The VP106 from Anthony Best Dynamics, together with the Plato noise/vibration analysis system, sets new standards for high speed, high-accuracy, portable noise/vibration ("NVH") measurement & analysis.
Practical Features for Practical Measurements
The VP106 includes four operating modes. In Mode A, any sensors you connect are routed directly to the on-board National Instruments USB-4432 five-channel 24-bit DAQ, which is powered from your computer's USB-port. So, no need to provide external power, connect your sensors, activate the IEPE-sensor powering available from the USB-4432 and start taking data with ABD's world-renowned Plato NVH measurement & analysis system.
OK, so we can hear you saying, "why do I need any other modes?". The answer is flexibility, especially if you are using microphones to measure radiated noise. The USB-4432 device boosts impressive 24-bit sampling, but it does not include any signal amplification (gain). IEPE-microphones (with built-in pre-amplifiers) can be powered by the USB-4432, but sensitivities are typically less than 50mV/Pascal. In other words, a noise level of 94dB re 20micro-Pascal will generate an unamplified signal of just 50mV. The input range of the USB-4432 is +/-40V, so a 50mV signal occupies only 0.125% of the available sampling range (reducing the 24-bit sampling range to an effective 14-bits!) VP106 modes B, C and D, therefore provide amplification to allow the level of such small signals to be boosted, thereby utilizing more of the available sampling range. The result is higher-fidelity noise sampling. Also, although IEPE-accelerometer sensitivities can usually be selected for the measurement task in-hand, the x1, x10 and x100 gain options in mode C are also useful for sampling range optimization when using accelerometers. VP106 modes B1 and B2 support cost-effective (CEL) microphones. Based on robust dosimeter technology, these microphones are able to stand the rigours of portable/in-vehicle noise measurement, and they are also "short and stubby". This makes them ideal for integration into ABD's MS108 microphone hat - the ideal single solution for in-vehicle noise assessments in the driver position. VP106 modes B1 and C also provide comprehensive tachometer ("tach") signal conditioning, with up to 12V available for powering tach sensors if required. Tach signals of up to +/-200V can be clamped down to a useable TTL-level, allowing magnetic/inductive sensors (as can also be supplied by ABD) to be used with ease.