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Ph 5 > Lidar > Flashcards

Lidar Flashcards

1
Q

What does LASER stand for?

A

Light amplification by stimulated emission of radiation

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2
Q

What does LIDAR stand for?

A

Light detection and ranging

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3
Q

What are the uses of the Pro Laser 4?

A
  • Monochromatic light
  • Gallium arsenide solid state laser diode
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4
Q

What are the functions of the HUD?

A
  • Provides the aiming reticle
  • Provides current speed of target and tracking history
  • Displays tracking alert number after 3 seconds
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5
Q

What happens when the device is idle for 2 minutes?

A

Enters sleep mode

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6
Q

How long after being idle does the device power off?

A

15 minutes

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7
Q

What is the operational voltage range of the device?

A

4.3 to 7 volts

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8
Q

What type of power supply does the device use?

A

4 x AA batteries

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9
Q

What is the operational temperature range of the device?

A

-30 to +60 degrees

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10
Q

What is the weight of the device?

A

1.14 kg

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11
Q

What is the tracking speed range of the device?

A

8 kph to 320 kph

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12
Q

What is the accuracy of the device?

A

+- 1 kph (apply 2 kph tolerance for all speed offences)

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13
Q

What is the operational range of the device?

A

3 to 2438 m, operational range is 600 m

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14
Q

What is the wavelength of the device?

A

904 nm +-10 nm

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15
Q

What is the pulse repetition rate required for speed reading?

A

200 Hz – 70 Hz

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16
Q

What is the acquisition time for the device?

A

0.3 seconds

17
Q

What is the range resolution of the device?

18
Q

What is the beam width specification?

A

0.1 per 100 m (10 cm per 100 m)

19
Q

What is the frequency of LIDAR?

20
Q

How is speed detected using LIDAR?

A
  • Using the time of flight method
  • Each light pulse is timed from emission to target
  • 200 pulses of light every second
  • 70 pulses must return for a speed reading
21
Q

What are the requirements for a valid LIDAR check?

A
  • Visually observe target
  • Estimate target speed
  • Place aiming reticle on target vehicle
  • Obtain solid tone and speed reading
  • Verify speed estimate and reading agree
  • Minimum 3 second check
  • Continue to track visually
22
Q

What are the steps for a HUD alignment check?

A
  • Ensure pro laser is in range mode
  • Aim at a pole or small sign
  • Verify tone is audible
  • Move laser left to right
  • Ensure tone is heard when reticle is on target
  • Place pro laser on its side and retest
23
Q

How to perform the distance accuracy check?

A
  • Use a pre-measured course with ground markings
  • Check range at 25 m and note displayed distance
  • Check range at 50 m and note displayed distance
24
Q

What should the operator take into account when operating LIDAR?

A
  • Cosine angle 10:1
  • Clear line of sight
  • Weather conditions
  • Movement of the unit
25
What are potential influences on LIDAR readings?
* Cosine effect * Sweet effect * Reflection issues * Night operation and headlights * Laser jammers * Weather * Target distance * Multiple reflections
26
How is the poor weather feature selected and what is its effect?
* Hold poor weather button for 3 seconds * Allows LIDAR to operate efficiently in adverse weather over 60 m * No speed readings within 60 m
27
What should be done if the LIDAR is dropped?
Cease operation and forward the device to the REU
28
What happens if RFI is detected?
RFI will display in the rear window of the unit
29
What book must be completed at the start and finish of a shift if LIDAR is used?
Field book must be signed and logged
30
What displays in the rear window when LIDAR is turned on?
* Internal self-tests * Pass or fail * Time until recertification * SEGMENT ILLUMINATION * CONDUCT SELF TEST * EEPROM * TIMER * CRYSTAL * FIRMWARE * CERTIFICATION
31
What should be done in the event of internal test failure?
Turn off and on, replace batteries, if persists forward to REU
32
What care should be taken for the lens?
* External optical surfaces are coated glass * Store in provided case * Avoid scratching * Do not point laser at the sun
33
What are the laser don'ts?
* Don’t aim the laser at the sun * Don’t clean the lens with your shirt * Don’t pan or sweep the laser across the target * Don’t operate with a large cosine angle * Don’t operate without a clear line of sight * Don’t operate through closed windows
34
When should LIDAR not be used in certain locations?
* Within 50 m of a speed restriction sign unless: * Speed is excessive * Subject of a complaint * High accident history * Does not apply to a school zone * Any location that would engender criticism

Ph 5 (2 decks)

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