SENIOR ADVANCED DESIGN PROJECT Cooling humidifier umbrella for lung cancer and multiple sclerosis patients Presented by Christopher R Aitken, Christopher J Barry, Jaime Martinez Diaz, Jason J Schwarzwalder, Yizhe Wang, Yunke Chen 1
The problem Approximately 300,000 people are living with multiple sclerosis in the US [1] ● Approximately 500,000 people that are currently living have been diagnosed at ● some point in their life with lung cancer in the US [2] ● These diseases cause breathing ailments that can dictate people's lives 2
User’s requirements Easy to use ● Sample user interface ○ The external water tank shall be easily refillable ○ Keep the user cool underneath ● ○ The device shall shade an area with lowered temperature to 65-70 °F. The device shall provide humidified air within 30% - 60% relative humidity for the user. ○ ● Implement Solar panels Within a safe transmission voltage. ○ Light weight ● ○ Around 1.5 lb. 3
Existing patents Sun-rain umbrella with humidifier [3] All parts at the base of the umbrella Ultrasonic transducer to create vapor Fan pushes vapor up the shaft and out the nozzle under the canopy Bulky base – not easily portable CN103892540A 4
Existing patents Umbrella with humidification function[4] Ultrasonic atomizer to create vapor Humidifier snaps onto the umbrella to be placed where desired An infrared remote as well as power switch used to turn humidifier on/off CN202819897U 5
Existing patents Bionic leaf humidifying sunshade umbrella[5] Ultrasonic humidifier to create vapor Double layered canopy material serves as UV protection Small humidifier CN201709596U 6
The solution An umbrella that has a built in humidifier ● A water tank that will store the water for the user ● ● A cooling system that could incorporate a fan to use evaporative cooling A microcontroller that will be able to automatically regulate humidity ● Solar panels with a back up battery to power the umbrella ● 7
Cooling System Evaporative Cooling[6]: ● Heat from skin evaporates the sweat lowering the average kinetic energy on skin ● Lower kinetic energy reduces the temperature ● Effectiveness can be increased using a fan Swamp Cooler: ● Reduces the temperature by increasing the relative humidity ● Typical used in high temperature and low humidity ● Operation: ○ Evaporative pad is used as a median to evaporate the water ○ Water distribution keeps evaporative pad damp ○ Fan pulls in hot air and exhaust cooler air into environment Reflective Material[7]: ● Preventing heat absorption from the canopy of the umbrella ● Aluminum or a space blanket is able to reflect UV-rays and prevent heat absorption 8 due to its reflective index
Cooling System Cooling Projection: [7 ] ● Psychrometric chart: a visual representation of how relative humidity affects the temperature ● Based on the wet and dry bulb, temperature may be adjusted by increasing the relative humidity ● Maximum usage Temperature: ○ 96 ℉ at 50% relative humidity 9
Cooling System Flow Chart: Operation of the Cooling System 10
Cooling System Atomizer: Spread water drops in the air [8] [9] [10] [11] [12] ZM-Atomization-20mm [11] 11
Cooling System Water Pump: Pump water to the humidifiers Vipe Mini Water Pump [13] [13] [14] [15] Bringsmart DC Water Pump [14] 12
Cooling System Motor: Drive the fan(s) 8520 Coreless Brushed Motor [16] [16][17] DC Toy/ Hobby Motor - 130 Size [17] 13
Data Receiving and System Control Raspberry Pi Zero [18] ● Designed to be user friendly with a vast amount of tutorials online ● Prebuilt onto a PCB, only soldering required for components MSP430 [19] ● Lower power consumption with multiple low power modes Power Pins Price Clock Speed RAM ● Cheaper but requires a PCB to be built ● Low amount of RAM could become an issue Max Voltage Current Idle (A) Active (A) Watts (W) (V) (mA) (MHz) (B) Raspberry Pi Zero 0.1 0.35 1.75 3.3 16 $5 1000 512 M MSP430 0.5 u 230 u 0.22 m 1.8-3.6 2 $2 16 256/512 14
Humidity and Temperature Detection AM2302 [20] A bigger version of the DHT22 that has an external casing ● ● Already has the bridge resistor built into the sensor Power Range DHT22 [20] Active Idle Voltage Temperature (mA) (uA) (V) Price Size (mm) (°C) Humidity Accuracy Bigger and more precise version of the DHT11 ● ● Is usable within more ranges of temperature and humidity DHT22 1 40 3-5 $8.00 14 x 18 x 5.5 -40 to 80 0-100 ±(2-5) than the DHT11 AM2302 1 40 3-5 $9.99 27 x 59 x 13.5 -40 to 80 0-100 ±(2-5) DHT11 [21] DHT11 0.5 100 3-5 $5 12.6 x 5.83 x 16 0 to 50 20-90 ±5 Least precise sensor but also costs the least ● ● Will use less power while active but consumes slight more while idle 15
Power System How they work: Silicon material composed of several photovoltaic cells Photons from the sun’s rays hit photovoltaic cells, exciting the electrons, knocking them free of their atoms 16
Power System 17
Power System Uxcell’s Mini Solar Cells[22] Polycrystalline silicon material 7V, 50mA, 93mm x 30mm, 10g 18
Power System Samsung 50E Lithium Ion Battery (Primary) [23] 5000mAh capacity, 9.8A continuous discharge rating, 3.6 nominal voltage, 70.8mm (length) x 20.25mm (diameter), 69g “Backup” power when solar panels can’t supply enough voltage High energy density 36 Wh, Total power = 8.775W, 4.1 hours lifetime 19
Power System Tenergy NiMH Battery (Secondary) [24] 2600mAh capacity, 1.2 volts, 50.5mm (length) x 14.5mm (diameter), 26.5g 0.5A discharge rating Less energy density Takes up more space Safer for charging from solar panels 20
Power System Diode Circuit: Acts as a voltage comparator to determine whether the solar panels or battery power the umbrella Current-limiting regulator will prevent the solar panels from overcharging the battery to prevent an damage 21
Umbrella Construction Bubble Umbrella[26]: 22
Umbrella Construction Double Canopy Umbrella[27] 23
Umbrella Construction ● The way to assemble umbrella with other components: ○ 3D prints ■ Software: Cura ● Free use on campus ■ Filament: Polylactic acid(PLA) ● Food safe material ● Friendly for patients ● High melting point 24
Umbrella Construction Expected part needed to be 3D printed: ● Ferrule ● Water container to umbrella base ● Mounts for sensors ● Fan blades 25
Umbrella Construction 3D prints: ○ ■ Ferrule: 26
Umbrella Construction Water Bottle Connector 27
Main Design 28
Alternative Design 29
Project Gantt Chart 30
References [1]Mitchell T. Wallin, William J. Culpepper, Jonathan D. Campbell, Lorene M. Nelson, Annette Langer-Gould, Ruth Ann Marrie, Gary R. Cutter, Wendy E. Kaye, Laurie Wagner, Helen Tremlett, Stephen L. Buka, Piyameth Dilokthornsakul, Barbara Topol, Lie H. Chen, Nicholas G. LaRocca Neurology Mar 2019, 92 (10) e1029-e1040; DOI: 10.1212/WNL.0000000000007035 [2]Howlader N, Noone AM, Krapcho M, Miller D, Bresi A, Yu M, Ruhl J, Tatalovich Z, Mariotto A, Lewis DR, Chen HS, Feuer EJ, Cronin KA (eds). SEER Cancer Statistics Review, 1975-2016, National Cancer Institute. Bethesda, MD, http://seer.cancer.gov/csr/1975_2016, based on November 2018 SEER data submission, posted to the SEER website, April 2019. [3]Patents.google.com. (2019). CN103892540A - Sun-rain umbrella with humidifier - Google Patents. [online] Available at: https://patents.google.com/patent/CN103892540A/en [4]Patents.google.com. (2019). CN202819897U - Umbrella with humidification function - Google Patents. [online] Available at: https://patents.google.com/patent/CN202819897U/en [5] A. Bhatia, “Evaporative Cooling Design Guidelines,” p. 109. [6] What Are Evaporative Coolers? Here’s Everything You Need to Know," newair[Image]. Available:https://www.newair.com/blogs/learn/what-are-evaporati [7]Lottie F.. Kuijt-E, Reinier K, M. Susan H, “Effect of canopy shape on physical load when holding an umbrella”, Applied Ergonomics,, 2013, Pages 142-150, ISSN 0003-6870,[Online] https://doi.org/10.1016/j.apergo.2012.06.003. [8]Dongguan Zhongmai Electronic Co., Ltd. , 10mm 160KHz Ultrasonic Atomization Microvoid Atomization, [Online] http://www.zhongmaidz.com/en/displayproduct.html?id=2323069083829696 [9]Dongguan Zhongmai Electronic Co., Ltd. , 13.8mm 155KHz Ultrasonic Atomization, [Online] http://www.zhongmaidz.com/en/displayproduct.html?id=2323063975593408 31
Recommend
More recommend
