BEAR more info
Band energy is a simple yet effective way to monitor and trend the evolving condition of most manufacturing equipment. The vibration signature of a complex machine can provide a reliable monitoring of its condition health. For example, frequencies of interest may include those of a drive or multiple drives, gearboxes, rolls, spindles and/or self-excited chatter frequencies. By monitoring and trending certain critical bands, problems are detected in advance, equipment maintenance costs are minimized and machinery life maximized.
Traditionally, vibration diagnostic professionals used manual data collection methods with portable data collectors. These "walk around" routes for critical monitoring points were attended to on a scheduled basis, often monthly or even quarterly. In addition to the infrequent visits, the disadvantages of manual data collection include:
- Generally requires production to be stopped to get an idle steady state condition signature
- Often measurements are neglected or done improperly
- Idle data does not provide complete machine health information
- Requires human involvement, an expensive process in a potentially hazardous environment
Eliminating all these disadvantages, the BEAR can be permanently installed, providing cost-effective on-line machine health monitoring. The BEAR provides alarm capability based on frequency or order bands as well as data logging capability that stores overall and frequency (or order-normalized) band data. Either time histories or auto-power spectra can be stored for further evaluation. A series of overall and band data provides information that is crucial for trending, while block data (either time or auto-power spectra) provides for detailed root-cause analysis.
BEAR accomplishes these benefits using the proven and flexible LanSharc (SDC003) hardware and software technologies. Meeting tough industrial requirements such as NEMA 4 and CE, the unit houses state-of-the-art 24-bit delta-sigma analog-to-digital conversion, 32-bit floating point DSP with 180 MFLOPS of processing performance, 16MB (expandable to 32 MB) of SDRAM, and 4MB of flash file system. The BEAR can be installed as a stand-alone, autonomous module, or as a PC-based controller connected via Ethernet. The controller runs a full-blown MS Windows operating system such Windows 2000, which provides remote access via Internet, resulting in automatic remote setup, alarming and monitoring.
Currently installed and monitoring a variety of production processes, the LanSharc hardware has already proven its capability and value at some of the world's leading automotive companies, automotive suppliers and steel manufacturers.
BEAR firmware provides measurement of overall vibration level, but also includes:
- 10 frequency or order-referenced alarm bands with four different alarm levels for each band, which allows monitoring 10 different fault frequency bands
- Up to 10 harmonic comb bands for each spectral band mentioned above - expandable up to 30 harmonics, which allows up to 10 (expandable to 30) harmonics of each fault frequency
- Band limit, configurable in acceleration-rms, acceleration-peak, velocity-rms, and velocity-peak.
The standard LanSharc™ hardware provides:
- Up to 4 dynamic inputs to monitor vibration signals such as ICP® accelerometers
- 4 static inputs to monitor process parameters such as temperature and pressure
- 1 digital input for external event trigger
- 1 tachometer input for machine speed measurement
- 4 solid-state relay outputs for trip-off or PLC
BEAR GUI software provides easy-to-use:
- Graphical interface to setup hardware
- Summary view
- Trend plot
- Spectrum or time plot
- Export data
BEAR can also provide the following options:
- Alarm limit learning, based on statistics
- Catastrophic data logging
- Narrowband spectral alarm envelope
- Network capable cluster configuration
- Visualization and analysis software for root-cause analysis and report generation
With the capability to measure dynamic vibration signals and static process signals at the same time, BEAR excels at monitoring complex machines using speed-dependant alarm bands. Additional bands centered on multiples of harmonics of the fault frequencies allow early detection of machine defects. With this automated band limit detection and remote access capability, the BEAR reduces the labor needed to gather machinery vibration signatures and can simplify diagnosis for vibration specialists on-site. External triggering and 4 relay outputs make the monitor process-friendly with existing PLC or SCADA systems.
- Typical Applications
Cooling Tower Drives
- Blowers (Fans)
- Chillers - Reciprocating & Centrifugal
- Centrifugal Pumps
- Vertical Pumps
- General Purpose Horizontal Pumps
- Boiler Feed Pumps
- Hydraulic Pumps
- Rotary Screw
- Machine Tools
- Gearbox input
- Gearbox output
- Spindles: Roughing Operations, MachineFinishing, & Critical Finishing
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