Control technolgy lesson 4
- 1. CONTROL TECHNOLOGY Lesson Four: Decision Tables
- 2. LESSON AIMS • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 3. EXAMPLE OF A STREET LIGHT FLOWCHART: Start Switch output 3 YES on Is light less than 50? NO Switch output 3 off • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 4. DECISION TABLES A decision table is used to make it clear what the different options are for a system that has sensors: Purpose of the system: open the door when people are present Device What the sensor says? Automatic Door Person near Door Open N o person near Door Close • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 5. GREEN HOUSE MIMIC AUTOMATIC SYSTEMS Can you work out what are the different inputs and outputs in this mimic? • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 6. GREEN HOUSE MIMIC: AUTOMATIC SYSTEMS: Inputs: Outputs: Moisture Heater Temp Light Sun Window Sprinkler • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 7. GREEN HOUSE MIMIC: DECISION TABLES: If the value of the sun is greater than 20; the what should happen to the sprinkler output? Purpose of the system: Water the pants if too hot Device What the sensor says? Sprinkler Light Level > 20 ON OFF DO NOTHING Light Level < 20 ON OFF DO NOTHING • ALL: Know what a decision table is. Remember: • MOST: Produce a Flowol program that controls a simulated environment. > means more than • SOME: Explain the advantages of computer control over human. < means less than
- 8. GREENHOUSE MIMIC Now go on to Flowol and open up the greenhouse mimic; can you work out how to create a program to make it run? • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 9. GREENHOUSE MIMIC: COMPLETED • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
- 10. PLENARY After completing this flowchart; what are the advantages of using a computer controlled system? Discuss in pairs. HOMEWORK What would be the advantage of using a human to control the system? • ALL: Know what a decision table is. • MOST: Produce a Flowol program that controls a simulated environment. • SOME: Explain the advantages of computer control over human.
Editor's Notes
- #2: This should be a recap on children’s previous knowledge.