基于Multisim的油中水分红外光谱检测电路研究

打开文本图片集

中图分类号：TM930.2 文献标志码：A doi：10.3969/j.issn.1006-0316.2026.02.002

文章编号：1006-0316（2026）02-0010-07

Infrared Spectral Detection Circuit ofMoisture inOil Based onMultisim

CHENRui

（Hebei Key Laboratory ofMine Equipment Safety Monitoring，School of Emergency Equipment， University of Emergency Management， Yanjiao O65201， China）

Abstract ∵ In response to the demand for accurate detection of moisture content in oils within the industrial sector，an innovative designscheme for moisture detection inoil based on infrared spectroscopy is proposed. The circuits required for this scheme are studied，and a complete detection circuit model is constructed on the Multisim platform， covering the infrared constant current driving module， photodetector receiving module， front amplification，filtering，secondary amplification，and secondary filtering.Simulationresults indicate that within the moisture content detection range from O to 1000mg/kg ，the output voltage and current parameters of each key module in the circuit show a significant negative correlation with the moisture content in the oil.The infrared constant current driving circuit outputs stable signals.The front amplification module achieves an amplification of 30-50 times in the signal conditioning circuitt.The bandpass filter module suppresses noise interfernce.The main amplification module and low-pass filtering module are cascaded to ensure that the output voltage meets the requirements for subsequent A/D conversion. This fully verifies the effectiveness and feasibilityofthe detectioncircuit，providingaviable technical solution for the circuitdesignof moisture content detectioninoil.

Key words ∵ Multisim；moisture detection in oil; infrared absorption type;circuit design

油液中含有水分不仅会降低油的质量，还会对设备、环境方面造成不良影响。（剩余6481字）