My Profile
Active Members
TodayLast 7 Days
more...
Awards & Gifts
Online Exams
Fresher Jobs
Our fresher job section is exclusively for fresh graduates! Find jobs for freshers in major Indian
cities including Bangalore, Chennai, Hyderabad, Pune or Kochi
Resources
Find educational articles, blogs, discussion threads and other resources.
Colleges
Find details about any college in India or search for courses.
|
VISION CONTROL MOTION
Posted Date:
Total Responses: 0
Posted By: krishan Member Level: Gold Points/Cash: 8
|
Vision Control Motion
Components/tools required
1. Webcam/digital camera.
2. PC interface.
3. DC motors.
4. Serial port.
5. Microcontroller (AT89C51).
6. Optocoupler (MCT2E)
7. Voltage level converter MAX232.
8. .NET framework.
System Description
The system for VCM consists of:
1. Image acquisition setup: It consists of a video camera, web camera, or an analogue
camera with suitable interface for connecting it to processor.
2. Processor: It consists of a personal computer.
3. Image analysis: Certain tools are used to analyze the content in the image captured
and derive conclusions.
4. Machine control: After making the conclusion, mechanical action is to be taken.
The block dia can be represented as:
1. Image capturing can be done using video camera available in various resolutions e.g.
640 x 480 pixels. There are two types of cameras generally available: Digital cameras
(CCD – charge coupled device and CMOS sensor based) and analogue cameras. Digital
cameras generally have a direct interface with computer (USB port), but analogue cameras require suitable grabbing card or TV tuner card for interfacing with PC.
Power requirements: CCD cameras give high quality, low-noise images. It generates an
analog signal and uses analog to digital converter (ADC) and thus consumes high power.
CMOS cameras have lesser sensitivity resulting in poor image quality but consume
lesser power resulting in more battery life.
2. Image analysis consists of extracting useful information from the captured images. We
first decide the characteristics of the object to look for, in the image. This characteristic of
the object must be as robust as possible. For the purpose of tracking or identifying the object we utilize color of object.
3. Machine control consists of controlling a motor/robot based on the conclusion derived from image analysis. To achieve this using PC, its parallel port or serial port can be used for driving the robot.
Complete Algorithm-
Modules in which project can be divided
1. Power supply- It basically consist of a transformer, a rectifier circuit and a regulaor and filter circuit. The transformer steps down the 220 V a/c. into 12 V a/c. The transformer work on the principle of magnetic induction, A/c. voltage is then fed to the bridge rectifier. The rectifier circuit is used in most electronic power supplies is the single-phase bridge rectifier with capacitor filtering, usually followed by a linear voltage regulator. A rectifier transforms alternating current into direct current by limiting or regulating the direction of flow of current. The output resulting from a rectifier is a pulsating D.C. voltage. This voltage is not appropriate for the components that are going to work through it.
2.Microcontroller base- Here we are using AT80C52 microcontroller. The architecture of 89C52 is same as that of the AT89C51. The AT89C51 is a low power, high performance CMOS 8-bit microcontroller with 4Kbytes of Flash programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s high density non volatile memory technology. This device is compatible with the industry standard 8051 instruction set and pin out. The on-chip Flash allows the program memory to be quickly reprogrammed using a nonvolatile memory programmer such as the PG302 (with the ADT87 adapter). By combining an industry standard 8-bit CPU with Flash on a monolithic chip, the 8951 is a powerful microcomputer which provides a highly 4 Kbytes of Flash
3. Isolator circuit- Optocouplers are good devices for conveying analog information across a power supply isolation barrier, they operate over a wide temperature range and are often safety agency approved they do, however, have many unique operating considerations.
Optocouplers are current input and current output devices. The input LED is excited by changes in drive current and maintains a relatively constant forward voltage. The output is a current which is proportional to the input current. The output current can easily be converted to a voltage through a pull-up or load resistor.
Complete circuit Diagram-
4. MAX232- RS-232 was created for one purpose, to interface between Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) employing serial binary data interchange. So as stated the DTE is the terminal or computer and the DCE is the modem or other communications device. RS 232 is the most widely used serial I/O interfacing standard. In RS 232, a 1 is represented by -3 to -25 v. while a 0 bit is +3 to + 25 v, making -3 to +3 undefined. For this reason, to connect any RS 232 to a microcontroller system we must use voltage converters such as MAX 232 to convert the TTL logic levels to the RS 232 voltage level, and vice versa. This chip is used when interfacing micro controller with PC to check the Baud rate and changes the voltage level because micro controller is TTL compatible whereas PC is CMOS compatible. MAX 232 IC chips are commonly referred to as line drivers.
5. Mechanical part- It will be consisting of three DC motors one for left motion other for right motion of machine and last one for flipping the object. In simplest
term, they are machines which convert electrical energy into mechanical energy. A few
examples of familiar electric motors include motors to raise and lower car windows,
ceiling fans, and motors that spin CDs and DVDs.
A linear motor is a basic easy-to-understand electrical motor. Although the linear design is not useful for most practical electrical motors, the concepts, that are learned here, are useful in understanding rotating DC motors.
This section will introduce or review: some basic concepts of magnets and magnetic flux, the Lorentz force law, Faraday's law and then finally the simple DC linear motor.
Any problem in preparing the above project-
Contact me at krishan.dhiman@rediffmail.com
|
Project Feedbacks
|
| Author: pooja shankar | Member Level: Bronze | Revenue Score:  | hello,
I did not understand the action taken after the image is analysed and what is the component used to analyse the image? can you please explain.
|
|
|
| Post Feedback |
|
|
You must Sign In to post a feedback.
|
|
|
|
|
Advertise Here
|