Traceability of vibration and shock measurements by laser interferometry

Martens, Hans-Jürgen von; Täubner, Angelika; Wabinski, Wolfgang; Link, Alfred; Schlaak, Hans-Joachim

doi:10.1016/s0263-2241(00)00003-8

Cited by 33 publications

(18 citation statements)

References 4 publications

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“…The ZFM will be effective not only for developing a low‐cost calibration instrument based on the LMM using a low‐cost model digitizer but also for developing a high‐precision instrument using a high‐end model digitizer. The ZFM will be effective with a combination of most of the algorithm for detecting each zero crossing, 1–3,13 such as polynomial approximation or sine curve fit, as well as linear interpolation used in the experiment described in this article.…”

Section: Discussionmentioning

confidence: 99%

“…Requirements for estimating the frequency of a single sinusoid with high resolution and high sampling rate have increased in various industrial and research applications. In the field of high‐precision mechanical measurement, such as the dynamic calibration of accelerometers 1–3 and the dynamic calibration of force transducers, 4–6 it is sometimes required to measure the Doppler frequency shift appearing at the interferometer's output port. For measuring the Doppler frequency shift, an electronic frequency counter or a digitizer, that is, a high‐speed analog‐to‐digital converter, is usually used.…”

mentioning

confidence: 99%

“…In the field of vibration measurement, 1–3 instead of electronic frequency counters, high‐speed digitizers are sometimes used to record the whole wave profile, and the period and frequency are calculated from the waveform afterward. This technique is widely used for measuring the period and the frequency of the output signal of a laser interferometer.…”

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confidence: 99%

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Frequency Estimation Method From Digitized Waveform

Fujii

Hessling²

2008

Experimental Techniques

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Frequency Estimation Method From Digitized Waveform

Fujii

Hessling²

2008

Experimental Techniques

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“…In vibration and shock calibration laser interferometer is used to measure movement and obtain traceability to SI unit [4] . Grating usually used in length and angle measurement.…”

Section: Using Circular Grating Measuring Angular Movementmentioning

confidence: 99%

Comparison of angular movement measurement using grating and laser interferometer

Peng

2008

Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

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Primary angular acceleration calibration system is developed by Changcheng Institute of Metrology & Measurement (CIMM) to generate angular vibration and shock, which are traceable to the International System of Units (SI). It can be used to calibrate angular transducers, i.e. angular accelerometer, angular velocity transducer, and rotational angle transducer. Two kinds of system are used in the measurement of angular movement, one is based on circular grating and scanning heads, another is based on laser interferometer with diffraction grating. This paper introduce the comparison results of the two measurement systems in the measurement of angular movement under sinusoidal and shock excitation. The results of the investigations show a good accordance of the newly developed method of using grating and scanning heads measuring angular acceleration in comparison with the laser interferometer method.

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“…Increasing the measurement accuracy of acceleration Using laser interferometer instead of acceleration transducer to measure acceleration has several advantages. First, it is an absolute measuring method, which is used in national acceleration standards with the best accuracy [3] . Second, it is a noncontact measuring method which eliminates the mass of acceleration transducer from the total mass and the system acceleration distribution is simplified.…”

Section: Introductionmentioning

confidence: 99%

Research on new dynamic force calibration system

Zhang

2008

Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

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Sinusoidal force calibration method based on electrodynamic shaker and interferometric system was studied several years before at Physikalisch-Technische Bundesanstalt (PTB). In that system a load mass are screwed on the top of force transducer, the sinusoidal forces realized by accelerated load masses are traceable to acceleration and mass according to the force definitionwhere m is the total mass acting on the sensing element of the force transducer and a is the time and spatial-dependent acceleration of the mass, which is directly measured by a laser interferometer. This paper will introduce a new dynamic force calibration system developed at Changcheng Institute of Metrology and Measurement (CIMM). It uses electrodynamic shakers to generate dynamic force in the range from 1N to 20kN, and heterodyne laser interferometers are used for acceleration measurement. A new air bearing system is developed to increase the performance of shakers and an active vibration isolator is used to reduce enviromental disturbance to the interferometric system.

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Traceability of vibration and shock measurements by laser interferometry

Cited by 33 publications

References 4 publications

Frequency Estimation Method From Digitized Waveform

Frequency Estimation Method From Digitized Waveform

Comparison of angular movement measurement using grating and laser interferometer

Research on new dynamic force calibration system

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