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smart-jacket-fall-detection-en.md

Wearable Lifesaver: The Fall Detection Jacket

The Smart Jacket for Fall Detection is a life-saving application of Human Activity Recognition (HAR). It is designed for elderly care or extreme sports, using gravitational math to detect the sudden impact of a dangerous fall.

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Acceleration Math

An MPU6050 (Accelerometer + Gyroscope) is sewn into the jacket.

  1. Normal Walking: The sensor measures standard 1G (gravity) pulling straight down toward the earth.
  2. The Fall: During a fall, the accelerometer registers chaotic spikes (e.g., hitting the floor can register a sudden spike of 3G or 4G).
  3. The Orientation Change: Crucially, after the impact spike, the gyroscope detects that the person is now lying horizontally (Pitch/Roll is ~90 degrees) instead of standing vertically.
  4. The Algorithm: if (impact > 3G && orientation_is_flat_for_10_seconds), the Arduino triggers the alarm.

The Hardware Implementation

  • Arduino Nano 33 BLE or ESP32: Small, lightweight, and internet-enabled.
  • MPU6050 6-Axis IMU.
  • GSM Module (SIM800L) or Wi-Fi: To send an SMS text message or push notification to the caregiver.
  • Piezo Buzzer: An audible alarm to alert people nearby.

This project introduces you to the concept of Wearables, shifting your focus from rigid plastic boxes to flexible wiring and battery management.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Smart Jacket for Fall Detection (Healthcare)"
description: "Wearable safety tech! Sew an IMU sensor into clothing to automatically detect if a patient has fallen and send an emergency alert."
category: "Health & Wellbeing"
difficulty: "Advanced"