Sensing and Control Overview - TT electronics Showcase

ATM Cash Dispenser Machine: Currency note validationCustomer Challenge– Inaccurate detection of note positionTT electronics– Sometimes two notes stick together and aredispensed instead of only one– Dispensing more than the required amount ofnotes– Need to verify that processed note is genuineand not damagedSensing and Control SolutionIndustrial– Accurate note position detection– Edge detection optical sensor– Encoder feedback to enhanceaccuracy– Accurate note counting– Measure light transmission to verifyonly one note is processed– Verification that correct note isprocessed– Accurately measure sensor output todetermine valid currencyCritical application – costly failure mode©2013 TT electronics plc 18