For all mobile multi-channel NVH measurements, dynamic signal analysis as well as demanding data acquisition and monitoring applications, m+p international presents the new VibMobile hardware.
Featuring multi-ranging AC and DC power supply including an on-board battery, the front-end is ideal for portable use in the field or mounted in vehicles as well as for use in the lab. A wide choice of m+p proprietary analogue I/O boards are available for;
-high-speed data acquisition
-signal conditioning for voltage inputs
-IEPE sensor supply
-DSP powered real-time processing
Alongside these, up to four CompactPCI® Serial boards can be used additionally in the mainframe, allowing for the free selection of industry standard I/O, interface and storage solutions. The m+p VibMobile can be used as a front-end together with a remote PC/laptop or standalone by having all application software installed on the powerful embedded CPU with a monitor, keyboard and mouse connected directly to the CPU.
For very high channel counts and distributed measurements over long distances, several mainframes in a master-slave configuration can be used and all of them with precise synchronization by the master clock. The daisy-chained master-slave configuration makes it possible to place the front-ends close to the measuring points, resulting in reduced transducer cabling and much higher measurement quality. Fully synchronized, precise data from all devices are transferred via GBit Ethernet lines to the host PC and stored consistently in one measurement file.
There are two analogue and digital I/O boards and signal conditioning for NVH test and measurement applications available. These are sigma-delta A/D converters, 102.4 or 204.8 kHz sampling rate, each with 8 channels, configurable input architecture and gain as well as multiple clocking and trigger options. The switchable input voltage ranges provide improved sensitivity for very low level vibration signals and microphone measurements as well as higher voltage sources such as tacho sensors. 24-bit resolution, full anti-aliasing protection and more than 120 dB spurious free dynamic range make these digitizers high-precision instruments for measurements in frequency ranges up to 40 or 80 kHz. The channel type can be switched between full differential and single-ended, thus enabling potential-free measurements. Other functions include TEDS support, IEPE sensor conditioning, cable-break and overload detection.
The VibMobile Front-End can also be used to measure strain and connection of eight strain gauges in full-, half-, or quarterbridge configurations are possible. Up to 64 channels, all precisely synchronized, can be connected to one m+p VibMobile. Robust, reliable LEMO connectors are used for the 6-pin wiring.
The 24-bit D/A converter provides four analogue outputs for vibration testing or modal analysis applications requiring drive signals for shakers. Control circuitry is implemented on all source channels for a controlled shutdown of the output voltage signal in case of emergency or power failure ensuring safe operation of the test system.
Tacho inputs with 32-bit high-speed up/down counters allow for rotating machinery testing. Digital inputs and digital outputs support various testing tasks such as combined environmental tests (climatic chamber control) or parallel functional tests.
In the near future, m+p international plans to add yet further I/O boards, to offer greater integration with a wider range of applications. For special requirements the m+p VibMobile has four slots of the industry-standard CompactPCI® Serial bus for freely selectable, 3rd party boards like mega-sampling high-speed transient recorders, GPS receivers, RS-232 or RS-485 serial interfaces, Fieldbus, CANbus, IRIG or ARINC time protocol interfaces and also fixed or removable disc modules with terabytes of storage space. We offer a selection of these boards as standard solutions, supported by our application software suites. Other boards may require a tailor-made solution which can be integrated on demand.
The conditions under which you have to take measurements are sometimes tough. The robust steel housing qualifies the m+p VibMobile for operation under harsh ambient conditions and for high ambient temperatures. Aside from this, Lightweight polyurethane side panels provide extra protection if you carry your device. For very high shock and vibration exposure, for example during test runs in vehicles, we offer a shock-isolated mount in a strong steel box which has vapour-tight front and rear covers – also perfect for protected transport to the site.
For further information on the VibMobile or to organise a free no obligations demonstration, please get in touch with m+p international UK on 01420 521 222 or visit www.mpihome.com.