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所在平台: Coursera |
课程主页: https://www.coursera.org/learn/pressure-force-motion-humidity-sensors
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课程名称：压力、力、运动和湿度传感器 课程概述： 《压力、力、运动和湿度传感器》是科罗拉多大学博尔德分校电气工程硕士学位课程 ECEA 5342 的一部分。此课程为我们关于嵌入式传感器和电机专题的第三门课程。为了充分利用本课程，您应先完成我们的第一门课程《传感器和传感器电路》。本课程假设您已经掌握了我们为实验选择的硬件和软件开发工具包的使用。 学习目标： 完成本课程后，您将能够： - 理解如何为机械设计指定合适的交流或直流电机。 - 根据电机电压、电流、扭矩和速度的分析，整合电机到机械系统中。 - 实现电机及相关的旋转传感器，并构建硬件和软件的电机控制电路。 - 将电机和电机控制电路添加到基于微处理器的开发工具包中。 - 创建硬件和固件，将电机反馈数据处理后送入微处理器，以进行进一步评估。 此外，您还将学习： - 如何为实时过程数据指定合适的压力、力、应变、位置、运动、加速度、占用和湿度传感器。 - 将这些传感器集成到嵌入式系统中，包括硬件和软件方面。 - 将传感器及传感器接口添加到微处理器开发工具包中。 - 创建硬件和固件，处理传感器信号，并将数据传送至微处理器进行更深入评估。 课程内容： - **模块1：压力传感器**：学习如何为嵌入式电路指定和使用不同类型的压力传感器，包括压阻、容性和真空传感器。 - **模块2：力和应变传感器及触摸屏**：学习力和应变传感器的工作原理，及其在嵌入式电路中的应用。 - **模块3：位置、加速度和速度传感器**：学习磁检测传感器（如霍尔传感器和LVDT）及加速度计的工作原理。 - **模块4：运动、距离和湿度传感器**：学习如何为嵌入式电路指定和使用位置和运动探测器，及其在商业环境中的应用。 课程项目将包含用于完成应变计实验任务的相关材料。 适合对象：希望深入了解传感器及其在嵌入式系统中应用的电气工程专业学生或工程技术人员。
Name:Pressure Sensors
Description:In module 1 you will learn how to specify and use various types of pressure sensors for an embedded circuit. First, you will learn about piezoresistive, capacitive, and vacuum sensors. This includes a deep dive into the piezoresistive effect and how a Wheatstone bridge is used in these systems. This is followed by a discussion on pressure transmitters and how to calculate an error budget. Finally, we will give you examples of commercial pressure sensors and explain what you need to know to purchase them on a web site.
Name:Force and Strain Sensors and Touch Screens
Description:In module 2 you will learn how to specify and use various types of force and strain sensors for an embedded circuit. First, you will learn about how strain gauges use the piezoresistive effect and Wheatstone bridges to output a strain signal. Then you will learn how load cells use strain gauges to output a force signal. We have a video on a teardown of a weight scale for you to watch, where we teach you how the strain gauges are arranged in an unusual bridge circuit. Finally, we teach you about how touch screens used in kiosks, PC's and smart phones work. We have a lab exercise for you to perform on strain gauges, where you will get hands-on experience wiring the gauges into the PSoC system, and writing code to read the gauges.
Name:Position, Acceleration and Velocity Sensors
Description:In module 3 you will first learn how magnetic detection sensors such as Hall sensors and LVDT's work, as well as how capacitive detection sensors. Then you will learn how to specify and use accelerometers in an embedded circuit. We will discuss how the first accelerometers used the piezoelectric effect to output a sinusoidal signal. We will review the key principles and equations involved in vibrational measurement. Then you will learn later accelerometers used the piezoresistive effect and internal strain gauges to output a sinusoidal signal representative of force, as opposed to acceleration. Then we will explain how accelerometers are now using MEMS technology and changes in capacitive to output the signal. We teach you about gyroscopes, both traditional mechanical ones, still used in aircraft for angular position sensing, and modern MEMS ones used to determine angular velocity.
Name:Motion, Distance and Humidity Sensors
Description:In module 4 you will learn how to specify and use position and motion detectors in an embedded circuit. First, you will learn about the pyroelectric effect. Then you will learn how Passive Infrared motion detectors use the pyroelectric effect in commercial burglar alarms. Then you will learn how ultrasonic distance detection is accomplished, the same principles that whales, dolphins and bats use to navigate their worlds. We tackle microwave detection sensors last, as these are the most complex sensors that we cover in the course. They are used in long range position detection sensors and commercial security sensors for outdoors use.
Name:Course Projects
Description:This module contains the materials you need to complete the Strain Gauge lab assignment.
"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
