Infrasound in wildfire

Background
 It has recently been found that large wildfires generate infrasonic waves that can be detected by infrasound observatories. Advances in measurement technology has made it possible for measuring devices that are both portables and inexpensive. 

Problem Statement
 Design a deployable self sustaining package that can continuously measure infrasonic wave data at 2K Hz and transmit that data wirelessly. The package must be able to operate for 3 months without relying on existing power infrastructure. 

Deliverables & Specifications
 2-3 months of continuous power Battery powered with possible solar generation Wireless access to measured data within 6 hours Lora to cell tower or Zigby to cell tower Possible chain network to increase range from package to communication infrastructure. GPS time sync stored with data Prototype costs under $1000 <li>Portable package for one person to carry. <li>Error correction on transmitted data <li>Possible command signals from control cente </ul>

Goals
Currently as a group we have pinpointed our design constraints, what we want the system to do and what we believe will be an engineering solution for the project at hand. We have found that the major issue within our project will be power consumption, since we will not be relying on any major infrastructure to power our system we need to be able to run it for a couple of months. We have also found that for the communication we have to piggyback on the cell towers to connect to the internet. This will require setting up a 4G/LTE network for the system. We currently are researching what this will take to communicate. In the near future we are wanting to learn how to pull data from the sensor using only an RP-3B and write/send that data in a readable format. This will involve setting up a daisy chained network, using LoRaWAN or Zigbee, to send the data long distance. Our future goals is to set up and have testing of the communication network with the sensor data collection incorporated. We will continue to try to find solutions to the power issue and how we will power the entire design system. Future plans will look into green energy, DC-DC conversion, AC-DC conversion and restrictions of 4G/LTE network communication.

Ideal pricing for Infrasound Design
 <li>Raspberry Pi 3 Model B = $35.00 (will have more than one) <li>LoRa/GPS Long Range Transceiver HAT 915 Mhz = $32.00 (will need to have 1-N as N RASPI’s) <li>Raspberry Pi 3G-4G/LTE Base Shield V2 = $39.00 <li>Quectel EC25 Mini PCIe 4G/LTE Module = $89.00-$66.00 <li>USB 2.0 to USB 2.0 male cable = $6.05 <li>64 GB micro SD SanDisk Ultra = $20 <li>SunFounder DC-DC converter for Raspberry Pi = $9.00 <li>Best Case Assuming 4 raspberry pi’s = $376.05 <li>Worst Case Assuming 4 raspberry pi’s = $399.05 <li>Best Case Assuming 5 raspberry pi’s = $443.05 <li>Worst Case Assuming 5 raspberry pi’s = $466.05 <li>Texas Instruments PTN78000WAH Power converter = $14 <li>MCP3008 ADC = $4 </ul>

Design


The block diagram shown presents our current plan for data communication from the infrasonic sensor back to the control center.The infrasonic measurement device will stream its differential voltage measurements to the raspberry pi from which the pi will digitize and communicate that data through an attached LoRa module. Additional raspberry pis will be placed in between the measurement device and 4G communication infrastructure to form a connected daisy chain to increase the operational distance of the infrasonic device.The final raspberry pi will communicate the measured data through a local cell tower via a 3G/4G shield module. The upload data will be stored back at the control center.



Team Information
=Documentation Archive=
 * Agendas
 * Data Sheet
 * Meeting Minutes
 * Snap Shot