TIDUF89 September   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Detection Theory
    2. 1.2 Multi-Pass Architecture
  8. 2System Overview
    1. 2.1 System Design Theory
      1. 2.1.1 Long Detection Range
        1. 2.1.1.1 Antenna Design for Long Detection Range
        2. 2.1.1.2 SNR Compensation for Long Detection Range
        3. 2.1.1.3 Smart Detection Logic
      2. 2.1.2 Low Power Consumption
        1. 2.1.2.1 Efficient Chirp Design
        2. 2.1.2.2 Deep Sleep Power Modes
        3. 2.1.2.3 Hardware Accelerator
      3. 2.1.3 Low False Alarm Rate
        1. 2.1.3.1 Typical Causes of False Alarms
        2. 2.1.3.2 False Alarms Outside the Detection Zone
        3. 2.1.3.3 False Alarms Within the Detection Zone
        4. 2.1.3.4 Adaptive State Machine
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
    3. 3.3 Test Setup
      1. 3.3.1 Test 1 - Detection Range
      2. 3.3.2 Test 2 - False Alarm Rate
      3. 3.3.3 Test 3 - Power Consumption
    4. 3.4 Test Results
  10. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
  11. 5Tools and Software
  12. 6Document Support
  13. 7Support Resources
  14. 8Trademarks
  15. 9About the Authors

3.3.2 Test 2 - False Alarm Rate

This test occurs in a large empty space, which can be a parking lot, open field, or a large room. Mount the radar and test setup securely to prevent the equipment from moving in the wind. Note the percentage of time spent in each mode, and the number of times the radar falsely awakens the camera.

TIDEP-01035 False Alarm Rate Test - Empty Scene Figure 3-5 False Alarm Rate Test - Empty Scene

The False Alarm screen in the Industrial Visualizer displays the relevant information in the table on the bottom. The shading on the top indicates the proportion of the false alarms that originate from that region (more red = higher percentage of false alarms).


TIDEP-01035 False Alarm Rate Test - Visualizer View

Figure 3-6 False Alarm Rate Test - Visualizer View

Testing performance in more crowded environments can lead to more false alarms. TI has found that a combination of velocity, SNR and height filters work particularly effectively in denser scenes.