< p > the rapid development of automatic detection technology has made further development of the automation level of cotton < a target= "_blank" href= "http://www.pmae.cn/" > textile < /a > machinery. It has played a very important role in improving vehicle speed, improving production efficiency, improving product quality, reducing consumption, saving energy and improving environment. < /p >
< p > < strong > yarn hairiness automatic on-line monitoring < /strong > < /p >.
< p > Mao Yu will fall off in the process of < a href= "http://www.pmae.cn/news/index_c.asp" > spinning < /a >, which will cause more flying flowers in the workshop, pollute the environment, and even produce cloth defects. Although repeated inspection by ordinary ring spinning frame or winder can also achieve the goal of quality control. However, it is obviously not enough and impossible to control and eliminate harmful hairiness by manual operation alone. Therefore, it is very necessary for spinning equipment to be equipped with automatic on-line monitoring of yarn hairiness. In fact, there are usually on-line monitors on new spinning frames or rotor spinning, which detect abnormal problems in production by means of thermal, acoustic or tension sensors. Some on-line detection instruments are even equipped with microelectronic technology, which has the function of intelligent tracking and analyzing the causes of abnormal problems. It can generate analysis reports on the screen, so that the quality of each spindle or winding head is completely controlled, so as to reduce the H value of the hairiness and control the difference between the platforms. < /p >
< p > for example, the domestic YG172A and YG171B hairline tester is an ideal hairline tester at home. Type YG172A and YG171B hairiness tester is the third generation hairiness tester developed on the basis of YG171A type. Among them, the YG172A type instrument is basically similar to the Japanese DT201 principle, while the YG171B type is similar to that of G565. They can be continuously tested for 1~50 times. They can simultaneously measure the hairiness of 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 7 mm, 10 mm, 12 mm, with data automatic display and printing recording machine, and can automatically generate average, unevenness CV%, hairiness histogram and other data reports. < /p >
< p > at the same time, YG172A type < a href= "http://www.pmae.cn/news/ > > Mao Yu tester < /a > can also automatically test and analyze the length, number and distribution of Mao Yu in yarn. It is very suitable for testing short fiber yarn and warp yarn after sizing. By using the principle of photoelectric conversion, the instrument changes the optical changes caused by hairiness shading into electrical signals, and then generates the hairpin counting pulses by magnifying and shaping. These pulse signals can be processed and converted by computer, and the results can be displayed on the screen. This hairiness tester can obviously improve the weaving efficiency of air-jet looms because it can reflect the distribution of hairiness. < /p >
< p > < strong > Ulster automatic cloth inspection system < /strong > < /p >
< p > in addition to the automatic on-line monitoring instrument for yarn hairiness which has been used in textile enterprises, some textile enterprises have also adopted on-line detection system in weaving workshop. For example, the automatic cloth inspection system introduced by Ulster company has the advantages and characteristics of mastering and identifying all kinds of fabric defects, correctly determining the location of defects, marking automatically and recording defects in storage. < /p >
< p > specifically, the main functions of the automatic cloth inspecting machine are embodied in the following aspects: the normal inspection speed of the automatic cloth inspecting machine is 120 m / min, and the cloth inspection system can check and analyze the local problems of the normal cloth appearance, determine whether it is a defect or not, mark and classify the cloth according to the result of the judgment analysis, and the defect identification device of the automatic cloth inspection system applies the random network technology, and the cloth inspection speed can reach 300 m / min. the processing and recording speed can reach 250 / min. < /p >
< p > generally speaking, the automatic cloth inspection system operates in two main ways. One is the online a href= "http://www.pmae.cn" > the automatic cloth inspection system < /a >, that is, combined with the existing loom; the other is off-line, and the fabric will be transported to the automatic cloth inspecting machine separately for automatic cloth inspection. The two forms have their own advantages and disadvantages: the online automatic cloth inspection system is relatively simple, the floor area is small and the operation cost is low, and the labor force is not occupied. The machine can also take care of the automatic cloth inspection system at the same time. The drawback is that the speed of the loom and the speed of cloth inspection interact with each other, and it is often impossible to bring the speed advantage of the online automatic cloth inspection system into full play. Moreover, on-line automatic cloth inspection system is equipped with automatic cloth inspection mechanism on each loom, which has virtually increased the cost of looms. Although the offline automatic cloth inspection system has the advantage of giving full play to cloth inspection speed, it also has some disadvantages. That is, this system needs additional machine and transmission system. In actual production, it will occupy more labor than the online automatic cloth inspection system. < /p >