Wireless Sensing System for Intelligent Concrete Curing Design Team - - PowerPoint PPT Presentation

Wireless Sensing System for Intelligent Concrete Curing

Design Team Two – Spring 2012 Chai Yong Lim Kevin Gladstone Jonathan Sangregario Yanqing Li

Sponsor

Pete Semig

TI Precision Analog Facilitator

• Dr. Jian Ren

Agenda

• Project Purpose
• Design Specifications
• Final Design
• Prototype Demonstration
• Results and Future Work

Why Sense Concrete Curing?

• Eliminate the need to

estimate the status of curing concrete

• Improve the properties of

cured concrete

• Prevent safety hazards
• Save time and money

Purpose Specifications Final Design Demonstration Future Work

TI’s MAVRK

• Modular and Versatile

Reference Kit (MAVRK)

• Modular hardware

prototyping platform

• The design features the

µMAVRK RF transceiver module

• Sensor system provides a

demonstration of µMAVRK capabilities and usage

Purpose Specifications Final Design Demonstration Future Work

Design Specifications

• Track moisture and temperature data over time
• Provide accurate data readings
• Low power consumption
• Robust enclosure
• Small size
• Data displayed by easy-to-use GUI
• Functional demonstration prototype

Purpose Specifications Final Design Demonstration Future Work

System Design Overview

Purpose Specifications Final Design Demonstration Future Work

Sensor Selection

Temperature Sensor

• Resistive temperature

detector

• Small size
• Accurate
• Linear
• Implemented in

Wheatstone bridge

Purpose Specifications Final Design Demonstration Future Work

Moisture Sensor

• Vegetronix VH400 soil

moisture sensor

• Reports volumetric water

content

• Replaced VG400
• Drawbacks
• Large size
• High power consumption

Analog Sensor Module

• Receives sensor input
• Signal conditioning
• Output to µMAVRK

Purpose Specifications Final Design Demonstration Future Work

µMAVRK RF Transceiver

Purpose Specifications Final Design Demonstration Future Work

WDT ¡ Interrupt S0 ¡ Ini%aliza%on S1 ¡ Sleep ¡& ¡ Wait ¡for ¡ Event S2 ¡ Enable ¡sensor ¡ board ¡chips ¡& ¡ Start ¡Analog-­‑ Digital ¡ Conversion ¡ S3 ¡ Disable ¡sensor ¡ board ¡chips ¡& ¡ Transmit ¡ADC ¡ values ¡ Transmi(er ¡State ¡ Machine Conversion ¡Complete ¡ Interrupt S0 ¡ Ini%aliza%on S1 ¡ Sleep ¡& ¡ Wait ¡for ¡ Event S2 ¡ Reformat ¡the ¡ Packet ¡ Forward ¡the ¡ packet ¡to ¡UART ¡ byte ¡by ¡byte Receiver ¡State ¡ Machine RF ¡Received ¡ Interrupt & ¡CRC ¡Check ¡OK

GUI Design

Purpose Specifications Final Design Demonstration Future Work

Enclosure

• Robust and reusable
• Modified Witz sport case
• Sensors exposed to

environment

Purpose Specifications Final Design Demonstration Future Work

Demonstration

Purpose Specifications Final Design Demonstration Future Work

• Verification of prototype

functionality

http://www.egr.msu.edu/classes/ece480/capstone/spring12/group02/Site/Media.html

Results

Successfully Met Specifications

• Data trends tracked over time
• Robust enclosure
• Successful software

implementation including simple GUI

• µMAVRK creatively

implemented for wireless communication

Purpose Specifications Final Design Demonstration Future Work

Partially Met or Unmet Specifications

• Some system and sensor-

based accuracy errors

• Large power consumption

Future Improvements

• New moisture sensor
• Size reduction
• Power consumption reduction
• Combine receiver and GUI software into a USB plug-and-play device
• Develop curing algorithms

Purpose Specifications Final Design Demonstration Future Work

Thank You

Questions?