SHS1 Robotics · Semester 1 Week 12: Sensors & Actuators

Lesson notes

Learning Objectives

Indicator: 1.1.3.LI.2 - Discuss the scientific principles underlying the operation of sensors.

By the end of the lesson, learners can:

Explain how at least four different types of sensors convert physical quantities (light, heat, sound, distance) into electrical signals.
Identify the role of transducers in sensor operation and distinguish between a sensor and a transducer.
Describe the basic working principles of light-dependent resistors (LDRs), thermistors, ultrasonic sensors, and microphones.
Discuss the relationship between sensor principles and biological sensing mechanisms, connecting to the previous lesson on living organisms.
Record observed boundary values (minimum and maximum detectable limits) for given sensors during group experimentation and explain their practical significance.

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Curriculum details

Strand: Principles of Robotic Systems (Strand 1)
Sub-strand: Sensors & Actuators (1.3)
Content standard: 1.1.3.CS.1 - 1.1.3.CS.1 Relate nature-inspired sensing, mechanics and controls to applications in robot sensory, architecture and control systems. 1.1.3.LO.1 Analyse the similarities between robots and living organisms and outline critical scientific principles that underpin how sensing is achieved in robots.
Indicator: 1.1.3.LI.2 - Discuss the scientific principles underlying the operation of sensors.
Suggested placement: Semester 1, Week 12 (Week 12 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 41

Exemplars (from the NaCCA curriculum)

Talk for Learning: Through questioning, discuss scientific principles underpinning various sensors' operation.

Experiential Learning: Test and discuss the behaviour of the various Sensors in groups. Record the limits/boundary values for all the sensors and discuss real-life situations where and how these sensors can be employed. Groups share discussions and observations with the class.

Assessment (1.1.3.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.

Teaching and Learning Resources:
- Videos
- Textbooks
- Online Resources
- Demonstration with Sensors