KR20020081478A - Method for sensing and counting windings being drawn off a drum, as well as a device for carrying out said method - Google Patents

Abstract

In a method and apparatus for sensing and counting a series of windings (4) released from a supply drum (5) of a radiation preparation device, the windings (4) are characterized in that the windings (4) allow the windings to be released between the transmitter and receiver of each sensor. Each time it is detected by a detection device 8 comprising at least two sensors arranged in a sequence of light transmitters 10 and 12 and light receivers 11 and 13 arranged in a passing manner, The pulses are blocked and then evaluated as a winding in which the continuous pulses are released, and the light intensity that the receiver receives from the transmitter is determined at each sensor, and if the light intensity falls below a certain predetermined value at any one of the receivers, The pulse from the sensor in question is no longer counted in the evaluation, and is evaluated as one winding in which the pulse from another sensor is released.

Description

METHOD FOR SENSING AND COUNTING WINDINGS BEING DRAWN OFF A DRUM, AS WELL AS A DEVICE FOR CARRYING OUT SAID METHOD}

A method of the kind as described above, as well as an apparatus for implementing the method, is described in US Pat. No. 4,852,617.

In this conventional arrangement, radiation passes through a ring placed after a drum on which a pair of sensors are mounted to sense and count the windings coming off the feed drum. Each sensor consists of an optical transmitter and receiver arranged in such a way that the light beam between the transmitter and the receiver is blocked by the unwinding radiating winding passing lightly through the ring. In this way, the light rays between the transmitter and receiver of each sensor are once blocked by all windings released, thus causing two blocking pulses for each winding released. The pulse is provided to a first evaluator that counts two consecutive pulses into one winding that is released.

In the case of this conventional device, the spinning winding gently rubs off the inside of the ring to remove dust deposited inside the ring. In practice, however, nevertheless after a while, contamination of one or both sensors naturally occurs. This leads to a reduction in the intensity of the incident light on the receiver, which is a problem caused by the contamination, as the pulse generated by the blocking of light is too small to ensure a reliable measurement. This means that if either sensor is contaminated, the sensor must be cleaned after stopping the machine. Indeed, if one of the two sensors is contaminated to such an extent that the two sensors rarely exhibit the same degree of contamination, and thus no more reliable pulses can be generated, the other sensor will not be contaminated at all or will only be contaminated small. Of course, the another sensor will continue to deliver a pulse of useless intensity.

The present invention is based on the finding that pulses generated by an uncontaminated sensor continue to provide an accurate indication of all windings released.

It is an object of the present invention to provide a method in accordance with the foregoing aspects, wherein the interval between sensor cleaning operations can be longer than in conventional devices.

The present invention relates to a method for sensing and counting a series of windings released from a supply drum of a yarn-preparing device, wherein the windings are the light beams between the transmitter and receiver of each sensor. A detection device comprising at least two sensors arranged in turn, each of which consists of an optical transmitter and an optical receiver arranged in such a way as to pass through them, a pulse is generated each time the light is blocked, and one continuous pulse is released Is evaluated as windings.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Figure 1 is a block diagram of a weaving device showing only a part of the weaving device shown to aid the understanding of the present invention.

2 and 3 are elevational views of the winding counter used in the weaving device shown in FIG.

The method according to the invention for achieving the object as described above, the problem is that the light intensity that the receiver receives from the transmitter is determined at each sensor, and if either of the receivers falls below a certain predetermined value, the problem is The pulse from the sensor is no longer considered in the calculation, and is evaluated as one winding releasing the pulse from another sensor.

According to the method according to the invention, the intensity of incident light is measured at each receiver, and if either of the sensors falls below a predetermined value, the machine will not stop, but it will no longer calculate the pulses from the sensor in question. Without considering this, evaluate each pulse from another sensor as one winding to be released. In this way, the machine does not need to be stopped, but since the machine must be shut down to clean the two sensors, the light intensity is initially reduced on uncontaminated sensors until reliable pulse measurement is no longer possible. The operation can continue until the moment. In this way, the stop circumference interval of the machine for cleaning the sensor is longer than that of the conventional apparatus.

The determination of the light intensity at the two sensors and the comparison with a predetermined threshold, as well as a decision to evaluate based on pulses from both sensors or based on pulses from uncontaminated sensors, can be made entirely by software. have.

For example, the method according to the invention can be carried out by using a winding detection device consisting of only two sensors arranged in turn, but it is also possible to carry out the method using a detection device consisting of several sensors each arranged. If the first sensor is contaminated, the sensor may be turned off and counting may occur based on pulses from another sensor. Next, if another sensor is contaminated, this sensor is also turned off and a count may occur based on pulses from the remaining uncontaminated sensor. All sensors in all these devices reach a degree of contamination that can no longer produce reliable pulses. After that, the machine must be stopped to clean the sensor.

According to a further embodiment of the method according to the invention, a pulse from a sensor can be provided to the first evaluator, detected as one winding in which successive pulses are released, and the light intensity at any one of the receivers is predetermined. Falling below the threshold of, a pulse from another receiver is provided to another evaluator, and the pulse is detected with one winding out.

In another embodiment of the method according to the invention, the light intensity received by the receiver is measured at each sensor and the light intensity of the coupled receiver is closed and the excitation of the transmitter is exceeded when a certain excitation value is exceeded. The value is increased and the evaluation of the pulse from the sensor in question is stopped.

Moreover, the present invention provides an apparatus suitable for carrying out the method according to the present invention. The device consists of a radiation-preparation device consisting of a supply drum which can be wound around a number of spinning windings that are continually released to be fed to the weaving machine, the winding detection device being arranged on or immediately after the supply drum and detecting the The device consists of at least two sensors arranged in sequence including each optical transmitter and optical receiver arranged in such a way that the unwinding winding blocks the light beam between the transmitter and the receiver of each sensor, the pulse being caused by each blocking The device consists of a first evaluator which is connected to each sensor via a signal line and can be counted as one winding in which successive pulses are released. The apparatus consists of at least one other evaluator, the apparatus further comprising a comparator for measuring the intensity of the incident light of the receiver and comparing it to a threshold, and turning the other evaluator if the light intensity is higher than the threshold on all sensors. Turn off the first evaluator if the light intensity is below a threshold, at least one of the sensors, and by another sensor of the other evaluator; It is characterized by providing a control means for processing the generated pulse.

Another embodiment of the device is characterized in that a switch is connected to the sensor and the evaluation period signal line and can be opened and closed by the control means. In yet another embodiment, the comparator is coupled to an electronic controller capable of turning the evaluator on or off.

1 shows a part of a weaving device to aid in a full understanding of the present invention, in which reference number 1 is rotated in a manner not shown such that a plurality of windings 4 are wound around a feed drum 5. Indicates a bobbin exiting towards the winding arm 3. The feed 2 is sent from the feed drum 5 to an injector 6 which feeds the yarn to the shed 7 of the weaving machine. The radiation 2 is transmitted from the feed drum 5 past the ring-shaped winding counter 8 in this embodiment. The winding counter 8 is in the form of a ring of transparent material, as shown in FIGS. 2 and 3. A pair of sensors composed of an optical transmitter 10, an optical receiver 11, and an optical transmitter 12 and an optical receiver 13 are mounted on the ring 9, respectively. Light rays between transmitter 10 and receiver 11 are indicated by reference numeral 14, while another ray between transmitter 12 and receiver 13 is denoted by reference numeral 15. Rays 14 and 15 are pulses generated at receivers 11 and 13, respectively, and are continuously blocked by each winding that is released. Optical receivers 11 and 13 are connected to amplifiers 18 and 19 via signal lines 16 and 17 as well as to comparators 20 and 21. The amplifiers 18 and 19 are in turn connected to the first evaluator 24, the second evaluator 25 and the third evaluator 26 via signal lines 22 and 23, respectively. Comparators 20 and 21 are connected to electronic control device 29 via signal lines 27 and 28, respectively, which are connected to evaluators 24, 25 and 26 via signal lines. The evaluators 24, 25, 26 are respectively connected via signal lines 30 to signal lines 30 connected to other control devices of the weaving machine.

The operation of the apparatus is as follows. Rays 14 and 15 are continuously blocked by each winding that is released from the supply drum. Thereby, a blocking pulse is generated, and the pulses are supplied to the amplifiers 18 and 19 via the signal lines 16 and 17 by the receivers 11 and 13. Comparators 20 and 21 measure the intensity of incident light at receivers 11 and 13. If the intensity of the light exceeds a predetermined value, it means that the transmitters 10 and 12 and the receivers 11 and 13 are only slightly contaminated, and at least if so, a signal is generated at the controller 29 and the signal is in operation. The evaluator 24 and render devices 25 and 26 are stopped. Next, the cutoff signals from receivers 11 and 13 are provided to the evaluator 19 via amplifiers 18 and 19, respectively, which are processed into one winding through which two consecutive pulses from receivers 11 and 13 are released. It means to be counted by (24). The signal corresponding thereto is provided to the signal line 30 by the evaluator 24. If any of the two sensors, for example, sensors 10 and 11, is contaminated, the intensity of incident light on the receiver 11 falls below the predetermined value indicated by the comparator 20. The comparator 20 then generates a signal and transmits it to the control device 29 as the control device operates the evaluator 26 without operating the evaluators 24 and 25. Thus, the next blocking pulse generated by the receiver 11 is no longer processed, while control is made on the basis of the blocking pulse formed by the receiver 13 and processed in the evaluator 26, wherein each pulse Is counted as one winding that is released. In this way, the evaluator can now count the windings released by the two motion sensors, and if either of the sensors is contaminated, the evaluator can continue to operate based on the blocking pulse from another sensor. . In this way, the interval between sensor cleaning operations is significantly extended, which significantly increases the efficiency of the device.

Although comparators 20 and 21 measure the intensity of incident light on receivers 11 and 13 and compare it with the threshold of the example described above, a high excitation value that increases the light intensity is used in the optical transmitter 10 or 13, thereby providing optical When a decrease in intensity is detected, the comparator may first transmit a signal to the exciters 33 and 34 via the signal lines 31 and 32, and to the value at which the above-described control operation starts until the excitation value exceeds a predetermined level. The signal is not considered as a signal indicating that contamination of the problem sensor has been reached.

In Figure 2, the winding counter consists of opposed transmitters 10, 12 and receivers 11, 13, with rays 14 and 15 passing through the space in the ring, respectively. As shown in FIG. 3, a reflector 35 may be arranged in the ring, the transmitter 10 and the receiver 11 are located close to each other, and the light from the transmitter 10 is transmitted to the receiver (at the reflector 35). 12) is reflected. The same is true of the receiver 13 and the transmitter 12. Also in this case, the receivers 11 and 13 are connected to the same control device as in Fig. 2 via signal lines 16 and 17.

Although the present invention has so far described a winding device in the form of a ring with a sensor mounted therein, the present invention can be effectively used as a winding counter in which the sensor is arranged in axial direction in turn.

In the embodiment according to FIG. 2, the blocking pulses from receivers 11 and 13 are fed to the evaluators 24, 25 and 26 via signal lines 16 and 17 and amplifiers 18 and 19 in all situations, the evaluator having one sensor, or Depending on the degree of contamination of both sensors, it may or may not be operated by the controlling device in question. Under certain circumstances, the evaluator may place a disconnect switch for each signal line, which switch is operated appropriately by the control device 29.

In the above example, two different evaluators 25 and 26 are provided for counting pulses from any of the sensors 10, 11 and 12, 13 under certain circumstances. In addition, it may be used only in any one of the evaluators, may be used only in the case of contamination of any one sensor provided to the one evaluator, the pulse from another sensor, the next winding to release each pulse provided You can count.

In addition, data from comparators 20 and 21 may be provided to a display panel (not shown) in which the contamination state of the sensor is displayed. Based on that, a manual change can be made by a situation in which pulses from both sensors are counted in a situation where only pulses from uncontaminated sensors are counted.

Although the invention has been described above with respect to a device consisting of a winding detection device comprising two sensors arranged one after the other, the present invention utilizes several sensors placed in turn, for example a detection device comprising three sensors, in the same manner. Can be executed.

Claims (7)

A method for sensing and counting a series of windings released from a feed drum of a spinning preparation device, The winding is sensed by a detection device comprising at least two sensors arranged in turn, each of which consists of an optical transmitter and an optical receiver, in which the unwinding winding is arranged in such a way as to pass the light beam between the transmitter and receiver of each sensor, and the pulse is Generated each time the light is interrupted, and then evaluated as a winding in which a continuous pulse is released, the light intensity that the receiver receives from the transmitter is determined at each sensor, and if either light receiver If it falls below stationary, the pulse from the sensor in question is no longer counted in the evaluation, and the pulse from another sensor is evaluated as one winding out. A pulse from another receiver according to claim 1, wherein a pulse from the sensor is provided to the first evaluator, the continuous pulse is detected as one winding unwinding, and if the light intensity drops below a certain threshold on either of the receivers, a pulse from another receiver. Is provided to another evaluator, wherein the pulse is detected as one winding out. The method according to claim 1 or 2, wherein the light intensity received by the receiver is measured at each sensor, and the excitation value of the transmitter is increased when the light intensity is decreased at the coupled receiver, and if it exceeds the specified excitation value, The excitation of the pulse is stopped. Apparatus for appropriately carrying out the method according to claim 1, 2 or 3, wherein It consists of a radiation-preparation device consisting of a supply drum into which a number of radial windings which can be unwound from the supply drum to be fed to the weaving machine is constructed, and the winding detection device is a generated pulse, the unwinding winding of each sensor Consisting of at least two sensors arranged in sequence, each of which comprises an optical transmitter and an optical receiver, arranged in such a way as to block the light beams between the transmitter and receiver, the device being connected to each sensor via a signal line and a continuous pulse being released And a first evaluator which can be counted with a winding of the device, the device comprising at least one other evaluator, the device further comprising a comparator for measuring the intensity of the incident light of the receiver and comparing it with a threshold value The other evaluator if the light intensity is above the threshold for all sensors Turn off, process pulses generated by all sensors of the first evaluator, turn off the first evaluator if at least one of the sensors is below the threshold, and turn off the first evaluator; And control means for processing the pulse generated by the sensor. The apparatus of claim 4, wherein a switch is connected to the sensor and the signal line of the evaluation period, and can be opened and closed by the control means. 5. The apparatus of claim 4, wherein the comparator is connected to an electronic control device capable of turning on or off the evaluator. The device according to any one of claims 4 to 6, wherein the comparator is connected to a display panel which can indicate to the sensor whether the light intensity is below or above the predetermined threshold.