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Name of project : Controlling of Quadropter by hand gestures

Sample review of Final Year Project. Name of project : Controlling of Quadropter by hand gestures Batch Mates : N . Arivazhagan V.J. Chandra Hassan T. Emmanuel Jonathan S. Rajiv. Radio Control:

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Name of project : Controlling of Quadropter by hand gestures

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  1. Sample reviewof Final Year Project Name of project : Controlling of Quadropter by hand gestures Batch Mates : N. Arivazhagan V.J. Chandra Hassan T. Emmanuel Jonathan S. Rajiv

  2. Radio Control: • The R/C pilot controls the model by a radio link, which means by using electromagnetic radiation. • Basically the R/C equipment consists of a Transmitter operated by the pilot and the airborne units consisting in a Receiver together with one or more Servos depending on the number of channels used and a Battery pack. • The picture shows a four channel RC Transmitterand battery pack.

  3. Block Diagram of The Transmitter

  4. Where, • PPM - Pulse position module • ADC – Analogue to Digital Converter • POT 1, POT 2 , POT 3, POT 4 – Potentiometers • RF – Radio Frequency board

  5. PPM System (Pulse Position Modulation): • There are several data encoding/decoding systems on the market today. The older one is PPM (Pulse Position Modulation). • The PPM encoding system consists of a data frame containing a synchronizing pulse followed by a number of shorter pulses equal to the number of channels. The frame duration is about 20mS, which means the data is being send at a frequency of about 50Hz.

  6. The transmitter encoder circuit reads each control potentiometer's value and switch's position sequentially, converting each value to a pulse width. • The width of each pulse corresponds to the respective motor throttle. A control in neutral position gives a pulse of 1.5mS and in the end position may be either 1 or 2mS depending on which way the control has been moved.

  7. Sync Pulse : • As you can see, there is a rather large phase in the signal where it is kept at LOW level. • This is called the “Sync Pulse” and indicates that a sequence of pulses indicating the status of the transmitter levers is about to follow. • The Sync pulse would be of different length in different transmitters and is about 12 Milliseconds in the HITEC transmitter.

  8. It is followed by a rather short positive pulse which is always of constant length. • After that, the signal is pulled LOW again and remains there for a time which is dependent on the position of the joystick on the transmitter. • Then comes another positive IPG and Channel 2 and so forth until all channels have been transmitted and the next Sync pulse can start. • Then comes another Channel 2 and so forth until all channels have been transmitted and the next Sync pulse can start.

  9. Hand Glove Controller: The hand glove controller mainly consists of the following essential components, They are: • A Glove • Accelerometer • Throttle resistive strip • Yaw resistive strip, and • A microcontroller board.

  10. Glove: • The glove used here can be mostly of any material which is not very tightly or closely bound to the fingers or of very stretching material. • It can be majorly of the type of gloves used in cricket, as it is the best suiting material for the project.

  11. Accelerometer: • An accelerometer is a device that measures proper acceleration, also called the four-acceleration. • For example, an accelerometer on a rocket accelerating through space will measure the rate of change of the velocity of the rocket relative to any inertial frame of reference. • Accelerometers are good for measuring tilt angles of your airframe relative to gravity (technically, this is referred to as "pitch" and "roll").

  12. Bend Resistor Strip: • The Bend Resistor Strip can also be called as the Bend-Flex Sensor Strip. • The Flex Sensor is a unique component that changes resistance when bent. The Flex sensor has a normal resistance of 10 K ohms at 0 degrees. As the flex sensor is bent in either direction the resistance gradually decreases. ( 1 K ohm to 20 K ohm)

  13. The throttle bend resistor strip is used to increase and decrease the throttle by the action of bending these resistor strips with the help of the middle finger. • The yaw bend resistor strip is used to produce yaw motion towards the right or the left side by the action of bending these strips with the help of the thumb.

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