SWRA825 January   2025 IWR6843 , LP87745-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Regulatory Needs for Electro-Sensitive Protective Equipment (ESPE)
    2. 1.2 Different Types of Electro-Sensitive Protective Equipment (ESPE)
  5. 2Advantages of Radar Sensors in Industrial Applications
  6. 3Safety Concept Evaluation/Analysis
    1. 3.1 System Requirements
      1. 3.1.1 Stationary Use Case
      2. 3.1.2 Mobile Use Case
    2. 3.2 Considerations for Sensing Architectures
      1. 3.2.1 System Level Architecture
        1. 3.2.1.1 Bi-Static With Spatial Diversity
        2. 3.2.1.2 Co-Located Bi-Static (Two Sensor Products)
        3. 3.2.1.3 Co-Located Bi-Static (Single Sensor Product, Dual IWR6843)
        4. 3.2.1.4 Mono-Static (Single Sensor Product, Single IWR6843)
        5. 3.2.1.5 Summary
      2. 3.2.2 Latent Fault Monitoring
    3. 3.3 Sensor Level Architecture
      1. 3.3.1 Sensor Level Architecture for CAT 2
      2. 3.3.2 Sensor Level Architecture for Cat 3
  7. 4IEC TS 61496-5 Functional Test Results
  8. 5Other Considerations
    1. 5.1 Vibrations
    2. 5.2 Clock
  9. 6Conclusion
  10. 7References

3.1.2 Mobile Use Case

For a mobile use case, consider an example for an autonomous mobile robot (AMR) that is used to transport goods in a warehouse. The environment is dynamic, with workers frequently moving around. The goal is to prevent collisions and ensure worker safety without compromising the robot's operational efficiency. The radar sensor can be configured to create multiple detection zones. As shown in Figure 3-6, within the yellow “Slow down zone” it detects objects or people at a moderate distance, prompting the AMR to slow down and issue visual or audible alerts. Within the red “Stop zone” it detects closer proximity, triggering an immediate stop to avoid collisions.

Mobile robot (Safe Human Presence Detection) Figure 3-6 Mobile robot (Safe Human Presence Detection)

ISO 3691-4 standard defines the safety requirements and verifications for driverless industrial trucks, including AMRs.

According to ISO 3691-4 the safety-related parts of the detection of persons in the intended path of an autonomous mobile robot shall comply also with IEC 61496.

The mobile robots shall be fitted with ESPE for the detection of persons and the minimum required PL according to ISO 13849-1 is PL d.