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--- human_detection_sensor_system [2009/03/04 04:43]
jonmash
+++ human_detection_sensor_system [2009/03/04 05:34] (current)
jonmash
@@ Line 7: / Line 7: @@
 These sensors are comprised of a [[http://www.glolab.com/pirparts/pirparts.html|Pyroelectric Infrared Sensor]] along with a custom designed amplifier circuit. A datasheet for the Pyroelectric Sensor can be found below. Due to the complexity of the amplifier circuit, the team decided to print PCB's for these boards - an attempt to save time and effort.
-The Pyro-Sensors is used to detect the movement of humans (or any heated body) in a defined field of view. These sensors work by using two active elements to detect relative direction of motion of a heated body. When an object moves in the sensors field of view, a voltage waveform is produced. An example waveform can be seen to the left. Each sensor has about 90 degrees viewing angle but, with the help of a Fresnel lens and blinders, the final setup will consist of four sensors each with 45 degree viewing angle.
+The Pyro-Sensors is used to detect the movement of humans (or any heated body) in a defined field of view. These sensors work by using two active elements to detect relative direction of motion of a heated body. When an object moves in the sensors field of view, a voltage waveform is produced. An example waveform can be seen to the right. Each sensor has about 90 degrees viewing angle but, with the help of a Fresnel lens and blinders, the final setup will consist of four sensors each with 45 degree viewing angle.
 The output from the Pyro-Sensors cannot be read directly into the microcontroller, so the team has constructed an amplification circuit capable of amplifying the signal with a variable-gain of over 10,000 (80dB). The amplifier is a simple two-stage Op-Amp circuit using the LM324 series Op-Amps. The amplifier circuit can be seen in the gallery below.
-==== Datasheets ====
+^           Datasheets                                       ^
-  * {{:datasheets:pirmanual.pdf|Pyroelectric Infrared Sensor}}
+|{{:datasheets:pirmanual.pdf|Pyroelectric Infrared Sensor}}  |
-  * {{:datasheets:lp324n.pdf|LP324N Op-Amp}}
+|{{:datasheets:lp324n.pdf|LP324N Op-Amp}}                    |
@@ Line 24: / Line 24: @@
 The thermopile array uses the I<sup>2</sup>C interface to communicate with the microcontroller.
-==== Datasheet ====
-  * [[http://www.robot-electronics.co.uk/htm/tpa81tech.htm|TPA81 - Infrared Thermopile Array]]
+^           Datasheets                                                                       ^
+|[[http://www.robot-electronics.co.uk/htm/tpa81tech.htm|TPA81 - Infrared Thermopile Array]]  |
 ===== Ultrasonic Range Finder =====
@@ Line 35: / Line 36: @@
 The SRF10 uses the I<sup>2</sup>C interface to communicate with the microcontroller.
-==== Datasheet ====
+^           Datasheets                                                                       ^
-  * [[http://www.robot-electronics.co.uk/htm/srf10tech.htm|SRF10 - Ultrasonic range finder]]
+|[[http://www.robot-electronics.co.uk/htm/srf10tech.htm|SRF10 - Ultrasonic range finder]]    |
+====== Software Development ======
+  * [[FourPIR|Code for relaying four PIR sensor data to the PC via the serial port]]
+  * [[OnePIR|Code for relaying one PIR sensor data to the PC via the serial port]]
+  * [[TPA81Read| Code to read raw data from the TPA81 sensor to the console]]
-===== Photos =====
+====== Photos ======
-^           [[photos|Photo Galleries]]             ^
+^           [[photos|Photo Galleries]]             ^^^
-|  [[Gallery-PIR|{{:gallery:dscn3002.jpg?300|}}]]  |
+|  [[Gallery-PIR|{{:gallery:dscn3002.jpg?200|}}]]  |  {{:gallery:pirsensor.gif?150|}}  |  {{:gallery:srf10.jpg?200|}}  |
-|  [[Gallery-PIR|PIR Amplifier]]                   |
+|  [[Gallery-PIR|PIR Amplifier]]                   |  PIR Sensor                       |  SRF10 Range Finder           |
+|  {{:gallery:thermopile.jpg?200|}}                    |                                   |                               |
+|  TPA81 Thermopile Array                          |                                   |                               |

human_detection_sensor_system.1236141807.txt.gz · Last modified: 2009/03/04 04:43 by jonmash

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