公(gong)司自誕生起致力(li)于精(jing)密(mi)醫l療(liao)器械部(bu)件的加工，研(yan)發(fa)和組裝，為各醫l療(liao)器械公(gong)司提供質量的零部(bu)件為己任。

超聲(sheng)(sheng)(sheng)換能器(qi)（超聲(sheng)(sheng)(sheng)探頭(tou)）是醫學(xue)超l聲(sheng)(sheng)(sheng)儀(yi)器(qi)系(xi)統的重要(yao)組(zu)成部分，它(ta)(ta)在新型醫學(xue)儀(yi)器(qi)的研(yan)制和(he)醫學(xue)研(yan)究中(zhong)，占(zhan)有相當重要(yao)的位置。超聲(sheng)(sheng)(sheng)診斷中(zhong)，首(shou)先必須(xu)向人(ren)體(ti)發(fa)射超聲(sheng)(sheng)(sheng)波(bo)，然后接(jie)收人(ren)體(ti)組(zu)織結構信息的反射回波(bo)。起(qi)信息轉(zhuan)換作用的是超聲(sheng)(sheng)(sheng)換能器(qi)，ptfe芯軸哪(na)家(jia)好，由它(ta)(ta)完成一種電-聲(sheng)(sheng)(sheng)和(he)聲(sheng)(sheng)(sheng)-電轉(zhuan)換，換能器(qi)的性(xing)能狀況直(zhi)接(jie)關系(xi)著超聲(sheng)(sheng)(sheng)設備的性(xing)能。

磁致伸(shen)縮磁致伸(shen)縮有鎳片換(huan)(huan)能(neng)器(qi)和鐵(tie)氧體(ti)換(huan)(huan)能(neng)器(qi)。鐵(tie)氧體(ti)換(huan)(huan)能(neng)器(qi)的(de)電(dian)(dian)(dian)(dian)聲(sheng)轉換(huan)(huan)效(xiao)率(lv)(lv)比較低，使(shi)(shi)用(yong)一、二年后效(xiao)率(lv)(lv)下降，甚至幾乎喪失電(dian)(dian)(dian)(dian)聲(sheng)轉換(huan)(huan)能(neng)力。鎳片換(huan)(huan)能(neng)器(qi)的(de)工藝(yi)復雜，價格(ge)昂貴，所以很少(shao)使(shi)(shi)用(yong)。壓(ya)電(dian)(dian)(dian)(dian)晶體(ti)成熟可靠的(de)是以壓(ya)電(dian)(dian)(dian)(dian)效(xiao)應(ying)實現電(dian)(dian)(dian)(dian)能(neng)與聲(sheng)能(neng)相互轉換(huan)(huan)的(de)器(qi)件，ptfe芯(xin)軸(zhou)(zhou)價格(ge)，稱(cheng)為壓(ya)電(dian)(dian)(dian)(dian)換(huan)(huan)能(neng)器(qi)。壓(ya)電(dian)(dian)(dian)(dian)效(xiao)應(ying)將電(dian)(dian)(dian)(dian)信(xin)號轉換(huan)(huan)為機(ji)械振動。這種換(huan)(huan)能(neng)器(qi)電(dian)(dian)(dian)(dian)聲(sheng)轉換(huan)(huan)，ptfe芯(xin)軸(zhou)(zhou)報價，原材料價格(ge)便宜，制(zhi)作方(fang)便，也不容易老化。常用(yong)的(de)材料有石(shi)(shi)英(ying)晶體(ti)、鈦酸(suan)鋇(bei)(bei)和鋯鈦酸(suan)鉛(qian)。石(shi)(shi)英(ying)晶體(ti)的(de)伸(shen)縮量太小(xiao)，3000V電(dian)(dian)(dian)(dian)壓(ya)才產生0.01um以下的(de)變形。鈦酸(suan)鋇(bei)(bei)的(de)壓(ya)電(dian)(dian)(dian)(dian)效(xiao)應(ying)比石(shi)(shi)英(ying)晶體(ti)大20-30倍，但效(xiao)率(lv)(lv)和機(ji)械強(qiang)度不如石(shi)(shi)英(ying)晶體(ti)。鋯鈦酸(suan)鉛(qian)具有二者的(de)優點(dian)，可用(yong)作超聲(sheng)波清洗，ptfe芯(xin)軸(zhou)(zhou)，探傷和小(xiao)功率(lv)(lv)超聲(sheng)波加工的(de)換(huan)(huan)能(neng)器(qi)。壓(ya)電(dian)(dian)(dian)(dian)換(huan)(huan)能(neng)器(qi)的(de)應(ying)用(yong)十分廣泛， 它(ta)按應(ying)用(yong)的(de)行(xing)業(ye)分為工業(ye)、 農業(ye)、 交通運輸、生活、醫l療及(ji)等。

壓(ya)電陶瓷換能器電感與(yu)電容匹配特(te)性研究

采用(yong)等效(xiao)電(dian)(dian)(dian)(dian)路法 ， 推(tui)導了(le)不同匹配(pei)(pei)條件下(xia)壓電(dian)(dian)(dian)(dian)換能(neng)(neng)器(qi)軍效(xiao)阻抗與匹配(pei)(pei)參數(shu)公(gong)式 ， 并獲得了(le)換能(neng)(neng)器(qi)的l佳電(dian)(dian)(dian)(dian)路匹配(pei)(pei)參數(shu) 。 結果表明 ， 利用(yong)所(suo)得公(gong)式 ， 可精(jing)l確計算出l佳匹配(pei)(pei)參數(shu) ， 從而有效(xiao)提高(gao)壓電(dian)(dian)(dian)(dian)換能(neng)(neng)器(qi)的機(ji)電(dian)(dian)(dian)(dian)轉(zhuan)換效(xiao)率。

阻抗匹配電路原理與(yu)應用

阻抗匹(pi)配基本原理與(yu)概念，阻抗匹(pi)配常見于各級(ji)放大電(dian)(dian)路之間，放大電(dian)(dian)路與(yu)負載之間，信號與(yu)傳輸電(dian)(dian)路之間。微波(bo)電(dian)(dian)路與(yu)系統(tong)的(de)設計中，無論是(shi)有源還是(shi)無源，都(dou)必須(xu)考慮匹(pi)配問(wen)題，其根本原因是(shi)低頻電(dian)(dian)路中為電(dian)(dian)壓與(yu)電(dian)(dian)流，而(er)高頻中導行電(dian)(dian)磁波(bo)不(bu)匹(pi)配就會發(fa)生嚴重的(de)反射，損壞(huai)儀(yi)器和設備，文(wen)中闡述相(xiang)應的(de)解決方法。