Wireless Test Instrumentation for Rotating Parts ECE 193 Advisor: - - PowerPoint PPT Presentation

Wireless Test Instrumentation for Rotating Parts

ECE 193 Advisor: Rajeev Bansal Olivia Bonner David Vold Brendon Rusch Michael Grogan ME 32 Advisor: Robert Gao Kyle Lindell Andrew Potrepka

Sikorsky Contacts

• Company Advisor: Paul Inguanti

pinguanti@sikorsky.com

• Senior Test Engineer: Chris Winslow

cwinslow@sikorsky.com

• Test Instrumentation Engineer: Daniel Messner

daniel.messner@sikorsky.com

Overview

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— Problem Statement — Proposed Solution — Timeline — Setbacks — Solutions — Testing — Risk — Updated Timeline and Budget


Problem Statement

— Wirelessly transmit data

from sensors in a rotating compartment

¡ Must fit within 5” length by 1.5”

diameter cylindrical compartment

¡ Data from at least two sensors ¡ Range of at least 40 feet ¡ Must be able to operate for at

least one year without needing service

¡ Must be able to operate after at

least one month of inactivity

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Proposed Solution

— Arduino Nano — RN-XV WiFly module

(Wi-Fi transceiver)

— 1000mAh Li-Po battery — DC generator with

counterweight for energy harvesting

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Proposed Solution

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Setbacks

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— Spatial Concerns

¡ Breakout board for connecting Arduino to Wi-Fly module must

be eliminated

¡ Larger geared generator and counterweight are too large

— 5V logic vs. 3.3V logic incompatible

¡ Some sensors are incompatible with the logic levels used by

the Nano.

Spatial Issue

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Arduino Nano – XBEE WiFly Breakout Board

Solutions

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— Arduino Pro Mini vs. Arduino Nano

Testing

— Testing sensor functionality (ECE) — Battery charging and discharging (ECE) — Generator output voltage and noise (ME)

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Sensor Testing

— One of the accelerometers (ADXL362)

uses 3.3V digital logic, not compatible Nano’s 5V digital logic

¡ Compatible with Arduino Pro Mini as

• perating voltage is 3.3V

— Another accelerometer (ADXL335) was

purchased, compatible with Nano

¡ Ratiometric analog voltage output makes

simple interface with 5V microcontroller

— Remaining sensors compatible with

Nano

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Sensor Testing

12 ADXL362 ADXL335 Electret Microphone Temperature Sensor Infrared Thermometer 3.3V digital logic Ratiometric analog output voltage 2.7V-5.5V

• perating

voltage 2.7V-5.5V

• perating

voltage 3V operating voltage

Sensor Compatibility Overview

Battery Testing

— 850mAh and 1000mAh purchased and tested — Charging and discharging tested to ensure

proper functionality

¡ Will immediately begin testing for 1 month inactivity with

dummy load to represent Arduino and Wi-Fly in sleep mode

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Battery Testing

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Discharge Circuit Test

Battery Testing

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Discharge Analysis

Generator Testing

— Larger geared generator

• utputs 12V at 1200rpm

— Smaller generator outputs

3V at 1200RPM

— Testing showed that

66micro-Farad capacitance across generator leads brought noise to an acceptable level

Unfiltered output (4v fluctuations)

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Filtered output (<1v fluctuations)

Wireless Communication

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— Connected to a laptop via wifi. — RN-XV transmits data from the UART serial port. — Currently can receive commands wirelessly to start

sampling and sending data from a few sensors.

— Eventually able to enter and exit sleep/low power

modes via remote command.

Wireless Accelerometer Sampling

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Upcoming Testing

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— Connect Wi-Fly Module to Arduino without break

• ut board

— Order layout of components and decide whether to

use existing capsule

— Verification of wireless signal

¡ Transmit a known signal and compare transmitted signal to

• riginal

Worst Case Scenarios

— (1) System: two sensors, energy harvesting, without

fulfilling spatial restrictions


— (2) System: fulfill spatial requirements, 2 or more

sensors, without energy harvesting system or sufficient battery life

¡ Connect battery cells in parallel to extend battery life

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Team Timeline

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Budget

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Part ¡ Cost ¡ Switching circuit demo board ¡ $ 75.00 ¡ Li-Po Chargers ¡ $ 96.70 ¡ Battery Connectors ¡ $ 19.00 ¡ Batteries and Generators ¡ $ 142.70 ¡ Electronics Package ¡ $ 287.97 ¡ Wi-Fly Module ¡ $ 24.95 ¡ Total Cost ¡ $ 646.32 ¡

Questions?

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