| 摘要 |
An inspection system (1) is disclosed. The inspection system (1) comprises a transmitter (10) and a receiver (40) configured for communication with a remotely positioned processing means (80). The transmitter (10) and receiver (40) are arranged as a mobile apparatus (15) configured for insertion into any duct, conduit, pipeline, mining shaft, or the like, of any diameter or cross section. The transmitter (15) is configured to transmit an electromagnetic signal to induce an electromagnetic response in the duct and the electromagnetic response is detected by the receiver. The mobile apparatus (15) is self-powered and processes the electromagnetic response prior to communicating the processed response to the remotely positioned processing means (80) as a discrete signal
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