航空发动机转速测量系统的设计  

Design for speed measuring system of aeroengine

作　　者：赵艳东[1] 于林明[1] 陈显利[1] 

机构地区：[1]青岛科技大学自动化与电子工程学院,青岛266042

出　　处：《电子测量技术》2011年第11期81-84,共4页Electronic Measurement Technology

基　　金：青岛市科技计划基础研究项目基金(编号:10-3-4-4-3-jch)资助项目

摘　　要：提出了1种数字脉冲式的测速发电机测速方法。利用电压比较器将正弦波转换为数字脉冲,并利用PLC的高速脉冲计数功能进行脉冲计数,通过软件编程对数据进行了计算分析。不仅结构简单,而且构建成本低。实验结果表明当发动机转速从10r/min到3 000r/min时,测速精度一直控制在0.1%以下,检测时间也保持在500ms以内,所提出的测速方法能够精确实时地测量出航空发动机的转速,在宽范围内具有测速精度高、分辨率高和实时性高等优点。A method for speed measurement by tachometer generator in digital pulse is proposed.Sine wave is transformed to digital pulse by voltage comparator.The digital pulse is counted by the function of rapid counting pulse of PLC.Data is calculated and analyzed by programming software.The design have not only simple constructions,but also low building cost.Experimental results demonstrate that the rate accuracy is always controlled below 0.1% and detection time is also controlled below 500 ms when engine speed is changed from 10 r/min to 3 000 r/min.The proposed method can measure the speed of Aeroengine accurately in real time.The method has the merits of high accuracy,resolution and real-time etc when the speed is over a wide range.

关 键 词：电压比较器 PLC 测速 航空发动机 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]