SU962376A1

SU962376A1 - Fabric seam sensor

Info

Publication number: SU962376A1
Application number: SU803212169A
Authority: SU
Inventors: Артур Константинович Расторгуев; Давид Викторович Ветчинин; Сергей Юрьевич Павлычев; Константин Аркадьевич Харахнин
Original assignee: Ивановский Ордена Трудового Красного Знамени Текстильный Институт Им.М.В.Фрунзе
Priority date: 1980-12-05
Filing date: 1980-12-05
Publication date: 1982-09-30

Description

Изобретение относитс к текстильной npoNKEuieHHocTH, а именно к дат чикам шва ткани, и может быть использовано дл контрол направлени и скорости ткани.The invention relates to a textile npoNKEuieHHOCTH, namely to sensors of a seam of a fabric, and can be used to control the direction and speed of a fabric.

Известен датчик шва ткани, содержащий магнитную систему, включающую посто нный магнит, св зывающий два полюсных наконечника, снабженных катушками , и два кор - лапки 1. A fabric seam sensor is known, which contains a magnetic system, including a permanent magnet, connecting two pole tips fitted with coils and two cores 1.

Недостатком известного датчика вл етс то, что он не может быть использован дл контрол вида шва ткани в широком диапазоне скоростей, направлени движени и скорости .ткани.A disadvantage of the known sensor is that it cannot be used to control the look of the seam of the fabric in a wide range of speeds, the direction of movement and the speed of the fabric.

Цель изобретени - расширение функциональных возможностей датчика.The purpose of the invention is to expand the functionality of the sensor.

Поставленна цель достигаетс тем, что в датчике шва ткани, содержащем магнитную систему, включающую посто нный магнит, св зывающий два полюсных наконечника, снабженных катушками , и два кор -лапки, магнитна система имеет св занные один с другим дополнительный посто нный магнит и третий полюсный наконечник, имеющий катушку, посто нные магниты включены встречно, а кори-лапки имеют длину, большую величины зазора между соседними полюсными наконечниками и расположены последовательно один за другим на рассто нии,большем длины оверлочного, но меньшем длины партионного шва.The goal is achieved by the fact that in a seam sensor of a fabric containing a magnetic system including a permanent magnet connecting two pole tips provided with coils and two cores, the magnetic system has an additional permanent magnet connected to one another a tip that has a coil, permanent magnets are turned on, and the measles have a length that is larger than the gap between adjacent pole tips and are arranged one after the other at a distance that is greater than the overlap length Nogo, but a smaller length partionnogo seam.

На фиг.1 показана конструкци предлагаемого датчика5 на фиг.2 и 3 диаграмма работы датчика при выполнении различных функций.Fig. 1 shows the construction of the proposed sensor 5 in Figs. 2 and 3, a diagram of the operation of the sensor when performing various functions.

10ten

Датчик включает в себ полюсные наконечники 1, соединенные между собой посредством встречно включенных посто нных махнитов 2, катушек 3-5 на полюсшлх наконечниках, лапки- ко15 р 6 и 7, чувствительные элементы, которые перекрывают зазоры 8 магнитной систег ы и расположены последовательно друг за другом на рассто нии определ емом:The sensor includes pole tips 1, interconnected by means of counter-connected permanent machinites 2, coils 3-5 at the pole tips, legs 15 and 6 and 7, sensitive elements that cover the gaps 8 of the magnetic system and are located in series other at a distance determined by:

2020

VCK пагт.,VCK pagt.,

где 1|59ск.- длина оверлочного шва, fexipt..JV™на партионного шва.where 1 | 59ск.- length overlock joint, fexipt..JV ™ on the party seam.

Датчик работает следующим обра25 зом.The sensor works as follows.

Claims

Consider the operation of the sensor when distinguishing types of seams. Let a part seam pass through the sensor zone. It causes a pulse signal to appear at the output of the coil 4 (Fig. 2a), moreover, at the time t, for example, a positive pulse caused by the rise of the sensing element 6 from the leading front of the seam. At time t, a positive impulse will also appear, caused by the rise of the sensing element 7. At time t, the sensing element 6 will be lowered and, finally, if the element is 14 g-lowering, this will cause the appearance of negative impulses. With the passage of the overlock, of the seam, the sequence noHBne will have no pulses, as shown in Fig. 2,6. Thus, regardless of the speed of movement of the tissue, the sequence of pulses will always be the same. Consider the operation of the sensor when determining the direction of movement of the seam (fabric). In this case, when the first pulse appears in coils 3 or 5, it is possible to judge the direction of movement of the seam. If we use the noise signal from the sensor resulting from the interaction of the surface of the fabric with sensing elements 6 and 7, moving at a distance L from each other, successively one after the other in the direction of movement of the fabric, then noise signals from coils 3 and 5 can be used for correlation velocity measurement (Fig. 3). Noise signals will be delayed relative to each other for a time, where V is a speed equal to 17 — at the movement of the fabric tissue movement by the correlation method. The use of the proposed sensor determines its wide functionality. Claims A fabric seam sensor comprising a magnetic system including a permanent magnet connecting two pole pieces provided with coils and two cores, characterized in that, in order to extend the functionality, the magnetic system has one with the other. an additional permanent magnet and a third pole tip having a coil, the permanent magnets are included counter, and the measles have a length greater than the size of the gap between adjacent single tips and are arranged in series with yn for a distance greater than overlock length but smaller length partionnogo seam. Sources of information taken into account during the examination 1. Kokarev V.N. et al. Tissue shearing and automatic seam skipping on modern shearing machines. M., TsNIITEILEgpishchemash, 1972, p. eight, . fig.2.