Radio frequency telecontrol system and method

Abstract

The invention provides an RF remote control system, including a transmitting terminal and a receiving terminal, wherein the transmitting terminal includes a command input interface, a command coding circuit, a modulation circuit and a transmitting circuit. The command input interface is used for receiving the user' command, the command coding circuit is used for coding the received command to generate a command coding signal, the modulation circuit modulates the command coding signal to transmit outside through the transmitting circuit; the receiving terminal includes a signal receiving device, a modulation circuit, a command decoding circuit and a main processor, wherein the remote control receiving device is used for receiving the modulated command coding signals, the modulation circuit is used for demodulating the modulated command coding signals, to obtain the command coding signals to transmit to the command decoding circuit. The command decoder is used for decoding the command coding signals, and finally transmits the decoded command signal to the main processor. The transmitting circuit is an RF transmitting circuit; the command coding circuit is used for coding the received command according to the promise of the transmitting terminal and the receiving terminal, and the command decoder is used for decoding the command coding signals according to the promise. The RF remote control system and the method effectively solves the a plurality of defect such as the limited infrared remote control transmission distance and angle, and the impassable obstacles, provides a remote control method with long transmission distance, reliability and passing through the obstacles.

Description

technical field [0001] The present invention relates to a remote control system and method, more specifically to a radio frequency remote control system and method. Background technique [0002] Remote control technology, also known as remote control technology, refers to the realization of remote control of the controlled target, and is widely used in the fields of industrial control, aerospace, and home appliances. The application of remote control technology in household appliances is even more extensive. In many families, there are even more than three remote controls placed on the tea table. According to reports, last year alone, the global shipment of remote controls reached 600 million units. . Not only that, before 2010, this figure will continue to grow at an annual rate of 7%. [0003] Remote controls have traditionally been viewed as an accessory, but with the convergence of media in the digital living room, they are becoming an increasingly important part of co...

AI Technical Summary

Problems solved by technology

Although some manufacturers' chipsets can design high-quality infrared receivers, the infrared links are all one-way links, and do not have error detection and error correction capabilities

Some of the energy radiated from plasma TVs is also in the electromagnetic spectrum of infrared rays, so it may become a source of interference and affect the communication between the remote control and the host

Compact fluorescent lamps (CFLs) can also interfere with IR signals, and are likely to have even greater effects in the not-too-distant future

Not only that, but while the latest remotes and receivers have filters to reduce them from noisy signals from nearby devices, the IR link is still not reliable enough

[0005] In short, infrared does not provide a reliable connection

In addition, the remote control distance of the infrared remote control is relatively short, generally only 8-10 meters away, and the infrared remote control has very obvious directionality, and its remote control angle is generally between 30-40 degrees, and it cannot pass through obstacles. caused some inconvenience

Moreover, the infrared rays may be interfered by other lights (such as lights), and the reliability is not high

Under normal circumstances, infrared remote control can only be applied to a room or a similar small area. If the user stays in the bedroom and wants to turn off or turn on the audio equipment in the living room, he needs to go to the living room to operate, which is to a large extent Limits the role of infrared remote control

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