{"id":60831,"date":"2023-04-21T15:13:50","date_gmt":"2023-04-21T20:13:50","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-check-piezoelectric-sensor\/"},"modified":"2025-01-27T06:06:59","modified_gmt":"2025-01-27T11:06:59","slug":"how-to-check-piezoelectric-sensor","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-to-check-piezoelectric-sensor\/","title":{"rendered":"Kompletn\u00ed pr\u016fvodce testov\u00e1n\u00edm piezoelektrick\u00fdch senzor\u016f"},"content":{"rendered":"<p>Piezoelektrick\u00e9 senzory jsou v\u0161udyp\u0159\u00edtomn\u00e9 sou\u010d\u00e1stky, nach\u00e1zej\u00edc\u00ed uplatn\u011bn\u00ed v \u0161irok\u00e9 \u0161k\u00e1le aplikac\u00ed, od automobilov\u00e9ho pr\u016fmyslu p\u0159es medic\u00ednu a\u017e po spot\u0159ebn\u00ed elektroniku.  Spr\u00e1vn\u00e9 ov\u011b\u0159en\u00ed jejich funk\u010dnosti je proto kl\u00ed\u010dov\u00e9 pro zaji\u0161t\u011bn\u00ed spolehlivosti cel\u00e9ho syst\u00e9mu.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na praktick\u00e9 postupy, jak ov\u011b\u0159it funk\u010dnost piezoelektrick\u00e9ho senzoru.<\/p>\n<h3>Vizu\u00e1ln\u00ed kontrola a z\u00e1kladn\u00ed test kontinuity<\/h3>\n<p>Prvn\u00edm krokem p\u0159i kontrole piezoelektrick\u00e9ho senzoru je d\u016fkladn\u00e1 vizu\u00e1ln\u00ed inspekce.  Hledejte jak\u00e9koli viditeln\u00e9 po\u0161kozen\u00ed, jako jsou praskliny, zlomy, stopy po p\u0159eh\u0159\u00e1t\u00ed nebo ne\u010distoty na povrchu.  Uvoln\u011bn\u00e9 kontakty nebo po\u0161kozen\u00e1 kabel\u00e1\u017e mohou rovn\u011b\u017e v\u00e9st k nespr\u00e1vn\u00e9 funkci.  Po vizu\u00e1ln\u00ed kontrole prove\u010fte jednoduch\u00fd test kontinuity pomoc\u00ed multimetru.  Nastavte multimetr na m\u011b\u0159en\u00ed odporu a p\u0159ipojte sondy k v\u00fdvod\u016fm senzoru.  Pokud je senzor neporu\u0161en\u00fd, m\u011bl by multimetr uk\u00e1zat nekone\u010dn\u00fd odpor (nebo velmi vysokou hodnotu).  Nulov\u00fd odpor indikuje zkrat, zat\u00edmco p\u0159eru\u0161en\u00fd obvod se projev\u00ed jako nekone\u010dn\u00fd odpor.<\/p>\n<h3>M\u011b\u0159en\u00ed piezoelektrick\u00e9ho efektu<\/h3>\n<p>Kl\u00ed\u010dovou charakteristikou piezoelektrick\u00e9ho senzoru je jeho schopnost generovat elektrick\u00fd n\u00e1boj v reakci na mechanick\u00e9 nam\u00e1h\u00e1n\u00ed (tlak, vibrace).  K ov\u011b\u0159en\u00ed t\u00e9to funkce je zapot\u0159eb\u00ed speci\u00e1ln\u00edho vybaven\u00ed, kter\u00e9 z\u00e1vis\u00ed na typu senzoru a po\u017eadovan\u00e9 p\u0159esnosti m\u011b\u0159en\u00ed.  Pro z\u00e1kladn\u00ed testov\u00e1n\u00ed lze pou\u017e\u00edt osciloskop.  Mechanicky stimulujte senzor (nap\u0159. jemn\u00fdm poklep\u00e1n\u00edm nebo stla\u010den\u00edm) a sledujte na osciloskopu generovan\u00fd sign\u00e1l.  M\u011bl by se objevit kr\u00e1tk\u00fd pulz nap\u011bt\u00ed, jeho\u017e amplituda a tvar z\u00e1vis\u00ed na vlastnostech senzoru a s\u00edle mechanick\u00e9 stimulace.<\/p>\n<h3>Kalibrace a porovn\u00e1n\u00ed s referen\u010dn\u00ed hodnotou<\/h3>\n<p>Pro p\u0159esn\u011bj\u0161\u00ed m\u011b\u0159en\u00ed a ov\u011b\u0159en\u00ed linearity senzoru je nutn\u00e1 kalibrace.  Tato procedura se li\u0161\u00ed v z\u00e1vislosti na typu senzoru a po\u017eadovan\u00e9 p\u0159esnosti.  M\u016f\u017ee zahrnovat pou\u017eit\u00ed kalibra\u010dn\u00edho za\u0159\u00edzen\u00ed, kter\u00e9 generuje zn\u00e1m\u00e9 mechanick\u00e9 s\u00edly nebo vibrace, a porovn\u00e1n\u00ed nam\u011b\u0159en\u00fdch hodnot s referen\u010dn\u00ed k\u0159ivkou.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Typ stimulace<\/th>\n<th>O\u010dek\u00e1van\u00e1 odezva (nap\u0159. v mV)<\/th>\n<th>Pozn\u00e1mka<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Jemn\u00e9 poklep\u00e1n\u00ed<\/td>\n<td>10-50<\/td>\n<td>Hodnoty z\u00e1vis\u00ed na typu senzoru<\/td>\n<\/tr>\n<tr>\n<td>St\u0159edn\u00ed tlak<\/td>\n<td>50-200<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Siln\u00fd tlak<\/td>\n<td>200-500<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Anal\u00fdza sign\u00e1lu a identifikace chyb<\/h3>\n<p>Anal\u00fdza sign\u00e1lu generovan\u00e9ho piezoelektrick\u00fdm senzorem m\u016f\u017ee odhalit r\u016fzn\u00e9 chyby.  Nap\u0159\u00edklad n\u00edzk\u00e1 amplituda sign\u00e1lu m\u016f\u017ee indikovat po\u0161kozen\u00ed senzoru, \u0161patn\u00fd kontakt nebo nedostate\u010dnou citlivost.  Zkreslen\u00fd tvar sign\u00e1lu m\u016f\u017ee nazna\u010dovat probl\u00e9my s mechanickou integritou senzoru nebo vn\u011bj\u0161\u00ed ru\u0161en\u00ed.  P\u0159i anal\u00fdze sign\u00e1lu je d\u016fle\u017eit\u00e9 zohlednit okoln\u00ed podm\u00ednky, kter\u00e9 mohou ovlivnit m\u011b\u0159en\u00ed.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee kontrola funk\u010dnosti piezoelektrick\u00e9ho senzoru vy\u017eaduje komplexn\u00ed p\u0159\u00edstup zahrnuj\u00edc\u00ed vizu\u00e1ln\u00ed inspekci, m\u011b\u0159en\u00ed kontinuity, testov\u00e1n\u00ed piezoelektrick\u00e9ho efektu a p\u0159\u00edpadn\u011b kalibraci.  Spr\u00e1vn\u00e9 proveden\u00ed t\u011bchto krok\u016f zajist\u00ed spolehlivou funkci senzoru a minimalizuje riziko chyb v m\u011b\u0159en\u00edch.  V p\u0159\u00edpad\u011b pot\u0159eby je vhodn\u00e9 konzultovat dokumentaci v\u00fdrobce.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piezoelektrick\u00e9 senzory jsou v\u0161udyp\u0159\u00edtomn\u00e9 sou\u010d\u00e1stky, nach\u00e1zej\u00edc\u00ed uplatn\u011bn\u00ed v \u0161irok\u00e9 \u0161k\u00e1le aplikac\u00ed, od automobilov\u00e9ho pr\u016fmyslu p\u0159es medic\u00ednu a\u017e po spot\u0159ebn\u00ed elektroniku. Spr\u00e1vn\u00e9 ov\u011b\u0159en\u00ed jejich funk\u010dnosti je proto kl\u00ed\u010dov\u00e9 pro zaji\u0161t\u011bn\u00ed spolehlivosti cel\u00e9ho syst\u00e9mu. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na praktick\u00e9 postupy, jak ov\u011b\u0159it funk\u010dnost piezoelektrick\u00e9ho senzoru. Vizu\u00e1ln\u00ed kontrola a z\u00e1kladn\u00ed test kontinuity Prvn\u00edm krokem p\u0159i kontrole piezoelektrick\u00e9ho<\/p>\n","protected":false},"author":1,"featured_media":26464,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-60831","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\/60831","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=60831"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/60831\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/26464"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=60831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=60831"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=60831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}