| 摘要 |
An apparatus (10) for detecting particles in an airflow is disclosed. The apparatus (10) is of the type that detects light scattering from an illuminated volume to determine a level of particles in an airflow passing through said illuminated volume. The particle detection apparatus (10) includes a plurality of spatially separated, monitored, illuminated volumes (34, 38) from which scattered light is to be detected by one or more light detection stages (30, 32). The particle detection apparatus (10) is configured to compare a signal indicative of the light scattered from a plurality of monitored, illuminated volumes to confirm either the detection of particles in the airflow or that a false particle detection condition has occurred. |
