| 摘要 |
The proposed capacitive level meter for liquid contains a cylindrical capacitive transducer with an outside electrode and an inside electrode, a regulated voltage source, an amplifier, an oscillator, two triggers, a phase comparator, a time delay element, and a transistor switch. The inside electrode is connected to the input of the comparator. The output of the comparator is connected to the input of the first trigger. The output of the first trigger is connected to the input of the second trigger via the time delay unit. The noninverting output and the inverting output of the second trigger are connected to the corresponding inputs of the switch. The electronic elements of the meter are realized as an integrated circuit.
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