{"id":62796,"date":"2022-09-26T12:45:43","date_gmt":"2022-09-26T17:45:43","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/is-there-any-truth-to-piezoceramic-sheet-picking-up-vibrations-in-machinery\/"},"modified":"2025-01-27T06:14:40","modified_gmt":"2025-01-27T11:14:40","slug":"is-there-any-truth-to-piezoceramic-sheet-picking-up-vibrations-in-machinery","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/is-there-any-truth-to-piezoceramic-sheet-picking-up-vibrations-in-machinery\/","title":{"rendered":"Piezokrystalick\u00e9 folie a vibrace stroj\u016f: Fakta?"},"content":{"rendered":"

Piezokrystalick\u00e9 vrstvy nach\u00e1zej\u00ed st\u00e1le \u0161ir\u0161\u00ed uplatn\u011bn\u00ed v oblasti monitorov\u00e1n\u00ed vibrac\u00ed v stroj\u00edch. Ot\u00e1zka, zda skute\u010dn\u011b efektivn\u011b zachycuj\u00ed vibrace a poskytuj\u00ed spolehliv\u00e9 informace o stavu stroje, si v\u0161ak zaslou\u017e\u00ed podrobn\u011bj\u0161\u00ed prozkoum\u00e1n\u00ed.<\/p>\n

Princip funkce piezokrystalick\u00fdch vrstev<\/p>\n

Piezokrystalick\u00e9 materi\u00e1ly, jako je nap\u0159\u00edklad titan\u00e1t barnat\u00fd (BaTiO\u2083) nebo zirkon\u00e1t olovnat\u00fd titan\u00e1t (PZT), vykazuj\u00ed piezoelektrick\u00fd efekt. To znamen\u00e1, \u017ee se p\u0159i mechanick\u00e9m nam\u00e1h\u00e1n\u00ed, v na\u0161em p\u0159\u00edpad\u011b vibracemi, na jejich povrchu indukuje elektrick\u00fd n\u00e1boj. Intenzita tohoto n\u00e1boje je p\u0159\u00edmo \u00fam\u011brn\u00e1 intenzit\u011b vibrace. Tato vlastnost je z\u00e1kladem jejich vyu\u017eit\u00ed jako senzor\u016f vibrac\u00ed. Piezokrystalick\u00e1 vrstva p\u0159em\u011bn\u00ed mechanickou energii vibrac\u00ed na elektrick\u00fd sign\u00e1l, kter\u00fd m\u016f\u017ee b\u00fdt n\u00e1sledn\u011b zes\u00edlen a zpracov\u00e1n elektronick\u00fdm syst\u00e9mem. Citlivost a frekven\u010dn\u00ed rozsah z\u00e1vis\u00ed na materi\u00e1lu, tlou\u0161\u0165ce a geometrii vrstvy.<\/p>\n

Faktory ovliv\u0148uj\u00edc\u00ed p\u0159esnost m\u011b\u0159en\u00ed<\/p>\n

P\u0159esnost m\u011b\u0159en\u00ed vibrac\u00ed pomoc\u00ed piezokrystalick\u00fdch vrstev je ovlivn\u011bna n\u011bkolika faktory. Jedn\u00edm z kl\u00ed\u010dov\u00fdch faktor\u016f je spr\u00e1vn\u00e1 instalace a upevn\u011bn\u00ed vrstvy na monitorovanou plochu. Nespr\u00e1vn\u00e9 upevn\u011bn\u00ed m\u016f\u017ee v\u00e9st k chybn\u00fdm m\u011b\u0159en\u00edm, a to bu\u010f kv\u016fli sn\u00ed\u017een\u00e9 p\u0159enosov\u00e9 \u00fa\u010dinnosti vibrac\u00ed na vrstvu, nebo v d\u016fsledku vzniku parazitn\u00edch vibrac\u00ed. D\u00e1le je d\u016fle\u017eit\u00e9 zohlednit teplotn\u00ed vlivy, jeliko\u017e piezoelektrick\u00e9 vlastnosti materi\u00e1lu se s teplotou m\u011bn\u00ed. Vliv okol\u00ed, jako jsou elektromagnetick\u00e9 ru\u0161en\u00ed a vn\u011bj\u0161\u00ed mechanick\u00e9 s\u00edly, m\u016f\u017ee tak\u00e9 ovlivnit p\u0159esnost m\u011b\u0159en\u00ed.<\/p>\n

Porovn\u00e1n\u00ed s jin\u00fdmi metodami m\u011b\u0159en\u00ed vibrac\u00ed<\/p>\n

Piezokrystalick\u00e9 vrstvy p\u0159edstavuj\u00ed jednu z mnoha metod m\u011b\u0159en\u00ed vibrac\u00ed v stroj\u00edch. Existuj\u00ed i jin\u00e9 technologie, jako jsou nap\u0159\u00edklad akcelerometry, sn\u00edma\u010de rychlosti a laserov\u00e9 vibrometry. N\u00e1sleduj\u00edc\u00ed tabulka porovn\u00e1v\u00e1 n\u011bkter\u00e9 kl\u00ed\u010dov\u00e9 vlastnosti t\u011bchto metod:<\/p>\n\n\n\n\n\n\n\n\n
Metoda<\/th>\nCitlivost<\/th>\nFrekven\u010dn\u00ed rozsah<\/th>\nCena<\/th>\nRobustnost<\/th>\n<\/tr>\n<\/thead>\n
Piezokrystalick\u00e1 vrstva<\/td>\nSt\u0159edn\u00ed<\/td>\n\u0160irok\u00fd<\/td>\nN\u00edzk\u00e1 a\u017e st\u0159edn\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\n<\/tr>\n
Akcelerometr<\/td>\nVysok\u00e1<\/td>\n\u0160irok\u00fd<\/td>\nSt\u0159edn\u00ed<\/td>\nVysok\u00e1<\/td>\n<\/tr>\n
Sn\u00edma\u010d rychlosti<\/td>\nSt\u0159edn\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\nSt\u0159edn\u00ed<\/td>\n<\/tr>\n
Laserov\u00fd vibrometr<\/td>\nVysok\u00e1<\/td>\nVelmi \u0161irok\u00fd<\/td>\nVysok\u00e1<\/td>\nN\u00edzk\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Aplikace v praxi<\/p>\n

Piezokrystalick\u00e9 vrstvy se \u00fasp\u011b\u0161n\u011b pou\u017e\u00edvaj\u00ed k monitorov\u00e1n\u00ed vibrac\u00ed v r\u016fzn\u00fdch typech stroj\u016f, nap\u0159\u00edklad v motorech, \u010derpadlech, turb\u00ednach a obr\u00e1b\u011bc\u00edch stroj\u00edch. Umo\u017e\u0148uj\u00ed v\u010dasnou detekci poruch, jako jsou nerovnov\u00e1hy rotor\u016f, lo\u017eiskov\u00e1 po\u0161kozen\u00ed a praskliny. D\u00edky sv\u00e9 tenk\u00e9 a flexibiln\u00ed form\u011b se snadno montuj\u00ed na r\u016fzn\u00e9 povrchy, co\u017e roz\u0161i\u0159uje jejich aplika\u010dn\u00ed mo\u017enosti. V n\u011bkter\u00fdch p\u0159\u00edpadech se kombinuj\u00ed s dal\u0161\u00edmi senzory pro komplexn\u00ed monitoring stavu stroje.<\/p>\n

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

Piezokrystalick\u00e9 vrstvy p\u0159edstavuj\u00ed efektivn\u00ed a relativn\u011b levn\u00e9 \u0159e\u0161en\u00ed pro detekci vibrac\u00ed v stroj\u00edch. I kdy\u017e jejich p\u0159esnost je ovlivn\u011bna \u0159adou faktor\u016f, spr\u00e1vn\u00e1 instalace, kalibrace a zohledn\u011bn\u00ed vliv\u016f prost\u0159ed\u00ed umo\u017e\u0148uj\u00ed z\u00edskat spolehliv\u00e9 informace o stavu stroje a p\u0159isp\u00edvaj\u00ed k preventivn\u00ed \u00fadr\u017eb\u011b a zv\u00fd\u0161en\u00ed spolehlivosti. Jejich pou\u017eit\u00ed je v praxi st\u00e1le roz\u0161\u00ed\u0159en\u011bj\u0161\u00ed a s rozvojem technologi\u00ed se d\u00e1le zvy\u0161uje jejich p\u0159esnost a spolehlivost.<\/p>\n","protected":false},"excerpt":{"rendered":"

Piezokrystalick\u00e9 vrstvy nach\u00e1zej\u00ed st\u00e1le \u0161ir\u0161\u00ed uplatn\u011bn\u00ed v oblasti monitorov\u00e1n\u00ed vibrac\u00ed v stroj\u00edch. Ot\u00e1zka, zda skute\u010dn\u011b efektivn\u011b zachycuj\u00ed vibrace a poskytuj\u00ed spolehliv\u00e9 informace o stavu stroje, si v\u0161ak zaslou\u017e\u00ed podrobn\u011bj\u0161\u00ed prozkoum\u00e1n\u00ed. Princip funkce piezokrystalick\u00fdch vrstev Piezokrystalick\u00e9 materi\u00e1ly, jako je nap\u0159\u00edklad titan\u00e1t barnat\u00fd (BaTiO\u2083) nebo zirkon\u00e1t olovnat\u00fd titan\u00e1t (PZT), vykazuj\u00ed piezoelektrick\u00fd efekt. To znamen\u00e1, \u017ee se p\u0159i<\/p>\n","protected":false},"author":1,"featured_media":560,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62796","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\/62796","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=62796"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62796\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/560"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62796"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62796"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62796"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}