| 摘要 |
The purpose of the present invention is to shorten a time lag from the occurrence to the detection of blockage in a pipe when the blockage suddenly occurs. A receiving unit (6) receives differential pressure data (pressure data) from a differential pressure transmitting unit (pressure detecting unit). A feature amount calculating unit (7) divides the time series of the received differential pressure data into multiple sections in order to calculate a feature amount which displays pressure fluctuations at each section. A change rate calculating unit (8) processes the feature amount of a fixed time section through smoothing at each section and calculates a change rate which displays changes in the blockage state of an impulse pipe at each sector from the feature amount processed through smoothing. A determining unit (9) determines the blockage state of the impulse pipe based on the change rate acquired by the change rate calculating unit (8). The change rate calculating unit (8) uses a triangular motion average processing, a least square method, etc. for the smoothing processing. [Reference numerals] (10) Reference characteristics memory unit; (100) Apparatus for diagnosing the blockage of an impulse pipe; (11) Alarm outputting unit; (6) Receiving unit; (7) Feature amount calculating unit; (8) Change rate calculating unit; (9) Determining unit; (AA) Pressure data |
