JPH0327472B2 - - Google Patents
Info
- Publication number
- JPH0327472B2 JPH0327472B2 JP23595483A JP23595483A JPH0327472B2 JP H0327472 B2 JPH0327472 B2 JP H0327472B2 JP 23595483 A JP23595483 A JP 23595483A JP 23595483 A JP23595483 A JP 23595483A JP H0327472 B2 JPH0327472 B2 JP H0327472B2
- Authority
- JP
- Japan
- Prior art keywords
- yarn
- signal
- voltage
- yarn defect
- circuit
- 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.)
- Expired
Links
- 230000007547 defect Effects 0.000 claims description 40
- 238000012806 monitoring device Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 6
- 206010049040 Weight fluctuation Diseases 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
- B65H63/062—Electronic slub detector
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Quality & Reliability (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
【発明の詳細な説明】
本発明は、測定回路からの糸走行信号中から予
め定めた振幅と波長をもつ信号を分離し、糸欠陥
信号として検出する糸欠陥検出回路に相互コンダ
クタンス可変型電圧電流変換器を使用した糸欠陥
モニター装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a yarn defect detection circuit that separates a signal with a predetermined amplitude and wavelength from a yarn running signal from a measurement circuit and detects it as a yarn defect signal. The present invention relates to a yarn defect monitoring device using a transducer.
一般に、走行中の糸の欠陥を検出してこれを除
去する装置として所謂糸欠陥モニター装置がある
が、これは測定ヘツド中を走行している糸の重量
変動を電気信号の変動に変え、この信号から予め
定めた振幅と波長をもつ信号を分離し、これを糸
欠陥信号として検出してカツターを駆動し、糸欠
陥部分を除去するもので、糸欠陥信号を検出する
回路がこの装置の中で最も重要な要素である。 In general, there is a so-called yarn defect monitoring device that detects and removes defects in running yarn, but this device converts the weight fluctuations of the yarn running in the measuring head into electrical signal fluctuations. The device separates a signal with a predetermined amplitude and wavelength from the signal, detects this as a yarn defect signal, drives the cutter, and removes the yarn defect portion.The circuit for detecting the yarn defect signal is inside this device. is the most important element.
而して、糸欠陥信号の波長を選択するというこ
とは予め定めた周波数に応答することと同義であ
るから、この検出回路は設定値以上の周波数の信
号を減衰させる電気回路で構成すればよいことと
なる。 Since selecting the wavelength of the yarn defect signal is synonymous with responding to a predetermined frequency, this detection circuit may be constructed of an electric circuit that attenuates signals with frequencies higher than a set value. It happens.
この目的を達成する最も簡単な電気回路として
抵抗とコンデンサーを直列接続した所謂ローパス
フイルタ（RC回路）があり、この抵抗値及び／
乃至容量を変化させれば、周波数応答を制御する
ことができるのであるが、多数の糸欠陥モニター
装置が設置されている紡織工場等にあつては全て
の糸欠陥モニター装置の周波数応答を個々に、ま
たは同時にそして同じ量だけ糸の重量変動に従つ
て変化したいという要求に答えるためには個々の
抵抗要素に可変抵抗器を使用してそれぞれ設定値
に調節するという原始的方法を採用する訳にはい
かなかつた。そのため、従来から、抵抗要素に温
度変化によつて抵抗値が変化するサーミスタを使
用し、このサーミスタの加熱温度を電気的に制御
することによつて中央制御できるようにした糸欠
陥モニター装置が使用されているが、このサーミ
スタは入力電圧によつても抵抗値が変化すると共
に、使用される環境の温度変化の影響を受けやす
く、更に、その抵抗値の使用される可変範囲がき
わめて狭い等の欠点を有していた。 The simplest electric circuit to achieve this purpose is a so-called low-pass filter (RC circuit), which has a resistor and a capacitor connected in series.
The frequency response can be controlled by changing the capacitance, but in textile factories where a large number of yarn defect monitoring devices are installed, it is possible to control the frequency response of all yarn defect monitoring devices individually. , or at the same time and by the same amount depending on the weight fluctuation of the yarn, a primitive method of using variable resistors for each resistance element and adjusting each to a set value is adopted. I couldn't go. For this reason, yarn defect monitoring devices have traditionally been used that use a thermistor whose resistance value changes with temperature changes as a resistance element, and centrally control the heating temperature of this thermistor by electrically controlling it. However, the resistance value of this thermistor changes depending on the input voltage, it is easily affected by temperature changes in the environment in which it is used, and furthermore, the variable range in which the resistance value can be used is extremely narrow. It had drawbacks.
そこで、ON−OFFの間隔が調節できる電子ス
イツチを用いて測定回路からの信号を間引いて見
かけの抵抗値を変化させるようにしたものが発明
されたが、これは入力電圧及び環境の温度変化に
は影響を及ぼさないが、糸の走行速度との関係で
電子スイツチのON−OFFの間隔を長くする訳に
いかず、可変範囲が狭く、適用範囲即ちモニター
すべき欠陥の種類が限定される欠点を有してい
た。 Therefore, a device was invented that uses an electronic switch that can adjust the ON-OFF interval to thin out the signal from the measurement circuit and change the apparent resistance value. Although it has no effect, it is not possible to lengthen the ON-OFF interval of the electronic switch in relation to the yarn running speed, and the variable range is narrow, which limits the scope of application, that is, the types of defects to be monitored. It had
然るに、本発明は、真空管定数の一つである相
互コンダクタンスgmが抵抗値の逆数のデイメン
ジヨンを有することに着目し、この相互コンダク
タンスを可変できる電子回路を糸欠陥検出回路に
使用すれば、入力電圧、環境の温度変化に影響を
受けることなく、かつ周波数応答の可変範囲の広
い糸欠陥モニター装置が得られるのではないかと
の考察に基づいてなされたもので、以下図示する
実施例について本発明の具体的構成を説明する。 However, the present invention focuses on the fact that the mutual conductance gm, which is one of the vacuum tube constants, has a dimension that is the reciprocal of the resistance value, and if an electronic circuit that can vary this mutual conductance is used in the yarn defect detection circuit, the input voltage can be reduced. This was done based on the consideration that it would be possible to obtain a yarn defect monitoring device that is not affected by environmental temperature changes and has a wide frequency response variable range. The specific configuration will be explained.
即ち、測定ヘツド２1中を通過する糸の重量変
動に応じて電圧が変化する信号を発生する測定回
路２、この信号の電圧変化から糸中のスラブ等の
糸欠陥を検出して信号を発する糸欠陥検出回路３
及び同回路からの信号によつて糸欠陥を切断する
カツター駆動回路４とから成る糸欠陥モニター装
置１に於いて、前記糸欠陥検出回路３を、測定回
路２からの電圧信号を電流信号に変換すると共
に、中央制御装置Ａからの電気信号により相互コ
ンダクタンスgmが変化せしめられる相互コンダ
クタンス可変型電圧電流変換器３ａと、同変換器
３ａからの変換電流により充電されるコンデンサ
ー３ｂと、この端子電圧を変換器３ａに負帰還さ
せる緩衝増巾器３ｃとから構成したことを特徴と
するものである。 That is, the measuring circuit 2 generates a signal whose voltage changes according to the weight fluctuation of the yarn passing through the measuring head 21 , and detects a yarn defect such as a slab in the yarn from the voltage change of this signal and generates a signal. Yarn defect detection circuit 3
and a cutter drive circuit 4 which cuts yarn defects according to a signal from the same circuit. At the same time, a mutual conductance variable voltage current converter 3a whose mutual conductance gm is changed by an electric signal from the central controller A, a capacitor 3b charged by the converted current from the converter 3a, and a terminal voltage of It is characterized by comprising a buffer amplifier 3c that provides negative feedback to the converter 3a.
次に、本発明の上記構成に従い、図示する実施
例について糸欠陥検出回路３の周波数応答につい
て説明する。 Next, the frequency response of the yarn defect detection circuit 3 will be explained with respect to the illustrated embodiment according to the above-described configuration of the present invention.
即ち、測定回路２から糸の重量変動に応じた電
圧Viが入力されると、電圧電流変換器３ａの出
力端子からは後述の緩衝増巾器３ｃから帰還され
る電圧との差即ち差動入力電圧Vdと相互コンダ
クタンスgmの積で示される電流が出力され、
この電流がコンデンサー３ｂを充電し、その端
子電圧を緩衝増幅器３ｃを通じて出力電圧Voと
して出力させるのであるが、この回路３の周波数
応答Ｇはこの出力電圧V0と入力電圧Viの比即ち
Ｖｏ／Ｖｉによつて表わされ、入力電圧Viの角周波
数をＷ、コンデンサー３ｂの容量をＣ、変換器３
ａの相互コンダクタンスをgmとすれば、
なる式で定義されることになる。 That is, when a voltage Vi corresponding to the weight fluctuation of the yarn is inputted from the measuring circuit 2, the output terminal of the voltage-current converter 3a outputs a difference between the voltage Vi that is fed back from the buffer amplifier 3c, which will be described later, or a differential input. A current represented by the product of voltage Vd and transconductance gm is output,
This current charges the capacitor 3b and outputs the terminal voltage as the output voltage Vo through the buffer amplifier 3c.The frequency response G of this circuit 3 is the ratio of this output voltage V0 to the input voltage Vi, that is, Vo/Vi. where the angular frequency of the input voltage Vi is W, the capacitance of the capacitor 3b is C, and the converter 3
If the mutual conductance of a is gm, then It will be defined by the following formula.
つまり、相互コンダクタンスgmを変化させる
ことによつて周波数応答Ｇを制御することができ
るもので、中央制御装置Ａから制御ラインＢを通
じて変換器３ａに制御電圧Vcを印加し、その電
圧を変化させることによつて相互コンダクタンス
gm即ち糸欠陥検出回路３の周波数応答Ｇを任意
に変化させることができるものである。 In other words, the frequency response G can be controlled by changing the mutual conductance gm, and the control voltage Vc is applied from the central controller A to the converter 3a through the control line B, and the voltage is changed. transconductance by
gm, that is, the frequency response G of the yarn defect detection circuit 3 can be changed arbitrarily.
以上述べた如く、本発明に係る糸欠陥モニター
装置によれば、糸欠陥検出回路に、測定回路から
の電圧信号を電流信号に変換し、かつ中央制御装
置からの電気信号により相互コンダクタンスが変
化せしめられる相互コンダクタンス可変型電圧電
流変換器を採用したものであるから、従来のサー
ミスタを使用した糸欠陥検出回路のように入力電
圧或いは環境の温度変化によつて糸欠陥の検出精
度が変化し、検出する必要のない糸欠陥を検出し
たり、検出すべき糸欠陥を見逃がしたりする不都
合は全くなくなり、きわめて誤動作の少ない糸欠
陥モニター装置を提供できると共に、抵抗値の変
化による周波数応答の制御ではなく相互コンダク
タンスの変化による周波数応答の制御であるか
ら、非常に広い範囲に亘つて周波数応答が可変で
き、糸欠陥全般に亘つて使用できる糸欠陥モニタ
ー装置を提供できるものである。 As described above, according to the yarn defect monitoring device according to the present invention, the yarn defect detection circuit converts the voltage signal from the measurement circuit into a current signal, and changes the mutual conductance by the electric signal from the central control device. Because it uses a variable transconductance voltage-current converter, the detection accuracy of yarn defects changes depending on input voltage or environmental temperature changes, unlike conventional yarn defect detection circuits that use a thermistor. This eliminates the inconvenience of detecting yarn defects that do not need to be detected or overlooking yarn defects that should be detected, and it is possible to provide a yarn defect monitoring device with extremely few malfunctions. Since the frequency response is controlled by changing the mutual conductance, the frequency response can be varied over a very wide range, making it possible to provide a yarn defect monitoring device that can be used for all types of yarn defects.
尚、本発明に使用される相互コンダクタンス可
変型電圧電流変換器は他の電子回路分野では公知
であるので、その具体的構成の記述は省略する
が、制御電圧で制御される電流源を有する特性が
良く揃つた二個のトランジスタから成る差動増幅
器が好ましい。 The variable mutual conductance voltage-current converter used in the present invention is well known in other electronic circuit fields, so a description of its specific configuration will be omitted, but it has a characteristic of having a current source controlled by a control voltage. A differential amplifier consisting of two transistors with well matched values is preferred.
また、糸欠陥モニター装置にカツター駆動回路
を含めたものを通常は電子的ヤーンクリヤラと称
するが、実施例ではカツター駆動回路を含めたも
のも糸欠陥モニター装置として定義した。 Further, a yarn defect monitoring device including a cutter drive circuit is usually called an electronic yarn clearer, but in the examples, a device including a cutter drive circuit is also defined as a yarn defect monitoring device.
図面は本発明の実施態様を例示するもので、第
１図は本発明に係る複数の糸欠陥モニター装置を
制御する状態を表わすブロツクダイヤグラム、第
２図は同装置のブロツクダイヤグラム、第３図は
同装置を構成する糸欠陥検出回路のブロツクダイ
オグラムである。
１…糸欠陥モニター装置、２…測定回路、３…
糸欠陥検出回路、３ａ…相互コンダクタンス可変
型電圧電流変換器、３ｂ…コンデンサー、３ｃ…
緩衝増幅器、４…カツター駆動回路。
The drawings illustrate embodiments of the present invention, and FIG. 1 is a block diagram showing the state of controlling a plurality of yarn defect monitoring devices according to the present invention, FIG. 2 is a block diagram of the same device, and FIG. This is a block diagram of the yarn defect detection circuit that constitutes the same device. 1... Yarn defect monitoring device, 2... Measuring circuit, 3...
Yarn defect detection circuit, 3a... Variable mutual conductance voltage-current converter, 3b... Capacitor, 3c...
Buffer amplifier, 4... cutter drive circuit.
Claims (1)
応じて電圧が変化する信号を発生する測定回路
２、この信号の電圧変化から糸中のスラブ等の糸
欠陥を検出して信号を発する糸欠陥検出回路３と
から成る糸欠陥モニター装置１に於いて、前記糸
欠陥検出回路３を、測定回路２からの電圧信号を
電流信号に変換すると共に、中央制御装置Ａから
の電気信号により相互コンダクタンスgmが変化
せしめられる相互コンダクタンス可変型電圧電流
変換器３ａと、同変換器３ａからの変換電流によ
り充電されるコンデンサー３ｂと、この端子電圧
を変換器３ａに負帰還させる緩衝増巾器３ｃとか
ら構成したことを特徴とする糸欠陥モニター装
置。1 Measuring head 2 Measuring circuit 2 that generates a signal whose voltage changes according to weight fluctuations of the yarn passing through 1 , Yarn that detects yarn defects such as slabs in the yarn from voltage changes in this signal and issues a signal In a yarn defect monitoring device 1 comprising a defect detection circuit 3, the yarn defect detection circuit 3 converts a voltage signal from a measuring circuit 2 into a current signal, and also converts a mutual conductance signal by an electric signal from a central controller A. A variable transconductance voltage-current converter 3a in which gm is varied, a capacitor 3b charged by the converted current from the converter 3a, and a buffer amplifier 3c that negatively feeds back this terminal voltage to the converter 3a. A yarn defect monitoring device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23595483A JPS60128171A (en) | 1983-12-13 | 1983-12-13 | Yarn defect monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23595483A JPS60128171A (en) | 1983-12-13 | 1983-12-13 | Yarn defect monitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60128171A JPS60128171A (en) | 1985-07-09 |
| JPH0327472B2 true JPH0327472B2 (en) | 1991-04-16 |
Family
ID=16993668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23595483A Granted JPS60128171A (en) | 1983-12-13 | 1983-12-13 | Yarn defect monitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60128171A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046875B (en) * | 2021-01-29 | 2022-09-06 | 安徽省金士棉机有限责任公司 | Ring spinning flaw product removing device |
-
1983
- 1983-12-13 JP JP23595483A patent/JPS60128171A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60128171A (en) | 1985-07-09 |
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