Appendix

Table 1 - Minimum Performance Specifications for Lidar
Speed-Measuring Devices and Systems

Performance Characteristic
Minimum Requirement
Section
Wavelength of pulsed laser* Infrared §1.3
Pulse repetition rate* = 390 Hz §2.2.12
Pulse repetition rate variation* = 0.1 % §2.2.12
Low supply voltage† = 10.8 V §2.8
Horizontal functional beamwidth = 5 mrad §2.6.3
Vertical functional beamwidth = 5 mrad § 2.6.3
Display readability Easily readable when used as intended §2.10.1
Maximum low speed 16 km/h (10 mph) §2.10.5.1
Minimum high speed 320 km/h (200 mph) §2.10.5.2
Speed accuracy +2 km/h, -3 km/h (+1 mph, -2 mph) §2.11
Speed error trapping Periodic sawtooth perturbation: 200 ms, 1.52 m (5 ft) peak §2.11.2
Long Range 300 m (1,000 ft) minimum §2.5
Range Accuracy +0.3 m (+1 ft) §2.4
Vehicle Determination Documented with a recorded image (or images) §2.16

* Not a functional requirement, but relates to the present limitations of the test instrumentation, in particular the target speed simulator The manufacturer may be required to provide test equipment (§2.1) if these specifications are exceeded.

† Applicable for lidar units that can be powered from a nominal 12 V automotive system. Self-powered units have a different minimum specification for low supply voltage (§2.8).

Figure 1. Block diagram of the target simulator

figure 1 - click [d] for long description[d]

Figure 2. Schematic of the test range for the target distance feature

figure 2 - click [d] for long description[d]

Figure 3. Block diagram of the pulse-sawtooth coupling circuit
figure 3 - click [d] for long description[d]

Figure 4. Oscillogram of a rectangular pulse, coupled through the circuit of figure 3 into
the 10 W dummy load

figure 4 - click [d] for long description [d]

Figure 5. Block diagram of the line impedance stabilization network (LISN)

figure 5 - click [d] for long description[d]

Figure 6. Schematic of the long-range target apparatus

figure 6 - click [d] for long description[d]

Figure 7. Schematic of the beam characterization apparatus

figure 7 - click [d] for long description[d]

Figure 8. Block diagram of the low voltage test circuit

figure 8 - click [d] for long description[d]

 

Figure 9. Block diagram of the radio-frequency test circuit

figure 9 - click [d] for long description[d