TIDUEY3 November   2020

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
      1. 2.1.1 Hardware Block Diagram
      2. 2.1.2 Software Block Diagram
        1. 2.1.2.1 mmWave SDK Software Block Diagram
        2. 2.1.2.2 Software Block Diagram of Application
    2. 2.2 Highlighted Products
      1. 2.2.1 AWR6843AOP
      2. 2.2.2 mmWave SDK
    3. 2.3 System Design Theory
      1. 2.3.1 Use-Case Geometry and Sensor Considerations
      2. 2.3.2 Low-Level Processing
      3. 2.3.3 High-Level Processing Details
        1. 2.3.3.1 DPM Model
        2. 2.3.3.2 Occupancy Detection State Machine
      4. 2.3.4 Output Through UART
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 Altium Project
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks

3.2.2 Test Results

Child Presence Detection

To simulate a child left behind, a baby doll capable of simulated breathing was positioned in various locations in the vehicle. The results of the various positions tested are as follows:

ZONE POSITION CAR SEAT ORIENTATION DETECTED?
2 Rear-facing Yes
3 Front-facing Yes
4 Rear-facing Yes
5 Front-facing Yes
Footwell of 3 n/a Yes
Footwell of 4 n/a Yes
Footwell of 5 n/a Yes
GUID-E1A70A79-45BA-42F0-B0B0-0699B7B1C858-low.png Figure 3-3 Child Presence Detection

Seat Occupancy Detection

Testing was performed for 2 person and 3 person with baby-doll use cases.

2-Person Occupancy was tested for various pairs of locations in the vehicle. The results of the various positions tested are as follows:

POSITION PAIRS DETECTED?
1 and 2 Yes
3 and 4 Yes
1 and 4 Yes
2 and 3 Yes
GUID-20201109-CA0I-QPH7-XFKJ-ZCWPRRKRZ5BQ-low.png Figure 3-4 Two Person Occupancy

3-Person Occupancy with Baby Doll was tested with each adult person entering the car separately. The results test are as follows:

ACTION SEQUENCE ZONE(S) DETECTED
A) Adult person in Zone 3 and Baby doll in Zone 5 Zones 3 and 5
B) Additional person sits in Zone 1 Zones 1, 3, and 5
C) Additional person sits in Zone 2 Zones 1, 2, 3, and 5
D) Zone 2 person exits Zones 1, 3, and 5
E) Zone 1 person exits Zone 3 and 5
F) Zone 3 person exits Zone 5
GUID-20201109-CA0I-LGNJ-ZN0G-C1N46HHJ4PF9-low.png Figure 3-5 3-Person Occupancy with Baby Doll

Intruder Detection was tested with no people/child in the car and only various inanimate objects including a book bag. Intruder zones were defined on the sides of the vehicle along the doors. The example image below shows the intruder detection functionality:

GUID-20201109-CA0I-S5RP-MZVJ-SPD4G8GST2V8-low.png Figure 3-6 Intruder Detection Example