电子器件Issue(4)：958-960,3.DOI:10.3969/j.issn.1005-9490.2015.04.047
基于STM32的矿用直流载波电话设计
Design of Mine-Used DC Carrier Telephone Based on STM32
吴克祥1
作者信息
- 1. 池州职业技术学院机电技术系，安徽 池州247000
- 折叠
摘要
Abstract
To abide by the design principles of mine intrinsically safe circuit,according to the need of underground communication in coal mine,a design scheme of DC carrier telephone was proposed which can directly dial. The de-sign circuit of the telephone is introduced in detail. The telephone’s voice signals are generated by the microphone. After enlarged then the voice signals are modulated to frequency signals by LM567 chip. The frequency signals are coupled by transformer and then transmitted by 12 V DC power supply line to the other voice terminals. In the voice terminal the signals are demodulated by LM567 demodulation circuit and enlarged by LM386,then the amplified au-dio signals are output from a speaker. The dialing circuit is designed based on the STM32 MCU. The dial informa-tion is transmitted to the other telephone terminals by CAN bus. The measured call distance is greater than 2 000 m,acoustic volume is larger than 85dB,good results.关键词
直流载波/电话/STM32/CAN总线/LM567Key words
DC carrier/telephone/STM32/CAN bus/LM567分类
矿业与冶金引用本文复制引用
吴克祥..基于STM32的矿用直流载波电话设计[J].电子器件,2015,(4):958-960,3.
