基于微控制器的会见电话系统设计-电力电子与电力传动专业论文.docx

摘要 摘要 万方数据 万方数据 摘 要 随着现代社会的发展，社会实际需求不断更新，智能化设施、设备层出不 穷。监狱作为司法体系的一个重要组成部分之一，也逐步地走向现代化。这其 中，监狱会见电话系统是监狱管理系统中必不可少的一部分，对监督、管理服 刑人员起到非常重要的作用。本课题针对传统会见电话系统存在的一些问题， 并根据监狱的实际新要求，设计了两种基于微控制器的会见电话系统：分线制 会见电话系统和总线制会见电话系统。 分线制会见电话系统是以单片机作为控制核心，设计了恒流源供电电路、 会见分机电路，LED 显示电路、电源转换电路、监听插话电路、录音接口电路 和相应的控制软件来控制会见流程，它是基于模拟信号传输的会见电话系统。 总线制会见电话系统采用 MC145480 PCM 编解码滤波器进行语音 A/D、 D/A 转换，实现语音数字化，选用 PIC18FXXK80 系列单片机作为系统控制核 心，并通过其内嵌的 CAN 控制器构成系统 CAN 总线，除了传输相关控制命令 以外，CAN 总线还承担传输语音数字信号，这是 CAN 总线技术一种新的应用 方式，它是完全数字化的智能语音会见电话系统。 分线制会见电话系统已经开始量产，市场反应良好。总线制会见电话系统 已完成了主要功能调试，具备了形成产品的良好基础，与分线制相比总线制系 统在管理和监控操作方面更加人性化，在安装和成本方面也具有明显优势。 关键词：分线制；会见电话系统；总线制；PIC 单片机；MC145480；CAN 总 线 I AB ABSTRACT ABSTRACT With the development of modern society, the practical needs of society constantly updated, intelligent facilities and equipments abound. The prison is one of the judicial systems which is an important part of, is also gradually towards modernization. And the prison visiting phone system, which plays a very important role of supervise and manage inmates, is an essential part of the prison management system. In this paper, according to some problems of the conventional visiting phone system existed, and the actual requirements of the customers, two kinds of visiting phone system base on micro-controller has been designed. That is the sub-wire visiting phone system and the bus visiting phone system. The sub-wire visiting phone system is with the MCU control at the core, designs on the constant current source power supply circuit, the visiting substation circuit, the LED display circuit, the power conversion circuits, the monitor and chime in circuit, the recording interface circuit and the appropriate control software to control the visiting process, which is a visiting phone system base on the analog signal transmission. The bus visiting phone system uses the MC145480 PCM Codec-Filter for voice A/D, D/A conversion to digitize the voice, uses the PIC18FXXK80 MCU as the system control core and constitutes the C