基于LabWindows/CVI的车内气压波动信号处理  

Signal processing of air pressure fluctuation in train based on LabWindows/CVI

作　　者：李庆伟[1] 苏燕辰[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《中国测试》2012年第3期87-89,共3页China Measurement & Test

摘　　要：列车车内气压波动影响行车中旅客舒适度,因而研究车内气压波动信号可以有效地测试车内气压波动情况。为进一步改进车体结构、保障旅客舒服,采用空气压力传感器对车内压力进行了在线检测。利用LabWindows/CVI软件开发平台,采用巴特沃思低通滤波方法进行粗略提取,实现车内气压波动信号的显示和处理。实验表明:该系统结构简单,运行速度快,抗干扰性强,具有较高的可靠度。Air pressure fluctuation affects the comfort level of passenger in the driving train, thus the study of the air pressure fluctuation signal in train will be effectively helpful for testing the air pressure fluctuations. In order to further improve the body structure of the train to protect the passengers＇ comfort level, pressure sensor was used to locally monitor the air pressure inside the train. Using the software development platform LabWindows/CVI, the authors roughly extracted the air pressure fluctuation signal in train with Butterworth low-pass filtering method, and made the signal displayed and processed. Practice shows that the system is simple, fast, of strong anti- interference, and highly reliable.

关 键 词：气压波动 压力传感器 LABWINDOWS/CVI平台 巴特沃思低通滤波器 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论] TP312[自动化与计算机技术—计算机科学与技术]