Which of the following describes an optical shaft encoder?
The correct answer is A: A device that detects rotation by interrupting a light source with a patterned wheel. Which of the following describes an optical shaft encoder is a device that detects rotation by interrupting a light source with a patterned wheel. Optical encoders detect rotation using light interruption. For amateur radio operators, this is important for optoelectronics knowledge. Understanding this helps when working with encoders.
Exam Tip
Optical shaft encoder = device that detects rotation by interrupting light source with patterned wheel. Think 'O'ptical 'S'haft 'E'ncoder = 'O'ptical 'S'ensing 'E'ncoder (rotation detection). Optical encoders detect rotation using light interruption. Not light measurement, not computing device, not RTTY generation - just rotation detection by interrupting light.
Memory Aid
"Optical shaft encoder = device that detects rotation by interrupting light source with patterned wheel. Think 'O'ptical 'S'haft 'E'ncoder = 'R'otation detection. Optical encoders detect rotation using light interruption. Important for optoelectronics knowledge."
Real-World Application
An optical shaft encoder: It's a device that detects rotation by interrupting a light source with a patterned wheel. As the wheel rotates, it interrupts the light, creating pulses that indicate rotation. This is what it is - rotation detection by interrupting light.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Device measuring strength of light beam using ADC isn't an encoder - encoder detects rotation by interrupting light. Light measurement isn't encoder.
Option C: Incorrect. Optical computing device with fiber optics isn't an encoder - encoder detects rotation by interrupting light. Computing device isn't encoder.
Option D: Incorrect. Device generating RTTY signals by rotating light source isn't an encoder - encoder detects rotation by interrupting light. RTTY generation isn't encoder.
题目解析
The correct answer is A: A device that detects rotation by interrupting a light source with a patterned wheel. Which of the following describes an optical shaft encoder is a device that detects rotation by interrupting a light source with a patterned wheel. Optical encoders detect rotation using light interruption. For amateur radio operators, this is important for optoelectronics knowledge. Understanding this helps when working with encoders.
考试技巧
Optical shaft encoder = device that detects rotation by interrupting light source with patterned wheel. Think 'O'ptical 'S'haft 'E'ncoder = 'O'ptical 'S'ensing 'E'ncoder (rotation detection). Optical encoders detect rotation using light interruption. Not light measurement, not computing device, not RTTY generation - just rotation detection by interrupting light.
记忆口诀
Optical shaft encoder = device that detects rotation by interrupting light source with patterned wheel. Think 'O'ptical 'S'haft 'E'ncoder = 'R'otation detection. Optical encoders detect rotation using light interruption. Important for optoelectronics knowledge.
实际应用示例
An optical shaft encoder: It's a device that detects rotation by interrupting a light source with a patterned wheel. As the wheel rotates, it interrupts the light, creating pulses that indicate rotation. This is what it is - rotation detection by interrupting light.
错误选项分析
Option B: Incorrect. Device measuring strength of light beam using ADC isn't an encoder - encoder detects rotation by interrupting light. Light measurement isn't encoder. Option C: Incorrect. Optical computing device with fiber optics isn't an encoder - encoder detects rotation by interrupting light. Computing device isn't encoder. Option D: Incorrect. Device generating RTTY signals by rotating light source isn't an encoder - encoder detects rotation by interrupting light. RTTY generation isn't encoder.
知识点
Optical shaft encoder, Detects rotation, Interrupting light source, Patterned wheel
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.