An Inexpensive Low-Power Ultrasonic 3-Dimensional Air Velocity Sensor

Ghahramani, Ali; Zhu, Megan; Przybyla, Richard J.; Andersen, Michael; Min, Syung; Zhang, Hui; Peffer, Therese; Arens, Edward

doi:10.1109/sensors43011.2019.8956901

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…The anemometer has a resolution and starting threshold of 0.01 m/s, an absolute airspeed error of 0.05 m/s at a given orientation with minimal filtering, 3.1 ° angle and 0.11 m/s velocity errors over 360 ° azimuthal rotation, and 3.5 ° angle and 0.07 m/s velocity errors over 135 ° vertical declination. For more details, please refer the works by Ghahramani et al (2019) and Arens and colleagues (2020) 45,46 . Figure 2 shows a typical ultrasound sensor used in these experiments, with the tetrahedral arrangement of the transceivers.…”

Section: Methodsmentioning

confidence: 99%

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Three‐dimensional analysis of the effect of human movement on indoor airflow patterns

et al. 2020

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Human activity is known to leave significant effects on indoor airflow patterns. These patterns are carefully designed for many facilities such as cleanrooms, pharmaceutical settings, and healthcare environments, where human‐induced wakes contribute to the transport of contaminants. Therefore, the knowledge about these wakes as it relates to indoor air quality is critical. As a result, a series of experiments were conducted in a controlled chamber to study the three‐dimensional effects of true human walking on airflow. Experiments were designed to capture the effect of human walking under three different flow conditions, and for two different walking schemes. The results show that the effect of walking on the airflow is not negligible and can sustain up to 10 seconds after the moving body has passed. Walking on a straight line creates significant change in the velocity normal to the walking path and vertical to the plane of walking movement. These changes were detectable till 1.0 m away from the walking track. Also, the similarity between airflow patterns of walking once and twice illustrated a promising opportunity of predicting the flow patterns of random walk from a set of base cases.

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Section: Methodsmentioning

confidence: 99%

“…Through this sensing system, one data point was logged (2020). 45,46 Figure 2 shows a typical ultrasound sensor used in these experiments, with the tetrahedral arrangement of the transceivers.…”

Section: Sensing Instrumentsmentioning

confidence: 99%

Three‐dimensional analysis of the effect of human movement on indoor airflow patterns

et al. 2020

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The effect of door opening on air-mixing in a positively pressurized room: Implications for operating room air management during the COVID outbreak

Bhattacharya

Ghahramani

Mousavi

2021

Journal of Building Engineering

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Towards Personalization of Indoor Air Quality: Review of Sensing Requirements and Field Deployments

Goh

Mousavi

et al. 2022

Sensors

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As humans spend more time indoors, ensuring acceptable indoor air quality (IAQ) through ubiquitous sensing systems has become a necessity. Although extensive studies have been conducted on the IAQ sensing systems, a holistic review of the performance and deployment of Ubiquitous IAQ Sensing (UIAQS) systems with associated requirements in IAQ sensing standards is still lacking. In this study, we first reviewed IAQ pollutants and other IAQ-related factors and the associated requirements in the prominent IAQ sensing standards. We found that while non-pollutant factors are influential on occupants’ perception of IAQ and their satisfaction, they do not have evaluation metrics in the IAQ standards. Then, we systematically reviewed field studies on UIAQS technologies in the literature. Specific classes of information were recorded and analyzed further. We found that the majority of the UIAQS systems did not meet the requirements of the prominent IAQ sensing standards and identified four primary research gaps. We concluded that a new holistic and personalized approach that incorporates UIAQS measurements and subjective feedback is needed. This study provides valuable insights for researchers and policymakers to better improve UIAQS technologies by developing personalized IAQ sensors and sensing standards.

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An Inexpensive Low-Power Ultrasonic 3-Dimensional Air Velocity Sensor

Cited by 3 publications

References 11 publications

Three‐dimensional analysis of the effect of human movement on indoor airflow patterns

Three‐dimensional analysis of the effect of human movement on indoor airflow patterns

The effect of door opening on air-mixing in a positively pressurized room: Implications for operating room air management during the COVID outbreak

Towards Personalization of Indoor Air Quality: Review of Sensing Requirements and Field Deployments

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