EPSRC Energy Harvesting Network

Human Motion - Lower Leg


Energy Source: Vibration
Application: Human
Specific Location: Outside of lower leg near ankle
Data Duration: 12m 18s
Data Frequency: 2048 Hz

Abstract: The volunteer is average height and average weight (180 cm and 82 kg). The data logger was tied to the body using self-adhesive support bandage (7 cm wide, 4 m long) rolled on under tension. The tests were carried out on one of the University gym's treadmills at three distinct speed settings: slow walk (1 kph), normal walk (3.5 kph), and light jogging (6.5 kph). Data was recorded for approximately 2 minutes at each speed. Potential limitations of the tests include the suspension system of the treadmill, the architectural design of the floor of the gym (allowed to move slightly), and the vibration caused by nearby runners. The tests were carried out in a quiet period, when the usage of the gym equipment was low. The data streams are included in .mat file, titled with the location of each data segments. There are 7 columns of data that represent: time (in seconds), x-axis raw data (in mV), y-axis raw data (in mV), z-axis raw data (in mV), x-axis acceleration (in g), y-axis acceleration (in g), and z-axis acceleration (in g). 1 kph 2 minutes, (4 people running nearby...); 3.5 kph 2 minutes; 6.5 kph 2 minutes. After the 6+ minutes of testing, speed is stepped up by 0.5 kph from 6.5 to 15 kph every 15 seconds (15 s continuous running then around 3 seconds to adjust speed). Data is saturated at high speeds (after ~ 480 seconds). Features: a) 1 kph: 18.5 - 155 seconds b) 3.5 kph: 168 - 320 s c) 6.5 kph: 330 - 445 s d) Y-axis goes into saturation around 480 seconds

Acknowledgement: If you use this data, please:
  • acknowledge 'University of Bristol/University of Southampton, "Next Generation Energy-Harvesting Electronics: Holistic Approach" [online]. Available: http://www.holistic.ecs.soton.ac.uk/',
  • specify that the data was "Downloaded via The EH Network Data Repository (http://eh-network.org/data)".
Link to Data: http://www.holistic.ecs.soton.ac.uk/data/human_lowerleg/data.zip
Link to Further Information and Analysis: http://www.holistic.ecs.soton.ac.uk/data/human_lowerleg/data.php

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