{"id":65288,"date":"2024-04-02T02:04:45","date_gmt":"2024-04-02T07:04:45","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/shop\/digital-ultrasonic-sound-level-meter\/"},"modified":"2026-03-28T20:58:12","modified_gmt":"2026-03-29T01:58:12","slug":"digital-ultrasonic-sound-level-meter","status":"publish","type":"product","link":"https:\/\/www.bjultrasonic.com\/cs\/shop\/digital-ultrasonic-sound-level-meter\/","title":{"rendered":"Digit\u00e1ln\u00ed Ultrazvukov\u00fd M\u011b\u0159i\u010d Hladiny Zvuku"},"content":{"rendered":"<p>Intenzita ultrazvuku, tak\u00e9 zn\u00e1m\u00e1 jako akustick\u00fd v\u00fdkon, v tekut\u00e9m zvukov\u00e9m poli je kl\u00ed\u010dov\u00fdm faktorem v ultrazvukov\u00fdch syst\u00e9mech. P\u0159\u00edmo ovliv\u0148uje \u010distic\u00ed v\u00fdkon \u010distic\u00edho za\u0159\u00edzen\u00ed a \u00fa\u010dinnost ultrazvukov\u00fdch procesor\u016f. M\u011b\u0159i\u010d intenzity zvuku umo\u017e\u0148uje rychl\u00e9 a pohodln\u00e9 m\u011b\u0159en\u00ed intenzity zvukov\u00e9ho pole kdykoli a kdekoli, p\u0159i\u010dem\u017e jasn\u011b zobrazuje hodnotu akustick\u00e9ho v\u00fdkonu.<\/p>\n<p>Ultrazvukov\u00e9 testovac\u00ed p\u0159\u00edstroje v\u00fdkonu jsou k dispozici v p\u0159enosn\u00fdch a online monitorovac\u00edch modelech, aby vyhovovaly r\u016fzn\u00fdm aplika\u010dn\u00edm pot\u0159eb\u00e1m.<\/p>\n<p>Ultrazvukov\u00e9 m\u011b\u0159i\u010de intenzity zvuku (nebo hladinov\u00e9 m\u011b\u0159i\u010de) vyu\u017e\u00edvaj\u00ed piezoelektrick\u00fd efekt piezoelektrick\u00e9 keramiky. To znamen\u00e1, \u017ee kdy\u017e je na keramiku aplikov\u00e1na s\u00edla, p\u0159em\u011bn\u00ed tuto s\u00edlu na elektrick\u00fd sign\u00e1l. Za stejn\u00fdch podm\u00ednek siln\u011bj\u0161\u00ed s\u00edla produkuje vy\u0161\u0161\u00ed nap\u011bt\u00ed. Pokud se s\u00edla m\u011bn\u00ed periodicky, piezoelektrick\u00e1 keramika bude vyd\u00e1vat st\u0159\u00eddav\u00fd nap\u011b\u0165ov\u00fd sign\u00e1l se stejnou frekvenc\u00ed. Kv\u016fli kavitaci a jin\u00fdm form\u00e1m ru\u0161en\u00ed je skute\u010dn\u00fd nap\u011b\u0165ov\u00fd pr\u016fb\u011bh kombinac\u00ed hlavn\u00ed vlny a v\u00edce vedlej\u0161\u00edch vln. Vysokop\u0159esn\u00fd analyz\u00e1tor ultrazvukov\u00e9 frekvence (energie) na\u0161\u00ed spole\u010dnosti umo\u017e\u0148uje u\u017eivatel\u016fm zobrazit skute\u010dn\u00fd pracovn\u00ed pr\u016fb\u011bh a p\u0159\u00edmo \u010d\u00edst hodnotu intenzity zvuku.<\/p>\n<h3>Kl\u00ed\u010dov\u00e9 vlastnosti<\/h3>\n<ul>\n<li>Jednodotykov\u00e9 automatick\u00e9 m\u011b\u0159en\u00ed s automatick\u00fdm zobrazen\u00edm intenzity zvuku a pr\u016fb\u011bhu.<\/li>\n<li>Digit\u00e1ln\u00ed zobrazen\u00ed hodnoty intenzity zvuku i frekvence.<\/li>\n<li>3,2palcov\u00fd barevn\u00fd LCD displej s rozli\u0161en\u00edm 320&#215;240 a LED podsv\u00edcen\u00edm.<\/li>\n<li>Vestav\u011bn\u00fd lithiov\u00fd akumul\u00e1tor 2300mAh a extern\u00ed AC nap\u00e1jec\u00ed adapt\u00e9r.<\/li>\n<li>Automatick\u00e9 vypnut\u00ed po 10 minut\u00e1ch bez vstupn\u00edho sign\u00e1lu.<\/li>\n<\/ul>\n<h3>\u010casto kladen\u00e9 ot\u00e1zky<\/h3>\n<p><strong>Data v\u017edy ukazuj\u00ed nulu.<\/strong><\/p>\n<p>A: Kdy\u017e je sonda ve vzduchu, m\u011b\u0159i\u010d intenzity zvuku okam\u017eit\u011b uk\u00e1\u017ee re\u00e1lnou hodnotu intenzity zvuku 0 W\/cm\u00b2 a po jedn\u00e9 minut\u011b se automaticky vypne.<\/p>\n<p><strong>Nam\u011b\u0159en\u00e9 hodnoty se zdaj\u00ed nep\u0159esn\u00e9.<\/strong><\/p>\n<p>A: Intenzita zvuku ultrazvuku je komplexn\u00ed pojem. Nelze ji jednodu\u0161e vypo\u010d\u00edtat vyd\u011blen\u00edm celkov\u00e9ho v\u00fdkonu plochou z\u00e1\u0159en\u00ed; mus\u00ed b\u00fdt zm\u011b\u0159ena. Na\u0161e m\u011b\u0159i\u010de intenzity zvuku jsou kalibrov\u00e1ny pomoc\u00ed standardn\u00ed intenzity zvuku p\u0159ed opu\u0161t\u011bn\u00edm tov\u00e1rny, co\u017e zaji\u0161\u0165uje p\u0159esnost nam\u011b\u0159en\u00fdch hodnot. Intenzita zvuku m\u00e1 limit; jakmile je ve vod\u011b dosa\u017eeno ur\u010dit\u00e9ho prahu, p\u0159id\u00e1n\u00ed dal\u0161\u00edch m\u011bni\u010d\u016f nebo zv\u00fd\u0161en\u00ed v\u00fdkonu nemus\u00ed v\u00e9st k line\u00e1rn\u00edmu zv\u00fd\u0161en\u00ed intenzity zvuku, nebo dokonce k \u017e\u00e1dn\u00e9 zm\u011bn\u011b.<\/p>\n<p><strong>Vysokofrekven\u010dn\u00ed za\u0159\u00edzen\u00ed nelze m\u011b\u0159it.<\/strong><\/p>\n<p>A: Na\u0161e m\u011b\u0159i\u010de intenzity zvuku jsou navr\u017eeny pro standardn\u00ed ultrazvukov\u00e9 \u010distic\u00ed stroje, pokr\u00fdvaj\u00edc\u00ed prim\u00e1rn\u00ed frekven\u010dn\u00ed rozsah 10-200kHz. M\u011b\u0159en\u00ed proveden\u00e1 mimo tento rozsah budou nep\u0159esn\u00e1. To lze \u0159e\u0161it dv\u011bma zp\u016fsoby:<\/p>\n<ul>\n<li>Informujte n\u00e1s o konkr\u00e9tn\u00edm frekven\u010dn\u00edm rozsahu, kter\u00fd pot\u0159ebujete m\u011b\u0159it, a my m\u016f\u017eeme vytvo\u0159it p\u0159izp\u016fsoben\u00fd displej a sondu.<\/li>\n<li>Pou\u017eijte osciloskop pro relativn\u00ed m\u011b\u0159en\u00ed. Sonda m\u016f\u017ee b\u00fdt p\u0159\u00edmo p\u0159ipojena k osciloskopu a intenzita zvuku m\u016f\u017ee b\u00fdt porovn\u00e1na \u010dten\u00edm \u010dasov\u00e9ho sign\u00e1lu osciloskopu. Tato metoda neposkytuje absolutn\u00ed hodnotu intenzity zvuku, ale umo\u017e\u0148uje porovn\u00e1n\u00ed mezi m\u011b\u0159en\u00edmi.<\/li>\n<\/ul>\n<p><strong>\u010cten\u00ed je abnorm\u00e1ln\u00ed; hodnota se objev\u00ed i kdy\u017e nen\u00ed v kapalin\u011b.<\/strong><\/p>\n<p>A: Tento probl\u00e9m indikuje po\u0161kozen\u00ed zobrazovac\u00ed jednotky a vy\u017eaduje vr\u00e1cen\u00ed na\u0161\u00ed spole\u010dnosti k oprav\u011b.<\/p>\n<p><strong>Displej je \u010dern\u00fd bez zobrazen\u00ed.<\/strong><\/p>\n<p>A: P\u0159\u00edstroj m\u00e1 re\u017eim \u00faspory energie. Displej se vypne, pokud je nam\u011b\u0159en\u00e1 intenzita zvuku 0 W\/cm\u00b2 po dobu jedn\u00e9 minuty. Pokud stisknut\u00ed tla\u010d\u00edtka ON\/OFF neobnov\u00ed zobrazen\u00ed, zkuste vym\u011bnit baterii. Pokud displej z\u016fstane vypnut\u00fd, znamen\u00e1 to, \u017ee obrazovka je po\u0161kozena a vy\u017eaduje vr\u00e1cen\u00ed do na\u0161\u00ed tov\u00e1rny k oprav\u011b.<\/p>\n<p><strong>Nam\u011b\u0159en\u00e9 hodnoty se v\u00fdrazn\u011b li\u0161\u00ed p\u0159i sou\u010dasn\u00e9m pou\u017eit\u00ed dvou za\u0159\u00edzen\u00ed.<\/strong><\/p>\n<p>A: Na\u0161e ultrazvukov\u00e1 za\u0159\u00edzen\u00ed jsou p\u0159ed odesl\u00e1n\u00edm kalibrov\u00e1na standardn\u00edm zvukov\u00fdm polem. P\u0159i ultrazvukov\u00e9m \u010di\u0161t\u011bn\u00ed se zvukov\u00e9 vlny odr\u00e1\u017eej\u00ed od st\u011bn n\u00e1doby a vodn\u00ed hladiny, co\u017e zp\u016fsobuje, \u017ee intenzita zvuku se v cel\u00e9m \u010distic\u00edm stroji m\u011bn\u00ed. T\u00edm vznik\u00e1 stojat\u00e9 vlnov\u00e9 pole, kde je intenzita zvuku minim\u00e1ln\u00ed v uzlech a maxim\u00e1ln\u00ed v kmitn\u00e1ch.<\/p>\n<p>Nap\u0159\u00edklad v 28kHz \u010distic\u00edm stroji je vlnov\u00e1 d\u00e9lka zvuku ve vod\u011b 5,4 cm, s dv\u011bma uzly a dv\u011bma kmitnami na vlnovou d\u00e9lku. To znamen\u00e1, \u017ee vzd\u00e1lenost mezi uzlem a kmitnou je 1,3 cm. Pro 40kHz stroj je tato vzd\u00e1lenost 0,9 cm.<\/p>\n<p>Proto p\u0159i pou\u017eit\u00ed dvou m\u011b\u0159i\u010d\u016f intenzity zvuku je nezbytn\u00e9, aby m\u011b\u0159ily stejn\u00fd bod, aby bylo mo\u017en\u00e9 p\u0159esn\u011b porovnat nam\u011b\u0159en\u00e9 hodnoty. Vzhledem k t\u011bsn\u00e9 bl\u00edzkosti uzl\u016f a kmiten jsou ru\u010dn\u00ed m\u011b\u0159en\u00ed n\u00e1chyln\u00e1 k chyb\u00e1m kv\u016fli nevyhnuteln\u00e9mu pohybu, kter\u00fd m\u011bn\u00ed zvukov\u00e9 pole. Na\u0161e spole\u010dnost doporu\u010duje pou\u017e\u00edt mechanickou up\u00ednac\u00ed metodu k upevn\u011bn\u00ed sondy a zaji\u0161t\u011bn\u00ed konzistentn\u00edch m\u00edst m\u011b\u0159en\u00ed. Toto kontrolovan\u00e9 prost\u0159ed\u00ed umo\u017e\u0148uje smyslupln\u00e9 porovn\u00e1n\u00ed mezi dv\u011bma za\u0159\u00edzen\u00edmi.<\/p>\n<p><strong>Hodnoty se v\u00fdrazn\u011b li\u0161\u00ed p\u0159i testov\u00e1n\u00ed na r\u016fzn\u00fdch m\u00edstech ve stejn\u00e9 n\u00e1dr\u017ei.<\/strong><\/p>\n<p>A: Ultrazvukov\u00e9 \u010distic\u00ed stroje obecn\u011b pou\u017e\u00edvaj\u00ed n\u00e1st\u011bnn\u00e9 m\u011bni\u010de p\u0159ipevn\u011bn\u00e9 ke dnu nebo stran\u00e1m n\u00e1dr\u017ee. Proces instalace, rozm\u011brov\u00e9 specifikace a konzistence t\u011bchto m\u011bni\u010d\u016f mohou v\u0161echny p\u0159isp\u011bt k nerovnom\u011brn\u00e9mu zvukov\u00e9mu poli uvnit\u0159 \u010distic\u00ed n\u00e1dr\u017ee, co\u017e vede k variac\u00edm v intenzit\u011b zvuku na r\u016fzn\u00fdch m\u00edstech a t\u00edm i k r\u016fzn\u00fdm nam\u011b\u0159en\u00fdm hodnot\u00e1m.<\/p>\n<p><strong>Jak \u010dasto pot\u0159ebuje p\u0159\u00edstroj p\u0159ekalibrov\u00e1n\u00ed a jak se to ur\u010duje?<\/strong><\/p>\n<p>A: Na z\u00e1klad\u011b kalibra\u010dn\u00ed normy pro detek\u010dn\u00ed m\u011bni\u010d by tento typ produktu m\u011bl b\u00fdt kalibrov\u00e1n jednou ro\u010dn\u011b.<\/p>\n<p><strong>Ve zobrazovac\u00ed jednotce je neobvykl\u00fd \u0161um.<\/strong><\/p>\n<p>A: To m\u016f\u017ee b\u00fdt zp\u016fsobeno uvoln\u011bn\u00fdmi vnit\u0159n\u00edmi komponentami. Doporu\u010duje se vr\u00e1tit jednotku ke kontrole a oprav\u011b.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Digit\u00e1ln\u00ed ultrazvukov\u00fd m\u011b\u0159i\u010d hladiny zvuku je za\u0159\u00edzen\u00ed pou\u017e\u00edvan\u00e9 k m\u011b\u0159en\u00ed intenzity ultrazvuku v kapalin\u00e1ch. Pou\u017e\u00edv\u00e1 se p\u0159edev\u0161\u00edm pro m\u011b\u0159en\u00ed pr\u016fmyslov\u00fdch aplikac\u00ed, jako je ultrazvukov\u00e9 \u010di\u0161t\u011bn\u00ed a ultrazvukov\u00e1 sonochemie. Hlavn\u00edmi m\u011b\u0159en\u00fdmi parametry jsou intenzita ultrazvuku, tvar ultrazvukov\u00e9ho sign\u00e1lu, pracovn\u00ed frekvence, maxim\u00e1ln\u00ed intenzita, minim\u00e1ln\u00ed intenzita a doba m\u011b\u0159en\u00ed.<\/p>\n","protected":false},"featured_media":42067,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[6214],"product_tag":[],"class_list":{"0":"post-65288","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ultrasonic-meter-cs","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-external","12":"prodpage-classic"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/product\/65288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=65288"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/42067"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=65288"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/product_brand?post=65288"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/product_cat?post=65288"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/product_tag?post=65288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}