CN101550622A - A yarn motion state detection method and device thereof - Google Patents
A yarn motion state detection method and device thereof Download PDFInfo
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- CN101550622A CN101550622A CNA2009100988405A CN200910098840A CN101550622A CN 101550622 A CN101550622 A CN 101550622A CN A2009100988405 A CNA2009100988405 A CN A2009100988405A CN 200910098840 A CN200910098840 A CN 200910098840A CN 101550622 A CN101550622 A CN 101550622A
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Abstract
A yarn motion state detection method is characterized in that a parallel light area directly produced by a light-emitting unit is provided, a light receiving unit detects the motion state of the yarn in the parallel light area; the yarn is loaded to a spinning machine through the parallel light area; a photosensitive surface relative to the light receiving unit, confirms the lighting intensity variation in the parallel light area caused by the moving yarn in a fixed time interval, and a variable electrical signal is produced based on the lighting intensity variation in the parallel light area; in a fixed time interval, the electrical signal changes relative to the reference signal, to generate an output signal specifying the motion state of the yarn; operating members of the spinning machine receive the output signal and implement the shutdown or normal operation functional instructions. Compared with the existing technology, the invention uses a method of changing the optical signal intensity into electrical signal to achieve the detection of the motion state of the yarn, the detection method makes the circuit structure more simple and the detecting process easier, which not only reduces design costs but also improves the detection efficiency.
Description
Technical field
The present invention relates to a kind of detection method of yarn motion state and use the device of this detection method.
Background technology
Spinning machine needs to detect the motion state of yarn in the course of the work, in case detect yarn stop motion or broken yarn then need timely main control system stall, weaves lining defectives such as broken hole, broken needle or hand pick are arranged to prevent to form because of broken yarn.
In the prior art, as the patent No. is that the Chinese invention patent " being decided the method and the device of the state in the weaving loom by yarn movement before the optical sensor " of ZL92104754.1 (notification number is CN1052209C) discloses a kind of be used for determining the to be admitted to yarn movement of textile machinery or the method and apparatus of halted state, this patent adopts tested yarn is positioned over optical transmitting set and the middle method of photoelectric sensor, produce the signal of telecommunication according to the shape of yarn and the variation of position, and operate the functional unit of weaving loom by this signal of telecommunication.But the detection method that adopts above-mentioned patent is to determine the motion state of yarn by the shape of front and back yarn or position, the algorithm relative complex that relates to shape or position probing, and need use comparatively expensive PSD sensor, because the projected area of yarn own is little, when actual detected, can only rely on induction zone length that increases the PSD sensor or the quantity that increases light-emitting tube to strengthen the actual induction district of yarn, because the high output impedance and the low signal amplitude of this PSD sensor, the advance signal amplifying circuit there is very high requirement, and more insensitive for tiny yarn.
And for example the patent No. is that the Chinese utility model " a kind of yarn motion state photoelectric detection system " of ZL200820082364.9 relates to a kind of yarn motion state photoelectric detection system, this device detects yarn in non-contacting mode, in the same side of yarn Optical Transmit Unit and light receiving unit are set, the emitted angle that light and tested yarn constituted of Optical Transmit Unit is λ, the angle that reflection ray and tested yarn constituted is β, and light receiving unit converts the luminous intensity of reflection ray to voltage signal and is delivered to the voltage signal processing module.This patent is realized detection to yarn motion state by the mode that optical signal is converted to the signal of telecommunication, detection method than last patent is simple, but, in this patent, Optical Transmit Unit and light receiving unit are positioned at the same side of yarn, in order effectively to detect the motion state of yarn, the angle λ of emission light and yarn need reasonably be set, accept angle beta and this Several Parameters of light emissive porwer of light and yarn, particularly higher for angle λ and angle beta designing requirement, increased design difficulty, and the also trouble comparatively of process of debugging angle when detecting, therefore, await to do further improvement.
Summary of the invention
First technical problem to be solved by this invention is that a kind of detection method that makes the more simple and yarn motion state that detect easily of circuit structure is provided at above-mentioned prior art present situation.
Second technical problem to be solved by this invention provides a kind of device of realizing the detection method of described yarn motion state, and this apparatus structure is simple, cost is low, can generally be used for the detection to the motion state of various yarns.
The present invention solves the technical scheme that first technical problem adopts: a kind of detection method of yarn motion state, described yarn have at an Optical Transmit Unit and between the light receiving unit of photosensitive surface moves, and it is characterized in that:
A directional light zone that is directly produced by described Optical Transmit Unit is set, and described light receiving unit detects the motion state of described yarn in this directional light zone;
Described yarn is sent into spinning machine by described directional light zone, and this yarn by described directional light zone with can move freely;
The photosensitive surface of described relatively light receiving unit, the intensity variation in yarn caused described directional light zone in Fixed Time Interval that affirmation is moved based on the intensity variation in this directional light zone, produces a variable signal of telecommunication;
In Fixed Time Interval, the described signal of telecommunication is with respect to the variation of reference signal, and generation one indicates the output signal of described yarn motion state;
The functional unit of described spinning machine receives described output signal and carries out the operational order of shutdown or operate as normal.
Because yam surface is not smooth, yarn its surperficial optical characteristics in motion process can constantly change thereupon, in order to obtain the changes in optical properties value of this yam surface, described reference signal is corresponding to the signal of current state with respect to the yarn conditions before the described Fixed Time Interval, described Fixed Time Interval can be as far as possible little, to improve the precision that detects.
The present invention solves second technical scheme that technical problem adopted: this device includes the light receiving unit that an Optical Transmit Unit and that can produce directional light has photosensitive surface, wherein, described Optical Transmit Unit includes the lens that an optical transmitting set and with wide cut firing angle is arranged on this optical transmitting set the place ahead, the optical signal of described optical transmitting set emission promptly forms described directional light zone through described lens, the freely-movable in this directional light zone of described yarn, the photosensitive surface of described light receiving unit directly receives the optical signal in described directional light zone, and the intensity variation in the directional light zone that described light receiving unit receives described light receiving unit by a testing circuit is converted to the output signal of the described yarn motion state of indication.
As preferably, described optical transmitting set can be common Light-Emitting Diode or infrarede emitting diode, described light receiving unit is twin PIN type photodiode, and the interference of adopting twin PIN type photodiode can effectively avoid surround lighting to change improves accuracy of detection.
As preferably, described testing circuit can be core with the single-chip microcomputer, also include amplifier, first electric capacity and second electric capacity, wherein, the anode of described light emitting diode links to each other with dc power anode, the negative electrode of this light emitting diode links to each other through the P1.7 pin of the 4th resistance and described single-chip microcomputer, the negative electrode of first photodiode of described PIN type photodiode links to each other with described direct positive source, the anode one tunnel of this first photodiode is through first resistance eutral grounding, another road links to each other through the negative input of described first electric capacity and described amplifier, the negative electrode of second photodiode of described PIN type photodiode links to each other with described dc power anode, the anode one tunnel of this second photodiode is through second resistance eutral grounding, the electrode input end of another road second electric capacity and described amplifier links to each other, the output of described amplifier links to each other through the P3.2 pin of the 5th resistance and described single-chip microcomputer, the negative input of described amplifier links to each other through the output of the 3rd resistance and this amplifier, and the control signal end that the P1.2 pin of described single-chip microcomputer produces described output signal and spinning machine links to each other.Consider that amplifier only just can produce triggering signal when positive-negative input end has pressure reduction, the interference of adopting twin PIN type photodiode can avoid the variation a little less than the environmental light intensity to cause as light receiving unit improves the reliability that detects.
Described light receiving unit can as preferably, can also adopt silicon photocell for existing various photosensitive components and parts, and silicon photocell has and the identical characteristic of twin PIN type photodiode, and the interference that can avoid surround lighting to change improves accuracy of detection.
Compared with prior art, the invention has the advantages that: adopt light signal strength is converted to the detection of the method realization of the signal of telecommunication to yarn motion state, the detection of light signal strength can be adopted existing various photosensitive components and parts, photosensitive components and parts are compared to the position and imageing sensor obtains more easily and cost is lower, and practicality is stronger; And, detection method of the present invention is by the yam surface change of optical property, and promptly yarn movement and the intensity variation that causes are as detection signal, and testing circuit only need be analyzed the signal input whether intensity variation is arranged in Fixed Time Interval, if have, then yarn is the proper motion state, if do not have, then yarn is for stopping or the broken yarn state, this detection method makes circuit structure more simple, testing process is more prone to, and has not only reduced design cost, has also improved detection efficiency.
Description of drawings
Fig. 1 is the structural representation of the yarn checkout gear of the embodiment of the invention.
Fig. 2 is the yarn testing circuit schematic diagram of the embodiment of the invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, structural representation for the yarn checkout gear of the embodiment of the invention, this device includes and lays respectively at the light receiving unit 2 that Optical Transmit Unit 1 and that one of yarn 4 both sides can produce directional light has a photosensitive surface 211 and form, wherein, Optical Transmit Unit 1 includes the lens 12 that an optical transmitting set 11 and with wide cut firing angle is arranged on these optical transmitting set 11 the place aheads, for guaranteeing to form a directional light zone 3 through the light source of optical transmitting set 11 emissions, described lens 12 are convex lens, optical signal promptly forms directional light zone 3 behind these convex lens, yarn 4 freely-movable in this directional light zone 3, the photosensitive surface of light receiving unit 1 directly receives the optical signal in directional light zone 3, and the intensity variation in the directional light zone 3 that light receiving unit 1 receives light receiving unit 2 by a testing circuit is converted to the output signal of indication yarn motion state.
The yarn movement detection method of present embodiment is as follows:
A directional light zone 3 that is directly produced by Optical Transmit Unit 1 is set, and light receiving unit 2 detects the motion state of yarn 4 in this directional light zone 3;
The photosensitive surface 211 of relative light receiving unit 2, the intensity variation in yarn 4 caused directional light zone 3 in Fixed Time Interval that affirmation is moved based on the intensity variation in this directional light zone 3, produces a variable signal of telecommunication;
In Fixed Time Interval, the signal of telecommunication is with respect to the variation of reference signal, and generation one indicates the output signal of yarn motion state;
The functional unit of spinning machine receives described output signal and carries out the operational order of shutdown or operate as normal.
In order to obtain quite good detecting effectiveness, prevent that surround lighting from changing the interference that intensity variation is detected, present embodiment has adopted light emitting diode as optical transmitting set at transmitting terminal, and has adopted twin PIN type photodiode as light receiving unit at receiving terminal.
Fig. 2 is the testing circuit schematic diagram of present embodiment, this testing circuit is a core with a single-chip microcomputer U2, also include amplifier U1, first capacitor C 1 and second capacitor C 2, wherein, anode as the light emitting diode IDR of optical transmitting set links to each other with dc power anode VCC, the negative electrode of this light emitting diode IDR links to each other through the P1.7 pin of the 4th resistance R 4 and single-chip microcomputer U2, the negative electrode of the first photodiode D1 of PIN type photodiode D links to each other with direct positive source VCC, the anode one tunnel of this first photodiode D1 is through first resistance R, 1 ground connection GND, the negative input b of another road first capacitor C 1 and amplifier U1 links to each other, the negative electrode of the second photodiode D2 of PIN type photodiode D links to each other with dc power anode VCC, the anode one tunnel of this second photodiode D2 is through second resistance R, 2 ground connection, the electrode input end a of another road second capacitor C 2 and amplifier U1 links to each other, the output c of amplifier U1 links to each other through the P3.2 pin of the 5th resistance R 5 and single-chip microcomputer U2, the negative input b of amplifier U1 links to each other through the output c of the 3rd resistance R 3 with this amplifier U1, and the control signal end that the P1.2 pin of single-chip microcomputer U2 produces an output signal out and spinning machine links to each other.
The operation principle of this testing circuit is:
The light source scioptics 12 that send through light emitting diode IDR form directional light zone 3, and shine on the photosensitive surface 211 of PIN type photodiode D, and yarn 4 is vertical with directional light zone 3.
When yarn 4 is in static or during broken yarn (no yarn) state, PIN type photodiode D directly receives the optical signal of light emitting diode IDR, and the luminous intensity on the PIN type photodiode D is constant, so, set when not having pressure reduction between the negative input b of amplifier U1 and the electrode input end a, the unconverted signal of telecommunication of output c of this amplifier U1, so, when the P3.2 of the single-chip microcomputer U2 pin input no change signal of telecommunication, this single-chip microcomputer U2 just exports a low level or high level as the controller that outputs signal to spinning machine at the P1.2 pin, informs that current yarn is static or broken yarn (no yarn) state;
When yarn 4 is in the proper motion state, because yam surface is not smooth, be distributed with the burr of inhomogeneous layout, and, yarn has faint swing in motion process, so, the light intensity signal that the photosensitive surface of the PIN type photodiode D of optical receiving end can change owing to be subjected to blocking of yarn, because the first photodiode D1 links to each other with negative input b with the electrode input end a of amplifier U1 respectively with the second photodiode D2, make and to produce certain pressure reduction between the electrode input end a of amplifier U1 and the negative input b, so the light intensity signal that changes is sent into single-chip microcomputer U2 after amplifying by amplifier U1, set when between the electrode input end a of amplifier U1 and the negative input b pressure reduction being arranged, the signal of telecommunication that the output c of this amplifier U1 can change, so, when the P3.2 of single-chip microcomputer U2 pin receives the signal of telecommunication of variation, the P1.2 pin of this single-chip microcomputer U2 is just exported a low level or high level as the controller that outputs signal to spinning machine, informs that current yarn is the proper motion state.
Considering that amplifier U1 has only when electrode input end a and negative input b have pressure reduction just can produce triggering signal at output c, change the interference of the intensity variation that causes a little less than the environmental light intensity, therefore, adopted twin PIN type photodiode D in the present embodiment, this twin PIN type photodiode D includes the first photodiode D1 and the second photodiode D2, can link to each other with negative input b with the electrode input end a of amplifier U1 respectively, the intensity variation signal that amplifier U1 can only produce yarn movement amplifies, the intensity variation that can effectively avoid weak variation of environmental light intensity and cause is disturbed, improve accuracy of detection, guaranteed the reliability that detects.
Claims (6)
1, a kind of detection method of yarn motion state, described yarn (4) have motion between the light receiving unit (2) of photosensitive surface (211) at an Optical Transmit Unit (1) and, it is characterized in that:
A directional light zone (3) that is directly produced by described Optical Transmit Unit (1) is set, and described light receiving unit (2) detects the motion state of described yarn (4) in this directional light zone (3);
Described yarn (4) is sent into spinning machine by described directional light zone (3), and this yarn (4) by described directional light zone (3) with can move freely;
The photosensitive surface (211) of described relatively light receiving unit (2), confirm the intensity variation in mobile yarn (4) caused described directional light zone (3) in Fixed Time Interval, based on the intensity variation in this directional light zone (3), produce a variable signal of telecommunication;
In Fixed Time Interval, the described signal of telecommunication is with respect to the variation of reference signal, and generation one indicates the output signal of described yarn (4) motion state;
The functional unit of described spinning machine receives described output signal and carries out the operational order of shutdown or operate as normal.
2, the detection method of yarn motion state according to claim 1, described reference signal is corresponding to the signal of current state with respect to the yarn conditions before the described Fixed Time Interval.
3, a kind of device of realizing yarn motion state detection method as claimed in claim 1 or 2, it is characterized in that: this device includes the light receiving unit (2) that an Optical Transmit Unit (1) and that can produce directional light has photosensitive surface (211), wherein, described Optical Transmit Unit (1) includes the lens (12) that an optical transmitting set (11) and with wide cut firing angle is arranged on this optical transmitting set (11) the place ahead, the optical signal of described optical transmitting set (11) emission promptly forms described directional light zone (3) through described lens (12), described yarn (4) freely-movable in this directional light zone (3), the photosensitive surface (211) of described light receiving unit (2) directly receives the optical signal in described directional light zone (3), and the intensity variation in the directional light zone (3) that described light receiving unit (2) receives described light receiving unit (2) by a testing circuit is converted to the output signal of the described yarn motion state of indication.
4, device according to claim 3 is characterized in that: described optical transmitting set (11) is a Light-Emitting Diode (IDR), and described light receiving unit (2) is a twin PIN type photodiode (D).
5, device according to claim 4, it is characterized in that: described testing circuit is a core with single-chip microcomputer (U2), also include amplifier (U1), first electric capacity (C1) and second electric capacity (C2), wherein, the anode of described light emitting diode (IDR) links to each other with dc power anode (VCC), the negative electrode of this light emitting diode (IDR) links to each other through the P1.7 pin of the 4th resistance (R4) with described single-chip microcomputer (U2), the negative electrode of first photodiode (D1) of described PIN type photodiode (D) links to each other with described direct positive source (VCC), the anode one tunnel of this first photodiode (D1) is through first resistance (R1) ground connection, another road links to each other through the negative input (b) of described first electric capacity (C1) and described amplifier (U1), the negative electrode of second photodiode (D2) of described PIN type photodiode (D) links to each other with described dc power anode (VCC), the anode one tunnel of this second photodiode (D2) is through second resistance (R2) ground connection, the electrode input end (a) of another road second electric capacity (C2) and described amplifier (U1) links to each other, the output (c) of described amplifier (U1) links to each other through the P3.2 pin of the 5th resistance (R5) with described single-chip microcomputer (U2), the negative input (b) of described amplifier (U1) links to each other through the output (c) of the 3rd resistance (R3) and this amplifier (U1), and the control signal end that the P1.2 pin of described single-chip microcomputer (U2) produces described output signal (out) and spinning machine links to each other.
6, device according to claim 3 is characterized in that: described light receiving unit is a silicon photocell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100988405A CN101550622A (en) | 2009-05-15 | 2009-05-15 | A yarn motion state detection method and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100988405A CN101550622A (en) | 2009-05-15 | 2009-05-15 | A yarn motion state detection method and device thereof |
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| CN101550622A true CN101550622A (en) | 2009-10-07 |
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| CNA2009100988405A Pending CN101550622A (en) | 2009-05-15 | 2009-05-15 | A yarn motion state detection method and device thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031605A (en) * | 2010-11-12 | 2011-04-27 | 刘瑜 | Detection device for spinning machine yarn state and detection method thereof |
| CN102433629A (en) * | 2011-12-21 | 2012-05-02 | 台达电子企业管理（上海）有限公司 | Monitor system and method for spinning machine |
| CN102677237A (en) * | 2012-06-11 | 2012-09-19 | 杭州电子科技大学 | Adaptive photoelectric electronic yarn cleaner |
| CN104713587A (en) * | 2013-12-17 | 2015-06-17 | 里特捷克有限公司 | Method of monitoring quality of yarn or another linear textile formation in yarn quality optical scanner and line optical scanner for making the same |
-
2009
- 2009-05-15 CN CNA2009100988405A patent/CN101550622A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031605A (en) * | 2010-11-12 | 2011-04-27 | 刘瑜 | Detection device for spinning machine yarn state and detection method thereof |
| CN102031605B (en) * | 2010-11-12 | 2012-03-14 | 刘瑜 | Detection method for spinning machine yarn state |
| CN102433629A (en) * | 2011-12-21 | 2012-05-02 | 台达电子企业管理（上海）有限公司 | Monitor system and method for spinning machine |
| CN102677237A (en) * | 2012-06-11 | 2012-09-19 | 杭州电子科技大学 | Adaptive photoelectric electronic yarn cleaner |
| CN102677237B (en) * | 2012-06-11 | 2014-07-09 | 杭州电子科技大学 | Adaptive photoelectric electronic yarn cleaner |
| CN104713587A (en) * | 2013-12-17 | 2015-06-17 | 里特捷克有限公司 | Method of monitoring quality of yarn or another linear textile formation in yarn quality optical scanner and line optical scanner for making the same |
| CN104713587B (en) * | 2013-12-17 | 2019-12-10 | 里特捷克有限公司 | Method for monitoring the quality of a yarn and linear optical detector for carrying out the method |
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Open date: 20091007 |