PARTICLE MEASURING APPARATUS, AIR CLEANER, AND PARTICLE MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a particle measuring apparatus etc., that can secure long-period reliability.SOLUTION: A particle measuring apparatus 1 comprises: a particle detection sensor 110 having a light projection element 111 projecting light on a detection region DA and a light receiving element 112 receiving scattered light of light scattered by a particle 2 positioned in the detection region DA; an AD conversion part 161 which generates digital data as a digitized voltage signal by sampling and quantizing a voltage signal indicative of output from the light receiving element 112; and an arithmetic part 162 which computes a particle size after offset processing for subtracting digital data in a second period in which the voltage signal does not include a signal component from digital data in a first period in which the voltage signal includes a signal component corresponding to the particle 2.SELECTED DRAWING: Figure 1