Commonly known as WiFi wireless broadband, full name of Wireless Fidelity. Its biggest advantage is the high transmission speed, effective long distance, compatibility with the advanced nature of international communication. The IEEE ([U.S.] Institute of Electrical and Electronics Engineers) 802.11b wireless network specification is a variant of an IEEE 802.11 network specification, the maximum bandwidth of 11 Mbit / s, the signal is weak or noisy, the bandwidth adjusted to 5.5Mbit / s, 2Mbit / s and 1Mbit / s, automatic bandwidth adjustment, effectively protect the stability and reliability of the network. Its main features are: high speed and high reliability.
2.4GHz ISM band for most countries in the world so common that 802.11b has been the most widely used. In 1999 the industry set up a WiFi Alliance, production and equipment to address compatibility issues in line with the 802.11 standard products. WiFi 802.11 wireless network for the development of the organization.
A new generation of wireless networks will not need wiring and the use of relative freedom, to establish a new experience for people wireless LAN. Demand determines the development of the market, which rarely seen IT technology or product as it can have such kind of rapid growth, without any constraints internet access is no longer a dream, which, WiFi has played a vital role. Represents WiFi "wireless fidelity", refers to a full compatibility 802.11 standard IEEE802.11b subset, it uses an open 2.4GHz direct sequence spread spectrum, the maximum data transfer rate of 11Mbit / s, in accordance with the signal strength may also be the transmission rate was adjusted to 5.5Mbit / s, 2Mbit / s and 1Mbit / s bandwidth. A straight line without having to transport a maximum range of 300 meters outdoors, maximum 100 meters at the indoor-impaired, is a transport protocol now used the most.
In the family central control industry, the current market most of the communication between the central control system with wireless touch screen uses most of RFID radio frequency technology, but with the advancement of science and technology limitations of RFID technology in the field of central control has become increasingly evident .
In modern skyscrapers halls and auditoriums, the RF signal is blocked more reinforced concrete structure, when a project needs to use a touch screen to control a plurality of devices within the room, they often need to install a number of RF wireless receiver is to achieve good control effect.
In practical engineering applications, wireless WiFi technology touch-screen control because the distance, in very many large exhibition halls and walls of the installation can greatly reduce the number of radio receivers, even more than the general control distance control, we can also be expanded by installing the radio repeater enhanced manner acceptable range of the receiver, a medium-enhanced wireless repeater can originally control the distance of 100 meters to 500 meters or 1 km, with the transmission power and enhanced WiFi wireless touch-screen enhanced not only control the distance, is more enhanced penetration in the building of reinforced concrete structure, the more fluid movement control.
ITAV newly introduced ITVF85 touch screen, built 54Mbit / s wireless WiFi module, and the maximum transmission distance of 300 meters, much higher than the prior touch screen RFID radio 80 meters. Its high-resolution display portion 16: 9 widescreen display, 265K true color TFT display, 7.5-inch screen at a resolution of 800 × 480 pixels, the touch screen relative to the primary color reduction products on the market more realistic visual effects better. Meanwhile supplied, the English interface editing software, support 3D / 2D button, video, graphics, images, animation and other interface elements. ITVF85 can make a variety of colorful interface and animation effects, others usually only on the cable screen can do, such as progress bars, analog real-time display, real-time display of string functions can easily be implemented on ITVF85. Users can design user-friendly touch screen interface by editing software.
The current mainstream touch-way RFID technology can not meet rising user's technical requirements. ITAV control products used on the WiFi technology, not only broke through the limitations of RFID technology in the communication distance, communication stability, but also increased the general RFID touch screen control can not do two-way communication, ITAV new generation of control host 4 Road E-bUS bus interface, via E-bUS bus supports WiFi wireless control, seamless two-way communication with ITVF85 touch screen, two-way data exchange. This allows real-time to see more and more like the real feedback on the touch screen. Such as remote control device is turned off when the operating state. Take, for example, used the projector's friends all know bulb projector are consumables, with the growth of working hours, bad working conditions, the brightness of the lamp will slowly dim, many models of projectors available in the market support reading lamp usage time and the work function of temperature, that is, as long as the projector manufacturers disclose this part of the protocol, we can visually see the current projector lamp working time and work through two-way wireless WiFi touch screen temperature, use of equipment maintenance and repair and control life has a great help.
Through a wireless two-way control system support, ITAV matrix information unique feedback visually displayed on a control panel and a touch screen, when a signal access, on the touch screen can be directly fed the origin of the signal, so that the control system it will be more convenient and reliable. WiFi wireless technology using two-way benefits More than that, with the E-BUS bus ITPBII-PRO-E and ITVF85 WiFi wireless touch screen combination provides a stable two-line cordless control, giving users unprecedented control experience.
The main advantage lies in WiFi does not require wiring, wiring unrestricted conditions, and therefore is ideal for mobile users, and has broad market prospects. Currently, it has more industry to expand from the traditional health care, inventory control and management services and other special industries away, and even began to enter the field of family and educational institutions.
Health and safety is also a major highlight of WiFi. IEEE802.11 transmit power requirements can not exceed 100 mW, the actual transmission power of about 60 to 70 mW, which is what kind of concept? Between the phone's transmitting power of about 200 milliwatts to 1 watt, hand-held walkie-talkie up to 5 watts, and use the wireless network is not as direct phone contact with the human body, it is absolutely safe. Embedded smart home technology training only contact Guo QQ754634522 Shenzhen - Guangzhou - Zhengzhou
Advantage of WiFi-based, we can see some well-known international brands such as: AMX, CREASTRON have launched a series of WiFi wireless control products in the past two years. However, domestic manufacturers still has yet to apply WiFi technology. ITAV It is in a market-oriented principle, relying on a strong professional development efforts, China has launched the first completely independent intellectual property rights in WiFi wireless control products, but also introduced a more superior performance accessory products.