E-bike power delivery optimised with Pedal force sensor

ZEMIC e-bike

Variohm Eurosensor is supplying specially developed force sensors to be used on electric bike pedals to control auxiliary power delivery.

Load cell, strain gauge and force sensor manufacturer, ZEMIC, has developed an electric bike pedal force sensor in conjunction with the Netherlands firm SPARTA, a European e-bike brand. The sensor is a crucial component in the bike’s drive and control system that detects the pedal force applied, and through software settings determines a proportional amount of assisted motor power at the wheel. Rather than a speed sensor, this control gives the rider a more intuitive riding experience with increased efficiency and longer battery life. The e-bike has several settings including Cruise, Tour and Sport.

ZEMIC, who is represented exclusively in the UK by Variohm EuroSensor, worked closely with SPARTA from the outset to prototype, develop and mass-manufacture a competitively priced customised sensor for this cost-conscious and rapidly expanding market. In the European Union, 1.35 million e-bikes were sold in 2014, almost double the 2011 sales. The sensor was developed with the EBCC (Electric Bike Competence Centre) of the Accell Group whose members include many globally recognised bike brand names including Raleigh and Diamondback in the UK.

Variohm has been working with ZEMIC since 2008 and provides complete technical support and a full sales service across its wide range of load and force sensors with capacities from a few hundred grams to more than 500 tons. Product families include single point cells, compression cells, S-type, shear beam and spoke type load cells together with complete weighing assemblies, separate strain gauge circuits, junction boxes, mounting accessories and electronics.

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