{"id":62786,"date":"2022-09-27T13:09:10","date_gmt":"2022-09-27T18:09:10","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-do-ultrasonic-sensors-work\/"},"modified":"2025-01-27T06:05:33","modified_gmt":"2025-01-27T11:05:33","slug":"how-do-ultrasonic-sensors-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-do-ultrasonic-sensors-work\/","title":{"rendered":"Ultrazvukov\u00e9 senzory: princip fungov\u00e1n\u00ed a aplikace"},"content":{"rendered":"

Ultrazvukov\u00e9 senzory se staly ned\u00edlnou sou\u010d\u00e1st\u00ed mnoha modern\u00edch aplikac\u00ed, od parkovac\u00edch senzor\u016f v automobilech a\u017e po automatizaci v pr\u016fmyslu. Fungov\u00e1n\u00ed t\u011bchto senzor\u016f je zalo\u017eeno na principu vys\u00edl\u00e1n\u00ed a n\u00e1sledn\u00e9ho p\u0159ij\u00edm\u00e1n\u00ed ultrazvukov\u00fdch vln. Tento \u010dl\u00e1nek se podrobn\u011bji zam\u011b\u0159\u00ed na fyzik\u00e1ln\u00ed principy a technick\u00e9 detaily, kter\u00e9 umo\u017e\u0148uj\u00ed m\u011b\u0159en\u00ed vzd\u00e1lenosti a detekci objekt\u016f pomoc\u00ed ultrazvukov\u00fdch senzor\u016f.<\/p>\n

Princip \u010dinnosti<\/p>\n

Ultrazvukov\u00fd senzor funguje na principu echolokace. Vys\u00edla\u010d v senzoru generuje kr\u00e1tk\u00e9 impulsy ultrazvukov\u00fdch vln, kter\u00e9 se \u0161\u00ed\u0159\u00ed okoln\u00edm prost\u0159ed\u00edm. Tyto vlny se odraz\u00ed od p\u0159ek\u00e1\u017eky a vr\u00e1t\u00ed se zp\u011bt k p\u0159ij\u00edma\u010di v senzoru. \u010cas, kter\u00fd uplyne mezi vysl\u00e1n\u00edm impulsu a p\u0159ijet\u00edm odra\u017een\u00e9 vlny, se vyu\u017e\u00edv\u00e1 k v\u00fdpo\u010dtu vzd\u00e1lenosti k p\u0159ek\u00e1\u017ece. Rychlost \u0161\u00ed\u0159en\u00ed zvuku ve vzduchu (p\u0159ibli\u017en\u011b 343 m\/s p\u0159i 20 \u00b0C) je zn\u00e1m\u00e1 konstanta, a proto je v\u00fdpo\u010det vzd\u00e1lenosti relativn\u011b jednoduch\u00fd: Vzd\u00e1lenost = (Rychlost zvuku \u00d7 \u010cas) \/ 2. D\u011blen\u00ed dv\u011bma je nutn\u00e9, proto\u017ee zvuk mus\u00ed urazit cestu tam i zp\u011bt.<\/p>\n

Typy ultrazvukov\u00fdch senzor\u016f<\/p>\n

Existuje n\u011bkolik typ\u016f ultrazvukov\u00fdch senzor\u016f, kter\u00e9 se li\u0161\u00ed v konstrukci a aplika\u010dn\u00edm vyu\u017eit\u00ed. Mezi nej\u010dast\u011bj\u0161\u00ed pat\u0159\u00ed:<\/p>\n\n\n\n\n\n\n\n
Typ senzoru<\/th>\nCharakteristika<\/th>\nAplikace<\/th>\n<\/tr>\n<\/thead>\n
Analogov\u00e9 senzory<\/td>\nVracej\u00ed analogov\u00fd sign\u00e1l \u00fam\u011brn\u00fd vzd\u00e1lenosti.<\/td>\nJednoduch\u00e9 aplikace, m\u011b\u0159en\u00ed vzd\u00e1lenosti.<\/td>\n<\/tr>\n
Digit\u00e1ln\u00ed senzory<\/td>\nVracej\u00ed digit\u00e1ln\u00ed data, \u010dasto v\u010detn\u011b informac\u00ed o s\u00edle sign\u00e1lu.<\/td>\nSlo\u017eit\u011bj\u0161\u00ed aplikace, detekce objekt\u016f, m\u011b\u0159en\u00ed vzd\u00e1lenosti s vy\u0161\u0161\u00ed p\u0159esnost\u00ed.<\/td>\n<\/tr>\n
Senzory s v\u00edce prvky<\/td>\nObsahuj\u00ed v\u00edce vys\u00edla\u010d\u016f a p\u0159ij\u00edma\u010d\u016f pro p\u0159esn\u011bj\u0161\u00ed m\u011b\u0159en\u00ed a detekci objekt\u016f v \u0161ir\u0161\u00edm \u00fahlu.<\/td>\nRobotika, autonomn\u00ed vozidla.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

P\u0159esnost m\u011b\u0159en\u00ed vzd\u00e1lenosti ultrazvukov\u00fdmi senzory m\u016f\u017ee b\u00fdt ovlivn\u011bna n\u011bkolika faktory:<\/p>\n

    \n
  • Teplota:<\/strong> Rychlost zvuku se m\u011bn\u00ed s teplotou, co\u017e ovliv\u0148uje p\u0159esnost v\u00fdpo\u010dtu vzd\u00e1lenosti. N\u011bkter\u00e9 senzory obsahuj\u00ed teplotn\u00ed kompenzaci.<\/li>\n
  • Vlhkost:<\/strong> Vlhkost vzduchu m\u016f\u017ee tak\u00e9 ovlivnit rychlost \u0161\u00ed\u0159en\u00ed zvuku.<\/li>\n
  • \u00dahel dopadu:<\/strong> Odraz ultrazvukov\u00fdch vln z\u00e1vis\u00ed na \u00fahlu dopadu na p\u0159ek\u00e1\u017eku. Kolm\u00fd dopad poskytuje nejlep\u0161\u00ed v\u00fdsledek.<\/li>\n
  • Materi\u00e1l p\u0159ek\u00e1\u017eky:<\/strong> R\u016fzn\u00e9 materi\u00e1ly odr\u00e1\u017eej\u00ed ultrazvukov\u00e9 vlny s r\u016fznou intenzitou. Tvrd\u00e9, hladk\u00e9 povrchy odr\u00e1\u017eej\u00ed vlny l\u00e9pe ne\u017e m\u011bkk\u00e9, p\u00f3rovit\u00e9 materi\u00e1ly.<\/li>\n
  • \u0160um:<\/strong> Elektrick\u00fd \u0161um m\u016f\u017ee ovlivnit p\u0159esnost m\u011b\u0159en\u00ed.<\/li>\n<\/ul>\n

    Aplikace ultrazvukov\u00fdch senzor\u016f<\/p>\n

    Ultrazvukov\u00e9 senzory nach\u00e1zej\u00ed \u0161irok\u00e9 uplatn\u011bn\u00ed v r\u016fzn\u00fdch oblastech:<\/p>\n

      \n
    • Automatizace:<\/strong> Detekce objekt\u016f v pr\u016fmyslov\u00fdch procesech, robotika, \u0159\u00edzen\u00ed stroj\u016f.<\/li>\n
    • Automobilov\u00fd pr\u016fmysl:<\/strong> Parkovac\u00ed senzory, asisten\u010dn\u00ed syst\u00e9my \u0159idi\u010de.<\/li>\n
    • M\u011b\u0159en\u00ed vzd\u00e1lenosti:<\/strong> Geodetick\u00e9 m\u011b\u0159en\u00ed, pr\u016fmyslov\u00e9 m\u011b\u0159en\u00ed.<\/li>\n
    • Medic\u00edna:<\/strong> Ultrazvukov\u00e9 zobrazov\u00e1n\u00ed.<\/li>\n<\/ul>\n

      Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee ultrazvukov\u00e9 senzory jsou spolehliv\u00e9 a efektivn\u00ed n\u00e1stroje pro m\u011b\u0159en\u00ed vzd\u00e1lenosti a detekci objekt\u016f. Pochopen\u00ed princip\u016f jejich \u010dinnosti a faktor\u016f ovliv\u0148uj\u00edc\u00edch p\u0159esnost m\u011b\u0159en\u00ed je kl\u00ed\u010dov\u00e9 pro jejich efektivn\u00ed vyu\u017eit\u00ed v r\u016fzn\u00fdch aplikac\u00edch. Pokroky v technologii vedou k neust\u00e1l\u00e9mu zlep\u0161ov\u00e1n\u00ed p\u0159esnosti a spolehlivosti t\u011bchto senzor\u016f, co\u017e roz\u0161i\u0159uje jejich aplika\u010dn\u00ed mo\u017enosti.<\/p>\n","protected":false},"excerpt":{"rendered":"

      Ultrazvukov\u00e9 senzory se staly ned\u00edlnou sou\u010d\u00e1st\u00ed mnoha modern\u00edch aplikac\u00ed, od parkovac\u00edch senzor\u016f v automobilech a\u017e po automatizaci v pr\u016fmyslu. Fungov\u00e1n\u00ed t\u011bchto senzor\u016f je zalo\u017eeno na principu vys\u00edl\u00e1n\u00ed a n\u00e1sledn\u00e9ho p\u0159ij\u00edm\u00e1n\u00ed ultrazvukov\u00fdch vln. Tento \u010dl\u00e1nek se podrobn\u011bji zam\u011b\u0159\u00ed na fyzik\u00e1ln\u00ed principy a technick\u00e9 detaily, kter\u00e9 umo\u017e\u0148uj\u00ed m\u011b\u0159en\u00ed vzd\u00e1lenosti a detekci objekt\u016f pomoc\u00ed ultrazvukov\u00fdch senzor\u016f. Princip \u010dinnosti<\/p>\n","protected":false},"author":1,"featured_media":18705,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-62786","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\/62786","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=62786"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/62786\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/18705"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=62786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=62786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=62786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}