22-10-2012, 11:57 AM
Wireless Stepper Motor Control using RF Communication
Wireless Stepper Motor.docx (Size: 24.36 KB / Downloads: 51)
ABSTRACT:
Stepper motor is found with finds lot applications in computer peripherals, business
machines, process control, machine tools and robotics. Especially in robotics and process
control like silicon processing, I.C Bonding and Laser trimming applications, it is
necessary to control the stepper motor from remote places. This project is to control the
stepper motor from remote place using RF modules. This deals with the design and
development of hardware and software for Wireless Stepper motor control system.
Three switches are used to control the direction of the stepper motor at the transmitter side. The status of these switches is transmitted using RF transmitter and received by the RF receiver. The microcontroller at the receiver will be continuously monitoring the status of these switches received from the decoder and performs the corresponding action.
The RF modules used here are STT-433 MHz Transmitter, STR-433 MHz
Receiver, HT640 RF Encoder and HT648 RF Decoder. The three switches are interfaced
to the RF transmitter through RF Encoder. The encoder continuously reads the status of
the switches, passes the data to the RF transmitter and the transmitter transmits the data.
At the receiving end, the RF receiver receives this data, gives it to RF decoder.
This decoder converts the single bit data into 8-bit data and presents it to the
microcontroller. Now, it is the job of the controller to read the data and perform the
corresponding action i.e., to rotate the stepper motor clockwise, anticlockwise or entirely
stop it.
16 X 2 Liquid Crystal display (LCD) is provided at the receiver side to display the status of the stepper motor. ULN driver is used to drive the stepper motor.
This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down transformer.
Applications
Robotics and Wireless Robot Arm
Industries are using RF solutions for monitoring, process, control,
inventory tracking, data links and bar code reading devices.
Commercial wireless applications such as door announcers, security and
access systems, gate control, remote activation, score board and paging
systems.
Automotive companies employing RF for wireless remote control, remote
keyless entry and safety applications.
Consumer products including electronic toys, home security, gate and
garage door openers, intercom, fire and safety systems and irrigation
controllers
Medical products like patient call and monitoring, handicap assistance
device, surgery communication system, remote patient data logging and
ECG monitor