| 摘要 |
<p>An apparatus for detecting a fluid level is disclosed, which includes a coaxial sensor (1302) having a pair of conducting tubes positioned with respect to each other in spaced coaxial arrangement, a coaxial transmission line (502) connected to the sensor, a means (1301) for injecting a standing wave into the coaxial sensor, a summer (1320, 1321, 1322) for summing the injected wave and a reflected wave connected to the sensor, a means for adjusting (1305) the frequency of the injected wave in response to the voltage and phase of the summed signal, and a processor (1311) for processing and displaying the frequency as a representation of the level of the fluid. A method for detecting the fluid level is also disclosed.</p> |
