CN104536438B - Stroboscopic theory based needle selector detecting system and method - Google Patents
Stroboscopic theory based needle selector detecting system and method Download PDFInfo
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- CN104536438B CN104536438B CN201410845228.0A CN201410845228A CN104536438B CN 104536438 B CN104536438 B CN 104536438B CN 201410845228 A CN201410845228 A CN 201410845228A CN 104536438 B CN104536438 B CN 104536438B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims description 5
- 238000013500 data storage Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000009940 knitting Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000009954 braiding Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
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- 238000004049 embossing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
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Abstract
The invention discloses a stroboscopic theory based needle selector detecting system and method. The stroboscopic theory based needle selector detecting system comprises an STM32 controlling unit, a CPLD controlling unit, an LED driving circuit and a needle selecting driving circuit. The STM32 controlling unit comprises an STM32 embedded microprocessor, a button input circuit, an adjustable potentiometer input circuit and a display module. The method comprises the steps that based on the stroboscopic theory, an LED light is selected as a light source, so that the flicker frequency of the LED light fits and is synchronized with the swing frequency of a driving needle selector cutting head. A synchronized signal serves as a standard, the LED light is lightened up again after time is delayed for delta t in the flicker cycle, and the swing frequency and the range of the needle selector cutting head are not changed, so that observation is achieved by naked eyes. Compared with the prior art, the defects that a prior detection means is low in efficiency, poor in reliability, and short of universality are overcome. By means of technology of a CPLD, the parallel processing capability is utilized to rapidly output the impulse frequency signal, the LED light and a needle selector is driven, and therefore the system stability, reliability and parallel controlling capacity are enhanced.
Description
Technical field
The invention belongs to the technical field of knitting industry slide cam selector detection, specifically a kind of slide cam selector based on stroboscopic principle
Detecting system and method.
Background technology
Circular knitting machine is a kind of weft-knitting machinery, is one of main mechanical of knitting industry, with yield height, technique stream
The features such as journey is short, adaptability to raw materials is wide, mainly for the production of the clothes such as T-shirt, underwear, wool and industry cloth.In recent years, state
Inside and outside production firm is all making great efforts the new machine of exploitation according to the demand of client, and in innovative design, material is selected, processing technology,
Manufacture assembling, all many-sides such as automatically controls and is all improved, and this makes the manufacturing of circular knitting machine have development faster, goes out
Showed with high machine number, fine needle away from, many ways, it is multi-functional the features such as double-faced jacquard circular knitting machine, in rib collar braiding, single two-sided carry
The braiding such as flower, embossing can functionally complete the work of straight-bar machines, but operating efficiency upper several times higher than straight-bar machines.
Slide cam selector is the crucial executing agency of circular knitting machine work, and its service behaviour and frequency etc. will all directly affect the standard of jacquard weave
True property and reliability, so as to directly affect the performance of whole machine.The non-normal working of slide cam selector can make fabric occur flower pattern entanglement and
Deformation, or even it is also possible to cause the malfunction of mechanism to cause mechanical failure.
The detection of slide cam selector performance is always a difficult problem in the field.Conventional detecting system is cumbersome, detection effect
Rate is not high, performance is not good, with high costs, affects the performance of enterprises.Conventional manual detection means not only inefficiency, and it is reliable
Property is overly dependent upon individual experience.
Therefore, digitalized needle selecting machine detecting system of the research and development towards high-grade knitted circular knitting machine, it is ensured that slide cam selector can be reliable
Really work, the stability of the runnability to ensureing existing high-grade knitted machinery, improve production efficiency lifts China's knitted dress standby
Technical merit, while realize the renovation and utilization of second-hand machine, the utilization rate of resource is improved, with very important realistic meaning.
The content of the invention
It is an object of the invention to be directed to the deficiencies in the prior art, there is provided a kind of slide cam selector based on stroboscopic principle is detected
System.
Slide cam selector detecting system of the present invention based on stroboscopic principle includes STM32 control units, CPLD control units, LED
Drive circuit, slide cam selector drive circuit；Described STM32 control units include STM32 embedded microprocessors, key-press input electricity
Road, adjustable potentiometer input circuit, display module；Button inputting circuits are connected with the I/O port of STM32 embedded microprocessors；
The output pin that adjusts of adjustable potentiometer connects with the ADC interface of STM32 embedded microprocessors in adjustable potentiometer input circuit
Connect；Display module includes LCD display and LCD display driver circuits, the input that LCD display passes through LCD display driver circuits
Output interface is connected to the I/O port of STM32 embedded microprocessors；The control program of slide cam selector detecting system is by programming
Mode is stored in the internal processes data storage of STM32 embedded microprocessors；CPLD control units by LPT with
STM32 embedded microprocessors are connected, and the pulse generation program of slide cam selector detecting system is stored in CPLD by way of programming
In control unit；LED drive circuit and slide cam selector drive circuit are connected with the I/O port of CPLD control units.
Described STM32 embedded microprocessor models STM32F103C8, programmable logic device in CPLD control units
Part model EPM240T100C5.
It is a further object to provide being based on the detection method of said system：
Based on stroboscopic principle, from high brightness spotlight LED lamp as light source, LED is controlled by STM32 control units
Flicker frequency and drive needle selector tool bit hunting frequency so that LED flicker frequency and cutter head hunting frequency are consistent
And it is synchronous；On the basis of synchronizing signal, LED is lighted again after time delay Δ t in a flicker cycle, and the pendulum of needle selector tool bit
Dynamic frequency is constant with amplitude, now because LED scintillation time is different, is occurred in not to needle selector tool bit is static by eye-observation
Same position, if needle selector tool bit shake occurs, swings the phenomenon such as not in place and can be very easy to be identified, so as to reach detection
Purpose.
The lamp bright time is as far as possible short in the flicker cycle of described LED.
The button inputting circuits that the flicker frequency of LED and hunting frequency f of needle selector tool bit pass through STM32 control units
Input, and it is supplied to STM32 embedded microprocessors；Electricity on the adjustable potentiometer of STM32 embedded microprocessors collection simultaneously
Pressure value Vin, according toIt is calculated time delay Δ t values；STM32 embedded microprocessors are shown by LPT and LCD and are driven
Dynamic circuit shows the frequency of input on LCD display（What frequency herein was referred to is the flicker frequency of LED and slide cam selector knife
The hunting frequency of head）With time delay Δ t values；Simultaneously frequency values and time delay Δ t values are sent into CPLD controls by STM32 embedded microprocessors
Unit processed, by CPLD two-way frequency identical pulse signal is produced, and all the way signal gives LED drive circuit and drives LED flicker,
All the way pulse signal gives slide cam selector drive module and drives needle selector tool bit；Finally by adjustable potentiometer is adjusted, visually with regard to energy
It was observed that needle selector tool bit is static to occur in diverse location, may determine that needle selector tool bit shake, swing not in place etc. with this
Phenomenon.
The invention has the beneficial effects as follows：
1）The present invention utilizes stroboscopic principle, the method for irradiating needle selector tool bit using glittering LED lamp, to visually observe needle selection
The moving situation of device cutter head conveniently differentiating slide cam selector service behaviour, so as to overcome conventional detection means and inspection method effect
Rate is low, poor reliability, lack versatility the shortcomings of, this is the innovation of the slide cam selector detecting system in detection means and method.
2）Using STM32 embedded microprocessor control systems, system function module is melted to be sent out, and system architecture is clear, work(
Energy module flexible configuration, improves the reliability and extensibility of system, and with friendly human-computer interaction interface.
3）Using CPLD CPLD technologies, using the quick output pulse frequency letter of parallel processing capability
Number, LED and slide cam selector are driven, advantages of the CPLD in terms of parallel control and communication is played, simplify circuit design, improve system
Stability, reliability and parallel control ability.
Description of the drawings
Fig. 1 is the system construction drawing of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.
As shown in figure 1, slide cam selector detecting system of the present invention based on stroboscopic principle includes that STM32 control units, CPLD are controlled
Unit processed, LED drive circuit, slide cam selector drive circuit；Described STM32 control units include STM32 embedded microprocessors,
Button inputting circuits, adjustable potentiometer input circuit, display module, button inputting circuits and STM32 embedded microprocessors
I/O port connects, and display module includes LCD display and LCD display driver circuits, and LCD display is shown by LCD and drives electricity
The input/output interface on road is connected to the I/O port of STM32 embedded microprocessors；The control program of slide cam selector detecting system is led to
The mode for crossing programming is stored in the internal processes data storage of STM32 embedded microprocessors；CPLD control units pass through
LPT is connected with STM32 embedded microprocessors, and the pulse generation program of slide cam selector detecting system is deposited by way of programming
Storage is in CPLD control units；LED drive circuit and slide cam selector drive circuit are connected with the I/O port of CPLD control units.
Adjustable potentiometer has 1,2,3 three pins in adjustable potentiometer input circuit, the 1st, 3 pins be that fixed resistance value is drawn
Pin, the 2nd pin is to adjust output pin, by the 1st pin welding system power supply 3.3V of potentiometer, the 3rd pin welding system in system
Power supply ground, the 2nd pin connects the ADC interface of STM32 embedded microprocessors, therefore the voltage Vin excursions of the 2nd pin are 0
～3.3V.
Programmable logic device in described STM32 embedded microprocessor model STM32F103C8, CPLD control units
Part model EPM240T100C5.
Based on stroboscopic principle, from high brightness spotlight LED lamp as light source, LED is controlled by STM32 control units
Flicker frequency and drive needle selector tool bit hunting frequency so that LED flicker frequency and cutter head hunting frequency are consistent
And it is synchronous；On the basis of synchronizing signal, LED is lighted again after time delay Δ t in a flicker cycle, and the pendulum of needle selector tool bit
Dynamic frequency is constant with amplitude, now because LED scintillation time is different, is occurred in not to needle selector tool bit is static by eye-observation
Same position, if needle selector tool bit shake occurs, swings the phenomenon such as not in place and can be very easy to be identified, so as to reach detection
Purpose.
The lamp bright time is as far as possible short in the flicker cycle of described LED.
It is based on the detection method of said system：
The button inputting circuits that the flicker frequency of LED and hunting frequency f of needle selector tool bit pass through STM32 control units
Input, and it is supplied to STM32 embedded microprocessors；Electricity on the adjustable potentiometer of STM32 embedded microprocessors collection simultaneously
Pressure value Vin, according toIt is calculated time delay Δ t values；STM32 embedded microprocessors are shown by LPT and LCD and are driven
Dynamic circuit shows the frequency of input on LCD display（What frequency herein was referred to is the flicker frequency of LED and slide cam selector knife
The hunting frequency of head）With time delay Δ t values；Simultaneously frequency values and time delay Δ t values are sent into CPLD controls by STM32 embedded microprocessors
Unit processed, by CPLD two-way frequency identical pulse signal is produced, and all the way signal gives LED drive circuit and drives LED flicker,
All the way pulse signal gives slide cam selector drive module and drives needle selector tool bit；Finally by adjustable potentiometer is adjusted, visually with regard to energy
It was observed that needle selector tool bit is static to occur in diverse location, may determine that needle selector tool bit shake, swing not in place etc. with this
Phenomenon.
Above-described embodiment is not that the present invention is not limited only to above-described embodiment, as long as meeting for the restriction of the present invention
Application claims, belong to protection scope of the present invention.
Claims (1)
1. a kind of control method of the slide cam selector detecting system based on stroboscopic principle, the method is based on following slide cam selector detection system
System, the system includes STM32 control units, CPLD control units, LED drive circuit, slide cam selector drive circuit；Described
STM32 control units include STM32 embedded microprocessors, button inputting circuits, adjustable potentiometer input circuit, display mould
Block, button inputting circuits are connected with the I/O port of STM32 embedded microprocessors, adjustable potential in adjustable potentiometer input circuit
The output pin that adjusts of device is connected with the ADC interface of STM32 embedded microprocessors, and display module includes LCD display and LCD
Display driver circuit, LCD display is connected to the embedded places that decline of STM32 by the input/output interface of LCD display driver circuits
The I/O port of reason device, the control program of slide cam selector detecting system is stored in STM32 embedded microprocessors by way of programming
Internal processes data storage in；CPLD control units are connected by LPT with STM32 embedded microprocessors, slide cam selector
The pulse generation program of detecting system is stored in CPLD control units by way of programming；LED drive circuit and slide cam selector
Drive circuit is connected with the I/O port of CPLD control units；It is characterized in that：
Based on stroboscopic principle, from high brightness spotlight LED lamp as light source, the sudden strain of a muscle of LED is controlled by STM32 control units
The hunting frequency of bright frequency and driving needle selector tool bit so that LED flicker frequency and cutter head hunting frequency are consistent and same
Step；
The flicker frequency of LED and hunting frequency f of needle selector tool bit are defeated by the button inputting circuits of STM32 control units
Enter, and be supplied to STM32 embedded microprocessors；Voltage on the adjustable potentiometer of STM32 embedded microprocessors collection simultaneously
Value Vin, according to formulaIt is calculated time delay Δ t values；STM32 embedded microprocessors are aobvious by LPT and LCD
Show that drive circuit shows frequency f of input and time delay Δ t values on LCD display；Simultaneously STM32 embedded microprocessors will frequency
Rate value f and time delay Δ t values send into CPLD control units, and by CPLD control units two-way frequency identical pulse signal is produced, and one
Road signal gives LED drive circuit and drives LED flicker, and all the way pulse signal gives slide cam selector drive module and drives slide cam selector knife
Head；Finally by adjustable potentiometer is adjusted, diverse location is occurred according to needle selector tool bit is static, so as to judge needle selector tool bit
Shake, swing incomplete phenomena.
Priority Applications (1)
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| CN201410845228.0A CN104536438B (en) | 2014-12-31 | 2014-12-31 | Stroboscopic theory based needle selector detecting system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410845228.0A CN104536438B (en) | 2014-12-31 | 2014-12-31 | Stroboscopic theory based needle selector detecting system and method |
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| Publication Number | Publication Date |
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| CN104536438A CN104536438A (en) | 2015-04-22 |
| CN104536438B true CN104536438B (en) | 2017-05-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108642699B (en) * | 2018-07-18 | 2023-11-24 | 广东创达自动化装备有限公司 | Fault maintenance system and method for electromagnetic needle selector of circular knitting machine |
| CN109933044B (en) * | 2019-01-07 | 2020-12-15 | 浙江恒强科技股份有限公司 | Flat knitting machine needle selector detection system |
| CN112725989A (en) * | 2020-12-29 | 2021-04-30 | 宁波宏大纺织仪器有限公司 | Wireless synchronous stroboscope device |
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