Patent ID: 7966881

Claim:
An arrangement for detecting a first resonance frequency, associated with a carrier means loaded with an added mass, and comparing said first resonance frequency with a second resonance frequency, associated with said carrier means without the added mass, in order order to evaluate, based on a noted resonance frequency shift, the mass and/or weight of the added mass, comprising: (a) an array of individual carrier means in which the individual carrier means are adjacent to each other, wherein one or more of said individual carrier means are characterized by different second resonance frequencies, and wherein the individual carrier means are simultaneously illuminated, and (b) a receiving and/or calculating unit that is configured to simultaneously detect a total reflected signal comprising a number of first resonance frequencies received from said loaded carrier means, thereby allowing carrier means' resonance frequencies to be detected simultaneously in a frequency domain, wherein said first resonance frequencies are compared and/or calculated within said receiving and/or calculating unit with corresponding second resonance frequencies stored in said unit, and wherein the arrangement detects a first resonance frequency, associated with a carrier means loaded with an added mass, and compares said first resonance frequency with a second resonance frequency, associated with said carrier means without the added mass, in order to evaluate, based on a noted resonance frequency shift, the mass and/or weight of the added mass.