河南城建学院学报2026，Vol.35Issue(3)：119-125,132,8.DOI:10.14140/j.cnki.hncjxb.2026.03.014
调制电压对SnO2传感器动态响应特性的影响
Effect of modulation voltage on the dynamic response characteristics of SnO2 sensors
摘要
Abstract
To improve the linearity of SnO2 gas sensors for transformer fault diagnosis,this study explores the impact of dynamic temperature modulation modes on sensor performance.Using methane as a typical fault gas,and based on static testing,four voltage wave forms—sine,square,frequency-modulated(FM)and amplitude-modulated(AM)—were applied to modulate the temperature of the sensor,and its dynamic response under different methane concentrations was measured.The maximum amplitude of the response signal was extracted as a characteristic value,and the correlation coefficient(R2)between this value and the gas concentration was calculated to evaluate the linearity under each modulation mode.Results show that dynamic temperature modulation significantly enhances linearity compared to static heating(R2=0.951 2).Among the modulation modes,sine wave modulation(period:25 s)yields R2=0.983 9,square wave modulation(period:15 s)yields R2=0.989 3,AM modulation yields R2=0.993 4,and FM modulation achieves the highest linearity with R2=0.997 5.This study demonstrates that using FM wave temperature modulation can effectively improve the linear performance of SnO2 gas sensors in detecting transformer fault gases,providing technical support for high-precision online monitoring.关键词
变压器/故障诊断/SnO2/气体传感器/温度调制/线性度Key words
transformer/fault diagnosis/SnO2/gas sensor/temperature modulation/linearity分类
信息技术与安全科学引用本文复制引用
程珍珍,商长安,王晓乐,李方涛,范鲁亚,何国锋..调制电压对SnO2传感器动态响应特性的影响[J].河南城建学院学报,2026,35(3):119-125,132,8.基金项目
国家自然科学基金项目(62441304) （62441304）
河南城建学院校级应用型本科课程建设项目(J-X2023096) （J-X2023096）
