DS-3000 Frequently Asked Questions

The "velocity" measured by Laser Doppler Vibrometer the first derivative, and then further calculated and displayed as "gravitational acceleration".
Here, we'll display the "gravitational acceleration" value in the third graph from the top, using a three-screen display.

 

We perform calculations on the second graph from the top (the power spectrum of velocity) to obtain the power spectrum of gravitational acceleration.
The results will be displayed in the third graph from the top. Therefore, we "select" the third graph.
We will perform the first derivative and calculation using the symbolic computation function. After the calculation, the unit will be set to "G".

 

 

The third graph from the top is the power spectrum of gravitational acceleration.

 

 

※1 9.8 を 2回 割り算している理由

 

The power spectrum is a quantity with dimensions equal to the square of a certain physical quantity (such as acceleration, velocity, or displacement). When converting its units, it is necessary to deal with the square of the converted value. Specifically, when converting from m/ ^s² to G, you need to divide by ² (9.8).

(For reference) The FDIFF operation also involves multiplying by (2πf) ^².
I want to determine the mechanical impedance using the DS-3000 impulse hammer (force sensor) and Accelerometer.