A device for measuring a force of the type a vibrating body, applicable to a system of weighing

摘要

Device for measuring a force, which comprises an oscillator 20 acting in response to a force in order to generate a first electric signal whose frequency f varies as a function of the force with which it is wrapper, means 22 for measuring the frequency of said first electric signal, and means for calculating the amplitude of the wrapper force using the value measured of said frequency, this device being characterizes in that the means for measuring the frequency comprise a second oscillator 24 in order to generate a second electric signal d having a fixed frequency f which is more high that the frequency f of said first electric signal, the counting means 28 for counting the number of cycles of the said second electrical signal, for a period of time which corresponds to a predetermined number of cycles of the said first electric signal, and means arithmetical 30 to calculate the frequency of said first electric signal from the value of the account of the counting means of the account predetermined of cycles and the frequency of the second electric signal. / p & & p & application is a system of weighing.