'Follow me' car (A brief introduction)

  Recently, automatic technologies are increasingly being employed to make everyday tasks simpler and easier. Therefore, we decide to develop the automatic following technology. This technology has a very broad applications. For example, this technology can be used in an automatic following luggage. That means, the users do not need to pull their luggage because their suitcases will follow them automatically. In addition, this technology can also be used in some factories. Once the automatic following technology is put to use, no more manpower will be wasted to transport weights. All the wagons can follow one person automatically. We plan to design an automatic following car as an example of the automatic following technology. The prototype of this product is shown in the picture below. Our automatic following car is consists of a car and a handle. The car can recognize the handle as a target and follow it. 



Figure 1: The prototype of the automatical following car

  We have some roughly ideas about how to achieve our goals. First, one ultrasonic wave sensor will be used to measure the distance between the people and the car from the car side and transfer the distance information to the main Arduino. Secondly, another ultrasonic wave sensor will be used to measure the distance between the car and the people from the people side and this distance will also be transmitted to the main Arduino. Second, comparing the distances returned by these two sensors. If they are the same the car is followed by the correct people, if not the people is out of target and the buzzer will be enabled. Meanwhile, the car will stop working. Therefore, the people will realize that their car is far away from them.

  In conclusion, our project can make the life more convenient. For Instance, it can also be used in shopping trolley and baby carriage. In this case, some disable people can use the baby carriage and the shopping trolley.

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Week 4: We got it

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Our work: 1. Refine the wire length in a proper visualization 2. Add some “feedback” functions to effectively control and monitor the car.  Method: Firstly, reduce the redundant wires such on the polarity. Next, to improve the integrated system, the feedback, as the significant part in a system, should be considered by adding monitor. The buzzer was chose as the output signal to inform customer that the car is out of limiting distance (50 cm) from their position. Two pins on the buzzer, one for ground and the other is for pin on Arduino, which could be activated by processor. Finally, the initial speed of car is too fast to easily test. Therefore, the PWM number was adjusted to 150 as the minimum number which could drive the motors. It is also have an interval to calculate the codes during the movement. What is more, the application of this model was re-discussed as the “auto-convey”, for example, it could be applied in factory, bank and supermarket. It will r...
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All the test videos

Video 1: First test, the car can do some movements but can not respond properly Video 1: Second test, the car can do some response movements when it detect the handle Video 3: The final test of the automatic following car
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Week 3: We are almost there

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Our work: 1.      Upgrade the construction by removing a slaver Arduino on the car 2.      The car initially could recognize the signal source and have some response movements. Method: The original hypothesis is to modulate each function as a component model. The alternative way is to synthesize the total car by using only one processor, which means impose one master processer instead of attachment slaver. Thus, there are only one master and one slaver communicating with wireless modulation which called as 315 mhz remote control. After connecting each wire, the predictable result is that when one distance of slaver ultrasonic is near to that of master, the wheels will rotate. These testing programs only ensure the conception was correct. The most complex part is to constrain the condition codes to make the response sense. In details, three slaver distances on the car compare to the distance on the controller, which difference is...
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