ฝึกพูดภาษาอังกฤษด้วยเทคนิค Shadowing จากวิดีโอ: Adding an E-Stop to our Conveyor Build! #plc #automation #engineering #robotics #mechatronics
กำลังสร้างบทเรียน...
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This one's for the safety lovers.
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Today we're adding an emergency stop, aka e -stop, to our conveyor system.
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Most industrial equipment with moving hazards require clear and easy access to e -stops.
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Stuff gets jammed in moving parts.
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People find ways to insert themselves into parts of the machine you never expected e -stops need to be readily available, often at multiple points in the machine.
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There are many ways to incorporate e -stops, but the simplest is to use it to physically interrupt power to your motion component.
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You don't want to kill power to an entire PLC, lose diagnostics, telemetry, and it could take a lot longer to recover from.
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Instead, we take the loop that feeds the motor starter or drive and interrupt that with the e -stop.
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Also a requirement that when an e -stop is pressed and then released, the machine does not unexpectedly resume motion,
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so the PLC definitely needs to know that the e -stop was hit because a reset command has to be sent.
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Fortunately, many e -stops have a normally open and normally closed circuit.
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We can take the normally closed circuit for our motor connection.
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When it gets hit, we can use the normally open circuit to tell the PLC that the e -stop's been pressed.
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Now we can write PLC logic to require a reset, share a tag to our HMI to display to the operator that an e -stop's been pressed,
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and even add it to a SQL database log to log when e -stops have been pressed.
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Getting your e -stop placement and electrical design right is critically important for user safety on any machine.
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Even though just our motor command is relatively low stakes for this build, Next, we'll be adding in a pick and place gantry to this cell
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and having an e -stop to kill that motion is going to be essential.
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Vocabulary and speaking notes for this lesson
This video has 18 sentences and 319 words to shadow. The speech runs for 1:32. The speaker talks fast, about 208 words per minute, so expect linked and reduced sounds. Only 76% of the words are among the 3,000 most common in English, so the vocabulary is demanding.
Key vocabulary in this video
15 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| circuit noun | /ˈsɝ.kɪt/ | The act of moving or revolving around, or as in a circle or orbit; a revolution |
| reset verb | /ɹiːˈsɛt/ | To set back to the initial state. |
| interrupt verb | /ˌɪntəˈɹʌpt/ | To disturb or halt (an ongoing process or action, or the person performing it) by interfering suddenly, especially by speaking. |
| electrical adjective | /ɪˈlɛktɹɪkəl/ | Related to electricity (or electronics) |
| component noun | /kəmˈpoʊ.nənt/ | A smaller, self-contained part of a larger entity. Often refers to a manufactured object that is part of a larger device. |
| operator noun | /ˈɑpəˌɹeɪtɚ/ | A person or organisation that operates a device, system, service, etc. |
| database noun | /ˈdeɪtəˌbeɪs/ | A collection of (usually) organized information in a regular structure, usually but not necessarily in a machine-readable format accessible by a computer. |
| physically adverb | /ˈfɪz.ɪ.kli/ | In a physical manner. |
| loop noun | /luːp/ | A length of thread, line or rope that is doubled over to make an opening. |
| recover verb | /ɹɪˈkʌvɚ/ | To get back, to regain (a physical thing; in astronomy and navigation, sight of a thing or a signal). |
| lover noun | /ˈlʌvɚ/ | One who loves and cares for another person in a romantic way; a sweetheart, love, soulmate, boyfriend, girlfriend, or spouse. |
| requirement noun | /ɹɪˈkwaɪɹmənt/ | A necessity or prerequisite; something required or obligatory. Its adpositions are generally of in relation to who or what has given it, on in relation to whom… |
| jam noun | /ˈd͡ʒæm/ | A sweet mixture of fruit boiled with sugar and allowed to congeal. Often spread on bread or toast or used in jam tarts |
| stake noun | /steɪk/ | A piece of wood or other material, usually long and slender, pointed at one end so as to be easily driven into the ground as a marker or a support or stay. |
| resume verb | /ˈɹɛz.ə.meɪ/ | To start (something) again that has been stopped or paused from the point at which it was stopped or paused; continue, carry on. |
ไวยากรณ์ในวิดีโอนี้
โครงสร้างที่ผู้พูดใช้บ่อยที่สุด พร้อมคำพูดจริงจากวิดีโอ:
| โครงสร้าง | ในวิดีโอ |
|---|---|
| Passive voice be + กริยาช่อง 3 — เน้นสิ่งที่เกิดขึ้น ไม่ใช่ผู้กระทำ | is pressed · was hit · been pressed |
| Present perfect have/has + กริยาช่อง 3 — เหตุการณ์ในอดีตที่ยังเกี่ยวข้องกับปัจจุบัน | have been pressed |
Pronunciation to watch
The speaker uses 3 contractions and reduced forms, such as don't, we'll, we're. Say them the short way, as you hear them.
- Long words — get the stress right: electrical /ɪˈlɛktɹɪkəl/, operator /ˈɑpəˌɹeɪtɚ/, fortunately /ˈfɔɹ.t͡ʃə.nɪt.li/, critically /ˈkɹɪt.ɪ.kə.li/, incorporate /ɪŋˈkɔɹ.pɚ.eɪt/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Start at 0.75× speed, shadow it sentence by sentence, then go back to normal speed once it feels easy.
- Record yourself and compare with the original, paying attention to words like circuit, reset, interrupt.
เทคนิค Shadowing คืออะไร?
Shadowing เป็นเทคนิคการเรียนรู้ภาษาที่ได้รับการรับรองทางวิทยาศาสตร์ พัฒนาขึ้นสำหรับการฝึกนักแปลมืออาชีพ วิธีการนี้เรียบง่ายแต่ทรงพลัง: คุณฟังเสียงภาษาอังกฤษจากเจ้าของภาษาและพูดตามทันที — เหมือนเงาที่ตามผู้พูดด้วยช่วงเวลาห่าง 1-2 วินาที การวิจัยแสดงว่าเทคนิคนี้ปรับปรุงความแม่นยำในการออกเสียง ทำนองเสียง จังหวะ การเชื่อมเสียง การฟังเข้าใจ และความคล่องแคล่วในการพูดได้อย่างมีนัยสำคัญ