SU715418A1 - Textile thread breakage sensor - Google Patents

Description

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The invention relates to cocktail-i devices and can be used in the textile industry in the processes of forming and processing yarns.

A textile breakage sensor is known, which contains an illuminator and a photodetector, between which a thread passes, the interruption of which leads to a change in the illumination of the photodetector and the formation of the electrical signal ij.

The disadvantages of this sensor are the need for a photoelectric converter system, a sufficiently accurate alignment of the optical system, and settings for a specific filament number.

A yarn break sensor is also known, which contains an electrostatic induction transducer that monitors the variable component of the electric field created by the triboelectric charge of the moving yarn 2 o.

The disadvantage of this sensor is that the sensitivity is reduced when it is minimized by the Scientific Research Institute of the speed of movement of the thread, and when the thread is stopped, a false signal about its breakage is produced.

The purpose of the invention is the elimination of false alarms of the sensor.

For this, the proposed sensor is an immobilizer for blowing the filament with turbulent streams, while the transducer is installed in the zone of free-flowing gas flow.

The drawing shows a structural diagram of the proposed sensor.

In the drawing, the following notation is accepted: 1 - controlled filament, 2 - device for blowing filament with turbulent gas flows, 3 - signaling unit /

A pneumatic ejector with an electrostatic induction measuring electrode 4 and an amplifier 5 form an electrostatic induction converter G.

715418

The sensor works in the same way, Kai when moving, as well as with non-stemming turb; The tent airflows created by the device for the treatment of the thread and the first turbulent gas yoke cause transverse oscillations and a variable stretch of the thread in the installation zone of the ejector. The transverse vibration and the variable draw create a variable component of the electric field of the triboelectric charge of the filament, which it acquires, i.e., a friction score on the heading headset in the previous technological process.

The variable component of the electrical IO31I is converted by electrode 4,

It is detected by the amplifier 5 and is connected to the V5 node of the signaling unit 3, which excludes its operation when the speed and movement of the thread decreases, as well as when it stops. When the thread breaks 1 signals with

electrode 4, amplifier 5 and at the input of the alarm unit 3 are missing, which

triggers a thread break alarm.

The use of a thread breakage sensor eliminates the formation of podmols and thereby reduces the number of strokes in the textile industry.

Claims (2)

Invention Formula A textile thread break sensor containing an electrostatic induction transducer, characterized in that, in order to avoid false alarms, it has a device for blowing the filament with turbulent gas flows: the transducer is installed in the zone of action of a turbulent gas flow. Sources of information taken into account in the examination 1, USSR Author's Certificate NO 26О656, cl. B 65 H 63 / O2. 2. Pathett Switzerland No. 530335, cl. 65 N 63/02 (prototype). / GTGP