A5102969496- Advanced Measurement and Metrology Techniques
- Scientific Measurement and Uncertainty Evaluation
- Advanced Sensor Technologies Research
- Sensor Technology and Measurement Systems
- ATP Synthase and ATPases Research
- Mitochondrial Function and Pathology
- Microbial Metabolic Engineering and Bioproduction
- Optical measurement and interference techniques
- Astronomical Observations and Instrumentation
- Advanced Fiber Optic Sensors
- Geophysics and Sensor Technology
- Enzyme Catalysis and Immobilization
- Amino Acid Enzymes and Metabolism
- Peptidase Inhibition and Analysis
- Biochemical and Molecular Research
- Bacterial Genetics and Biotechnology
- Enzyme function and inhibition
- Nitrogen and Sulfur Effects on Brassica
- Advanced MEMS and NEMS Technologies
- Fermentation and Sensory Analysis
- Wastewater Treatment and Nitrogen Removal
- Urban Heat Island Mitigation
- Biochemical and Structural Characterization
- Hydraulic flow and structures
- Advanced Thermodynamic Systems and Engines
National Institute of Advanced Industrial Science and Technology
2008-2021
Yokohama National University
2010
Osaka University
1965-1988
Princeton University
1980-1986
Johns Hopkins University
1979
Johns Hopkins Medicine
1979
Measuring shock acceleration with peak accelerations ranging from 200 to 5000 m s−2 is a significant concern for mechanical or electrical applications in industries. To precisely calibrate accelerometers using acceleration, we developed calibration system at the National Metrology Institute of Japan. In system, exciter generates rigid-body collisions between three metallic bars inside an air bearing. The pick-up be calibrated fixed on edge surface third bar so that moves together bar....
This is the final report for CIPM key comparison CCAUV.V-K3 in area of 'vibration' (quantity acceleration). The aim this was to measure voltage sensitivity one accelerometer standard set with primary means at 27 frequencies from 0.1 Hz 40 Hz. Fourteen Metrology Institutes five RMOs have participated National Institute Metrology, P.R. China as pilot lab and Laboratoire de Métrologie et d'Essais South Africa co-pilot labs. One quartz-flexure servo single-ended type a signal conditioner...
This study describes the uncertainty of measurement about accelerometer sensitivity in shock calibration based on ISO 16063-13. The typical approximates to a sine-squared waveform with peak acceleration range from 200 5000 m s−2 and pulse width several milliseconds. shocks are generated by transient collision motion contact rubber surface between two rigid bodies. A laser interferometer He–Ne measures displacement change that is input be calibrated. evaluated time domain defined ratio...
Journal Article Oxidative Phosphorylation Coupled with Nitrate Respiration: III. Coupling Factors and Mechanism of Get access AKIHIRO OTA Department Biology, Faculty Science, University OsakaOsaka Search for other works by this author on: Oxford Academic PubMed Google Scholar The Biochemistry, Volume 58, Issue 2, August 1965, Pages 137–144, https://doi.org/10.1093/oxfordjournals.jbchem.a128175 Published: 01 1965 history Received: 27 February
In this paper, we discuss the effects of loading mass deformation and contact stiffness by giving various loadings in high-frequency primary calibration back-to-back accelerometer up to 20 kHz. The experimental contradiction sensitivity phase shift with respect effect described international standard document ISO 16063-11 indicates that there is no mass, but only stiffness. order explain validity according results, it was verified using a physical model finite element method COMSOL software....
Field measurements were collected through physical and observations in the cities of Seoul, Korea; Eugene Portland, Oregon; Yokohama, Japan, during fall, winter, summer seasons from 2005 to 2006. A total 1733 data sets (Seoul - 713; Oregon 807; Yokohama 213) variety multi-use buildings with goal examining operative temperatures conditions encountered everyday life. Of four measured, winter autumn indoor highest Seoul lowest when normalized outdoor conditions. In contrast, Oregon. Clothing...
This paper reports a novel system to evaluate angle error of rate-integrating gyroscopes. The equips with self-calibratable rotary encoder (SelfA) so that it has enough accuracy below 10-4-degree level even in rotation at several tens degrees per second. Angle errors such small cannot be measured ordinary tables. Therefore, our can contribute characterization high-performance inertial sensors.
Zero shift caused by the low frequency response of charge amplifiers is one most significant factors in shock measurements with long duration, such as calibration accelerometers. In order to reproduce same zero amplifier, infinite impulse (IIR) filters were developed applying a second transfer function high pass characteristic part measured amplifiers. For experimental verification using IIR filter, input/output signals amplifier investigated rectangular waveforms peak voltage 2 V and pulse...
To establish an easy-to-use traceability system for laser vibrometers in vibration acceleration standard, a highly accurate reference standard is required. In this study, we investigated the measurement reliability of commercial vibrometer with analog demodulator. The results confirmed large deviation from nominal sensitivity values due to characteristics reduce such deviation, high-accuracy digital demodulator, which can be utilized as was developed. experimental improved accuracy developed
In this study, the effect of demodulator unit characteristics on calibration a laser vibrometer is investigated. For purpose, two commercial available vibrometers with analogue units are used in experiments. The electrically calibrated using simulated frequency-modulated signals, which equivalent to output signals obtained from optics during calibration. results show extremely similar carried out accordance new proposed draft (ISO16063-41). Although both had large deviation more than 0.5 %...
This manuscript reports the result of an investigation into two types digital filters for numerical differentiation displacement signal in case primary shock calibration accelerometers. The first is a difference method with 4<sup>th</sup>-order Butterworth low-pass (4<sup>th</sup> BW) filter; other Savitzky-Golay (S-G) filter, which applies moving polynomial approximation. computational comparison was applied to low and high amplitude shocks using known excitation...
This paper describes the degree of equivalence between low-shock and centrifuge calibrations up to 10 000 m s−2 against three types piezoresistive accelerometer: an undamped sputter gauge type, a damped type semiconductive type. The complex sensitivity in calibration DC are well consistent within each expanded uncertainty frequency domain, together with vibration using second-order transfer function. In addition, preliminary budget facility is also indicated, distinctly estimated from...
Evaluating the response time of laser interferometer for primary calibration phase shift accelerometers is an essential prerequisite. Therefore, authors propose a method to evaluate with easy and inexpensive experimental set-up using electro-optical modulator. This research uses EOM modulate optical length gives change quadrature signal, thereby this determines intrinsic delay photo-detector preamplifier in used NMIJ.
In this paper, we outline a preliminary implementation of primary calibration for laser vibrometer (LV) on the basis newly proposed first ISO draft. The sine approximation method is applied to our system. Under some different measurement conditions, preliminarily carried out achieving reliable measurements. From these results, effects acceleration amplitude stability, mechanical distortion, position measuring beam, and spot diameter beam have been discussed. Some conditions required...
This is the final report for CIPM key comparison CCAUV.V-K4 in area of 'vibration' (quantity acceleration). The aim this was to measure voltage shock sensitivity an accelerometer measuring chain including a standard with charge amplifier and at different peak acceleration values associated pulse durations. Nine Metrology Institutes from five RMOs have participated National Institute Metrology, P.R. China as pilot lab Japan co-pilot lab. For sensitivity, all participating laboratories...
The low-frequency response of a charge amplifier induces an accelerometer (a combination piezoelectric transducer and amplifier) output voltage with zero shift. Hence, virtual same input–output characteristics as the was designed to reduce shift effect. shock sensitivities were evaluated by applying input acceleration amplifier. results study indicated that comparable vibration calibration results.