Weighing device with spectral analysis

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,
• wherein the controller is adapted to
• determining at least two different spectral characteristics of the oscillations,
• using the at least two spectral characteristics to determine the mass of the object, and
• use at least two spectral characteristics to determine or eliminate at least one further unknown parameter of the object.

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,
• wherein the support plate has a stiffened region, wherein a stiffness of the support plate inside the stiffened region is greater than outside.

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,
• wherein the controller comprises a neural network to which spectral characteristics are fed, and which has been trained to determine therefrom at least the mass of the object on the support plate.

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,
• wherein the support plate is rectangular or square and wherein at least one of the excitation element and the measuring element is arranged, within a tolerance T, on at least one diagonal of the support plate, wherein the tolerance T is at most 10% of a shorter side length of the support plate, and
• wherein at least one of
• a distance D1 of the excitation element from a center of the diagonal and
• a distance D2 of the measuring element from the center of the diagonal lies in a range between 5% and 45% of the length L of the diagonal, and
• wherein the excitation element and the measuring element are arranged on different diagonals and wherein a control panel is arranged between the excitation element and the measuring element beneath the support plate.

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,
• wherein the weighing device further comprises a plurality of measuring elements at different positions, and
• wherein the controller is adapted to determine an amplitude ratio and/or a phase shift between signals of the measuring elements at the resonant frequency.