The CF-4700 FFT comparator is an ideal line judgment machine for precise quality inspection of products based on sound and vibration. By incorporating our long-cultivated frequency analysis technology using FFT, it extracts characteristic frequency components that may be problematic and makes pass/fail judgment.
In addition to the frequency component magnitude and waveform shape judgment functions found in the current CF-4500 model, this new model features a variable component extraction function that extracts the amount of fluctuation in periodically fluctuating sounds and vibrations and makes judgments based on that fluctuation amount. This function judges based on the amount of fluctuation in sounds and vibrations that fluctuate periodically, rather than the frequency level. For example, it can determine whether a motor-driven device produces a "squeaking" or rattling noise. Furthermore, it can monitor bearing vibrations using the bandpass filter and envelope functions included in the variable component extraction function, and also perform auditory confirmation by making vibrations audible through the monitoring function (headphone output).
Furthermore, for users who are just starting to use frequency spectrum-based judgment, we have newly added a judgment assist function that allows you to easily set the judgment range. It reads the difference in sound and vibration levels from the measurement data files for pass and fail and sets the judgment block, so even customers who are using frequency spectrum-based pass/fail judgment for the first time can easily set the block.
[Features] Four comparison functions determine the quality of the product.
A block comparator function that sets a judgment area and determines pass/fail based on the level of characteristic frequency signals.
Shape comparator function (optional) that determines pass/fail based on the waveform shape.
Tracking function (optional) that determines pass/fail status based on level changes of a specific order by varying the rotation speed.
A variable component extraction function (optional) that extracts the amount of variation in sound and vibration caused by periodic fluctuations such as humming and rattling to determine whether the system is pass or fail.
A judgment assist function that sets judgment blocks based on the difference in frequency characteristics between good and defective products.
Supports TEDS sensors for automatic unit calibration (compatible with Accelerometer and microphones in versions 0.9 and 1.0).
Power backup prevents loss of measurement data during power failure (optional).
