{"id":58812,"date":"2023-04-22T00:45:57","date_gmt":"2023-04-22T05:45:57","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-test-an-ultrasonic-transducer-with-a-multimeter\/"},"modified":"2025-01-27T06:12:25","modified_gmt":"2025-01-27T11:12:25","slug":"how-to-test-an-ultrasonic-transducer-with-a-multimeter","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-test-an-ultrasonic-transducer-with-a-multimeter\/","title":{"rendered":"Jak otestovat ultrazvukov\u00fd sn\u00edma\u010d multimetrem?"},"content":{"rendered":"

Ultrazvukov\u00e9 sn\u00edma\u010de jsou kl\u00ed\u010dovou sou\u010d\u00e1st\u00ed mnoha aplikac\u00ed, od pr\u016fmyslov\u00e9 automatizace po l\u00e9ka\u0159sk\u00e9 zobrazov\u00e1n\u00ed. Spr\u00e1vn\u00e9 fungov\u00e1n\u00ed t\u011bchto sn\u00edma\u010d\u016f je kritick\u00e9 pro spolehlivost cel\u00e9ho syst\u00e9mu. I kdy\u017e komplexn\u00ed testov\u00e1n\u00ed vy\u017eaduje specializovan\u00e9 vybaven\u00ed, z\u00e1kladn\u00ed ov\u011b\u0159en\u00ed stavu sn\u00edma\u010de lze prov\u00e9st pomoc\u00ed b\u011b\u017en\u00e9ho multimetru. Tento \u010dl\u00e1nek popisuje, jak to ud\u011blat.<\/p>\n

Z\u00e1kladn\u00ed kontrola kontinuity<\/h3>\n

Prvn\u00edm krokem p\u0159i testov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de multimetrem je ov\u011b\u0159en\u00ed kontinuity. To n\u00e1m \u0159ekne, zda je vnit\u0159n\u00ed obvod sn\u00edma\u010de neporu\u0161en\u00fd. V\u011bt\u0161ina ultrazvukov\u00fdch sn\u00edma\u010d\u016f m\u00e1 dva nebo v\u00edce v\u00fdvod\u016f. Nastavte multimetr na funkci m\u011b\u0159en\u00ed odporu (\u03a9) a p\u0159ipojte sondy multimetru k jednotliv\u00fdm v\u00fdvod\u016fm sn\u00edma\u010de. M\u011bli byste nam\u011b\u0159it n\u00edzkou hodnotu odporu (obvykle n\u011bkolik ohm\u016f), kter\u00e1 indikuje dobrou kontinuitu. Hodnota se m\u016f\u017ee li\u0161it v z\u00e1vislosti na typu sn\u00edma\u010de a jeho impedanci. Vysok\u00fd odpor nebo nekone\u010dn\u00fd odpor (OL) nazna\u010duje p\u0159eru\u0161en\u00fd obvod a po\u0161kozen\u00fd sn\u00edma\u010de.<\/p>\n\n\n\n\n\n\n
V\u00fdsledek m\u011b\u0159en\u00ed<\/th>\nInterpretace<\/th>\nD\u00e1le<\/th>\n<\/tr>\n<\/thead>\n
N\u00edzk\u00fd odpor (n\u011bkolik ohm\u016f)<\/td>\nDobr\u00e1 kontinuita<\/td>\nPokra\u010dujte dal\u0161\u00edm testem<\/td>\n<\/tr>\n
Vysok\u00fd odpor nebo OL<\/td>\nP\u0159eru\u0161en\u00fd obvod<\/td>\nSn\u00edma\u010d je po\u0161kozen\u00fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u011b\u0159en\u00ed kapacity<\/h3>\n

N\u011bkter\u00e9 ultrazvukov\u00e9 sn\u00edma\u010de obsahuj\u00ed piezoelektrick\u00fd prvek, kter\u00fd m\u00e1 ur\u010ditou kapacitu. Tuto kapacitu lze zm\u011b\u0159it multimetrem nastaven\u00fdm na funkci m\u011b\u0159en\u00ed kapacity (uF nebo pF). Hodnota kapacity se bude li\u0161it v z\u00e1vislosti na typu a velikosti sn\u00edma\u010de. Porovnejte nam\u011b\u0159enou hodnotu s \u00fadaji v\u00fdrobce, pokud jsou k dispozici. V\u00fdrazn\u00e1 odchylka od o\u010dek\u00e1van\u00e9 hodnoty m\u016f\u017ee indikovat po\u0161kozen\u00ed sn\u00edma\u010de. Tento test nen\u00ed v\u017edy provediteln\u00fd, jeliko\u017e ne v\u0161echny multimetry maj\u00ed funkci m\u011b\u0159en\u00ed kapacity a ne v\u0161echny sn\u00edma\u010de maj\u00ed m\u011b\u0159itelnou kapacitu na v\u00fdvodech.<\/p>\n

Kontrola dielektrick\u00e9 pevnosti (pouze pro zku\u0161en\u00e9 techniky)<\/h3>\n

Tento test by m\u011bl prov\u00e1d\u011bt pouze zku\u0161en\u00fd technik s pat\u0159i\u010dn\u00fdmi bezpe\u010dnostn\u00edmi opat\u0159en\u00edmi. Tento test ov\u011b\u0159uje izola\u010dn\u00ed vlastnosti sn\u00edma\u010de. Vy\u017eaduje pou\u017eit\u00ed vysokonap\u011b\u0165ov\u00e9ho zdroje a je vysoce rizikov\u00fd. Nespr\u00e1vn\u00e9 proveden\u00ed m\u016f\u017ee v\u00e9st k po\u0161kozen\u00ed sn\u00edma\u010de a ohro\u017een\u00ed bezpe\u010dnosti. Tento test se nedoporu\u010duje pro b\u011b\u017en\u00e9 u\u017eivatele.<\/p>\n

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

Multimetr umo\u017e\u0148uje z\u00e1kladn\u00ed ov\u011b\u0159en\u00ed stavu ultrazvukov\u00e9ho sn\u00edma\u010de. Kontrola kontinuity a p\u0159\u00edpadn\u011b m\u011b\u0159en\u00ed kapacity poskytuj\u00ed cenn\u00e9 informace o jeho funk\u010dnosti. Nicm\u00e9n\u011b, komplexn\u011bj\u0161\u00ed testov\u00e1n\u00ed vy\u017eaduje specializovan\u00e9 vybaven\u00ed a znalosti. Pokud multimetr indikuje z\u00e1vadu, je nutn\u00e9 sn\u00edma\u010d nahradit. V\u017edy je d\u016fle\u017eit\u00e9 dodr\u017eovat bezpe\u010dnostn\u00ed opat\u0159en\u00ed p\u0159i pr\u00e1ci s elektrick\u00fdmi za\u0159\u00edzen\u00edmi.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ultrazvukov\u00e9 sn\u00edma\u010de jsou kl\u00ed\u010dovou sou\u010d\u00e1st\u00ed mnoha aplikac\u00ed, od pr\u016fmyslov\u00e9 automatizace po l\u00e9ka\u0159sk\u00e9 zobrazov\u00e1n\u00ed. Spr\u00e1vn\u00e9 fungov\u00e1n\u00ed t\u011bchto sn\u00edma\u010d\u016f je kritick\u00e9 pro spolehlivost cel\u00e9ho syst\u00e9mu. I kdy\u017e komplexn\u00ed testov\u00e1n\u00ed vy\u017eaduje specializovan\u00e9 vybaven\u00ed, z\u00e1kladn\u00ed ov\u011b\u0159en\u00ed stavu sn\u00edma\u010de lze prov\u00e9st pomoc\u00ed b\u011b\u017en\u00e9ho multimetru. Tento \u010dl\u00e1nek popisuje, jak to ud\u011blat. Z\u00e1kladn\u00ed kontrola kontinuity Prvn\u00edm krokem p\u0159i testov\u00e1n\u00ed ultrazvukov\u00e9ho sn\u00edma\u010de multimetrem<\/p>\n","protected":false},"author":1,"featured_media":19414,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-58812","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\/58812","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=58812"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/58812\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/19414"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=58812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=58812"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=58812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}