Pressure-sensitive paint (PSP) is a measurement technique based on the quenching phenomena of luminescent molecules. Using PSP, pressure field on model surfaces can be evaluated from luminescence intensity of the paint emission. In order to use PSP in production wind tunnel testing, the measurement system called Pressure-Field Imaging Camera System (PICS) has been developed. The hardware of PICS is consists of an excitation light, light delivery system, a filter wheel, a high-resolution CCD camera, computer system, a sample calibration chamber, etc. The whole processes, including data acquisition, image processing, and paint calibration are handled by a set of dedicated software. Simple image processing is made on site in an interactive manner and data is stored for more sophisticated post processing. In this paper, the specification and construction of PICS are described in detail and applications of PICS to transonic wind tunnel testing is presented.
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