CN104131411B - Circular knitting knitting machine needle screening device and knitting needle discriminating method - Google Patents
Circular knitting knitting machine needle screening device and knitting needle discriminating method Download PDFInfo
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Abstract
A kind of circular knitting knitting machine needle screening device and knitting needle discriminating method, device includes controlling processing unit, period ratio computing unit, dutycycle computing unit, threshold process unit and abnormal pin discriminator unit.The present invention, by extracting the signal characteristic of every knitting needle, calculates every broken needle threshold value corresponding to knitting needle and askew pin threshold value, and whether threshold value fracture or perverted abnormal knitting needle, the numbering of output abnormality knitting needle occurs for screening in circular knitting machine circular flow.The present invention can be that circular knitting machine determines the abnormal pin such as broken needle, askew pin, has real-time performance good, without the feature of rate of false alarm.
Description
Technical field
The present invention relates to knitting machine technical field, particularly relate to one be applied to circular knitting knitting machine needle detection during
Circular knitting knitting machine needle screening device and knitting needle discriminating method.
Background technology
Circular knitting machine is during working long hours, and the syringe needle of knitting needle easily fractures and splits or lateral thrust, thus
Broken needle or askew pin occur, this all can cause continuous print fault occur on fabric, cause the generation of fabric waste product.Therefore,
If abnormal pin (including broken needle and askew pin) can be detected in time, it is possible to effectively avoid such loss.
In prior art, what needle break of knitting frame detection technique practicality was higher is optical intensity modulation type Fibre Optical Sensor
Device detection technique, light source is radiated on tested knitting needle, and the light that tested knitting needle reflects turns through photoelectric switching circuit
Change the signal of telecommunication into, after signal conditioning circuit, realize broken pin test.During knitting machine fast turn-around, every knitting needle
Syringe needle reflectance is different, and syringe needle reflection end face there is also fine distinction, which results in every telecommunications corresponding to knitting needle
Number waveform there is larger difference.When detecting broken needle, askew pin, all knitting needles use identical threshold value to judge,
Easily cause wrong report, reduce production efficiency.
Therefore, it is badly in need of the knitting needle screening device that a kind of real-time performance is good, rate of false alarm is low.
Summary of the invention
Technical problem solved by the invention is to propose a kind of circular knitting knitting machine needle screening device and knitting needle examination side
Method, knitting needle signal is screened by these apparatus and method, can determine the abnormal pin such as broken needle, askew pin, have reality
Shi Xingneng is good, without the feature of rate of false alarm.
Before describing the technical solution of the present invention, for ease of description of the invention and understanding, the present invention is related to
And precondition make description below:
1., for the cloth of random sample formula, on circular knitting machine dials, the sum of knitting needle is fixing.
2. when light source is radiated on knitting needle, the light being reflected back is the signal of telecommunication through opto-electronic conversion, and the signal of telecommunication is adjusted through signal
Reason circuit output low level, exports high level when light source is not radiated on knitting needle.Therefore, a knitting needle is through one
Secondary light source, a corresponding rectangular pulse signal, this pulse signal is the input signal of the present invention.As in figure 2 it is shown,
The pulse signal that the knitting needle of 21 indications is corresponding is 22, the pulse period is Tn.Owing to every knitting needle head reflectance is different,
Syringe needle reflection end face there is also fine distinction, when circular knitting machine rotates, and the pulse of signal conditioning circuit output
Signal pulsewidth is incomplete same.
The present invention is achieved by the following technical solutions:
A kind of circular knitting knitting machine needle screening device, its feature is that this device includes controlling processing unit, period ratio
Computing unit, dutycycle computing unit, threshold process unit and abnormal pin discriminator unit, described control processes single
Unit, period ratio computing unit and the input that input is device of dutycycle computing unit, receive input signal,
The described outfan controlling processing unit respectively with the 2nd input, the dutycycle of described period ratio computing unit
2nd input of the 2nd input of computing unit, the 2nd input of threshold process unit and abnormal pin discriminator unit
End is connected, and the outfan of described period ratio computing unit is connected with the 1st input of described threshold process unit,
The outfan of described dutycycle computing unit is connected with the 3rd input of described threshold process unit, described
The outfan of threshold process unit is connected with the 1st input of described abnormal pin discriminator unit, described dutycycle
2nd outfan of computing unit is connected with the 3rd input of described abnormal pin discriminator unit, described abnormal pin
The outfan of discriminator unit is the outfan of device, the examination information of output knitting needle.
2, the circular knitting knitting machine needle screening device described in claim 1 is utilized to carry out the discriminating method of abnormal knitting needle,
Its feature is that the method comprises the steps:
A. feature extraction phases.The feature extraction rank that first lap is knitting needle all to large circle machine of circular knitting machine turnover
Section.
1. N is the knitting needle sum of large circle machine；
2. described control processing unit receives input signal, and this input signal is the rectangle arteries and veins corresponding with tested knitting needle
Punching, when described control processing unit detects the trailing edge saltus step of n-th knitting needle signal, produces an enable
Signal, to described dutycycle computing unit, period ratio computing unit, threshold process unit output enable signal and
Knitting needle numbering n；
3., when receiving the enable signal of described control processing unit, described dutycycle computing unit receives described
Input signal, receives knitting needle numbering n, measures the high level time t of pulse corresponding for knitting needle nnAnd cycle Tn, should
Dutycycle D of pulsenForIt is stored in the DR [n] of array DR；
Described period ratio computing unit receives knitting needle numbering n, measures the cycle T of pulse corresponding for knitting needle nn, meter
Calculate the period ratio P of described input signalnForWherein Tn-1The week of the input signal corresponding to previous knitting needle
Phase, as n-1=0, make Tn-1=Tn, it is stored in the PR [n] of array PR；
4. <, prepare to receive the input signal of next root knitting needle, return step 2. during N as n；As n=N, described
Threshold process unit receive described control processing unit knitting needle numbering, the period ratio computing unit described in reading
Array PR, array DR of described dutycycle computing unit, according to formulaCalculate every to knit
The broken needle threshold value of pin, is stored in array BT；According to formulaCalculate every knitting needle
Lateral after askew threshold value, be stored in array BCT；According to formulaCalculate every knitting needle
Lateral before askew threshold value, be stored in array FCT；After having calculated, enter detection-phase；
B. detection-phase:
5. described control processing unit receives input signal, and this input signal is the rectangle arteries and veins corresponding with tested knitting needle
Punching, when described control processing unit detects the trailing edge saltus step of n-th knitting needle signal, produces an enable
Signal, enables signal and knitting needle numbering n to described dutycycle computing unit and abnormal pin discriminator unit output；
6., when receiving the enable signal of described control processing unit, described dutycycle computing unit receives described
Input signal, receives knitting needle numbering n, measures the high level time t of described input signalnAnd cycle Tn, this pulse
Dutycycle beThis dutyfactor value is exported to described abnormal pin discriminator unit；
7., when receiving the enable signal of described control processing unit, described abnormal pin discriminator unit receives knitting needle
Numbering n, the dutyfactor value of the dutycycle computing unit output described in receptionCarry from described threshold process unit
Take broken needle threshold value BT [n] of knitting needle n, lateral front askew threshold value FCT [n], lateral rear askew threshold value BCT [n], work as knitting needle
The dutyfactor value of nTime, it determines a rear knitting needle of knitting needle n is broken needle, when the dutyfactor value of knitting needle nOrA rear knitting needle of differentiation knitting needle n is askew pin；If rear the one of knitting needle n
When root knitting needle is screened as abnormal pin, perform step 8., otherwise, prepare to receive the input signal of next root knitting needle, return
Step is 5.；
Numbering n+1 of 8. described abnormal pin discriminator unit output abnormality knitting needle, as n=N, output abnormality knitting needle
Numbered 1.
The technique effect of the present invention is as follows:
Compared with prior art, the circular knitting knitting machine needle screening device of present invention offer and knitting needle discriminating method are logical
Crossing the signal characteristic extracting every knitting needle, calculate every broken needle threshold value corresponding to knitting needle and askew pin threshold value, threshold value is used
Whether occurring fracture or perverted abnormal knitting needle in circular knitting machine circular flow in screening, output abnormality is knitted
The numbering of pin.These apparatus and method can eliminate because different, the reflection end face difference of reflectance etc. of light is caused by knitting needle
Wrong report, real-time performance is good, can be suitably used for the circular knitting machine examination to knitting needle.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the knitting needle screening device of the specific embodiment of the invention；
Input signal sequence schematic diagram when Fig. 2 is the normal knitting needle of the specific embodiment of the invention；
Input signal sequence schematic diagram when Fig. 3 is the existence exception pin of the specific embodiment of the invention.
Detailed description of the invention
The circular knitting knitting machine needle screening device proposed the present invention below in conjunction with the drawings and specific embodiments is made further
Describe in detail.It should be noted that, accompanying drawing all uses the form simplified very much, is only used for conveniently, assists lucidly
The purpose of the bright embodiment of the present invention.
The present invention provides a kind of circular knitting knitting machine needle screening device and knitting needle discriminating method, and these apparatus and method are applied
During circular knitting knitting machine needle detects, knitting needle signal is screened, it determines go out the abnormal pin such as broken needle, askew pin,
There is real-time performance good, without the feature of rate of false alarm.
Refer to Fig. 1, the circular knitting knitting machine needle screening device that the present invention provides includes controlling processing unit 13, week
Phase is than computing unit 12, dutycycle computing unit 14, threshold process unit 15 and abnormal pin discriminator unit 16, institute
The input controlling processing unit 13, period ratio computing unit 12 and dutycycle computing unit 14 stated is device
Input, receives input signal 11, the described outfan controlling processing unit 13 respectively with described period ratio
2nd input of computing unit 12, the 2nd input of dutycycle computing unit 14, threshold process unit 15
2nd input is connected with the 2nd input of abnormal pin discriminator unit 16, described period ratio computing unit 12
Outfan is connected with the 1st input of described threshold process unit 15, described dutycycle computing unit 14
Outfan is connected with the 3rd input of described threshold process unit 15, described threshold process unit 15 defeated
Go out end to be connected with the 1st input of described abnormal pin discriminator unit 16, described dutycycle computing unit 14
2nd outfan is connected with the 3rd input of described abnormal pin discriminator unit 16, described abnormal pin discriminator unit
The outfan of 16 is the outfan of device, the examination information of output knitting needle.
Refer to Fig. 2, input signal sequence schematic diagram during normal knitting needle in time scale t.Each normal knitting needle
A corresponding rectangular pulse signal, cycle and the dutycycle of each pulse signal are the most different.Period ratio computing unit 12
Calculating the ratio in the cycle of input signal and the cycle of previously input signal, such as knitting needle 21, numbered n, it is right
Answering input signal is pulse 22, and the pulse period is Tn, the pulse period that previous knitting needle of knitting needle 21 is corresponding is Tn-1,
The ratio in the cycle of knitting needle 21 isIn the PR [n] of storage array PR；Dutycycle computing unit 14 calculates
The dutyfactor value of current input signal, illustrates, the high level time of pulse 22 is t equally with knitting needle 21n, knit
The dutyfactor value of pin 21 isIn the DR [n] of storage array DR.
Refer to Fig. 3, when three knitting needles in reference Fig. 2 become abnormal pin, the input in time scale t
Signal sequence schematic diagram.Abnormal pin 31 is broken needle, and signal pulse 34 is the corresponding input letter of 31 previous pins of broken needle
Number；Abnormal pin 42 is lateral rear askew askew pin, and its corresponding input signal is pulse 35；Abnormal pin 33 be laterally before
Askew askew pin, its corresponding input signal is pulse 36.Compared with the input signal of Fig. 2, when abnormal pin occurs,
The dutycycle of abnormal previous pin of pin can occur large change, thus according to the variation characteristic of dutycycle, can be used for discriminating
Other broken needle, askew pin (askew before askew after lateral, lateral).
Refer to Fig. 1, provide a kind of circular knitting knitting machine needle screening device to carry out the examination of abnormal knitting needle according to the present invention
Method, it is characterised in that the method comprises the steps:
A. feature extraction phases.The feature extraction rank that first lap is knitting needle all to large circle machine of circular knitting machine turnover
Section.
1. N is the knitting needle sum of large circle machine；
2. described control processing unit 13 receives input signal 11, and this input signal 11 is corresponding with tested knitting needle
Rectangular pulse, when described control the trailing edge saltus step that processing unit 13 detects n-th knitting needle signal 11 time,
Produce one and enable signal, to described dutycycle computing unit 14, period ratio computing unit 12, threshold process list
Unit 15 output enables signal and knitting needle numbering n；
3., when receiving the enable signal of described control processing unit 13, described dutycycle computing unit 14 connects
Receive described input signal 11, receive knitting needle numbering n, measure the high level time t of pulse corresponding for knitting needle nnAnd week
Phase Tn, dutycycle D of this pulsenForIt is stored in the DR [n] of array DR；
Described period ratio computing unit 12 receives knitting needle numbering n, measures the cycle T of pulse corresponding for knitting needle nn,
Calculate the period ratio P of described input signalnForWherein Tn-1Input signal corresponding to previous knitting needle
In the cycle, as n-1=0, make Tn-1=Tn, it is stored in the PR [n] of array PR；
4. <, prepare to receive the input signal of next root knitting needle, return step 2. during N as n；As n=N, described
Threshold process unit 15 receive the knitting needle numbering of described control processing unit 13, period ratio described in reading calculates
Array PR of unit 12, array DR of described dutycycle computing unit 14, according to formula
Calculate the broken needle threshold value of every knitting needle, be stored in array BT；According to formulaMeter
Calculate the lateral rear askew threshold value of every knitting needle, be stored in array BCT；According to formulaMeter
Calculate the lateral front askew threshold value of every knitting needle, be stored in array FCT；After having calculated, enter detection-phase；
B. detection-phase:
5. described control processing unit 13 receives input signal 11, and this input signal 11 is corresponding with tested knitting needle
Rectangular pulse, when described control the trailing edge saltus step that processing unit 13 detects n-th knitting needle signal 11 time,
Produce one and enable signal, enable letter to described dutycycle computing unit 14 and abnormal pin discriminator unit 16 output
Number and knitting needle numbering n；
6., when receiving the enable signal of described control processing unit 13, described dutycycle computing unit 14 connects
Receive described input signal 11, receive knitting needle numbering n, measure the high level time t of described input signal 11nAnd the cycle
Tn, the dutycycle of this pulse isThis dutyfactor value is exported to described abnormal pin discriminator unit 16；
7., when receiving the enable signal of described control processing unit 13, described abnormal pin discriminator unit 16 connects
Receive knitting needle numbering n, the dutyfactor value of dutycycle computing unit 14 output described in receptionFrom described threshold process
Unit (15) is middle extracts broken needle threshold value BT [n] of knitting needle n, lateral front askew threshold value FCT [n], lateral rear askew threshold value
BCT [n], when the dutyfactor value of knitting needle nTime, it determines a rear knitting needle of knitting needle n is broken needle, when
The dutyfactor value of knitting needle nOrA rear knitting needle of differentiation knitting needle n is askew pin；
If a rear knitting needle of knitting needle n is screened as abnormal pin, perform step 8., otherwise, prepare to receive next root knitting needle
5. input signal, return step；
Numbering n+1 of 8. described abnormal pin discriminator unit 16 output abnormality knitting needle, as n=N, output abnormality is knitted
Numbered the 1 of pin.
In sum, compared with prior art, the present invention provides circular knitting knitting machine needle screening device and knitting needle are discriminated
Other method, by extracting the signal characteristic of every knitting needle, calculates every broken needle threshold value corresponding to knitting needle and askew pin threshold
Value, whether threshold value there is fracture or perverted abnormal knitting needle for screening in circular knitting machine circular flow,
The numbering of output abnormality knitting needle.These apparatus and method can eliminate because knitting needle is different to the reflectance of light, reflection end face
The wrong report that difference etc. cause, real-time performance is good, can be suitably used for the circular knitting machine examination to knitting needle.
Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to invention
God and scope.So, if these amendments of the present invention and modification belong to the claims in the present invention and equivalent technologies thereof
Within the scope of, then the present invention is also intended to comprise these change and modification.
Claims (2)
1. a circular knitting knitting machine needle screening device, it is characterised in that this device include control processing unit (13),
Period ratio computing unit (12), dutycycle computing unit (14), threshold process unit (15) and abnormal pin are screened
Unit (16), described control processing unit (13), period ratio computing unit (12) and dutycycle computing unit
(14) input is the input of device, receives input signal (11), described control processing unit (13)
Outfan respectively with described the 2nd input of period ratio computing unit (12), dutycycle computing unit (14)
The 2nd input, the 2nd input of threshold process unit (15) and the 2nd of abnormal pin discriminator unit (16) the
Input is connected, the outfan of described period ratio computing unit (12) and described threshold process unit (15)
The 1st input be connected, the 1st outfan of described dutycycle computing unit (14) and described threshold process
3rd input of unit (15) is connected, the outfan of described threshold process unit (15) and described exception
1st input of pin discriminator unit (16) is connected, the 2nd outfan of described dutycycle computing unit (14)
It is connected with the 3rd input of described abnormal pin discriminator unit (16), described abnormal pin discriminator unit (16)
The outfan that outfan is device, output knitting needle examination information.
2. utilize the circular knitting knitting machine needle screening device described in claim 1 to carry out the discriminating method of abnormal knitting needle,
It is characterized in that the method comprises the steps:
A. feature extraction phases, the feature extraction rank that first lap is knitting needle all to large circle machine of circular knitting machine turnover
Section:
1. the knitting needle sum making n=0, N be large circle machine；
2. described control processing unit (13) receives input signal (11), and this input signal (11) is with tested
The rectangular pulse that knitting needle is corresponding, when described control processing unit (13) detects the decline of n-th knitting needle signal
During along saltus step, produce one enable signal, to described dutycycle computing unit (14), period ratio computing unit (12),
Threshold process unit (15) output enables signal and knitting needle numbering n；
3. when receiving the enable signal of described control processing unit (13), described dutycycle computing unit (14)
Receive described input signal (11), receive knitting needle numbering n, measure the high level time t of pulse corresponding for knitting needle nnAnd
Cycle Tn, dutycycle D of the pulse that knitting needle n is correspondingnForIt is stored in the DR [n] of array DR；
Described period ratio computing unit (12) receives knitting needle numbering n, measures the cycle T of pulse corresponding for knitting needle nn,
Calculate the period ratio P of described input signalnForWherein Tn-1Input signal corresponding to previous knitting needle
In the cycle, as n-1=0, make Tn-1=Tn, it is stored in the PR [n] of array PR；
4. <, prepare to receive the input signal of next root knitting needle, return step 2. during N as n；As n=N, described
Threshold process unit (15) receive described control processing unit (13) knitting needle numbering, the cycle described in reading
Ratio array PR of computing unit (12), array DR of described dutycycle computing unit (14), according to formulaCalculate the broken needle threshold value of every knitting needle, be stored in array BT；According to formulaCalculate the lateral rear askew threshold value of every knitting needle, be stored in array BCT；According to public affairs
FormulaCalculate the lateral front askew threshold value of every knitting needle, be stored in array FCT；Calculate
After, enter detection-phase；
B. detection-phase:
5. described control processing unit (13) receives input signal (11), and this input signal (11) is with tested
The rectangular pulse that knitting needle is corresponding, when described control processing unit (13) detects the decline of n-th knitting needle signal
During along saltus step, produce one and enable signal, to described dutycycle computing unit (14) and abnormal pin discriminator unit
(16) output enables signal and knitting needle numbering n；
6. when receiving the enable signal of described control processing unit (13), described dutycycle computing unit (14)
Receive described input signal (11), receive knitting needle numbering n, measure the high level time of described input signal (11)
tnAnd cycle Tn, the dutycycle of this pulse isThis dutycycle is exported to described abnormal pin discriminator unit (16)
Value；
7. when receiving the enable signal of described control processing unit (13), described abnormal pin discriminator unit (16)
Receive knitting needle numbering n, the dutyfactor value that the dutycycle computing unit (14) described in reception exportsFrom described threshold
Value processing unit (15) is extracted knitting needle n broken needle threshold value BT [n], lateral before askew threshold value FCT [n], lateral after
Askew threshold value BCT [n], when the dutyfactor value of knitting needle nTime, it determines a rear knitting needle of knitting needle n is disconnected
Pin, when the dutyfactor value of knitting needle nOrDifferentiate a rear knitting needle of knitting needle n
For askew pin；If a rear knitting needle of knitting needle n is screened as abnormal pin, perform step 8., otherwise, prepare to receive next
5. the input signal of root knitting needle, return step；
Numbering n+1 of 8. described abnormal pin discriminator unit (16) output abnormality knitting needle, as n=N, exports different
Numbered the 1 of Chang Zhizhen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410352587.2A CN104131411B (en) | 2014-07-23 | 2014-07-23 | Circular knitting knitting machine needle screening device and knitting needle discriminating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410352587.2A CN104131411B (en) | 2014-07-23 | 2014-07-23 | Circular knitting knitting machine needle screening device and knitting needle discriminating method |
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| Publication Number | Publication Date |
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| CN104131411A CN104131411A (en) | 2014-11-05 |
| CN104131411B true CN104131411B (en) | 2016-08-24 |
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| CN201410352587.2A Expired - Fee Related CN104131411B (en) | 2014-07-23 | 2014-07-23 | Circular knitting knitting machine needle screening device and knitting needle discriminating method |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2126645A1 (en) * | 1971-05-28 | 1972-11-30 | Fouquet-Werk Frauz & Planck, 7407 Rottenburg | Control device, in particular for thread changing devices and / or selection devices on circular knitting and circular knitting machines |
| FR2298633A2 (en) * | 1975-01-22 | 1976-08-20 | Inst Textile De France | DEVICE D |
| GB2019447B (en) * | 1977-12-06 | 1982-04-15 | Szuminski K M | Knitting needle detection device |
| JPS58127101A (en) * | 1982-01-26 | 1983-07-28 | Paafuekuto:Kk | Proximity detector |
| DE4014661C2 (en) * | 1990-05-08 | 1996-03-28 | Groz & Soehne Theodor | Optical control of knitting needles on knitting machines |
| US6244076B1 (en) * | 1997-05-15 | 2001-06-12 | Nanomotion Ltd. | Optical position monitor for knitting machines |
| CN103789922B (en) * | 2014-02-25 | 2016-05-25 | 杭州嘉拓科技有限公司 | The detection method of crochet hook part, checkout gear and the knitting machine of crochet hook part |
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2014
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