Infrared camera promotes hot or development "second spring"
SHENZHEN YGHQ Optoelectronics Co.,ltd. , https://www.leds-smd.com
Most of the industry’s insiders welcomed the entry of international companies. Cheng Tianyu, General Product Department of Tianjin Tiandi Weiye Digital Technology Co., Ltd. believes that the participation of international giants will inevitably inject a potent to the infrared camera market. From another perspective, you can also see: International brands have also begun to pay attention to the infrared camera surveillance market, and increased the investment in infrared camera design and development. Liu Jiandong, R&D director of Shenzhen Ubuntu Technology Co., Ltd., also stated that the participation of foreign brands has demonstrated that infrared products have been accepted by the entire security industry, and may further stimulate the development of infrared technology, bringing more vitality to the field of infrared cameras.
"Red" leads half of the sky to the front-end monitoring market In order to meet the demand for all-weather monitoring, as early as 2001 to 2003, Chinese manufacturers began to explore infrared camera technology. From the early camera and IR panel module to the integrated design of the camera and infrared light; from the LED infrared light manual mode to the automatic control of the photoresistor, and then to the camera dual filter introduction and application; from the most basic video Surveillance requires the emergence of a wide range of functional requirements such as water and riot protection, light suppression, face recognition, and privacy screening, all of which have witnessed the rapid development of the infrared camera technology and market in China. After 2006, with more and more manufacturers influencing this field, the infrared camera market has gradually formed a situation in which supply exceeds demand, and the competition among manufacturers has become more intense. In the age of the security industry, infrared cameras have the same time stamp as other security products. Objectively speaking, the proliferation of manual workshops and the lack of industry standards have to some extent restricted the development of the infrared camera market.
Infrared cameras can obtain clearer shots in the zero-illuminance environment at night, and at the same time, they have great concealment, which has won widespread market acceptance and market share is gradually expanding. According to Cheng Yuewei of Tiandi Weiye, infrared cameras have occupied 60% of the front-end camera market in 2010. At present, the prices of international big brands and domestic products have a gap of around 30%, while domestic brands such as Hikvision, Dahua, Tiandiweiye, Jingyang, and Xienbi, Sony, and Samsung are active in the Chinese market. All have years of experience in the design and development of security products, infrared products also occupy a relatively large share in the domestic market.
Application "More flowers"
Infrared cameras are developing and growing at lightning speed, and the types of products are constantly diversifying, and the application fields are being further expanded.
According to Qiu Hongbin, technical director of the Guangzhou Sales Headquarters of Tianjin Samsung Electronics Co., Ltd., according to the division of infrared light sources, there are LED infrared cameras, halogen infrared cameras, LED array infrared cameras, laser infrared cameras and other models. Among them, LED infrared cameras are generally suitable for medium and short distances of 10 to 100 meters, and have the highest market share. However, there is a problem of non-uniform illumination. The LED infrared cameras are mainly suitable for use in corridors, halls, warehouses and other interior and exterior areas of buildings, community perimeters, roads, etc. Distance monitoring; halogen infrared camera due to large power and filter light and heat conversion, so the heat problem is particularly serious, high maintenance costs, short life, and red storm phenomenon is particularly serious, more suitable for 100 to 200 meters in the long-distance monitoring applications LED array infrared camera is basically the same as the LED infrared camera. The original half-power angle of the LED array light emitter can reach more than 100°. The existing manufacturer's products can reach about 150°, so the light is more uniform, but the outdoor environment infrared Penetration is not as good as the LED infrared camera. In addition, the integrated heat dissipation of the light source is also a major problem to solve. It is more suitable for indoor and short-distance monitoring applications such as interior and exterior of buildings, warehouses, etc., in the perimeter of the community, roads, etc.; and the laser infrared camera irradiation distance. The maximum distance is generally 300 to 500 meters. Due to energy concentration, the angle is not close enough. Using current costs are still high. It is more suitable for the monitoring of forest fire prevention, oil fields, railways, water conservancy, scenic spots, military, aquaculture, ports, and peace markets. With the further reduction of costs, it has been applied to many areas that require night vision surveillance including the community. . Therefore, infrared cameras need to determine the type of camera according to the specific use environment, especially the night environment.
The potential remains to be tapped In recent years, as the demand for day and night surveillance applications has been continuously improved in various industries, users have become increasingly demanding for the specialization of infrared cameras. Therefore, the stability and reliability of infrared cameras are also affected by the production enterprises. attention. According to Zhan Xueyu, product manager of Digital China Security Division, “At present, the technical breakthroughs of infrared cameras are mainly to solve the problems of heat dissipation, radiation distance and close-range exposure, and the associated volume, infrared lamp luminous efficiency, and clarity. Problems such as multi-functionalization must also be correspondingly improved."
Thermal effects Since infrared cameras have the outstanding advantages of night vision, concealment, and price, they have been favored by users. However, infrared cameras have a common problem - they have a short service life, which in turn allows engineers to love and hate.
Yu Shiping of Shenzhen Jindi Building Engineering Co., Ltd. stated that as an engineering company, the stability of its performance is most concerned with infrared cameras. Since some of the electric energy consumed by infrared lamp lamps is converted into effective light energy, the other part is converted into heat energy. When too much heat is generated and no proper cooling measures are taken, the internal temperature rise will be too high, which will lead to excessive aging of the lamp and a rapid decrease in the irradiation distance. In particular, some manufacturers, lack of healthy business philosophy, one-sided pursuit of performance at the time of delivery, ignoring the life of the product, in the absence of solving the problem of fever and excessive temperature rise, desperately seeking brightness and distance, will make its life Rapid decline.
In this regard, Hikvision product manager Guo Hangbiao said that infrared camera manufacturers have also been working hard to improve camera life by improving structural design, using high-quality materials and optimizing circuit design. For example, the camera and the infrared lamp adopt the separate bin design, which completely isolates the infrared lamp from the movement, which can effectively solve the heat dissipation problem. The aluminum substrate design adopts the imported thermal conduction point and the large-area conduction heat dissipation to maintain the working temperature of the infrared lamp at 50 degrees. Air-cooled system is set to control the exchange of hot and cold air in the warehouse through temperature control switch, so that the internal environment temperature is even; establish LED circuit protection system: each group of infrared lamps is powered independently to avoid the vicious cycle of current, even if the single lamp is not damaged. It will cause the failure of all lights; multiple designs ensure the lifespan of single-tube infrared lamps.
In terms of heat dissipation, Digital China (An Peng) has its own understanding. According to the company's Zhan Xueyu introduction, China Digital (Ampang) infrared camera uses heat sink metal aluminum film will be connected with a large area of ​​the shell, in order to ensure the adhesion of the connection, in the junction are covered with a thermal silica, can To ensure the heat transfer effect, the heat is quickly exported to heat dissipation, and it is also waterproof and dustproof. In conjunction with the current conversion technology, the camera itself generates less heat. Its DCS-R430 model uses a gear structure in the camera structure design, which expands the heat dissipation area, accelerates the heat diffusion, and effectively improves the heat dissipation efficiency. In addition, for the special environment of outdoor monitoring, the effect of heat insulation plate is used to avoid sudden temperature rise in the sun exposure body. Through the above unique heat dissipation design, the service life of infrared lamps and cameras is greatly improved, and low carbon and energy saving are also achieved. Effect.
While Suntech's infrared camera design uses a unique cooling process, it will make the infrared camera shell multi-slot structure to significantly enhance the heat dissipation surface, also using Philips brand of high-efficiency infrared light, not only extend the life of the camera, Also ruled out the use of white video after one year of use.
Although Xienbi, Hikvision, and other brands have promised for three years, the infrared products sold in 2007 are still sticking to their monitoring positions. This indicates that as long as the products are carefully designed and manufactured, the use of infrared cameras is greatly improved. Lifespan is achievable.
At the moment of illumination, most LED infrared lamps have a far-reaching effective infrared distance of about 100 meters (some cameras with infrared arrays can reach 120-150 meters). The infrared effect is attenuated with increasing distance and angle. Some remote monitoring is difficult to achieve, which makes infrared cameras can only develop in the short-distance monitoring field. For this short board, Bosch launched an infrared camera for long-range, day and night, pan-tilt-zoom (PTZ) surveillance. The infrared camera is equipped with a telephoto lens with infrared correction function, optical zoom up to 60 times, and can be used with a high-performance DinionXF image sensor to provide 1000 meters of recognition level performance and 1200 meters in a dark environment. Class-class performance provides 24/7 long-range imaging for critical applications such as port and maritime surveillance, traffic and airport surveillance, and perimeter and perimeter security.
Some manufacturers choose to work on cameras and lenses, and some focus on infrared light sources. The appearance of laser infrared lamps has created another space for night vision surveillance.
The laser infrared lamp adopts LD (laser diode) as a light emitting component, and the photoelectric conversion efficiency is over 60%. The luminous efficiency is high, and the heat generation is very small. The life of the laser infrared lamp can reach 16000 hours without light decay. According to Lei Gang, product manager of Xi'an Ouyi Optoelectronics Technology Co., Ltd., the luminous power of a single-core semiconductor laser tube can easily reach 10 W. The brightness of a laser tube is equal to the sum of the brightness of several hundred LEDs. The laser is very easy to control its divergence angle, so the laser can completely solve the shortcomings of the existing products with short illumination distance, and the illumination distance can easily achieve the illumination distance from 30 meters to 500 meters. Therefore, the real need to achieve long-range monitoring, select the laser infrared light is a better choice.
In addition to laser technology, some manufacturers are also trying to integrate infrared technology and micro-light technology, which is also one of the future direction of development. Bai Yukun, technical manager of Beijing Xinzhiheng Technology Co., Ltd., stated that in the period of continuous improvement of both low-light and infrared technologies, taking into consideration the complementarity between the two, how to add low-light images without increasing the difficulty of existing technologies Fusion with infrared images to obtain better observations is a good research topic.
Near-exposure exposure Many construction companies report that infrared cameras often have a “flashlight effect†in practical applications: the brightness of an area illuminated by infrared light is very high, and a very large contrast with the area not exposed to the surrounding area leads to monitoring. The effect is not ideal. According to Qiu Hongbin of Samsung Tyco, Samsung’s four infrared cameras introduced this year employ two sets of infrared light modules of different sizes inside and outside, and the zooming linkage infrared light grouping start mechanism makes the double-layer infrared light board illuminate. More evenly.
In addition, according to the special application environment of infrared cameras, some manufacturers have also adopted a series of humanized functional designs to effectively solve the many problems faced by users during their use. When the infrared light reaches the camera's sun shield, it will be reflected back to the lens or direct light leaks into the lens. White fog will appear. Digital China's DCS-R430 model uses a unique dual glass module design to solve the white fog, halo and other issues. In addition, since the gun-type infrared cameras are widely used outdoors, the protective cover needs to have good rainwater resistance. The DCS-R430 model adopts a waterproof pad design at the interface of the aluminum alloy shell, which improves the precision at the interface and achieves comparison. Good anti-rain effect.
Following the trend of the industry as a monitoring front-end device, the development of infrared cameras can not bypass the eternal theme of security monitoring: high-definition, intelligent, networked, and Sony SNC-DH180 HD network dome camera is a better interpretation of it . The infrared camera uses Sony's latest "Exmor" COMS image sensor, with a variety of state-of-the-art image enhancement technologies such as View-DR, Visibility Enhancer and XDNR, to ensure high-definition HD (720/25 frames) real-time images. This camera also supports H. 264, MPEG-4 and JPEG compression and dual stream function, and has excellent sensitivity performance. In addition, it also uses the latest DEPAAdvanced intelligent monitoring technology, and has two-way audio, audio detection and language alarm functions, built-in infrared light also has a day and night conversion function, even in poor light or even black out of the environment can output a clear image .
In this respect, Xienbi also has a similar exploration. Its newly launched W series outdoor infrared cameras use Xiebi's unique intelligent infrared technology: By enhancing the infrared sensitivity function of close-range objects, it avoids the white-light phenomenon that traditional infrared cameras use in irradiating objects. Under various low illumination conditions (minimum illumination of 0.00 Lux in case of infrared light on), it can also provide sharp and saturated video images. In addition, this technology can automatically adjust the infrared lamp power consumption according to the target distance to automatically adjust The intensity of the infrared light provides a longer infrared lamp life.
Conclusion According to the current situation, the future development of infrared cameras will be excellent. However, manufacturers must not forget the stability of the product when the technology and the market move forward. As Yu Shiping of the Jindi building puts it, in the context of increasing user demand, it is of course important to have a multi-functional product, but only high-reliability monitoring products can gain greater market share. This may also be indicative of many engineering companies. And end-user voices.