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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?

A

0.1 m

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?

A

330 THz

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
Q

What are potential influences on LIDAR readings?

A
  • Cosine effect
  • Sweet effect
  • Reflection issues
  • Night operation and headlights
  • Laser jammers
  • Weather
  • Target distance
  • Multiple reflections
26
Q

How is the poor weather feature selected and what is its effect?

A
  • 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
Q

What should be done if the LIDAR is dropped?

A

Cease operation and forward the device to the REU

28
Q

What happens if RFI is detected?

A

RFI will display in the rear window of the unit

29
Q

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

A

Field book must be signed and logged

30
Q

What displays in the rear window when LIDAR is turned on?

A
  • Internal self-tests
  • Pass or fail
  • Time until recertification
  • SEGMENT ILLUMINATION
  • CONDUCT SELF TEST
  • EEPROM
  • TIMER
  • CRYSTAL
  • FIRMWARE
  • CERTIFICATION
31
Q

What should be done in the event of internal test failure?

A

Turn off and on, replace batteries, if persists forward to REU

32
Q

What care should be taken for the lens?

A
  • External optical surfaces are coated glass
  • Store in provided case
  • Avoid scratching
  • Do not point laser at the sun
33
Q

What are the laser don’ts?

A
  • 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
Q

When should LIDAR not be used in certain locations?

A
  • 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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