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Wika熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)是中低溫(wen)(wen)區(qu)醉常用的(de)一(yi)種(zhong)溫(wen)(wen)度(du)(du)檢測器。熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)測溫(wen)(wen)是基于(yu)金(jin)屬(shu)(shu)導體的(de)電(dian)(dian)(dian)阻(zu)(zu)(zu)值隨溫(wen)(wen)度(du)(du)的(de)增加而增加這一(yi)特性來(lai)進行溫(wen)(wen)度(du)(du)測量(liang)的(de)。它的(de)主要特點是測量(liang)精度(du)(du)高，性能穩定。其中鉑熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)測量(liang)精que度(du)(du)是醉高的(de)，它不僅廣(guang)泛(fan)應(ying)(ying)用于(yu)工業測溫(wen)(wen)，而且被(bei)制(zhi)(zhi)成標準(zhun)的(de)基準(zhun)儀。熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)大(da)都由純金(jin)屬(shu)(shu)材(cai)料(liao)(liao)制(zhi)(zhi)成，目(mu)前(qian)應(ying)(ying)用多(duo)(duo)的(de)是鉑和銅(tong)，此外，現(xian)在(zai)已開始采用鎳(nie)、錳和銠等材(cai)料(liao)(liao)制(zhi)(zhi)造熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)。金(jin)屬(shu)(shu)熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)常用的(de)感溫(wen)(wen)材(cai)料(liao)(liao)種(zhong)類較多(duo)(duo)，醉常用的(de)是鉑絲(si)。工業測量(liang)用金(jin)屬(shu)(shu)熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)材(cai)料(liao)(liao)除鉑絲(si)外，還有銅(tong)、鎳(nie)、鐵、鐵-鎳(nie)等。對Wika熱(re)(re)(re)電(dian)(dian)(dian)阻(zu)(zu)(zu)的(de)安裝，...

溫度(du)(du)變送(song)(song)器(qi)是(shi)一種(zhong)將(jiang)溫度(du)(du)變量(liang)(liang)(liang)轉換(huan)為(wei)可傳(chuan)送(song)(song)的(de)(de)(de)標(biao)準(zhun)化輸出(chu)(chu)信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)儀(yi)表(biao)。主(zhu)(zhu)要用于工業過程溫度(du)(du)參(can)數(shu)的(de)(de)(de)測(ce)量(liang)(liang)(liang)和控制。采用熱電(dian)(dian)(dian)偶、熱電(dian)(dian)(dian)阻作(zuo)為(wei)測(ce)溫元件(jian)，從測(ce)溫元件(jian)輸出(chu)(chu)信(xin)(xin)(xin)號(hao)(hao)(hao)送(song)(song)到變送(song)(song)器(qi)模塊，經過穩壓濾波、運算放大、非線性校正、V/I轉換(huan)、恒(heng)流及反(fan)向(xiang)保(bao)護等電(dian)(dian)(dian)路處理后，轉換(huan)成(cheng)(cheng)與溫度(du)(du)成(cheng)(cheng)線性關系的(de)(de)(de)4~20mA電(dian)(dian)(dian)流信(xin)(xin)(xin)號(hao)(hao)(hao)0-5V/0-10V電(dian)(dian)(dian)壓信(xin)(xin)(xin)號(hao)(hao)(hao)，RS485數(shu)字信(xin)(xin)(xin)號(hao)(hao)(hao)輸出(chu)(chu)。將(jiang)物理測(ce)量(liang)(liang)(liang)信(xin)(xin)(xin)號(hao)(hao)(hao)或普通電(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)轉換(huan)為(wei)標(biao)準(zhun)電(dian)(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)輸出(chu)(chu)或能夠(gou)以通訊協議方式輸出(chu)(chu)的(de)(de)(de)設備。溫度(du)(du)變送(song)(song)器(qi)是(shi)將(jiang)溫度(du)(du)變量(liang)(liang)(liang)轉換(huan)為(wei)可傳(chuan)送(song)(song)的(de)(de)(de)標(biao)準(zhun)化輸出(chu)(chu)信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)儀(yi)表(biao)，主(zhu)(zhu)要...

溫(wen)度(du)變(bian)送(song)(song)器是(shi)一種(zhong)將(jiang)溫(wen)度(du)變(bian)量(liang)(liang)轉(zhuan)(zhuan)換(huan)(huan)為(wei)可傳送(song)(song)的(de)標(biao)(biao)準(zhun)(zhun)化(hua)輸出信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)儀表(biao)。主要(yao)用(yong)于工業過程(cheng)溫(wen)度(du)參數(shu)的(de)測量(liang)(liang)和控制。采用(yong)熱電(dian)(dian)偶(ou)、熱電(dian)(dian)阻作為(wei)測溫(wen)元(yuan)件，從(cong)測溫(wen)元(yuan)件輸出信(xin)(xin)(xin)號(hao)(hao)(hao)送(song)(song)到變(bian)送(song)(song)器模塊，經(jing)過穩(wen)壓(ya)(ya)濾(lv)波、運(yun)算放大、非線(xian)性校正(zheng)、V/I轉(zhuan)(zhuan)換(huan)(huan)、恒(heng)流及反向(xiang)保護等電(dian)(dian)路(lu)處理(li)后，轉(zhuan)(zhuan)換(huan)(huan)成(cheng)與溫(wen)度(du)成(cheng)線(xian)性關系的(de)4~20mA電(dian)(dian)流信(xin)(xin)(xin)號(hao)(hao)(hao)0-5V/0-10V電(dian)(dian)壓(ya)(ya)信(xin)(xin)(xin)號(hao)(hao)(hao)，RS485數(shu)字信(xin)(xin)(xin)號(hao)(hao)(hao)輸出。將(jiang)物理(li)測量(liang)(liang)信(xin)(xin)(xin)號(hao)(hao)(hao)或普通電(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)轉(zhuan)(zhuan)換(huan)(huan)為(wei)標(biao)(biao)準(zhun)(zhun)電(dian)(dian)信(xin)(xin)(xin)號(hao)(hao)(hao)輸出或能夠(gou)以(yi)通訊協議方式輸出的(de)設備。溫(wen)度(du)變(bian)送(song)(song)器是(shi)將(jiang)溫(wen)度(du)變(bian)量(liang)(liang)轉(zhuan)(zhuan)換(huan)(huan)為(wei)可傳送(song)(song)的(de)標(biao)(biao)準(zhun)(zhun)化(hua)輸出信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)儀表(biao)，主要(yao)...

MAC比(bi)(bi)(bi)例(li)(li)(li)閥(fa)(fa)是一種(zhong)新型的(de)(de)液(ye)壓(ya)控(kong)制(zhi)裝置(zhi)。在(zai)普通壓(ya)力閥(fa)(fa)、流(liu)量(liang)(liang)閥(fa)(fa)和方向(xiang)閥(fa)(fa)上(shang)，用比(bi)(bi)(bi)例(li)(li)(li)電(dian)(dian)磁鐵替(ti)代原有的(de)(de)控(kong)制(zhi)部分，按(an)輸入的(de)(de)電(dian)(dian)氣信(xin)號連續地、按(an)比(bi)(bi)(bi)例(li)(li)(li)地對(dui)油流(liu)的(de)(de)壓(ya)力、流(liu)量(liang)(liang)或方向(xiang)進(jin)行(xing)(xing)(xing)遠距離控(kong)制(zhi)。MAC比(bi)(bi)(bi)例(li)(li)(li)閥(fa)(fa)一般都具有壓(ya)力補償(chang)性能，輸出壓(ya)力和流(liu)量(liang)(liang)可以不受負載變化的(de)(de)影響(xiang)。MAC比(bi)(bi)(bi)例(li)(li)(li)閥(fa)(fa)的(de)(de)工作原理(li)。指(zhi)令信(xin)號經比(bi)(bi)(bi)例(li)(li)(li)放(fang)大器進(jin)行(xing)(xing)(xing)功率放(fang)大，并(bing)(bing)按(an)比(bi)(bi)(bi)例(li)(li)(li)輸出電(dian)(dian)流(liu)給MAC比(bi)(bi)(bi)例(li)(li)(li)閥(fa)(fa)的(de)(de)比(bi)(bi)(bi)例(li)(li)(li)電(dian)(dian)磁鐵，比(bi)(bi)(bi)例(li)(li)(li)電(dian)(dian)磁鐵輸出力并(bing)(bing)按(an)比(bi)(bi)(bi)例(li)(li)(li)移動(dong)閥(fa)(fa)芯的(de)(de)位置(zhi)，即(ji)可按(an)比(bi)(bi)(bi)例(li)(li)(li)控(kong)制(zhi)液(ye)流(liu)的(de)(de)流(liu)量(liang)(liang)和改變液(ye)流(liu)的(de)(de)方向(xiang)，從而實現對(dui)執行(xing)(xing)(xing)機(ji)構的(de)(de)位置(zhi)或速度控(kong)制(zhi)。在(zai)某些對(dui)位置(zhi)...

隨著(zhu)液壓(ya)(ya)(ya)傳動(dong)和(he)(he)(he)液壓(ya)(ya)(ya)伺(si)(si)服(fu)(fu)系統(tong)(tong)的(de)(de)發展，生(sheng)產實踐中出現一些即要(yao)(yao)求能夠(gou)連續(xu)的(de)(de)控(kong)(kong)制(zhi)(zhi)壓(ya)(ya)(ya)力、流(liu)量和(he)(he)(he)方向(xiang)，又(you)不(bu)需(xu)要(yao)(yao)其控(kong)(kong)制(zhi)(zhi)精(jing)度很(hen)高的(de)(de)液壓(ya)(ya)(ya)系統(tong)(tong)。由(you)于普(pu)通的(de)(de)液壓(ya)(ya)(ya)元件不(bu)能滿(man)足(zu)具有(you)一定(ding)的(de)(de)伺(si)(si)服(fu)(fu)性要(yao)(yao)求，而(er)使用電(dian)(dian)液伺(si)(si)服(fu)(fu)閥(fa)(fa)又(you)由(you)于控(kong)(kong)制(zhi)(zhi)精(jing)度要(yao)(yao)求不(bu)高而(er)過于浪(lang)費(fei)，因此近幾年(nian)產生(sheng)了介(jie)于普(pu)通液壓(ya)(ya)(ya)元件（開(kai)關控(kong)(kong)制(zhi)(zhi)）和(he)(he)(he)伺(si)(si)服(fu)(fu)閥(fa)(fa)（連續(xu)控(kong)(kong)制(zhi)(zhi)）之間的(de)(de)比(bi)例(li)(li)控(kong)(kong)制(zhi)(zhi)閥(fa)(fa)。MAC比(bi)例(li)(li)閥(fa)(fa)是一種新型(xing)的(de)(de)液壓(ya)(ya)(ya)控(kong)(kong)制(zhi)(zhi)裝(zhuang)置(zhi)。在(zai)普(pu)通壓(ya)(ya)(ya)力閥(fa)(fa)、流(liu)量閥(fa)(fa)和(he)(he)(he)方向(xiang)閥(fa)(fa)上，用比(bi)例(li)(li)電(dian)(dian)磁鐵替代原有(you)的(de)(de)控(kong)(kong)制(zhi)(zhi)部(bu)分，按(an)輸(shu)入的(de)(de)電(dian)(dian)氣信號連續(xu)地、按(an)比(bi)例(li)(li)地對(dui)油流(liu)的(de)(de)壓(ya)(ya)(ya)力、流(liu)量或方向(xiang)進行遠距離控(kong)(kong)制(zhi)(zhi)。M...

倍加福P+F絕對(dui)(dui)值編(bian)(bian)(bian)碼(ma)器是將(jiang)(jiang)信號（如比特流）或數(shu)據(ju)進行編(bian)(bian)(bian)制、轉換為可(ke)用以通(tong)訊(xun)、傳(chuan)輸和(he)(he)存儲(chu)的信號形(xing)式(shi)(shi)(shi)的設備。編(bian)(bian)(bian)碼(ma)器把角位(wei)(wei)移(yi)或直線位(wei)(wei)移(yi)轉換成電(dian)信號，前(qian)者稱(cheng)為碼(ma)盤，后者稱(cheng)為碼(ma)尺(chi)。按照讀出方式(shi)(shi)(shi)編(bian)(bian)(bian)碼(ma)器可(ke)以分為接觸式(shi)(shi)(shi)和(he)(he)非接觸式(shi)(shi)(shi)兩(liang)種；按照工作原理編(bian)(bian)(bian)碼(ma)器可(ke)分為增(zeng)量(liang)式(shi)(shi)(shi)和(he)(he)絕對(dui)(dui)式(shi)(shi)(shi)兩(liang)類。增(zeng)量(liang)式(shi)(shi)(shi)編(bian)(bian)(bian)碼(ma)器是將(jiang)(jiang)位(wei)(wei)移(yi)轉換成周(zhou)期(qi)性(xing)的電(dian)信號，再把這個(ge)(ge)電(dian)信號轉變(bian)成計數(shu)脈沖，用脈沖的個(ge)(ge)數(shu)表示(shi)位(wei)(wei)移(yi)的大小。絕對(dui)(dui)式(shi)(shi)(shi)編(bian)(bian)(bian)碼(ma)器的每一個(ge)(ge)位(wei)(wei)置對(dui)(dui)應一個(ge)(ge)確定的數(shu)字碼(ma)，因此(ci)它(ta)的示(shi)值只(zhi)與測量(liang)的起始和(he)(he)終止(zhi)位(wei)(wei)置有關(guan)，而與測量(liang)的中間過(guo)程無(wu)關(guan)。編(bian)(bian)(bian)碼(ma)...

倍加福P+F絕對值編(bian)(bian)(bian)(bian)碼(ma)器(qi)是將信(xin)號（如比特流）或數據(ju)進行編(bian)(bian)(bian)(bian)制、轉(zhuan)換為可用以(yi)通訊、傳(chuan)輸和(he)存儲(chu)的(de)(de)信(xin)號形式(shi)(shi)的(de)(de)設備。編(bian)(bian)(bian)(bian)碼(ma)器(qi)把(ba)角(jiao)位(wei)移或直(zhi)線(xian)位(wei)移轉(zhuan)換成電信(xin)號，前者稱(cheng)為碼(ma)盤，后者稱(cheng)為碼(ma)尺。按照讀出方(fang)式(shi)(shi)編(bian)(bian)(bian)(bian)碼(ma)器(qi)可以(yi)分(fen)為接觸式(shi)(shi)和(he)非(fei)接觸式(shi)(shi)兩種(zhong)；按照工作原(yuan)理編(bian)(bian)(bian)(bian)碼(ma)器(qi)可分(fen)為增量(liang)式(shi)(shi)和(he)絕對式(shi)(shi)兩類。增量(liang)式(shi)(shi)編(bian)(bian)(bian)(bian)碼(ma)器(qi)是將位(wei)移轉(zhuan)換成周期性(xing)的(de)(de)電信(xin)號，再把(ba)這(zhe)個(ge)(ge)電信(xin)號轉(zhuan)變成計數脈(mo)沖(chong)，用脈(mo)沖(chong)的(de)(de)個(ge)(ge)數表示位(wei)移的(de)(de)大小。絕對式(shi)(shi)編(bian)(bian)(bian)(bian)碼(ma)器(qi)的(de)(de)每一個(ge)(ge)位(wei)置對應一個(ge)(ge)確定的(de)(de)數字碼(ma)，因此它(ta)的(de)(de)示值只與測量(liang)的(de)(de)起始(shi)和(he)終止位(wei)置有關，而(er)與測量(liang)的(de)(de)中(zhong)間過程無(wu)關。編(bian)(bian)(bian)(bian)碼(ma)...

rexroth柱塞(sai)泵(beng)(beng)是液(ye)壓系統(tong)的(de)(de)一(yi)個(ge)(ge)重(zhong)要(yao)裝置(zhi)。它依(yi)靠(kao)柱塞(sai)在缸(gang)體(ti)中(zhong)往復運(yun)動(dong)(dong)，使密封工(gong)作容(rong)腔的(de)(de)容(rong)積發生變化來實現(xian)吸(xi)油(you)(you)、壓油(you)(you)。柱塞(sai)泵(beng)(beng)具有(you)額定壓力高(gao)、結(jie)(jie)構(gou)緊湊、效率(lv)高(gao)和(he)流(liu)(liu)量(liang)調(diao)節方便等優點。rexroth柱塞(sai)泵(beng)(beng)被廣泛應用于(yu)高(gao)壓、大流(liu)(liu)量(liang)和(he)流(liu)(liu)量(liang)需(xu)要(yao)調(diao)節的(de)(de)場合，諸如液(ye)壓機、工(gong)程(cheng)機械(xie)和(he)船舶(bo)中(zhong)。結(jie)(jie)構(gou)組成主(zhu)要(yao)有(you)偏心輪、柱塞(sai)、彈(dan)簧、缸(gang)體(ti)、兩個(ge)(ge)單(dan)向(xiang)閥。柱塞(sai)與缸(gang)體(ti)孔之間形(xing)成密閉(bi)容(rong)積。偏心輪旋(xuan)轉(zhuan)(zhuan)(zhuan)一(yi)轉(zhuan)(zhuan)(zhuan)，柱塞(sai)上(shang)下(xia)往復運(yun)動(dong)(dong)一(yi)次，向(xiang)下(xia)運(yun)動(dong)(dong)吸(xi)油(you)(you)，向(xiang)上(shang)運(yun)動(dong)(dong)排油(you)(you)。泵(beng)(beng)每(mei)轉(zhuan)(zhuan)(zhuan)一(yi)轉(zhuan)(zhuan)(zhuan)排出的(de)(de)油(you)(you)液(ye)體(ti)積稱為(wei)排量(liang)，排量(liang)只與泵(beng)(beng)的(de)(de)結(jie)(jie)構(gou)參數(shu)有(you)...