Through the following key select activities, students investigate the behavior of pressure and heat sensitive piezoelectric films. They use these materials to make a coin-counting and other smart sensing devices.
Activity 3: Making a Microphone
Students assemble, operate, and evaluate a piezoelectric microphone system.
Activity 5: Measuring Piezoelectric Response
Students investigate the piezoelectric and pyroelectric responses of PVDF film and summarize the relationship between force and heat and the film's voltage response.
Design Project 1: Designing a Coin Counter
Students design, construct, test, and redesign a smart-sensor coin counter using PVDF. They are challenged to distinguish among coin denominations using the voltage response of PVDF film.
Connecting to Your Curriculum
Materials World Modules are simple to organize and inexpensive to run. They are designed to be easily incorporated into any middle school science or high school science lab or lecture course. The chart below lists the subjects covered in the Activities and Design Projects sections of this module.
Physics & Physical Science
Earth & Space Science
Biology and Life Science
Heat Seeking Rattler
A rattlesnake can easily strike at a motionless person in a pitch-dark room.
- What kind of sensors must the animal have to detect a person when neither sight nor sound are available?
- How does Wien’s law show you how the snake can find its victim?
Solutions and Clues in Smart Sensors Module.