| 摘要 |
The present invention relates to a micro-balance based fine dust measuring device, which continuously measures the concentration of fine dust by automatically replacing filter papers, or automatically performs calibration using a weight for calibration. More specifically, an end part of a sample line (30) of sample air faces filter paper holders (60) mounted on a free end (11) of a taper-shaped hollow vibration tube (10), and the sample air supplied through the sample line (30) is discharged to a hollow hole inside the vibration tube (10) through the free end (110) after filtering the sample air by passing through filter papers of the filter paper holders (60). In addition, the mass of fine dust collected by the filter paper is measured by measuring a variation in a unique vibration frequency after vibrating the vibration tube (10) by a controller (200). Also, a plurality of the filter paper holders for measuring concentration (60), on which filter papers are mounted to collect fine dust and measure the mass thereof, and a filter paper holder for a weight (60a), which is designed for obtaining a mass conversion coefficient that is a mutual relation coefficient between the mass of fine dust and a vibration frequency, are mounted on a holder mounting plate (50). Accordingly, the filter paper holders (60, 60a) are replaced, and are mounted on the free end (11) of the vibration tube (10). |
