Measuring system having electromechanical resonators, method for manufacturing such a system, and method for reading at least two electromechanical resonators
First Claim
1. A measuring system, comprising:
- at least two electromechanical resonators, each having a resonant frequency varying around an offload resonant frequency according to a physical quantity to be measured, each resonator including;
an input configured to receive an excitation signal,an output configured to supply an output signal in response to the excitation signal, the output signal having resonance at the resonant frequency of the resonator, anda mechanical structure defining the offload resonant frequency, the mechanical structures of the resonators being different from one another so that the offload resonant frequencies are different from one another, all inputs of the resonators being connected together to receive a same excitation signal;
an adding device for adding the output signals as a total output signal,a memory in which is recorded, for each resonator, offload resonance information relating to the offload resonant frequency of the resonator,a reading device configured to determine the resonant frequency of one resonator selected for reading,wherein the reading device is configured to receive the total output signal,wherein the reading device includes a closed-loop configured to supply an excitation signal to the resonators according to the total output signal,wherein, for determining the resonant frequency of the selected resonator, the reading device is configured to configure, before reading, at least one element of the closed-loop from the offload resonance information stored for the selected resonator, andwherein, for determining the resonant frequency of the selected resonator, the closed-loop with the configured element is configured to attach, after a time, to the resonant frequency of the selected resonator.
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Accused Products
Abstract
A measuring system including: at least two electromechanical resonators each having a resonant frequency varying around an offload resonant frequency according to a physical quantity to be measured; at least one reading device connected to inputs of the resonators and configured to supply an excitation signal on the inputs; and a memory in which is recorded, for each resonator, offload resonance information relating to the offload resonant frequency of the resonator. Each reading device is configured to determine the resonant frequency of one or more resonators selected for reading by configuring at least one element of the reading device using the offload resonance information stored for each selected resonator.
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Citations
19 Claims
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1. A measuring system, comprising:
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at least two electromechanical resonators, each having a resonant frequency varying around an offload resonant frequency according to a physical quantity to be measured, each resonator including; an input configured to receive an excitation signal, an output configured to supply an output signal in response to the excitation signal, the output signal having resonance at the resonant frequency of the resonator, and a mechanical structure defining the offload resonant frequency, the mechanical structures of the resonators being different from one another so that the offload resonant frequencies are different from one another, all inputs of the resonators being connected together to receive a same excitation signal; an adding device for adding the output signals as a total output signal, a memory in which is recorded, for each resonator, offload resonance information relating to the offload resonant frequency of the resonator, a reading device configured to determine the resonant frequency of one resonator selected for reading, wherein the reading device is configured to receive the total output signal, wherein the reading device includes a closed-loop configured to supply an excitation signal to the resonators according to the total output signal, wherein, for determining the resonant frequency of the selected resonator, the reading device is configured to configure, before reading, at least one element of the closed-loop from the offload resonance information stored for the selected resonator, and wherein, for determining the resonant frequency of the selected resonator, the closed-loop with the configured element is configured to attach, after a time, to the resonant frequency of the selected resonator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19)
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15. A method for sizing electromechanical resonators, the method comprising:
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determining, for each resonator, an expected maximum variation range of its resonant frequency around its offload resonant frequency; and choosing mechanical structures that define offload resonant frequencies of the resonators in a manner such that the offload resonant frequencies are substantially separate from one another in order for the determined ranges to be non-overlapping.
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16. A method for reading at least two electromechanical resonators each comprising a mechanical structure defining an offload resonant frequency, the mechanical structures of the resonators being different from one another so that the offload resonant frequencies are different from one another, and each having a resonant frequency varying around the offload resonant frequency according to a physical quantity to be measured, each resonator including an input configured to receive an excitation signal and an output configured to supply, in response to the excitation signal, an output signal, the output signal having a resonance at the resonant frequency of the electromechanical resonator, all inputs of the resonators being connected together to receive a same excitation signal and the output signals being added as a total output signal by an adding device, the method using a reading device comprising a memory
in which is recorded, for each resonator, offload resonance information relating to the offload resonant frequency of the resonator and a closed-loop configured to receive the total output signal and supply an excitation signal to the resonators according to the total output signal, the method comprising: -
selecting, from the resonators, one resonator to be read; recovering from the memory, the offload resonance information of the selected resonator; applying an excitation signal to the resonators using the closed-loop; determining the resonant frequency of the selected resonator by configuring, before reading, at least one element of the closed-loop from the offload resonance information stored for the selected resonator, such that the closed-loop with the configured element is configured to attach, after a time, to the resonant frequency of the selected resonator; and determining the physical quantity from the resonant frequency determined and the offload resonant frequency of the resonator. - View Dependent Claims (17)
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Specification