{"id":58806,"date":"2023-04-22T00:46:30","date_gmt":"2023-04-22T05:46:30","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-test-piezoelectric-transducer\/"},"modified":"2025-01-27T06:12:25","modified_gmt":"2025-01-27T11:12:25","slug":"how-to-test-piezoelectric-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-test-piezoelectric-transducer\/","title":{"rendered":"Kompletn\u00ed pr\u016fvodce testov\u00e1n\u00edm piezoelektrick\u00fdch sn\u00edma\u010d\u016f"},"content":{"rendered":"<p>Piezoelektrick\u00e9 sn\u00edma\u010de jsou d\u016fle\u017eitou sou\u010d\u00e1st\u00ed mnoha aplikac\u00ed, od ultrazvukov\u00fdch \u010didel po senzory tlaku. Jejich spr\u00e1vn\u00e1 funk\u010dnost je kritick\u00e1 pro spolehlivost cel\u00e9ho syst\u00e9mu.  Testov\u00e1n\u00ed t\u011bchto sn\u00edma\u010d\u016f proto vy\u017eaduje pe\u010dliv\u00fd p\u0159\u00edstup a pochopen\u00ed jejich specifick\u00fdch vlastnost\u00ed.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody testov\u00e1n\u00ed piezoelektrick\u00fdch sn\u00edma\u010d\u016f a poskytne praktick\u00e9 rady pro jejich efektivn\u00ed ov\u011b\u0159en\u00ed.<\/p>\n<p>M\u011b\u0159en\u00ed piezoelektrick\u00e9ho n\u00e1boje<\/p>\n<p>Z\u00e1kladn\u00ed vlastnost\u00ed piezoelektrick\u00e9ho sn\u00edma\u010de je jeho schopnost generovat elektrick\u00fd n\u00e1boj v reakci na mechanick\u00e9 nam\u00e1h\u00e1n\u00ed.  Tato vlastnost se m\u011b\u0159\u00ed pomoc\u00ed elektrometru, vysoce citliv\u00e9ho p\u0159\u00edstroje schopn\u00e9ho detekovat i velmi mal\u00e9 elektrick\u00e9 n\u00e1boje.  Sn\u00edma\u010d je vystaven zn\u00e1m\u00e9 mechanick\u00e9 s\u00edle (nap\u0159. pomoc\u00ed kalibrovan\u00e9 z\u00e1t\u011b\u017ee) a elektrometr m\u011b\u0159\u00ed generovan\u00fd n\u00e1boj.  V\u00fdsledky se pak porovn\u00e1vaj\u00ed se specifikacemi v\u00fdrobce.  D\u016fle\u017eit\u00e9 je zajistit stabiln\u00ed a opakovateln\u00e9 podm\u00ednky m\u011b\u0159en\u00ed, v\u010detn\u011b teploty a vlhkosti prost\u0159ed\u00ed.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Velikost s\u00edly (N)<\/th>\n<th>Nam\u011b\u0159en\u00fd n\u00e1boj (pC)<\/th>\n<th>Odchylka (%)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>100<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>202<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>300<\/td>\n<td>0<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>401<\/td>\n<td>0.25<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>503<\/td>\n<td>0.6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Frekven\u010dn\u00ed odezva<\/p>\n<p>Piezoelektrick\u00e9 sn\u00edma\u010de maj\u00ed charakteristickou frekven\u010dn\u00ed odezvu, kter\u00e1 ur\u010duje, jak dob\u0159e reaguj\u00ed na mechanick\u00e9 vibrace r\u016fzn\u00fdch frekvenc\u00ed.  Tato odezva se m\u011b\u0159\u00ed pomoc\u00ed gener\u00e1toru sign\u00e1l\u016f a analyz\u00e1toru spektra.  Sn\u00edma\u010d je vystaven sinusov\u00fdm vln\u00e1m r\u016fzn\u00fdch frekvenc\u00ed a amplitud a analyz\u00e1tor spektra m\u011b\u0159\u00ed amplitudu v\u00fdstupn\u00edho sign\u00e1lu.  Graf frekven\u010dn\u00ed odezvy pak ukazuje citlivost sn\u00edma\u010de na r\u016fzn\u00fdch frekvenc\u00edch.  Je d\u016fle\u017eit\u00e9 identifikovat rezonan\u010dn\u00ed frekvenci sn\u00edma\u010de a ov\u011b\u0159it, zda je v souladu s deklarovan\u00fdmi hodnotami.  U ultrazvukov\u00fdch aplikac\u00ed, nap\u0159\u00edklad s vyu\u017eit\u00edm za\u0159\u00edzen\u00ed od firmy Beijing Ultrasonic, je p\u0159esn\u00e9 ur\u010den\u00ed rezonan\u010dn\u00ed frekvence kl\u00ed\u010dov\u00e9 pro optim\u00e1ln\u00ed funkci.<\/p>\n<p>M\u011b\u0159en\u00ed impedance<\/p>\n<p>Impedance piezoelektrick\u00e9ho sn\u00edma\u010de je m\u011b\u0159\u00edtkem jeho odporu proti pr\u016fchodu st\u0159\u00eddav\u00e9ho proudu.  M\u011b\u0159en\u00ed impedance se prov\u00e1d\u00ed pomoc\u00ed impedan\u010dn\u00edho analyz\u00e1toru v \u0161irok\u00e9m frekven\u010dn\u00edm rozsahu.  V\u00fdsledky umo\u017e\u0148uj\u00ed identifikaci parazitn\u00edch kapacit a induk\u010dnost\u00ed, kter\u00e9 mohou ovlivnit p\u0159esnost m\u011b\u0159en\u00ed.  Porovn\u00e1n\u00ed nam\u011b\u0159en\u00fdch hodnot s \u00fadaji v\u00fdrobce pom\u00e1h\u00e1 ov\u011b\u0159it integritu sn\u00edma\u010de.<\/p>\n<p>Testy odolnosti a spolehlivosti<\/p>\n<p>Krom\u011b m\u011b\u0159en\u00ed elektrick\u00fdch vlastnost\u00ed je d\u016fle\u017eit\u00e9 ov\u011b\u0159it i mechanickou a environment\u00e1ln\u00ed odolnost piezoelektrick\u00e9ho sn\u00edma\u010de.  To zahrnuje testy na mechanick\u00e9 nam\u00e1h\u00e1n\u00ed (nap\u0159. vibrace, n\u00e1razy), teplotn\u00ed \u0161oky a vlhkost.  Tyto testy pomohou ur\u010dit \u017eivotnost a spolehlivost sn\u00edma\u010de v dan\u00e9 aplikaci.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee testov\u00e1n\u00ed piezoelektrick\u00fdch sn\u00edma\u010d\u016f vy\u017eaduje komplexn\u00ed p\u0159\u00edstup zahrnuj\u00edc\u00ed m\u011b\u0159en\u00ed r\u016fzn\u00fdch elektrick\u00fdch a mechanick\u00fdch vlastnost\u00ed.  Pou\u017eit\u00ed spr\u00e1vn\u00e9 metodiky a vybaven\u00ed je kl\u00ed\u010dov\u00e9 pro zaji\u0161t\u011bn\u00ed p\u0159esn\u00fdch a spolehliv\u00fdch v\u00fdsledk\u016f, kter\u00e9 pomohou ov\u011b\u0159it funk\u010dnost sn\u00edma\u010de a zajistit jeho optim\u00e1ln\u00ed v\u00fdkon v dan\u00e9 aplikaci.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piezoelektrick\u00e9 sn\u00edma\u010de jsou d\u016fle\u017eitou sou\u010d\u00e1st\u00ed mnoha aplikac\u00ed, od ultrazvukov\u00fdch \u010didel po senzory tlaku. Jejich spr\u00e1vn\u00e1 funk\u010dnost je kritick\u00e1 pro spolehlivost cel\u00e9ho syst\u00e9mu. Testov\u00e1n\u00ed t\u011bchto sn\u00edma\u010d\u016f proto vy\u017eaduje pe\u010dliv\u00fd p\u0159\u00edstup a pochopen\u00ed jejich specifick\u00fdch vlastnost\u00ed. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na r\u016fzn\u00e9 metody testov\u00e1n\u00ed piezoelektrick\u00fdch sn\u00edma\u010d\u016f a poskytne praktick\u00e9 rady pro jejich efektivn\u00ed ov\u011b\u0159en\u00ed. M\u011b\u0159en\u00ed piezoelektrick\u00e9ho n\u00e1boje<\/p>\n","protected":false},"author":1,"featured_media":19418,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-58806","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\/58806","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=58806"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/58806\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19418"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=58806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=58806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=58806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}