Название: Fundamentals of Measurement and Signal Analysis
Автор: Lingsong He, Bo Feng
Издательство: Springer
Год: 2022
Страниц: 379
Язык: английский
Формат: pdf (true), epub
Размер: 64.9 MB

This book introduces the basic analysis methods in signal processing, principles of various sensors and the concept of measurement system. To make students better understand and apply the theories, the book includes many MATLAB examples, such as the generation of standard signals and the spectrum analysis of audio signals in the signal processing part and Arduino examples as well, such as temperature measuring and ultrasonic ranging to show the applications of sensors. Readers can not only learn the fundamental theories but also get many opportunities to apply the theories to perform measurement tasks.

Measurement is an indispensable part of the development of modern electromechanical equipment and instrument. In engineering measurements, various physical quantities need to be measured to obtain accurate and quantitative results. Measurement is not only needed in various types of engineering tests but also in control, monitoring of machine status and fault diagnosis of machines. Thus, measurement systems are an important part of the machines and production lines. The main content of this book is measurement technology and instruments.

The basic task of measurement is to obtain useful information. Information is always contained in certain physical quantities. The changes of these physical quantities with time are called signals. In terms of physical properties, signals include electrical signals, optical signals, force signals and so on. Among them, electrical signals have obvious advantages in transformation, processing, transmission and application, and thus become the most widely used signal at present. Various non-electrical signals are often converted into electrical signals, and then transmitted, processed and used.

Windscreen wiper is an indispensable device in cars to remove rain, ice and dust from the front window of a car. Nowadays, most cars have automatic windscreen wiper that is turned on automatically when detecting water on the windscreen. We can try to simulate an automatic windscreen wiper using a capacitive humidity sensor, a servo, plastic sticks and an Arduino board. When there is water on the humidity sensor, the change in permittivity causes the change of capacitance. The servo starts to rotate the plastic sticks after detecting the presence of water.

Ultrasonic Ranging Device Based on Arduino: The principle of ultrasonic ranging has already been explained. With an ultrasonic ranging module (HC-SR04), we can build our own ultrasonic ranging device. The reference code below needs a computer to display the measured distance. We recommend you try to add an LCD screen to display the distance and use a battery to power your board, so you can build a portable device.