{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/6a3fb899cb67fc75ea335442/6a50822f81fe1f64606eaaaf?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"(TW Mandarin)｜心跳偵測是拿手電筒照手指？：PPG 感測器的「穿透與反射」 ✕ 雜學超碎念｜Slasher Snippets","thumbnail_width":200,"thumbnail_height":200,"thumbnail_url":"https://open-images.acast.com/shows/6a3fb899cb67fc75ea335442/1783661019035-21bb31e3-64bb-4400-88b6-92b6066daabf.jpeg?height=200","description":"<p>1. Quick Intro (For English Learners):</p><p>A quick review of PPG (Photoplethysmography) heart rate sensing technology and its practical circuit challenges. Key takeaways from the light-based detection methods, comparing transmissive and reflective sensors. Original concepts combined with personal thoughts, filtered through the raw, analytical lens of a 24-year-old STEM student.</p><p><br></p><p>2. 💡 本集雜學筆記 (Chinese Notes):</p><p>一、PPG 偵測原理：用光「數」脈搏</p><p>• PPG 透過 LED 打光到微血管，並由光二極體接收訊號，以此監測血流變化形成的脈搏波。</p><p>• 心臟跳動時血流量會改變光的吸收量，這種「蹦蹦」的脈衝訊號即為心率計算的基礎。</p><p>• 由於人體反射回來的光訊號極其微弱，電路上通常需要配置多級放大器來強化訊號。</p><p><br></p><p>二、兩大感測器架構：穿透式與反射式</p><p>• 穿透式（Transmissive）：光線直接穿過手指，接收器在另一側取樣，常見於醫療用的血氧夾。</p><p>• 反射式（Reflective）：LED 與接收器在同一側，利用特定角度接收反彈回來的光，是智慧手錶的主流。</p><p>• 兩者各有優劣，穿透式訊號較穩定，而反射式則因體積小、不限部位而更具應用彈性。</p><p><br></p><p>三、工程師的宿敵：環境光干擾與降噪</p><p>• 外部光源（如日光、日光燈）會對感測器造成嚴重干擾，讓回傳的訊號變得混亂且「髒髒的」。</p><p>• 為了過濾市電頻率與雜散光，必須在電路設計中加入嚴密的屏蔽與特定的濾波機制。</p><p>• 現代方案多將 LED 與接收器封裝成單一元件，以減少自行接電路時產生的雜訊地獄。</p><p><br></p><p>---</p><p>【給三心二意、什麼都想學的你。】</p><p><br></p><p>我是一個來自台灣，24歲斜槓斜到脊椎側彎的理工男。因為非常花心，每天都想學不同領域的內容。</p><p><br></p><p>這裡沒有精心包裝的逐字稿，也沒有高高在上的專家說教，只有一個 ENTP 用碎碎念的方式，讓知識無腦溜進你腦裡。</p><p><br></p><p>這 幾 分鐘，你能聽到什麼？</p><p>我會分享自己的生活裡各式各樣的想法、觀點，包含機器學習、甚至儒道法的現代應用想法</p><p><br></p><p>💡 頻道最強外掛：</p><p>不想做筆記？沒關係。本節目每集資訊欄皆附上「條列式雜學筆記」。你只需要戴上耳機聽我碎碎念，聽完直接把精華打包帶走。</p><p><br></p><p>這裡不搞內卷，不用有壓力，跟你一起開一次知識盲盒，我們一起讓學習變得好玩~</p><p><br></p><p>[For the curious minds who want to learn everything but never have the time to finish a long video.]</p><p><br></p><p>I’m a 24-year-old STEM guy from Taiwan, a \"slasher\" who's hustled so hard my spine literally got scoliosis. With my endlessly wandering curiosity, I want to explore a different field every single day.</p><p><br></p><p>You won’t find perfectly polished scripts or condescending expert lectures here. It's just an ENTP rambling in authentic Taiwanese Mandarin, letting knowledge—and real-life vocabulary—effortlessly slide right into your brain.</p><p><br></p><p>What can you expect to hear in these few minutes?</p><p>I'll be sharing a wide variety of thoughts and perspectives from my life, covering everything from machine learning to modern applications of Confucianism, Taoism, and Legalism.</p><p><br></p><p><br></p><p>💡 The Channel's Ultimate Hack:</p><p>Don't want to take notes? No problem. Every episode's show notes come with bullet-point insights . Just put on your headphones, practice your listening, and pack away the essence.&nbsp;</p><p><br></p><p>No toxic productivity (內卷 / Neijuan), no pressure. Join me to unbox a new \"knowledge blind box.\" Let's make learning fun together~</p><p><br></p><p>📌 Highly recommended for advanced learners looking for real Taiwanese Mandarin listening practice!</p><p><br></p><p>---</p><p>免責聲明：</p><p>本頻道所提供之內容僅供參考。雖然我努力提供準確且最新的資訊，但我並非所有領域的專業人士。內容可能包含主觀觀點或隨時間而失效的資訊。聽眾應自行判斷資訊的適用性，並在必要時諮詢相關領域的專家。本頻道對因使用或依賴本內容而導致的任何損失不負任何責任。</p>","author_name":"斜槓到脊椎側彎的理工男"}