LIDAR Flashcards

1
Q

1- Care?

A
  • Protect optical lens from contact with any other object.
  • only clean the optical lens with optical cleaner.
  • Store & transport in protective case.
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2
Q

2- Six don’t? (know 4)

A

1- Don’t aim the laser at the sun.
2- Don’t clean it the with your shirt or hankey.
3- Don’t operate with a large cosine.
4- Don’t operate without proper line of sight.
5- Don’t pan or sweep across target.
5- Don’t operate through any fixed or closed windows.

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3
Q

3- What does laser stand for?

A

L- Light
A- Amplification by
S- Stimulated
E- Emission of
R- Radiation.

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4
Q

4- Test failure?

A
  • Error message displayed on the rear panel.
  • “help” displayed in the HUD.
  • Restart device. Return to REU if error still appears.
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5
Q

5- Aiming the reticle?

A
  • Aim at the centre of the number plate or leadlight if motorcycle.
  • Reading can be obtained at a greater range if vehicle is receding.
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6
Q

6- What 3 functions does the HUD perform?

A

1- Provide an aiming reticle.
2- Display distance and speed.
3- Tracking alert marked “X” after a 3 second continues tone.

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7
Q

7- Lidar will “sleep” in?

A

2 MINS

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8
Q

8- Lidar will shut down in?

A

15 MINS

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9
Q

9- What is poor weather mode?

A
  • Activated by pressing “poor weather” button for 3 seconds.
  • Improves device sensitivity.
  • Minimum range is set to 60m.
  • For fog, dust, snow and rain.
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10
Q

10- How is the sweep effect negated?

A

It is eliminated by having a complete tracking history

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11
Q

11- How to record a speed as an event?

A

Press the “Tick” button.

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12
Q

12- How to check Hud alignment?

A
  • Place pro laser in range mode.
    2- listen for beep.
    3- Pull trigger.
    4- Measure distance (25m and 50m)
    5- Move unit left to right across pole, tone should be heard when reticle on pole.
    6- Rotate 90 degrees and perform step 5 again.
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13
Q

13- What frequency is used?

A

330 Thz

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14
Q

14- Operating temperature?

A

-30 to +60 (same as radar).

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15
Q

15- What does LiDAR mean?

A

L- LIght.
D- Detection.
A- And.
R- Ranging.

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16
Q

16- What are the 7 steps for a valid speed check. (Know them verbatim)
V
V
P
O
V
M
C

A

1- Visual observation of the target vehicle & traffic.
2- Visual estimation of the target’s speed.
3- Place aiming reticle on the target vehicle.
4- Obtain a solid tone & speed reading.
5- Verify the estimation of speed & speed reading agree (within limits).
6- Minimum 3 second check.
7- Continue to track visually.

17
Q

17- What is the spread of the Prolaser 4?

A

15cm at 2438m

18
Q

18- Speed detection range?

A

8km/h – 320km/h.

19
Q

19- Speed Accuracy?

A

+ or – 1km/h.

20
Q

20- How is the speed detected?

A
  • Time of flight method.
  • Each light pulse is timed from being emitted to reaching a target.
  • 200 pulse of light emitted every second.
  • 70 pulses must return before a speed is displayed. (0.3 seconds)
21
Q

21- What is the default setting?

A
  • Speed mode.
  • 2438m range (600m for NSW police)
  • Both directions.
22
Q

21- What is the tolerance when performing start up procedure?

A

+ or – 20cm.

23
Q

22- Cosine ratio?

A

10:1

24
Q

23- Beam width?

A

10cm width per 100m