{"id":62911,"date":"2022-09-13T16:27:06","date_gmt":"2022-09-13T21:27:06","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-a-spice-model-and-is-it-available-for-piezo-sensors\/"},"modified":"2025-01-27T06:16:50","modified_gmt":"2025-01-27T11:16:50","slug":"what-is-a-spice-model-and-is-it-available-for-piezo-sensors","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/what-is-a-spice-model-and-is-it-available-for-piezo-sensors\/","title":{"rendered":"SPICE modely a jejich pou\u017eit\u00ed pro piezo sn\u00edma\u010de"},"content":{"rendered":"<p>Spalovac\u00ed modely (SPICE) se v elektronice \u0161iroce pou\u017e\u00edvaj\u00ed k simulaci a anal\u00fdze elektrick\u00fdch obvod\u016f.  Tyto modely popisuj\u00ed chov\u00e1n\u00ed jednotliv\u00fdch sou\u010d\u00e1stek, v\u010detn\u011b jejich nelinearit a parazitn\u00edch efekt\u016f, pomoc\u00ed matematick\u00fdch rovnic.  Ot\u00e1zkou je, zda a jak je mo\u017en\u00e9 pou\u017e\u00edt SPICE modely pro piezoelektrick\u00e9 senzory, kter\u00e9 p\u0159edstavuj\u00ed specifickou kategorii senzor\u016f s unik\u00e1tn\u00edmi vlastnostmi.<\/p>\n<h3>Piezoelektrick\u00e9 senzory a jejich specifika<\/h3>\n<p>Piezoelektrick\u00e9 senzory generuj\u00ed elektrick\u00fd n\u00e1boj v reakci na mechanick\u00fd tlak nebo deformaci.  Na rozd\u00edl od mnoha jin\u00fdch senzor\u016f, jejich chov\u00e1n\u00ed nen\u00ed \u010dist\u011b ohmick\u00e9 a zahrnuje kapacitn\u00ed a piezoelektrick\u00e9 efekty.  To p\u0159edstavuje v\u00fdzvu pro modelov\u00e1n\u00ed pomoc\u00ed SPICE, jeliko\u017e standardn\u00ed modely pro kondenz\u00e1tory, rezistory a dal\u0161\u00ed pasivn\u00ed sou\u010d\u00e1stky nejsou dostate\u010dn\u00e9 pro p\u0159esn\u00fd popis jejich chov\u00e1n\u00ed.  Zahrnuje to i nelinearity v z\u00e1vislosti na velikosti s\u00edly a frekvenci.<\/p>\n<h3>Mo\u017enosti modelov\u00e1n\u00ed v SPICE<\/h3>\n<p>P\u0159es v\u00fd\u0161e zm\u00edn\u011bn\u00e9 komplikace, je mo\u017en\u00e9 piezoelektrick\u00e9 senzory modelovat v SPICE, i kdy\u017e to vy\u017eaduje sofistikovan\u011bj\u0161\u00ed p\u0159\u00edstupy.  Nejjednodu\u0161\u0161\u00ed modely aproximuj\u00ed senzor jako zdroj n\u00e1boje v s\u00e9rii s kapacitou.  To umo\u017e\u0148uje simulovat z\u00e1kladn\u00ed chov\u00e1n\u00ed, ale nepostihuje detaily jako je frekven\u010dn\u00ed odezva nebo nelinearity.<\/p>\n<p>Pro detailn\u011bj\u0161\u00ed modelov\u00e1n\u00ed se pou\u017e\u00edvaj\u00ed slo\u017eit\u011bj\u0161\u00ed modely, kter\u00e9 zahrnuj\u00ed v\u00edce parametr\u016f, jako je piezoelektrick\u00fd koeficient, kapacita, mechanick\u00e1 impedance a dal\u0161\u00ed.  Tyto modely \u010dasto vyu\u017e\u00edvaj\u00ed \u0159\u00edzen\u00e9 zdroje, kter\u00e9 simuluji vztah mezi mechanick\u00fdm vstupem a elektrick\u00fdm v\u00fdstupem.  V\u00fdsledkem je p\u0159esn\u011bj\u0161\u00ed simulace, ale slo\u017eitost modelu se dramaticky zvy\u0161uje.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Typ modelu<\/th>\n<th>Komplexita<\/th>\n<th>P\u0159esnost<\/th>\n<th>Aplikace<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Jednoduch\u00fd model (zdroj n\u00e1boje + kapacita)<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>N\u00edzk\u00e1<\/td>\n<td>Rychl\u00e9 odhady<\/td>\n<\/tr>\n<tr>\n<td>Roz\u0161\u00ed\u0159en\u00fd model (\u0159\u00edzen\u00e9 zdroje, mechanick\u00e1 impedance)<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Detailn\u00ed simulace, optimalizace<\/td>\n<\/tr>\n<tr>\n<td>Elektromechanick\u00fd model<\/td>\n<td>Velmi vysok\u00e1<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Komplexn\u00ed anal\u00fdza, n\u00e1vrh syst\u00e9m\u016f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Dostupnost SPICE model\u016f<\/h3>\n<p>Dostupnost p\u0159edem p\u0159ipraven\u00fdch SPICE model\u016f pro piezoelektrick\u00e9 senzory je omezen\u00e1.  V\u00fdrobci \u010dasto poskytuj\u00ed pouze z\u00e1kladn\u00ed charakteristiky (nap\u0159. citlivost, kapacita), ale ne v\u017edy kompletn\u00ed SPICE model.  V mnoha p\u0159\u00edpadech je nutn\u00e9 vytvo\u0159it si model na z\u00e1klad\u011b experiment\u00e1ln\u00edch dat nebo dat z datasheetu.  To vy\u017eaduje znalost SPICE simula\u010dn\u00edch n\u00e1stroj\u016f a hlub\u0161\u00ed pochopen\u00ed fyziky piezoelektrick\u00e9ho jevu.<\/p>\n<h3>N\u00e1stroje a metody pro tvorbu model\u016f<\/h3>\n<p>Pro tvorbu SPICE model\u016f je mo\u017en\u00e9 pou\u017e\u00edt r\u016fzn\u00e9 simula\u010dn\u00ed n\u00e1stroje, jako jsou LTSpice, Multisim, nebo PSpice.  Proces modelov\u00e1n\u00ed obvykle zahrnuje m\u011b\u0159en\u00ed charakteristik senzoru, extrakci relevantn\u00edch parametr\u016f a implementaci modelu v zvolen\u00e9m simula\u010dn\u00edm n\u00e1stroji.  Pro slo\u017eit\u011bj\u0161\u00ed modely je nutn\u00e9 pou\u017e\u00edt metody numerick\u00e9 anal\u00fdzy a optimalizace parametr\u016f.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee zat\u00edmco standardn\u00ed SPICE modely pro piezoelektrick\u00e9 senzory nejsou b\u011b\u017en\u011b dostupn\u00e9, je mo\u017en\u00e9 je vytvo\u0159it na z\u00e1klad\u011b experiment\u00e1ln\u00edch dat a s pou\u017eit\u00edm vhodn\u00fdch simula\u010dn\u00edch n\u00e1stroj\u016f.  Slo\u017eitost modelu z\u00e1vis\u00ed na po\u017eadovan\u00e9 p\u0159esnosti a detailu simulace.  Pro jednoduch\u00e9 aplikace m\u016f\u017ee sta\u010dit jednoduch\u00fd model, zat\u00edmco pro komplexn\u011bj\u0161\u00ed anal\u00fdzu je nutn\u00e9 pou\u017e\u00edt sofistikovan\u011bj\u0161\u00ed p\u0159\u00edstupy.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spalovac\u00ed modely (SPICE) se v elektronice \u0161iroce pou\u017e\u00edvaj\u00ed k simulaci a anal\u00fdze elektrick\u00fdch obvod\u016f. Tyto modely popisuj\u00ed chov\u00e1n\u00ed jednotliv\u00fdch sou\u010d\u00e1stek, v\u010detn\u011b jejich nelinearit a parazitn\u00edch efekt\u016f, pomoc\u00ed matematick\u00fdch rovnic. Ot\u00e1zkou je, zda a jak je mo\u017en\u00e9 pou\u017e\u00edt SPICE modely pro piezoelektrick\u00e9 senzory, kter\u00e9 p\u0159edstavuj\u00ed specifickou kategorii senzor\u016f s unik\u00e1tn\u00edmi vlastnostmi. Piezoelektrick\u00e9 senzory a jejich specifika<\/p>\n","protected":false},"author":1,"featured_media":551,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62911","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\/62911","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=62911"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62911\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/551"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}