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

4.1 Response Time

IEC 61496-5:5.2.2.1

IEC 61496-5:5.2.2.2

It is important for a safety sensor to be fast to report a detection within a safety zone. The response time in this test must be verified that to be lower than the response time declared by the specifications, using worst-case conditions and movement. For this test the 0.14m2 CR* was used with static residual movement. The standard states that the recorded time must be lower than the response time declared by the supplier. This means that you must specify the minimum response time for your system.

An approximate 100 millisecond response time needed for there to be enough points to trigger a real detection and flip the zone to occupied was achieved. All processing is done on the IWR6843 chip. This response time can be further improved to be under 100 milliseconds with a low noise environment and due to the time needed to change the zone to occupied is configurable. For video footage of this test, visit the Radar Toolbox version of this document that includes embedded videos.

Before MotionBefore Motion
Figure 4-1 Screenshots From the Response Time Video Showing the Before and After Static Residual Movement Begins
After MotionAfter Motion