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THPC TEU > Lidar - Phase 5 > Flashcards

Lidar - Phase 5 Flashcards

1
Q

What are the Minimial, Nominal and Maximum range of the Pro-Laser 4

A

Min: 3 metres. Nom: 600m. Max: 2438m

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2
Q

The Pro-Laser 4 utilises a what Diode?

A

Gallium Arsenide (GaAs) Solid State Laser Diode

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3
Q

What Frequency does the Pro-Laser 4’s use?

A

330THz (TeraHertz)

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4
Q

Explain Cosine Angle for Pro-Laser 4

A
  • Greater the angle, the lower the recorded speed.
    -Always in Motorist’s Favour.
    -Apply 10:1 ration to overcome Cosine at 100km/h.
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5
Q

What are the 7 points of a valid Lidar check

A

1) Visual observation of Target vehicle and traffic.
2) Visual estimation of Target’s Speed.
3) Place aiming recticle on Target vehicle.
4) Obtain solid tone and speed reading.
5) Verify estimate of speed and speed reading agree. (Within Limits)
6) Minimum of 3 second check.
7) Continue to track visually.

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6
Q

What are the limits for the Pro-Laser 4 temperature wise.
(Min and Max Degrees)

A

Pro-Laser 4 can operate between -30 Degrees to +60 Degrees.

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7
Q

What are 3 things to remember when taking care of a Pro-Laser 4.

A

1) Protect optical lens from contacting any object.
2) Clean lens with optical cleaners only.
3) Store and transport in protective cases.

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8
Q

What are the 6 Pro-Laser 4 “Don’ts”

A

1) Don’t aim the laser at the sun.
2) Dont clean the lens with shirt or hanky.
3) Don’t pan or sweep laser across target.
4) Don’t operate with large cosine.
5) Don’t operate without a clear line of sight.
6) Don’t operate LIDAR through any fixed or closed windows.

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9
Q

What is the speed accuracy of the Pro-Laser 4.

A

+ or - 1 km/h.

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10
Q

What 3 functions does the HUD perform.

A

1) Provides aiming reticle the operator uses to aim at the desired target.
2) Displays speed or range of the target as operator continues to observe target creating tracking history.
3) Displays the tracking alert marker after 3 seconds of continuous tone, X displayed.

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11
Q

What does LIDAR stand for?

A

Laser Detection and Ranging.

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12
Q

What is the Optical Wavelength of the Pro-Laser 4?

A

Optical Wavelength is 904nm (+ or - 10nm)

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13
Q

What happens after 2 minutes and 15 minutes without activity on Pro-Laser 4?

A

1) After approximately 2 minutes without activity will enter sleep mode.
2) “Sleeping” displayed on rear display.
3) Locked speed or range returns to display when the user re-activates by pressing one
(1) of the control buttons.
4) After approximately 15 minutes without activity will shut down operation.

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14
Q

How do you activate the “Poor Weather” function on Pro-Laser 4.

A
  • Pushing and holding the poor weather button in speed/range mode for 3 seconds.
  • Pressing the poor weather button when in menu.
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15
Q

What are some functions of “Poor Weather” when activated?

A

• Improves sensitivity in adverse weather conditions
• Fog, rain snow and heavy dust
• Sets minimum range to 60 metres
• No speed or range readings possible within 60 metres.

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16
Q

How do you record a speed check as an event on Pro-Laser 4?

A

To record a speed check as an event, push the check button.

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17
Q

What are the default settings of a Pro-Laser 4.

A

• Speed Mode
• Both Directions
• Maximum Range 2438 metres
• As used by the NSW Police Force
• 600 metres

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18
Q

Pro-Laser 4 emits how many pulses a light every second?

A

200 pulses of light a second.

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19
Q

How does the Pro-Laser 4 calculate speed?

A

• 200 pulses of light emitted every second,
• Timer starts as pulse leaves,
• Stops when energy is reflected back,
• Based on known speed of light the Prolaser calculates range,
• After approximately 70 readings the Prolaser will display a speed.
• Takes approximately one third of a second.

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20
Q

How fast is the speed of light?

A

• Speed of light is always a constant
300,000,000 metres per second.

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21
Q

What is the Range accuracy on a Pro-Laser 4?

A

Range Accuracy is + or - 150mm or 15cm over 2438m

22
Q

What is the Speed range on Pro-Laser 4?

A

Speed range 8 km/h to 320 km/h.

23
Q

What is the Beam Width on a Pro-Laser 4?

A

Beam width 10 cms per 100 metres.

24
Q

When using a Pro-Laser 4, where should you aim the recticle on the target?

A

• Centre number plate area
• Headlight of motorcycle
• Greater distance can be obtained on receding targets.

25
Q

How do you conduct an Internal test on Pro-Laser 4?

A

•Pushing power button if switched off
Or
• Pressing and holding the check button for 3 seconds.

26
Q

What happens if the Internal Test Fails on Pro-Laser 4?

A

• Error message displayed in rear panel.
• “HELP” appears in the HUD.

27
Q

What should you do if Pro-Laser 4 displays “HELP” in the HUD.

A

• Turn unit off and on again.
• If message persists note message and
• Return to REU

28
Q

How do you conduct a HUD check on a Pro-Laser 4?

A

1) Place Pro-laser in RANGE mode.
2) Verify tone is audible
3) Pull trigger using pole or sign with clear background.
4) Move unit left and right
5) As HUD reticle is moved onto target a clear tone should be heard,
6) When reticle is not on target - no sound and no range displayed.
7) Rotate unit 90 degrees and repeat.

29
Q

How do you conduct a Distance Accuracy Check on Pro-Laser 4?

A

• Place Pro-laser in RANGE mode
• At premeasured distances
• 25 and 50 metres
• Fire laser and record readings in Field Book
• Note readings should be + or - 20 cms of marking points.

30
Q

When can the Sweep Effect take place?

A

• Sweep effect may occur when operators target sides and bonnets of target vehicles
• Sweep effect may occur at distances in excess of 150 metres
• Sweep effect can add to or subtract from the speed of a target vehicle
• Can be eliminated by having a complete tracking history

31
Q

What does “LASER” mean?

A

Light Amplified by Simulated Emission of Radiation.

32
Q

What is the minimum detection time for a valid speed check?

A

3 seconds.

33
Q

What may affect the Pro-Laser 4’s ability to detect speed a night time.

A

Halogen High Beams as it contains IR which may affect the Laser’s ability to detect the reflected laser pulse.

34
Q

There are 7 Potential Influences that may cause the Pro-Laser 4 to not display speed readings. What are they?

A

• Cosine effect
• Sweep Effect
• Reflection influences
• Night operation and headlights
• Laser jammers
• Weather
• Targeting distance
• Multiple reflections.

35
Q

What type of weather conditions play a role in affecting the target acquisition on Pro-Laser 4?

A

Fog, snow, rain and blowing dust

36
Q

What happens if the EEPROM test shows “EEPROM = Fail” on Internal Tests?

A

Start up sequence will be aborted and ProLaser 4 will shut off.

37
Q

What Batteries does the ProLaser 4 utilise?

A

4 x AA Batteries.

38
Q

What is the operating voltage of Prolaser 4?

A

4.3-7.0 VDC

39
Q

What are the 3 functions the “✅” performs in the ProLaser 4?

A

• Hold for 3 seconds to initiate a self test.
• Used to activate lock mode.
• Select Menu Options.

40
Q

What book must be completed at the start and finish of a shift if the LIDAR is used for speed enforcement duties?

A

The Field Book

41
Q

What happens if radio interference is detected?

A

If such RFI fields are detected, the ProLaser will inhibit range and speed measurement functions, and display the “RFI detect” message in the rear panel.

42
Q

What are the two functions of the “Poor Weather” button?

A

It sets the brightness of the Head-Up Display (HUD) and turns the unit’s poor weather feature on and off.

43
Q

Why should the reticle alignment be checked at the start and end of every shift?

A

To ensure beam is aligned with Recticle.

44
Q

The ProLaser 4 emits what?

A

Light Pulse

45
Q

The Laser beam with regard to the aiming reticle is at what over distance?

A

About the same size as the reticle at any distance.

46
Q

Cosine angle effect is negligible until what degree is exceeded

A

10 degrees.

47
Q

To program the Prolaser 4 for approach mode only you must?

A

Press menu, select Set Direction, select down arrow.

48
Q

When considering distance accuracy check on Pro Laser 4 the measurement accuracy must be within ?

A

+ or - 200mm

49
Q

The Sweep effect can be overcome by?

A

Having a complete tracking history.

50
Q

When using the Pro Laser 4, what can effect target acquisition?

A

Sweep effect, Target Distance and Weather

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