跟读练习: Types of Proximity Sensors! #automation #engineering #science #robotics #electronics - 通过视频学习英语口语

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19 句

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In automation, detecting part presence is pretty important, and this is most commonly done with proximity sensors.

Even within this part category, there are some important distinctions you should know about.

Firstly, because they use invisible light beams and they're sweet, let's talk about infrared sensors.

I've got two different types here.

This all-in-one style is a diffuse-style sensor, which emits the infrared light and looks for it bouncing back all in the same little tube.

Super easy to use and mount.

Downside is it can be less accurate in outdoor environments or with shiny and dark parts.

The other form of infrared sensor is a through beam sensor, and these are usually two pieces, with the emitter on one side of your conveyor or detection zone, and a receiver on the other.

They're a little more complicated to set up than the single unit, but much more reliable too.

These little fellas are inductive sensors, meaning they can only see metal or things that have inductive current.

You can run cardboard or plastic by these without detecting anything, because they're only useful for detecting metal.

Lastly, the capacitive style sensors can see a lot more and even be used to detect powders or liquids, with the trade-off being they can actually be too sensitive

and often need their sensitivity dialed back down a bit with a potentiometer to reduce noise.

One more pro gamer tip, pretty much all of these sensors can be found in PNP or NPN arrangement.

You can either source 24 volts to your PLC with a PNP sensor

or sync back to 0 volts with an NPN sensor.

Most digital input cards on a PLC can only handle one or the other.

Make sure you buy a sensor to match your card.

So which one of these sensors do you think is the right call for detecting components on our conveyor system?

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本课的词汇与口语要点

这段视频共有 19 个句子、319 个单词可供跟读。讲话部分时长为 1:36。说话人语速较快，每分钟约 200 个词，会出现较多连读和弱读。只有 75% 的单词属于英语最常用的 3,000 词，词汇难度较高。

视频中的重点词汇

视频中 15 个值得学习的单词，附发音和释义：

单词	发音	释义
sensor 名词	/ˈsɛn.sɚ/	傳感器 /传感器
detect 动词	/dɪˈtɛkt/	察覺 /察觉, 發覺 /发觉
infrared 形容词	/ˌɪnfɹəˈɹɛd/	紅外 /红外
beam 名词	/ˈbiːm/	梁, 橫梁
complicated 形容词	/ˈkɑm.plɪˌkeɪ.tɪd/	複雜 /复杂
mount 动词	/maʊnt/	騎 /骑
sensitive 形容词	/ˈsɛn.sɪt.ɪv/	敏感
liquid 名词	/ˈlɪk.wɪd/	液體 /液体, 液態 /液态
commonly 副词	/ˈkɑmənli/	通常
tube 名词	/tuːb/	筒
input 名词	/ˈɪnpʊt/	輸入 /输入
component 名词	/kəmˈpoʊ.nənt/	元件, 部件
reliable 形容词	/ɹɪˈlaɪəbl̩/	可靠, 穩妥 /稳妥
arrangement 名词	/əˈɹeɪnd͡ʒmənt/	排列, 安排
powder 名词	/ˈpaʊ.dɚ/	粉, 粉末

视频中出现的短语动词

单词	释义
back down 动词	做出讓步 /做出让步

视频中的语法

说话人最常用的结构，并附上视频中的原话：

结构	视频中的用法
被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的	can be found

需要注意的发音

说话人用了 4 次缩略和弱读形式，例如 they're, I've。请按听到的简短形式来说。

“sh” 和 “zh” 音: distinction /dɪˈstɪŋkʃən/, detection /dɪˈtɛk.ʃən/, automation /ˌɔ.təˈmeɪ.ʃən/, potentiometer /pəˌtɛn(t)ʃiˈɑmɪtəɹ/
长单词——注意重音位置: complicated /ˈkɑm.plɪˌkeɪ.tɪd/, invisible /ɪnˈvɪzəb(ə)l/, sensitivity /ˌsɛn.səˈtɪv.ə.ti/, proximity /pɹɒkˈsɪm.ɪ.ti/, automation /ˌɔ.təˈmeɪ.ʃən/

如何用这段视频练习

先完整听一遍视频，不要开口，记下不认识的单词。
先用 0.75 倍速逐句跟读，熟练之后再回到正常速度。
录下自己的声音并与原声对比，特别注意 sensor, detect, infrared 这类单词。

什么是跟读法？

跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。

影子跟读法: 阅读完整分步指南 →

跟读练习: Types of Proximity Sensors! #automation #engineering #science #robotics #electronics - 通过视频学习英语口语

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