CN104532452A - Device and method for detecting weft breakage and weft completion of circular knitting machine on basis of image technology - Google Patents

Abstract

The invention provides a device and method for detecting weft breakage and weft completion of a circular loom based on image technology. The detection method comprises: acquiring the image of the shuttle tube under the normal working state of the circular loom through a CCD camera and sending it to a computer for processing, and saving the processed image as a matching model; The image of the tube is sent to the computer for processing and saving, and the processed real-time image is compared with the matching model saved in the first step; the comparison result is analyzed to determine whether the weft is broken or finished. If the tube does not rotate, it can be judged that the weft is broken. If from a certain moment, the color of the shuttle is not the color of the yarn, but the image color of the exposed shuttle, then it can be judged that the weft is complete. The invention provides a very reliable device and method for detecting weft breakage and weft completion of conductive fibers such as carbon fibers in the textile industry.

Description

Device and method for detecting weft breakage and weft completion of circular loom based on image technology

technical field

The invention relates to the field of textile machinery, in particular to a circular loom weft breakage and weft completion detection device and method based on image technology that can be used to detect the weaving of conductive fibers such as carbon fibers.

Background technique

The current existing technology is to use an additional electromagnetic device to realize the detection of weft breakage and weft completion of circular looms. Using the working principle of electromagnetic induction, when the circular loom is running normally, the weft yarn pulling shuttle drives the rotor of the transmitter in the detection device to rotate to generate a pulse signal, which is transmitted to the receiver through electromagnetic waves. When the weft is broken, the weft yarn cannot be pulled by the shuttle. The rotor rotates, so the transmitter cannot generate a pulse signal, and it is distinguished whether the weft is broken or not according to whether the pulse signal is generated. When the weft is finished, the exposed shuttle will be in contact with the conductive probe that has been in frictional contact with the yarn by spring pressure, causing the weft completion detection circuit to be conducted, thereby detecting the weft completion state.

In practical application, each component of the electromagnetic detection device is affected by many external factors, the stability is not high, and the detection is easy to be inaccurate. The components in the device have a limited service life and need to be replaced frequently. The fatigue and damage of the components will affect the sensitivity of the detection device, resulting in a decrease in detection accuracy and work efficiency, making it difficult to guarantee product quality.

Especially when weaving high-performance conductive fibers such as carbon fibers, this detection method fails because the fibers themselves are conductive. Carbon fiber is very easy to fluff, and this method of detecting weft completion by contact cannot be used, and it is easy to shave and scratch the fiber. Moreover, there is a lot of conductive dust in the space during carbon fiber weaving, which can easily cause problems such as short circuit and fire caused by the original unsealed electromagnetic detection device, and false signal transmission. Carbon fiber dust is also very harmful to workers.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art, and provide a circular loom weft breaking and weft completion detection device and method based on image technology that can be used for weaving conductive fibers such as carbon fibers.

In order to solve the above-mentioned technical problems, the present invention provides a detection device for weft breaking and weft completion of circular loom based on image technology, which is characterized in that it includes at least one CCD camera located above the shuttle of circular loom. The CCD camera is connected to a computer for image processing and analysis.

The present invention also provides a method for detecting weft breakage and weft completion of a circular loom based on image technology, which is characterized in that the above-mentioned detection device for weft breakage and weft completion of a circular loom based on image technology is used, and the specific steps include:

Step 1: Obtain the image of the shuttle tube in the normal working state of the circular loom through the CCD camera and send it to the computer for processing, and save the processed image as a matching model;

Step 2: The CCD camera captures the image of the shuttle in the continuous running state of the circular loom in real time and sends it to the computer for processing and saving, and compares the processed real-time image with the matching model saved in the first step;

Step 3: Analyze and compare the results to determine whether the weft is broken or finished. If the shuttle does not rotate from a certain moment, it can be judged that the weft is broken. If it starts from a certain moment, the color of the shuttle is not yarn. If the thread color is not the color of the image of the exposed bobbin, then the weft completion can be determined.

The invention utilizes an image acquisition device and an image processing technology to detect the weft breakage and weft completion of a circular loom of conductive fibers such as carbon fibers in a non-contact manner. The working state image of the circular loom shuttle is captured by the CCD camera in real time, and the image information of the shuttle is obtained through image processing technology, and then the weft breakage and completion are determined by matching with the image model of the shuttle in the normal working state of the circular loom. latitude. When the circular loom is working normally, the weft yarn drives the shuttle to rotate. If it is judged from a certain moment that the shuttle does not rotate by matching the images collected in real time, it can be judged that the weft is broken. Before the completion of weft, the result of color matching on the surface of the shuttle in the captured image is the color of the yarn. If starting from a certain moment, the color matching result is the color of the yarn that is almost used up after the shuttle is exposed, indicating that the shuttle at this time If the tube is exposed, it can be judged that the weft is complete.

Compared with prior art, the beneficial effect of the present invention is:

The invention is based on the non-contact image detection technology; it only needs to detect the movement state of the shuttle and the color image on the surface of the bobbin to judge the weft break and weft completion. By adopting the image technology detection device and method of the present invention, the detection of weft breakage and weft completion of the circular loom of conductive fibers such as carbon fibers can be carried out, which solves the problem that the previous devices cannot detect. Due to the use of high-precision image processing technology, it has the advantages of high detection accuracy, strong anti-interference ability, high stability, simple and reasonable structure, safe and reliable performance, long service life and easy installation and maintenance. Effectively reduce the harm of carbon fiber dust to workers' health, improve work efficiency and ensure the quality of fabrics. Also can simplify the structure of original shuttle. Therefore, the deficiencies of the prior art are overcome, and a very reliable device and method are provided for the detection of weft breakage and weft completion of circular looms for conductive fibers such as carbon fibers in the textile industry.

Description of drawings

Fig. 1 is a kind of flow chart of the detection method of broken weft and complete weft of circular loom based on image technology;

Fig. 2 is a kind of schematic diagram of the detection device structure of weft breaking and weft completion of circular loom based on image technology, wherein: 1-camera; 2-computer; 3-shuttle wheel; 4-shuttle body; 5-shuttle arm; 6- Shuttle tube; 7-weft yarn; 8-frame.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example

As shown in Figure 2, it is a structural schematic diagram of a detection device for weft breaking and weft completion of a circular loom based on image technology. The detection device for weft breaking and weft completion of a circular loom based on image technology includes a The CCD camera 1 above the shuttle tube 6 of the machine is connected to a computer 2 for image processing and analysis. Described circular loom comprises frame 8, shuttle tube 6, shuttle arm 5, shuttle body 4 and shuttle wheel 3. The shuttle tube 6 is provided with a weft yarn 7 .

The present invention also provides a detection method for weft breaking and weft completion of a circular loom based on image technology, as shown in Figure 1, using the above-mentioned detection device for weft breakage and weft completion of a circular loom based on image technology, the specific steps include:

Step 1: Obtain the image of the shuttle in the normal working state of the circular loom through the CCD camera 1 and send it to the computer 2 for processing, and save the processed image as a matching model;

The second step: the CCD camera 1 acquires the image of the shuttle in the continuous running state of the circular loom in real time and sends it to the computer for processing and saving, and compares and analyzes the processed real-time image with the matching model saved in the first step;

Step 3: Analyze and compare the results to determine whether the weft is broken or finished. If the shuttle does not rotate from a certain moment, it can be judged that the weft is broken. If it starts from a certain moment, the color of the shuttle is not yarn. If the thread color is not the color of the image of the exposed bobbin, then the weft completion can be determined.

Claims (2)

1. one kind based on the circular loom staplings of image technique and the checkout gear of complete latitude, it is characterized in that, comprise at least one and be located at CCD camera (1) above circular weaving machine shuttle pipe, described CCD camera connects the computer (2) being used for image processing and analysis.

2. based on the circular loom staplings of image technique and a detection method for complete latitude, it is characterized in that, adopt according to claim 1 based on the circular loom staplings of image technique and the checkout gear of complete latitude, concrete steps comprise:

The first step: obtain the image of shuttle pipe under circular loom normal operating conditions by CCD camera (1) and send computer (2) process, and being Matching Model by the Image Saving after processing;

Second step: under the continuous operating condition of CCD camera (1) Real-time Obtaining circular loom shuttle pipe image and send computer disposal and preserve, the realtime graphic after process and the first step Matching Model of preserving are analyzed;

3rd step: analyze comparing result, judges loom whether staplings and complete latitude, if from a certain moment, shuttle pipe does not rotate, then can judge staplings, if from a certain moment, the color of shuttle pipe is not yarn color, but expose the color of image of shuttle pipe, then can judge latitude.