MECH206P Design & Professional Skills Control
MECH206P Design & Professional Skills Control Scenario Alarm System User Manual
Group 15 Karan Pinto (13055036) Einar Jonsson (14006267) Mohamad Karami (14043818) Tanguy Matta (14026006) Nelly Denisova (14049278) Martin Legrand (13034243) Kate Hunter (14015096) Haizhen Wu ( 13006404 ) Emmanouela Rokofyllou (14039779) Summary
A small scale prototype of an equivalent full size alarm system that alerts security if Brunel’s coffee mug is touched, moved or taken when displayed openly on a plinth. The alarm system does not make contact with the artefact and utilises three Arduino sensors. The system senses if anything gets within close proximity of the mug, if the mug is touched or removed. The mug is not enclosed and its view is unobstructed.
Alarm System Drawing
pink - piezo sensor orange - light sensor green - tilt sensor
Alarm System Components Light Dependent Resistor A variable resistor that changes in resistance based on the amount of light that falls on its face.
Figure 1: Photo resistor sensor specifications Piezometer
Figure 2: Piezometer specifications Tilt Sensor A switch that will open/close based on its orientation.
Figure 3: Tilt sensor specifications
LEDs Red A diode that acts as an indicator and illuminates when electricity is passed through it.
Figure 4: Red LED specifications LCD An alphanumeric/ graphic display based on liquid crystals.
Figure 5: LCD specifications
Push Button A momentary switch that closes the circuit when pressed.
Figure 6: Push button specifications
Arduino Uno Board The microcontroller development board, a simple computer on which we have built circuits and interfaces for interaction with the alarm system.
Figure 7: The labelled Arduino Uno board
Reference Note: The images in the Figures 1 to 7 are sourced from the Arduino Site. Electrical Circuit Schematic Symbols:
Figure 6: Schematic Symbols Guide
Electrical Circuit Connections Schematics https://cdn.fbsbx.com/hphotos-xfl1/v/t59.2708-21/12013646_102066982847 29663_1782288552_n.pdf/Schematic1-final.pdf?oh=7e7b38adb1887de63b6f2 920c7dfabfc&oe=563E7DB4&dl=1
Electronic Circuit Highlights Capacitors reduce fluctuations of voltage, turning analog signals to digital signals. A capacitor is used in combination with the light sensor under the mug. Resistors reduce the current so components don’t get burnt by a high currents passing through them. A resistor is used in combination with the five light sensors surrounding the mug.
Description Alarm System Set Up The entire alarm system consisting of a base platform with four springs supporting a plate will be placed on a plinth . The plate has a shallow counterbore hole in which the artefact is placed to prevent it from falling. The purpose of the springs is to make the piezo and tilt sensors respond to minute vibrations by amplifying its sensitivity. Threat detection ❖ If the mug were to be touched, the spring mounted plate will wobble and oscillate, triggering the piezometer or tilt sensor, setting off the alarm. ❖ If the mug were to be taken or moved the light sensors equidistant from the mug would recognise the intrusion. ❖ The five external light sensors are calibrated such that, if the light intensity they are subjected to imitates something reaching towards the mug, the alarm will be set off. For these sensors, only dark shadows with a low light intensity will trigger the alarm. ❖ If the mug is lifted from the plate, the sixth light sensor which is underneath the mug will set off the alarm. For this sensor, only a high light intensity will trigger the alarm. When the alarm goes off an LED light will flash and the LCD screen will display a threat message. The LCD shows a custom message indicating which type of sensor was breached.The LED and the LCD will be located in a secure room, UCL staff can manually turn the alarm on/off by using a push button. Startup ● Install arduino software onto your PC. ● Open the application and copy across the template alarm system code provided. ● Plug the device into the USB port of your computer ● Compile the code and upload it onto the arduino micro controller. (The code consists of two main functions, the setup and the loop.) ● Push the on button to activate the alarm system. Now the device is ready to be used.
Reset Pressing the reset button on the arduino uno chip: ● Restarts the alarm system. ● Re-runs the code. Shutdown ● Push the off button. ● Unplug from the USB/mains electricity.
Group 15 Karan Pinto (13055036) Einar Jonsson (14006267) Mohamad Karami (14043818) Tanguy Matta (14026006) Nelly Denisova (14049278) Martin Legrand (13034243) Kate Hunter (14015096) Haizhen Wu ( 13006404 ) Emmanouela Rokofyllou (14039779) Summary
A small scale prototype of an equivalent full size alarm system that alerts security if Brunel’s coffee mug is touched, moved or taken when displayed openly on a plinth. The alarm system does not make contact with the artefact and utilises three Arduino sensors. The system senses if anything gets within close proximity of the mug, if the mug is touched or removed. The mug is not enclosed and its view is unobstructed.
Alarm System Drawing
pink - piezo sensor orange - light sensor green - tilt sensor
Alarm System Components Light Dependent Resistor A variable resistor that changes in resistance based on the amount of light that falls on its face.
Figure 1: Photo resistor sensor specifications Piezometer
Figure 2: Piezometer specifications Tilt Sensor A switch that will open/close based on its orientation.
Figure 3: Tilt sensor specifications
LEDs Red A diode that acts as an indicator and illuminates when electricity is passed through it.
Figure 4: Red LED specifications LCD An alphanumeric/ graphic display based on liquid crystals.
Figure 5: LCD specifications
Push Button A momentary switch that closes the circuit when pressed.
Figure 6: Push button specifications
Arduino Uno Board The microcontroller development board, a simple computer on which we have built circuits and interfaces for interaction with the alarm system.
Figure 7: The labelled Arduino Uno board
Reference Note: The images in the Figures 1 to 7 are sourced from the Arduino Site. Electrical Circuit Schematic Symbols:
Figure 6: Schematic Symbols Guide
Electrical Circuit Connections Schematics https://cdn.fbsbx.com/hphotos-xfl1/v/t59.2708-21/12013646_102066982847 29663_1782288552_n.pdf/Schematic1-final.pdf?oh=7e7b38adb1887de63b6f2 920c7dfabfc&oe=563E7DB4&dl=1
Electronic Circuit Highlights Capacitors reduce fluctuations of voltage, turning analog signals to digital signals. A capacitor is used in combination with the light sensor under the mug. Resistors reduce the current so components don’t get burnt by a high currents passing through them. A resistor is used in combination with the five light sensors surrounding the mug.
Description Alarm System Set Up The entire alarm system consisting of a base platform with four springs supporting a plate will be placed on a plinth . The plate has a shallow counterbore hole in which the artefact is placed to prevent it from falling. The purpose of the springs is to make the piezo and tilt sensors respond to minute vibrations by amplifying its sensitivity. Threat detection ❖ If the mug were to be touched, the spring mounted plate will wobble and oscillate, triggering the piezometer or tilt sensor, setting off the alarm. ❖ If the mug were to be taken or moved the light sensors equidistant from the mug would recognise the intrusion. ❖ The five external light sensors are calibrated such that, if the light intensity they are subjected to imitates something reaching towards the mug, the alarm will be set off. For these sensors, only dark shadows with a low light intensity will trigger the alarm. ❖ If the mug is lifted from the plate, the sixth light sensor which is underneath the mug will set off the alarm. For this sensor, only a high light intensity will trigger the alarm. When the alarm goes off an LED light will flash and the LCD screen will display a threat message. The LCD shows a custom message indicating which type of sensor was breached.The LED and the LCD will be located in a secure room, UCL staff can manually turn the alarm on/off by using a push button. Startup ● Install arduino software onto your PC. ● Open the application and copy across the template alarm system code provided. ● Plug the device into the USB port of your computer ● Compile the code and upload it onto the arduino micro controller. (The code consists of two main functions, the setup and the loop.) ● Push the on button to activate the alarm system. Now the device is ready to be used.
Reset Pressing the reset button on the arduino uno chip: ● Restarts the alarm system. ● Re-runs the code. Shutdown ● Push the off button. ● Unplug from the USB/mains electricity.
