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Pressure, Force, Motion, and Humidity Sensors

Approx. 24 hours to complete

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Course Summary

This course covers the fundamentals of pressure, force, motion, and humidity sensors, including their design, applications, and practical use.

Key Learning Points

Learn the fundamentals of pressure, force, motion, and humidity sensors
Understand the design and applications of various sensors
Explore the practical use of sensors in real-world scenarios

Learning Outcomes

Understanding of different types of sensors and their applications
Ability to design and test sensors for real-world scenarios
Knowledge of sensor calibration and maintenance

Prerequisites or good to have knowledge before taking this course

Basic knowledge of physics and electronics
Familiarity with programming languages such as Python or C++

Course Difficulty Level

Intermediate

Course Format

Online self-paced
Video lectures
Quizzes and assignments

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Description

"Pressure, Force, Motion, and Humidity Sensors" can also be taken for academic credit as ECEA 5342, part of CU Boulder’s Master of Science in Electrical Engineering degree.

This is our third course in our specialization on Embedding Sensor and Motors. To get the most out of this course, you should first take our first course entitled Sensors and Sensor Circuits. Our first course gives you a tutorial on how to use the hardware and software development kit we have chosen for the lab exercises. This third course assumes that you already know how to use the kit. After taking this course, you will be able to: ● Understand how to specify the proper AC or DC motor for a machine design. ● Integrate the motor to a machine, based on analysis of motor equations for voltage, current, torque and speed. ● Implement the motor and accompanying rotary sensor into a motor control circuit in both hardware and software. ● Add a motor and motor control circuit into a microprocessor based development kit. ● Create hardware and firmware to process motor feedback data to a microprocessor for further evaluation. After taking this course, you will be able to: ● Understand how to specify the proper pressure, force, strain, position, motion, acceleration, occupancy, and humidity sensors for taking real-time process data. ● Implement these sensors into an embedded system in both hardware and software. ● Add the sensor and sensor interface into a microprocessor based development kit. ● Create hardware and firmware to process sensor signals and feed data to a microprocessor for further evaluation. In this course you will build the circuit from Video 7 (Lab Exercise on strain gauges), Module 2 (Force and Strain Sensors and Touch Screens), and use it to make screen shots of the timing of the switch. If you haven't already wired up the system and written all the software per the instructions of Video 7, please do so now. You will need to buy the following components to complete this assignment. Note that if you have already purchased the PSOC 5LP PROTOTYPING KIT, you do not need to buy it again. These parts may be purchased off the Digikey web site, www. Digikey.com. One part needs to be purchased off the Sparkfun website www.sparkfun.com. Or, you may obtain the specs from the site, and purchase them elsewhere. Digikey Part numbers are typed out here: 428-3390-ND CF14JT22K0CT-ND CF14JT100KCT-ND Table shown here: Index Quantity Part Number Description 1 1 428-3390-ND PSOC 5LP PROTOTYPING KIT 2 2 CF14JT22K0CT-ND RES 22K OHM 1/4W 5% AXIAL 3 1 CF14JT100KCT-ND RES 100K OHM 1/4W 5% AXIAL Sparkfun part numbers are typed out here: TAL221 Table shown here: Index Quantity Part Number Description 1 1 TAL221 Mini-load cell - 100g, straight bar Additional equipment needed: • Wire - various gauges and lengths • Breadboard • Oscilloscope – suggested models are: o PICOSCOPE 2204A-D2 available on www.digikey.com or o Digilent 410-324 | OpenScope MZ available on www.newark.com Depending on your budget, you can also investigate these models: o Hantek HT6022BE20MHz - https://www.amazon.com/dp/B009H4AYII o SainSmart DSO212 - https://www.amazon.com/dp/B074QBQNB7 o PoScope Mega50 USB - https://www.robotshop.com/en/poscope-mega50-usb-mso-oscilloscope.html o ADALM2000 - https://www.digikey.com/en/products/detail/analog-devices-inc./ADALM2000/7019661

Knowledge

● Choose the right pressure, force, strain, position, motion, acceleration, occupancy, and humidity sensor for an application
● Design these sensors into an embedded circuit.

Outline

Pressure Sensors
1: Course Introduction
2: Pressure Sensor Terminology
3: Piezoresistive Effect
4: Piezoresistive Pressure Sensors
5: Capacitive Pressure Sensors
6: Vacuum Sensors
7: Pressure Transmitters
8: Calculating A Sensor Error Budget
9: Pressure Sensor Applications
Reading Assignments
Video Assignments
Week 1 Quiz

Force and Strain Sensors and Touch Screens
1: Module 2 Introduction
2: Strain Gauges
3: Load Cells
4: Teardown Of Weighing Scale
5: Resistive Touch Screens
6: Capacitive Touch Screens
7: Lab Exercise On Strain Gauges
Reading Assignments
Video Assignments
Week 2 Quiz

Position, Acceleration and Velocity Sensors
1: Module 3 Introduction
2: Capacitive Detection Sensors
3: Magnetic Position Sensors
4: Principles Of Acceleration Sensors
5: Piezoelectric Accelerometers
6: Piezoresistive Accelerometers
7: Capacitive Accelerometers
8: Gyroscopes
Reading Assignments
Video Assignments
Reading Assignments
Video Assignments
Week 3 Quiz

Motion, Distance and Humidity Sensors
1: Module 4 Introduction
2: Pyroelectric Effect
3: Passive Infrared (PIR) Motion Detector
4: Ultrasonic Distance Sensor
5: Microwave Motion Detectors
6: Humidity Sensors
Reading Assignments
Video Assignments
Reading Assignments
Video Assignments
Week 4 Quiz

Course Projects
Strain Gauge Lab
Course Project Quiz

Summary of User Reviews

This course on pressure, force, motion, and humidity sensors has received positive reviews from many users. The course covers the fundamentals of sensors and their applications in various fields. One key aspect that many users thought was good is the course's practical approach, which allows learners to apply the concepts they learn in real-world scenarios.

Pros from User Reviews

Practical approach that allows learners to apply concepts in real-world scenarios
Good coverage of the fundamentals of sensors and their applications
Engaging and knowledgeable instructors
Clear and concise explanations
Useful assignments and quizzes

Cons from User Reviews

Some users felt the course was too basic and lacked advanced topics
Lack of interaction with instructors and other learners
Limited feedback on assignments
Some technical issues with the online platform
The course could benefit from more hands-on activities

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