Chinese Academy of Sciences

Lanxiang Sun

Haibin Yu

Yang Li

Wei Shan Dong

Zhibo Cong

Shuo Li

Yong Xin

Lifeng Qi

An online detection device underwater elements includes an LIBS system in a sealing pressure chamber and an external airflow control system. The airflow control system has a gas probe bin and a gas source. An opening is formed at one end of the gas probe bin while the other end and the sealing pressure chamber are hermetically partitioned through a glass window. A laser in the LIES system outputs laser to an underwater object surface to be detected for generating plasma spectra. A spectrometer collects plasma spectra returned along an original optical path. When the device operates in water, the balance gas storage tank produces gas with the same pressure as underwater. A flow model is invoked according to the current water pressure to accurately control the air flow rate to form a stable gas environment in the gas probe, which improves the plasma excitation and collection efficiency.

Online detection device and method for underwater elements based on LIBS technology

An in-situ on-line detection device and detection method for a long-distance metallurgical liquid metal component. The detection device comprises a front-end high-temperature resistant probe, a middle-end optical sensing device and a back-end control platform, wherein the head of the front-end high-temperature resistant probe is placed in a liquid metal, the tail thereof is coaxially connected to the middle-end optical sensing device, and an optical window is arranged in the connection position; and the middle-end optical sensing device is connected to the back-end control platform through a signal line. The detection device and detection method can provide a timely and valid message for quality control and a melting end, so that the detection time is greatly shortened, the detection distance can he adjusted extensively, the measurement result is accurate, and it can be achieved to measure components that are difficult to measure such as carbon, sulfur, phosphorous, etc.

In-situ on-line detection device and method for long-distance metallurgical liquid metal component

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Liaoning, China

Lanxiang Sun