JPS6059165A - Twisted yarn detector by irradiation from two direction crossing at right angles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a method for detecting joints, knots,
High-speed automatic detection of dirt and broken threads.

By irradiating pulsed light alternately with positive pulsed light and reversed-phase pulsed light from two directions orthogonal to the direction in which the thread is unwinding and traveling from the denier diameter, the shape of the thread diameter and the inside of the east diameter of the prefecture are determined. The amount of light that changes due to diffused reflection can be obtained. This device is designed to detect significant changes in light intensity due to seams, knots, dirt, and broken threads.This light intensity change is amplified and shaped, and the difference signal is sent to the next one-shot multi-circuit over time. A method and apparatus for expanding constants, separating signals, providing V-reporting, and detecting and counting defects in denier diameter yarn.

In the past, this type of discrimination detection method has been attempted using mechanisms, electrostatic methods, and optical methods, but they all have their own characteristic defects such as joints, knots, dirt, etc. of denier yarn.
The story of identifying and detecting cut damage was impossible.

Furthermore, the actual situation is inconvenient for work in which yarns of denier diameter are J-cut at high speed.

As a result, the defect detection was missed, and the only way was to admit that the defective part was mixed in, which caused many inconveniences. there were.

These discriminative detections require many open R? It is only natural that 1lrl of research funds were spent on this, and solving these problems will bring about great benefits such as reducing the number of defects, improving twining machines, researching materials, and improving product quality.

The present invention meets the strong requirements of manufacturers and users:
, 7 It was invented to increase the number of children.

In order to eliminate defective products and non-conforming products, we have investigated the fundamental principles of the detection method for determining the denier diameter strands of the knitting method, and we have developed a method and device that solve the problem using a detection method that complies with the basics.

To explain it below, (a) By irradiating near-infrared light with high luminous efficiency in pulses from two orthogonal directions alternately, diffuse reflection and radiation light rate within the detected thread bundle can be increased, and seams and nodules can be detected. It is easy to detect dirt, dirt, and broken threads, and high resolution detection is possible.

(b) Because of the high-frequency pulsed light irradiation, it is possible to detect denier-diameter twisted yarn during high-speed winding, and high-resolution detection is possible without the effects of time lag and afterimages.

(c) Since high-frequency pulsed light oscillation is used, it is possible to detect denier diameter twisted threads with a stable illumination light source, and it is advantageous because discrimination and detection can be performed without being affected by direct ambient light.

(d) The circuit configuration is simple because the electronic circuits for incident light detection and light detection are simplified into an integrated light receiving circuit for separate discrimination detection using an unprecedented orthogonal two-direction irradiation method.
It is said to stabilize the circuit.

(c) Conventionally, the main focus was to detect changes in the shape of the yarn based on the denier diameter, but now we can detect changes in shape and light film by applying light alternately from two orthogonal directions. It was devised for dual use, and solved the contradictory detection of shape and light film change detection by simultaneously discriminating and detecting it.

(d) Since the device has a circuit configuration with a single function, it is stable from beginning to end, and in terms of performance, there are no failures and the manufacturing cost is lower than with a complicated circuit configuration.

(E) High-resolution detection is possible, and multiple parallel arrangements are possible.
It is suitable for centralized management and can be processed by computer.

(f) The process of identifying ultra-fine denier warp yarns is carried out at high speed to detect defects, so early processing is possible and winding work can be carried out efficiently. The present invention provides a method and apparatus that enable advanced discrimination detection processing.

The reason why the project was not successful was because it had been in progress for a long time and there were many circumstances in which the intervention of defective parts was tacitly accepted even though it was absolutely necessary and desired.

Hereinafter, this will be explained with reference to the drawings. FIG. 1 shows the structure of a photodetector, which irradiates reverse-phase pulsed light in the vertically upward direction of FIG. 1 from FIG. 13. Since the reverse-phase large lux light is irradiated from below the running denier yarn in FIG. 1, the yarn bundle is exposed to light and expanded, and light reflection corresponding to the yarn bundle can be obtained. In this light reflection, the light-receiving slit and the object to be detected are parallel to each other in a straight line, increasing the light-receiving area, so that a small amount of reflected light can be received widely and efficiently.

The positive-phase pulsed light is irradiated from FIG. 1, and the complementary light that crosses the light-receiving surface is irradiated through the vertically elongated slit for positive-phase light shown in FIG. 1 and 2. This orthogonal cross irradiation provides extremely sharp light receiving sensitivity on the light receiving surface, and due to this sharp light receiving, it is possible to capture the detailed shape of the object to be detected. By irradiating the positive phase pulsed light with weak light, the figure can be clearly detected. In order to make the light weak, in addition to adjusting the output, the light-receiving sensitivity range is shifted to the red band, and a red light emitting element illuminates the object with a red light source to detect its shape.

The whistle is made up of glass with a reduced length slit-like lens, so it has a wide range of light-gathering ability.Second
The figure is an animated drawing for easily explaining the light emission and light reception of the photodetector shown in FIG. 1. FIG. 2 1 shows a normal phase light emitting device, and FIG. 2 2 shows a reverse phase pulsed light emitting device. FIG. 2 and 3 show the light receiving elements that receive each light,
The light-receiving sensitivity range shown in FIG. 2 and 6 has been plotted. Figure 2 4
is the normal phase pulsed light flux, which passes through the vertical slit as shown in Fig. 2.8.
The cross light-receiving surface illuminates the strongest position in the light-receiving sensitivity range. In FIG. 2, 5, one knee reverse phase pulsed light is irradiated upward from FIG. 2. By alternately irradiating the normal-phase and reverse-phase pulsed light shown in Fig. 2 4.5 to the denier diameter thread, which is the object to be detected, the seams, knots, stains, and breaks in the denier diameter J thread are optically detected. It is.

Figure 3 shows a positive phase and negative phase pulse projection circuit, and Figure 3 1
performs fundamental oscillation, and emits positive phase pulsed light through steps 3 and 4.5 in FIG. In FIG. 3, the normal phase is reversed to form a reverse phase in 2, and the reverse phase/<)less light is projected from FIGS. 6 and 7. Third
In Figure 5, a red light emitting element is used\, and with the adjustment shown in Figure 3,
Detects the shape of the object to be detected. In Figure 3, a near-infrared light emitting element is used to emit the reflected light.If the light receiving sensitivity is weak, the reflected light will not reach 4B M, so it cannot be irradiated. is strong, and in order to increase the light receiving sensitivity, it uses near infrared light and near infrared light corresponding to the strongest band of near infrared light receiving sensitivity range. Receive each synchronization,
FIG. 4 shows a circuit for converting received light from a photocurrent to a voltage, which converts a weak received light signal current into an amplified voltage, and is placed in front of the circuit for noise resistance and impedance. Darlington amplification and waveform shaping are performed in FIG. 4 3, and the received light signal is outputted through the photocoupler gate 5-6 in FIG. 4. The photocoupler gate is opened by the positive phase pulse synchronization signal in Fig. 4 and 6 in Fig. 4.
are alternately opened and closed using an anti-phase pulse synchronization signal, and a light reception signal pulse is output with each synchronization signal.

The output signal is adjusted to a negative level voltage as shown in FIG. Centering on the sample voltage value, the detection signals of joints, knots, stains, and breakage of abnormal denier yarn are sharply separated into those that are larger and those that are smaller than the sample voltage, and the abnormality No. 3 or 1- is detected. The fourth test is used to detect the occurrence of defective parts.
Discrimination No. 48 is taken out from Figure 8. The signal transmitted differentially from FIG. 48 is expanded to a time period of 1 to 4 pulse widths in FIG. 49.

The sampled voltage value is held as one signal in the holding circuit shown in FIG. 4, 10 until the end of the time period shown in FIG. 4, 9.

As shown in FIG. 4, one sample voltage value and the abnormality signal are compared and only the abnormality signal is output. Immediately after the 0 time period ends, the circuit is reset, and the next pulse sample voltage signal is held and waits for comparison with the abnormality detection signal.

Shift in Figure 5 1 (The abnormality detection signal is sequentially stored and held in the g storage circuit. A calling signal pulse is input from the outside to Figure 5 8, starts oscillation, and shifts the shift register in Figure 5 9. After the operation is completed, the gate of No. 51216 is opened and Fig. 5 1
The signals from the shift signal storage circuit are sequentially sent out @ 5 Figure 7 The signals are sent out from the oven collector circuit.

Eight abnormality signals are stored in FIG. 51. 5th 1
The shift register 9 resets the oscillation circuit (send No. 3,
Clear the functions of each part.

At the same time, the abnormality signal is taken out from 1 in Figure 5 and held in Figure 5, 2, and the trouble No. 43 oscillator in Figure 5 is operated to blink the red warning light according to Figure 5, 4-5, and a trouble occurs. Let me know. After the abnormal signal is sent and the abnormality is removed, the blinking alarm is manually stopped.The purpose of the above device is to detect the occurrence of joints, knots, dirt, and breaks in denier yarn, so it is possible to know the number of abnormality detections and check the product condition. This is the first device devised as a device for recording.

The present invention is a method and apparatus that achieves the object and has a great practical effect by solving a problem that was theoretically considered to be difficult to put into practical use.

[Brief explanation of the drawing]

Figure 1: Explanation diagram of the photodetector Figure 2: Animation diagram of the photodetector Figure 3: System diagram of the light emitting circuit Figure 1: System diagram of the photodetector code conversion and name Figure 5: Detection signal accumulation path and external output system figure patent applicant
Hiroshi Kanno Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] Pulsed light is alternately irradiated with forward pulse and reverse phase pulsed light from two directions orthogonal to the denier strand during high-speed winding, and the shape of the denier strand and changes in light intensity due to diffused reflection within the prefectural east diameter are investigated. A method and apparatus for determining and detecting seams, knots, stains, and broken threads by detection.