In today's era of economic globalization and the explosion of information, people's daily work and life needs for the display of various information are increasing, and the requirements for the display of information are also becoming more and more diverse. This greatly promotes the application of large-screen video wall. Simply put, the large-screen video wall is an integrated display system, and the two most commonly used types are projection and LED. Among them, three technologies commonly used in projection are LCD, DLP and LCOS. The price of splicing wall using projection technology is relatively low, and the quality and stability of the picture are relatively high, so the cost performance is the highest, and it is the mainstream product in the field of splicing wall. Although the price of LED splicing wall is relatively high, it is widely used for digital display outdoors because of its characteristics of resistance to sunlight and wind and rain. In addition, there are LCD liquid crystal and PDP plasma technology. Mr. Zhao Handing, Secretary General of the Large Screen Projection Branch of the China Electronics Video Industry Association, said, "The splicing wall is not optional, but it can greatly improve work efficiency. For example, in the public transportation dispatching department, using the splicing wall can display at the same time. Many pictures make it clear at a glance the traffic conditions of each road section, which is convenient for command and dispatch. "It can be seen that the splicing wall is playing an important role in large departments and places such as command and dispatch. At present, the large-screen splicing system has been widely used in exhibition halls, sports venues, news centers, television studios, meteorological stations, train stations, airports, entertainment plazas, military operations command centers, traffic command systems, public security 110 command systems, power dispatching, Flood control dispatch, shopping malls, banks, outdoor advertising, etc. Due to the different circumstances in each industry, the application methods have their own characteristics. In addition, different types of splicing walls also have different advantages, and also have their own specific needs environment. Therefore, the application development is accompanied by the product development, and the future development of the splicing wall is closely related to the application. Large-screen splicing diversified development Various types of splicing walls are contested by different technologies. It can be seen that the LCD splicing wall will become the mainstream in the future in terms of small-scale monitoring, and DLP is still the future development direction in terms of large-scale. Although DLP rear projection splicing walls have defects such as large size and short life, they still occupy the current main market due to their advantages such as small joints and good visual effects. In addition, DLP has been developed for a long time, and the promotion range is relatively large. Although some shortcomings are exposed in the process of large-scale use, DLP manufacturers are gradually improving their technology, trying to make the DLP cabinet larger and thinner, and at the same time make the seam Smaller to achieve picture integration. DLP occupies half of the country, and LCD is a rising star. The display unit of the splicing system can be divided into many types according to its working principle, the more common ones are: CRT (cathode ray tube), LCD (liquid crystal), PDP (plasma), DLP (rear projection) and so on. Looking at the current situation of the display unit, CRT has gone from the red pole to the end, and it has long become a yellow flower; DLP rear projection splicing system is currently the mainstream product, occupying most of the country; the LCD, which is a rising star, has developed rapidly in recent years. With the development of technology and the increase in demand, CRT has long been unable to meet the needs of users, and has basically withdrawn from the market. DLP has the characteristics of image clarity, brightness, color, and viewing angle, and it is still the most widely used technology in the market. In addition, since the DLP splicing curtain wall uses a projection method, its splicing gap can be made small (3-5mm), but due to the unevenness of its brightness, the brightness of the entire picture is lower at the splicing edge, and each unit The brightness of the central part is higher, so to a certain extent, it also affects the look and feel of the spliced ​​curtain wall. The LCD splicing curtain wall adopts the LCD screen as the splicing unit, which is a curtain wall technology following the CRT curtain wall, DLP curtain wall, and PDP curtain wall. It has a service life of up to 50,000 to 80,000 hours, with stable quality and low maintenance cost. There are no very strict requirements for splicing, LCD can be regarded as the most cost-effective curtain wall. Judging from the current domestic and international usage, all high-end curtain wall systems have adopted LCD splicing curtain walls. As the technology further matures, the future market of LCD curtain walls is very promising. In the future, the splicing wall will also be networked, and its functions will be further enhanced. It can not only display the terminal, but also add some practical functions to achieve added value. The most important thing is to achieve consumerization of the family. Large screen stitching is more complete and perfect A perfect picture will always give people an extraordinary vision. At present, no matter whether it is a large-scale rear projection large-screen splicing or LCD splicing system, the gap between the screens cannot always satisfy people. At present, the vast majority of large-scale rear projection splicing display systems are seam splicing, and there is no real seamless splicing system. In addition, there are few manufacturers that can achieve multiple columns and rows; so how to achieve real meaning The seamless splicing of the large-scale rear projection splicing display system on the above, and making the spliced ​​system picture more complete and more perfect is still the pursuit of excellence by manufacturers. At present, a seamless edge splicing display technology is gradually becoming a solution to this pursuit. It is reported that the entire screen is used in fusion splicing, which eliminates the physical gap between the screens in the traditional splicing, so that the entire image displayed on the screen remains intact. As the large-screen splicing wall is more widely used, the splicing technology is constantly improving, but due to the insufficient PCI bus bandwidth, it has become a key problem that plagues the entire large-screen splicing system in the direction of large-scale development. Take the system of 81 display units as an example to analyze the bottleneck of the PCI bus bandwidth: After calculation, the time it takes to transfer and display a frame of image (243M data) from the memory through PCI under ideal conditions is 1.84 seconds, while the actual runtime Factors such as the impact of other software, device interruption, hard disk access speed, and the amount of memory often greatly increase the image data transmission time, or make the image data transmission have an intolerable jitter effect. It can be seen that due to the limitation of the PCI bus bandwidth, the traditional processor simply cannot complete the ability to normally drive 81 display screens. Embedded splicing method is the general trend At present, there are basically three different splicing methods for large-screen splicing walls on the market: one is PCI plug-in card type; the other is external drag splicing controller method; the third is embedded. The working principle of PCI plug-in card is to use an industrial computer to use a multi-screen splicing card to divide a complete video image into MN sub-video signals, and then transmit these sub-video signals to the corresponding units on the splicing curtain wall. To achieve the purpose of large screen display. However, due to the limited computing power of the industrial control computer, at present, the best-performing industrial control computer can only achieve 44 splicing, which limits the number of splicing units. The external drag splicing controller can also be called a large screen splicer, TV wall controller or video wall splicer. Its main function is to divide a complete image signal into N blocks and assign it to N video display units (such as rear projection) Unit), complete a large screen with multiple ordinary video units. It can support the simultaneous access of multiple video devices to meet the functional requirements of the splicing curtain wall. The reason why it is called an external drag is because this type of splicing curtain wall is divided into two independent parts, one part is the display part, which can be composed of a common rear projection unit such as a rear projection TV; the other part is this splicing controller, Its function is to realize the combination of multiple physical outputs into a superimposed resolution display output, so that the screen displays a picture. This kind of splicing controller has different implementation methods. It can be embedded, plug-in, or both. Simply put, it is like a picture splitter, but it is only enlarged and divided, so it is generally easy to install, the wiring is relatively simple, and there are not many advantages such as modular equipment; but the disadvantages are also obvious, such as once It is difficult to overhaul when a fault occurs on a certain path; it is difficult to adjust the hue, line phase, etc. between each unit, and the image quality is poor. The working principle of the embedded splicing curtain wall is that each splicing unit has an independent video processing module, and the complete signal is sent to each unit through the matrix, and each performs video processing, segmenting the part that should be displayed, and amplifying this part of the signal After the display, to achieve the purpose of large screen splicing display. Since they are processed separately, the number of spliced ​​units can theoretically be infinite. Therefore, the basic difference between PCI card splicing and embedded splicing is that after the former divides the mother signal, each sub-signal must be amplified, while the latter only amplifies the part that should be displayed. Therefore, the former ’s The amount of calculation is large, the resolution is determined by the computer and the corresponding PCI card; the latter is small, and the resolution is determined by its own embedded processing module. In addition, the characteristics of embedded splicing include: Easy to use: Because its software is specifically developed for products, users can generally use it without training. The system has high stability: it will not be interfered by various viruses and the like from the network or computer system, because its software is solidified in FLASH and cannot be changed. The system starts quickly: Non-embedded systems generally have to be built on Unix or WINDOWS to realize its functions. In this way, the system must start these before running the splicing program. The whole machine starts much slower. Low cost: software for embedded systems must be developed by yourself, non-embedded systems require the purchase of operating systems such as WINDOWS, which are expensive Small size and compact structure: It is precisely because of the above advantages of embedded splicing, so although the current application in the market is still based on the more traditional PCI plug-in splicing, there are more producers in this area, but the future will still be Towards embedded splicing. In response to this problem, some manufacturers have proposed some solutions: Distributed master-slave processor structure technology The system with distributed master-slave processor technology has full-screen high-resolution single logical screen display capability, and has the function of multi-user flexible partition application. Whether it is a single logical screen application or partition application, it can achieve fast synchronized display . The current rear projection splicing display system using this technology has a maximum resolution of more than 100M pixels (100 million pixels), and the display speed is equivalent to the display speed of an ordinary 16-channel multi-screen processor system. Advanced Vacuum Dough Kneading Technology
Vacuum Dough Kneader/Vacuum Kneader:
This machine developed by our company is the most advanced domestic kneading machine. It is mainly applicable for making various flour products. Its mixing leaves can be adjusted according to the characteristic of wheat flour. Many mixing leaves developed by our company have been granted the national patents. This vacuum kneading machine is under the vacuum condition imitating the manually kneading to quickly form the gluten and proportionate the protein structure. The kneaded dough has better extension and elasticity, more smooth surface, and better looking than any others.
Flour Mixer,Mixing Machine For Baking,Flour Mixing Machine,Bread Dough Mixer,Vacuum Dough Kneader,Vacuum Kneader Helper Machinery Group Co., Ltd. , https://www.helpermeatmachine.com