Remote Emergency Notification System (RENS) Group 5 Nazmul Alam Saul Harari Todd King

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Allan O’Neal’
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1 Remote Emergency Notification System (RENS) Group 5 Nazmul Alam Saul Harari Todd King

2 Overview Introduction Objective Sensor Transmitter/Receiver Code Components/Cost & Load Analysis Improvements & Upgrades Acknowledgements 2

3 Objective To design and build a system that demonstrates the ability to remotely detect trace gas levels and transmit this detection to a receiver unit utilizing a Basic Stamp, and digital and analog sensors, and actuators. 3

4 Sensor Types of Gas Sensors IR absorption. Metal Oxides. Tin oxide/ Titanium oxide. Catalytic Combustible. Heated catalytic bead. Etc 4

5 Trace Hydrogen Sensor Manufactured by Nanomaterials LLC High sensitivity to low concentrations of hydrogen(0-000ppm) 000ppm) Fast response (~5 sec) Operating range degrees Celsius 0-90% RH (non-condensing) Low dependency on flow rate 5

6 Trace Hydrogen Sensor cont. Operates on a VDC power supply Heater element operates at ~240 degrees Celsius Sensor output 0-5VDC 0 continuous Sensor zero and gain are user adjustable 6

7 Future Semiconductor Sensor Current sensor limitations Technology Require large operating voltages High resistance in the electrodes Require elevated sensor temperatures Current Research/Developments Sensor can operate at room temperature Operating voltage range -0mV 0mV Improved sensitivity ppm Reversible chemical processes The Final Step Increased selectivity Lower concentration levels 7

8 Transmitter/Receiver-Main Components Transmitter Circuit Board Receiver Circuit Board Receiver Module Circuit Board 8

9 Transmitter/Receiver Specifications UHF (433.9Mhz), license-free (LIPD band) operation Range ~ 00 m Aligned transmitter and receiver modules Rolling-code ( code hopping ) operation (7.3 x 0 9 codes) Receiver learns transmitter code Receiver can handle up to 5 transmitters 4 channels available, each either momentary (push on, release off) or latching (push on, push off) via jumpers Each channel relay contacts rated at 28VDC/2A (single pole changeover) 2VDC operation, we are using 5VDC on transmitter and 9VDC on receiver. 9

10 Receiver Module 0

11 Receiver Circuit Diagram

12 Receiver Output Schematic 2

13 Microcontroller Interface 3

14 PBasic Code: Level Transmission 4

15 PBasic Code: DAQ and Level Check 5

16 PBasic Code: ROM Storage 6

17 PBasic Code: Data Retrieval 7

18 Components and Cost Analysis BOE Trace Hydrogen Eval. Kit Tx/Rx kit Mounting hardware Project box 7x5x3 Project box 6x4x2 2. mm power jack 3.6Khz Piezo Speaker DPDT 6A Toggle switch 2. mm coax plug Heat shrink tubing packet Pack 0 small wire clips PC board 7805 Voltage Regulator 9 Pin female DSUB connector 9 Pin male DSUB plug Pk5 LED snap-holders 0 mfd 35VDC capacitor. mfd disc capacitor 00 mfd 35 VDC capacitor Total Component Quantity numerous Cost $00.00 $ $ $ 7.95 $ 5.99 $ 4.99 $ 4.98 $ 3.99 $ 3.99 $ 2.49 $ 2.29 $.99 $.69 $.49 $.49 $.49 $.9 $ 0.99 $ 0.99 $ 0.99 $

19 Load Analysis Module Voltage Current Tx-on /Current Tx-off Power Tx-on /Power Tx-off Transmitter 5VDC.0mA/0mA 5.5mW/0mW Receiver 9VDC 6.7mA/7.mA 555.3mW/63.9mW LED/Piezo 9VDC 2.5mA/0mA 2.5mW/0mW Sensor 2VDC 36mA.632W BS2 9VDC 28.6mA/28.6mA 257.4mW/257.4mW 9

20 Improvements and Modifications Sensor system can be modified with an array of sensors to detect multiple agents. Communication modules can be changed to suit geographical conditions. E.g. AM/FM, Ethernet, Modem, Hardwired comm systems. Future designs would incorporate integrated technologies to enable smaller module packages. E.g. Replacement of BOE and Basic Stamp, Tx/Rx IC modules, larger ROM storage for data logging. Alternative forms of power supplies can be utilized to power the various modules. E.g. Solar cells, hardwired power supplies. 20

21 Acknowledgements Professor Vikram Kapila Department of Mechanical Engineering, Polytechnic University Clayton J. Kostelecky Nanomaterials Research LLC Professor Kalle Levon Department Head and Director, Polymer Research Institute, Polytechnic University Nathan Lee Graduate Assistant, Department of Mechanical Engineering, Polytechnic University 2

Datasheet: K-22 LO Sensor

Datasheet: K-22 LO Sensor The K- 22 LO is a CO2 sensor module designed to be built- in into stationary ventilation equipment, such as window vent or duct exhaust actuators, serving as a linear transmitter