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Note: This system did not become a product
and therefore is not offered for sale--Sorry.-
or target shooting usually requires the shooter or a patient "spotter"
to score each round; each shot groups. Often the shooter must stop and
look through a spotting scope to see his last shot or shots; then reposition
himself and fire again, and so on...
We have developed an inexpensive, accurate, and
reliable method of instantaneously determining a shooter's score.
The shooter takes aim, and fires. Close to the
target, a shielded (bullet resistant), low cost CCD TV camera that is monitoring
the target at 60 images per second, transmits (via a low-power RF link)
these images to a small notebook or laptop personal computer located at
the shooter's position. When the PC's microphone "hears" the shot: a Delay
is started (delay < TOF, Time-of-Flight*), at the end of that delay
the last image from the camera freezes; then a much shorter second delay
times out, and a second image is captured (total delay > TOF*).
The PC then subtracts the two images--the first
image before the bullet hits, and the image immediately after the bullet
hits, interpreting the resultant video data. This interpretation takes
the form of looking for the largest change, or difference between the two
images: yielding the latest round's entry point.
After the round hits the target, the detection
& scoring process takes about 300 milliseconds, and the information
is instantly conveyed to the shooter via the system's graphics display;
also--at the shooter's option--the PC's sound output "tells" the shooter
the score via wireless earphones inside his hearing protectors. These earphones
being wireless can be part of one's clam-shell hearing protectors, or earplugs.
The voice is real recorded/sampled speech (the shooter's or whomever) using
whatever terminology the shooter desires, e.g.,
"Ring Six, Seven O'Clock," or "Ring Six, Outer Edge, Seven O'Clock."
The graphical presentation (GUI) can be the PC's
LCD screen (and/or TV/VCR), showing the target and indicating the latest
hit by a colored blinking red dot. The earlier hits can also be displayed
and would be color coded relative to their arrival order, e.g.,*
* Note: Adjustment
for Time-of-Flight will
vary with type of Rounds & Distances.
Indoor & Outdoor
User selectable System
Score Announcment is "spoken" into the shooter's Wireless Hearing
(HUD) on a scoped rifle
The system Recalibrates
60 times per second, on the real target's rings.
Accurate: It NEVER misses. (See
is presented in less than 300 milliseconds
after round "Hits" Target.
The time interval
between the "Before" and "After" images ~ 15-30
Rounds & Groups.
Scoring is Continuous;
and Immediate Totals at the end of a session
& Custom Targets.
Targets need replacing Less Often.
Impervious to Wind
& Lighting conditions
The Computer Records
all Shooting rounds, allowing video RePlay.
|It gives the shooter an aural score: "Ring Six, Seven O'Clock," as
well as, a visual score--in under 3 tenths of a second (0.3sec). It never
misses, and it is super accurate--it continually acquires the real target's
rings and constantly updates the system calibration--on the fly.
It works as follows:
|1) A video camera/camera capture card is continuously acquiring images
2) The gun is fired.
3) The sound is detected by a microphone near the shooter.
4) A delay is started, (delay < TOF*).
5) After this delay the most recent image is frozen.
6) Then after a second--shorter--delay (delay >
TOF*), a second image is captured.
5) The two images are then compared for differences exceeding some
6) The scoring info is immediately displayed graphically (within 0.3
7) Concurrent with the display, the score is "spoken" to the shooter:
Six, Seven O'Clock"
Adjustment for Time-of-Flight will vary with Rounds
Who will Benefit from the Automated
Target Scoring & Reporting System
|Gun clubs; Commercial in-door ranges, Private security guard companies;
Police departments, Police academies, Highway patrol, Sheriffs departments,
Swat teams; the U.S. Military, National guard units, Military reserve units,
R.O.T.C., Special forces; Third-world countries.
IBM Compatible PC (WinTel)
MS-DOS, MS-DOS 32, Windows 3.1, Windows95, Windows98, and Windows NT
Will enable better
supervision and evaluation of shooters, as well as, facilitate competitive
Use of the Internet
or Intranets for simultaneous competition between disparate shooting ranges
Each session is recorded
as /~.avi movies for replay and evaluation.
Alley," type combat shooting coverage:
Scoring and recording an individual's progress
through a combat course. Use of multimedia to record multiple views
(pictures in a picture) while "keeping score." Among the attributes scored,
one is reaction time after presentation of one of the Hogan's Alley characters.
Use of Multimedia to record an individual's stance,
positioning, coordination and reflexes while shooting; it's akin to
making a movie of a golfer's swing.
Another adaptation could be the installation
of a special form of a Heads-Up-Display (HUD) on a Scoped Rifle.
This could be in the form of a Binocular style
eyepiece arrangement where, in addition to the scope, there is a Video
Viewfinder Display. To avoid confusion, the shooter would press a button
located conveniently on the rifle to view the presentation in the left
kind of Chronograph:
Can be created by the use of two microphones:
one located at the shooter's position and the second located near the target--the
"bang mic" & the "thud mic." By timing the delay between the mics (and
compensating for the distance of the "thud mic" from the target), a very
accurate measure of each round's Time of Flight can be made.
2 Rounds, 1 Hole (Read below)
day during testing, we were trying to force an error.
The target, already having about a dozen holes
in it, was tilted at about 15 to 20 degrees such that the sun angle caused
a varying gradient shadow on its face.
One shot was fired and the system scored it as
a "hit." We looked at the target video (real captured image) and didn't
see a new hole. Then we examined the actual target looking for an elongated
or larger hole: there was none. Then we noticed the back of the target,
which was made of corrugated cardboard, and there it was: one hole where
the shredded edges of the cardboard had a different angle from all the
The entrance hole was indistinguishable from the
rest, but the exit hole was unmistakable: two rounds through one hole.
Even more remarkable was that we were using a rimfire .22 cal rifle, firing
Shooting Range Ballistics
Velocity verses Range
Real Target Video
Project Designer, Rob Burgun
Web Author, Glen Williamson
|Note: This system did not become a product
and therefore is not offered for sale--Sorry.
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