SLAAE30 July   2021 MSP430FR2355

 

  1.   Abstract
  2.   Trademarks
  3. 1PIR Design Description
    1. 1.1 PIR Sensor
    2. 1.2 PIR Signal Chain
      1. 1.2.1 Traditional Motion Detection Signal Chain Design
      2. 1.2.2 Capacitor-Free Signal Chain Design
  4. 2Software
    1. 2.1 Software Architecture
    2. 2.2 Software Flow Chart
    3. 2.3 Power Profile
    4. 2.4 Data Processing
      1. 2.4.1 Digital Signal Conditioning
      2. 2.4.2 Low-Pass Filter for Temperature Drift
      3. 2.4.3 Spikes and Noise
      4. 2.4.4 Motion Detection Function
  5. 3Hardware and Schematic
    1. 3.1 MSP430FR2355
    2. 3.2 Schematic
  6. 4Results
    1. 4.1 Distance: 15 ft (4.5 m)
    2. 4.2 Distance: 22.5 ft (6.9 m)
    3. 4.3 Distance: 36.5 ft (11.1 m)
  7. 5Summary
  8. 6References

4.2 Distance: 22.5 ft (6.9 m)

Motion event amplitude have gone down, but motion events and direction back and forth can still be determined for both adult and child.

GUID-270F31F2-0535-4CDC-887B-18F354D3A1FF-low.png Figure 4-3 Adult at 22.5 ft (6.9 m), speed 1 m/s
GUID-003B54F5-7F26-4899-BF21-D54E5B006F78-low.png Figure 4-4 Child at 22.5 ft (6.9 m), speed 1 m/s