FFT Applications
FFT Acoustic analysis
S-1-4 Quality control of wire harness device depending on the winding noise
- This example shows quality control of the harness device included in the sliding door mechanism by using the sound generated during winding the harness. Drive a motor of wire harness system in a sound insulating box and the LA-1411 Sound level meter measures the sound generated during winding the harness. Then the CF-4700A performs frequency analysis of the AC output signal from the Sound level meter to make OK/NG judgment of the partial overall level in a specific frequency band.
- Judgment area block (max: 20 blocks) is set up by the specified frequency range on the power spectrum and the upper/lower-limit levels.The most suitable judgment method can be selected from 6 kinds of judgment methods (level, peak level, peak max, insideMax, partial overall or area rate of content). The Digital I/O function also enables control by PLC* via comparator output.
- The measurement results can be stored into a PC via LAN or RS-232C interface.
Product list
| Model | Product name | Remarks | Qty | |
|---|---|---|---|---|
| 1 | CF-4700A |
FFT Comparator | 1 | |
| 2 | LA-1411 | Class 2 Sound level meter | 1 | |
| 3 | AX-501 | Output cable (2 m) | 1 | |
| 4 | SC-2500A | Sound calibrator | 1 | |
| 5 | AG-2010 | Microphone Extension cable | 10 m | 1 |