ALPriority, Laser Interceptor and V1 vs Rear Facing Vitronic PoliscanSpeed

[nano]

Great video, winterbrew! Thanks for sharing.

Have you had any encounters where it was necessary to jam the Poliscan? During my driving, detection was always long enough to reduce to the speed limit. "Unfortunately" I was never in the situation to jam it, so I was wondering if you made already some experience.

Poliscan only needs 10 consecutive pulses for a speed reading, and at 100pps, that equates to 0.1 sec speed aquisition time.

From studying the working principle of the VPS, it is required to obtain a measurement distance of 10m (within 50 to 20m). There are a few other criterias (driving angle <5°,...), but they are all independent from the detected pulses.

[winterbrew]

Hi nano,

As you say, usually the warning you receive is > 200m so plenty of time to JTK.

These are a couple where warning is minimal. First video, detection is blocked by the car waiting to pull out of the junction on the left. 2nd is where they are using bushes to minimise detection until the last minute. Of course, when you meet a rear facing setup, it is always usually a JFG situation until you clear the measurement zone;

[dinkydi]

sure hope the polis dont jump borders ,

[winterbrew]

Here's one I found in my dashcam archives, after thinking about the results in the first vid ;



Laser Interceptor Quad (2 front, 2 rear), 8.9 heads, v 8.12A firmware misses a rear shot from a Vitronic PoliscanSpeed in the grey cabinet on the left of the freeway. LI was running at maximum sensitivity, and this was a case of failure to detect in time, not failure to jam. V1 picks up the rear laser and alerts after passing the camera.

About 80 -90% of the time, it will detect a rear facer (a miss is rare), but it kicks in around 50 -60m past the camera, which is too late, as the Poliscan has started it's calcs from 10m (33') past the camera, then IPT with a very narrow beam diameter, and will nab you at about 20 - 30m past. Hopefully LI will come up with a way to go to 'Volume 11' on the sensitivity for Poliscan, or give us new compact heads with more than 2 receiving diodes per head.

[dinkydi]

li's seem to be falling behind with progressive updates , at the moment, just wonder if more diode heads come out for the li ,would the cpu cope with that, or would every thing have to be designed from the ground up,