SU1442580A2 - Weft monitor - Google Patents

Abstract

The invention relates to textile industry. The purpose of the invention is to improve the accuracy of control. The device is equipped with blocks 12 and 14 of storing a sequence of underflights wetsheets connected in parallel with storage blocks 11 and 13. The information stored by blocks 11, 12, 13 and 14 is reset by the output of counter 19 of the fabric to be worked on, 1 r, p. f-ly, 4 ill.

Description

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The invention of OTHQCHTCH to the textile industry and is an improvement of the device according to the author. No. 8.96094.

The purpose of the invention is to improve the accuracy of control

Figure 1 shows the block diagram of the device; Fig. 2 is a block diagram of a block for storing a sequence of a gap of weeds} shti; Fig. 3 shows a variant for connecting a memory storing unit for an underflow of a weft thread; Fig. 4 shows the layout of the sensors for the presence of the weft thread.

The device contains a contact 1, which is intended to connect the power source to the device after turning the machine into operation, sensors 2 and 3 of the presence of a weft consisting of sources 4 and 5 of light and photo detectors 6 and 7, between which the cloth 8 passes, connected to the inputs of amplifiers 9 and 10, the outputs of which are connected respectively to the inputs 11 of the mailing unit 11 and the unit 12 for storing the sequence of the deficit of the weft thread and the recording unit 3 and the unit 14. for storing the sequence of underflows

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At the same time, blocks 11 and 13 regulate for a certain number of underfalls of duck, and blocks 12 and 14 regulate for a specific sequence of shortfalls.

Output1 is cascades 15 and. 16 are connected solt- ems to the moves of block 11, 12, and 13,14 and to the loom stopping unit (not shown). The closing contact 17 is connected via - laHiiy 18 reset to the reset inputs of blocks 11-14, and all the reset inputs are connected to the corresponding outputs of the counter 19 of the length of the fabric being formed, which is implemented, for example, on a storage unit similar to blocks 12 and 14 and pulses of length units fabricable.

Each of the blocks has an independent setting for the number and sequence of under-flights for a certain length of the produced tissue.

The device works as follows.

When the machine starts up, contact 1 is simultaneously turned on and

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the device is energized. The fabric 8, illuminated by the sources 4 and 5 of the light, moves under the photodetectors 6 and 7. The light rays from sources 4 and 5 fall on the photodetectors 6 and 7, which convert the light flux into electrical current. The photodetectors are adjusted so that the light signal is converted into electrical at a certain intensity of the light flux.

When a duck appears undershot, for example, up to 5 cm in length, the light beam from source 4 of light passes through the tissue rarefied in this place and hits the photodetector 6 “As a result, an electrical impulse occurs, which through amplifier 9 hits the counting tracks from the memory sticks - of the block 11, which was fired for a certain number of underflights of the duck, and block 12, oTparyjnipoBaHHoro for a certain sequence of minimum underflights of the duck.

Upon reaching a predetermined number of underflights, when the infrared reaches a certain sequence C1; the signal from blocks 11 I / U7I t2 is fed through output stage 15 to the machine stop unit.

For example, block 12 is configured to perform three progresses with a minimum amount of TCii. (less than 5 cm), i.e. its third V..1 single level signal inlet is connected to cascade 15 (FIG. 2), and unit 14 is configured for two passes with a maximum undershoot (more than 5 cm) for a certain length of the produced tissue . That, his second output of a single level is connected to a cascade of 16

With a minimum undershoot, a weft in three proc jaws of the order at the third output of block 12, a single level signal appears through the cascade 15 to the machine stop block

When a duck undershoot appears longer than 5 cm, both photo receivers 6 and 7 work, electrical impulses through amplifiers 9 and 10 fall on blocks 11-14. A single level signal appears at the output of block 14, after which the machine stop unit is activated through cascade 16.

When, when the permissible sequence of maximum maximal I / NIIs of minimum deficiencies is reached, the accumulated information is self-resetting by the g 19, 12 and / or 13.1 A blocks until the specified number of pulses corresponding to the specified length The produced tissue, from its corresponding outputs, receives signals to the corresponding reset inputs of blocks 11 and / or 12-1АJ regardless of whether or not the number of undershoots has exceeded its maximum limit for a given length of fabric.

If block 12 is configured for a more complex combination of under-flow and normal passes, then 20 counters should be used with additional counters. For example, if the device is configured for four combinations of flights and, for example, minimum undershoots per eight pulses from a meter of length 25 of block 19, then it should be parallel. connect the second, fourth, sixth, eighth outputs of the signals of a unit level of block 12 and connect them to the input of the next counter (Fig 3) 30

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the same block. The fourth output of the unit-level signal is the output of block 12 connected to the self-reset circuit and stage 15. The reset of the last counter will be connected to the eighth output of the unit level signals of the first counter of block 12 o flights and undershoots.

Claims (2)

Invention Formula 1, The device for controlling the weft thread according to the author No. 896094, characterized in that, in order to ensure the accuracy of control, it is equipped with memory blocks for the sequence of underflows of the weft thread, each of which is connected in parallel to correspond to the storage unit; 2. A device according to claim 1, characterized in that it is provided with a counter of the length of the fabric produced, the output of which is connected with the information reset inputs of the storage units and the memory storing units of the under-flow of the weft thread. Counter gw / iuii Iff I- K {the baking of the loom Cdffocfpx 12  1L iiP CuHtcfpec --It Fi.j.2 FIG. / S / fafig ocma / oSo fTfHQl f Offff cfTfOHfi-a ig.