{"id":19804,"date":"2025-07-01T03:19:11","date_gmt":"2025-07-01T03:19:11","guid":{"rendered":"https:\/\/www.kcsensor.com\/?p=19804"},"modified":"2025-10-16T01:54:52","modified_gmt":"2025-10-16T01:54:52","slug":"ultrasonic-level-meter-universal-power-adaptation-test-and-grounding-solutions","status":"publish","type":"post","link":"https:\/\/www.kcsensor.com\/cs\/ultrasonic-level-meter-universal-power-adaptation-test-and-grounding-solutions\/","title":{"rendered":"Ultrazvukov\u00fd m\u011b\u0159i\u010d hladiny \u2013 univerz\u00e1ln\u00ed \u0159e\u0161en\u00ed pro testov\u00e1n\u00ed nap\u00e1jen\u00ed a uzemn\u011bn\u00ed"},"content":{"rendered":"

1. Souvislosti probl\u00e9mu: Poruchy zp\u016fsoben\u00e9 univerz\u00e1ln\u00edmi nap\u00e1jec\u00edmi zdroji<\/strong><\/h4>\n\n\n\n

P\u0159i pou\u017e\u00edv\u00e1n\u00ed ultrazvukov\u00fdch hladinom\u011br\u016f \u0159ady KUS s univerz\u00e1ln\u00edmi nap\u00e1jec\u00edmi zdroji pro nap\u011bt\u00ed 220 V a\u017e 24 V\/12 V se z\u00e1kazn\u00edci setkali se dv\u011bma hlavn\u00edmi probl\u00e9my:<\/p>\n\n\n\n

    \n
  1. Porucha s\u00e9riov\u00e9 komunikace (p\u0159eru\u0161en\u00ed komunikace RS485);<\/li>\n\n\n\n
  2. Odchylka m\u011b\u0159en\u00ed (skute\u010dn\u00e1 vzd\u00e1lenost 3 m vykazovala v\u00fdkyvy v rozmez\u00ed p\u0159ibli\u017en\u011b 1 m).
    Testovan\u00e9 v\u00fdkonov\u00e9 moduly:<\/li>\n<\/ol>\n\n\n\n
      \n
    • Modul pro p\u0159evod 220 V st\u0159\u00eddav\u00e9ho proudu na 24 V stejnosm\u011brn\u00e9ho proudu<\/li>\n\n\n\n
    • Modul pro p\u0159evod 220 V st\u0159\u00eddav\u00e9ho proudu na 12 V stejnosm\u011brn\u00e9ho proudu<\/li>\n<\/ul>\n\n\n\n
      \"\"<\/figure>\n\n\n\n

      2. Z\u00e1pis z testu nap\u00e1jec\u00edho modulu 12 V DC<\/strong><\/h4>\n\n\n\n

      Tabulka 1: Kroky a v\u00fdsledky testov\u00e1n\u00ed 12V nap\u00e1jec\u00edho modulu<\/strong><\/p>\n\n\n\n

      Testovac\u00ed krok<\/th>Podrobnosti o operaci<\/th>V\u00fdsledky test\u016f<\/th><\/tr><\/thead>
      1. M\u011b\u0159en\u00ed vln\u011bn\u00ed<\/td>Osciloskopov\u00e9 sondy p\u0159ipojen\u00e9 k V+ a V-, st\u0159\u00eddav\u00e9 zapojen\u00ed, mezn\u00ed \u0161\u00ed\u0159ka p\u00e1sma 20 MHz<\/td>Zvln\u011bn\u00ed: troj\u00faheln\u00edkov\u00e1 vlna o amplitud\u011b 20\u201330 mV, co\u017e vylu\u010duje zvln\u011bn\u00ed jako p\u0159\u00ed\u010dinu chyb m\u011b\u0159en\u00ed<\/td><\/tr>
      2. Zkou\u0161ka bez uzemn\u011bn\u00ed<\/td>V\u00fdkonov\u00fd modul nen\u00ed uzemn\u011bn, sn\u00edma\u010d m\u011b\u0159\u00ed skute\u010dnou vzd\u00e1lenost 3 m<\/td>Hodnota se pohybovala kolem 1 m, nastaven\u00ed prahov\u00e9 hodnoty neplatn\u00e9; po p\u0159epnut\u00ed na stoln\u00ed nap\u00e1jec\u00ed zdroj se v\u0161e vr\u00e1tilo do norm\u00e1lu<\/td><\/tr>
      3. Zkou\u0161ka s uzemn\u011bn\u00edm<\/td>Nap\u00e1jec\u00ed modul je uzemn\u011bn, kabely sn\u00edma\u010d\u016f jsou vedeny mimo dosah vodi\u010d\u016f s nap\u011bt\u00edm 220 V<\/td>M\u011b\u0159en\u00ed bylo p\u0159esn\u00e9 (3 m); chyby se znovu objevily, kdy\u017e se kabely nach\u00e1zely v bl\u00edzkosti vodi\u010d\u016f s nap\u011bt\u00edm 220 V<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      \"\"<\/figure>\n\n\n\n

      3. Test nap\u00e1jec\u00edho modulu 24 V DC a anal\u00fdza poruch komunikace<\/strong><\/h4>\n\n\n\n

      Tabulka 2: Test nap\u00e1jec\u00edho modulu 24 V vs. probl\u00e9my s komunikac\u00ed<\/strong><\/p>\n\n\n\n

      Testovac\u00ed sc\u00e9n\u00e1\u0159<\/th>Stav uzemn\u011bn\u00ed<\/th>V\u00fdkon komunikace RS485<\/th>V\u00fdsledky m\u011b\u0159en\u00ed<\/th>Charakteristiky interferen\u010dn\u00edch vln<\/th><\/tr><\/thead>
      Standardn\u00ed test<\/td>Bez uzemn\u011bn\u00ed<\/td>\u010cast\u00e9 v\u00fdpadky komunikace, ob\u010dasn\u00e9 p\u0159ipojen\u00ed<\/td>Nenorm\u00e1ln\u00ed nam\u011b\u0159en\u00e9 hodnoty, neplatn\u00e9 nastaven\u00ed prahov\u00e9 hodnoty<\/td>\u0160um \u0161pi\u010dka-\u0161pi\u010dka 13 V, 50 Hz (propojen\u00ed se s\u00edt\u00ed)<\/td><\/tr>
      Optimalizovan\u00fd test<\/td>Uzemn\u011bn\u00ed + GND p\u0159ipojeno k V-<\/td>Stabiln\u00ed komunikace bez p\u0159eru\u0161en\u00ed<\/td>P\u0159esn\u00e1 m\u011b\u0159en\u00ed odpov\u00eddaj\u00edc\u00ed skute\u010dn\u00e9 vzd\u00e1lenosti<\/td>\u017d\u00e1dn\u00e9 zjevn\u00e9 ru\u0161en\u00ed (obr\u00e1zek 3)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Hlavn\u00ed p\u0159\u00ed\u010dina selh\u00e1n\u00ed komunikace<\/strong>:<\/p>\n\n\n\n

        \n
      • Plovouc\u00ed v\u00fdvody V+ a V- vytv\u00e1\u0159ej\u00ed potenci\u00e1ln\u00ed rozd\u00edl mezi sign\u00e1ly RS485 a zem\u00ed, co\u017e zp\u016fsobuje ru\u0161en\u00ed.<\/li>\n\n\n\n
      • \u0158e\u0161en\u00ed: Propojte GND s V-, aby se odstranil potenci\u00e1ln\u00ed rozd\u00edl (obr\u00e1zek 4).<\/li>\n<\/ul>\n\n\n\n

        4. \u010cty\u0159i kl\u00ed\u010dov\u00e9 body pro univerz\u00e1ln\u00ed p\u0159izp\u016fsoben\u00ed nap\u00e1jen\u00ed (souhrn)<\/strong><\/h4>\n\n\n\n
          \n
        1. Priorita uzemn\u011bn\u00ed<\/strong>: V\u00fdkonov\u00fd modul mus\u00ed b\u00fdt \u0159\u00e1dn\u011b uzemn\u011bn, aby se nap\u011bt\u00ed V- vyrovnalo s potenci\u00e1lem zem\u011b;<\/li>\n\n\n\n
        2. Spole\u010dn\u00e1 zemn\u00edc\u00ed svorka sign\u00e1lu<\/strong>: Propojte GND s V-, aby se vyrovnal potenci\u00e1lov\u00fd rozd\u00edl v rozhran\u00ed RS485;<\/li>\n\n\n\n
        3. Izolace kabel\u016f<\/strong>: Dodr\u017eujte vzd\u00e1lenost \u226530 cm mezi kabely sn\u00edma\u010de a vodi\u010di 220 V;<\/li>\n\n\n\n
        4. Bezpe\u010dnostn\u00ed upozorn\u011bn\u00ed<\/strong>: Zabra\u0148te tomu, aby se kabely sn\u00edma\u010d\u016f dostaly do kontaktu s vysok\u00fdm nap\u011bt\u00edm 220 V, a p\u0159edejd\u011bte tak \u00farazu elektrick\u00fdm proudem.<\/li>\n<\/ol>\n\n\n\n

          5. Porovn\u00e1n\u00ed pr\u016fb\u011bh\u016f a potla\u010den\u00ed ru\u0161en\u00ed<\/strong><\/h4>\n\n\n\n

          (1) Ru\u0161en\u00ed mezi V+ a zem\u00ed (bez uzemn\u011bn\u00ed)<\/strong>: 42,8 V \u0161pi\u010dka-\u0161pi\u010dka, ru\u0161en\u00ed ze s\u00edt\u011b 50 Hz; ;<\/p>\n\n\n\n

          \"\"<\/figure>\n\n\n\n

          (2) Sign\u00e1l RS485 (uzemn\u011bn\u00fd)<\/strong>: Ru\u0161en\u00ed odstran\u011bno, stabilita komunikace 100%. .<\/p>\n\n\n\n

            <\/ul>\n\n\n\n

            <\/p>","protected":false},"excerpt":{"rendered":"

            1. Problem Background: Anomalies Caused by Universal Power Supplies During the use of KUS series ultrasonic level meters with 220V to 24V\/12V universal power supplies, customers encountered two key issues: 2. 12V DC Power Module Test Record Table 1: 12V Power Module Test Steps and Results Test Step Operation Details Test Results 1. Ripple Measurement […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[114],"tags":[],"class_list":["post-19804","post","type-post","status-publish","format-standard","hentry","category-ultrasonic-sensor"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/posts\/19804","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/comments?post=19804"}],"version-history":[{"count":0,"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/posts\/19804\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/media?parent=19804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/categories?post=19804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kcsensor.com\/cs\/wp-json\/wp\/v2\/tags?post=19804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}