Introduction
Sitting on the front of the chair seat and touching the top of the chairback seems to be a good “bad posture” pattern. If system could detect pressure on such parts of the chair, we could remind the user to adjust the sitting posture.
Objectives
Aim: Improve user sitting posture at the desk
Main Objective: Detect bad sitting posture and notify the user
Secondary Objective: Detect long period of sitting and suggest streching / break time
Bonus Objective: Generate adjustable heat from the seat
Personal Objectives: Experience, Learning (electronic, DIY ,3D Printing)
Main Requirements:
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Security (no fire)
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Confort (no feel of any device while sitting)
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3D Printed elements when possible
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Customization (sensor sensitivity, replacable chair seat ?)
Identifies difficulties
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Avoid setting the chairseat on fire
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Accuracy in bad posture detection (should not consider every move as matching a bad posture pattern)
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Power (batteries or wires to the desk)
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Manage human physiological differences ( short/long legs, light/less light people, large / tight bottom, feet touching floor or not…)
Main steps
Related to main objective
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Definition of bad & good posture pattern on chair seat and chairback
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Define sensors to detect patterns with real user sitting
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Notify bad posture in potential various ways
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Bluetoothly activated LED on the desk
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Vibration from the seat
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Electric shock (really motivated people)
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Related to secondary Objective
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Timer that counts sitting time
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Notify long period of sitting
Related to bonus objective
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Find heat generation system
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Adapt it to the chair
Main parts to build
The system will be composed of :
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Weight distribution sensors integrated in the chair seat and the chairback.
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Wireless data exchange module
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Vibration generators
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Heat generator