5 April 2017 NIR intensity sensor for water pressure monitoring
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Secondary cooling presents control challenges. Conventional feedback control systems cannot be used effectively due to the insufficient reliability of temperature sensors. Here we propose a simple optical technique in placing intensity based portable optical sensor for a rapid nondestructive calibration of water distribution and pressure on dummy bar from nozzles in the secondary cooling system. For non-destructive testing, the proposed system would make use of the data collected by the optical sensor array to help calibrate the water nozzles in temperature control in cooling system. In this paper, we will present the design and characterization a new optical water pressure sensor. Initial field test shows this NIR intensity sensor is capable of operating in the specified range with good repeatability and low hysteresis. Experiment result shows that the impedance of sensing material changes relative linearly with relative humidity, and also features fast response (~4s). The overall sensing range of the sensor is from 20 to 80% and the sensitivity is about 2%.
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Wei-Chih Wang, Wei-Chih Wang, Chun-Wei Wu, Chun-Wei Wu, Ling-Chih Chen, Ling-Chih Chen, } "NIR intensity sensor for water pressure monitoring", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 1017012 (5 April 2017); doi: 10.1117/12.2260432; https://doi.org/10.1117/12.2260432

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