freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

檢測技術(shù)與儀表課程設(shè)計論文-文庫吧資料

2024-12-09 22:29本頁面
  

【正文】 9 go. A wounding elegant people, the key is to control their own emotions. With the mouth is the most stupid behavior. A control negative emotions than a can take a city more powerful water flow slow, language is expensive. People spent two years of time to learn to speak, but to spend a few years time to shut up. That is a kind of ability, that is a kind of wisdom. 16, life is not perfect, sometimes, growth is not a cry, not an eyeful of tears, there is no trace of emotion, there is no gleam of hope, no desire, no action, no static, there is only one kind of downward sinking feeling, sink A murky? 6? 7? 6? 7 sink? 6? 7? 6? 7 toward the bottom of the sink. 17, in some way, do not go, you will not know the other side scenery is beautiful. To you is not good, you do not mind too much, no one has an obligation to you。t envy him A sum of, don39。am, like a movie, learn to appreciate, learn to be grateful, learn tolerance, and goodness, helping others. Instead of accusing the society, as into one。t envy who. Like a person is a kind of feeling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in the peace of mind。s mouth, because words will reduce its 檢測技術(shù)及儀表課程設(shè)計論文 18 importance。 you pain, no one can understand. Then you only tears to smile. 8, each people have youth, Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same。 loss of sink, Eritrea pany. When you are in adversity, may wish to change a point of view to think everything over to the good Think, because good mentality decided the fate of the! 7, people are tired, rest。 and when we are in a negative state of mind, you will find many depressed things。m afraid he turned to it as a joke to tell don39。t be narrowminded. Poke to care, is a kind of 檢測技術(shù)及儀表課程設(shè)計論文 17 openminded, a free and easy. 5, I am not afraid of others behind me a knife, I afraid to look back and see stab me, is my intention to treat people。t get into a blind alley, don39。 not unrewarding perfunctorily, but calm attitude of life of unrestrained selfconfidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrowminded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract trouble and worry, pletely depends on how we look at and deal with it. Don39。 not to have conquered, but to have fought well. 2, the plain is the background of life. Live a plain life, give up on themselves is not a coward, but the wise answers。 to implement , do not want to, dare not, not with disciplinary ruler to supervision。 注意事項 1 應(yīng)采用相應(yīng)的溫度補償措施 ; 2 導(dǎo)壓管盡量光滑,盡量短以減少壓降 。應(yīng)用于航空,航天,汽車,醫(yī)療設(shè)備等領(lǐng)域的差壓、液位、流量測控等。 圖 11 PTP801一體化型微差壓傳感器(液壓) 檢測技術(shù)及儀表課程設(shè)計論文 12 特點及結(jié)構(gòu) 采用 OEM 硅壓阻式差壓充油芯體組裝而成。 差壓 由于結(jié)垢導(dǎo)致管內(nèi)流動阻力增大,需要測量流動壓降,范圍為 0~50mm 水柱 。 10% ≤ 20W 誤差分析 1 管內(nèi)液體未充滿 2 液體中含有固相液體中含 有粉狀、顆粒或纖維等固體,可能產(chǎn)生的故障有 :① 漿液噪聲; ② 電極表面玷污; ③ 導(dǎo)電沉積層或絕緣沉積層覆蓋電極或襯里; ④襯里被磨損或被沉積物覆蓋,流通截面積縮小 ; 3 液體電導(dǎo)率超過允許范圍引發(fā)的問題液體導(dǎo)電率若接近下限值也有可能出現(xiàn)晃動現(xiàn)象。 特點 1 儀表結(jié)構(gòu)簡單、可靠,無可動部件,工作壽命長 ; 2 無截流阻流部件,不存在壓力損失和流體堵塞現(xiàn)象 ; 3 無 機械慣性,響應(yīng)快速,穩(wěn)定性好,可應(yīng)用于自動檢測、調(diào)節(jié)和程控系統(tǒng); 4 測 量精度不受被測介質(zhì)的種類及其溫度、粘度、密度、壓力等物理的影響; 5 采用聚四氟乙烯或橡膠材質(zhì)襯里和 Hc、 Hb、 316L、 Ti 等電極材料的不同組合可適應(yīng)不同介質(zhì)的需 要; 6 備有管道式、插入式等多種流量計型號; 7 采用 EEPROM 存貯器,測量運算數(shù)據(jù)存貯保護安全可靠 ; 8 具備一體化和分離型兩種型式 ; 9 高清晰度 LCD 背光顯示。另外 設(shè)計 46多電極結(jié)構(gòu),進一步保證了測量精度并且任何時候無需接地環(huán),減輕了儀表體積和安裝維護的麻煩。由于獨特的特點,目前已廣泛地應(yīng)用于工業(yè)上各種導(dǎo)電液體的測量。 考慮到被測流 量為微小流量,并且被測流體為人工配制的易結(jié)垢的高硬度水或是含有固體微粒等致垢物質(zhì)的流體, 考慮到它的腐蝕性, 選用 了 一體式電磁流量計( DN100,精度 ) 型號: HM69EMF。 精 度 級 負載電阻 ≤750Ω 使用環(huán)境溫度 20~ 90℃ 工作壓力 ~ MPa 外殼材料 PPR 介質(zhì)粘度 ≤, 對于粘度大的介質(zhì)或測量溫度低時易結(jié)晶的介質(zhì) ,可選用加熱夾套型液位計 供電電壓 1236VDC 輸出信號 420mA 介質(zhì)密度 ~ 環(huán)境振動 頻率 ≤25Hz 振幅 ≤ 過程連接 旁路側(cè)面安裝法蘭; DN25, 凸面 誤差分析: 1 壓力的泄漏 ; 2 引壓管道的摩擦損失 ; 3 液體介質(zhì)的管路中積集氣體 。 特點 1使用被測介質(zhì)廣泛,可測油、水及與 316 不銹鋼兼容的糊狀物,具有一定的防腐能力 ; 2高準確度、高穩(wěn)定性、選用進口原裝傳感器,線性好,溫度穩(wěn)定性高 ; 3體積小、重量輕、安裝、調(diào)試、使用方便 ; 4不銹鋼全封閉外殼,防水好 ; 5壓力傳感器直接感測被測液位壓力, 不受介質(zhì)起泡、沉積的影響 ; 6輸出信號穩(wěn)定性高易遠傳 。當(dāng)被測容器中的液位升降時 ,液位計主導(dǎo)管中的浮子也隨之升降,浮子內(nèi)的永久磁鋼通過磁耦合傳遞到現(xiàn)場指示器,驅(qū)動紅白翻柱轉(zhuǎn) 180176。 在此我 選用型號為 UHZ517C16 耐腐蝕 PPR型磁翻柱液位計 ,由于此儀表輸出信號穩(wěn)定性好, 防水、防污、防腐蝕性能好,準確度高,便于信號遠傳,便于對補水箱水位進行讀取。 相對濕度 5%~ 95% RH 熱電偶類型 E 分度號 |鎳鎘 銅鎳 熱電偶 對數(shù) 單支式 |通常接線端子為 2 個 安裝固定裝置 螺紋 M272 接線盒形式 防水式 熱電偶 外徑 mm Ф16mm 常用熱電偶保護管材料 1Cr18Ni9Ti 測溫元件形式 傳統(tǒng)裝配式芯子 熱電偶精度等級 II 級 變送器量程 0~ 150℃ 誤差 分析 導(dǎo)熱誤差,溫度計在水中插入的深度影響觀測值(插入太深,測量值偏高;插入太淺,測量值偏低) 注意 事項 溫度計以適當(dāng)?shù)拈L度直立插入水中 。 主要特點 1二線制輸出 420mA,抗干擾能力強; 2節(jié)省補償導(dǎo)線及安裝溫度變送器費用; 3測量 范圍大; 4冷端 溫度自動補償,非線性校正電路 。 圖 8 SARN23000M27300/15010帶溫度變送器熱電偶 工作原理及 應(yīng)用 熱電偶在工作狀態(tài)下所測得的熱電勢(電阻)的變化,經(jīng)過溫度變送器的電橋產(chǎn)生不平衡信號,經(jīng)放大后轉(zhuǎn)換成為 420mA 電信號給工作儀表,工作儀表便顯示所對應(yīng)的溫度值。 圖 6 WRNK031G型卡箍式熱電偶 技術(shù)指標 表 4 型號 分度號 測量 范圍 精度等級 接線盒形式 導(dǎo)熱板材料 安裝板材料 管道直徑 Dmm WRNK031G K 0~ 800 Ⅰ 大防噴接線盒 1Cr18Ni9Ti 1Cr18Ni9Ti Φ 50~ Φ 200 檢測技術(shù)及儀表課程設(shè)計論文 7 圖 7 WRNK031G型卡箍式熱電偶尺寸 誤差 分析 導(dǎo)熱誤差,傳熱誤差,輻射誤 差以及水浴影響,另外由于冷端溫度也會產(chǎn)生誤差。同時該產(chǎn)品裝上溫度轉(zhuǎn)換器后,具有抗干擾、精度高、穩(wěn)定性好等優(yōu)點并且節(jié)省了補償導(dǎo)線,是天然氣、石化、電站等行業(yè)中管道溫度測量的新型溫度傳感器。 實驗管壁溫( 20~ 80 ℃) 測量 由于被測管道進行水浴加熱,所以 選用了 WRNK031G 型卡箍式熱電偶。 ( + ltl) 熱響應(yīng)時間 表 3 套管直徑 熱響應(yīng)時間
點擊復(fù)制文檔內(nèi)容
教學(xué)課件相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號-1