S16: Biker Assist - Revision history

Proj user10: /* Design */

2017-05-25T19:41:34Z

‎Design

Proj user2: /* Hall Effect Sensor */

2017-04-01T20:41:57Z

‎Hall Effect Sensor

Proj user2: /* Turn Angle Detection Sensor */

2017-04-01T20:41:25Z

‎Turn Angle Detection Sensor

Proj user2: /* Abstract */

2017-04-01T20:40:40Z

‎Abstract

Proj user2: /* Abstract */

2017-04-01T20:40:15Z

‎Abstract

Proj user13: Undo revision 35545 by Proj user13 (talk)

2017-03-29T23:05:15Z

Undo revision 35545 by Proj user13 (talk)

Proj user13: Undo revision 35546 by Proj user13 (talk)

2017-03-29T23:04:50Z

Undo revision 35546 by Proj user13 (talk)

Proj user13: Undo revision 35547 by Proj user13 (talk)

2017-03-29T23:04:27Z

Undo revision 35547 by Proj user13 (talk)

Proj user13: Undo revision 35548 by Proj user13 (talk)

2017-03-29T23:04:01Z

Undo revision 35548 by Proj user13 (talk)

Proj user13: Undo revision 35549 by Proj user13 (talk)

2017-03-29T23:02:56Z

Undo revision 35549 by Proj user13 (talk)

@@ Line 239: / Line 239: @@
 [[File:CMPE_244_S16_Biker_Assist_Maxbotix_PCB_Board_diag.jpg|centre|400px|thumb|PCB Board Diagram]]
 <br><br>
 ==== EAGLE PCB Design Tool ====
 [[File:CMPE_244_S16_Biker_Assist_Maxbotix_PCB_Schematic_1.jpg|700px|thumb|PCB Schematic Diagram]]

@@ Line 356: / Line 356: @@
 <br>
-====='''Hall Effect Sensor '''=====
+=====Hall Effect Sensor =====
 A Hall effect sensor is a sensor that varies its output voltage in response to a magnetic field. Hall effect sensors are used for proximity switching, positioning, speed detection, and current sensing applications. The sensor operates as an analog transducer, directly returning a voltage. There three types of hall effect sensors, hall effect switch, hall effect latch and hall effect linear sensor. Hall effect switch turns on in the presence of a magnetic field. Hall effect latch holds its current state until the opposite polarity changes its state. Hall effect linear sensor varies its output voltage in proportional to the strength of the magnetic field near to it. In the absence of magnetic field, linear sensor output voltage is approximately 2.5V. When the south pole comes closer to the sensor, its output increases proportionally towards 5V. Its output voltage decreases towards 0V, when north pole is brought closer to the sensor. We used this property to to detect the turn angle direction. We designed our sensor arrangement such that a horizontal bar magnet attached to the handlebar and sensor to the bike frame. When a magnet moves with handlebar while taking turns, the output of the sensor varies. But the sensor MLX90215 which we used for this testing was not behaving as per the design. Its EEPROM needed to be programmed irs special programmer. After some testing, we decided to change our design and switched to thinpot.

@@ Line 337: / Line 337: @@
    [[File:CMPE_244_S16_Biker_Assist_Turn_Sensor_Assembly.jpg|centre|400px|thumb|Turn Sensor Assembly]]
-====='''Varying Resistance Sensor '''=====
+=====Varying Resistance Sensor =====
 This sensor functions using the principle of Ohm's law. This law dictates that the current is inversely proportional to resistance for a given voltage.
 The sensor has three terminals, two end points for connecting voltage across sensor and one middle terminal called wiper. As the wiper terminal traverse over the coil, sensor gives varying resistance across wiper and one of the other terminals and hence varying voltage. Varying voltage output pin is connected to the ADC of the micro-controller and exact turn angle can be determined. We worked on two different sensors working on this principle.
-'''Custom Resistance Coil '''<br>
+Custom Resistance Coil <br>
 To detect turn angle, we designed our custom coil. We wound high resistance wire on a semicircular base to look like a coil. This coil was attached to the fixed part of the bicycle. The third terminal acting as a wiper was attached to the moving part of the handlebar such that, it traverses over the coil. We attached two resistances of value 10K were attached before connecting to the battery. These two circuits formed a potential divider circuit and also avoided battery short circuit.
   [[File:CMPE_244_S16_Biker_Assist_Coil_Base.jpg|left|290px|thumb|Coil Base]]

@@ Line 1: / Line 1: @@
 =='''Biker Assist''' ==
-== '''Abstract''' ==
+== Abstract ==
 There are 60 million bicyclists on the road in the United States and 500,000 emergency department visits are due to bicycle-related injuries. The Biker Assist system increases the safety of bicyclists by improving how the bicyclist communicates with the rest of the road. Currently, the only way a bicyclist can signal to another vehicle that they are making a turn is by extending their arm in that direction, we propose a better way to accomplish this by using lights on the back of the bicyclist. These lights operate seamlessly and automatically without any input from the bicyclist so that the bicyclist can keep his attention on the road. There are distance sensors on each side of the bicyclist that alert the bicyclist of any vehicles in their blind spot by using a simple text-to-speech system. Also, the headlights operate automatically, turning on only when it is night time and turning off during the day time, without any direct input from the user.

@@ Line 1: / Line 1: @@
 =='''Biker Assist''' ==
-== Abstract ==
+== '''Abstract''' ==
 There are 60 million bicyclists on the road in the United States and 500,000 emergency department visits are due to bicycle-related injuries. The Biker Assist system increases the safety of bicyclists by improving how the bicyclist communicates with the rest of the road. Currently, the only way a bicyclist can signal to another vehicle that they are making a turn is by extending their arm in that direction, we propose a better way to accomplish this by using lights on the back of the bicyclist. These lights operate seamlessly and automatically without any input from the bicyclist so that the bicyclist can keep his attention on the road. There are distance sensors on each side of the bicyclist that alert the bicyclist of any vehicles in their blind spot by using a simple text-to-speech system. Also, the headlights operate automatically, turning on only when it is night time and turning off during the day time, without any direct input from the user.

@@ Line 56: / Line 56: @@
 |-
 ! scope="row"| 2
-| 03/27/2017
+| 03/22/2016
-| 04/02/2017
+| 04/04/2016
-| Order the parts
+| Reading data sheet and understanding the components
-| In progress
+| Completed
+| 04/04/2016
 |-
 |-

@@ Line 50: / Line 50: @@
 | 03/20/2017
 | 03/26/2017
 | Research on the components required and prepare a list
 | Completed
 | 03/26/2017
@@ Line 68: / Line 66: @@
 | 03/29/2016
 | 04/15/2016
-| Set up git and kanban board
+| Algorithm design and Coding
 | Completed
 | 04/15/2016

@@ Line 71: / Line 71: @@
 | 04/09/2017
+|
-*Study the data sheets components & prepare a high level design.
+*Set up git and kanban board
 | Not started
+|
@@ Line 77: / Line 77: @@
 |-
 ! scope="row"| 4
-| 04/10/2017
+| 04/15/2016
-| 04/16/2017
+| 04/25/2016
+| Distance sensor interfacing and Testing
-*Interface individual components to the controller and test their working
+| Completed
-| Not started
+| 05/01/2016
 |-
 |-

@@ Line 80: / Line 80: @@
 | 04/16/2017
+|
 *Interface individual components to the controller and test their working
 | Not started
@@ Line 87: / Line 86: @@
 |-
 ! scope="row"| 5
-| 04/17/2017
+| 04/15/2016
-| 04/27/2017
+| 04/25/2016
+| Automatic light interfacing and testing
-*Integrate sensors and motors
+| Completed
-*Test working of nordic wireless
+| 05/01/2016
 |-
 |-
 ! scope="row"| 6
-| 04/28/2017
+| 04/26/2016
-| 05/04/2017
+| 05/02/2016
+| Integrating and testing
-*Integrate camera with rest of the board
+| Completed
-*Each controller should be working individually by now. Stress test individual modules.
+| 05/16/2016
 |-
 |-
 ! scope="row"| 7
-| 05/05/2017
+| 05/03/2016
-| 05/18/2017
+| 05/16/2016
+| Testing and adding extra features
-*Continue with hardware/software development & integration and complete first phase of testing with the PCB
+| Completed
-*Test & fix basic integration bugs
+| 05/18/2016
 |-
 |-
 ! scope="row"| 8
-| 05/19/2017
+| 05/17/2016
-| 05/25/2017
+| 05/23/2016
 | Final testing and Demo
 | Completed