High-speed camera analysis in munition detonation tests
The test event is recorded by a high-speed camera behind a protective barrier. In every frame the front radius is measured against a scaled backdrop; the expansion curve is extracted and compared with the reference band.
Time, radius and velocity of every frame are written to the test record; the expansion curve is shown on the analysis display together with the reference band. A record that leaves the band is flagged NG and set aside for review.
- 01 Arm
- 02 Trigger
- 03 Frame gauging
- 04 Decide
The sample is in place; the camera waits for the trigger while the countdown runs.
- Frame time
- —
- Front radius
- —
- Front velocity
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Need
The event is over within milliseconds; the front travels a visible distance between two frames and smears under a long exposure. The flash saturates the sensor and smoke hides the edge, while for safety the camera has to look from behind a barrier.
Solution approach
The camera looks perpendicular to the expansion plane from behind a protective window. The striped scale board converts pixels into length and makes the passing front stand out. Recording is synchronised with the trigger signal; in every frame the front edge is located, its radius is measured from the centre and paired with the frame time to build the expansion curve.
Process steps
- 01
Arm
The sample is in place; the camera waits for the trigger while the countdown runs.
- 02
Trigger
The event is recorded at a high frame rate, synchronised with the trigger signal.
- 03
Frame gauging
In each frame the front edge is located and its radius is measured.
- 04
Decide
The expansion curve is compared with the reference band.
Related applications
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