I-Corps: Chemical sensors for airborne detection

I-Corps：用于机载检测的化学传感器

• 批准号: 1931656
• 负责人: Adam Hauser
• 金额: $ 5万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-15 至 2020-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1931656&HistoricalAwards=false
• 关键词: Corps; Chemical; sensors; airborne; detection

The broader impact/commercial potential of this I-Corps project is to enable airborne chemical sensors that are smaller, lighter, and lower cost than existing technology. The devices developed here enable low-power chemical sensing on ultralight drones, in wearable technology, and in small spaces where current technology would not fit or would be prohibitively expensive. The global chemical sensors market, including defense (chemical weapons, explosives), domestic security/first responders (opioids, bomb detection, breath sensors) and industrial hygiene (toxic industrial chemicals) sectors, produces more than $5B in annual revenue, with toxic gas sensors representing $1.5B. This project looks serve markets in the defense, domestic security, and first response sectors due to the size and weight advantages.This I-Corps project further develops an alternating current impedance technology to detect dielectric changes in custom designed sensor materials. Tuning the probe frequency to target specific chemical interactions allows our sensor to be more selective: For instance, probe frequencies can be chosen to avoid environmental interference, such as water vapor which typically manifests only low-frequency (100Hz) impedance changes. The method allows greater selectivity with fewer probe elements, allowing simpler devices that can be made smaller, and at lower cost, compared to devices of similar performance. The project incorporates frequency selection into a device that uses an interdigitated capacitor with overlaid thin film of colorimetric material. A microcontroller controls input, feedback, and an impedance analyzer for continuous measurements at targeted frequencies.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该I-Corps项目的更广泛的影响/商业潜力是使空气寄生的化学传感器能够比现有技术更小，更轻且成本较低。 此处开发的设备可以在超轻无人机，可穿戴技术以及当前技术不合适或价格昂贵的小空间上进行低功率化学感测。 全球化学传感器市场，包括国防（化学武器，炸药），国内安全/第一响应者（阿片类药物，炸弹检测，呼吸传感器）和工业卫生（有毒工业化学品）部门，每年收入超过5B美元，有毒气体传感器代表$ 1.5B。 由于规模和重量优势，该项目看起来为国防，国内安全和第一响应部门提供服务。该I-Corps项目进一步开发了一种交替的当前阻抗技术，以检测定制设计的传感器材料的介电变化。 调整探针频率以靶向特定的化学相互作用可以使我们的传感器更具选择性：例如，可以选择探针频率以避免环境干扰，例如通常仅表现出低频（100Hz）阻抗的水蒸气。 该方法可以通过更少的探针元素进行更大的选择性，与相似性能的设备相比，可以使更简单的设备以较小的成本制成。 该项目将频率选择纳入了使用与比色材料覆盖的薄膜的装置电容器的设备中。 微控制器控制输入，反馈和阻抗分析仪，用于在目标频率下进行连续测量。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的评估来审查标准的评估。