DD291310A5

DD291310A5 - APPARATUS FOR CONTACTLESS DETECTION OF THE LEVEL OF PREPARATION COILS

Info

Publication number: DD291310A5
Application number: DD33672089A
Authority: DD
Inventors: Uwe Koenig; Hans-Juergen Wolf; Roland Thiemer; Peter Kunath
Original assignee: Textimaforschung Malimo,De
Priority date: 1989-12-29
Filing date: 1989-12-29
Publication date: 1991-06-27

Abstract

Die Erfindung betrifft eine Vorrichtung zum beruehrungslosen Erfassen des Fuellungsgrades von Vorgarnspulen im Spulengatter einer Ringspinnmaschine mit Strahlschranken, die an einem Vorgarnwechselwagen montiert sind. Das Ziel der Erfindung besteht darin, die Meszzeiten zu verkuerzen und die Genauigkeit des Meszverfahrens zu erhoehen. Die Erfindung loest die Aufgabe, auch bei dynamisch bewegtem Vorgarnwechselwagen eine zuverlaessige Information ueber den Fuellungsgrad und das Leerlaufen von Vorgarnspulen zu erhalten. Die erfindungsgemaesze Loesung besteht darin, dasz der Motor (4) fuer den Antrieb des Vorgarnwechselwagens (3) mit einem inkrementalen Geber (8) gekoppelt ist, der Ausgang des inkrementalen Gebers (8) und der Ausgang des Empfaengers (7) mit einem logischen AND-Gatter (9) verbunden sind, dessen Ausgang an einen Zaehler angeschlossen ist. In weiterer Ausgestaltung der Erfindung ist vorgesehen, dasz Sender (6) und Empfaenger (7) der Strahlschranken als Lichtschranken ausgebildet sind und bei einer Wellenlaenge 10 nm arbeiten, oder in einer anderen Ausgestaltung, dasz Sender (6) und Empfaenger (7) der Strahlschranken mit Ultraschallwellen arbeiten. Fig. 1The invention relates to a device for berührungshrlosen detecting the degree of filling of roving in the creel of a ring spinning machine with beam barriers, which are mounted on a roving car. The aim of the invention is to shorten the menses and to increase the accuracy of the measuring method. The object of the invention is to obtain reliable information about the degree of filling and emptying of roving bobbins, even in the case of a dynamically moved roving changing carriage. The inventive solution consists in that the motor (4) for driving the roving carriage (3) is coupled to an incremental encoder (8), the output of the incremental encoder (8) and the output of the receiver (7) with a logical AND -Gatter (9) are connected, whose output is connected to a counter. In a further embodiment of the invention, it is provided that the transmitter (6) and receiver (7) of the beam barriers are designed as light barriers and operate at a wavelength of 10 nm, or in another embodiment, the transmitter (6) and receiver (7) of the beam barriers work with ultrasonic waves. Fig. 1

Description

The invention will be explained in more detail with reference to an embodiment. Show the corresponding drawings Fig. 1: a schematic representation of a device according to the invention, and 2 shows a block diagram of the electronic components present in the device.

Nach Fig. 1 befindet sich in einem Spulengatter 1 einer nicht näher dargestellten Ringspinnmaschine eine Vorgarnspule 2, deren Garnbelegungsdicke gemessen werden soll. Ein V'orgarnwechselwagen 3 ist mit einem Antrieb, bestehend aus einem Motor 4 und einem Antriebsrad S, versehen. Eine nicht näher dargestellte Strahlschranke, bestehend aus einem Sender 6 und elnom Empfänger 7, ist so am Vorgangswechselwagen 3 montiert, daß die Bewegungsbahn der Vorgarnspule 2 den Strahlengang zwischen Sender β und Empfänger 7 kreuzt, wobei es sich bei den bezeichneten Strahlen sowohl um Lichtwellen in einem bevorzugten Wellenbereich von >10nm als auch um Schallwellen, insbesondere Ultraschallwellen, handeln kann. Der Motor 4 ist mit einem inkrementalen Geber 8 fest gekoppelt.According to Fig. 1 is located in a creel 1 of a ring spinning machine, not shown, a roving bobbin 2, the Garnbelegungsdicke to be measured. A V'orgarnwechselwagen 3 is provided with a drive, consisting of a motor 4 and a drive wheel S. A non-illustrated beam barrier, consisting of a transmitter 6 and elnom receiver 7, is mounted on the process change car 3, that the trajectory of the roving bobbin 2 crosses the beam path between transmitter β and receiver 7, wherein it is at the designated rays both light waves in a preferred wavelength range of> 10nm as well as sound waves, in particular ultrasonic waves, can act. The motor 4 is fixedly coupled to an incremental encoder 8.

Wie aus Fig.2 hervorgeht, sind der Empfänger 7 und der inkremental Geber 8 über ein AND-Gatter 9 logisch miteinander verknüpft. Vom Empfänger 7 werden die Empfängerimpulse A7 und vom inkrementalen Geber 8 die Impulse A8 erzeugt, die in dem AND-Gatter 9 zu den Signalen A9 verknüpft werden und an den Zähler 10 gelangen. Das bedeutet, daß die an den Zähler 10 gelangenden Impulse A9 ein Maß für die Belegungsdicke der Vorgarnspule 2 darstellen, well die Anzahl der vom inkrementalen Geber 8 erzeugten Signale A8 ein Maß für den vom Vorgarnwechselwagen 3 zurückgelegten Weg sind und die vom Empfänger 7 stammenden Signale A7 den Durchgang der äußeren Konturen der Vorgarnspule 2 durch die Strahlschranke signalisieren. Die Ausgangssignale des Zählers 10 können in an sich bekannter Weise, z. B. in der Steuereinheit des Vorgarnwechselwagens, ausgewertet werden.As can be seen from FIG. 2, the receiver 7 and the incremental encoder 8 are logically linked to one another via an AND gate 9. From the receiver 7, the receiver pulses A7 and the incremental encoder 8, the pulses A8 are generated, which are linked in the AND gate 9 to the signals A9 and reach the counter 10. This means that the pulses A9 reaching the counter 10 represent a measure of the filling thickness of the roving bobbin 2, because the number of signals A8 generated by the incremental encoder 8 is a measure of the travel traveled by the roving changing carriage 3 and the signals originating from the receiver 7 A7 signal the passage of the outer contours of the roving bobbin 2 through the beam barrier. The output signals of the counter 10 can in a conventional manner, for. B. in the control unit of the Vorgarnwechselwagens be evaluated.

Claims

1. An apparatus for contactless detection of the degree of filling of roving in the creel of a ring spinning machine, each with a transmitter and a receiver containing beam barriers, which are mounted on a motorized Vorgarnwechselwagen so that during the movement of the same Vorgarnspulen pass the beam path between transmitter and receiver, and the Receiver is connected via a control unit with an evaluation device, characterized in that the motor (4) for driving the Vorgarnwechselwagens (3) with an incremental encoder (8) is coupled, the output of the incremental encoder (8) and the output of the receiver (7) are connected to a logical AND gate (9) whose output is connected to a counter (10).

2. Apparatus for contactless detection of the degree of filling of Vorgarnhülsen according to claim 1, characterized in that the transmitter (6) and receiver (7) of the beam barriers are designed as light barriers and operate at a wavelength> 10nm.

3. A device for the contactless detection of the degree of filling'r Vorgarnhülsen according to claim 1, characterized in that the transmitter (6) and receiver (7) of the beam barriers work with ultrasonic waves.

For this 2 pages drawings

Field of application of the invention

The invention relates to a device for contactless detection of the degree of filling of roving in the creel einoi- ring spinning machine, each with a transmitter and a receiver contain 1 "n beam barriers, which are mounted on a motor-driven process change car so that during c" · movement thereof the roving bobbins the beam path pass between transmitter and receiver, and the receiver are connected via a control unit with an evaluation device.

Characteristic of the known state of the art

According to DD-PS 252 592 a device for contactless detection of the degree of filling of Vorgarnhülsen in the creel on ring spinning machines is known, with transmitter and receiver formed beam barriers, with the aid of the Vorgarnhülsen be scanned, the beam barriers are interrupted by the Vorgarnhülse successively. In this device, a signal is generated by the passing Vorgarnhülsen in the receivers, which is a measure of the occupancy thickness of Vorgarnhülsen and can be evaluated accordingly. With this device, it is also possible to detect the degree of filling of the determination of a leerlaufende'g Vorg-rnhülse addition. But since the signals generated are only in the condition in direct proportion to the thickness of the Vorgarnhülsen assignment, that the movement between the beam barriers and the Vorgarnhülsen is uniform, not every movement of the bobbin wagon can also be used to make a measurement, since most movements the same accelerated or slowed down. This makes it necessary to extend the technological driving cycle of the roving wagon, because the movements with the non-uniform movements during start-up and positioning are not suitable for measurements and the workflow must be subdivided into measuring movements with uniform movement and changes of travel.

Object of the invention

The object of the invention is to shorten the measurement times and to increase the accuracy of the measurement method in devices for contactless detection of the degree of filling of roving in the creel of a ring spinning machine.

Explanation of the essence of the invention

The invention has for its object to provide a device that provides reliable information about the degree of filling and emptying of roving bobbins even with dynamically moving, so accelerated or braked roving shuttle. According to the invention, this object is achieved in that the motor for driving the Vorgarnwechselwagens is coupled to an incremental encoder, the output of the incremental encoder and the output of the receiver are connected to a logical combination circuit whose output are connected to a logical AND circuit.

In a further embodiment of the invention, it is provided that transmitters and receivers of the beam barriers are designed as light barriers and operate at a wavelength> 10 nm or, in another embodiment, that transmitters and receivers of the beam barriers work with ultrasonic waves.