阅读说明：本技术 基于线激光扫描成像检测的异性纤维检测分离装置 (Foreign fiber detection and separation device based on line laser scanning imaging detection ) 是由 张若宇 庞宇杰 张梦芸 文智宇 江英兰 于 2019-12-03 设计创作，主要内容包括：本发明涉及一种棉花加工过程中的异性纤维检测分离装置,包括喂料装置、激光扫描成像检测装置和气流分离装置,本发明是通过喂料口将棉花从输送滑板上滑下,在输送滑板两面设置基于线激光扫描成像的异性纤维检测装置,实时采集棉流两面的图像信息,通过图像处理程序实现异性纤维的检测,最后利用检测系统控制程序驱动气流式分离装置将混有异性纤维的棉花分离,从而实现在棉花加工过程中异性纤维的高效清理；与目前现有的技术相比,本发明采用基于线激光扫描成像的检测原理,对棉花中混入的异性纤维进行检测,异性纤维检测准确率更高,检测速度更快,可用于棉花加工企业在线的异性纤维分离。(The invention relates to a foreign fiber detection and separation device in a cotton processing process, which comprises a feeding device, a laser scanning imaging detection device and an airflow separation device, wherein cotton slides down from a conveying sliding plate through a feeding port, the two sides of the conveying sliding plate are provided with foreign fiber detection devices based on line laser scanning imaging, the image information of the two sides of the cotton flow is collected in real time, the foreign fiber detection is realized through an image processing program, and finally, a detection system control program is utilized to drive the airflow separation device to separate cotton mixed with the foreign fiber, so that the high-efficiency cleaning of the foreign fiber in the cotton processing process is realized; compared with the prior art, the method adopts the detection principle based on line laser scanning imaging to detect the foreign fiber mixed in the cotton, has higher foreign fiber detection accuracy and higher detection speed, and can be used for the online foreign fiber separation of cotton processing enterprises.)

1. The utility model provides a foreign fiber detects separator based on line laser scanning formation of image detects which characterized in that: set gradually from left to right: the device comprises a feeding port (5), a conveying sliding plate (2), a line laser light source (6), a linear array scanning camera (8), a computer (9), a nozzle (10), a foreign fiber outlet (1) and a cotton outlet (11); the cotton feeding device is characterized in that the feeding port (5) is positioned at the upper left of the whole machine device, a cotton conveying area is arranged below the feeding port (5), cotton is conveyed in a sliding mode by installing a conveying sliding plate (2) forming a certain angle with the ground, and an imaging device is arranged in the middle of the conveying sliding plate (2) and used for collecting cotton images; the image forming apparatus includes: the linear laser scanning device comprises a linear laser light source (6) and a linear array scanning camera (8), wherein the linear laser light source (6) and a conveying sliding plate (2) keep a certain angle, and the linear array scanning camera (8) and a conveying interface of the conveying sliding plate (2) keep vertical; the projection area of the linear laser light source (6) on the conveying sliding plate (2) is overlapped with the image acquisition area of the linear scanning camera (8); a foreign fiber outlet (1) and a cotton outlet (11) are sequentially arranged below the tail end of the conveying sliding plate (2); a nozzle (10) is arranged right above the foreign fiber outlet (1);

the computer (9) is connected with the linear array scanning camera (8) and the nozzle (10) through a data transmission line, the computer (9) carries out image processing and foreign fiber identification on images transmitted by the image of the linear array scanning camera (8), drives the nozzle (10) to eject high-speed gas according to the image processing and foreign fiber identification results, ejects foreign fibers into the foreign fiber outlet (1), separates the foreign fibers, and allows the residual cotton to enter the cotton outlet (11).

2. The foreign fiber detecting and separating device according to claim 1, wherein: the imaging devices can be arranged into two sets and are respectively arranged at the upper end and the lower end of the conveying sliding plate in a staggered manner; the imaging device at the upper end of the conveying sliding plate is used for acquiring an upper-layer image of cotton, the imaging device at the lower end of the conveying sliding plate acquires a lower-layer image of the cotton through a light-transmitting window (7) of the conveying sliding plate, and foreign fiber detection is performed on the upper-layer cotton image and the lower-layer cotton image acquired by the two imaging devices through a foreign fiber image detection program.

3. The foreign fiber image detection program according to claim 2, wherein: the image detection program mainly comprises the following parts: 1) single-channel gray image extraction: image color space transformation, selecting single-channel gray image in optimal color space for subsequent processing; 2) grayscale morphological operations: performing morphological expansion operation on the extracted gray level image to enable the difference between the mulching film and the cotton in the image; 3) histogram equalization: enhancing the image contrast by counting the gray image histogram and carrying out equalization processing; 4) threshold value: performing threshold segmentation on the preprocessed image, wherein the threshold is obtained by calculation according to an Ostu method, and the calculation result is a binary image; 5) removing a communicated area: and (4) counting the size and other attributes of the connected region in the binary image, filling the connected region smaller than a set value, and completing the detection of the foreign fiber in the laser scanning image.

4. The foreign fiber detection and separation device based on line laser scanning imaging detection as claimed in claim 2, wherein: the imaging device and the nozzle can be arranged in multiple stages, and the next stage separates different fibers of the cotton separated by the previous stage, so that the different fiber separation effect with higher precision is realized.

Technical Field

The invention relates to a foreign fiber separation device in a cotton processing process, in particular to a foreign fiber detection and separation device based on online laser scanning imaging detection, and belongs to the field of agricultural machinery.

Background

China is a big cotton production and consumption country in the big cotton production country, and foreign fibers such as residual films, hairs and the like are easily mixed in the cotton in the processes of harvesting, packaging, carrying, loading, unloading and storing. The mixing of foreign fibers can seriously affect the quality of cotton yarns and textiles, thereby bringing great economic loss to cotton processing and textile enterprises. At present, mechanical modes such as winding type are mainly used in the cotton processing process to clean up foreign fibers in cotton, the mode is mainly effective for large foreign fibers, small foreign fibers cannot be effectively cleaned up, the foreign fibers can be broken and discolored after ginning and are smaller and difficult to detect, and ginned cotton obtained by ginning inevitably contains foreign fibers such as mulching films.

The machine vision detection technology has the advantages of no damage, rapidness, accuracy, high automation degree and the like, and is widely applied to the field of quality and safety detection of agricultural products, food, meat and the like. The machine vision imaging mode is mainly divided into an area array mode and a linear array mode. Compared with area array imaging, linear array scanning imaging mainly has the advantages of high resolution, high detection speed and the like, and is suitable for the requirements of machine vision detection on speed and accuracy in the field of cotton processing.

Because the cotton fiber is fine and cloudy after being fully opened, the cotton fiber has loose structure, larger fiber elasticity, a plurality of pores in the fiber and among the fibers, and uneven polymer surface, and is a light and sparse substance. When parallel incident light is obliquely irradiated, the reflected light rays are diffuse reflection light with weak directions, the reflectivity of the cotton fiber is small, and the optical performance is poor. Compared with cotton fibers, common foreign fibers are relatively thick, are long linear or blocky, have compact and flat surfaces and are light-dense substances. When the parallel incident light irradiates, the reflected light is mirror reflection parallel light, the reflectivity is larger, and the optical performance is excellent. Therefore, the difference of the optical properties of the cotton and the cotton can be used for distinguishing white foreign fibers in the cotton.

Therefore, the method for detecting the foreign fiber by adopting the line laser scanning imaging can realize the high-efficiency separation of the cotton and the foreign fiber under the condition of no damage by carrying out double-sided detection on the foreign fiber in the cotton flow.

Disclosure of Invention

The invention aims to provide a cotton foreign fiber separating device which has the advantages of good separating effect, simple structure, high working efficiency, no damage and suitability for cotton processing factories.

The purpose of the invention is realized by the following technical scheme:

the invention designs a foreign fiber detection and separation device based on line laser scanning imaging detection, which is characterized in that: comprises a feeding port, a conveying sliding plate, a linear laser light source, a linear array scanning camera, a computer, a nozzle, a foreign fiber outlet and a cotton outlet; the cotton cleaning device is characterized in that the feeding port is located at the upper left side of the whole machine device, the conveying sliding plate is connected with the upper end of the feeding port and located below the feeding port, cotton enters the cotton cleaning device from the feeding port and slides down through the conveying sliding plate, an imaging device is arranged for collecting cotton images when the cotton is conveyed through the conveying sliding plate, the imaging device mainly comprises a linear laser light source and a linear array scanning camera, the linear laser light source and the conveying sliding plate keep a certain angle, the projection area of the linear laser light source on the conveying sliding plate is consistent with the shooting area of the linear array scanning camera, the computer is connected with the camera and the nozzle through a data transmission line, the computer performs image processing and foreign fiber identification on images transmitted by the linear array scanning camera, the nozzle is driven to separate foreign fibers according to results, the foreign fibers are conveyed into a foreign fiber outlet under the action of air.

The device is characterized in that a transparent layer is arranged on a conveying sliding plate, the number of imaging devices is two, one imaging device above the conveying sliding plate is used for acquiring an upper-layer image of cotton, the other imaging device below the conveying sliding plate acquires a lower-layer image of a cotton flow through the transparent layer of the conveying sliding plate, and the foreign fiber image detection program performs foreign fiber detection through the acquired upper-layer and lower-layer cotton images of corresponding cotton.

Compared with the prior art, the invention adopts the line laser scanning imaging image detection method, and can realize the high-efficiency detection of the foreign fiber in the cotton; the linear scanning imaging scheme of the linear array camera has the advantage of high speed, so that the detection speed of cotton processing enterprises in actual production can be met; the scheme of upper and lower double-sided detection is adopted, so that the detection of the foreign fibers hidden on the upper and lower double sides of the cotton flow is facilitated, and the detection efficiency is higher; and an air flow separation method is used, in the process, the cotton fiber is separated without damage.

Drawings

FIG. 1: schematic diagram of double-surface line laser scanning imaging foreign fiber detection and separation device

FIG. 2: foreign fiber detection image processing effect graph

In the diagram 1: 1. the device comprises a special fiber outlet, 2. a conveying sliding plate, 3. special fibers, 4. cotton, 5. a feeding port, 6. a line laser light source, 7. a transparent layer, 8. a linear array camera, 9. a computer, 10. a nozzle and 11. a cotton outlet.

In the diagram 2: a, b are cotton images under red and blue laser irradiation, and c, d are the results after image processing.

Detailed Description

Referring to fig. 1, the present embodiment: set gradually from left to right: the device comprises a feeding port (5), a conveying sliding plate (2), a line laser light source (6), a linear array scanning camera (8), a computer (9), a nozzle (10), a foreign fiber outlet (1) and a cotton outlet (11); the cotton feeding device is characterized in that the feeding port (5) is positioned at the upper left of the whole machine device, a cotton conveying area is arranged below the feeding port (5), cotton is conveyed in a sliding mode by installing a conveying sliding plate (2) forming a certain angle with the ground, and an imaging device is arranged in the middle of the conveying sliding plate (2) and used for collecting cotton images; the image forming apparatus includes: the linear laser scanning device comprises a linear laser light source (6) and a linear array scanning camera (8), wherein the linear laser light source (6) and a conveying sliding plate (2) keep a certain angle, and the linear array scanning camera (8) and a conveying interface of the conveying sliding plate (2) keep vertical; the projection area of the linear laser light source (6) on the conveying sliding plate (2) is overlapped with the image acquisition area of the linear scanning camera (8); a foreign fiber outlet (1) and a cotton outlet (11) are sequentially arranged below the tail end of the conveying sliding plate (2); a nozzle (10) is arranged right above the foreign fiber outlet (1); computer (9) pass through data transmission line with linear array scanning camera (8) and nozzle (10) are connected, and image processing and different fine discernment are carried out to the image that linear array scanning camera (8) image was afferent in computer (9) to according to image processing and different fine discernment result drive nozzle (10) erupt high-speed gas, spout different fine export (1) with different fine, separate different fine, the cotton after cleaning gets into cotton export (11).

During operation, the identification and separation of foreign fibers in cotton are realized by a linear array scanning laser imaging detection method, and the cotton enters the conveying sliding plate (2) through the feeding port (5) to slide at a constant speed; when the cotton reaches an image acquisition area, a linear laser light source (6) irradiates the cotton, a linear array scanning camera (8) acquires cotton images in real time, due to different optical reflection characteristics of different fibers and the cotton, linear laser forms bright stripes on the surfaces of the different fibers, the brightness of the bright stripes is obviously greater than the reflection brightness of the surface of lint cotton, as shown in figure 2, two sets of imaging devices are arranged, one set of imaging device above the middle of a conveying sliding plate is used for acquiring upper-layer images of the cotton, a transparent layer (7) is arranged on the conveying sliding plate (2), one set of imaging device below the conveying sliding plate acquires bottom-layer images of the cotton through the transparent layer (7) of the conveying sliding plate, and a computer (9) performs threshold segmentation and other processing on the acquired images of the upper layer and the lower layer of a cotton flow by operating an image processing program to identify and detect the different fibers mixed in the cotton.

Finally, high-speed gas is released through a driving nozzle to separate foreign fibers; the imaging device and the airflow separation device can be arranged in multiple stages, and the next stage performs secondary foreign fiber separation on the cotton separated by the previous stage; finally, the cotton containing the foreign fibers is sent into a foreign fiber outlet (1), and the cleaned cotton enters a cotton outlet (11).

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various modifications and variations without departing from the technical principle of the present invention, and such modifications are also within the scope of patent protection.