Vibration type transducer
First Claim
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1. A vibration type transducer comprising:
- a vibrator,vibration drive means for vibrating said vibrator in at least two vibration modes,at least two vibration detection means for detecting frequency signals corresponding to said vibration modes of said vibrator,an adder circuit coupled to said vibration detection means for adding said frequency signals of said vibration detecting means,a subtracter circuit coupled to said vibration detection means for subtracting said frequency signals of said vibration detection means, andan arithmetic circuit coupled to said adder circuit and said subtracter circuit for providing an output signal corresponding to a physical quantity to be measured.
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Abstract
A vibration type transducer is provided in which various physical quantities, for example, the pressure, density, force and temperature are measured from the natural frequencies of the mechanically vibrated vibrator.
The vibrating element is vibrated in a plurality of vibration modes and a plurality of resultant frequency signals are processed to obtain signals associated with the various physical quantities. The system is not influenced by physical quantity other than the physical quantity to be measured.
39 Citations
8 Claims
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1. A vibration type transducer comprising:
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a vibrator, vibration drive means for vibrating said vibrator in at least two vibration modes, at least two vibration detection means for detecting frequency signals corresponding to said vibration modes of said vibrator, an adder circuit coupled to said vibration detection means for adding said frequency signals of said vibration detecting means, a subtracter circuit coupled to said vibration detection means for subtracting said frequency signals of said vibration detection means, and an arithmetic circuit coupled to said adder circuit and said subtracter circuit for providing an output signal corresponding to a physical quantity to be measured. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification