1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Non-invasive timing of gas gun-launched projectiles using external surface-mounted optical fiber-Bragg grating strain gauges
Rent:
Rent this article for
USD
10.1063/1.4793489
/content/aip/journal/rsi/84/3/10.1063/1.4793489
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/3/10.1063/1.4793489
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Two implementations, (a) filtered broadband illumination and (b) narrow linewidth laser illumination, for FBG optical strain gauge monitoring of transient hoop strain on a gas gun barrel. Photograph shows a FBG hoop strain sensor attached to the barrel of the single-stage gun. The length of the sensor package is approximately 25 mm.

Image of FIG. 2.
FIG. 2.

Single-stage light-gas gun hoop strain transients. (a) Gun barrel hoop strain transients recorded at a projectile velocity of 130 m/s. Grey curves are raw data recorded at 1 MS/s; black curves are 40 point sliding averages. (b) Gun barrel hoop strain transients recorded at a projectile velocity of 830 m/s. Black curves are raw data recorded at 1 MS/s. Traces are offset for clarity in (a) and (b).

Image of FIG. 3.
FIG. 3.

Projectile velocity, V HS , determined from the time interval between hoop strain transients measured by SSFBG 1 and SSFBG 2 versus projectile terminal velocity, V T . Solid line is a linear fit to the data. Residuals are the difference between the data and the fit.

Image of FIG. 4.
FIG. 4.

Two-stage light-gas gun transient hoop strain results. (a) Launch tube hoop strain transients from TSFBG 2 and TSFBG 3 recorded at a projectile velocity of 3000 m/s using the approach outlined in Fig. 1(a) . Grey curves are the raw data recorded at 1 MS/s; black curves are 40 point sliding averages. (b) Hoop strain transients recorded from TSFBG 2 and TSFBG 3 recorded at a projectile velocity of 2900 m/s using the approach outlined in Fig. 1(b) . Grey curves are the raw data recorded at 25 MS/s; black curves are 1000 point sliding averages. Inset shows these transients on an expanded time scale. Traces are offset for clarity.

Image of FIG. 5.
FIG. 5.

Hoop strain transients detected on the launch tube of the two-stage light-gas gun from gauges TSFBG 1 and TSFBG 2 using 20 MHz linewidth laser illumination (the approach outlined in Fig. 1(b) ). The data were recorded at projectile velocities of 1520 m/s (a) and 2790 m/s (b). Grey curves are the raw data recorded at 25 MS/s; black curves are 1000 point sliding averages. The following filter settings were used on the optical receivers for both (a) and (b): high-pass filter: 100 Hz; low-pass filter: 10 kHz. Traces are offset for clarity.

Image of FIG. 6.
FIG. 6.

Projectile timing obtained from hoop strain transients recorded on the launch tube of the two-stage light-gas gun. Time difference between hoop strain transients measured at TSFBG 1 and TSFBG 2, Δt HS , versus projectile terminal velocity, V T . Data points are solid circles, solid line is an empirical fit to the data (see text). Residuals (solid triangles) are the difference between the data and the fit.

Image of FIG. 7.
FIG. 7.

Projectile velocity, V HS , calculated from the time difference between hoop strain transients measured at TSFBG 2 and TSFBG 3. Data points are solid and open circles, solid line is a linear fit to the data excluding the outlier (open circle). Residuals (solid triangles) are the difference between the data and the fit.

Loading

Article metrics loading...

/content/aip/journal/rsi/84/3/10.1063/1.4793489
2013-03-04
2014-04-19
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Non-invasive timing of gas gun-launched projectiles using external surface-mounted optical fiber-Bragg grating strain gauges
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/3/10.1063/1.4793489
10.1063/1.4793489
SEARCH_EXPAND_ITEM