Design and Calibration of an Instrumented Seat Post to Measure Sitting Loads while Cycling

Sensors
Dieltiens SienMark Versteyhe

Abstract

Traditional instrumented seat posts determine context-induced seat loads to analyze damping properties. This paper presents an enhanced instrumented seat post able to measure all six load components to resolve user-induced seat loads. User-induced cycling loads consist of all loads the user applies to the bicycle during cycling and is measured at the steer stem, the seat post, and the pedals. Seat loads are essentially uncharted territory, as most studies only address pedal loading to study cycling technique. In this paper, a conventional seat post is redesigned by equipping it with a u-shaped component and strain gauges. The instrumented seat post is straightforward thanks to (i) the simple design, (ii) the gravitational calibration method, and (iii) the permitted clearance on the strain gauge alignment. Analyzing mean seat loading in function of the pedal cycle can provide extra insights into cycling technique and the related injuries. It is an interesting addition to the universally adopted method of utilizing singular pedal loads.

References

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Apr 1, 1997·Acta Neurologica Scandinavica·K V Andersen, G Bovim
Aug 22, 2007·Clinical Biomechanics·Chisom Wilson, Tamara Reid Bush

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