一种多功能频率测量系统  

A Multi-Function Frequency Measurement System

作　　者：钟杰[1] 房智[1] 

机构地区：[1]天津水泥工业设计研究院有限公司电气自动化室,天津300400

出　　处：《兵工自动化》2009年第6期60-61,65,共3页Ordnance Industry Automation

摘　　要：运用信号检测、控制与信息存储技术,用8位AVR单片机实现信号源的频率测试与电机控制。根据所测信号频率,采用PWM波实时调节电机的转速,实现光圈的开度控制。系统中PC机与AVR单片机间采用RS232串口进行数据通信。系统具有密码验证功能,满足安全要求。首先AVR单片机通过I2C总线读取存储器中的密码信息,然后将其与PC机传来的密码数据进行比较。如果密码正确,则启动系统。设计语音播报功能,采用凌阳SPCE061单片机进行语音处理。系统以C语言编程,可读性较好,可移植性强。实验表明系统设计合理可靠,满足设计要求。Introduces a multifunctional frequency measurement system, which applies technologies of signa! detection, control, information storage and single chip. According to the measured signal frequency, we used PWM method to adjust motor＇s speed in real time to realize Aperture＇s opening control. The measurement system uses RS232 serial port to transmit data between PC and AVR single chip, and has password validation function to meet safety requirements. First, AVR single chip gets code through I^2C Bus, then compares original code with code information from PC. If the code is correct, the system will start. The system has voice broadcast function by surplus SPCE061, and uses C language to program, so it has good readability and can be transplanted easily. Experiment results show the design of measurement system is reasonable and reliable, and can meet the design requirement.

关 键 词：频率测量 AVR单片机 I2C存储器 电机控制 语音播报 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]