CN101429698B - Weft feeler used on jet loom - Google Patents
Weft feeler used on jet loom Download PDFInfo
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- CN101429698B CN101429698B CN2008101365587A CN200810136558A CN101429698B CN 101429698 B CN101429698 B CN 101429698B CN 2008101365587 A CN2008101365587 A CN 2008101365587A CN 200810136558 A CN200810136558 A CN 200810136558A CN 101429698 B CN101429698 B CN 101429698B
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Abstract
The invention relates to a weft-detecting device used on a jet loom, which comprises a weft-detecting sensor and a preposed amplifier. The device also comprises a polarity normalization unit and an authentication unit, wherein the polarity normalization unit normalizes electric signals representing white yarns or black yarns outputted through the preposed amplifier into signals with the same polarity; the authentication unit is connected with the output end of the polarity normalization unit, and comprises a plurality of authentication channels with different authentication parameters and a channel distributor; the number of the authentication channels is at least equal to the kind number of weft yarns used for weaving; and the channel distributor is triggered by a weft yarn selecting signal provided by the outside so as to ensure that electric signals corresponding to different weft yarns enter corresponding authentication channels to realize weft detection. As the weft-detecting device is simultaneously provided with the polarity normalization unit and the multiple channel authentication units, so that each weft yarn corresponds to one authentication channel in weaving, the best authentication effect, namely the weft-detection effect, can be acquired; meanwhile, low cost is also realized.
Description
Technical field
The present invention relates to a kind of air-jet loom, relate in particular to the Weft feeler on the air-jet loom.
Background technology
Air-jet loom relies on air-jet weft insertion, weft yarn free flight under the guiding of air-flow.Weft yarn has and blows not to the end or blow disconnected situation and take place, and the situation that also has long latitude, short latitude in addition takes place, and these all are " float ".Float causes defective cloth, is unallowed, so need to detect and send stop sign by " spy latitude " device.We can say that " spy latitude " is the indispensable part of air-jet loom.The basic functional principle of " spy latitude " at present, may be summarized to be following process: sensor weft yarn signal also is converted to electric signal, after amplifying through amplifier electric signal is sent into discriminating unit, and discriminating unit is sent identification result into logical block.Present " spy latitude " the spy latitude schemes that adopt two sensors, as shown in Figure 7, two road signals are together sent identification result into logical block after through discriminating unit separately more.Logical block is made normal or unusual judgement in conjunction with other time sequence information of loom, and exports corresponding signal.
The kind of weft yarn is a lot, and different weft yarns can show different electric signal through behind the sensor, and it is strong and weak different to be not only signal, and signal aspect is also different, and this just makes the design of discriminating unit difficult.The feeler plate of relatively more typical external certain air-jet loom adopts two electro-optical pickoffs, and the electric signal of each sensor output is input to discriminating unit after amplifying through amplifier.Each discriminating unit has designed two simultaneously and has differentiated passage: white yarn channel and crape passage.So-called " white yarn " is meant the reed background of comparing, its yarn signal strengthens, and light is had higher reflectivity, and certainly not necessarily " in vain ", the yarn that the yarn signal of other color needs only than the background signal enhancing all can be classified as this class.And " crape " just is meant and shows as the class yarn that yarn signal is more weak than background signal to reflection of light.For the yarn of two kinds of clearly demarcated colors of " deceiving ", " in vain ", this design expression is two different passages, but for belonging to " in vain " together or belonging to the different yarn of " deceiving " together, this design is actual to be a passage.Whole design has a plurality of potentiometers, can regulate according to different situations, different yarns.But this single pass adjusting can only be to take into account, and can not reach each yarn all at the parameter state of the best, just makes that also the effect of " discriminating " is not best.
For different types of white yarn and different types of crape, it is corresponding with it that discriminating unit can only be regulated a channel gain, therefore attends to one thing and lose sight of another unavoidably, can not reach and every kind of optimum condition that yarn is corresponding, the existing shortcoming of visiting the latitude technology that Here it is.
In reality was weaved, the only coloured lower yarn of reflectivity that can use crape and have " crape " characteristic of knitting was being weaved in the activity in a large number, do not use " crape ", " crape passage " in the Weft feeler is actual on the shelf at this moment, and this is a kind of waste, also is the defective of prior art.
Summary of the invention
The object of the invention just provides the Weft feeler of the higher air-jet loom of a kind of accuracy of detection.
In order to reach the foregoing invention purpose, technical scheme of the present invention is: a kind of Weft feeler that is applied on the air-jet loom, it comprises the prime amplifier that is electrically connected the spy latitude sensor, input end and the described spy latitude sensor that are used to detect the weft yarn signal electric signal that is used for visiting the latitude sensor amplifies, and it also comprises
Polarity normalizing unit, the output terminal of described polarity normalizing unit and prime amplifier is electrically connected, this polarity normalizing unit will through the electric signal of the white yarn of representative of prime amplifier output or crape all normalizing become the identical signal of polarity;
The hyperchannel discriminating unit, it is connected with polarity normalizing unit output terminal, described discriminating unit comprises the different discriminating passage of a plurality of discrimination parameters, be used for the channel distributor that the discriminating passage with weft yarn signal behind the normalizing of polarity normalizing unit output and corresponding discrimination parameter is complementary, the number of described discriminating passage at least with the kind quasi-equal of weaving used weft yarn, thereby the weft yarn that described channel distributor is provided by the outside is selected signal to trigger the electric signal that makes different weft yarn correspondences to enter corresponding discriminating passage to realize visiting latitude.
Further, described polarity normalizing unit is the mimic channel of being made up of operational amplifier and peripheral component thereof, the digital circuit that described a plurality of discriminating passage is made of field programmable gate function and the analog to digital converter that is connected with the input end of field programmable gate function, the digital Discr. of described field programmable gate function internal configurations different parameters, the weft yarn that described field programmable gate function reads the outside to be provided is selected signal, and the digital Discr. of configuration different parameters is corresponding with different discriminating passages with the electric signal of realizing different weft yarn correspondences.
Described digital Discr. comprises the digital filter of variable element, the discrimination parameter that different digital filter parameters is corresponding different.
Described field programmable gate function is one of CPU, MPU, DSP, FPGA, CPLD or combination.
Described analog to digital conversion circuit is integrated in the described field programmable gate function.
Described polarity normalizing unit and the electricity isolation mutually of described hyperchannel discriminating unit.
Described Weft feeler is provided with serial communication interface, and this serial communication interface is connected with the serial communication net of the control system inside of air-jet loom and carries out information interaction with the main frame with the inner serial communication net of control system.
The inner serial communication net of the control system of described air-jet loom is a RS485 master-slave communication net.
Because the utilization of technique scheme, the present invention has following advantage: because this Weft feeler is provided with polarity normalizing unit and hyperchannel discriminating unit simultaneously, thereby make that each weft yarn can differentiate that passage is corresponding with one in weaving, thereby obtain best identification result, also promptly visit the latitude effect, realize that simultaneously cost is lower.
Description of drawings
Accompanying drawing 1 is the electric theory diagram of Weft feeler of the present invention;
The electric theory diagram that accompanying drawing 2 is realized by mimic channel and digital circuit for Weft feeler of the present invention;
Accompanying drawing 3 is used to realize the circuit diagram of polarity normalizing unit for the present invention;
Another electric theory diagram that accompanying drawing 4 is realized by mimic channel and digital circuit for the invention Weft feeler;
Accompanying drawing 5 is a prior art electricity theory diagram.
Wherein: 1, visit the latitude sensor; 2, prime amplifier; 3, polarity normalizing unit; 4, hyperchannel discriminating unit; 41, differentiate passage; 42, channel distributor; 5, logical block.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiment of the invention is elaborated:
Accompanying drawing 2 is realized theory diagram for Weft feeler circuit of the present invention.Described spy latitude sensor 1, prime amplifier 2 and polarity normalizing unit 3 are all realized by mimic channel, hyperchannel discriminating unit 4 and follow-up logical block thereof realize by digital circuit, like this, between polarity normalizing unit 3 and hyperchannel discriminating unit 4, be connected an analog to digital converter, pass through A/D converter, simulating signal is become digital signal, so hyperchannel discriminating unit thereafter, differentiate that thresholding, logical block all adopt digital circuit to handle.This digital circuit can adopt field programmable gate function to realize, for example CPU, MPU, DSP, CPLD, FPGA etc.In order to obtain to do preferably jamming performance, mimic channel and digital circuit electricity are isolated, shown in A among the figure.In this embodiment, therefore isolating points needed to realize the signal transmission with linear isolating device/circuit before A/D.
Circuit formation to polarity normalizing unit 3 and hyperchannel discriminating unit makes a presentation below:
Polarity normalizing unit among the present invention is realized by mimic channel.Polarity normalizing element circuit figure as shown in Figure 3, this circuit mainly is made of elements such as operational amplifier and resistance, diodes, resistance R 1=R2=R3=R5=2R4 among the figure is satisfying under the situation of this condition, the conversion of signals of negative polarity can be become the signal of positive polarity.Capacitance C in the circuit is necessary simultaneously.This circuit is the precise full-wave detection circuit of using always, also claims absolute value circuit, and its principle of work repeats no more.Because the existence of diode can be finished the polarity normalizing automatically.
Another electric theory diagram that accompanying drawing 4 is realized by mimic channel and digital circuit for Weft feeler of the present invention.Present embodiment has adopted CPU to do digital signal processing.Method with digital signal processing replaces mimic channel, can extract the transport function of mimic channel earlier, according to the corresponding digital filter of transport function design of this circuit.The parameter that changes digital filter can obtain different discrimination parameters, by selecting the related of signal, can realize the function of channel distributor, thereby make every kind of weft yarn that the reasonable parameter coupling can both be arranged with weft yarn, the weft yarn identification result of obtaining, promptly good spy latitude effect.This digital circuit part also is that electricity is isolated with artificial circuit part, and shown in A among the figure, isolating points is after A/D.CPU also has serial communication interface, can be connected with the serial communication net in the air-jet loom electric control system, thereby realizes information interaction, and this moment, Weft feeler became a slave of serial communication net in the air-jet loom control system.Certainly,, other control function can also be realized, this Weft feeler and other functional unit design, a shared CPU can be merged if CPU has rich ability.Equally, if necessary, also can connect the sensor more than two.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (8)
1. Weft feeler that is applied on the air-jet loom, it comprises the prime amplifier (2) that is electrically connected the spy latitude sensor (1), input end and the described spy latitude sensor (1) that are used to detect the weft yarn signal electric signal that is used for visiting latitude sensor (1) amplifies, and it is characterized in that: it also comprises
Polarity normalizing unit (3), the output terminal of described polarity normalizing unit (3) and prime amplifier (2) is electrically connected, and the white yarn of representative that this polarity normalizing unit (3) will be exported through prime amplifier (2) or the electric signal of crape all normalizing become the identical signal of polarity;
Hyperchannel discriminating unit (4), it is connected with polarity normalizing unit (3) output terminal, described hyperchannel discriminating unit (4) comprises the discriminating passage (41) that a plurality of discrimination parameters are different, the channel distributor (42) that the weft yarn signal behind the normalizing that is used for polarity normalizing unit (3) is exported and the discriminating passage (41) of corresponding discrimination parameter are complementary, the number of described discriminating passage (41) at least with the kind quasi-equal of weaving used weft yarn, described channel distributor (42) thus the weft yarn that provides by the outside select signal to trigger the electric signal that makes different weft yarn correspondences to enter corresponding discriminating passage (41) to realize visiting latitude.
2. the Weft feeler that is applied on the air-jet loom according to claim 1, it is characterized in that: the mimic channel of described polarity normalizing unit (3) for forming by operational amplifier and peripheral component thereof, the digital circuit of described a plurality of discriminating passages (41) for constituting by field programmable gate function and the analog to digital converter that is connected with the input end of field programmable gate function, the digital Discr. of described field programmable gate function internal configurations different parameters, the weft yarn that described field programmable gate function reads the outside to be provided is selected signal, and the digital Discr. of configuration different parameters is corresponding with different discriminating passages (41) with the electric signal of realizing different weft yarn correspondences.
3. the Weft feeler that is applied on the air-jet loom according to claim 2 is characterized in that: described digital Discr. comprises the digital filter of variable element, the discrimination parameter that different digital filter parameters is corresponding different.
4. the Weft feeler that is applied on the air-jet loom according to claim 2 is characterized in that: described field programmable gate function is one of CPU, MPU, DSP, FPGA, CPLD or combination.
5. the Weft feeler that is applied on the air-jet loom according to claim 2 is characterized in that: described analog to digital conversion circuit is integrated in the described field programmable gate function.
6. the Weft feeler that is applied on the air-jet loom according to claim 2 is characterized in that: described polarity normalizing unit (3) and described hyperchannel discriminating unit (4) electricity isolation mutually.
7. the Weft feeler that is applied on the air-jet loom according to claim 1, it is characterized in that: described Weft feeler is provided with serial communication interface, and this serial communication interface is connected with the serial communication net of the control system inside of air-jet loom and carries out information interaction with the main frame with the inner serial communication net of control system.
8. the Weft feeler that is applied on the air-jet loom according to claim 7 is characterized in that: the inner serial communication net of the control system of described air-jet loom is a RS485 master-slave communication net.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101365587A CN101429698B (en) | 2008-12-12 | 2008-12-12 | Weft feeler used on jet loom |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101365587A CN101429698B (en) | 2008-12-12 | 2008-12-12 | Weft feeler used on jet loom |
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| CN101429698A CN101429698A (en) | 2009-05-13 |
| CN101429698B true CN101429698B (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101365587A Active CN101429698B (en) | 2008-12-12 | 2008-12-12 | Weft feeler used on jet loom |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113403731A (en) * | 2021-06-29 | 2021-09-17 | 山东日发纺织机械有限公司 | Weft detection device and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034974U (en) * | 1988-03-15 | 1989-03-29 | 任长安 | Integrated-circuit photoelectric weft detecting controller |
| CN2063950U (en) * | 1989-03-25 | 1990-10-17 | 上海申泰科技发展建设公司 | Broken weft controller by means of photoelectric automatic monitoring |
| CN201035394Y (en) * | 2006-10-17 | 2008-03-12 | 经纬纺织机械股份有限公司 | Digital weft-detecting controller |
-
2008
- 2008-12-12 CN CN2008101365587A patent/CN101429698B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034974U (en) * | 1988-03-15 | 1989-03-29 | 任长安 | Integrated-circuit photoelectric weft detecting controller |
| CN2063950U (en) * | 1989-03-25 | 1990-10-17 | 上海申泰科技发展建设公司 | Broken weft controller by means of photoelectric automatic monitoring |
| CN201035394Y (en) * | 2006-10-17 | 2008-03-12 | 经纬纺织机械股份有限公司 | Digital weft-detecting controller |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平6-280134A 1994.10.04 |
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| CN101429698A (en) | 2009-05-13 |
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Effective date of registration: 20160713 Address after: 215223 Jiangsu Province, Wujiang District of Suzhou City Heng Shan Zhen Wan Ping Road Development Patentee after: Wujiang Wan Gong mechanical & electronic equipment corporation, Ltd Address before: 215223 Wujiang City, Jiangsu province wanpin town Patentee before: Jiangsu Wangong Science and Technology Group Co., Ltd. |