Calibration and Automated Warning System for Trace Gas Concentration in Cables Based on Photoacoustic Spectroscopy
To improve the accuracy and speed of cable trace gas concentration warning,a cable trace gas concentra-tion calibration and automated warning system based on photoacoustic spectroscopy is designed.The system detects the second harmonic information of the photoacoustic signal through the acquisition device and scales the gas con-centration with the calibration meter.The early warning terminal starts the abnormal diagnosis model based on the RBF neural network,extracts statistical features and makes classified diagnosis.If there is an abnormality,the system will activate the sound and light alarm device to enter the automatic warning state through voice alarm and light warning.After experimental testing,the designed system utilizes photoacoustic spectroscopy technology to remotely de-tect trace gases in cable tunnels.The abnormal diagnosis results of trace carbon monoxide gases are accurate,and the automatic warning time delay for abnormal concentration gases is within 0.4 seconds.
photoacoustic spectroscopycable trace gas concentration calibrationautomated early warningabnormal diagnosisRBF neural network
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