Speed Trap Hunter Forum: Best Radar Detectors, Laser Jammers, Laser Detectors, Speed Cameras Forum  

Go Back   Speed Trap Hunter Forum: Best Radar Detectors, Laser Jammers, Laser Detectors, Speed Cameras Forum > Speed Trap & Traffic Enforcement > Police Laser (LIDAR) Enforcement
Radar Detectors Forum Logon:


Police Laser (LIDAR) Enforcement Discussion of police laser (lidar) enforcement and related technologies.

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)   IP: 75.139.144.43
Old 2012-06-14
dtmcnamara dtmcnamara is offline
Junior Member
 
Join Date: 2008 Apr
Location: Snellville, GA
Posts: 0
dtmcnamara is on a distinguished road
Default Divergence of a laser vs. motorcycle

First I would like to introduce myself. I have been a long time creeper on this form but never really posted anyting, hopefully this will change now.

My names David McNamara, im a engineering student at GA Tech, here in Atlanta, GA, and I love proving facts with math.

Now on to business. I have been doing some research and am a little uncertain how at 1000ft a 3ft radius laser beam can accurately determine if it clocks a motorcycle or a car behind it. I own a Buell Firebolt XB9R with a MAX width of 28 inches on the front fairings. The headlights are dual projectors, almost 2 inches in diameter and right at 10-12inces apart. To me, a 36in wide beam going down a lane with "heavy" traffic could not accurately determine if it was hitting a motorcycle with that small of area or the car behind it.

Please someone enlighten me. I love to learn and this is a case that I am trying to fight as we speak.

PS- I attached a picture of the motorcycle to show the small frontal area
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #2 (permalink)   IP: 98.114.180.162
Old 2012-06-14
Veil Guy's Avatar
Veil Guy Veil Guy is offline
Speed Trap Hunter
 
Join Date: 2007 Jul
Posts: 116
Veil Guy is on a distinguished road
Default

I believe it is simply a matter of programming and firmware.

Unlike RADAR which works on Doppler shifting which can reflect a stronger signal from the following vehicle (although there is firmware to address that issue to some extent), LIDAR works on TOF principles (time of flight), in this case, the filtering algorithms typically pick up reflection of the primary target and count in some regular fashion.

I believe of some reflections get picked up from a trailing vehicle, the time to flight sequence would become unusual and irregular and those with the better and more refined algorithms, get discarded.

This is not to say, that there would never be a circumstance that could create an erroneous reading.

Years ago, during earlier versions of LIDAR guns, such occurrences were likely more frequent or potentially so.

For that reason, a case was litigated in NJ that restricted use of LIDAR (at least in that state) to a distance fewer than 1000 feet.

I routinely have been clocked at much higher distances, though, so that ruling's effects are dubious.

A proper speed clock, should have a tracking history, which should minimize such scenarios.

Hope this is a sufficient explanation addressing your concerns.


Veil Guy's Sig:

Protect yourself from speeding tickets[/b] with the VEIL stealth coating.

Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #3 (permalink)   IP: 75.139.144.43
Old 2012-06-14
dtmcnamara dtmcnamara is offline
Junior Member
 
Join Date: 2008 Apr
Location: Snellville, GA
Posts: 0
dtmcnamara is on a distinguished road
Default

I am guessing that algorithms could play a part in the selection of the vehicle. I should be getting the police report along with calibration logs soon to verify the distance that I was officially clocked at and verify the LIDAR gun was in fact a PL3. I am just crossing my fingers I find some mistake in these papers.

Veil Guy, do you know anyone who might be able to explain the software side of a LIDAR gun in detail, especially the PL3? I don’t want to rely on the officer not showing I want to go in there with cold hard proof that there is not a 100% guarantee that I was the one clocked.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #4 (permalink)   IP: 98.114.180.162
Old 2012-06-14
Veil Guy's Avatar
Veil Guy Veil Guy is offline
Speed Trap Hunter
 
Join Date: 2007 Jul
Posts: 116
Veil Guy is on a distinguished road
Default

That could be very difficult, as each company, I trust would consider that confidential (trade secret) information.

Even though he remains unpopular, I believe Craig Peterson would be able to shine some light (no pun intended) on your issue. You could email over at RadarTest.com. Tell him I referred you.

Depending on your particular circumstance, I would try to negotiate a 'settlement'

When I was younger I used to fight the hard way.

I generally avoid this tactic as much as possible and instead work amicably to a negotiated settlement (outside of the trial process), that gives them a little bit, and you a bit of a break, sometimes a big one.

I learned this at a Dale Carnegie course:

You can catch more flies with honey than with vinegar


Veil Guy's Sig:

Protect yourself from speeding tickets[/b] with the VEIL stealth coating.

Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Escort Passport 9500ix Veil Guy Escort (Passport) 32 2011-05-16 01:58
Recent Laser Encounters with V1, 9500i, and Redline Rocky2 Video: Laser Detector 0 2010-08-08 23:25
Veil Paint: How far to go Mstaples Speeding Tickets & Traffic Citations 5 2009-01-11 11:33
What Everyone Should Know About Laser Guns NMA Reporter NMA Articles 0 2008-02-28 07:50
Motorcycle advice SpeedCheetahAl Cheetah 0 2007-10-03 14:45


All times are GMT -4. The time now is 12:32.


©2009 SpeedTrapHunter