ELEC207 semester1

发表于 2022-04-26 更新于 2022-05-29 分类于 ELEC207 阅读次数： Valine：

忘光了

本博客草草创建，简陋不堪。本人才疏学浅，笔记也不过给诸君作一参考。如有疑惑/错漏/建议还请使用这个匿名提问箱，我会一一回复。 不过现在本博客也增加了评论功能，你也可以直接在底下说。不过这个评论功能没有提醒……回复可能会不够及时。

https://www.tapechat.net/uu/5r0pL8/ZV9H0543

week2

A

两种误差(统计，随机)，四种噪声。

Accuracy and precision

Accuracy：准度，结果和实际值差别越小越准

Precision：精度，多次结果之间差别越小越精

tolerance

公差，元器件本身的误差

resolution and sensitivity

resolution：分辨率 how finely its output scale is divided into subdivisions

sensitivity：灵敏度 measure of the output change when the input changes

hysteresis：迟滞：正着来反着来有不同的曲线（比如摩擦）

B

WEEK3

应变，应力，弹性系数。

泊松比

Gauge factor：应变导致电阻变化。测量第一步

bridge:

电压变化太小可以再加个放大器。

应用

full bridge：上下各2个

week 4

week 5

cold junction：已知温度的一端

WEEK 6

Incremental encoders: • Are simpler and less expensive; • Have a resolution which depends on the number of windows in the tracks; • Do not provide an absolute measurement, so are subject to errors in case of missed pulses; • They are therefore more suitable for speed measurements than for angular position measurements. Absolute encoders: • Are more complex and more expensive using more tracks; • Have a resolution which depends on the number of tracks (and detectors); • Provide an absolute measurement, so are potentially more accurate for angular position measurements.