A solid-state concentration sensor for wind tunnel dispersion measurement

用于风洞分散测量的固态浓度传感器

• 批准号: NE/X012298/1
• 负责人: David Birch
• 金额: $ 9.61万
• 依托单位: University of Surrey
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FX012298%2F1
• 关键词: solid; state; concentration; sensor; wind

Studying how air pollution moves around between buildings is a very complicated problem: the flow of wind between buildings can be chaotic and unpredictable; the weather conditions are always changing, and there are many different possible sources of pollution. Wind tunnel measurements are still a valuable, trusted and efficient way to study how pollution spreads under these conditions. To simulate pollution, a tracer gas that can be detected by specialised sensors is used. These sensors are accurate and fast, but very, very expensive. On the other hand, you can get inexpensive microchip-based sensors now that can detect specific gases very accurately. The purpose of our project is to adapt these inexpensive sensors to the specialised application of measuring tracer gases in wind tunnels. The challenges here are getting the slow microchip sensors to work much more quickly, and to build a probe around the sensor that can quickly suck up small amounts of gas and get that gas to the sensors. If successful, we would be able to use large numbers of tracer gas probes at the same time: this means that (a) we could compare what was happening over large areas in the wind tunnel, despite how chaotic the flow can be- and (b) we could measure many points at once, drastically reducing the amount of time that the wind tunnel would need to run. We may even be able to get probes to respond to more than one type of tracer gas at the same time: this is something that hasn't been done before, so it would open up new avenues of research.

研究空气污染如何在建筑物之间移动是一个非常复杂的问题：建筑物之间的风的流动可能是混乱和不可预测的；天气条件总是在变化，而且有许多不同的可能污染源。风洞测量仍然是研究这些条件下污染如何传播的一种有价值、可信和有效的方法。为了模拟污染，使用了一种可以由专门的传感器检测到的示踪气体。这些传感器准确、快速，但非常非常昂贵。另一方面，你现在可以得到廉价的基于微芯片的传感器，可以非常准确地检测特定的气体。我们项目的目的是使这些廉价的传感器适用于风洞中测量示踪气体的专门应用。这里的挑战是让速度较慢的微芯片传感器工作得更快，并在传感器周围建造一个探测器，可以快速吸收少量气体，并将这些气体输送到传感器。如果成功，我们将能够同时使用大量示踪气体探测器：这意味着(A)我们可以比较风洞中大片区域发生的事情，尽管气流可能有多么混乱-以及(B)我们可以一次测量多个点，从而大幅减少风洞需要运行的时间。我们甚至可能让探测器同时对多种示踪气体做出反应：这是以前从未做过的事情，所以它将开辟新的研究途径。