CN106350927A - Weft yarn detection device of weaving machine - Google Patents
Weft yarn detection device of weaving machine Download PDFInfo
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- CN106350927A CN106350927A CN201610545993.XA CN201610545993A CN106350927A CN 106350927 A CN106350927 A CN 106350927A CN 201610545993 A CN201610545993 A CN 201610545993A CN 106350927 A CN106350927 A CN 106350927A
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- weft
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- D03J1/00—Auxiliary apparatus combined with or associated with looms
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H3/00—Inspecting textile materials
- D06H3/08—Inspecting textile materials by photo-electric or television means
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- Chemical & Material Sciences (AREA)
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Abstract
The invention relates to a weft yarn detection device of a weaving machine, which is used to prevent detection delay of weft yarns. During weft insertion of weft yarns of a light absorption system, a light receiving signal (Y2) is output. Because the light receiving signal is used to absorb light by black yarns, a signal level is lower than a light receiving signal (R) of a deformation reed. The light receiving signal is removed by a low frequency removing filtering circuit, and is used to form a high frequency signal (F). In the high frequency signal, an initial light receiving signal (LF) is generated on a negative side. After the high frequency signal is amplified, the high frequency signal is input in a full wave rectification circuit, and a full wave rectification signal (FR) is removed. In the full wave rectification circuit, the negative signal of the high frequency signal, namely the initial light receiving signal, is used as the positive signal, and then is converted into an initial full wave rectification signal (HR). The full wave rectification signal is compared with a threshold (S). the comparator and the full wave rectification signal greater than the threshold are correspondingly used to output weft yarn detection signals, and therefore the initial light receiving signal generated on the negative side is output as the initial weft yarn detection signals without generating delay time.
Description
Technical field
The present invention relates to a kind of in loom to the weft examining device being carried out optical detection by the weft yarn of wefting insertion.
Background technology
Patent document 1 discloses that and examined to by the weft yarn of wefting insertion by optical de-tection means in fluid jet type weaving machine
The weft examining device surveyed.Weft examining device has test section main body, and this test section main body has can knit for being arranged at
The gap that before the weaving action of cloth, neighbouring weft yarn passes through.It is provided with by possessing light emitting diode in test section main body across gap
Deng light-emitting component light-projecting portion and possess the photo detectors such as photodiode, phototransistor light accepting part constitute photoelectric transfer
Sensor.
The circuit of weft examining device is constituted as follows.The light-emitting component of light-projecting portion is connected to driving amplifier, in weft yarn
During detection, continuous illumination.The photo detector of light accepting part is connected to the input side of operational amplifier.Operational amplifier is connected
In peaker, peaker is connected to the amplifier that signal is amplified.Amplifier is connected to gain change circuit,
The gain that circuit can change amplifier is changed by gain.
If passed through the gap of test section main body by the weft yarn of wefting insertion, the light sending from light-emitting component is blocked, thus being subject to
Optical element output signal.The output signal of photo detector becomes the signal being amplified by operational amplifier defeated from operational amplifier
Go out.The period that the output of the output signal of operational amplifier is only blocked in light reduces.Peaker exports and by optical signal
The corresponding differential signal of rate of change.Differential signal is transfused to comparator, and is compared with the reference voltage of comparator.Benchmark electricity
Within pressure is set to the signal level of the photo detector obtained when weft yarn is by gap and others clutter composition causes
The above value of output.When the differential signal being transfused to comparator is more than reference voltage, comparator exports weft examining signal.
Patent documentation 1: Japanese Unexamined Patent Publication 8-337945 publication
In fluid jet type weaving machine disclosed in patent documentation 1, knitted with many colour stimulus specifications more than two kinds of colors
In the case of making, in weaving operation process, various weft yarns are by wefting insertion.If filling using with the weft examining employing optical facilities
The relation put substantially to distinguish weft yarn, then for example there is the weft yarn of light reflection system of easy reflected light as white yarn and such as black
The weft yarn of yarn easy light absorbing light absorbs system like that.Using arranging the weft yarn being made up of reflective photoelectric sensor towards reed
Detection means, in the case of the white yarn of wefting insertion and crape, photoelectric sensor exports the signal shown in Fig. 3.
In figure 3, in the case of white yarn, due to reflected light, so the light income being incident to the light of light accepting part is more, from
And the light accepting part of photoelectric sensor be output into than weft yarn reach before for example based on the reflected light from reed by optical signal r's
The high signal level of signal level by optical signal y1.On the other hand, in the case of crape, reflection is made due to the absorption of light
Light tails off, so the incident light quantity being incident to light accepting part is less, thus the light accepting part of photoelectric sensor is output into and arrives than weft yarn
The low signal level of the signal level by optical signal r before reaching by optical signal y2.Additionally, symbol w represents based on from warp thread
The reflected light of piece by optical signal.In addition, symbol t represents that weft yarn reaches the moment of the position of photoelectric sensor, symbol tl represents
During weft examining.
It is treated to as shown in Figure 4 be applied to specially by optical signal y1 by the photoelectric sensor obtained by the wefting insertion of white yarn
Circuit disclosed in sharp document 1.In the diagram, if weft yarn reaches the position of photoelectric sensor in moment t, photoelectric sensor
The high signal level of the signal level by optical signal r before reaching is exported than weft yarn during light accepting part tl during weft examining
By optical signal y1.The output signal of light accepting part is differentiated in peaker, and exports high-frequency signal a1.For high-frequency signal a1
For, because the light income in light accepting part is more, so with weft yarn reach the position of photoelectric sensor moment t simultaneously defeated
Go out initial become higher signal level by optical signal ha, produce in positive side.
The high-frequency signal a1 being output from peaker is exaggerated device and amplifies, and exports from amplifier and amplify signal b1.Separately
Outward, the initial amplification signal hb being outputted as positive side by optical signal ha.Amplify signal b1 to be carried out with threshold value s in a comparator
Relatively.The amplification signal b1 corresponding weft examining signal c1 of the comparator output level high with than threshold value s.Amplifying signal b1
In, due to initial be the signal level higher than threshold value s by optical signal ha corresponding amplification signal hb, so comparator output
Reach the weft examining signal by optical signal ha being initially output of the moment t of the position of photoelectric sensor based on weft yarn
ca.
On the other hand, it is processed as shown in Figure 5 by optical signal y2 by the photoelectric sensor obtained by the wefting insertion of crape
For being applied to the circuit disclosed in patent documentation 1.In Figure 5, for the light accepting part of photoelectric sensor, if weft yarn is in the moment
T reaches the position of photoelectric sensor, then export the signal by optical signal r before reaching than weft yarn during tl during weft examining
The low signal level of level by optical signal y2.The output signal of light accepting part is differentiated in peaker, and exports high frequency letter
Number a2.
For high-frequency signal a2, because the light income in light accepting part is less, so reaching photoelectric sensing with weft yarn
The moment t of the position of device be output simultaneously initial become relatively low level signal by optical signal la, and produce in minus side.From
The high-frequency signal a2 that peaker is output is exaggerated device and amplifies, and exports from amplifier and amplify signal b2.In addition, initial is subject to
Optical signal la is outputted as the amplification signal lb of minus side.Amplify signal b2 to be compared with threshold value s in a comparator.Comparator
Export the amplification signal b2 corresponding weft examining signal c2 of the level high with than threshold value s.
However, due to initial be the signal level lower than threshold value s by optical signal la corresponding amplification signal lb, so
It is not output from comparator with amplifying signal lb corresponding weft examining signal.Comparator with than the amplification signal lb being later than minus side
The amplification signal b3 of the high level of threshold value s producing accordingly initially exports weft examining signal c3.Thus, in light absorbs system
In crape, different from the white yarn of light reflection system, the comparator initially generation of the weft examining signal c3 of output becomes arrives than weft yarn
Reached photoelectric sensor position time delay in moment t1 moment.
The correct detection of weft yarn due in is for the operating of loom controls, particularly important, using during crape
Filling speed control for example in the case of fluid jet type weaving machine, before wefting insertion being closed to an end for the delay in weft examining moment
System, weft yarn due in control or the air injection control generation large effect from pilot jet.In filling speed control
In, because exceeding the filling speed at the end of wefting insertion, and it is susceptible to the rebound of weft yarn front end, staplings yarn, in weft yarn due in
In control, easily produce the deviation of the due in of weft yarn, in air injection control, produce and lead to the usage amount of fluid to increase
Deng rough sledding.
Content of the invention
It is an object of the invention to preventing the detection of the weft yarn of weft examining device from postponing.
Technical scheme 1 is a kind of weft examining device of loom, and it possesses to the path for being passed through by the weft yarn of wefting insertion
The photoelectric sensor of light accepting part composition of the light-projecting portion of the irradiation light and acceptance light from weft yarn reflection, taking-up are from above-mentioned photoelectric transfer
The output signal of sensor removes the signal that the low frequency of the signal of frequency of low frequency removes filtering mechanism and exceedes threshold value in input
When output weft examining signal comparison mechanism, the weft examining device of this loom is characterised by, removes filter in above-mentioned low frequency
Ripple mechanism and above-mentioned compare between mechanism setting all wave rectification mechanism.
According to technical scheme 1, due to all wave rectification is carried out to the high-frequency signal removing filtering mechanism taking-up from low frequency, so
Can be by the signal of the signal of the positive side being output in the case of the weft yarn of light absorbs system and minus side together as positive side
Rectified signal is taken out such that it is able in the same manner as the weft yarn of light reflection system, be replaced as the signal being compared with threshold value.Cause
This, can export and the reflected light of the weft yarn based on the region from the irradiation light reaching photoelectric sensor initial light
Signal corresponding weft examining signal.Thus, no matter using which kind of weft yarn, the detection that there is not weft yarn postpones, and can be based on
Weft examining signal, accurately carry out pilot jet fluid injection control, wefting insertion close to an end before weft yarn flight speed
Weft yarn due in control at the end of control or wefting insertion etc..
Technical scheme 2 is characterised by, it is high-pass filtering mechanism that above-mentioned low frequency removes filtering mechanism.According to technical scheme 2,
By optical signal, only take out the less radio-frequency component of clutter and carry out all wave rectification due to respect to photoelectric sensor, it is possible to
The detection preventing the weft yarn of light absorbs system postpones.
Technical scheme 3 is characterised by, it is bandpass filtering mechanism that above-mentioned low frequency removes filtering mechanism.According to technical scheme 3,
Because with respect to photoelectric sensor, by optical signal, the specific frequency content only taking out no clutter carries out all wave rectification, so
The detection being prevented from the weft yarn of light absorbs system postpones.
Technical scheme 4 is characterised by, removes in above-mentioned low frequency and arranges between filtering mechanism and above-mentioned all wave rectification mechanism
The enlarger of amplification can be changed.According to technical scheme 4, can will be removed filtering mechanism from low frequency and take simply to constitute
The signal going out zooms into the signal level of needs such that it is able to make the setting of threshold value become easy.
Technical scheme 5 is characterised by, the above-mentioned mechanism that compares possesses threshold value change mechanism.According to technical scheme 5, can be with
The mode given threshold consistent with the level being input to the signal comparing mechanism, can correctly carry out input signal and threshold value
Relatively.In addition, by combining it is not necessary to unnecessarily raise, reduce the level of threshold value with the enlarger that can change amplification,
Setting so as to make threshold value becomes easy.
The detection that the present invention is prevented from the weft yarn of weft examining device postpones.
Brief description
Fig. 1 is to represent the photoelectric sensor of weft examining device of air-jet loom and the block diagram of signal processing circuit.
Fig. 2 is the output wave in each portion that illustrates of detection action of the weft yarn of the light absorbs system to the circuit based on Fig. 1
The figure of shape.
Fig. 3 is to represent that light reflects being schemed by optical signal of the weft yarn of the weft yarn being and light absorbs system.
Fig. 4 is that the detection action of the weft yarn of the light reflection system to the circuit based on conventional weft examining device illustrates
The output waveform in each portion figure.
Fig. 5 is that the detection action of the weft yarn of the light absorbs system to the circuit based on conventional weft examining device illustrates
The output waveform in each portion figure.
Specific embodiment
Based on Fig. 1～Fig. 3, embodiments of the present invention are illustrated.Fig. 1 represents the polychrome more than using two kinds of colors
The weft examining device 1 that the air-jet loom of weft yarn is adopted.Additionally, illustrate in this specification examines to chintzing
The weft examining device 1 surveyed is not limited to be arranged at the situation of multiple-cob o r loom, also includes being arranged at a kind of latitude of color of wefting insertion
The situation of the loom of yarn.
In FIG, the weft yarn guide path 3 being arranged at the stretch nozzle 2 of slay (not shown) is constituted for by the latitude of wefting insertion
The path that yarn y passes through.Weft examining device 1 possesses using the photoelectric sensor 4 of reflective composition and as signal processing mechanism
Signal processing circuit 5.Photoelectric sensor 4 is made up of light-projecting portion 6 and light accepting part 7, and wherein, light-projecting portion 6 is by light emitting diode
Or others light source is constituted, light accepting part 7 is made up of photodiode or phototransistor etc..
Light-projecting portion 6 irradiates irradiation light l1 towards the weft yarn guide path 3 in the path becoming weft yarn y, and light accepting part 7 accepts reflection
Light l2.Reflected light l2, when there is not weft yarn y, becomes the reflected light from stretch nozzle 2, if weft yarn y reaches the area of irradiation light l1
Domain, then become the reflected light from weft yarn y, in addition, terminating in wefting insertion, stretch nozzle 2, to during stop direction movement, becomes warp thread piece
The reflected light of (not shown).
Light accepting part 7, in inventing problem one hurdle to be solved, as with reference to Fig. 3 explanation, reaches up to weft yarn y and irradiates
Till the moment t in the region of light l1, produce based on reflected light l2 from stretch nozzle 2 by optical signal.In the arrival of weft yarn y
Carve between t to tl during weft examining, light accepting part 7 produces based on reflected light l2 from weft yarn y by optical signal y1, y2.?
More than the light quantitative change of light accepting part 7 light reflection system for example wefting insertion is carried out for weft yarn y with white yarn in the case of produce be subject to optical signal
Y1, should by optical signal y1 become than based on reflected light l2 from stretch nozzle 2 by the high signal level of optical signal r.
The light absorbs system that the light income of light accepting part 7 tails off for example wefting insertion is carried out for weft yarn y with crape in the case of produce
Life is subject to optical signal y2, should be become more electric by the low signal of optical signal r than based on reflected light l2 from stretch nozzle 2 by optical signal y2
Flat.Additionally, in figure 3, in tl during weft examining, to during stop direction movement, light accepting part 7 accepts to be derived from stretch nozzle 2
Stronger reflected light l2 of warp thread piece, the signal level all high by optical signal y1, y2 of producing ratio weft yarn y by optical signal w.
The low frequency removing filtering mechanism as low frequency that light accepting part 7 is connected by signal processing circuit 5 removes filter circuit
8th, as the amplifying circuit 9 of enlarger, the full-wave rectifying circuit 10 as all wave rectification mechanism and as comparing mechanism
Comparator 11 is connected in series and constitutes.As long as low frequency removes the filtering that filter circuit 8 is as the mechanism that can remove low frequency
Circuit.For example, low frequency removing filter circuit 8 can be by the high-pass filtering circuit as the mechanism that can take out radio-frequency component
Or the bandwidth-limited circuit composition as the mechanism that can take out specific frequency content, in the present embodiment, to employ
The composition of high-pass filtering circuit illustrates.
The output signal that amplifying circuit 9 removes filter circuit 8 to low frequency is amplified.It is connected with conduct in amplifying circuit 9
The amplification change circuit 12 of amplification change mechanism, can amplify electricity by the adjustment operation change that amplification changes circuit 12
The amplification on road 9.The positive side to the high-frequency signal f (with reference to Fig. 2) being exaggerated and exporting from amplifying circuit 9 for the full-wave rectifying circuit 10
Composition and the composition of minus side carry out all wave rectification.
Comparator 11 is whole to threshold value s (with reference to Fig. 2) being set in advance and the all-wave being output from full-wave rectifying circuit 10
Stream signal fr (with reference to Fig. 2) is compared, and accordingly exports with the full wave rectified signal fr of the signal level becoming higher than threshold value s
Weft examining signal d (with reference to Fig. 2).The threshold value being connected with as threshold value change mechanism in comparator 11 changes circuit 13, can
The value of threshold value s is changed by the adjustment operation that threshold value changes circuit 13.
Additionally, in the present embodiment, due to being configured to fixed value given threshold s, by the amplification of amplifying circuit 9
The adjustment signal that can be compared with threshold value s of output, so threshold value change circuit 13 need not be arranged.In addition, contrary, inciting somebody to action
In the case that the amplification of amplifying circuit 9 is set as fixed value, due to can change the adjustment operation of circuit 13 by threshold value, come
The value of adjustment threshold value s, so amplification change circuit 12 can also be cancelled.
In addition, as shown in figure 1, changing circuit 12 and the composition of threshold value change circuit 13 both sides being provided with amplification
In, by changing amplification and the threshold value s both sides of amplifying circuit 9, the value of both sides can be set by minor adjustment, so as to
Enough avoid the significantly change of amplification, threshold value s.
In fig. 2, the letter to the weft examining device 1 in the case that wefting insertion is carried out for weft yarn y with the crape of light absorbs system
Number process illustrates.If weft yarn y reaches the region of irradiation light l1 of light-projecting portion 6 in moment t, light accepting part 7 receives and is derived from latitude
Reflected light l2 of yarn y, and the period output of tl is subject to optical signal y2 during weft examining.For by optical signal y2, due to
The weft yarn y that a part for irradiation light l1 is made up of crape absorbs, and so that the light quantity of reflected light l2 is reduced, so light accepting part 7
Light income reduces, thus signal level is than based on low by optical signal r from reflected light l2 of stretch nozzle 2 early than moment t.
The low frequency that is transfused to by optical signal y2 being output from light accepting part 7 removes filter circuit 8, and removes filtered electrical from low frequency
High-frequency signal f is taken out on road 8.Because the signal level by optical signal y2 is relatively low, so in high-frequency signal f, weft yarn y reach when
Carve initial being produced by optical signal lf of t in minus side.The high-frequency signal f being removed from low frequency removing filter circuit 8 is being exaggerated
Circuit 9 is transfused to full-wave rectifying circuit 10 after amplifying.
In full-wave rectifying circuit 10, take out the composition of positive side of high-frequency signal f and the composition of minus side, and whole from all-wave
Current circuit 10 exports full wave rectified signal fr.Thus, full-wave rectifying circuit 10 can be negative by being outputted as in high-frequency signal f
Initial being converted into initial full wave rectified signal hr by optical signal lf as positive signal and be drawn off of signal.
The full wave rectified signal fr being output from full-wave rectifying circuit 10 is transfused to comparator, by be set in comparator
11 threshold value s is compared.Result of the comparison in comparator 11, from comparator 11 and the signal level having higher than threshold value s
Full wave rectified signal fr accordingly export weft examining signal d.With initial corresponding by optical signal lf positioned at minus side
First full wave rectified signal hr is converted into the signal of the higher positive side of signal level, therefore with initial full wave rectified signal hr
Corresponding initial weft examining signal df is not output from comparator with not producing time delay.
Additionally, for example, with regard to the weft yarn y of the reflection of light as white yarn system, such as in the explanation of the prior art based on Fig. 4
Shown in as, higher by the signal level of optical signal y1, and there is not delay in weft examining signal c1, therefore
Do not carry out the explanation based on diagram.But, the signal processing circuit 5 of the weft examining device 1 of present embodiment, even light is anti-
Penetrate the weft yarn y being it is also possible to all wave rectification is carried out to by optical signal y1 (with reference to Fig. 3) by full-wave rectifying circuit 10, inhale with light
The weft yarn y receiving system similarly exports weft examining signal d.By exporting weft examining signal d from comparator 11, air injection is knitted
Machine continues weaving and runs.
Present embodiment is due to removing, to from low frequency, the high-frequency signal that filter circuit 8 is removed by full-wave rectifying circuit 10
F carries out all wave rectification, it is possible to by the signal of the positive side being output in the case of the weft yarn y of light absorbs system and minus side
Signal takes out such that it is able in the same manner as the weft yarn y of light reflection system, being replaced as can together as the full wave rectified signal of positive side
The signal being compared with threshold value s.
Therefore, it is possible to export the reflection with the weft yarn y based on the region from irradiation light l1 reaching photoelectric sensor 4
Light initial by the corresponding initial weft examining signal df of optical signal lf.Which kind of thus, no matter using weft yarn y, do not deposit
Postpone in the detection of weft yarn y such that it is able to be based on weft examining signal, accurately carry out the fluid injection control of pilot jet
System, wefting insertion close to an end before weft yarn flight speed control or wefting insertion at the end of weft yarn due in control etc..
In addition, removing filter circuit 8 by implementing low frequency in high-pass filtering circuit, can be with respect to photoelectric sensor 4
By optical signal y2, only take out the less radio-frequency component of clutter and carry out all wave rectification, thus preventing the inspection of the weft yarn y of light absorbs system
Survey and postpone.If in addition, implementing low frequency in bandwidth-limited circuit to remove filter circuit 8, can be with respect to the 4 of photoelectric sensor
By optical signal y2, only take out the no specific frequency content of clutter carry out all wave rectification such that it is able to prevent light absorbs system
Weft yarn y detection postpone.
In addition, in the present embodiment, possesses amplification change circuit 12 such that it is able to simple in amplifying circuit 9
Constitute and zoom into the signal level of needs such that it is able to make threshold value s by removing, from low frequency, the high-frequency signal f that filter circuit 8 takes out
Setting become easy.In addition, in the present embodiment, comparator 11 possess threshold value change circuit 13 such that it is able to with
Consistent mode given threshold s of the level of the signal of input comparator 11, and then can correctly carry out input signal and threshold value s
Comparison.In addition, amplification is possessed by combination and changing the amplifying circuit 9 of circuit 12 and possesses threshold value change circuit 13
Comparator 11 is it is not necessary to unnecessarily raising, reducing the level of threshold value s such that it is able to make the setting of threshold value become easy.
The present invention is not limited to the composition of above-mentioned embodiment, can carry out various in the range of the purport of the present invention
Change, can be implemented as follows.
(1) low frequency removes filter circuit 8 and is not limited to high-pass filtering circuit or bandwidth-limited circuit, as long as can remove low
Frequency is it is also possible to be implemented using other filter circuits.
(2) signal processing circuit 5 of weft examining device 1 can also be not whole in low frequency removing filter circuit 8 and all-wave
The composition of amplifying circuit 9 is set between current circuit 10.
(3) possess low frequency and remove filter circuit 8, amplifying circuit 9, full-wave rectifying circuit 10, comparator 11, amplification change
The signal processing circuit 5 as signal processing mechanism of more circuit 12 and threshold value change circuit 13 can be replaced as being equipped on
The software of computer and constitute.From the light accepting part 7 of photoelectric sensor 4 be output by optical signal y2 by the use of as signal processor
The software of structure, is processed in the same manner as the situation of signal processing circuit 5.
(4) weft examining device 1 is not limited to air-jet loom, can be in others such as water-jet loom, rapier looms
Implement in loom.
Description of reference numerals
1 ... weft examining device；2 ... stretch nozzles；3 ... weft yarn guide path；4 ... photoelectric sensors；5 ... signal processing electricity
Road；6 ... light-projecting portions；7 ... light accepting parts；8 ... low frequencies remove filter circuit；9 ... amplifying circuits；10 ... full-wave rectifying circuits；11…
Comparator；12 ... amplification change circuit；13 ... threshold value change circuit；D ... weft examining signal；The initial all wave rectification of df ...
Signal；F ... high-frequency signal；Fr ... full wave rectified signal；The initial full wave rectified signal of hr ...；L1 ... irradiation light；L2 ... reflects
Light；Lf ... initial by optical signal；The signal based on the reflected light of reed for the r ...；S ... threshold value；The due in of t ... weft yarn；tl…
During weft examining；The signal based on the reflected light of warp thread piece for the w ...；Y ... weft yarn；The light letter of the weft yarn of y1 ... light reflection system
Number；The weft yarn of y2 ... light absorbs system by optical signal.
Claims (5)
1. the weft examining device of a kind of loom, it possesses from the light-projecting portion to the path irradiation light for being passed through by the weft yarn of wefting insertion
And accept to constitute from the light accepting part of the light of weft yarn reflection photoelectric sensor, take out from the output signal of described photoelectric sensor
The low frequency removing the signal of frequency of low frequency removes filtering mechanism and exports weft examining when input exceedes the signal of threshold value
The comparison mechanism of signal, the weft examining device of this loom is characterised by,
Remove filtering mechanism in described low frequency and described compare between mechanism setting all wave rectification mechanism.
2. loom according to claim 1 weft examining device it is characterised in that
It is high-pass filtering mechanism that described low frequency removes filtering mechanism.
3. the weft examining device of loom according to claim 1 and 2 is it is characterised in that described low frequency removes filtering machine
Structure is bandpass filtering mechanism.
4. the loom according to any one of claims 1 to 3 weft examining device it is characterised in that
Remove the enlarger that setting between filtering mechanism and described all wave rectification mechanism can change amplification in described low frequency.
5. the loom according to any one of Claims 1 to 4 weft examining device it is characterised in that
The described mechanism that compares possesses threshold value change mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-141626 | 2015-07-15 | ||
| JP2015141626A JP6566756B2 (en) | 2015-07-15 | 2015-07-15 | Weft detection device for loom |
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| Publication Number | Publication Date |
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| CN106350927A true CN106350927A (en) | 2017-01-25 |
| CN106350927B CN106350927B (en) | 2019-01-04 |
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| CN201610545993.XA Expired - Fee Related CN106350927B (en) | 2015-07-15 | 2016-07-12 | The weft examining device of loom |
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| CN (1) | CN106350927B (en) |
Cited By (1)
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|---|---|---|---|---|
| CN109957872A (en) * | 2017-12-14 | 2019-07-02 | 株式会社丰田自动织机 | The weft detection of jet type loom |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3473976B1 (en) * | 2017-10-20 | 2019-09-25 | C.R.F. Società Consortile per Azioni | Deformation detecting device comprising a multi-functional fabric with flocked conductive weft yarns |
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| JPS6311193Y2 (en) * | 1985-06-21 | 1988-04-01 | ||
| US5206709A (en) * | 1991-09-23 | 1993-04-27 | Reed-Chatwood, Inc. | Apparatus for sensing yarn movement and for signaling breakage of the yarn |
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2015
- 2015-07-15 JP JP2015141626A patent/JP6566756B2/en not_active Expired - Fee Related
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2016
- 2016-07-12 CN CN201610545993.XA patent/CN106350927B/en not_active Expired - Fee Related
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| CN1151208A (en) * | 1994-04-27 | 1997-06-04 | 联邦科学及工业研究组织 | Method and apparatus for detemrining a first parameter(s) of an object |
| JP3246645B2 (en) * | 1995-06-07 | 2002-01-15 | 津田駒工業株式会社 | Loom weft detection device |
| CN1711474A (en) * | 2002-11-13 | 2005-12-21 | 乌斯特技术股份公司 | Device for scanning a thread by an optical beam |
| US20060164646A1 (en) * | 2002-11-13 | 2006-07-27 | Uster Technologies Ag | Device for scanning a thread by an optical beam |
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| CN204097667U (en) * | 2014-11-10 | 2015-01-14 | 南通职业大学 | Wireless weft examining controller |
| CN104499168A (en) * | 2014-12-19 | 2015-04-08 | 苏州盛运智能科技有限公司 | Intelligent weft signal detection method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109957872A (en) * | 2017-12-14 | 2019-07-02 | 株式会社丰田自动织机 | The weft detection of jet type loom |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017025419A (en) | 2017-02-02 |
| JP6566756B2 (en) | 2019-08-28 |
| CN106350927B (en) | 2019-01-04 |
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