CN101906684A - Device for measuring mass of movable fiber band - Google Patents
Device for measuring mass of movable fiber band Download PDFInfo
- Publication number
- CN101906684A CN101906684A CN2010102005586A CN201010200558A CN101906684A CN 101906684 A CN101906684 A CN 101906684A CN 2010102005586 A CN2010102005586 A CN 2010102005586A CN 201010200558 A CN201010200558 A CN 201010200558A CN 101906684 A CN101906684 A CN 101906684A
- Authority
- CN
- China
- Prior art keywords
- sliver
- measuring
- sensor element
- measurement
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/30—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting
Abstract
The inventive device for measuring mass of movable fiber band has a compression body for compressing a fiber band, a measuring channel located on the compression body for receiving the compressed fiber band, and a sensor part (13) arranged at a measuring channel for measuring of pressure that is exerted by the fiber band in the channel. The sensor part (13) comprises a scanning element (5) for recording of the pressure, and a measuring body (6) for measuring the pressure, that is in movable and distanced connection to the scanning element. The measuring body (6) is sealed relative to the measuring channel (14) to avoid the contamination of the measuring member (6).
Description
Technical field
The invention belongs to the spinning preparation field.According to the preorder of first claim, the present invention relates to a kind of device of measuring mass of movable fiber band.
Background technology
In cotton mill, open and clear up cotton fiber, and it is blended in fiber web or the wool.In carding machine, be coherent sliver with the fiber web reshaping.For the irregular place that exists is become evenly, with some slivers and bar assembly in guiding (in pairs) together, and with the sliver that obtains drafting once more.Can improve the sliver quality by combing.It is not only favourable but also commonly used to measure the sliver quality.Measuring-signal can be evaluated to calculate the qualitative characteristics of sliver, and for example sliver number, sliver prop up number variation, quality inequality, spectrogram, short slub etc., or can be used for controlling the sliver quality.The device that is used to measure the quality of sliver or thickness the most at large is based on the glossal canal principle or measure head of the trumpet.
According to the glossal canal principle, sliver is guided between two cylinders, and drum shaft is parallel to each other, and can move mutually.A cylinder has groove along its periphery, another cylinder and this engagement.The thickness of sliver changes the variation that causes two cylinder axle bases, and also this distance is measured in permission.U.S. Pat-4,232,447A provides an embodiment of this class device.
For second kind of device of known models, sliver is compacted in measurement head of the trumpet that narrows down along the sliver direct of travel or loudspeaker, and is directed in the measurement passage of measuring on the head of the trumpet.Because the constant volume of unit length of having measured path setting is applied to thickness or the quality that the pressure of measuring on the conduit wall depends on the unit length sliver by sliver.But working pressure sensor or force sensor measuring pressure.In U.S. Pat-4,864, a kind of measurement mechanism is disclosed among the 853A.Pressure sensor in this patent document is designed to the measuring stick of leaf spring.Measuring stick contacts with sliver by little pressure plare, so that it depends on that the sliver thickness departs from more or less.These four strain ga(u)ges that depart from by being applied on the measuring stick are converted into the signal of telecommunication.Another parts of leaf spring are sandwiched between two parts of measuring head of the trumpet.U.S. Pat-4,864, the device among the 853A has various shortcomings.Sliver rubs on little pressure plare and can produce frictional heat, and this frictional heat is absorbed by measuring stick and dissipates thus, and the temperature fluctuation meeting in the measuring stick that causes thus produces adverse influence to the accuracy and the repeatability of measuring-signal.U.S. Pat-4,864, the 853A demonstration can be attached to hygrosensor on the measuring stick, and uses its signal compensation temperature fluctuation, however this is a kind of not only cost height but also complicated makeshift.If little pressure plare is depleted owing to wearing and tearing or damages, then must change measuring stick, this can raise the cost again, and jeopardizes the repeatability of measurement result.In addition, the clamping installation of leaf spring can cause producing the unmanageable mechanical stress of not expecting in measuring stick.
U.S. Pat-5697247A and US-5461757A have overcome above-mentioned shortcoming to small part in the following manner, be about to the sensor element that directly contacts with sliver and the actual measurement component partial that mechanical input signal is converted to electrical output signal is separated, even also they are spaced from each other.The described device of last file comprises guide groove, and this guide groove is by fixed part and can forming with respect to the displaceable parts of this fixed part dislocation.Displaceable parts are fixed on the carrier that can depart from, and the measurement member such as strain ga(u)ge wherein is installed, and are used to measure the dislocation situation of displaceable parts.Back one file discloses rotatably mounted lever-like sensor element, and its first arm contacts with sliver in the sliver loudspeaker, and second arm is conflicted by spring.Be engaged with measuring cell on second arm, this measuring cell is designed to plunger armature/coil instrument.The shortcoming of stream oriented device is that they comprise sensor element, and this sensor element carries out relative to big moving with respect to stationary element during measuring.Between each sensor element and stationary element, must there be enough big gap, moves to allow carrying out this class.The sliver fiber can be wiped by hook in this gap.If can not in time handle, fiber stains the entail dangers to apparatus function.Thus, this device is a kind of maintenance intensive type device.
Summary of the invention
Therefore, the objective of the invention is the existing known devices of further exploitation, can partly overcome above-mentioned shortcoming at least.Particularly should solve the contamination problem.This device should have stable short-term performance and long-term behaviour and good measurement result repeatability.The maintenance and repair of device should be not only simply but also cost low.
Can realize these and other purpose by the device of in first claim, determining of the present invention.Advantageous embodiment has been described in detail in detail in appended claims.
The present invention is to measure the basis that is envisioned for of member with respect to measuring channel seal.Term in presents " sealing " or " sealing " are understood that some mode, these modes can avoid not expecting from measuring passage to the material migration of measuring member, the especially migration of fiber or other solids, or limit this migration at least.By sealing, be positioned near its measurement member and electronic circuit by actual package.The measurement mechanism that is made of measurement member and electronic circuit forms closed system.Can make measurement member and electronic circuit avoid staiing thus.Employed potted component must be enough pliable and tough or flexible, so that it can allow the minute movement of sensor element at least, these minute movement are essential for measurement.If the mode that is moved with reality by measurement mechanism is measured the sliver applied pressure in measuring passage, then can simplify this class sealing means.Being displaced into of sensor element is very little.
Therefore, the device of measurement mass of movable fiber band of the present invention comprises the compacting member that is used for the compacting sliver, is positioned at and is used to receive the measurement passage of compacting sliver on the compacting member and is positioned to measure be used to measure the measurement mechanism of exerting pressure at the sliver of measuring passage on the passage.Measurement mechanism comprises contact and being received in sliver machinery to be measured the sensor element that the sliver in the passage exerts pressure and is used for gaging pressure and with the sensor element flexible connection but the measurement member that is separated from each other.It is sealed with respect to measuring passage to measure member.
Sensor element preferably is embedded in the opening of measurement mechanism cover plate.Thus, at least by the gap of flexible sealing element sealing between opening and sensor element.This flexible sealing element for example can be made by silicones or rubber.Can use the single annular sealing that is designed to.Can advantageously design the surface that makes sensor element and face sliver, this surface flushes installation with lid surface basically, and this lid surface is also in the face of sliver.
In a preferred embodiment, measurement mechanism is not measured sliver applied pressure in measuring passage in fact there to be the mode that moves.This stroke that for example means sensor element is less than 0.5mm, and preferably less than 0.2mm." stroke " is meant the maximum deviation of sensor element here, promptly do not have sliver sensor element the position and be subjected to difference between the position of the sensor element that the maximum pressure of sliver conflicts.The approximately little order of magnitude of departure ratio range of the sensor element that is caused by the inequality of sliver quality during measuring, promptly this departs from usually less than 0.05mm, preferably less than 0.02mm.
Preferably will measure member designs and become to have the measuring spring of at least one strain ga(u)ge.Measuring spring can have four strain ga(u)ges especially, and when with certain power conflict measuring spring, wherein two are compressed, and two other is stretched.Preferably be incorporated in the measuring bridge to strain ga(u)ge of major general.At least mechanically design measuring spring, so that it has two orthogonal symmetry axis.Compare with the prior art level, but adopt the influence of high symmetric measuring spring significantly reduce temp fluctuation measuring spring.
Measure the floating of member the influence that can further reduce temperature fluctuation is installed.This class floating is installed or suspention also has the advantage that can avoid measuring the mechanical stress in the member.
Preferred device of the present invention has to be attached to measures near the amplifier of member, is used to measure the low level signal amplification of member electrical output signal.The electromagnetism glitch that can avoid thus long lead is received together amplifies together with measuring-signal, and avoids making a false report measuring-signal or overlapping thereon.Therefore, the integration of measurement member and amplifier can obtain the good insulation to the interference of electromagnetism glitch.
Device of the present invention is applicable to textile machinery, for example carding machine, drawing frame and the combing machine in spinning preparation assembly.The output signal of measuring member is the quality measurements of per unit length sliver.Can assess this result, to be used to assess the qualitative characteristics of sliver, for example sliver number, sliver prop up number variation, quality inequality, spectrogram, short slub etc.It is nominal value that measuring-signal also is used in the control loop of open or sealing the sliver quality control.
Device of the present invention also has following advantage especially:
Can make measurement member and electronic component avoid staiing
Sturdy and durable, not fragile
Be actually and do not have portable measurement, no moving-member
Simple structure
Need not to use other hygrosensors, can have excellent temperature stability
Have highly stable short-term and long-term behaviour
Need not to connect compressed air type cooling or cleaning plant
Measuring-signal has high frequency response ability and high dynamics
Might measure the qualitative variability of extremely short sliver
The cost of producing and safeguarding is low
Has good linear relationship between pressure and the output signal
The signal resolution infinite height
Description of drawings
Hereinafter will be described in more detail a preferred embodiment of the present invention by accompanying drawing.
Fig. 1 shows the vertical section of apparatus of the present invention.
Fig. 2 shows the sensor element of apparatus of the present invention, wherein: (a) front view; (b) side view; And (c) vertical view.
Fig. 3 is the exploded view of sensor element.
Fig. 4 is the front view of the element of sensor element.
Fig. 5 is the side schematic view of the measuring spring that departs from of apparatus of the present invention.
Fig. 6 is the vertical view of measuring spring.
Fig. 7 is the circuit diagram that is used for the bridgt circuit of evaluate sensor signal.
Fig. 8 is the schematic diagram of the characteristic line of apparatus of the present invention.
The specific embodiment
Fig. 1 shows an embodiment of apparatus of the present invention 1, is used to measure the quality of sliver 10.Device 1 comprises sliver loudspeaker or head of the trumpet 11, sliver compacting parts 12 and sensor element 13.Sliver 10 is moved by the y direction that arrow 101 indicates along it.After in access to plant 1, sliver 10 is compacted in sliver loudspeaker 11, and the narrow measurement passage 14 between sliver compacting parts 12 and sensor element 13 of passing through.Sensor element 13 comprises measurement mechanism, is used to measure sliver 10 applied pressures in measuring passage 14.Element by Fig. 1 device shown 1 corresponds essentially to U.S. Pat-4,864, those elements among the 853A.Accompanying drawing depicted in greater detail subsequently sensor element 13, and this sensor element 13 is different from prior art basically.
Fig. 2 shows three kinds of different views of sensor element 13, and some of them element to small part is drawn with transparent way, so that also can show the element of back.Fig. 3 is the exploded view of sensor element 13.Plane cover plate 3 is in the face of sliver 10 (not showing in Fig. 2 and Fig. 3).Cover plate 3 together constitutes cover plate 3 together with frame lower part 8.Frame lower part 8 and cover plate 3 are linked together by two trip bolts 82.Two are used for the screw hole 83 that sliver compacting parts 12 are fixed on the sliver loudspeaker 11 is passed two parts 3,8.Sensor element 13 is fixed on the sliver head of the trumpet 11 by another screw 84.
Thin lobate measuring spring 6 is positioned at the below of sensor element 5.It is made by the metal such as spring steel.Measuring spring 6 separates with sensor element 5, but flexibly connects with it, and this for example flexibly connects and can realize by two location flat head screws 51.The end of location flat head screw 51 is arranged in the measuring spring 6 of suitable locating aperture 67.Contact surface between location flat head screw 51 and the measuring spring 6 should be as far as possible little, so that the least possible heat is transmitted on the measuring spring 6 from sensor element 5, and locatees flat head screw 51 and can be made by heat insulator.Preferably measuring spring 6 is not clamped on two static bars 9 that for example have circular cross section, and fastening without screw, but mounted thereto in floating mode, these two static bars 9 are arranged in the frame lower part 8 of groove 85.Install or suspention by the floating of measuring spring 6, can guarantee that it is not subjected to the influence of the mechanical stress of generation when fastening, and guarantee that temperature fluctuation does not influence its output signal.
The mode of action by Fig. 4-8 explanation apparatus of the present invention.
Fig. 4 is presented at measuring spring 6 that floating is installed on the static bar 9 and the sensor element 5 that flexibly connects by location flat head screw 51 and measuring spring 6.Fig. 5 illustrates when measuring spring 6 is loaded that Fig. 6 is the vertical view of measuring spring 6 with respect to the departing from of zero line 60.The sliver 10 (not drawing in Fig. 4) that is compacted in measuring passage 14 is to sensor element 5 p that exerts pressure.Pressure p is converted into power F (referring to Fig. 5) by the surface of sensor element 5, and this power F is transmitted on the measuring spring 6 by location flat head screw 51.Can find out obviously that by Fig. 5 and Fig. 6 can imagine measuring spring 6 and be made up of three element stems 61-63, these bars are parallel to each other, and interconnect by web 64 in the middle.The two local power F/2 that applied by location flat head screw 51 are bent downwardly the end of inner part bar 62, and by each counter-force-F/2 that static bar 9 applies the end of exterior part bar 61,63 are bent upwards.Because measuring spring 6 bendings make the measuring spring material surface strain occur.Can adopt four strain ga(u)ge 65.1-65.4 of optimal placement to detect this surface strain.Thus, be compressed at two strain ga(u)ges 65.1 and 65.3 that are positioned under every kind of situation on the exterior part bar 61,63, and two strain ga(u)ges 65.2 and 65.4 that are positioned on the inner part bar 62 are stretched.
The preferred electric wire that adopts interconnects four strain ga(u)ge 65.1-65.4, and is integrated in the measuring bridge 71 such as full bridge circuit, as shown in Figure 7.By electric input adapter 66.1 and 66.2 constant electricity work voltage U is applied on the measurement bridge 71.Measure the output voltage V of bridge 71 by electric out splice going splice 663,66.4 taps.
Show that at the arrow above the resistance 65.1-65.4 resistance of each strain ga(u)ge is to become big (↑) still diminish (↓) under loading situation shown in Figure 5 among Fig. 7.For obtaining the good interference insulation to electromagnetic interference signal, making output voltage V will be favourable near measuring bridge 71 as far as possible.For example can realize on circuit board 7 that small-signal amplifies (referring to Fig. 3).Output voltage V depends on the resistance of strain ga(u)ge 65.1-65.4, and these resistance depend on power F.Embodiments of the invention in this discussion have linear characteristic on the pressure p on a large scale.Fig. 8 summary shows this class linear characteristic line 72, promptly shows the output voltage V with respect to pressure p.
Avoid measuring spring 6 that overstrain takes place by bearing 81, and avoid it to be stain by potted component 4, this bearing 81 for example can be made of the bottom of frame lower part.By making measuring spring have big symmetry and the floating installation of measuring spring 6 on static bar 9, can greatly reduce the influence of temperature fluctuation with respect to prior art to measuring spring 6 with respect to two orthogonal symmetry axis 68 and 69.The symmetry of measuring spring 6 also allows with two kinds of different modes it to be installed in the frame lower part 8, thereby can same measuring spring 6 be installed in two different frame lower parts, these two different frame lower parts are by the installation of horizontal dimple 86 different each other (referring to Fig. 3).Thus, can be by simply obtaining to have the device 1 of different geometries with mode cheaply.
Certainly, the invention is not restricted to embodiment discussed above.Those skilled in the art can infer other variant forms according to the present invention, and these variant forms also belong to theme of the present invention.
List of reference numbers
1 device
11 sliver head of the trumpet
12 sliver compacting parts
13 sensor elements
14 measure passage
10 slivers
101 sliver moving directions
3 cover plates
31 cover plate openings
4 potted components
5 sensor elements
51 location flat head screws
6 measure member, measuring spring
60 zero lines
The exterior part bar of 61,63 measuring spring
The inner part bar of 62 measuring spring
The web of 64 connecting rod parts
65.1-65.4 strain ga(u)ge
66.1-66.4 electric connection
67 locating apertures
68,69 symmetry axis
7 equipment circuit boards
71 measure bridge
72 characteristic lines
8 frame lower parts
81 bearings
82 trip bolts
83 holes
85 static bar grooves
The horizontal dimple that 86 plugs and sockets connect
9 static bars
F power
P pressure
The U operating voltage
The V output voltage
Claims (14)
1. device (1) of measuring mobile sliver (10) quality comprising:
The compacting member (11) that is used for the described sliver of compacting (10);
Be positioned at the measurement passage (14) that (11) on the described compacting member are used to receive described compacting sliver (10); And
Be positioned at be used on the described measurement passage (14) measuring the described sliver (10) of described measurement passage (14) the measurement mechanism (13) of exert pressure (p);
Wherein said measurement mechanism (13) comprising:
Sensor element (5) is used for machinery contact described sliver (10) and is received in the described pressure (p) that the described sliver (10) in the described measurement passage (14) applies; And
Measure member (6), be used to measure described pressure (p), and with described sensor element (5) is movable, being separated by is connected;
It is characterized in that:
Described measurement member (6) is sealed with respect to described measurement passage (14).
2. device as claimed in claim 1 (1), wherein said sensor element (5) are embedded in the opening (31) of cover plate (3) of described measurement mechanism (13).
3. device as claimed in claim 2 wherein uses at least one flexible sealing element (4) to seal gap between described opening (31) and the described sensor element (5).
4. device as claimed in claim 3 (1), wherein said at least one potted component (4) is made by silicones or rubber.
5. as claim 3 or 4 described devices (1), one of them potted component (4) is designed to annular.
6. according to a described device among the claim 2-5, wherein basic flush with in described cover plate (3) in the face of the surface of the described sensor element (5) of described sliver (10), and this surface of described cover plate (3) is also in the face of described sliver (10).
7. according to a described device in the aforementioned claim, wherein said measurement mechanism (13) is not measured the described pressure (p) that the described sliver (10) in described measurement passage (14) applies in fact there to be the mode that moves.
8. device as claimed in claim 7, the stroke of wherein said sensor element (5) be less than 0.5mm, and preferably less than 0.2mm.
9. according to the device (1) described in the aforementioned claim, wherein said measurement member (6) is designed to have at least the measuring spring of a strain ga(u)ge (65.1-65.4).
10. device as claimed in claim 9 (1), wherein said measuring spring (6) has four strain ga(u)ges (65.1-65.4); When described measuring spring (6) was applied in conflict power (F), wherein two (65.1,65.3) were compressed, and other two (65.265.4) are stretched.
11., wherein be incorporated in the measuring bridge (71) to a strain ga(u)ge of major general (65.1-65.4) as claim 9 or 10 described devices (1).
12. according to the described device (1) among the claim 9-11, wherein said sensor element (5) is designed to the little pressure plare that contacts with described sliver (10), and flexible connection between described sensor element (5) and the described measuring spring (6) and spacing realize by at least one location flat head screw (51), and this location flat head screw (51) is received in the locating aperture (67) in the described measuring spring (6).
13. according to the described device (1) in the aforementioned claim, wherein said measurement member (6) is mounted in floating mode.
14. the textile machinery in spinning preparation assembly such as carding machine, drawing frame or combing machine, the device with the quality that can measure the sliver (10) that moves through described textile machinery,
It is characterized in that:
Described device is the device (1) described in a kind of aforementioned claim one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH00868/09 | 2009-06-04 | ||
| CH00868/09A CH701226A1 (en) | 2009-06-04 | 2009-06-04 | Device for measuring mass of fiber band that is moved by e.g. drawing frame, in spinning outwork, has measuring body co-acting with scanning element and distanced from scanning element for measuring of pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101906684A true CN101906684A (en) | 2010-12-08 |
| CN101906684B CN101906684B (en) | 2013-08-28 |
Family
ID=43262262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010200558 Expired - Fee Related CN101906684B (en) | 2009-06-04 | 2010-06-02 | Device for measuring mass of movable fiber band |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101906684B (en) |
| CH (1) | CH701226A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947256A (en) * | 2014-03-31 | 2015-09-30 | 苏州科技学院 | Device for detecting unevenness of wool tops |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0584652A2 (en) * | 1992-08-24 | 1994-03-02 | Carl Schenck Ag | Transducer for measuring mechanical loads |
| US5461757A (en) * | 1993-04-02 | 1995-10-31 | Trutzschler Gmbh & Co. Kg | Apparatus for measuring the sliver density at a tapering sliver guide in a drafting frame |
| CN201096559Y (en) * | 2007-10-19 | 2008-08-06 | 东华大学 | Flock carding force dynamic detection device |
| CN201138263Y (en) * | 2008-01-12 | 2008-10-22 | 练可为 | Multipurpose pressure detecting construction |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3204463A (en) * | 1962-09-18 | 1965-09-07 | Taber Instr Corp | Force operated instrument |
| JPH0913237A (en) * | 1995-06-29 | 1997-01-14 | Zellweger Luwa Ag | Apparatus for obtaining thickness or unevenness of sliver |
-
2009
- 2009-06-04 CH CH00868/09A patent/CH701226A1/en not_active Application Discontinuation
-
2010
- 2010-06-02 CN CN 201010200558 patent/CN101906684B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0584652A2 (en) * | 1992-08-24 | 1994-03-02 | Carl Schenck Ag | Transducer for measuring mechanical loads |
| US5461757A (en) * | 1993-04-02 | 1995-10-31 | Trutzschler Gmbh & Co. Kg | Apparatus for measuring the sliver density at a tapering sliver guide in a drafting frame |
| CN201096559Y (en) * | 2007-10-19 | 2008-08-06 | 东华大学 | Flock carding force dynamic detection device |
| CN201138263Y (en) * | 2008-01-12 | 2008-10-22 | 练可为 | Multipurpose pressure detecting construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104947256A (en) * | 2014-03-31 | 2015-09-30 | 苏州科技学院 | Device for detecting unevenness of wool tops |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101906684B (en) | 2013-08-28 |
| CH701226A1 (en) | 2010-12-15 |
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Granted publication date: 20130828 Termination date: 20140602 |