DONG, Lei,WU, Hongpeng,TITTEL, Frank K.,XIAO, Liantuan,JIA, Suotang
申请号：
WO2018CN78020
公开号：
WO2018188429(A1)
申请日:
2018.03.05
申请国别(地区):
世界知识产权组织国际局
年份:
2018
代理人:
摘要：
A beat effect-based quartz-enhanced photoacoustic spectroscopy apparatus and method, the apparatus comprising a photoacoustic signal detection module, a gas chamber (2), a light source module and a data collection module; by means of detecting a beat signal generated by a process of mixing a piezoelectric signal output by a quartz tuning fork (1) and a demodulation signal of a lock-in amplifier (9), the present invention can accurately obtain electrical parameters of a quartz crystal oscillator and concentration of a gas to be detected on a millisecond time scale; the present invention can be used for online monitoring of gases in fields including environmental monitoring, food safety monitoring and industrial production control.
