Stand-off laser raman spectroscopy for high-temperature oxygen concentration sensing
A non-contact, fluorescence-suppressed Raman spectroscopy sensor using a 355 nm laser for real-time oxygen concentration measurements in harsh smelting environments. This technology enhances process efficiency, reduces emissions, and is retrofit-ready for existing systems.
Overview
The stand-off laser Raman spectroscopy technology offers a sophisticated solution for real-time oxygen concentration sensing in sulfide smelting operations. By utilizing a non-contact approach, this sensor system can withstand the harsh conditions of a melting furnace, providing operators with precise oxygen data to optimize combustion conditions. This leads to reduced fuel consumption and minimized emissions of harmful gases like SO₂. The technology is designed to be easily retrofitted into existing systems, making it a practical and cost-effective solution for industrial applications.
Technical specifications
- Laser Source: Utilizes a compact 355 nm pulsed laser to enhance Raman signal efficiency
- Fluorescence Suppression: Time-gated detection effectively suppresses background noise
- Measurement Specificity: Oxygen's Raman spectral features are selectively detected using bandpass filters, eliminating the need for a spectrometer
- Sensor Instrumentation: Includes a high-speed 4-channel ADC with a sampling rate of 250 MS/s, and variable delay and integration time managed by a Xlinix 7010 FPGA chip
- Configuration: Designed for a four-channel setup for oxygen, SO₂, and background calibration
Technology readiness level
This technology is at TRL 4, indicating that it has been validated in a laboratory setting. The proposed future work includes developing a deployment and packaging scheme for field testing, further enhancing the system's readiness for industrial applications.
About University of Pittsburgh
The University of Pittsburgh is a large, comprehensive public research university anchored in an urban innovation corridor with a strong translational focus. Integration with UPMC, a leading academic medical center, enables clinical studies, access to broad patient populations, and co-located clinical–engineering labs that shorten paths from discovery to deployment. A nearby research and technology district, extensive core facilities, and an engineering co-op program give companies entry points for prototyping and talent pipelines. Research is supported by competitive federal funding from agencies such as NIH, NSF, DoD, and DOE. A dedicated technology transfer office provides IP strategy, licensing, startup support, and contracting for industry partners.
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