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A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli

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The Application of Back-to-Back Accelerometers to Precision Vibration Measurements.

¹National Bureau of Standards, Washington, DC 20234.

Journal of Research of the National Bureau of Standards (1977)

|September 27, 2021

Summary

Accurate vibration measurements require reliable calibration. Improved laser interferometric calibration methods enhance the back-to-back accelerometer

Keywords:

accelerometers calibration exciters shakers standards vibration

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Area of Science:

Metrology
Mechanical Engineering
Instrumentation

Background:

Precision vibration measurements rely on accurate and repeatable calibration.
The back-to-back accelerometer is a widely used laboratory standard, but its utility is limited by inadequate calibration methods.
Standardization of calibration equipment and techniques is crucial for measurement accuracy.

Purpose of the Study:

To present recent developments in improved calibration methods for the back-to-back accelerometer.
To enhance the accuracy and repeatability of vibration measurements using the back-to-back accelerometer as a standard.
To adapt laser interferometric calibration techniques for the specific geometry of back-to-back accelerometers.

Main Methods:

Adaptation of laser interferometric calibration techniques to the back-to-back accelerometer's geometry.
Development of improved calibration methods to address limitations of existing techniques.
Presentation of recent work conducted at the National Bureau of Standards (NBS).

Main Results:

Achieved improved accuracy in calibration over existing methods for the back-to-back accelerometer.
Demonstrated potential for calibration within the frequency range of 2-15,000 Hz, with possibilities for extension to 20,000 Hz.
Provided a description of a sample back-to-back transducer calibration.

Conclusions:

The back-to-back accelerometer, with enhanced calibration methods, has significant potential as an accurate, repeatable, and stable vibration standard.
These advancements will benefit laboratories involved in vibration measurements and transducer calibrations.
Laser interferometric calibration offers a pathway to improved accuracy for vibration transducer standards.