Acceleration Pickup Frequently Asked Questions

It is recommended to use small accelerometer pickups such as the NP-2110 or NP-3210 (approximately 6 Φ). As you know, due to the contact conditions of the pickup, there can be contact resonance and damping, making it difficult to detect high frequencies. (For frequency characteristics related to installation, please refer to the instruction manual.) To measure accurately, it is essential to ensure that the pickup is closely attached and securely fixed.

Based on this;

(1) Fix the pickup with screws, instant adhesive, etc.
(2) Securely fix the metal jig such as bolts and attach the pickup to its head with instant adhesive.
(3) Install the pickup so that the entire unit is covered with curing material.
(4) Fix it with embedded curing material.

It can be considered, but there is a possibility that the pickup cannot be reused, so careful consideration is necessary.

Additionally, although I believe measurements have already been taken, how about observing the frequency characteristics using a square block of the same material to keep a record of the material's vibration transmission properties? In practice, there are limitations at high frequencies, and it may not be that they cannot be measured, but rather that such frequencies are internally damped, suggesting that high frequencies may not exist.

Other methods to consider include non-contact measurements using the LV series Laser Doppler Vibrometer and displacement gauges.