MASS FLOW METER FOR FLOWING MEDIA, EQUIPPED WITH CORIOLIS FORCE MEASURING SYSTEMS

摘要

the mass flow meter of the invention includes at least one tubular loop (1) which is fixed by its two arms (2) to a support (3) and the block is provided with an oscillation generator (4) and (5), lateral sensors which convert the mechanical oscillations of the buckle (1). n electrical signals, analog of the alternating voltage.an electronic circuit with two channels is attached to the mass flow meter, which circuit is formed from alternating voltage signals of a measurement signal proportional to the mass flow. in order to improve the measurement accuracy of the cartesian components, we determine the vector signals and are evaluated in conjunction with a digital fourier transform.the magnitudes of these at a time which are converted to digital values for continuous measurement, by means of an analog to digital converter (12), on the basis of the alternating voltage signals with a predetermined sampling frequency.they are then sent to a computer, which makes the digital values to a fourier transform by multiplying the sine and cosine values corresponding to the sample, and adding these products according to a fourier transform.the microcomputer (14) provides a sampling frequency that is a multiple of the frequency of the alternating voltage control signals, and the sampling in such a way that the products stored within a predefined period are completed continuously, each. a sample of the product and that the product is the oldest in the computer is removed.