, variable voltage source and resistive heater.MCU adopts the C8051F021 chip, and temperature sensor adopts thermocouple, adopts the RS232 interface communication between MCU and the stepper motor driver, and MCU is by the regulated power supply of DA control heating furnace, and MCU and host communication adopt the RS232 interface, and USB interface is adopted in debugging.At a high speed the core of part is DSP, adopts 56800 of Motorola, and CCD adopts the TCD1305P of Toshiba, and DSP accepts the control signal of main frame and returns the diameter value that records, and adopts RS232 to communicate by letter between DSP and main frame.Its temperature controlled principle is: the temperature in the heating furnace that obtains by thermocouple through temperature transmitter carry out that signal amplifies and linear process after, obtain the voltage signal of 0-2V.And then voltage signal delivered to A/D converter, and the analog quantity of reflection furnace temperature height is converted to digital quantity, convert to then and degree centigrade give main frame through MCU, main frame judges how to adjust temperature according to the temperature value of this moment.The adjustment of temperature is just opposite with testing process, is carried out by the digital quantity of required adjustment by host notification MCU.The digital quantity of MCU adjusted value is passed to D/A converter, controls the power output of regulated power supply through the direct current signal that is varied to 0-5V after amplifying.Step motor control partly adopts the WM224M two-phase hybrid stepping motor driver of white mountain electromechanics, the highest 64 segmentations, and highest response frequency 200Kps has the good data interface, accepts MCU control.The diameter of optical fiber after the fibre diameter measurement device is used for measuring and stretches, fibre diameter value after the measurement is exported main frame through DSP, main frame is tested the fibre diameter and the drawing-off motor speed table of comparisons after the drawing-off that obtains by inquiry, the diameter measurement value can be converted to velocity amplitude, the speed feedback value of this velocity amplitude and motor speed control system obtains deviate after relatively, revise drawing speed according to this value, guarantee that the polymer optical fiber diameter that draws out is even.
Software section is realized temperature control, communication protocol, drawing speed control.Communication protocol has been stipulated the long-range form of accepting host command of hardware system, its dedicated algorithms is adopted in temperature control and drawing speed control, control heating, sensing and wire drawing relevant devices realize heated at constant temperature and evenly wire drawing, with the polymer optical fiber quality that guarantees to draw.Software section is by MCU, and the algorithm in the DSP and the control software of main frame constitute.
In the MCU algorithm flow as shown in Figure 2, each module of the first initialization in back that powers on is given the fixed temperature initial value, the temperature initial value decide according to material, it is 115200bps that the serial communication frequency is set, and waits for that then serial communication interrupts, judgement interrupt type after interrupting arriving.Interrupt if receive, then accept data, judge the data type that receives.If invalid data then returns wait, if valid data judgment data type then.Send to main frame if the calculated signals that data transmission order is then returned from temperature sensing circuit goes out temperature value and sends interruption by serial ports, enter the Next Command state of waiting for then.The signal value Temp1 that temperature sensing circuit returns is 0～65536 integer, its be converted into temperature T (℃) formula be:
T＝Temp1*0.01220703125 (1)
If the step motor control order that main frame sends then directly changes the rotating speed of stepper motor according to the numerical value in the order, return wait then.If the temperature control command then rewrite earlier temperature control variables Temp2 (℃), calculate the output voltage U (V) of DA according to this variable, return wait then, its computing formula is:
U＝Temp2/44 (2)
In the DSP algorithm flow as shown in Figure 3, each module of the first initialization in back that powers on, it is 115200bps that the serial communication frequency is set, and waits for communication disruption then.After interrupting arrival, judge interrupt type, receive if accept to interrupt then changing over to data, if receive invalid data then return wait, if valid data then extract diameter value d (μ m), interrupt carrying out data by serial ports then and send, be sent completely the back and continue to wait for.Diameter value d obtains by the processing to the CCD pixel value, Processing Algorithm is as follows: at first obtain current C CD pixel value matrix, do difference then, difference result is carried out smoothing processing, the place to go burr carries out searching of extreme point then, and the difference of two extreme point coordinates the most tangible that find is exactly the diameter d of optical fiber.
Host software calculates the standard that whether reaches according to current fibre diameter, and stepper motor is carried out the speed adjustment, and heating-up temperature is adjusted, and makes fibre diameter reach required standard, and its flow chart as shown in Figure 4.After software brings into operation, carry out initialization earlier, fibre diameter is set as required, the heating-up temperature equivalence, the pid algorithm coefficient, it is 115200bps that the serial communication frequency is set, and begins then to send data demand and control command, waits pending data to return.Have no progeny when the data of returning cause in the serial ports, return data is received, judge the return data type, if invalid data then carries out new once transmission data demand and control command, if valid data are then stored current data.The target data of current data and setting is compared, if meet then enter the data demand of next round and control command sends.If do not meet then calculate this temperature output valve u according to the pid algorithm formula
i, calculate the motor speed value according to formula (4).
This temperature output valve u
iComputing formula is:
U wherein
iBe this temperature output valve, u
I-1Temperature output valve for last time; Δ e
iFor last time sampled value with the setting value poor; Δ
2e
iFor last last time sampled value with the setting value poor; P, I, D are respectively ratio, integration, differential coefficient, for through repeatedly testing the setting value of determining.
This motor speed value computing formula is as follows:
V
i＝V
i-1+V
0(Δd
i/D) (4)
V wherein
iThis motor speed output valve, V
I-1Be motor speed value last time, V
0Be the motor speed preset value, Δ d
iPoor for current measurement diameter value and standard value, D is the diameter standard value.
When system starts host computer control each several part initializing set initial value, then the temperature in the heating furnace that obtains by thermocouple through temperature transmitter carry out that signal amplifies and linear process after, obtain the voltage signal of 0-2V.And then voltage signal delivered to A/D converter, and the analog quantity of reflection furnace temperature height is converted to digital quantity, give MCU then, MCU gives main frame by serial ports with temperature value.CCD measuring optical fiber diameter is given DSP image, obtains diameter value after DSP handles and gives main frame then.Main frame calculates next step temperature value and motor speed value according to current diameter value, temperature value and motor speed value, sends to that MCU controls heating power supply respectively then and stepper motor is adjusted, thereby guarantees that the polymer optical fiber diameter that draws out is even.
We adopt according to the methymethacrylate material, and setting heating-up temperature is 103 ℃, and motor speed is 1000 rev/mins, the horizontal surface chart of the polymer photon crystal fiber that draws out as shown in Figure 5, its leaded light figure is as shown in Figure 6.Airport is pressed triangular crystal lattice and is arranged.Pitch of holes (lattice paprmeter) Λ=15.3 μ m.Bore dia d=10.6 μ m, fibre diameter are 125 μ m, and maximum the fluctuating is 4.3 μ m.
Claims (2)
1. polymer photon crystal light wire-drawer-tower control system is characterized in that, contains the main control computer, low-speed device and high-speed equipment, wherein:
The main control computer is controlled described low-speed device and high-speed equipment;
Low-speed device comprises:
MCU adopts the C8501F021 chip, is provided with USB interface and serial line interface RS232, links to each other with described each the corresponding interface of main control computer;
Heating-furnace temperature sensor and temperature sensor pass through signal processing circuit respectively successively, and each respective end of A/D converter and MCU links to each other;
Control the hot water radiation wire of furnace temp and control the variable voltage source that flows through size of current in this hot water radiation wire, this variable voltage source links to each other with the corresponding output end of described MCU through behind D/A converter;
Stepper motor of adjustable drawing speed (1) and stepper motor (2), described stepper motor (1) links to each other with the dual serial interface RS232 of described MCU respectively with (2); The rotating speed of each stepper motor is accepted host computer control by serial ports through MCU;
High-speed equipment comprises:
DSP, 56800 chips of employing Motorola link to each other with another serial line interface RS232 of described main control computer;
CCD fibre diameter measuring appliance adopts the TCD1305P charge-coupled image sensor of Toshiba, and this CCD fibre diameter measuring appliance links to each other with the corresponding input/output end port of described DSP;
In described main control computer, be provided with: furnace temperature of heating furnace setting value, the rotating speed controlling value table of comparisons of fibre diameter setting value and fibre diameter value and stepper motor (1) and stepper motor (2).
2. polymer photon crystal fiber drawing tower wire drawing control method is characterized in that, this control method contains following steps successively:
Step 1: the main control computer initialization, set: furnace temperature of heating furnace setting value, fibre diameter setting value and fibre diameter and the stepper motor rotating speed controlling value table of comparisons;
Step 2: described main control computer is respectively MCU and the DSP communication frequency of setting up serial ports, and be that MCU sets: the furnace temperature of heating furnace initial value is that DSP sets the fibre diameter initial value;
Step 3: heating-furnace temperature sensor and temperature sensor are handled furnace temperature and room temperature respectively through signal, be sent to described MCU after mould/transformation of variables, and this MCU gives described main control computer described each temperature value by serial ports; Simultaneously current stepper motor tachometer value is delivered to the main control computer;
Step 4:CCD fibre diameter measuring appliance is sent to described DSP to the fibre diameter figure that records, and this DSP handles image, obtains the fibre diameter value, delivers to described main control computer;
Step 5: described main control computer compares current furnace temperature temperature value and the furnace temperature value that sets, and obtains temperature difference; Simultaneously, obtain stepper motor rotating speed controlling value from current fibre diameter value, this rotating speed controlling value with obtain the rotating speed difference after the current tachometer value of stepper motor is compared and show;
Step 6: the temperature difference that described main control computer obtains according to step 5, speed discrepancy calculate stepper motor tachometer value and the heating furnace regulated power supply controlling value that makes new advances and deliver to described MCU;
Step 7: after the heating furnace regulated power supply controlling value that described MCU is sent here by serial line interface by described main control computer according to step 6, regulate controllable voltage source, change the temperature of hot water radiation wire, thereby furnace temperature of heating furnace is transferred to setting value by D/A;
Step 8: after the corresponding stepper motor rotating speed of the fibre diameter controlling value that described MCU is sent here by serial line interface by described main control computer according to step 6, stepper motor is adjusted to this tachometer value;
Step 9: repeating step 3～step 8 stops when fibre diameter is stretched to setting value.
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| CNB2005100864796A CN100427296C (en) | 2005-09-23 | 2005-09-23 | Polymer photon crystal fiber drawing tower control system and method |
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| WO2013189262A1 (en) * | 2012-06-18 | 2013-12-27 | 长飞光纤光缆有限公司 | Method and device for automatically controlling temperature of optical fiber coatings |
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| JP3306398B2 (en) * | 1999-11-29 | 2002-07-24 | 大日本スクリーン製造株式会社 | Substrate transfer device and transfer teaching system |
| JP4479220B2 (en) * | 2002-11-06 | 2010-06-09 | 三菱電機株式会社 | Production equipment control device, production equipment control system, and production equipment control method using production equipment control device |
| CN100565254C (en) * | 2003-03-31 | 2009-12-02 | 燕山大学 | The method for continuous production of plastics photonic crystal fiber |
| KR100547799B1 (en) * | 2003-05-29 | 2006-01-31 | 삼성전자주식회사 | Matrix for photonic crystal fiber and photonic crystal fiber using same |
| GB0317352D0 (en) * | 2003-07-24 | 2003-08-27 | Blazephotonics Ltd | Optical fibres |
| CN1267369C (en) * | 2004-05-28 | 2006-08-02 | 烽火通信科技股份有限公司 | Method for preparing photon crystal optical fibre and apparatus therefor |
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