referencing a youtube video showing all kinds of classic mouse trap triggerings (with 7500fps high speed camera for 120,000$) I learned that trigger-closed timeframe is 1/90th second only!
I ordered a pair of mouse traps for 4$ on amazon and received them today.
Yes, for raspivid this gadget would not be interesting, on one frame you see the trap closed, on the next frame all would be complete.
But for raspiraw based high speed modes (with 5$ Raspberry v1 camera)
this gadget is interesting.
I did not take that fastest mode, but 640x240_s stretched mode (every other line gets captured for top half of VGA format, and lines are doubled in post processing) is a good compromise between area (1/2 fov) while still giving 360fps!
Since I have two mouse traps, and I saw in the 7500fps videos that mouse traps fly themselves after triggering, I fixated one mouse trap with two skrews on workbench for (mouse trap) local high framerate experiments.
Below is a video (played at 25fps, 14.4 times slower than real) where trap gets triggered by a falling small Lego piece.
- first the piece falls slowly (2.77ms between frames)
- then it triggers
- 4 frames later the trap is closed on front side
- 1 fame later trap is closed on back side as well, and Lego piece gets hit and pushed to right side
- 3 frames later Lego piece hits vertical part of trigger and gets redirected to left and upwards
- finally lego piece flies slowly outside view, rotating
https://www.youtube.com/watch?v=0XNsXvb ... e=youtu.be