Industry insiders warned that the industry is not mature and should not be promoted on a larger scale.
Sun Yanwei
“Our local government recently wanted to install some LED street lights in one or two streets. What is the brightness?†On March 2, Guangzhou Pazhou Exhibition Hall, Mr. Luo from Hunan Hengyang stood in front of the booth of Shenzhen Zhouming. Ask the on-site receptionist about some LED streetlight technology issues.
Mr. Luo, who is full of expectations, may not know that the maturity of domestic LED lighting is not as expected. Last year, the Ministry of Science and Technology began the “10 Cities and Miles†project to trigger the enthusiasm of LED lighting, but this did not solve the technical problems.
"Two days ago, the Guangzhou Science and Technology Bureau revealed that before the Guangzhou Asian Games, the LED street light coverage of Guangzhou Road will reach 40%, adding 140,000 LED street lights. China has become the testing ground for global LED street lights." LED CEO Zhang Xiaofei told the "First Financial Daily" reporter on March 1.
But in fact, Zhang Xiaofei stressed that due to the problems reflected in the “Ten Cities and Ten Thousand Cities†pilot cities last year, it can be said that there is currently no LED street lamp enterprise that has truly “passed through†and comprehensively solved all problems of LED street lamps. Just because LED street light technology is not mature enough, in developed countries such as Europe and the United States, LED street lights are only used in the community, or small-scale pilot projects in the main roads. "So it is not appropriate to add new demonstration cities in the near future, and promote LED street lights on a larger scale. ".
LED street light maturity
“TCL's LED streetlights have pilot projects in Wuhan and Huizhou.†An engineer at TCL Lighting pointed out that the current strategy of high-power LED street lighting for TCL lighting is only tracking and technical reserves, mainly because LED street lighting technology is mature. The degree is not enough. At present, the technical problems of heat dissipation and packaging of LED street lamps have not been completely broken.
"A lot of LED road lighting has reached 30%, which means that after 18 months of use, the brightness of the LED street lamp is only about 60% of the new installation. The heat dissipation problem directly leads to the shortening of the service life from the theoretical value of 100,000 hours to 30,000 hours. â€
However, the technical maturity and quality of LED streetlight products are in sharp contrast with the local government's investment in LED lighting.
According to the idea of ​​the “Ten Cities and Ten Thousand Cities†of the Ministry of Science and Technology at the end of 2008, 10 cities were selected, and each city promoted the application of 10,000 LED lighting. In April last year, the Ministry of Science and Technology identified 21 cities to participate in the pilot project of the “Ten Cities and Ten Thousand Cities†project.
The enthusiasm for LED lighting has risen. Zhang Xiaofei pointed out that many cities applied for demonstration cities last year, regardless of whether there are LED companies in the local area or whether they have basic conditions. The high-tech LED statistics show that a total of 222,000 LED street lights were installed in 21 pilot cities last year.
"It is estimated that at least 400,000 yuan will be added this year." Zhang Xiaofei pointed out that due to the lack of standards and government procurement biased to local enterprises, many immature LED street light products have entered the market. "We investigated 40 LED street light companies in China, and the results show that One-third of the companies started producing LED street lights within a year."
“LED street lights are too dark, and some roads are turned off.†This time has become an open secret in the LED lighting industry. Li Xuliang, chairman of the LED street light leading enterprise Qinshang Optoelectronics Co., Ltd. also revealed that some small manufacturers' products have indeed turned off the lights in the pilot projects in Zhuhai, Dongguan and Shenzhen.
From March to July last year, Shenzhen organized the most complete LED streetlight test to date, and 27 streetlights participated in the test. “There is no standard to say who is a qualified product, but the proportion of good products is not high.†Wu Chunhai, director of the Planning and Design Office of Shenzhen Lighting Environmental Management Center, revealed that compared with traditional street lamps, LED street lights have obvious advantages in small streets, but in cities. There is no advantage at all on the main road. Therefore, the new LED street lights in Shenzhen this year are still locked in 2000ç› to 3000ç›.
After studying the test results in Shenzhen, Zhang Xiaofei pointed out that the test had a total of 1200 hours of lighting, but most of the products had a light decay of more than 10%, which obviously could not meet the goal of 50,000 hours of light decay below 30%. Explain that the technology is not mature enough, at least not for the main road.
LED business
In addition to the immature technology, LED streetlight companies will face the challenge of acquiring new orders and acquiring new orders this year.
Based on the conclusions of the pilot, some local governments also slowed down in the early stage. "This year, Weifang will add 7,000 LED street lights, and previously installed 27,600 baht." Weifang City Street Light Management Office pointed out that the pilot project in Weifang reflected two problems. First, the traditional lighting power supply facilities lag behind LED lighting. In the footsteps, the second is the lack of standards, it is impossible to judge whether the LED street lights are qualified.
The relevant person of Baoding City Street Light Management Office also said that because LED street lights are not up to standard, the main street lights in Baoding City will still be based on sodium lamps, and LED street lights will be used in small streets and communities.
"We are also exploring." Li Xuliang said in a telephone interview with the newspaper yesterday that "the situation this year is still not clear, and there are no new orders."
As of the end of 2009, Qinshang Optoelectronics has installed 150,000 LED street lights covering 35 cities across the country. As a new thing, LED street lights will inevitably lead to a lot of controversy. Although I dare not say that LED street lights are perfect, in order to eliminate the concerns of local governments, the projects received by Qinshang Optoelectronics generally require insurance companies to guarantee a five-year service life. "Of course, not every LED company street lamp product. There are insurance companies willing to guarantee." Li Xuliang said.
In fact, the biggest embarrassment for LED streetlight companies this year should be "no rice."
“There are more than 500 LED streetlight enterprises in the country.†Zhang Xiaofei pointed out that due to the shortage of glutinous rice, the mature LED enterprises adopt the first-package trial in the competition, with the aim of taking the lead in the first place, and the bigger the losses, the bigger the loss. There are still many companies that do not have enough practical experience, and the street lamps that are made are unqualified and cannot be sold; those who make qualified products are also unable to sell because of local protectionism.
Xu Xiaolei, deputy general manager of Guangzhou Jinlai Lighting Co., Ltd., who is doing LED indoor lighting, said that because the LED streetlight industry is too deep, almost no LED streetlight company is making money, so Jinlai Lighting has no plans to enter LED streetlights.
However, the LED street light cake continues to be painted this year.
At the end of last year, Guangdong Province has set up a green industry investment fund, with a total investment of 25 billion yuan in the form of financial investment, to promote the use of LED street lights, and Guangzhou will be replaced with LED street lights within three years. Shenzhen plans to complete the renovation of the main road LED lighting in the city in 2015, requiring the installation of 264,000 baht. Wuhan strives to install 30,000 LED street lights in three years; Chongqing will arrange 240,000 LED street lights in the next five years; Tianjin will invest 1 billion yuan in the next three years to promote the application of 500,000 LED lighting.
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Second, how to use 4G module
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What is the 4G module How does the 4G module work
4G module, also known as 4G transmission module, 4G communication module, 4G LTE module. It is a kind of hardware loaded to the specified frequency band, the software supports the standard LTE protocol, and the software and hardware are highly integrated modular products, with good compatibility, fast communication speed, large amount of communication data, wide network spectrum, communication flexibility and other characteristics, widely used in electric power, environmental protection, finance, industrial automation and other fields.
The working principle of 4G module
It has the characteristics of fast communication speed, wide network spectrum and flexible communication. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions.
Through high-speed networking, the 4G module transmits all terminal business data and equipment operating status to the business center in real time. Through the management monitoring platform, the terminal equipment operating status can be monitored in real time and equipment faults can be timely checked. The efficiency has been greatly improved in many aspects such as operating cost, operation scale and service timeliness. Suitable for shared massage chair, public charging pile, vending machine, vehicle system, environmental monitoring, power remote monitoring and other industries.
4G module refers to a product whose hardware is loaded to the specified frequency band, software supports the standard LTE protocol, and software and hardware are highly integrated and modular. It has the characteristics of fast communication speed, wide network spectrum and flexible communication. The hardware integrates radio frequency and baseband on a small PCB board to complete wireless receiving, transmitting and baseband signal processing functions. The software supports voice dialing, SMS sending and receiving, dial-up networking and other functions. Through high-speed networking, the 4G module transmits all terminal business data and equipment operating status to the business center in real time. Through the management monitoring platform, the terminal equipment operating status can be monitored in real time and equipment faults can be timely checked. The efficiency has been greatly improved in many aspects such as operating cost, operation scale and service timeliness.
Good compatibility
4G module supports FDD LTE/TD-LTE two LTE standards, can also be backward compatible with 2G/3G, support LTE-FDD, LET-TDD, WCDMA, TD-SCDMA, CDMA, GSM and other bands.
Large amount of communication data
4G module downstream rate can reach up to 150Mbps, uplink rate can reach up to 50Mbps, to provide customers with high-speed Internet access and wireless data connection and other functions, suitable for large data transmission applications, such as: remote video surveillance.
High communication speed
The 4G module has a lower ping value than the 2G/3G module, and it takes less time for the module to send data packets to receive the response from the server, which is suitable for applications requiring high response speed, such as remote alarm.
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