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

2 TI mmWave Radar and Functional Safety

The IWR6843 device is TI's high performance, functional safety certified, mmWave radar sensor. This sensor is supported by a wide range of evaluation tools, including hardware in the form of evaluation modules (EVMs) such as the IWR6843ISK and IWR6843AOPEVM, as well as software via the examples found within the Radar Toolbox that are open source and can be used to replicate the content of this document.

In addition to the hardware and software tools available for TI mmWave products, the IWR6843 is already certified by TÜV SÜD for hardware integrity up to SIL 2 and systematic capability up to SIL 3 with accordance to IEC 61508. IEC 61508 is a risk-based standard, meaning the level of danger in hazardous environments is evaluated, and the appropriate safety measures are defined to avoid or control systematic failures in addition to detect and control random hardware failures and mitigate their effects. In contrast, IEC 61496-5 is for frequency-modulated continuous-wave (FMCW) radar devices that are in non-contact electro-sensitive protective equipment (ESPE) and assuring that appropriate safety-related performance is achieved. With IEC 61496-5 being a radar performance based standard, the testing in this document follows its scope and does not address certain topics required in IEC 61508. For this reason, the testing done did not use specific diagnostics and monitors, nor a safety variant version of the IWR6843AOPEVM.

For more information on functional safety, IEC 61508, and general steps taken in order to develop a functionally safe system, see the Design Guide for Functional Safety Compliant Systems Using mmWave Radar Sensors