基于DTMF的智能电话控制器的设计与开发.docVIP

DTMF-based intelligence telephone controller (Source: Monolithic machine and dyadic implantation system application) Abstract: Introduce one kind of DTMF (dual-tone multifrequency) signal and RS485-based long-range intelligence controller. It has ringing detecting and the signal simulating Off Hook , DTMF decoding , infrared remote control code certainly lifts the function studying and launching the multi-path infrared remote control signals. Composition , hardware allocation, software to that controller design , operating principle , the function discuss detailedly as well as the technology function has been in progress the main body of a book. That controller uses the queen , testifies the person convenient , reliable and has practical value in long-range under the control of data terminal system. Keywords: DTMF； RS485；Infrared remote control；MT8870 1． Summary Horizontal going a step further improves with the industrial automation, industry scene guarding in a lot of self-service, hope is able to carry out long-range controlling on equipment and monitor , interposes with data collect as well as are in progress to long-range data terminal. Telephones gradually universal the scene installs a telephone will do in industry becoming possibility. The in-bridge having designed and making one kind of DTMF (Dual Tone Multiple Frequency)-based multiplex telephony controller according to this condition , us, as long as with telephone controller can pass it right away on industry scene telephone line, with using telephone now and then everywhere to equipment be in progress on-off control, data acquisition, long-range interpose and so on . Besides, horizontal ceaseless society economy rise already begins urge the family automation, people is hoped being able to put long-range supervisory control into practice always and everywhere to family safety and puts long-range under the control of into practice to the home appliance. Because the telephone line is that the whole nation