SPRAC03 July   2024 IWR6843

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2TI mmWave Radar and Functional Safety
  6. 3IEC 61496-5 Functional Tests
    1. 3.1 Testing With Static Residual Movement
    2. 3.2 Detection Zone
    3. 3.3 Tolerance Zone
  7. 4Results
    1. 4.1 Response Time
    2. 4.2 Position Accuracy
      1. 4.2.1 Angular Accuracy Error Margins
    3. 4.3 Coexistance of Several RPDs
    4. 4.4 Interference by Object Outside the Detection Zone
    5. 4.5 Interference by Object Inside the Detection Zone
    6. 4.6 Manual Interference
  8. 5Environmental Tests
  9. 6Covered by Other Tests
  10. 7Test Setup Details
    1. 7.1 Detection Algorithm
  11. 8References

4.4 Interference by Object Outside the Detection Zone

IEC 61496-5:5.4.7.1

When there is a target object inside the detection zone, an interfering target outside the detection zone must not interfere with the target object’s ability to be detected. For this test, Section 4.2.13.4 mentions a 40 m2 CR is used as the interfering target in order to ensure it does not absorb the small 0.17 m2 CR’s visibility. The test calls for the interfering target to be static in one test and dynamic in another. In the dynamic test, the interfering target is moving at the same static residual movement speed as the test target. The interfering corner reflector should not be able to disrupt the detection CR’s visibility, ensuring no disruption via outside objects.

Image of Setup Used for Interference by Object Outside the Detection Zone Functional Test Figure 4-4 Image of Setup Used for Interference by Object Outside the Detection Zone Functional Test
Interfering Target DynamicInterfering Target Dynamic
Figure 4-5 Comparison of Point Clouds for When the Interfering Target is Static (left) or Dynamic (right). In both Scenarios the Ability and Accuracy of Sensing the Test Target is Unaffected.
Interfering Target StaticInterfering Target Static

As seen above, the interfering target does not disrupt detection ability of the test target. While the interfering object is dynamic, there is still a clear distinction between it and the target, ensuring that the target is identified as inside the zone.