Towards traceable transient pressure metrology

Hanson, Edward; Olson, Douglas A.; Liu, Haijun; Ahmed, Zeeshan; Douglass, Kevin O.

doi:10.1088/1681-7575/aaad1b

Cited by 14 publications

(8 citation statements)

References 32 publications

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“…The individual contributions to the measurement uncertainty are collected in tables 5 and 6. When all uncertainty contributions are combined using equation (7) and with the proper statistical distributions of the individual contributions, and considering that they are statistically independent, one arrives at the expanded measurement uncertainties (coverage factor k = 2) for the pressure measurement chain itself (table 7).…”

Section: Total Uncertaintymentioning

confidence: 99%

“…Dynamic measurements of pressure play a key role in manufacturing, process control, product testing, internalcombustion engines, and in safety-related measurements [1][2][3][4][5][6][7][8]. For instance, to ensure the safety of the user of powderactuated tools or firearms the maximum safe pressure during firing of the tool or gun must not be exceeded.…”

Section: Introductionmentioning

confidence: 99%

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Measurement uncertainty of a measurement system for dynamic pressure in the kbar regime

Slanina

Wynands

2021

Meas. Sci. Technol.

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We have characterized the measurement uncertainty of a setup for the dynamic measurement of pressure pulses with amplitudes in the low kbar range and with millisecond duration. The uncertainty is closely proportional to pressure, with a magnitude of 0.34% (coverage factor k = 1). In particular, we treat the safety-critical application of measuring the pressure inside an ammunition cartridge during firing, where a target uncertainty of 3% has been set by the Permanent International Commission for the Proof of Small Arms.

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Section: Total Uncertaintymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement uncertainty of a measurement system for dynamic pressure in the kbar regime

Slanina

Wynands

2021

Meas. Sci. Technol.

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“…Metrological traceability to the International System of Units (SI) requires the development of appropriate primary standards for dynamic measurements of pressure [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. The aperiodic shock tube pressure generators show a potential to provide SI-traceable dynamic calibrations for pressure sensors [ 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Dynamic Response of a Side-Wall Pressure Measurement System on Determining the Pressure Step Signal in a Shock Tube Using a Time-of-Flight Method

Svete

Castro

Kutin

2022

Sensors

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Technological progress demands accurate measurements of rapidly changing pressures. This, in turn, requires the use of dynamically calibrated pressure meters. The shock tube enables the dynamic characterization by applying an almost ideal pressure step change to the pressure sensor under calibration. This paper evaluates the effect of the dynamic response of a side-wall pressure measurement system on the detection of shock wave passage times over the side-wall pressure sensors installed along the shock tube. Furthermore, it evaluates this effect on the reference pressure step signal determined at the end-wall of the driven section using a time-of-flight method. To determine the errors in the detection of the shock front passage times over the centers of the side-wall sensors, a physical model for simulating the dynamic response of the complete measurement chain to the passage of the shock wave was developed. Due to the fact that the use of the physical model requires information about the effective diameter of the pressure sensor, special attention was paid to determining the effective diameter of the side-wall pressure sensors installed along the shock tube. The results show that the relative systematic errors in the pressure step amplitude at the end-wall of the shock tube due to the errors in the detection of the shock front passage times over the side-wall pressure sensors are less than 0.0003%. On the other hand, the systematic errors in the phase lag of the end-wall pressure signal in the calibration frequency range appropriate for high-frequency dynamic pressure applications are up to a few tens of degrees. Since the target phase measurement uncertainty of the pressure sensors used in high-frequency dynamic pressure applications is only a few degrees, the corrections for the systematic errors in the detection of the shock front passage times over the side-wall pressure sensors with the use of the developed physical dynamic model are, therefore, necessary when performing dynamic calibrations of pressure sensors with a shock tube.

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“…In the stricter sense of the term 'calibration', meaning accredited or acknowledged by the CIPM mutual recognition arrangement, dynamic calibration is currently lacking [9]. Several National Metrology Institutes are working to establish a traceability chain of time-varying pressure measurements [10][11][12][13][14][15]. To establish the traceability, developing the candidate primary standards that can realize time-varying pressure with a specific frequency bandwidth and amplitude is important [16,17].…”

Section: Introductionmentioning

confidence: 99%

Towards traceable dynamic pressure calibration using a shock tube with an optical probe for accurate phase determination

2022

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In this paper, we introduce a robust method for dynamic characterization of pressure measuring systems used in time-varying pressure applications. The dynamic response of the pressure measuring systems in terms of sensitivity and phase as a function of frequency at various amplitudes of the measurand can be provided. The shock tube which is the candidate primary standard for dynamic pressure calibration at the National Laboratory for pressure, Sweden, was used to realize the dynamic pressure. The shock tube setup used in this study can realize reference pressure with amplitudes up to 1.7 MPa in the frequency range from below a kilohertz up to a megahertz. The amplitude of the realized step pressure was calculated using the Rankine-Hugoniot step relations. In addition, the accurate time of arrival of the generated shock at the device under test (DUT) was measured using an optical probe based on shadowgraphy. The optical detector has a response time in nanosecond time scale which is several orders of magnitude faster than the response time of any pressure measuring system. Hereby, the latency between physical stimuli and response of the DUT can be measured. By the knowledge of the amplitude and the accurate time of arrival of the reference step pressure, the transfer function of the DUT can be calculated and presented in Bode diagrams of sensitivity and phase response versus frequency. The uncertainty in sensitivity and phase measurements was estimated. The information provided by this work is useful for developing reliable models of dynamic pressure measuring system and provide accurate information about their dynamic response. That in turn will contribute to establish a traceability chain for dynamic pressure calibration.

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Towards traceable transient pressure metrology

Cited by 14 publications

References 32 publications

Measurement uncertainty of a measurement system for dynamic pressure in the kbar regime

Measurement uncertainty of a measurement system for dynamic pressure in the kbar regime

Effect of the Dynamic Response of a Side-Wall Pressure Measurement System on Determining the Pressure Step Signal in a Shock Tube Using a Time-of-Flight Method

Towards traceable dynamic pressure calibration using a shock tube with an optical probe for accurate phase determination

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