无线电高度表信号模拟器控制/显示模块设计

Design of Control and Display Module of Radio Altimeter’s Signal Simulator

无线电高度表信号模拟器是无线电高度表进行性能测试和检修时必需的专用仪器。本文设计一种采用C8051F320单片机作为主控制单元(MCU)和PCF8576作为液晶显示器显示驱动芯片的无线电高度表信号模拟器控制/显示模块组件。该控制/显示模块的MCU检测操作键盘的按键操作,向外部的射频信号延时/衰减模块发送相应的模拟高度选择和功率衰减值设置控制信号,同时向显示驱动芯片发送相应的显示控制信号,实现控制和显示功能。实际工程应用表明,该无线电高度表信号模拟器控制/显示模块可靠性好、操作简便、性价比高,具有较高的工程推广应用价值。

The radio altimeter＇ s signal programming simulator is a required equipment in altimeter＇ s test and maintaining. In this paper, control and display module of one new simulator is designed and manufactured. This module uses C8051F320 micro- processor as its MCU, and uses two LCD screens, which are drived by two PCF8576 chips, as its display. MCU can catch key- board＇ s action, and than send corresponding control signals to RF signal time delay and attenuation module and the display＇ s driver. In this way, control and display module can control the whole simulator, and communicate with operator. Successful utili- zation in daily maintenance of altimeters has proved that this control and display module has very high practical value, because it has many advantages, such as easy to operate, highly reliability, work stably.