摘要:
Die Vorrichtung zur Trockenlauferkennung einer Pumpe weist einen Ultraschall-Wandler (8) auf, welcher zur Anordnung in einem Pumpengehäuse (24) ausgebildet ist mit einem Frequenzgenerator (2) zur Erzeugung eines elektrischen Signals mit vorgegebener Frequenz elektrisch verbunden ist. Eine Analyseeinheit (10) der Vorrichtung analysiert das an dem Ultraschall-Wandler (8) anliegende elektrische Signal und ist dazu ausgebildet, den Kontakt des Ultraschall-Wandlers (8) mit einer Flüssigkeit oder nicht auf Grundlage des Signalpegels des elektrischen Signals zu detektieren.
摘要:
The invention relates to a method and system and microchip for determining impedance of a variable impedance component. The method comprises tuning a tunable oscillator over a predefined tuning range, the tunable oscillator having the variable impedance component coupled as a load thereof. The frequency response of the tunable oscillator is measured as a function of said tuning. Finally, the measured frequency response is analyzed for determining the impedance of the variable impedance component. The invention makes possible to manufacture smaller and simpler monolithic sensor microchips.
摘要:
The invention relates to a method and system and microchip for determining impedance of a variable impedance component. The method comprises tuning a tunable oscillator over a predefined tuning range, the tunable oscillator having the variable impedance component coupled as a load thereof. The frequency response of the tunable oscillator is measured as a function of said tuning. Finally, the measured frequency response is analyzed for determining the impedance of the variable impedance component. The invention makes possible to manufacture smaller and simpler monolithic sensor microchips.