Design Team 5 Lowering Standby Power Consumption Via Proximity Detection Kevin Harrison Leslie Hodges Eric Hosey Nathan Kelly Berna Saracoglu

Anticipated ENERGY STAR standard –Appliances need to operate under one watt in standby mode –Current appliances do not utilize standby mode –Standby mode would diminish customer experience Need to smoothly enter and exit an energy ethical standby mode to lower energy consumption The Problem

Detection of user presence –Implement a variety of sensors for in room and potential appliance use detection Low-to-mid range and High-end options –Laundry and kitchen appliances –Cost differences –User experience When you walk into your kitchen, your kitchen turns on Our Goal

Power –Less than 1 watt in standby mode Size –Fit aesthetically into appliance and room Cost –Limitations dependant on appliance price Flexibility –Adapt intelligently to different environments –Current and future appliances Accuracy –Not interfere with appliance functionality –Not susceptible to interference Safety –Product used by general public Design Specifications

Low-to-Mid Range Two sensors –Passive infrared (PIR) sensor Monitors room for user presence –Active infrared (IR) sensor Monitors for potential use of appliance Integration –In standby mode PIR will monitor room –Detection of user will turn on IR sensor –Detection of potential use will exit from standby mode Design Solutions

High-End Two sensors –Passive infrared sensor Monitors room for user presence –Ultrasonic sensor Capable of calculating user proximity Information density Integration –In standby mode PIR will monitor room –Detection of user will turn on ultrasonic sensor –Will exit standby mode as user approaches appliance Design Solutions

IR Sensor Very low cost Detection up to 4 ft –Very little span Consumption less than 0.2 W No false triggers Ultrasonic Sensor Detection up to 20 ft –Span of appliance width 10 mW consumption Susceptible to false-on triggers from air motion Sensor Selection

PIR Sensor Power consumption of 0.5 mW Very low cost Detection up to 20 ft –180° hemispheric detection Resistant to false-on triggers Ideal for both design solutions Sensor Selection

Expected 1 watt standard Currently can save 35% with refrigerator user interface Power Consumption

Voice commands –Physically disabled –Safety Voice announcements –Visually impaired –Appliance status LCD solution –More common in future –Proximity sensing improves power consumption and marketability Future of Product

Questions ?