JPH0812188A - Stopping control method at proof tester disconnected time - Google Patents

Abstract

PURPOSE:To speed up generation of a stopping signal of a device, and reduce a generating quantity of a defective filament body by performing D/A conversion on a device stopping tensile force threshold value, and comparing an output signal from a tensile force sensor arranged on a guide pulley with the tensile force threshold value by an analog comparator. CONSTITUTION:In a proof tester to wind a filament body 1 sent out of a sending-out bobbin 2 round a winding bobbin 6 through receiving devices 4A and 4B and plural guide pulleys 7 containing a dancer pulley having a test tensile force applying part 5, a device stopping threshold value inputted to a CPU 9 is converted into an analog value by a D/A converter 10, and is inputted to an analog comparator 12. An output signal from a tensile force sensor 8 arranged in an optional one among the guide pulleys is introduced to the analog comparator 12, and here, it is compared with the tensile force threshold value. When a tensile force value is less than the threshold value, it is judged as disconnection, and a stopping signal is immediately outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop control method when the proof tester is disconnected, and more particularly to a stop control method when the proof tester is disconnected so that the actual disconnection to the stop of the apparatus can be performed in a short time.

[0002]

2. Description of the Related Art A linear body such as an optical fiber having a small tensile strength needs to be continuously subjected to a tensile test for a considerable length. An outline of this test generally called a proof test will be described with reference to FIG.

In the figure, reference numeral 2 is a delivery bobbin of the linear body 1 whose tensile strength is to be tested. The linear body 1 delivered from this is a delivery dancer pulley 3A and a delivery side take-up device (belt wrap type cap). Stan) 4A, a take-up device 4B on the take-up side through a test tension applying section 5 of the type using an oscillating pulley.
Finally, the path taken up by the take-up bobbin 6 via the take-up dancer pulley 3B is traced.

The test tension applying section 5 is a weight 51 having a predetermined weight.
Is a device that is slidably adjustable on one of the arms, and continuously applies a set tension for testing to the linear body 1 that is wound around a swing pulley provided on the other end of the arm. Of course, this set tension can be arbitrarily adjusted by the above method.

If the filament 1 breaks, the proof tester must be stopped as quickly as possible.
If the stop of the device is delayed, for example, in the case of an optical fiber, the winding end of the take-up bobbin 6 is delayed and the broken line end is caught up, and the line end may cause the surface of the optical fiber previously wound. Because it hits and damages. For this reason, conventionally, the following stopping method has been adopted at the time of disconnection.

That is, as shown in FIG. 3, a tension sensor 8, which is a pressure detecting device such as a load cell, is attached to the shaft of one of the guide pulleys around which the filament 1 is wound, for example, the guide pulley 7. A device is provided for monitoring fluctuations in the tension of the linear body 1 wound around the guide pulley 7. That is, when the tension becomes extremely small, it is determined that the wire is broken, and the operation of the apparatus is stopped.

Actually, the analog signal from the tension sensor 8 is amplified by the amplifier 101, and the appropriate A / D converter 1
It is converted into a digital signal by 02 and sent to the central processing unit (CPU) 9 and compared with the digital tension value for stopping the device which is inputted in advance, and it is judged to be equal to or less than this value. The procedure is to turn on the brake of the rear winder.

[0008]

However, this conventional method has a drawback that a delay occurs until the apparatus actually stops due to the following reasons. FIG. 2 is a graph in which the horizontal axis represents time and the vertical axis represents the tension value at the time of wire breakage. If the wire breakage occurs at point P (time t ₁ ) in the graph. , The tension curve drops rapidly. The action to stop the device starts only when the tension is reduced and the limit tension value for actually stopping the operation of the proof tester, that is, the point Q of the tension threshold value Ts is reached (time t ₂ ). As shown in FIG. 3, even when the tension of the filament 1 reaches the threshold value Ts, this is converted into a digital value, and the stop signal is not actually issued until the CPU 9 compares the digital values with each other. That is, the up to the point the tension of striatal 1 reaches the CPU is changed into a digital value R (time t ₃ in this case) is greater disadvantage stopping the device does not activate.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and the means taken by the present invention for solving this problem is that the filaments sent out from the delivery bobbin are taken up by a take-up device, In a proof tester adapted to be wound around a winding bobbin via a plurality of guide pulleys including a dancer pulley provided with a test tension applying section, the tension for stopping the device input to the central processing unit. The threshold value is converted into an analog value by D / A conversion and input to an analog comparator, and an output signal from a tension sensor provided on any one of the guide pulleys is guided to the analog comparator, To output a stop signal for the proof tester by comparing the analog tension threshold in a comparator A stop control method of the proof tester during disconnection, characterized in that the.

[0010]

The tension threshold value for stopping the device, which is input to the central processing unit, is converted into an analog value by D / A conversion and input to the analog comparator, and the tension sensor from the tension sensor provided on the guide pulley is used. The output signal is led to this analog comparator and compared with the tension threshold value which has already been input here by the analog value. Therefore, the stop signal of the device is issued faster without the time required for A / D conversion.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described with reference to FIG.
The tension threshold value Ts input to the CPU 9 is D
The value is converted into an analog value by the / A converter 10 and is stored in the analog comparator 12.

On the other hand, as shown in FIG. 1, the analog signal from the tension sensor 8 of the proof tester is amplified by an amplifier 11 and led to an analog comparator 12, where the tension threshold value Ts and the analog value which have already been input are commingled. To compare and calculate. Of course, the tension value from the tension sensor 8 is ≤Ts
A stop signal will be issued immediately when. Specifically, this stop signal turns on a brake relay that stops the rotation of the winding bobbin 6.

According to the present invention, the time required for converting the tension threshold value Ts into a digital value and sending it to the CPU is omitted. Therefore, as can be seen from FIG. 2, the stop signal is issued for the time (t ₃ -t ₂ ). The effect is that the time can be advanced and the generation of defective striatum can be prevented accordingly.

[0014]

According to the present invention, the tension threshold for stopping the device, which is input to the central processing unit, is converted to an analog value by D / A conversion and input to the analog comparator, and the guide pulley The output signal from the tension sensor provided in the device is guided to this analog comparator and compared with the tension threshold value that has already been input here and the analog value. Therefore, the device is faster without the time required for A / D conversion. There is an advantage that the stop signal can be issued, and there is an effect that the occurrence of defective striatum can be eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram showing signal processing from a tension sensor for carrying out the method of the present invention.

FIG. 2 is a graph showing changes in tension when a wire breaks.

FIG. 3 is a side view illustrating a conventional stop control method when a proof tester is disconnected.

[Explanation of symbols]

 1 linear body 2 delivery bobbin 3A delivery dancer pulley 3B take-up dancer pulley 4A, 4B take-up device 5 test tension applying section 6 take-up bobbin 7 guide pulley 8 tension sensor 9 central processing unit (CPU) 10 D / A converter 11 Amplifier 12 Analog comparator

Claims (1)

[Claims] 1. A plurality of guide pulleys (7) including a linear device (1) sent from a sending bobbin (2), and a take-up device (4A, 4B) and a dancer pulley provided with a test tension applying section (5). , ...), the tension threshold value (Ts) for stopping the device input to the central processing unit (9) is set to D in the proof tester which is adapted to be wound onto the winding bobbin (6). It is converted into an analog value by A / A conversion and input to the analog comparator (12), and an output signal from a tension sensor (8) provided on any one of the guide pulleys is input to the analog comparator (12). Guide this analog comparator (12)
2. A stop control method at the time of wire breakage of the proof tester, wherein the stop signal of the proof tester is output by comparing with the analog tension threshold value (Ts).