矿用IP网络广播终端硬件设计

Design of hardware of terminal of mine-used IP network broadcast

针对现有矿用广播系统传输距离短、速率低、容量小等问题,提出了一种基于以太网的矿用IP网络广播终端的硬件设计,重点介绍了主控制器、语音编解码器、以太网接口、音频功放的设计选型及使用中的注意事项。测试结果表明,矿用IP网络广播终端信号最大不失真输出电压达到5.5~6V,输出功率达到4W,信号失真度小于5%,完全能满足煤矿广播的要求。

For problems of short transmission distance, low transmission rate and small capacity existed in current mine-used broadcast system, a design of hardware of terminal of mine-used IP network broadcast based on Ethernet was proposed. Selections of the main controller, voice codecs, Ethernet network interface and audio amplifier, and matters needed attention in their use were focused on. The test results show that the maximum undistorted output voltage of signal of the terminal reaches 5. 5-6 V, output power reaches 4 W, and signal distortion is less than 5%, which is fully able to meet the requirements of coal broadcast.