Weighing device with spectral analysis
AssigneeV-Zug AG
InventorsClemens HERLITZIUS, Brian Edwin PINK, Hilmar MEIENBERG
Life of this patent
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Abstract
The invention relates to a weighing device, e.g. for kitchens. It has a support plate (1) for receiving the object to be measured and a controller (16). Furthermore, an excitation element (12) for generating mechanical vibrations in the support plate (1) and a measuring element (14) for measuring the mechanical vibrations of the support plate (1) are provided. The excitation element (12) and the measuring element (14) are used to determine one or more resonance frequencies and/or other spectral characteristics of the support plate (1), and this is used, for example, to determine the mass of the object.
Claims30
A weighing device, for weighing an object comprising
- a support plate for receiving the object
- a controller,
- at least one excitation element for generating mechanical vibrations in the support plate, and
- at least one measuring element for measuring the mechanical vibrations,
- wherein the weighing device is adapted to
- using the excitation element and the measurement element to determine at least one spectral characteristic of the vibrations, and
- using the spectral characteristic to determine a mass of the object.
The weighing device of claim lwherein the weighing device is adapted to determine spectral characteristics of a given set of modes, and wherein at least one of the excitation element and the measurement member is arranged at a location of the support plate where the oscillation amplitudes of all of the modes of the set of modes is at least 25% of a maximum oscillation amplitude of the respective mode.
A method of operating a weighing device for weighing an object, wherein the weighing device comprises a support plate, at least one excitation element, and at least one measuring element, wherein the method comprises at least the following steps:
- generating mechanical vibrations in the support plate by means of the excitation element,
- measuring at least one spectral characteristic of the vibrations with the measuring element, and
- using the at least one spectral characteristic of the vibrations to determine a mass of an object on the support plate.
A method for vessel by means of a weighting device, wherein the weighing device comprises a support plate, at least one excitation element, and at least one measuring element,
- wherein the method comprises at least the following steps:
- placing the vessel on the support plate,
- generating mechanical vibrations in the support plate by means of the excitation element,
- measuring at least one spectral characteristic of the vibrations with the measuring element, and
- using the at least one spectral characteristic of the vibrations to determine a mass of an object on the support plate.
A weighing device comprising
- a rectangular or square support plate,
- at least one excitation element for generating mechanical vibrations in the support plate, and
- at least one measuring element for measuring the mechanical vibrations,
- a controller adapted to
- using the excitation element and the measurement element to determine at least one spectral characteristic of the vibrations, and
- using the spectral characteristic to determine a mass of the object.
Dependencies are inferred from the claim text.