{"id":58817,"date":"2023-04-22T00:45:34","date_gmt":"2023-04-22T05:45:34","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-test-an-ultrasonic-transducer\/"},"modified":"2025-01-27T06:12:24","modified_gmt":"2025-01-27T11:12:24","slug":"how-to-test-an-ultrasonic-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-test-an-ultrasonic-transducer\/","title":{"rendered":"Testov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de: Kompletn\u00ed pr\u016fvodce"},"content":{"rendered":"

Ultrazvukov\u00e9 sn\u00edma\u010de jsou kl\u00ed\u010dovou sou\u010d\u00e1st\u00ed mnoha aplikac\u00ed, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed a\u017e po pr\u016fmyslovou automatizaci. Jejich spr\u00e1vn\u00e1 funkce je kritick\u00e1 pro spolehlivost cel\u00e9ho syst\u00e9mu. Proto je d\u016fle\u017eit\u00e9 zn\u00e1t metody, jak efektivn\u011b testovat tyto sn\u00edma\u010de a ov\u011b\u0159it jejich parametry. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 postupy testov\u00e1n\u00ed ultrazvukov\u00fdch sn\u00edma\u010d\u016f.<\/p>\n

Z\u00e1kladn\u00ed vizu\u00e1ln\u00ed kontrola<\/h3>\n

P\u0159ed zah\u00e1jen\u00edm jak\u00fdchkoli elektrick\u00fdch test\u016f je nutn\u00e9 prov\u00e9st d\u016fkladnou vizu\u00e1ln\u00ed kontrolu sn\u00edma\u010de. Hledejte jak\u00e9koli zn\u00e1mky po\u0161kozen\u00ed, jako jsou praskliny v keramick\u00e9m prvku, po\u0161kozen\u00ed kabel\u00e1\u017ee nebo koroze na konektoru. Zkontrolujte tak\u00e9 \u010distotu povrchu sn\u00edma\u010de, zejm\u00e9na aktivn\u00ed plochy, kter\u00e1 p\u0159ich\u00e1z\u00ed do kontaktu s testovan\u00fdm materi\u00e1lem. P\u0159\u00edtomnost ne\u010distot m\u016f\u017ee v\u00fdrazn\u011b ovlivnit v\u00fdkon sn\u00edma\u010de.<\/p>\n

M\u011b\u0159en\u00ed frekven\u010dn\u00ed odezvy<\/h3>\n

Frekven\u010dn\u00ed odezva ultrazvukov\u00e9ho sn\u00edma\u010de definuje rozsah frekvenc\u00ed, na kter\u00fdch pracuje nejefektivn\u011bji. Tuto charakteristiku lze m\u011b\u0159it pomoc\u00ed spektr\u00e1ln\u00edho analyz\u00e1toru. Sn\u00edma\u010d je p\u0159ipojen k gener\u00e1toru sign\u00e1l\u016f, kter\u00fd vys\u00edl\u00e1 sign\u00e1ly s r\u016fzn\u00fdmi frekvencemi. Spektr\u00e1ln\u00ed analyz\u00e1tor pak m\u011b\u0159\u00ed amplitudu p\u0159ij\u00edman\u00e9ho sign\u00e1lu v z\u00e1vislosti na frekvenci. V\u00fdsledkem je graf, kter\u00fd ukazuje frekven\u010dn\u00ed odezvu sn\u00edma\u010de. Ide\u00e1ln\u011b by m\u011bl sn\u00edma\u010d vykazovat ostr\u00fd vrchol na jmenovit\u00e9 frekvenci.<\/p>\n\n\n\n\n\n\n\n\n\n\n
Frekvence (MHz)<\/th>\nAmplitudu (dB)<\/th>\n<\/tr>\n<\/thead>\n
2.0<\/td>\n-30<\/td>\n<\/tr>\n
2.2<\/td>\n-25<\/td>\n<\/tr>\n
2.4<\/td>\n-20<\/td>\n<\/tr>\n
2.5<\/td>\n-15<\/td>\n<\/tr>\n
2.6<\/td>\n-20<\/td>\n<\/tr>\n
2.8<\/td>\n-30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u011b\u0159en\u00ed akustick\u00e9ho v\u00fdkonu<\/h3>\n

Akustick\u00fd v\u00fdkon je mno\u017estv\u00ed energie, kterou sn\u00edma\u010d vyz\u00e1\u0159\u00ed ve form\u011b ultrazvuku. Jeho m\u011b\u0159en\u00ed je slo\u017eit\u011bj\u0161\u00ed a \u010dasto vy\u017eaduje specializovan\u00e9 vybaven\u00ed, jako je hydrofon. Hydrofon je um\u00edst\u011bn v definovan\u00e9 vzd\u00e1lenosti od sn\u00edma\u010de a m\u011b\u0159\u00ed akustick\u00fd tlak vyprodukovan\u00fd sn\u00edma\u010dem. Z nam\u011b\u0159en\u00e9ho akustick\u00e9ho tlaku lze pak vypo\u010d\u00edtat akustick\u00fd v\u00fdkon. M\u011b\u0159en\u00ed akustick\u00e9ho v\u00fdkonu je d\u016fle\u017eit\u00e9 pro ov\u011b\u0159en\u00ed, zda sn\u00edma\u010d spl\u0148uje deklarovan\u00e9 specifikace.<\/p>\n

Kontrola impedance<\/h3>\n

Impedance ultrazvukov\u00e9ho sn\u00edma\u010de z\u00e1vis\u00ed na jeho frekvenci a teplot\u011b. Jej\u00ed m\u011b\u0159en\u00ed se prov\u00e1d\u00ed pomoc\u00ed impedan\u010dn\u00edho analyz\u00e1toru. M\u011b\u0159en\u00ed impedance n\u00e1m pom\u00e1h\u00e1 ov\u011b\u0159it, zda je sn\u00edma\u010d elektricky v po\u0159\u00e1dku a zda jeho charakteristiky odpov\u00eddaj\u00ed specifikac\u00edm v\u00fdrobce. Odchylky od norm\u00e1ln\u00edch hodnot mohou signalizovat po\u0161kozen\u00ed sn\u00edma\u010de.<\/p>\n

Testov\u00e1n\u00ed v re\u00e1ln\u00fdch podm\u00ednk\u00e1ch<\/h3>\n

Kone\u010dn\u00fdm testem je ov\u011b\u0159en\u00ed funk\u010dnosti sn\u00edma\u010de v re\u00e1ln\u00fdch podm\u00ednk\u00e1ch. Tento test se li\u0161\u00ed v z\u00e1vislosti na aplikaci, ve kter\u00e9 se sn\u00edma\u010d pou\u017e\u00edv\u00e1. Nap\u0159\u00edklad ultrazvukov\u00fd sn\u00edma\u010d pro m\u011b\u0159en\u00ed tlou\u0161\u0165ky materi\u00e1lu by m\u011bl b\u00fdt testov\u00e1n na r\u016fzn\u00fdch materi\u00e1lech s r\u016fzn\u00fdmi tlou\u0161\u0165kami. D\u016fle\u017eit\u00e9 je porovnat nam\u011b\u0159en\u00e9 hodnoty s referen\u010dn\u00edmi hodnotami.<\/p>\n

Z\u00e1v\u011br<\/h3>\n

Testov\u00e1n\u00ed ultrazvukov\u00fdch sn\u00edma\u010d\u016f je nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed jejich spr\u00e1vn\u00e9 funkce a spolehlivosti. Kombinac\u00ed vizu\u00e1ln\u00ed kontroly s elektrick\u00fdmi a akustick\u00fdmi m\u011b\u0159en\u00edmi a testov\u00e1n\u00edm v re\u00e1ln\u00fdch podm\u00ednk\u00e1ch lze efektivn\u011b ov\u011b\u0159it parametry sn\u00edma\u010de a v\u010das odhalit p\u0159\u00edpadn\u00e9 probl\u00e9my. Spr\u00e1vn\u00e9 postupy testov\u00e1n\u00ed jsou kl\u00ed\u010dov\u00e9 pro \u00fasp\u011b\u0161n\u00e9 nasazen\u00ed ultrazvukov\u00fdch sn\u00edma\u010d\u016f v r\u016fzn\u00fdch aplikac\u00edch.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultrazvukov\u00e9 sn\u00edma\u010de jsou kl\u00ed\u010dovou sou\u010d\u00e1st\u00ed mnoha aplikac\u00ed, od l\u00e9ka\u0159sk\u00e9ho zobrazov\u00e1n\u00ed a\u017e po pr\u016fmyslovou automatizaci. Jejich spr\u00e1vn\u00e1 funkce je kritick\u00e1 pro spolehlivost cel\u00e9ho syst\u00e9mu. Proto je d\u016fle\u017eit\u00e9 zn\u00e1t metody, jak efektivn\u011b testovat tyto sn\u00edma\u010de a ov\u011b\u0159it jejich parametry. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 postupy testov\u00e1n\u00ed ultrazvukov\u00fdch sn\u00edma\u010d\u016f. Z\u00e1kladn\u00ed vizu\u00e1ln\u00ed kontrola P\u0159ed zah\u00e1jen\u00edm jak\u00fdchkoli elektrick\u00fdch test\u016f<\/p>\n","protected":false},"author":1,"featured_media":19410,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-58817","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/58817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=58817"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/58817\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19410"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=58817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=58817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=58817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}