中图分类号： TP311.1 文献标识码： A DOI：10.16157/j.issn.0258-7998.200007 中文引用格式： 吕文发. 一种基于8255A的自整角机信号控制技术研究[J].电子技术应用，2020，46(10)：64-68. 英文引用格式： Lv Wenfa. Research on control technology of synchro signal based on 8255A[J]. Application of Electronic Technique，2020，46(10)：64-68.
Research on control technology of synchro signal based on 8255A
Jiangsu Automation Research Institute of CSIC，Lianyungang 222006，China
Abstract： The signal of Selsyn is a kind of high frequency and high voltage AC analog signal, which is used to transmit angle information in the fire control system. The voltage level represents different angle sizes, which is convenient for the computer system to process. It is necessary to digitize these analog signals. In this paper, 8255A is used as the control chip, and the analog-to-digital and digital-to-analog conversion controllers are used to carry out real-time signal of selsyn，a control method of digital acquisition and analog conversion processing is proposed. The analog-to-digital converter completes the digital acquisition of the analog signal of the external input AC selsyn and sends it to the computer system. The digital / analog converter completes the analog conversion of the computer system and sends it to the external equipment. The 8255A completes the input and output control of the conversion data. It has the characteristics of flexible control, simple circuit, strong real-time, high reliability and so on. It is widely used in fire control system.