US 2,006,020,177 · Filed 2005-07-25
Samsung's Step Counter Patent: The Accelerometer That Powers Fitness Trackers
Samsung invented a way to count your steps and measure calories burned using a tiny motion sensor that detects when you move. The sensor watches how your acceleration changes throughout the day and figures out when you've actually taken a step versus just waving your arm around.
The plain-English version
What it protects
The claim covers a complete system for converting raw movement data into step counts and calorie estimates. What's protected here is the specific method of using an acceleration sensor to measure motion, comparing the energy signals to predetermined thresholds to identify real steps, and then converting those validated steps into calorie consumption calculations. Any device that follows this same signal-processing pipeline—measuring acceleration, finding local peaks in the energy curve, validating peaks against a threshold, and converting to calories—would infringe on these claims.
Why it matters
This patent captures the core logic behind modern fitness trackers and smartwatches. Before reliable accelerometer-based step counting, fitness devices were either inaccurate or required manual input. Samsung's approach of using dynamic energy thresholds to distinguish actual steps from noise became a foundational technique for the entire wearables industry. The patent protects the mathematical and sensor-fusion methodology that lets billions of people track daily activity without GPS or external infrastructure.
Real-world use
Every Fitbit, Apple Watch, and Samsung Galaxy Watch uses this same acceleration-based step-counting method when you go for a run or walk through the grocery store.
Original USPTO abstract
Disclosed are a method for measuring quantity of exercise and an apparatus comprising an acceleration sensor for generating acceleration information by measuring the quantity of exercise according to user movement, sensor control unit for supplying power to the acceleration sensor and sampling the acceleration information generated from the acceleration sensor, a dynamic energy measurement unit for converting the sampled acceleration information into dynamic energy, comparing a local maximum value with a predetermined threshold value if an ascending gradient of the dynamic energy has the local maximum value exceeding a predetermined value and determining a user step if the local maximum value exceeds the predetermined threshold value, a calorie consumption measurement unit for calculating calorie consumption by analyzing an energy level of dynamic energy determined as a user step, a memory for storing information, and a display section for displaying information related to the number of steps and calorie consumption.
Patent details
- Publication number
- US 2,006,020,177
- Filing date
- 2005-07-25
- Grant date
- Application — not yet granted
- Assignee
- Samsung Electronics Co., Ltd.
- Inventor(s)
- SEO JEONG-WOOK, PARK WEI-JIN
- CPC class
- A63B24/0062
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