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超聲波(bo)換(huan)能器材質分類(lei)
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超聲波換能器材質分類(lei)
超(chao)(chao)聲波(bo)(bo)換能(neng)(neng)(neng)器(qi)是將電能(neng)(neng)(neng)轉(zhuan)換成機(ji)械(xie)能(neng)(neng)(neng)超(chao)(chao)聲波(bo)(bo)的器(qi)件,其中(zhong)*成熟可靠的是以壓電效應實現電能(neng)(neng)(neng)與(yu)聲能(neng)(neng)(neng)相互轉(zhuan)換的器(qi)件,稱為超(chao)(chao)聲波(bo)(bo)換能(neng)(neng)(neng)器(qi)。超(chao)(chao)聲波(bo)(bo)換能(neng)(neng)(neng)器(qi)的功能(neng)(neng)(neng)是將輸入的電功率轉(zhuan)換成機(ji)械(xie)功率(即(ji)超(chao)(chao)聲波(bo)(bo))再(zai)傳遞出去,而自身消(xiao)耗很少的一(yi)部分功率。
超聲波換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)一般有磁致伸縮換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)和(he)壓電(dian)(dian)晶體(ti)(ti)換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)兩類(lei)。1.屬于磁致伸縮的(de)(de)有鎳片換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)和(he)鐵(tie)氧體(ti)(ti)換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)。鐵(tie)氧體(ti)(ti)換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)的(de)(de)電(dian)(dian)聲轉(zhuan)(zhuan)換(huan)(huan)(huan)效(xiao)(xiao)率(lv)比較(jiao)低(di),一般使用(yong)一、二(er)年后效(xiao)(xiao)率(lv)下降(jiang),甚至(zhi)幾(ji)乎(hu)喪失電(dian)(dian)聲轉(zhuan)(zhuan)換(huan)(huan)(huan)能(neng)(neng)力。鎳片換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)的(de)(de)工藝復雜,價(jia)格昂貴(gui),所(suo)以至(zhi)今很(hen)少使用(yong)。2.其中(zhong)成熟可靠的(de)(de)是以壓電(dian)(dian)效(xiao)(xiao)應實現電(dian)(dian)能(neng)(neng)與聲能(neng)(neng)相互轉(zhuan)(zhuan)換(huan)(huan)(huan)的(de)(de)器(qi)(qi)件,稱(cheng)為壓電(dian)(dian)換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi).由材(cai)料(liao)的(de)(de)壓電(dian)(dian)效(xiao)(xiao)應將電(dian)(dian)信(xin)號轉(zhuan)(zhuan)換(huan)(huan)(huan)為機械振動。這(zhe)種換(huan)(huan)(huan)能(neng)(neng)器(qi)(qi)電(dian)(dian)聲轉(zhuan)(zhuan)換(huan)(huan)(huan)效(xiao)(xiao)率(lv)高,原(yuan)材(cai)料(liao)價(jia)格便(bian)宜,制(zhi)作方(fang)便(bian),也不容易老化。
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