| 摘要 |
<p>A detector system for sensing the progress of an ISV process along an expected path comprises multiple sensors (64, 52). The sensors relay electrical signals representative of temperatures in their vicinity to a signal processor (54) which in turn generates an encoded signal which identifies the particular sensor and whether the ISV process has reached the sensor's input port. A transmitter (59) provided with a self-contained power supply (48) and a switch (88) propagates the encoded signal. The signal processor and the transmitter are below ground at a location beyond the expected ending location of the ISV process. A signal receiver (82) and a decoder (84) are located above ground for receiving the encoded signal popagated by the transmitter, decoding the encoded signal and providing a human-perceptible indication of the progress of the ISV process.</p> |
