Class II Division 2 Occupancy Sensor Class II Division 2 Occupancy - - PowerPoint PPT Presentation

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Class II Division 2 Occupancy Sensor Class II Division 2 Occupancy Sensor Presented on November 28, 2012 by: Presented on November 28, 2012 by: James Fisher James Fisher Michael Gazda Michael Gazda Michael Gazda Michael Gazda Russell Gee

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Class II Division 2 Occupancy Sensor Class II Division 2 Occupancy Sensor

James Fisher James Fisher Michael Gazda Michael Gazda

Presented on November 28, 2012 by: Presented on November 28, 2012 by:

Michael Gazda Michael Gazda Russell Gee Russell Gee JoAnne Hitchcock JoAnne Hitchcock Gledi Progonati Gledi Progonati Christopher Zannoni Christopher Zannoni

  • Dr. Sung Yeul Park (ECE) Dr. George Lykotrafitis (ME)
  • Dr. Sung Yeul Park (ECE) Dr. George Lykotrafitis (ME)

Senior Design 2012 Senior Design 2012-

  • 2013

2013

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SLIDE 2

Agenda Agenda

Background Initial Design Approaches Meeting Outcomes

FM Approvals

Sensor Switch

Sensor Switch

Final Design Approaches Plan for next semester

Testing of design Gantt chart and team member roles

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SLIDE 3
  • What are occupancy sensors?

Why?

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SLIDE 4
  • Relay and

Power Supply for Sensor

Sensor Line Voltage Sensor Power (Low Voltage<200 mW) Control Signal

for Sensor

Sensor Control Signal Manual Switch

ECE Senior Design 2012 ECE Senior Design 2012-

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SLIDE 5
  • ○ !"!

"

○ #$ ○ #$

%!"

  • ECE Senior Design 2012

ECE Senior Design 2012-

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SLIDE 6
  • ECE Senior Design 2012

ECE Senior Design 2012-

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SLIDE 7
  • Relay and

Power Supply for Sensor

Control Line Voltage Power to Luminary

Dust'Tight Conduit

Sensor

Dust'Tight Enclosure Window made out of IR transmissible material

Sensor Power Control Signal

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SLIDE 8
  • ECE Senior Design 2012

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SLIDE 9

!"

  • ECE Senior Design 2012

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#$%

Our research led to many unanswered

questions about requirements

What are the testing methods? Which, of the many, requirements are relevant to

  • ur project?
  • ur project?

What are the component and design restrictions?

We contacted a NRTL

FM Approvals offered to help

○ Answered many questions ○ Provided expert opinions ○ Helped finalize our approach

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SLIDE 11

& '

OSHA approved testing/certification

company

Parent company: FM Global In business since 1835

Make the regulations that drive industry

Make the regulations that drive industry

standards

Acts as disinterested, 3rd party observer

where design process is concerned

Qualified to test for IS (intrinsic safety), dust'

ignition proof, explosion'proof, etc.

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SLIDE 12

& '

Explained the testing process:

Duration Approach Various tests depending on desired Various tests depending on desired

certification:

○ Crush, exclusion (purge/pressurize),

flammability, rigidity, torque, mould stress, hot and cold impact, intrinsic safety

○ Will be explained later in presentation

General requirements to pass tests

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SLIDE 13

& '

We explained the initial designs

Received feedback

○ What would/wouldn’t pass testing ○ Discussed possible solutions and provided

specs. specs.

Enclose the sensor using dust ignition proof standard Or make sensor intrinsically safe using provided

standard

Changes needed from initial product to

completed, passable design

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SLIDE 14

Gave us two options

Enclose the sensor

○ Find a 1mm thick Fresnel lens for PIR sensor

window

Make sensor intrinsically safe

○ Professor Park advised us to do this option

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SLIDE 15

(

Brainstorm Evaluate Advisement

Sensor Switch Meeting Sensor Switch Meeting FM Approvals Meeting Advisor’s Recommendation

Finalize Create

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SLIDE 16

&'

Dust'ignition proof box enclosing relay according to the FM3616 standard

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Intrinsically safe sensor according to FM3610 which refers you to ANSI/ISA60079'0 and ANSI/ISA60079'11 standards

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SLIDE 17
  • We will build an

apparatus to determine whether the enclosure is dust tight. is dust tight.

Create vacuum within

enclosure

Circulate talcum powder

within chamber

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SLIDE 18
  • 2.7 J impact test for Class II

1kg test mass, falling from height

270mm

Steel hemisphere 25mm diameter as Steel hemisphere 25mm diameter as

impact point

Unit assembled, mounted on concrete

with mass over 20kg

(Drop test not necessary' not portable)

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SLIDE 19

)

Non'metallic elements which dust'

protection is dependent must undergo thermal endurance testing

Heat: 4 weeks at (90±5)% humidity, Heat: 4 weeks at (90±5)% humidity,

(20±2)K above maximum service temperature

Cold: 24hr, 5 to 10K below minimum

service temperature

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SLIDE 20
  • Determine how circuit works

Recently acquired blueprints Work with Sensor Switch engineers

Analyze components for IS Analyze components for IS Redesign PSpice analysis PCB Design and Prototype Practical tests

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*(

  • Initial Hazardous

Environment Research'found required specs

  • Meeting with Sponsor (9/19)
  • Requested Blueprints
  • Website Design
  • Project Statement
  • Projects specifications
  • Website finished
  • NEC research 1500p doc
  • 21
  • NEC research 1500p doc
  • Found 12 specs relating to

project

  • Contacted FM Approvals
  • Enclosure design
  • Project specs redefined
  • Setup meeting with FM

approvals

  • Wireless and Wired research
  • Final Written Proposal
  • FM Approvals meeting
  • Project redefined
  • Sensor Switch meeting
  • Project Redefined
  • Test equipment researched
  • Blueprints received
  • Final Presentation
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*&

December January Febuary March April Wk 1 Wk 2 Wk 3 Wk 4 Wk 1 Wk 2 Wk 3 Wk 4 Wk 1 Wk 2 Wk 3 Wk 4 Wk 1 Wk 2 Wk 3 Wk 4 Wk 1 Wk 2 Wk 3 Wk 4 Figure out circuit w/SS Winter Break Initial Enclosure Design Finalize Enclosure design

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Build Test Equipment Analyze components for IS Redesign Circuit Prototype Circuit PCB design Test Circuit Test Enclosure

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SLIDE 23

+,

Russell

Design and Build Test Equipment

Gledi

PCB Design and Help with Test Equipment

JoAnne JoAnne

Circuit Design and Circuit Testing

Mike & James

Designing, Prototyping, Testing of Relay

Enclosure

Chris

Team Management and Circuit Testing

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SLIDE 24
  • Complexity of regulations hindered

design progress.

$13,000 Cost of Project

design progress.

Impractical to make a detailed budget in

12 hours.

However most money spent will go

towards testing equipment.

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Questions? Questions? Questions? Questions?

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2013