traffic light sensors

[Yankee]

so what is being detected at 2am when i am the only thing on the road trying to get the light to change?
is it:
OH WAIT, i'll make this a VOTE!!!
yiipppeee!
uh, i'm sad i know......

[Ment]

I thought it was a magnet which the metal in the car trips.
hence why bikes car have a bit of a problem as there isnat as much metal there.

at least thats what im told.

[ttc]

Yankee.. you're lucky i don't know where you live

[Nanna10r]

I thought it had a chemical sensor that could tell if you had Lead replacement petrol or not If you do then it stays green for weeks or until you push your bike through the intersection (cause its ceased from LRP) ......... whcih ever comes first.

Magnetic mat sensor Lurpee ya bloody rabbit. Lay your bike on its side that ll make it change.

Cheers Brett

[Duane]

As far as I know its just a weight sensor, and bikes have trouble because most of them are setup to only register over a certain weight.

Most intersections will have panels cut out at the front where the lights are, so if theres a vehicle waiting at the lights, it knows.

I've always just jumped up and down on the bike, that worked for me. if not , hop up, walk over to the pedestrian crossing button, hit that and wait

[Flakey]

the sensors are metal detectors. They are coils of wire which have a set frequency running through them.

When a metal object is close and large enough, it changes the harmonics of the loop, which changes the frequency, hence they detect vehicles.

The amount of change is determined by the amount and type of metal, hence non-ferrous metals (alloys etc) have less of an effect.

When you park you bike on them you have a light weight non-ferous mass which can be hard for it to detect (with out giving false readings).

They are most sensitive in the centre of the lane (where all the oil is) due to the coils being in a figure 8.

[tape]

sensors in road is my 2 cents worth.. tho if on a bike ya havta ride on the white line as in lane splitting for it to acctivate....

but I'm usually wrong....rofl

[Smitty]

none of the above..is the correct answer

In Vic (don't know about the other states)
traffic lights, if not on a program cycle
will be triggered by vehicles (cars trucks bikes etc)
with a magnetic signature stopping on
the ground loop (the cuts in the road surface, you see)
so
if your bike has lotsa alloy, you will not trigger
or change the traffic light cycle
coz your bike has a small magnetic signature

I have no probs with the GPx..it has a steel frame

cheers

[photomike666]

none of the above..is the correct answer

In Vic (don't know about the other states)
traffic lights, if not on a program cycle
will be triggered by vehicles (cars trucks bikes etc)
with a magnetic signature stopping on
the ground loop (the cuts in the road surface, you see)
so
if your bike has lotsa alloy, you will not trigger
or change the traffic light cycle
coz your bike has a small magnetic signature

I have no probs with the GPx..it has a steel frame

cheers

Spot on buddy,

This is exactly how the damn things work, and I believe there is a work around.

There was a report in Motorcycle News (UK) of a company that was selling an elceto-magnet that made the sensors recognise your bike.

I didn't buy one however. If it's that early in the morning that the lights work on the sensor, there's not usually anyone around, so I just treat them as a give way signal.

[Nanna10r]

So whats a magnetic Mat sensor Fellas ?, I may have the terminology wrong but the principle was right. Sheesh picky picky
Cheers Brett

[tape]

GEEEEEZUS Brett get it right will ya

either way they don't change fast enuf for my liking (on my side of the road anyway)

cheers

[MunkeeGrlZX6R]

I think its definately a weight thing. On the zz-r the lights would change if I jumped up and down several times while sitting on the spot where the sensors are.

But I have found when there are two of us sitting at the lights and we're both on the sensor, the lights seem to recognise that the weight of two bikes is like a small car...mini maybe.

But hey know knows how it really works?? I'm a girl and my original intelligence is surpassed by my ability to steal someone elses idea...

[Smitty]

Ich habe eine Tätowierung gerade hinter meinem Ohr, sagt es, zu Druck Zwanzig pro Quadratzoll aufzublasen

wtf????
I credit my tatoos straight line after my ear
to pressure 20 square inches of big headedness

literal transalation of course....
its a few years since I have been in Europe
and the German is a bit rusty...

oops off topic I know


Prost!

[MunkeeGrlZX6R]

Ich habe eine Tätowierung gerade hinter meinem Ohr, sagt es, zu Druck Zwanzig pro Quadratzoll aufzublasen

wtf????
I credit my tatoos straight line after my ear
to pressure 20 square inches of big headedness

literal transalation of course....oo
its a few years since I have been in Europe
and the German is a bit rusty...

oops off topic I know


Prost!

My translator program says that this is the way to write

"I have a tattoo behind my ear that says inflate to twenty PSI"

but you'rs sounds more interesting

[ty]

I think its definately a weight thing. On the zz-r the lights would change if I jumped up and down several times while sitting on the spot where the sensors are.

This is more likely because you were bouncing the bike, squashing the suspension and getting it closer to the sensors - same reason why they'll often change if you simply put your sidestand down.

But I have found when there are two of us sitting at the lights and we're both on the sensor, the lights seem to recognise that the weight of two bikes is like a small car...mini maybe.

More metal - so more to sense.
ty