2
User Research
Through our research, we found two key areas where posture management could be improved: people’s unconscious poor posture during prolonged sitting and their inability to stay aware of posture due to deep concentration on work or study.
That is, when people focus intensely, they often lose awareness of their sitting posture, leading to unhealthy alignment over time.
Define pain points
Through brainstorming, we found two feasible solutions.
Firstly, to improve users’ posture awareness through real-time sensing and intuitive feedback.
Secondly, to provide gentle, adaptive physical
support using an intelligent air-bladder system that helps users naturally return to a neutral sitting position.
prototype
Flowchart Steps
2.The main loop loop() starts
3.Detection logic
Control airbag inflation or deflation based on left or right tilt to adjust posture.
Load libraries, set pins, and define thresholds for detecting and adjusting posture abnormalities.
Continuously collect X-axis acceleration data to determine posture (forward, backward, or neutral).
倾斜（系统 1）检测和充气控制
恢复正常坐姿（前倾放松）
倾斜（系统 2）检测和充气控制
恢复正常坐姿
4
1. Define and initialize the region
3. Detection Logic
1
43
2. The main loop loop() starts
3
Micro 3V solenoid valve
micro air pump
Product principle
Driver board
solenoid valve
Relay
MPU6050 six-axis sensor module
18650 battery case
rduino Pro Micro
The system is controlled by an Arduino Nano, integrating MPU6050 posture detection, relay control, and battery power supply to achieve portable posture correction.
Coding and Test
The electromagnetic valve works in conjunction with the air pump to correct posture in real time.
The airbag is the core actuator that interacts with the user, gently correcting bad posture through inflation.
1.Define and initialize area
T12
With device
Without device
T1
20
40
60
80
100
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
Leg-crossing count
With SITGUARD, leg-crossing events drop significantly vs. no device—a clear, consistent reduction that shows it effectively curbs poor-posture behavior.
After 4 hours, comfort skews high (most >7/10) with no discomfort outliers—nudges are gentle, low-disruption, and long-wearable.
User experience testing
SITGUARD
@2025
Contact Us：
zaky79548@gmail.com
Support:
Shaanxi University of Science and Technology
A wearable device that targets poor sitting posture, designed to help people who sit for long periods build better habits.