CN1530310A - Apparatus for detecting tension of yarn and yarn sensor - Google Patents
Apparatus for detecting tension of yarn and yarn sensor Download PDFInfo
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- CN1530310A CN1530310A CNA200410039658XA CN200410039658A CN1530310A CN 1530310 A CN1530310 A CN 1530310A CN A200410039658X A CNA200410039658X A CN A200410039658XA CN 200410039658 A CN200410039658 A CN 200410039658A CN 1530310 A CN1530310 A CN 1530310A
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- receiving element
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- 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
- D01H13/26—Arrangements facilitating the inspection or testing of yarns or the like in connection with spinning or twisting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/105—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using electro-optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/28—Traversing devices; Package-shaping arrangements
- B65H54/2806—Traversing devices driven by cam
- B65H54/2809—Traversing devices driven by cam rotating grooved cam
- B65H54/2812—Traversing devices driven by cam rotating grooved cam with a traversing guide running in the groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
- B65H54/28—Traversing devices; Package-shaping arrangements
- B65H54/2884—Microprocessor-controlled traversing devices in so far the control is not special to one of the traversing devices of groups B65H54/2803 - B65H54/325 or group B65H54/38
- B65H54/2887—Microprocessor-controlled traversing devices in so far the control is not special to one of the traversing devices of groups B65H54/2803 - B65H54/325 or group B65H54/38 detecting the position of the yarn guide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/40—Applications of tension indicators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
A sensor (4) determines the presence of yarn at a distance (h) from the traverse (2), where h lies between 2H/3 and 5H/6, H being the distance between the moving and stationary traverse guides. A further sensor (3) indicates the position of the traverse guide (10) and hence the end position of the yarn. The yarn tension is calculated (5,6) from the apparent propagation velocity of the transverse wave. An Independent claim is also included for an optical reflective sensor (4) to detect the presence of yarn. It comprises several angled pairs of light emitters and receivers (4a,4b) with intersecting optical axes. The points of intersection are arranged to cover yarn movement perpendicular to the traverse plane by using the summation of the reflected light signals.
Description
The application is dividing an application of No. the 00117655.2nd, Chinese patent application.
Technical field
The present invention relates to a kind of device that is used for detecting yarn tension and a kind of be suitable for being used in be used for producing the equipment of yarn or the Yarn senser in the similar devices.
Background technology
A kind of device that is used for detecting yarn tension at the equipment that is used for synthetic threads production or other equipment is known, and open in Japanese unexamined patent publication (Kokai) No.H10-305966.
The above device that is used for detecting yarn tension comprises: a yarn position sensor, be provided at the upstream side of a traverse gear, and be used for detecting in yarn because the shear wave that the motion of traverse gear produces; A thread-carrier position transduser is arranged near the traverse gear, is used for detecting the position of thread-carrier; Measurement mechanism, be used for according to the moment that produces from shear wave to by the time cycle of yarn position sensor to the moment of shear wave, measure the apparent propagation speed of the shear wave that produces by traverse gear; And computer device, be used for according to the gait of march of yarn and the apparent propagation speed of shear wave, calculate the true propagation speed of shear wave.
Be used for detecting in the said apparatus of yarn tension, according to time difference and the distance between yarn position sensor and thread-carrier position transduser between the yarn detection signal that sends respectively from yarn position sensor and thread-carrier position transduser, the crest that the shear wave that measurement is produced by the crank motion of traverse gear repeats to change, and calculate yarn tension by observed reading then.
First problem in being used for detecting the said apparatus of yarn tension is: if the distance between yarn position sensor and thread-carrier position transduser is less, then Measuring Time becomes too short so that can not get wishing the measuring speed of precision, unless the time measurement precision is raise.
And second problem is: when the laterally steering device was put upside down it, yarn tension raise on the transient motion direction, and the value that increases is measured as the mean tension value.
In addition, the 3rd problem is: if the yarn position transducer arrangements must be near the summit guides, thereby the distance between yarn position sensor and guides position transduser becomes longer, to solve first and second problems, then less and cause that yarn rests in the detection range of yarn position sensor at the yarn displacement of yarn inspection positions, can not detect the sweep of yarn thus definitely.
If the midway location place of yarn position transducer arrangements between summit guides and traverse gear, then since the unexpected divertical motion of traverse gear apicad the guides sweep of propagating the shear wave in yarn of (on updrift side) become big, yarn is easy to contact and pasting yarn position sensor friction with the yarn position sensor thus, causes the adverse effect of yarn qualities or cause not entering detection range and that yarn is detected is invalid.This is the 4th problem.
The yarn position sensor comprises a Yarn senser that has a luminous element and a light receiving element, and be arranged in a position between summit guides and the laterally steering device, thereby light beam is transmitted on the yarn from the outer of thread path plane that comprises laterally steering device and summit guides.
Yet, because the yarn of advancing from summit guides to laterally steering device vibrates at the sense of motion of laterally steering device and perpendicular direction, if so thread density and/yarn tension within the specific limits, then yarn may be mostly moves on perpendicular to the sense of motion of transverse guidance device.
If set up a kind of like this state, thread path departs from from the detectable region of luminous element and light receiving element, so that the yarn detection is invalid.
If can not detect yarn, then be judged as unusually measuring tension value, this causes such problem: when carrying out yarn qualities when controlling according to measuring tension value, have normal quality the yarn possible errors be categorized as and have anomalous mass.
Summary of the invention
Thereby, the object of the present invention is to provide and a kind ofly can accurately measure mean tension and do not reduce the tension detecting device of yarn qualities, the influence that the tension force that this mean tension is not subjected to be caused by the yarn cross motion raises.
Another object of the present invention is, a kind of Yarn senser is provided; Even at yarn along level with perpendicular to the direction of the sense of motion of laterally steering device and under the situation about departing from respect to this Yarn senser, this paper money line sensor also can be surveyed yarn reliably.
In order to realize above purpose, the invention provides a kind of device that in having summit guides that guides yarn and the wrapping head that causes the reciprocating traverse gear of yarn, is used for detecting yarn tension, described device comprises: a yarn position sensor, be provided between summit guides and the traverse gear, be used for detecting the shear wave that the motion by traverse gear produces in yarn; A thread-carrier position transduser is arranged near the traverse gear, is used for detecting the position of guiding yarn; Measurement mechanism, be used for according to from produce by traverse gear shear wave constantly to by the yarn position sensor to the shear wave time cycle constantly, measure the apparent propagation speed of shear wave; And computer device, be used for according to the gait of march of yarn and the apparent propagation speed of shear wave, calculate the true propagation speed of shear wave.The device that is used for detecting yarn tension is characterised in that: the yarn position transducer arrangements is a position of satisfying 2H/3＜h＜5H/6 relation, wherein " h " is the distance between traverse gear and yarn position sensor, and " H " is the distance between summit guides and the traverse gear.
Yarn senser according to the present invention comprises housing and is arranged in many to luminous element and light receiving element in the housing, and described luminous and light receiving element has corresponding optical axis.Yarn senser is characterised in that, intersect at a primary importance place at the optical axis of the luminous element of a centering and optical axis at the light receiving element of a described centering, the optical axis of a light receiving element intersects the optical axis of another light receiving element of adjacent described light receiving element location at a second place place, the optical axis of a light receiving element intersects the optical axis of another light receiving element of adjacent described light receiving element location one the 3rd position, the distance in described housing and the described second and the 3rd position between each is greater than the distance between described housing and described primary importance.
Description of drawings
With reference to accompanying drawing, make the present invention become clearer by the following description of most preferred embodiment, in the accompanying drawings:
Fig. 1 is a scheme drawing, shows a kind of device that is used for detecting yarn tension according to first embodiment of the invention;
Fig. 2 shows an example of Fig. 1 traverse gear;
Fig. 3 shows the Yarn senser with luminous element and light receiving element;
Fig. 4 is a scheme drawing, shows when the shear wave propagation in yarn when a direction is moved of laterally steering device;
Fig. 5 is a scheme drawing, shows the propagation of shear wave in yarn when the laterally steering device in the opposite direction moves;
Fig. 6 is a scheme drawing, is used for showing when the shear wave propagation in yarn when a direction is moved of laterally steering device;
Fig. 7 is a scheme drawing, shows the relation of yarn position sensor with respect to the thread path that extends from the summit guides to the yarn sweep;
Fig. 8 is a scheme drawing, is used for showing the relation of yarn position sensor with respect to the thread path that extends from the yarn sweep to the laterally steering device;
Fig. 9 is a scheme drawing, shows from the output wave of thread-carrier position transduser and from the relation between the output wave shape of yarn position sensor;
Figure 10 is a scheme drawing, shows the yarn tension in cross motion;
Figure 11 is a scheme drawing, shows the outside expansion of yarn sweep in round;
Figure 12 is a scheme drawing, shows the yarn detection range of yarn position sensor;
Figure 13 is a scheme drawing, shows the state of kinematic motion of yarn on the direction of traversing;
Figure 14 is a block diagram, shows the Yarn senser according to second embodiment of the invention;
Figure 15 is a scheme drawing, shows the relation of the position between the luminous element and light receiving element in a sensor unit;
Figure 16 is a scheme drawing, shows in the Yarn senser shown in Figure 14 in the position of (between light receiving element) between luminous element relation;
Figure 17 is a scheme drawing, shows the relation of the position between luminous element and light receiving element in the Yarn senser shown in Figure 14;
Figure 18 is a scheme drawing, shows the yarn detection range in the Yarn senser shown in Figure 14;
Figure 19 is a scheme drawing, shows the yarn detection range in the Yarn senser shown in Figure 14;
Figure 20 is a scheme drawing, shows the yarn detection range in the Yarn senser shown in Figure 14;
Figure 21 is a scheme drawing, shows the yarn detection range of two sensor units;
Figure 22 is a scheme drawing, shows the yarn detection range of two sensor units;
Figure 23 is a scheme drawing, shows the yarn detection range of two sensor units;
Figure 24 is a scheme drawing, shows the yarn detection range of prior art Yarn senser;
Figure 25 is a scheme drawing, shows the Yarn senser that is arranged in according to the present invention in the yarn wrapping head;
Figure 26 is a scheme drawing, shows when the position between luminous element and the light receiving element to concern the yarn detection range that obtains when inappropriate; And
Figure 27 is a scheme drawing, shows the relation of the out of position between luminous element and light receiving element in the Yarn senser shown in Figure 14.
The specific embodiment
Fig. 1 is a scheme drawing, shows a kind of according to an embodiment of the invention device that is used for detecting yarn tension.The device that is used for detecting yarn tension is arranged in a summit guides 1 that has a guiding yarn and the wrapping head that makes the reciprocal traverse gear of yarn 2.This device comprises: a yarn position sensor 4, be arranged between summit guides 1 and the traverse gear 2, and be used for detecting the shear wave that the motion by traverse gear 2 produces in yarn; A thread-carrier position transduser 3 is arranged in and is used for detecting near the traverse gear 2 of yarn guide position; Measurement mechanism 5, be used for according to from moment of producing shear wave by traverse gear to by the time cycle of yarn position sensor to the moment of shear wave, measure the apparent propagation speed of shear wave; Computer device 6 is used for according to the gait of march of yarn and the apparent propagation speed of shear wave, calculates the true propagation speed of shear wave; And an I/O interface 15, be used for sending a tension signal.
The propagation speed of shear wave is a yarn displacement perpendicular to the kinematic velocity on the yarn direct of travel.
Thread-carrier position transduser 3 comprises a reflective photoelectric sensor or a capacitance type transducers, and detects the phase place of the yarn leader of the guides 10 that traverses.
I/O interface 15 is connected to one by on its input yarn dimensions, yarn gait of march or other keyboard 19, then is connected to if necessary to be used on the CRT monitor 16 and chopping machine 17 of print data.
Much less, the calculating of carrying out separately in aforementioned calculation circuit 12, speed calculation circuit 13 and tension force computing circuit 14 can be carried out in single computer device.
Computer software can be used for carrying out above calculating, rather than hardware circuit.
To explain the tension force detection calculations of Yarn tension detection apparatus below.
When yarn 100 was walked between summit guides 1 and traverse gear 2, thread-carrier position transduser 3 detected traverse guide 10 when laterally steering device 10 arrives transverse ends C ', and sends a signal.
And, detect yarn 100 by the yarn position sensor 4 between a C and some A, as shown in Figure 3.In Fig. 3, yarn position sensor 4 comprises a light receiving element 4b who has the luminous element 4a of lens and have lens, and the such surveyed area that defines shown in pressing.
The profile of Fig. 4 to 6 expression yarn 100 is to show the horizontal wave propagation in yarn 100.Fig. 4 represents when laterally steering device 10 shear wave propagation in yarn 100 when direction F moves.Fig. 5 represents when laterally steering device 10 propagation in yarn 100 when direction F moves.Fig. 6 be illustrated in a kind of some be different from the pattern of Fig. 4, when laterally steering device 10 shear wave propagation in yarn 100 when direction F moves.Yarn position sensor 4 is suitable for detecting the yarn 100 in Fig. 5 state.
In winding yarn 100, laterally steering device 10 generally moves with the speed of approximately constant, and laterally steering device 10 locates to put upside down its sense of motion at lateral ends B ' or C ', is attended by unexpected deceleration and acceleration.Because a kind of so unexpected variation produces a kind of shear wave, and upwards propagate to summit guide 1 as yarn 100 medium and small curvature bending part D; The shape of yarn 100 be when laterally steering device 10 with constant speed from a B ' to the corresponding first of shape of putting C ' when motion and yarn 100 and one when laterally steering device 10 with constant speed from a C ' when putting B ' and move and the corresponding second portion sum of shape of yarn 100, sweep D is formed between it.
Therefore, might arrange the yarn position sensor 4 that has luminous element 4a and light receiving element 4b in such a way, thereby when yarn position sensor 4 is positioned on the thread path that summit guides 1 is connected to sweep D, reflecting bundle is aimed at light receiving element 4b basically so that receive the amount maximum of bundle, as shown in Figure 7, and when yarn position sensor 4 is positioned on the thread path of the A ' point that sweep D is connected to laterally steering device 10 with angle φ, reflecting bundle do not aim at light receiving element 4b so that receive the bundle amount less, as shown in Figure 8.
Even between sweep D and the yarn position sensor 4 apart from the luminous and optical receiving region E of δ at luminous element 4a and light receiving element 4b in change, by detecting the variation of the signal that sends from yarn position sensor 4, might guarantee to detect the passage of sweep D, because signal is affirmed than little before the passage of sweep D after the passage of sweep D.
Angle φ be preferably in from 10 the degree to 30 the degree scopes in, and apart from δ in the scope of 10mm to 30mm.
Fig. 9 represents from the output wave shape of thread-carrier position transduser 3 with from the output wave shape of yarn position sensor 4, the relation shown in waveform has.
The time difference detecting circuit 11 in, calculate from detect by thread-carrier position transduser 3 shear wave the time be carved into the time cycle t1 that detects the moment of shear wave by yarn position sensor 4, and by its interval travel time output as shear wave.
In computing circuit 12, according to the interval travel time t1 of shear wave and the distance L (m) between traverse gear 2 and thread-carrier position transduser 3, use following relation to calculate the apparent propagation speed Vo (m/sec) of shear wave.
Vo＝L/t1
Then apparent propagation speed Vo (m/sec) is outputed to computer device 6, and in speed calculation circuit 13, according to the apparent propagation speed Vo (m/sec) of shear wave and the true propagation speed V (m/sec) of the following relation calculating of yarn gait of march Va (m/sec) use shear wave.In this respect, the yarn gait of march can be yarn speed of wrap or upstream side yarn delivery speed.
If use the yarn speed of wrap, then might be by improving speed of wrap, considering that lateral angles θ presses following raising precision: Va=speed of wrap * 1/cos θ.
Va can perhaps directly import the speed of wrap that is detected by the speed sensor that is installed on the wrapping head through keyboard 19 inputs.
If thread-carrier position transduser 4 is arranged in the upstream of traverse gear 2 on the meaning of yarn direct of travel, then the true propagation speed V (m/sec) of shear wave is represented by V=L/t1+Va, if and thread-carrier position transduser 4 is arranged in the downstream of traverse gear 2 on the meaning of yarn direct of travel, then represent by V=L/t1-Va.
When the true propagation speed V of shear wave that is calculated by speed calculation circuit 13 is input to tension force computing circuit 14, use following formula to calculate yarn tension T (Kgf) according to the true propagation speed V of shear wave and yarn weight (linear density) ρ (Kg/m) of per unit length:
T＝ρV
2/9.807
In this example, arrange above-mentioned Yarn tension detection apparatus like this, thereby the distance H between summit guides 1 and traverse gear 2 is 0.46m, transducer arrangements angle φ with respect to thread path is 20 degree, and between sweep D and yarn position sensor 4, be 20mm apart from δ, and detect yarn tension with respect to the polyester multifilament (75d/36f) with 0.008g/m yarn weight (thread density), this polyester multifilament twines with the speed of wrap of cross motion with 4800m/min.In the actual tension measurement range, the propagation speed of shear wave is in the scope of 30m/s to 100m/s.
When measuring propagation speed, distance between traverse gear 2 and the yarn position sensor 3 is under the situation of 0.31m therein, Measuring Time " t " is in 0.01 second to 0.0031 second scope, this means that 0.00003 second resolution is essential in order to obtain being used for the Measurement Resolution of 1m/sec propagation speed.On the contrary, if the distance h between traverse gear 2 and yarn position sensor 3 is 0.1m, then Measuring Time " t " is in 0.003 second to 0.001 second scope, this means that 0.00001 second resolution is essential for the Measurement Resolution of the propagation speed that obtains being used for 1m/sec.
In other words, under the situation that resolution is identical, if distance becomes three times, then the Measurement Resolution of speed trebles therein.
As shown in Figure 10, yarn tension when laterally steering device 10 is put upside down its sense of motion during cross motion raises, if wherein distance h is 0.1m, then measuring tension force is 15.5g, if and distance h is 0.31m, then measuring tension force is 14.2g, this means that distance h is big more, and the ratio of instantaneous tension force rising and other tension values in measuring period is more little.Therefore, might obtain rational mean tension.
Has a kind of propagation path that wherein sweep outwards expands during the yarn cross motion, as shown in Figure 11.When distance h was 0.1m and 0.31m, swell increment was about 10mm.In contrast, when distance h was 0.2m, the maximum of expansion reached about 20mm.Because but the detection range of yarn position sensor 4 is in the scope of 5mm to 15mm, as shown in Figure 12, but yarn may be run out of detection range, the inefficacy that causes yarn to detect, perhaps cause contacting with yarn position sensor 4, cause the adverse effect to yarn qualities, at this moment distance h is 0.2m.
If distance h is 0.4m, then yarn displacement is about 15mm, as shown in Figure 13, but and yarn can always remain in the detection range of yarn position sensor 4, this means that sweep is not detectable.On the other hand, if distance h is 0.38m, then yarn displacement becomes 20mm, but surpasses the detection range of yarn position sensor 4, causes the reliable Detection of sweep.
When distance h is 0.4m, is so short in sensor fwd yarn movement scope, thereby after detecting sweep D, may causes that wrong yarn detects immediately by the backward wave of sensor from summit guides 1.
In view of these problems, in the distance h between traverse gear 2 and the yarn position sensor 4 should the scope at 0.31m to 0.38m.
Secondly, suppose that the distance H (m) between summit guides 1 and traverse gear 2 is 0.3m.If the distance h between traverse gear 2 and yarn position sensor 4 is 0.2m, then, compares and double so the resolution of measuring speed and distance h wherein are the situations of 0.1m because the time that will measure doubles.And, have been found that when distance h is 0.2m, obtain the more reasonable mean tension value of 15.3g.In this respect, under latter event, the mean tension value is 16.2g.
The deflection of thread path is 8mm when distance h is 0.2m, is 15mm when distance h is 0.15m, and is 10mm when space h is 0.24m, is 16mm when h is 0.26m.When space h is 0.25m or more for a long time, have that a kind of wherein yarn does not enter measured zone and the situation that causes faulty operation.
Suppose that the space H between summit guides 1 and traverse gear 2 is 0.6.If the space h between traverse gear 2 and the yarn position sensor 4 is 0.4m, the resolution of measuring speed and space wherein are that the situation of 0.1m is compared and become about four times, because the time that will measure is four times.And, have been found that when distance h is 0.4m, obtain the more reasonable mean tension value of 14.2g.In this respect, under latter event, the mean tension value is 15.5g.
The deflection of thread path is 12mm when distance h is 0.4m, is 22mm when distance h is 0.3m, is 39mm when distance h is 0.46m, and is 16mm when distance h is 0.55m.When distance h is 0.5m or more for a long time, have that a kind of wherein yarn does not enter measured zone and the situation that causes faulty operation.
In view of these problems, yarn position sensor 4 best as close as possible summit guidess 1 are arranged, thereby rationally mean tension is detectable, and the outside distortion of thread path guarantees to enter the surveyed area of yarn position sensor 4.
As mentioned above, following formula must be satisfied in the position (position of yarn position sensor) that detects the shear wave place of the yarn of advancing,
2H/3＜h＜5H/6
Wherein h is the distance between traverse gear 2 and the position that detects the yarn signal place (position of Yarn senser), and H is the distance between summit guides 1 and traverse gear 2.
Because be used for detecting the device of yarn tension is suitable for according to the present invention, thereby be used for detecting the advance yarn signal detection position of shear wave in the yarn and be positioned at the scope of 2H/3＜h＜5H/6, can guarantee to keep the measuring period and the survey precision of necessity, and need not improve the resolution that be used for propagation speed for the purpose that improves velocity resolution.And, owing to keep necessary measuring period, so might reduce the unexpected rising of yarn tension when the laterally steering device is reverse, rationally the mean tension value is a failure-free thus, and obtains exactly in the adverse effect of avoiding yarn tension to raise suddenly.And, owing in proper range, select the yarn movement distance,, cause the reliable Detection of yarn sweep, and do not reduce yarn qualities so the yarn stop in the surveyed area of yarn position sensor is evitable with yarn with contacting of sensor.
Figure 14 is a block diagram, shows the Yarn senser 41 according to second embodiment of the invention.Yarn senser 41 can be as the yarn position sensor 4 of Fig. 1.Label 50a indicates the yarn of advancing.
Yarn senser 41 comprises that one of them first sensor unit 43, second sensor unit 44 and one the 3rd sensor unit 45 are arranged to the housing 42 of delegation.
First sensor unit 43 comprises a luminous element 46a, light receiving element 47a, and amplifier 48a.Luminous and light receiving element 46a and 47a are arranged in the housing 42, as shown in Figure 15 with the angle [alpha] between it 1.The axis of luminous element 46a is in the axes intersect of an I1 place and light receiving element 47a.Lens 9a and 10a are provided at respectively on luminous and light receiving element 46a and the 47a.In Figure 15 and 16, long and short dash line is indicated the optical axis of luminous and light receiving element.
Second sensor unit 44 has the structure identical with first sensor unit 43, and makes luminous and light receiving element 46b and 47b are arranged in the housing 42 with angle [alpha] 1.The axis of luminous element 46b is in the axes intersect of an I2 place and light receiving element 47b.In addition, the luminous element 46b (light receiving element 47b) of the luminous element 46a of first sensor unit 43 (light receiving element 47a) and second sensor unit 44 arranges with the angle [alpha] between it 2, as shown in Figure 16 and 17, the luminous element 46b of second sensor unit 44 is at the optical axis intersection of the luminous element 46a of P place, a position and first sensor unit 43 thus, and the optical axis of the light receiving element 47b of second sensor unit 44 is at the optical axis intersection of the light receiving element 47a of Q place, a position and first sensor unit 43, in the distance between position P or Q and the housing 42 greater than the distance between position I1 or I2 and housing 42.
The 3rd sensor unit 45 also has the structure identical with first sensor unit 43, and makes luminous and light receiving element 46c and 47c are arranged in the housing 42 with angle [alpha] 1.The axis of luminous element 46c is in the axes intersect of an I3 place and light receiving element 47c.In addition, luminous element 46c and light receiving element 47c arrange with the angle [alpha] between it 2, the optical axis of the luminous element 46c of the 3rd sensor unit 45 is at the optical axis intersection of the luminous element 46b of the P place, a position and second sensor unit 44 thus, and the optical axis of the light receiving element 47c of the 3rd sensor unit 45 is at the optical axis intersection of the light receiving element 47b of the position Q place and second sensor unit 44, in the distance between position P or Q and the housing 42 greater than the distance between position I1 or I3 and housing 42.
Figure 17 shows the relation between luminous element 46a, 46b and 46c and light receiving element 47a, 47b and the 47c, wherein solid line indication optical axis.
In this arrangement, the distance between the position I3 at the position I1 at the optical axis place of intersecting each other of luminous element in first sensor unit 43 and light receiving element and luminous element in the 3rd sensor unit 45 and the light receiving element place of intersecting each other is 14mm.
Figure 18 shows the light quantity of being sent by luminous element and measure at position I1, I2 and I3 place.Curve level axle among Figure 18 is corresponding to the X-axis of the coordinate that is included in position I1, I2 among Figure 14 and I3.The light quantity of first sensor unit 43 is by character 101 indications, and the light quantity of second sensor unit 44 is by character 102 indications, and the light quantity of the 3rd sensor unit 45 is by character 103 indications.The light summation of three sensor units is by character 104 indications.
Figure 19 shows and comprises position I1 but move on respect to the X-axis Z-direction+the similar light quantity distribution along X-axis that the some place of 5mm is measured, and Figure 20 shows and moves on respect to the Z-direction of X-axis-similar distribution that the some place of 5mm is measured.
Figure 21 shows the light quantity distribution along X-axis that comprises position I1 when two pairs of sensor units are used in the embodiments of the invention layout.Figure 22 shows on respect to the Z-direction of X-axis and moves+similar distribution that the some place of 5mm is measured, and Figure 23 shows and moves on respect to the Z-direction of X-axis-similar distribution that the some place of 5mm is measured.
In contrast, Figure 24 show in prior art Yarn senser (only using a pair of luminous element and light receiving element), corresponding with position I1 or I3, comprise of the distribution of the intersection location of luminous element optical axis and light receiving element optical axis along the light quantity of X-axis.
By Figure 18,21 and 23 obvious, sensor unit is many more, but detection range is wide more on perpendicular to the sense of motion of transverse guidance device.
As shown in Figure 25, Yarn senser 41 is arranged between the laterally steering device 10 of summit guides 1 and yarn wrapping head, thereby light beam is transmitted on the yarn in the direction that generally is parallel to this plane by its outside from the thread path plane that comprises motion laterally steering device 10 and summit guides 1.The polyester multifilament (75d/36f) of advancing and traversing as the speed VW that uses with 3300m/min to 4800m/min, thereby winding angle is 4 degree to 9 degree when (speed of traversing Vt=VW * tan θ), might detect yarn reliably by the Yarn senser that has two sensor units with by the Yarn senser that has three sensor units.
And, the polyester multifilament (250d/36f) of advancing and traversing as the speed VW that uses with 3300m/min to 4800m/min, thus winding angle is 4 degree when 9 spend, might be as in the above situation, detecting yarn reliably.
In Yarn senser 41, if between the axis of adjacent two luminous elements or the angle between the axis of adjacent two light receiving elements (vertical angles of angle α 2) less than 1 the degree, then optical axes crosspoint is from luminous far away excessively with optical axis intersection zone light receiving element, thereby have not detectable region is arranged in measured zone, as shown in Figure 26.Therefore, in order to eliminate not detectable region, wish luminous less with angle of cut light receiving element, to move detectable region to position P, if but the traverse measurement zone then is difficult to detect thinner yarn, because the light value that is transmitted into yarn square reducing by distance.
As shown in Figure 27, if the angle between the axis of two adjacent light emissions or receiving element is greater than 25 degree, then the position P that intersects each other at the optical axis of emission of two adjacent light or receiving element transmits and receives element than position I1, I2 and the close light of I3 at corresponding luminous element and the corresponding light receiving element place of intersecting each other, thereby detectable region is at position P place non-expansion.And the detection distance between first sensor unit 43, second sensor unit 44 and the 3rd sensor unit 45 expands widely with respect to position I1 to I3 on (+) Z-direction of principal axis, so detectable region does not occur.
In view of above problem, the angle between the axis of two adjacent luminous elements or two adjacent light receiving elements is preferably in the scope from 1 degree to 25 degree.In order to improve the yarn accuracy of detection, this angle better, is preferably in from 4 degree to the scope of 6 degree in from 3 degree to the scope of 10 degree.
The intersect each other position of indication in this article of optical axis is light-emitting zone and the surveyed area position at place that overlaps each other basically, and is not limited to accurately the intersect each other point at place of optical axis.
Certainly, Yarn senser of the present invention can be used as the yarn disconnection detector.
According to Yarn senser of the present invention, many luminous element and light receiving element are so arranged, thereby in the optical axis of a luminous element and adjacent its position at optical axis intersection place of another luminous element, a position at the optical axis intersection place of the light receiving element that is adjacent with optical axis and another at a light receiving element, position shrinking away from theshell body than the place that intersects each other at the optical axis of luminous element and light receiving element is farther, and therefore, might widen the yarn surveyed area, and detecting yarn reliably, also is like this even yarn is advanced perpendicular to the sense of motion of laterally steering device.
Claims (4)
1. be used for detecting the reflection-type Yarn senser of yarn, described sensor comprises:
A housing; With
Be arranged in many to luminous element and light receiving element in the housing, described luminous and light receiving element has corresponding optical axis;
Wherein intersect at a primary importance place at the optical axis of the luminous element of a centering and optical axis at the light receiving element of a described centering, the optical axis of a light receiving element intersects at a second place place adjacent to the optical axis of another light receiving element of described light receiving element location, the optical axis of a light receiving element intersects the optical axis of another light receiving element of adjacent described light receiving element location one the 3rd position, the distance in described housing and the described second and the 3rd position between each is greater than the distance between described housing and described primary importance.
2. reflection-type Yarn senser according to claim 1 wherein saidly manyly is arranged in delegation to luminous element and light receiving element, thereby described luminous element is arranged in the plane, and described light receiving element is arranged in the plane.
3. reflection-type Yarn senser according to claim 1 is wherein said many to comprising three pairs.
4. reflection-type Yarn senser according to claim 1, the optical axis of the optical axis of one of them light receiving element and another light receiving element of arranging adjacent to described light receiving element is with an angle of intersection, described angle from 1 degree to the scopes of 25 degree.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11149344A JP2000337980A (en) | 1999-05-28 | 1999-05-28 | Tension detecting device |
| JP149344/1999 | 1999-05-28 | ||
| JP11149345A JP3016781B1 (en) | 1999-05-28 | 1999-05-28 | Yarn detector |
| JP149345/1999 | 1999-05-28 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001176552A Division CN1168647C (en) | 1999-05-28 | 2000-05-26 | Device for testing yarn tension and yarn sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1530310A true CN1530310A (en) | 2004-09-22 |
| CN100351156C CN100351156C (en) | 2007-11-28 |
Family
ID=26479262
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410039658XA Expired - Lifetime CN100351156C (en) | 1999-05-28 | 2000-05-26 | Apparatus for detecting tension of yarn and yarn sensor |
| CNB001176552A Expired - Lifetime CN1168647C (en) | 1999-05-28 | 2000-05-26 | Device for testing yarn tension and yarn sensor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001176552A Expired - Lifetime CN1168647C (en) | 1999-05-28 | 2000-05-26 | Device for testing yarn tension and yarn sensor |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100633554B1 (en) |
| CN (2) | CN100351156C (en) |
| DE (1) | DE10025046B4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319951B (en) * | 2007-06-08 | 2011-09-28 | 株式会社丰田自动织机 | Yarn tension detector and weft tension detecting device of injection weaving machine |
| CN110411639A (en) * | 2019-08-30 | 2019-11-05 | 浙江致信智控装备有限公司 | A kind of tension sensor of yarn |
| CN114351345A (en) * | 2021-12-24 | 2022-04-15 | 福建睿能科技股份有限公司 | Flat knitting machine and detection method thereof |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10257997B4 (en) * | 2002-12-12 | 2005-11-24 | Memminger-Iro Gmbh | Yarn gauge, especially for transient applications |
| GB0323906D0 (en) * | 2003-10-11 | 2003-11-12 | Bandara Palitha | Instrument for measuring the tension in a textile yarn using non-contact sensing |
| DE102004016072B4 (en) * | 2004-03-30 | 2007-11-29 | Siemens Ag | Measuring device for measuring the tension of warp threads of a loom and method for determining the tension of the warp threads of a loom |
| JP2012153476A (en) * | 2011-01-25 | 2012-08-16 | Murata Machinery Ltd | Yarn winding device |
| JP2014019541A (en) * | 2012-07-18 | 2014-02-03 | Murata Mach Ltd | Yarn monitoring device and yarn winder |
| CN102965827A (en) * | 2012-12-13 | 2013-03-13 | 慈溪太阳洲纺织科技有限公司 | Yarn tension detection device for knitting machine |
| DE102016009062A1 (en) * | 2016-07-26 | 2018-02-01 | Saurer Germany Gmbh & Co. Kg | Fadenchangiereinrichtung comprising an electric motor drive and a finger thread guide |
| CN108691086A (en) * | 2018-06-07 | 2018-10-23 | 广东南豆科技有限公司 | A kind of Yarn guide mechanism with traction seat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4335603A (en) * | 1980-08-13 | 1982-06-22 | Beloit Corporation | Sonic measurement of web tension |
| JPH02209371A (en) * | 1989-02-08 | 1990-08-20 | Murata Mach Ltd | Tension measuring device for running yarn |
| FI89537C (en) * | 1992-01-09 | 1993-10-11 | Soundek Oy | Measuring device for measuring the tensile stress of an optical fiber or corresponding wire |
| JPH06117948A (en) * | 1992-10-02 | 1994-04-28 | Toray Ind Inc | Method and equipment for measuring tension |
| JPH08301530A (en) * | 1995-05-09 | 1996-11-19 | Toray Eng Co Ltd | Winder driving control method |
| EP0761585B1 (en) * | 1995-09-06 | 2000-02-02 | Zellweger Luwa Ag | Yarn sensor |
| DE19544202B4 (en) * | 1995-11-28 | 2007-01-04 | Saurer Gmbh & Co. Kg | Method and device for adjusting a yarn tension present in a textile machine according to a rake tensioner |
| JP3439648B2 (en) * | 1997-03-03 | 2003-08-25 | 東レエンジニアリング株式会社 | Yarn tension measuring device |
| US5996925A (en) * | 1997-03-03 | 1999-12-07 | Toray Engineering Co., Ltd. | Method and apparatus for detecting yarn tension and method for winding yarn |
-
2000
- 2000-05-18 DE DE10025046A patent/DE10025046B4/en not_active Expired - Lifetime
- 2000-05-26 KR KR1020000028691A patent/KR100633554B1/en not_active IP Right Cessation
- 2000-05-26 CN CNB200410039658XA patent/CN100351156C/en not_active Expired - Lifetime
- 2000-05-26 CN CNB001176552A patent/CN1168647C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319951B (en) * | 2007-06-08 | 2011-09-28 | 株式会社丰田自动织机 | Yarn tension detector and weft tension detecting device of injection weaving machine |
| CN110411639A (en) * | 2019-08-30 | 2019-11-05 | 浙江致信智控装备有限公司 | A kind of tension sensor of yarn |
| CN110411639B (en) * | 2019-08-30 | 2024-04-09 | 浙江致信智控装备有限公司 | Tension sensor for yarn |
| CN114351345A (en) * | 2021-12-24 | 2022-04-15 | 福建睿能科技股份有限公司 | Flat knitting machine and detection method thereof |
| CN114351345B (en) * | 2021-12-24 | 2023-08-29 | 福建睿能科技股份有限公司 | Flat knitting machine and detection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100351156C (en) | 2007-11-28 |
| CN1275522A (en) | 2000-12-06 |
| KR100633554B1 (en) | 2006-10-16 |
| KR20010039623A (en) | 2001-05-15 |
| DE10025046A1 (en) | 2001-01-04 |
| DE10025046B4 (en) | 2007-12-27 |
| CN1168647C (en) | 2004-09-29 |
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