摘要
针对轨道交通机车车辆制动电阻温升试验时温度测量的需求,设计了一款基于图形化编程语言LabVIEW的多通道温度测量系统,可以实现14通道的温度同时采集、显示、绘图及数据保存。为提高系统测量精度,以测量系统的实测值和标准源约定真值作为多项式拟合的数据源,采用最小二乘法曲线拟合的方法对测量系统进行标定,来降低测量误差、提高测量精度。测试结果表明,系统运行稳定可靠,测量精度显著提高。
Aiming at the requirement of temperature measurement during the temperature rise test of the braking resistance of rail transit locomotives vehicle,a multi-channel temperature measurement system based on the graphical programming language LabVIEW is designed,which can realize simultaneous temperature acquisition,display,drawing and data storage of 14 channels.In order to improve the measurement accuracy of the system,the actual measured value of the measurement system and the agreed true value of the standard source are used as the data source for polynomial fitting,and the least square method curve fitting method is used to calibrate the measurement system to reduce the measurement error and improve the measurement accuracy.The test results show that the system is stable and reliable,and the measurement accuracy is significantly improved.
作者
黄永刚
李勇
石春珉
HUANG Yonggang;LI Yong;SHI Chunmin(Standards&Metrology Research Institute,China Academy of Railway Sciences Group Co.,Ltd.,Beijing 100015,China;China Railway Inspection and Certification Center Co.,Ltd.,Beijing 100015,China)
出处
《自动化与仪表》
2024年第3期66-69,74,共5页
Automation & Instrumentation
基金
中铁检验认证中心有限公司自主投入项目(BJ2022S04)。
关键词
机车车辆制动电阻
温升试验
LABVIEW
多通道温度测量
最小二乘法
测量系统标定
locomotive vehicle brake resistance
temperature rise test
LabVIEW
multi-channel temperature measurement
least square method
measurement system calibration
