Automated Systems Lesson 4 Stationary v Mobile Robots

Automated Systems Lesson 4: Stationary v Mobile Robots

Lesson 4: Automated Systems By the end of this lesson you will be able to: 1. Identify what the initials AGV stand for. 2. Identify 2 guidance systems for AGVs. 3. Suggest a suitable guidance system for an AGV working in a dirty environment. 4. Suggest a suitable guidance system for an AGV working in a clean environment. 5. Explain the term ROM software. 6. Give 2 advantages of using ROM softare. 7. Give 2 disadvantages of using ROM software. 8. Explain why real time processing is essential for AGVs. 9. Explain what it means to be an intelligent robot. 10. Explain the impact automation has had on the design of the workplace.

Lesson 3: Automated Systems Stationary v Mobile Robots A stationary robot is fixed in one location in a workplace. A mobile robot is a robot that can move around a workplace. Mobile robots are some times called AGVs: Autonomous Guided Vehicles. AGVs are often used in workplaces to fetch and carry parts from a warehouse to where they are needed

Lesson 4: Automated Systems Mobile Robot Guidance Systems AGVs need to be have a guidance system to tell them how to get from A to B. There are 2 types of guidance systems: 1. light guidance systems 2. magnetic guidance systems. Which is best? OR Which system is used depends on the: • how messy the workplace is and • how often the system might need to be changed. OR

Lesson 3: Automated Systems An interface is needed between a sensor and the controlling computer. The interface is required because sensors are analogue yet the controlling computer understands digital data only. The interface converts the signals. Analogue signals vary in strength: eg temperature goes gradually up and down pressure gradually builds and fades. Digital signals are either 0 or 1: 0000111000110 Control program instruction Interface feedback Interface data Sensor

Lesson 3: Automated Systems AD and DA Converters An AD converter is the interface that translates analogue data into digital data. 100 o. C AD Converter 01100100 digital analogue A DA converter is the interface that translates digital data into analogue data. 0 digital DA Converter OFF analogue

Questions Lesson 3: Automated Systems Answer the following questions in your jotter. 1) Name the part of the automated system that control the action. 2) Why is a sensor needed? 3) List 3 types of sensors and explain what each could be used for. 4) Explain the term feedback. 5) Why is feedback necessary? 6) What happens as a result of feedback? 7) Explain why a interface is required. 8) Draw a diagram of where an interface will be positioned in system. 9) What is an AD converter? 10)What does a DA converter do and why?

Fun Things To Do Try programming the Picobot using it’s sensor. Try programming Lego Robot cars. Robots with a sense of touch http: //news. nationalgeographic. com/news/2005/08/0817_050817_robotskin. html Beetles & Sensors http: //news. nationalgeographic. com/news/2003/03/0314_030314_secretweapons 3. html Robot Cars http: //news. nationalgeographic. com/news/2005/10/1006_051006_robot_car_2. html Smart Cars http: //news. nationalgeographic. com/news/2004/05/0521_040521_smartcars. html