Dust adhered on walls, floors, and electrical contacts can cause not only health hazards but also equipment failure and fires. However, there are few cases of measuring dust after it has accumulated. Most of the deposited dust is fiber, which we assume has fallen from clothing and cloth products. It is assumed that these fibers are weakly charged, and furthermore, they exhibit electrostatic properties due to their electrification and dielectric properties. We assume that the floating dust adheres to the wall or floor while walking randomly. The shape of the deposited dust is considered to be a condenser, which is mixture of air and fibers. In this paper, we confirm and discuss the electrostatic properties of dust in a room by using experiments and simulations. We have created a digital model of the dust and report that the amount of dust accumulation can be estimated from the dust model and its electrostatic properties. In addition, based on the electrical measurement of dust accumulation, we have made a prototype of a circuit board for dust accumulation distribution, and experimentally discuss the visualization of dust accumulation location information using sensor networks.

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