{"id":62941,"date":"2022-09-06T19:53:54","date_gmt":"2022-09-07T00:53:54","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/is-there-any-truth-to-piezo-transducers-being-used-as-static-and-dynamic-force-sensors\/"},"modified":"2025-01-27T06:14:39","modified_gmt":"2025-01-27T11:14:39","slug":"is-there-any-truth-to-piezo-transducers-being-used-as-static-and-dynamic-force-sensors","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/is-there-any-truth-to-piezo-transducers-being-used-as-static-and-dynamic-force-sensors\/","title":{"rendered":"Piezoelektrick\u00e9 sn\u00edma\u010de: Statick\u00e1 a dynamick\u00e1 s\u00edla?"},"content":{"rendered":"

Piezoelektrick\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech m\u011b\u0159en\u00ed, a ot\u00e1zka jejich vyu\u017eit\u00ed pro statick\u00e9 i dynamick\u00e9 m\u011b\u0159en\u00ed sil je proto velice relevantn\u00ed. Jejich princip fungov\u00e1n\u00ed, zalo\u017een\u00fd na vzniku elektrick\u00e9ho n\u00e1boje v reakci na mechanick\u00e9 nam\u00e1h\u00e1n\u00ed, nab\u00edz\u00ed potenci\u00e1l pro p\u0159esn\u00e9 a citliv\u00e9 m\u011b\u0159en\u00ed sil v \u0161irok\u00e9m spektru aplikac\u00ed. Nicm\u00e9n\u011b, existuj\u00ed ur\u010dit\u00e9 limity a specifika, kter\u00e9 je nutn\u00e9 vz\u00edt v \u00favahu p\u0159i jejich implementaci.<\/p>\n

Statick\u00e9 m\u011b\u0159en\u00ed sil pomoc\u00ed piezoelektrick\u00fdch sn\u00edma\u010d\u016f<\/h3>\n

Piezoelektrick\u00e9 sn\u00edma\u010de se tradi\u010dn\u011b v\u00edce asociuj\u00ed s m\u011b\u0159en\u00edm dynamick\u00fdch sil, nicm\u00e9n\u011b i pro statick\u00e9 m\u011b\u0159en\u00ed nach\u00e1zej\u00ed uplatn\u011bn\u00ed. Jejich pou\u017eit\u00ed v t\u00e9to oblasti je v\u0161ak podm\u00edn\u011bno specifick\u00fdmi faktory. Hlavn\u00edm probl\u00e9mem je tzv. "piezoelektrick\u00fd efekt relaxace" – n\u00e1boj generovan\u00fd piezoelektrick\u00fdm materi\u00e1lem se s \u010dasem pomalu rozptyluje. To vede k pomal\u00e9mu poklesu sign\u00e1lu, a proto je nutn\u00e9 pou\u017e\u00edt speci\u00e1ln\u00ed techniky pro kompenzaci tohoto jevu. Tyto techniky zahrnuj\u00ed nap\u0159\u00edklad pou\u017eit\u00ed opera\u010dn\u00edch zesilova\u010d\u016f s vysokou vstupn\u00ed impedanc\u00ed, speci\u00e1ln\u00ed kompenza\u010dn\u00ed obvody a kalibraci. P\u0159esnost m\u011b\u0159en\u00ed statick\u00fdch sil piezoelektrick\u00fdmi sn\u00edma\u010di je tedy ni\u017e\u0161\u00ed ne\u017e u dynamick\u00fdch sil a z\u00e1vis\u00ed siln\u011b na pou\u017eit\u00e9 technologii a kompenza\u010dn\u00edch metod\u00e1ch.<\/p>\n

Dynamick\u00e9 m\u011b\u0159en\u00ed sil pomoc\u00ed piezoelektrick\u00fdch sn\u00edma\u010d\u016f<\/h3>\n

V oblasti dynamick\u00fdch sil se piezoelektrick\u00e9 sn\u00edma\u010de vyzna\u010duj\u00ed vysokou citlivost\u00ed a rychlou odezvou. Jsou ide\u00e1ln\u00ed pro m\u011b\u0159en\u00ed rychle se m\u011bn\u00edc\u00edch sil, jako jsou nap\u0159\u00edklad n\u00e1razy, vibrace nebo r\u00e1zy. Jejich \u0161irok\u00e1 frekven\u010dn\u00ed odezva jim umo\u017e\u0148uje detekovat i velmi vysokofrekven\u010dn\u00ed jevy. V\u00fdsledkem je p\u0159esn\u00e9 a rychl\u00e9 m\u011b\u0159en\u00ed s minim\u00e1ln\u00edm zpo\u017ed\u011bn\u00edm. To je kl\u00ed\u010dov\u00e9 v aplikac\u00edch, kde je d\u016fle\u017eit\u00e9 zachytit i drobn\u00e9 detaily \u010dasov\u00e9ho pr\u016fb\u011bhu s\u00edly.<\/p>\n

Srovn\u00e1n\u00ed statick\u00e9ho a dynamick\u00e9ho m\u011b\u0159en\u00ed<\/h3>\n\n\n\n\n\n\n\n\n
Charakteristika<\/th>\nStatick\u00e9 m\u011b\u0159en\u00ed<\/th>\nDynamick\u00e9 m\u011b\u0159en\u00ed<\/th>\n<\/tr>\n<\/thead>\n
P\u0159esnost<\/td>\nNi\u017e\u0161\u00ed, ovlivn\u011bna relaxac\u00ed piezoelektrick\u00e9ho efektu<\/td>\nVy\u0161\u0161\u00ed, rychl\u00e1 odezva<\/td>\n<\/tr>\n
Rychlost odezvy<\/td>\nPomal\u00e1<\/td>\nVelmi rychl\u00e1<\/td>\n<\/tr>\n
Typick\u00e9 aplikace<\/td>\nM\u011b\u0159en\u00ed konstantn\u00edho zat\u00ed\u017een\u00ed, kalibrace<\/td>\nM\u011b\u0159en\u00ed n\u00e1raz\u016f, vibrac\u00ed, r\u00e1zov\u00fdch sil<\/td>\n<\/tr>\n
Kompenza\u010dn\u00ed techniky<\/td>\nNutn\u00e9 pro dosa\u017een\u00ed p\u0159ijateln\u00e9 p\u0159esnosti<\/td>\nM\u00e9n\u011b kritick\u00e9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Faktory ovliv\u0148uj\u00edc\u00ed p\u0159esnost m\u011b\u0159en\u00ed<\/h3>\n

P\u0159esnost m\u011b\u0159en\u00ed sil pomoc\u00ed piezoelektrick\u00fdch sn\u00edma\u010d\u016f je ovlivn\u011bna \u0159adou faktor\u016f. Krom\u011b ji\u017e zm\u00edn\u011bn\u00e9ho piezoelektrick\u00e9ho efektu relaxace je d\u016fle\u017eit\u00e1 i teplota, vlhkost a samotn\u00e1 konstrukce sn\u00edma\u010de. Stabilita materi\u00e1lu, kvalita p\u0159ipojen\u00ed a pou\u017eit\u00e9 elektroniky rovn\u011b\u017e hraj\u00ed podstatnou roli. Spr\u00e1vn\u00e1 kalibrace je nezbytn\u00e1 pro z\u00edsk\u00e1n\u00ed spolehliv\u00fdch v\u00fdsledk\u016f.<\/p>\n

Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee piezoelektrick\u00e9 sn\u00edma\u010de mohou b\u00fdt pou\u017eity jak pro statick\u00e9, tak i dynamick\u00e9 m\u011b\u0159en\u00ed sil. Nicm\u00e9n\u011b, jejich uplatn\u011bn\u00ed v oblasti statick\u00e9ho m\u011b\u0159en\u00ed je omezeno piezoelektrick\u00fdm efektem relaxace, kter\u00fd vy\u017eaduje sofistikovan\u00e9 kompenza\u010dn\u00ed techniky. Pro dynamick\u00e9 m\u011b\u0159en\u00ed sil jsou naopak ide\u00e1ln\u00ed volbou d\u00edky sv\u00e9 vysok\u00e9 citlivosti a rychl\u00e9 odezv\u011b. Volba vhodn\u00e9ho typu sn\u00edma\u010de a metody m\u011b\u0159en\u00ed z\u00e1vis\u00ed na konkr\u00e9tn\u00edch po\u017eadavc\u00edch dan\u00e9 aplikace.<\/p>\n","protected":false},"excerpt":{"rendered":"

Piezoelektrick\u00e9 sn\u00edma\u010de nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech m\u011b\u0159en\u00ed, a ot\u00e1zka jejich vyu\u017eit\u00ed pro statick\u00e9 i dynamick\u00e9 m\u011b\u0159en\u00ed sil je proto velice relevantn\u00ed. Jejich princip fungov\u00e1n\u00ed, zalo\u017een\u00fd na vzniku elektrick\u00e9ho n\u00e1boje v reakci na mechanick\u00e9 nam\u00e1h\u00e1n\u00ed, nab\u00edz\u00ed potenci\u00e1l pro p\u0159esn\u00e9 a citliv\u00e9 m\u011b\u0159en\u00ed sil v \u0161irok\u00e9m spektru aplikac\u00ed. Nicm\u00e9n\u011b, existuj\u00ed ur\u010dit\u00e9 limity a specifika, kter\u00e9<\/p>\n","protected":false},"author":1,"featured_media":23744,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62941","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\/62941","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=62941"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62941\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/23744"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}