Corvus Options

There are several powerful options available for Corvus to assist you in achieving your measurement task.

Data is acquired and stored in a cyclic function on disk memory until a ring buffer trigger event is registered. A triggered event could be manual, timed or a channel alarm amplitude level crossing or skyline alarm. Then a predefineable posttrigger timer is decremented to zero and then stops the data storage. Thus the ringbuffer can be divided in pre- and posttrigger domains. Data recorded before the start of the posttrigger counter is in the pretrigger domain, data recorded after the start of the counter is in the posttrigger domain. The size (time) of the pre- and posttrigger domain can be set by the user from 1s to 1h each. Ring buffer trigger events can be generated manually or when signal alarms are detected.

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Allows you to create timing or a sequence of conditions to trigger and control data storage.The example below utillises two methods of data storage to store data during an alarm event.The trigger event shown is a simple level crossing alarm indicated by a red line. The measured data is displayed as a black solid trace.In this case when the channel alarm level is exceeded a ring buffer storage with a preand post time of 5 seconds is triggered, a one shot measurement is made at the maximumvalue of the measurement period. After the maximum value no further trigger will occureuntill the signal value falls below the arlarm threshhold level where the ring buffer storage function will be initialised ready for the next event.

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The standard Corvus software uses a block mode storage method. This method is satisfactory for a wide range of applications but there can be a small break in the data stored between blocks. If unbroken data streaming is required then the Streamed Data Storage is the answer. This is also the case on certain types of data acquisition tasks, typical examples are Rotor Speed Tracking (Order Analysis) and Speed Triggering.

Specification Highlights

 

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Allows you to quickly set up and carry out impact Modal testing. A pre-configured Impact Test Panel will display Transfer Function, Phase and Coherence. Overload monitoring and acceptance of the last impact performed gives you the ability to decide to include your last result in the average. A full curve fitting and damping calculation function is available and export to popular modal packages is available.

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One of the most advanced software packages when carrying out order tracking. A very special Campbell diagram is available which allows you to display frequency components in "needle" form a much more accurate method than the traditional circle method. Curve fitting of resonances allows stress/strain calculations. Full machine order tracking is included with bode plots and waterfall display.

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Corvus is ELSTAR'S general purpose, highly scalable vibration signal analyser.

We have put together a series of packages for Corvus. These are intended as a guide, as Corvus supports a wide range of National Instruments hardware you can configure your system to exactly suite your measurement requirements.

View Corvus Packages

Corvus Supported Hardware

Please click Corvus-7-Supported-Hardware.pdf to download list of hardware supported by Corvus.

Corvus supports a wide range of National Instruments Signal sources as well as:

  • Digital interface to Datatel telemetry systems thus eliminating the need for converting data from Digital to Anallog and then back to Digital format.
  • Interface to HBM QuantumX amplifier.
  • Argus data aquisition System.