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Thermal HMD

Thermal HMD. Submitted by: Kurt Powell Brandon Yusinski Ryan Hammond. Protection for Firefighters. What is Thermal HMD.

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Thermal HMD

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  1. Thermal HMD Submitted by: Kurt Powell Brandon Yusinski Ryan Hammond Protection for Firefighters

  2. What is Thermal HMD • The idea of this project is to design a helmet-mounted device for firefighters to use to determine the temperature of the environment while fighting a structure fire. The device mounts to the helmet inside the visor and provides a visual indicator of the ambient temperature. Knowing this information can prevent damage to life support equipment as a result of excessive heat.

  3. Thermal HMD Project Scope • Problem: High temperatures during a fire can cause damage to the firefighter's SCBA apparatus, potentially causing a failure of the device and injuring the firefighter • Goal: To design a system that monitors the temperature inside a fire and provide real-time feedback to the firefighter to warn them of conditions that could damage their life support systems and cause injury.

  4. SMART Objectives • Specific: We will be building a prototype system that mounts to a firefighter’s helmet to warn the user of potentially dangerous heat in the surrounding environment. • Measurable: The system will measure the ambient temperature at several points around the user’s helmet, and use the data to determine the danger due to heat. • Assignable: All members are contributing to the design and development stages of the project. Once the design and construction stage begins, each group member will be responsible for a specific task: Temperature Sensing system: Ryan Microcontroller: Brandon Display system: Kurt

  5. SMART Objectives (cont.) • Realistic: In the interest of cost, the original plan to use a Head-Up Display system will be substituted for another visual display and warning system, for test purposes an LED indicator will be sufficient. • Time-based: A prototype system will be build and tested by May 2012.

  6. Block Diagram

  7. Initial Specifications • Powered from a 9 volt battery or rechargeable battery pack • Must last at least 1 hour per charge • Must weigh less than 0.5 pounds • Control unit must not be larger than 3”x2”x2” • Unit must withstand 600 degree Fahrenheit temperatures • Unit must monitor environment conditions in real time, with instantaneous feedback to the display • Unit must have auditory and visual warnings for dangerous temperature(over 350°F) • Must have a low-battery indicator or estimated remaining runtime • Unit will be expandable to include additional sensors and hardware

  8. Background Research • Associated Patents -2045907 – Breathing Appratus: Device that allows the wearer to breathe while submerged in irrespirable fluids -3603667 – Head-Up Display: Device that displays information by superimposing it over the user’s field of view -Us6016099 – Locator Beacon: Device that monitors location of user and alerts coworkers when user is in distress

  9. Work Breakdown Structure Temperature Sensing Subsystem • System will employ multiple sensors in order to ensure an accurate measurement of the surrounding temperature. - Will be accomplished by testing sensors in a controlled environment, individually, then at once. - Time: Approximately 3 weeks. - Member responsible: Yusinski

  10. Work Breakdown Structure (cont.) Microcontroller Subsystem • A microcontroller will be used to receive the inputs from the various sensors, and use them to determine the temperature to be displayed within the helmet, as well as sense battery voltage to warn the wearer of a potential low-power condition - Will be accomplished by obtaining and programming all necessary inputs, outputs, and warning indicators - Time: Approximately 3 weeks - Member Responsible: Hammond

  11. Work Breakdown Structure (cont.) Display Subsystem • The display for the project will include an LED indicator for the temperature and low battery, as well as audible warnings when the system detects a dangerous heat situation and when battery power is deemed dangerously low by the system. - Will be completed when the display outputs visual and auditory warnings when the system detects high heat and low battery - Time: Approximately 3 weeks - Member responsible: Powell

  12. Work Breakdown Structure (cont.) Construction and Testing • The construction and testing of all systems together will be performed once all of the various subsystems have been developed and tested to ensure reliable operation of the system. - Will be completed when the systems are integrated into one complete package, and functioning appropriately - Time: Approximately 2 weeks - All team members will collaborate during the construction and testing phase of the process

  13. Microcontroller Components The following components are being researched for use in the microcontroller subsystem: • Parallax Professional Development Board:28138 • Parallax BASIC Stamp 2p microcontroller: BS2P40

  14. Inputs and Outputs The following temperature sensors have been selected for use in the temperature sensing subsystem because of their ability to detect high temperatures, up to 260°C. The system will be designed to incorporate up to 4 sensors, but for the sake of cost, will be developed using one. • Honeywell HEL-705-U-1-12-00 The system will utilize LEDs for low battery and high temperature warnings, as well as a Piezo speaker programmed for the appropriate warnings.

  15. Gantt Chart

  16. Responsibility Matrix

  17. Risk Matrix

  18. Risk Matrix (cont.)

  19. Test and Verification Temperature Sensor Sub-system: ● Design temperature sensing system and implement on helmet ● Can the sensors give readings within 25 degrees of the actual temperature up to 500 degrees Fahrenheit? ● Can related hardware and wiring to sensors survive the extreme heat and moisture?

  20. Test and Verification (cont.) Microcontroller: Program Controller to accomplish the following tasks • Combine data from all temperature sensors to provide a single reading to display ● Is the data given by the controller consistent with the actual temperature of the environment? ● Is every sensor’s reading accounted for in the programming? ● Is erroneous data or outliers(readings exceeding 100°F of actual) removed from the data provided to the display? • Provide on/off indicator to display and low battery warning ● Does the controller provide a signal to the display when power is applied to the controller? ● Does the controller provide a signal to the visual indicator when battery power drops below 25%? ● Provide warning when the temperature approaches the threshold of the helmet ● At temperatures above 350 degrees Fahrenheit, does the controller provide an output signal to the visual indicator?

  21. Test and Verification (cont.) Display Sub-system ● Design and implement the helmet display ● Can the display survive some degree of impact or wear, high temperature, and moisture? ● Does the display receive and indicate an accurate temperature reading(within 25°F)? ● At low battery power, does the display provide a visual warning? ● When the system is turned on, does the user receive a visual indication?

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