基于DSP+FPGA的船用推进电机转速检测方法  

A Velocity Detection Approach to Ship Propulsion Motor Based on DSP+FPGA

作　　者：厉孟 蔡宗举 阮俊 Li Meng Cai Zongju Ruan Jun(Naval Representatives Office of Combat System in Beijing, Beijing 100094, China China Shipbuilding Industry System Engineering Reseach Institute, Beijing 100094, China Jiangsu Daquan Kfine Electric Co., Ltd, Zhenjiang 212211, China)

机构地区：[1]海军驻北京作战系统军事代表室,北京100094 [2]中国船舶工业系统工程研究院,北京100094 [3]江苏大全凯帆电器股份有限公司,南京212211

出　　处：《船电技术》2017年第2期63-66,共4页Marine Electric & Electronic Engineering

摘　　要：采用M/T法转速测量原理,提出了一种基于DSP+FPGA的转速测量方法。FPGA检测光电编码器输出脉冲,根据正交编码特性判断旋转方向,同时对信号四倍频处理,提高了转速检测精度。FPGA在设定的控制周期内完成转速检测,产生DSP数据读取中断,DSP通过地址线和数据线读取FPGA存储的转速信息并进行转速计算。仿真和试验验证了FPGA转速检测程序的准确性。该检测程序测速精度高,低速检测性能好,适用于低速大功率的船用电力推进转速检测,并可直接作为转速检测模块应用于控制系统。This paper puts forward a kind of speed measurement method based on DSP＋FPGA by the method of M/T speed measuring. FPGA is responsible for detecting the photoelectric encoder output pulse, to judge the direction of rotation according to the signal characteristic, at the same time, the signal frequency is increased by four times, to improve the speed of detection accuracy. In the control period, FPGA was used to detect the speed, and generate DSP data read interrupt when DSP read FPGA memory speed information by the address and data buses, then calculates the speed. The accuracy of the method has been validated by the simulation and experiments. The detection procedure has advantages of high precision, low detection performance, strong universality. It can be directly used as speed detecting module in the control system, Especially be suitable for low speed detection in ship propulsion.

关 键 词：FPGA DSP 推进电机 转速检测 

分 类 号：TM383.4[电气工程—电机]