Laser Parking Sensor

[krisshortland]

The worlds first laser based parking sensor that has "E" mark approval as one and TUV goes on sale very shortly. by the word laser based with full update capabilty by the user it really will be the worlds 1st ever laser parking sensor. by "Laser" being used it just happenens to be the worlds best at something else contact ukspeedtraps.co.uk for more info

[NugentS]

krisshortland said:

The worlds first laser based parking sensor that has "E" mark approval as one and TUV goes on sale very shortly. by the word laser based with full update capabilty by the user it really will be the worlds 1st ever laser parking sensor. by "Laser" being used it just happenens to be the worlds best at something else contact ukspeedtraps.co.uk for more info

Maybe I am being stupid - but where?

Sean

[smeggy]

krisshortland said:

The worlds first laser based parking sensor that has "E" mark approval as one and TUV goes on sale very shortly. by the word laser based with full update capabilty by the user it really will be the worlds 1st ever laser parking sensor. by "Laser" being used it just happenens to be the worlds best at something else contact ukspeedtraps.co.uk for more info

[sceptical]

A Lidar unit will output a high power (~30 watt) collimated beam of pulses over great distances, a significant portion of which will be reflected directly back to the unit from the VRM. This parking sensor will have to operate over the same distance, but with a relatively huge beam spread (as it won’t know where to aim its beam), with enough power to activate the Lidar laser sensor. Therefore the output power of this parking sensor must also be huge, certainly orders of magnitude greater than a genuine parking sensor (having a nominal range of a few meters). This is how a court will prove intent of obstruction or even perversion of justice.

There’s no reason why this parking sensor will need to be activated by external means, otherwise it will quite obviously have a dedicated jamming function; hence I reckon this device will have to be permanently transmitting when switched on. Jammer emitters are ‘on’ for a large amount of time (2%, compared to 0.00005% for a Lidar emitter). The high average output power, combined with the fact that the laser will be invisible (no eye blink protection), will likely make this device dangerous and illegal for use in public places. It may even show up on a normal video camera.

I really can’t see this unit selling for very long!

[/sceptical]

I guess that you’re so terrible at parking that you’ll also need a front parking sensor too huh?

[dilbert]

If I was going to develop a "parking sensor", it would be based on those rotating advertising hoardings. You know the ones that have big bands that roll on rollers, or are made up of triangular rotating elements.

You make them optically diffuse on one side, and not the other. Significantly, both can be reflective, and unlike "parking sensors" that try to obscure information by hiding "digital information", these look pretty normal under most circumstances.

[catso]

smeggy said:

I guess that you’re so terrible at parking that you’ll also need a front parking sensor too huh?

My Wife's car has parking sensors Front and Rear as standard.

and she needs them

>> Edited by catso on Wednesday 7th September 16:51

[Balmoral Green]

catso said:

My Wife's car has parking sensors Front and Rear as standard. and she needs them

The bumpers?

[smeggy]

[MR2Mike]

smeggy said:

A Lidar unit will output a high power (~30 watt) collimated beam of pulses over great distances, a significant portion of which will be reflected directly back to the unit from the VRM.

Nope, only a very small signal has to reach the speed gun for it to get a reliable lock. Many of the so called "garage door openers" use normal IR LED's which seem to give enough power to confuse the speed gun.

[catso]

Balmoral Green said:

The bumpers?

well no it actually has the sensors, but she's still managed to bump the bumpers

and dent the doors and scratch the.....

[smeggy]

MR2Mike said:

smeggy said: A Lidar unit will output a high power (~30 watt) collimated beam of pulses over great distances, a significant portion of which will be reflected directly back to the unit from the VRM. Nope, only a very small signal has to reach the speed gun for it to get a reliable lock. Many of the so called "garage door openers" use normal IR LED's which seem to give enough power to confuse the speed gun.

My figures are correct.
Lidar units operate up to 1km. Losses due to the spread in both directions over the distance is great, the VRM helps a lot but it’s not perfect.
Due to the required spread and operating distance, those jammer LEDs must emit a huge amount of power (usually run at their limits) such that their pulses are detected at the sensor; a real parking sensor does not need this power because it doesn’t need the range.

[Peter Ward]

These cars with intelligent cruise control must have something similar? They must be on all the time and work at quite a significant range to be effective? I believe that ICC works using lasers.