1.3: Remote AC/DC Voltage and Current Sensor Node

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1.3 Remote AC/DC Voltage and Current Sensor Node

• Sponsored By Freescale
• Sponsor Kevin Kemp
• Faculty Advisor William Stapleton

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Team Members
Vinh Diep Project Manager Embedded Systems
Engineer I
Francisco Saavedra Test Engineer Embedded
Systems Engineer II
Matthew Bringhurst Design Engineer
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Todays Presentation Covers

• Motivation
• Description of Project
• Roles Responsibilities
• Progress
• Plans for 2nd semester

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Systems Modeling and Renewable Technology (SMART)
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Remote AC/DC Voltage and Current Sensor Node
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Project Motivation

• The problem
• Wired Systems
• Expensive
• No complete system in place
• Why is this important?
• Remote monitoring
• Affordable
• Wireless reduces cost improves safety

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Sponsor Motivation

• Why Freescale?
• Continued collaboration between Freescale and
  Texas State University
• Develop a prototype and demonstrate functionality
  using Freescale development tools (Kinetis KW24
  TOWER board etc.).

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Project Overview

• Project Goals

• Create Low powered Sensing Node
• Capture both AC/DC Voltages and Currents
• Wirelessly transmit processed data to the
  Proximetry Cloud Server
• Updates values every 15 seconds

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Project Overview

• Project Goals

• Create Low powered Sensing Node
• Capture both AC/DC Voltages and Currents
• Wirelessly transmit processed data to the
  Proximetry Cloud Server
• Updates values every 15 seconds

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Project Overview

• Project Goals

• Create Low powered Sensing Node
• Capture both AC/DC Voltages and Currents
• Wirelessly transmit processed data to the
  Proximetry Cloud Server
• Updates values every 15 seconds

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Project Overview

• Project Goals

• Create Low powered Sensing Node
• Capture both AC/DC Voltages and Currents
• Wirelessly transmit processed data to the
  Proximetry Cloud Server
• Updates values every 15 seconds

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Project Overview

• Project Goals

• Create Low powered Sensing Node
• Capture both AC/DC Voltages and Currents
• Wirelessly transmit processed data to the
  Proximetry Cloud Server
• Updates values every 15 seconds

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Device Connection Example 1
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Device Connection Example 2
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Project Overview

• Stretch Goals

• Powered by Solar/Wind Turbine
• Auto-range capabilities
• Single PCB Design

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Project Overview

• Stretch Goals

• Powered by Solar/Wind Turbine
• Auto-range capabilities
• Single PCB Design

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Project Overview

• Stretch Goals

• Powered by Solar/Wind Turbine
• Auto-range capabilities
• Single PCB Design

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Project Overview

• Stretch Goals

• Powered by Solar/Wind Turbine
• Auto-range capabilities
• Single PCB Design

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Why this is a Good Senior Design Project

• Designing this sensor node
• Embedded Systems/IDEs
• Wireless Communications
• Analog Circuit Design
• Systems Integrations
• High Voltages and Current
• Power considerations
• Solar Panels and Wind Turbines

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Project Manager Responsibilities

• Team Member Vinh Diep
• Communicate project progress with our Freescale
  sponsor and our instructor
• Analog to Digital Conversion and processing
• Integration of analog circuit design with MCU

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Roles and Responsibilities

• Team Member Matthew Bringhurst
• Designing and testing analog circuit design
• Simulations on SPICE
• Component Selection
• Prototyping the analog circuit design

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Major Milestones

• Test Plan 02/15/2016
• Characterization Report 04/04/2016
• Final Design Review 04/11/2016
• Final Report 04/25/2016
• Senior Design Day Presentation 05/03/2016

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Project Deliverables

• Voltage sensing node capable of capturing up to
  300 Vpeak AC and 300 V DC.
• Current sensing node capable of capturing up to
  50 Apeak AC and 50 A DC.
• AC Voltage and Current output in True RMS.

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Constraints

• Minimize cost
• Low power consumption
• Battery Powered
• Inputs to microprocessor ADC require
  conditioning
• 1 available differential ADC channel on MKW24

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Standards

• UL 1569 - Standard for Metal-Clad Cables
• UL 61010-031 - Safety Requirements for
  Electrical Equipment for Measurement, Control and
  Laboratory Use

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Roles and Responsibilities

• Team Member Francisco Saavedra
• Establish communication between MCU and
  Proximetry
• Solar Panel and Wind Turbine Test
• Test cases and error handling

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Challenges Concerns

• Safety
• High voltage/Current Appropriate precautions to
  prevent excess voltage and current
• Predicting performance in environmental
  conditions
• Rain, temperature, wind, pressures, etc.
• 3 phase on Wind Turbine

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Project Progress

• Research completed
• Methods for Voltage and Current sensor design
• Simulations Completed for
• Preliminary analog circuit designs
• Parts procured
• Solar Panels, Wind Turbines
• KW24 Tower Boards, IAR Workbench
• Components ( Shunt resistors, resistors,
  capacitors, Voltage regulators , batteries,
  battery clips, operational amplifiers), cables

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2nd Semester Tasks

• Tasks Planned for the Completion of the project
• Build analog circuit and test
• Design firmware for the device
• Integrate analog circuit with microcontroller
• Set up communication between MCU and Proximetry
• Test device and error handling

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Questions?
Q A