CF-5200 Frequently Asked Questions

When the acceleration signal is a very small voltage signal, double integration can result in the DC component and very low frequency components becoming relatively large compared to the signal itself. As a result, depending on the input signal, the double integrated data may appear parabolic or trend upwards or downwards.

Therefore, it is necessary to increase the voltage signal when inputting it into the FFT analyzer and to minimize the DC component and very low frequency components. As a practical solution, please use an analog integrator to convert the displacement signal into a sufficiently large voltage for input into the FFT analyzer.

In double integration, the calculation involves h2, and since h is a small value, the result becomes very small. The parabolic shape of the double integral corresponds to the addition of the DC component (offset), within which there is a minute AC component (fluctuation). Auto-scaling is influenced by the DC component, making it unsuitable for scaling according to the AC component. To observe the AC component, one must zoom in using manual scaling, but it is quite difficult to obtain the expected displacement waveform from the acceleration waveform, resulting in a challenging situation. (It does not have a function to remove low-frequency and DC components after integration.)