Development of "Fluid Temperature Scanner" (Adaptive Response Compensation and Image Motion Measurement of In-Line Fine-Wire-Thermocouple Probe)

提出了一种新的非等温气体流动空间温度分布可视化测量技术。通过使用市售的高速CCD相机跟踪专门开发的多传感器温度探头的运动路径，我们可以定量测量二维温度分布，并将其投影到CCD相机获得的测量对象图像中。关键技术是基于“双热电偶探针技术”的自适应响应补偿方案，该方案可以充分补偿温度传感器的响应滞后；因此，可以准确地重建温度分布。作为一个例子，我们已经证明了从吹风机喷出的热空气射流的温度场可以很容易地和定量地可视化。结果表明了所提出的可视化技术的有效性和实用性。

A novel measurement technique for visualizing the spatial temperature distribution of a non-isothermal gas flow has been developed. By tracking the movement path of a specifically-developed multi-sensor temperature probe using a commercially-available high-speed CCD camera, we can measure quantitatively a two-dimensional temperature profile and project it to the measurement object image obtained by the CCD camera. The key technique is an adaptive response-compensation scheme based on a "two-thermocouple probe technique," by which the response lag of the temperature sensors can be adequately compensated; hence the temperature profile can be reconstructed accurately. As an example, we have demonstrated that the temperature field of the hot-air jet ejected from a hair dryer can be visualized readily and quantitatively. The results show the effectiveness and usefulness of the proposed visualization technique.