By Artie Duncanson, on 13 Feb 2013 08:16
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The guard monitor was constructed as a means of making sure that the security guards do not sleep during their shift. At random intervals of 10-50 minutes the alarm will sound, and the guard must push a button to turn it off, thus confirming that he is awake and at his post.
The alarm housing will be placed within the guard desk, holding the device inside it. The monitor is powered by Power Over Ethernet (POE) inserted into the Arduino Ethernet board. Attached to the Ethernet board is a 65 mm blue LCD screen that will display the amount of time the device has been running for and either confirms or states a failure to push the button that determines if the guard is awake or not. Also joined to the Ethernet board is a 28 mm speaker that emits an alarm at 523 Hz at intervals of 0.50 seconds for the first 30 seconds, then at intervals of 0.25 seconds for the next 30 seconds, and finish with a loud screech for the final 5 seconds. At any point the alarm can be turned off with the push of a button.
The guards will not have to listen to the alarm in the first place if they push the button during the visual cue of a red LED that blinks for 15 seconds prior to the audio cue. A yellow standby LED will remain glowing to show that the program is on and running.
The guard monitors can connect to a web server that logs the activity of the guard monitor and stores it on a webpage developed for storing this data. The recorded activity includes when the device was powered on, if the guard pressed the button prior to the end of the alarm, or if the alarm elapsed without the guard confirming he was on duty by pushing the button. Should a guard fail to push the button before the alarm ends, an email will be notified to a superior notifying that individual that the guard did not confirm his presence at his post.
Project Status
6/21/13:
Guard Monitor 1 (located in the main lobby) is installed and powered with a POE switch. This monitor now has the capability of providing status updates to a data log on a web server as well as send email warnings when the alarm button is not pushed within the 80 seconds that the alarm begins ringing.
Guard Monitor 2 (located in the booth in front of The White House) will be updated with the Ethernet capabilities of Guard Monitor 1 as soon as an internet connection is provided to the booth.
Components
| Qty | Description |
|---|---|
| 1 | Arduino Ethernet |
| 1 | Push Button |
| 1 | I2C LCD Display |
| 1 | Red LED |
| 1 | Yellow LED |
| 1 | Buzzer |
| 1 | Housing Case |
| 1 | RJ-45 Socket |
Assembly
Guard Alarm Faceplate Cuts
The acrylic faceplate was cut in the above dimensions
Guard Alarm Housing
The Housing Case. Both sides of housing case and the buzzer are lined with aluminum foil. This became necessary because the guard walkie-talkies have been emitting RF signals that jam the electronics within the guard monitors. One side of the foil is taped over with electrical tape to prevent unwanted electrical connections.
Two dimensions of the housing case are given above. The depth of the box is 50mm.
Schematic
Process Flow
Guard Monitor Process Flow without SD Back up.
Guard Monitor Process Flow with SD Back up.
This occurs when internet connection is not available: the device will store the data (up time and event) in the SD card.
Once internet connection is back, it will send all stored data to the web server.
Change History
| Date | Description |
|---|---|
| 06/21/2013 | v2.0 installed |
| 05/13/2013 | Replaced buttons with a more reliable package |
| 03/15/2013 | Lined Guard Monitors with aluminum foil |
| 03/04/2013 | v1.4: Changed to UNO board with watchdog timer |
| 02/21/2013 | v1.3: Added watchdog timer |
| 02/18/2013 | v1.2: Removed push button interrupt |
Source Code
| Name | Modified | Author |
|---|---|---|
| Guard Alarm v2.0-rc | 06/21/2013 | Kendro |
| Guard Alarm v1.4-stable | 03/04/2013 | Kendro |
| Guard Alarm v1.3-rc | 02/21/2013 | Kendro |
| Guard Alarm v1.2-rc | 02/18/2013 | Kendro |
| Guard Alarm v1.1-rc | 02/18/2013 | Kendro |
| (name files with proper versioning and note stable/unstable release) |
| File name | File type | Size | |
|---|---|---|---|
| Alum_Foil_Protection2.JPG | JPEG image data | 69.44 kB | Info |
| Button_Idea.png | PNG image data | 3.3 kB | Info |
| Finished (FrontView).JPG | JPEG image data | 107.07 kB | Info |
| Finished (SideView).JPG | JPEG image data | 101.14 kB | Info |
| GuardAlarm_01.1-RC.zip | Zip archive data | 1.13 MB | Info |
| GuardAlarm_01.2-RC.zip | Zip archive data | 1.13 MB | Info |
| GuardAlarm_01.3-RC.zip | Zip archive data | 41.77 kB | Info |
| GuardAlarm_01.4Stable.zip | Zip archive data | 41.1 kB | Info |
| GuardAlarm_02.0_RC.zip | Zip archive data | 3.58 kB | Info |
| Guard Alarm Faceplate Cuts.png | PNG image data | 199.29 kB | Info |
| Guard Alarm Housing.png | PNG image data | 179.76 kB | Info |
| Guard Alarm Schematics.jpg | JPEG image data | 117.91 kB | Info |
| GuardAlarm_Sideview.JPG | JPEG image data | 247.39 kB | Info |
| GuardAlarm v2 ProcessFlow.jpg | JPEG image data | 214.46 kB | Info |
| GuardAlarm w: Sync ProcessFlow.jpg | JPEG image data | 301.52 kB | Info |
| Guard_Monitor_2_Schematic.png | PNG image data | 18.37 kB | Info |
