超聲波探頭是超聲波探傷設備主要組件，主要作用是將(jiang)返回(hui)來的(de)聲波轉換成電(dian)脈沖和控制超聲波的(de)傳播(bo)方向(xiang)和能量集中的(de)程(cheng)度(du),當改變探頭入射角(jiao)或改變超聲波的(de)擴散角(jiao)時,可使聲波的(de)主要能量按(an)不同的(de)角(jiao)度(du)射入介質(zhi)內部或改變聲波的(de)指向(xiang)性,提高分(fen)辨率。

飛(fei)泰生產一種全新(xin)超聲波(bo)探(tan)傷雙晶探(tan)頭裝置，包(bao)括外(wai)殼，外(wai)殼內中(zhong)(zhong)部(bu)設(she)有絕緣隔(ge)(ge)層(ceng)(ceng)，外(wai)殼內的(de)兩個區域(yu)中(zhong)(zhong)分別設(she)有發(fa)(fa)射(she)(she)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)和(he)接(jie)(jie)收(shou)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)，發(fa)(fa)射(she)(she)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)和(he)接(jie)(jie)收(shou)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)的(de)上側均設(she)有阻(zu)尼(ni)塊(kuai)，發(fa)(fa)射(she)(she)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)和(he)接(jie)(jie)收(shou)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)分別電(dian)(dian)(dian)性連接(jie)(jie)有發(fa)(fa)射(she)(she)電(dian)(dian)(dian)纜(lan)(lan)線和(he)接(jie)(jie)收(shou)電(dian)(dian)(dian)纜(lan)(lan)線，發(fa)(fa)射(she)(she)電(dian)(dian)(dian)纜(lan)(lan)線和(he)接(jie)(jie)收(shou)電(dian)(dian)(dian)纜(lan)(lan)線均貫穿于阻(zu)尼(ni)塊(kuai)并電(dian)(dian)(dian)性連接(jie)(jie)于接(jie)(jie)頭，發(fa)(fa)射(she)(she)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)和(he)接(jie)(jie)收(shou)壓電(dian)(dian)(dian)晶片(pian)(pian)(pian)的(de)下側均設(she)有延遲塊(kuai)，延遲塊(kuai)的(de)下部(bu)設(she)有保護膜(mo)，絕緣隔(ge)(ge)層(ceng)(ceng)內部(bu)設(she)有真空(kong)層(ceng)(ceng)，外(wai)殼內其他空(kong)間設(she)有吸聲材料層(ceng)(ceng)。該能通過真空(kong)層(ceng)(ceng)的(de)設(she)置，加強雙晶超聲波(bo)探(tan)傷探(tan)頭的(de)發(fa)(fa)射(she)(she)和(he)接(jie)(jie)收(shou)之(zhi)間的(de)抗干擾性，提高了超聲波(bo)探(tan)傷探(tan)頭使用的(de)精確度。

超聲波雙晶探頭工作原理
工作時，通過(guo)(guo)發(fa)射壓(ya)(ya)(ya)電晶片(pian)12發(fa)射超(chao)聲波信號(hao)，接收(shou)壓(ya)(ya)(ya)電晶片(pian)6接收(shou)反射過(guo)(guo)來的超(chao)聲波信號(hao)，發(fa)射壓(ya)(ya)(ya)電晶片(pian)12和接收(shou)壓(ya)(ya)(ya)電晶片(pian)6由于與水平(ping)面的夾角而產(chan)生一個菱(ling)形探測區(qu)(qu)域(yu)(yu)，此區(qu)(qu)域(yu)(yu)靈敏度高，適用于工件的表面探測，其中(zhong)外(wai)殼3中(zhong)部區(qu)(qu)域(yu)(yu)設置的真空(kong)層10能夠阻擋發(fa)射壓(ya)(ya)(ya)電晶片(pian)12發(fa)射的超(chao)聲波直接進入接收(shou)壓(ya)(ya)(ya)電晶片(pian)6中(zhong)，增(zeng)強了(le)抗干擾性。