Ye Guanrong: Lighting detection technology is the guarantee of orderly development
As we all know, China is the world's largest lighting production country, but it is not a lighting technology powerhouse. At present, there are still many technologies in the hands of foreign lighting giants. The development of lighting technology also involves the advancement of lighting detection technology. With the rapid development of the lighting industry, China's lighting detection technology is in line with the rapid development of China's lighting technology, how to keep up with the international level, and further promote the development of lighting technology? When will the relevant lighting standards be introduced? How to do the lighting inspection work? As the professional portal of the lighting industry, the author interviewed Director Ye Guanrong of the Visualization and Color Professional Committee of the China Lighting Society on the topic of the industry's most concerned.
Ye Guanrong, Director of the Color Committee of the China Optics Association, Chairman of the Zhejiang Lighting Society, and Professor of Zhejiang University, has long been engaged in the research of optoelectronic technology, photometry, colorimetry, optical radiation measurement and calibration technology.
Author: Please introduce the progress of China's current lighting detection technology?
Ye Guanrong: At present, China's lighting detection technology has been developed to a certain extent, ranging from photometers, illuminance meters, to luminosity distribution meters, etc., Chinese people can make their own. And with the advancement of lighting detection technology, the corresponding testing standards have been continuously improved. Like the LED lighting inspection standard to be introduced, it has formed a system that is no longer a simple standard, and has corresponding standards from LED devices to LED technology and specific applications.
Author: How to do scientific lighting inspection and improve the precision of testing instruments?
Ye Guanrong: First of all, we must do a good job of standard delivery. Standards from the government to the local, local to local, and the transmission of testing units must be in place, to be unified, can not establish a set of testing methods. Secondly, the lighting inspection technology should be connected with the international lighting inspection technology, and the testing standards should also be consistent with the international standards. The main test system should adopt international advanced means and should be close to the international advanced level in terms of test methods. In addition, because the precision of some precision testing instruments such as detectors manufactured by China has not reached a certain standard, foreign imports can be considered at the current stage to ensure the uniformity of instrument accuracy.
Author: What are the advantages and disadvantages of China's lighting detection technology compared with the international?
Ye Guanrong: The main advantage is that the lighting detection instruments made by China are relatively cheap. China's lighting detection technology has been developed to a certain level, and some of the self-manufactured lighting inspection instruments such as photometers and illuminance meters are also exported to foreign countries and are very popular. However, due to the current limited technology, many testing instruments are still in the research and development stage, and some precision testing instruments still need to be imported from abroad.
Author: Will the national standard for LED lighting be introduced this year? Will the establishment of China's LED lighting standards promote the development of the LED lighting industry?
Ye Guanrong: The LED standard is a complete system, and some standards will be introduced one after another this year. The establishment of LED lighting standards will definitely promote the development of the LED lighting industry. Without testing, many inspections will not work. Only by following the standards can we do all kinds of testing work, and the whole industry can develop in an orderly manner.
Author: China's “Ten Cities and Ten Thousand Miles†activities are underway. From the perspective of testing, what kind of complete and better testing methods and systems can choose the right products for the government?
Ye Guanrong: First of all, the standardization of relevant standards is convenient for lighting detection. In the "Ten Cities and Ten Thousand Miles", there is a certain standard for how to evaluate street lamps. In order to better detect the lighting products, we have revised the drafted plan several times, without certain industry standards, and can not accurately and scientifically measure the products.
Second is the standard for testing instruments. The standard for the accuracy of the test instrument needs to be established by the relevant metrology department. Finally, the product standard, whether it is performance, test methods and safety standards, must reach a certain standard level.
The cat7 Lan Cable are an eight-core Shield wire. Each pair has a Shield layer (commonly called a Foil Shield), and then a Shield layer (commonly called a Braided screen Shield) outside the eight cores, with the same connection as the RJ-45.The highest transmission frequency of the CAT7 Ethernet Cable S/FTP is 600MHz, and the transmission frequency of the CAT7 Network Cable is 1000MHz.
There are a number of significant differences between the six and seven cabling systems, the most obvious of which is bandwidth.The CAT6 cable of channels provide a comprehensive attenuation to crosspoint ratio of at least 200MHZ and an overall bandwidth of 250MHZ. CAT7 of systems can provide at least 500MHZ of comprehensive attenuation to crosspoking ratio and 600MHZ of overall bandwidth.
The proliferation of broadband applications has created a need for more bandwidth.For example, a typical CAT7 channel can provide a bandwidth of 862MHZ for the transmission of video signals, analog audio signals on another pair, and high-speed LAN information on a third or fourth pair.
Another difference between the CAT6 patch cable and cat7 patch cable systems is their structure.The six types of wiring systems can use either UTP or STP.The seven types of systems are based only on shielded cables.In the cat7 network cables, each pair has a shield layer, and four pairs of wires together have a common shield layer.In terms of physical structure, the additional shielding layer makes the CAT7 Ethernet Cable have a larger diameter.
Another important difference is its ability to connect hardware. The parameters of the cat7 patch cable of systems require that all pairs of wires provide at least 60DB of integrated proximal winding at 600MHZ.The cat6 systems only require 43dB at 100MHZ and 46dB at 250MHZ for the cat6 patch cable.
Cat 7 Ethernet Cord,Cat7 Lan Cable,Cat 7 Ethernet Cable,Cat 7 Network Card
Shenzhen Kingwire Electronics Co., Ltd. , https://www.kingwires.com