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Owning Palette: Weighting and Integration VIs

Installed With: Sound and Vibration Measurement Suite

Converts acceleration to velocity or displacement. The data type you wire to the scaled signal [EU] input determines the polymorphic instance to use.

Details  

Use the pull-down menu to select an instance of this VI.

Select an instance SVL Integration (1 Ch)SVL Integration (N Ch)

SVL Integration (1 Ch)

	length units should be used to specify the desired units for length in the integrated spectrum. Use this parameter to change the base units for the integrated spectrum. no change m (default) mm micron in mil
	scaled signal [EU] specifies the scaled signal expressed in the selected engineering units. To obtain a properly scaled signal, you can use the SVL Scale Voltage to EU VI or define a virtual channel in National Instruments Measurement & Automation Explorer (MAX). t0 is the start time of the waveform. dt is the time interval in seconds between data points in the waveform. Y contains the data values of the waveform.
	integration type specifies the type of integration to perform. 0 Single integration—Returns the velocity if the input is acceleration. 1 Double integration (default)—Returns the displacement if the input is acceleration.
	highpass cutoff frequency specifies the cutoff frequency for the highpass filter. Frequency components less than highpass cutoff frequency are attenuated by the highpass filter. Use this parameter if you know the lower limit of the frequency response of your transducer. For example, if you are using an accelerometer that shows poor response below 20 Hz, set highpass cutoff frequency to 20 Hz.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	reset filter specifies if the various filters used for the integration have to be reset. The default is FALSE. The filters are automatically reset the first time this VI is called.
	integrated signal returns a single-integrated or double-integrated signal.
	unit label returns the selected engineering units.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVL Integration (N Ch)

	length units should be used to specify the desired units for length in the integrated spectrum. Use this parameter to change the base units for the integrated spectrum. no change m (default) mm micron in mil
	scaled signals [EU] specifies the scaled signals expressed in the selected engineering units. To obtain a properly scaled signal, you can use the SVL Scale Voltage to EU VI or define virtual channels in National Instruments Measurement & Automation Explorer (MAX).
	integration type specifies the type of integration to perform. 0 Single integration—Returns the velocity if the input is acceleration. 1 Double integration (default)—Returns the displacement if the input is acceleration.
	highpass cutoff frequency specifies the cutoff frequency for the highpass filter. Frequency components less than highpass cutoff frequency are attenuated by the highpass filter. Use this parameter if you know the lower limit of the frequency response of your transducer. For example, if you are using an accelerometer that shows poor response below 20 Hz, set highpass cutoff frequency to 20 Hz.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	reset filter specifies if the various filters used for the integration have to be reset. The default is FALSE. The filters are automatically reset the first time this VI is called.
	integrated signals returns an array of single-integrated or double-integrated signals.
	unit labels returns the unit label for each channel.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVL Integration Details

The SVL Integration VI uses digital filters to integrate the input signal, a lowpass filter with a known rolloff to do the actual integration and a highpass filter to remove the DC component from the signal. If you know the lower limit of the frequency response of your transducer, use the highpass cutoff frequency parameter.