1. Final Presentation Glass Break Detection Team 11-16-10

2. Team Members Dennis Narcisse Pic 24 Programming Synapse Programming Matthew Marsh Signal Processing Hardware Implementation Christian East Opamp Configuration Signal Processing Mark Lynn Hardware Implementation Technical Documentation

3. Advisor Dr. Raymond Winton Advisor MOS Devices, RFIC, and ASIC

4.  Introduction  Problem Statement  Solution  Constraints  Technical  Practical  Prototype Design  Subsystem Testing  System Testing  Senior Design II Goals Overview

5.  Glass Break Detection System (GBDS) is an alarm system that detects the frequency of breaking glass  Consist of a central unit and multiple detection units  System communicates wirelessly among all units Introduction

6.  Current glass break alarms operate:  as stand alone units  hardwired to a central unit  High cost for complicated designs Problem

7.  Use low power wireless technology  Central unit communicates to all detection units  Simplified design to lower overall cost Solution

8. NameDescription RangeThe detection unit must detect glass breaking up to 25 feet. AccuracyThe detection unit must detect the noise frequency emitted by the breaking of glass to prevent false alarms from normal household sounds. Supply VoltageThe detection units must be battery powered. The central unit must be wall powered. Transmission DistanceCentral and detection units must be able to wirelessly communicate within a 33 to 246-ft range. DisplayThe central unit must have a display screen that is easily read. Technical Constraints

9. Practical Constraints

10.  Manufacturability  The GBDS must be simple in its design Practical Constraints

11. Prototyping Design

12. Central Unit

13. Detection Unit

14. Sensing Block

15.  Synapse  Transmission Distance  Sensing Block  Non-Inverting Gain Amplifier  Low Pass Filter  High Passer  Microphone  Power Supply Subsystem Testing

16.  Transmission Distance  We tested our transmission distance outside Simrall to Patterson which is around well above our technical constraints Synapse Distance

17. Distance (yds)ConnectivityExpected Connectivity 197 %99.9086 % 1060 %99.086 3541 %96.801 6042 %94.516 8535 %92.231 11014 %89.946 13525 %87.661 16023 %85.376 18512 %83.091 2057 %81.263

18. Non-Inverting Gain Amplifier

19.  Non-Inverting Gain Amplifier Sensing Block

20. Low Pass Filter

21.  Low pass filter at 2kHz Sensing Block

22.  Low Pass Filter at 350 Hz Sensing Block

23. High Pass Filter

24.  High Pass Filter at 5kHz Sensing Block

25.  High Pass Filter at 15.5 kHz Sensing Block

26. Attenuation Tables InputOutput Gain Amplifier280 mV3.361 2 kHz350 Hz Low Pass Filter2.16 V3.52 V 5 kHz15.5 kHz High Pass Filter680 mV1.161 V

27.  As we will show later in system testing our microphone has a range of 25 feet  This meets our range constraint Microphone

28.  We simulated glass break from various distances and implemented various thresholds to see which ADC values were most efficient at a certain range Microphone Testing Range (ft)Thud Level (ADC) Glass Level (ADC) 1065014 1561010 255805

29. Power Supply  The central unit is wall powered by 120 Vac and stepped down to 3.3 V at the rails  The detection unit is battery powered with 3.3 V at the rails 120 VAC6 VDC3.3 Vrail Central Unit111.736.113.31 Detection UnitNA 3.31

30. System Testing

31. ConstraintsSuccessful RangeYes AccuracyYes Power SupplyYes Transmission DistanceYes DisplayYes Fulfilled Design Constraints

32.  PCB design  Packaging  wall mounted central unit  detection unit Senior Design II Goals

33. References

34. Questions