Research On Wireless Remote Control Device Of Telephone

The intelligent system of family began to emerge in the late 1970s. Since the mid-1980s, all kinds of family control system came into being. The main functions of family intelligent control system are family security alarm, telephone remote control, infrared centralized remote control, automatic meter reading control, and so on. Many electrical equipment manufacturers concerned about the technology which use personal communications terminal to achieve the remote control of electrical equipment.Using existing personal communications terminals to come ture the phone Distance control systems based on PLMN (land-based mobile communications network) and PSTN (Public Switched Telephone Network).This way can not only save costs, and are suitable for promotion.In this paper, the study and development trends of the remote control at home and abroad first to be introduced, and compares the differences among various remote control. Raised the long-range remote control device appliances design and construction which is based on the combination of a wireless remote control and public telephone networks, and use telephone lines to achieve remote control of appliances.Second ,It introduce the structure of the hardware circuit and software design process of the device. The device dominated part constitutes mainly by MCU, information processing, receiving external operating instructions to complete the identification of all kinds of information, form a variety of control signals . The Interface control of MCU and electrical and telephone equipment rely on the interface circuit.Focus introduction on dual audio DTMF decoder, and principle and method about control information coding wireless launch and receiver circuit. Against accurately control of the spread multi-channel controlled equipment raised a coding wireless launch control and the achievement way of the multi-channel electrical equipment. And did the analysis and study about the work stability and reliability of the product, given the actual electronic circuit debugging methods of circuit module and the anti-interference measures of circuit.The device, effectively, combine by the two forms of communication :PSTN and wireless remote control. Adopt a software planning that user authentication has the voice prompt interface, to make full use of existing communications resources to enhance the ability of anti-jamming, the operation face is friendly, so that the entire device have a flexible organizations, stable and reliable,low cost, long-range control area, and easy to use.