公开(公告)号：US20210199573A1

公开(公告)日：2021-07-01

申请号：US17203893

申请日：2021-03-17

Applicant: Harbin Engineering University

Inventor： Quan DONG ,  Yuqin ZHANG ,  Di WANG ,  Changhao LU ,  Zuo NI ,  Xiyu YANG

IPC: G01N21/39 ,  G01N33/00

Abstract: The disclosure discloses a methane value online real-time monitoring system, which includes a laser tunable system portion, a gas component detection system portion and a data processing system portion. The laser tunable system portion includes a computer, laser drivers, tunable lasers, a laser beam combiner, a collimator, and a beam expander, which are connected in sequence. The gas component detection system portion includes a gas supply system pipeline, a hose, a valve, and a gas chamber. The data processing system portion includes a detector, lock-in amplifiers, an oscilloscope, and a data acquisition card, which are connected in sequence. In a working process of the methane value online real-time monitoring system, gas mass namely the methane value change can be monitored in real time on line by collecting natural gas introduced into a combustion chamber through a gas supply system pipeline of a natural gas engine, and the knocking problem related to rapid change of the gas mass is solved. The whole system is easy to operate, low in cost, high in severe environment adaptability, low in maintenance cost, safe, free of pollution, capable of achieving real-time measurement, high