| 摘要 |
The invention provides a system for detecting blockages or other anomalies in pitot tube (1) and static tube (14, fig. 2) of aircraft whether the aircraft is in the air, or on the ground, enabling the pilot, or the auto pilot, to take the necessary action in order to keep the aircraft safe. The system comprises a transducer (10) configured to transmit acoustic signals and a transducer (7) configured to receive the signals from the transducer (10) after the signal has been altered by the transmission characteristics of the tube (3) being monitored. The system also comprises a control module (9) configured to analyse the characteristics of the received signals at different frequencies whereby changes to the characteristics with frequency will indicate an anomaly within the tube (3) or environment being monitored by the system. The invention may comprise a single boxed unit, see fig. 3.
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