Lidar Monitoring of Dust Distribution in Time and Height Released from Clothes into the Air Inside a Room by Several Daily Actions

Abstract

  It is important to understand the movement of dust released from clothes in the living room for our health. For this investigation, a simple and small lidar system for such a room was developed using a laser pointer and a camera. Its performance was verified by comparing it to a commercial particle counter using man-made dust from such things as textiles, sprays, and chalk dust. The movement of dust released from clothes by several daily actions such as taking off clothes, hitting or wiping them, and moving around a room were visualized as a distribution image in time and height. In the case of taking off clothes, the greatest amount of dust occurred by the action of taking off pants. Hitting clothes also released a large amount of dust, but the spread area was limited. Conversely, wiping clothes caused smaller dust particle counts, but the dust floated longer in the air. Additionally, and of particular interest, the effect of walking indoors on the spread of dust was imaged numerically.