{"id":3007,"date":"2025-12-02T16:04:41","date_gmt":"2025-12-02T08:04:41","guid":{"rendered":"https:\/\/www.siproin-ic.com\/?p=3007"},"modified":"2025-12-02T16:18:30","modified_gmt":"2025-12-02T08:18:30","slug":"based-on-ssp1x20-resistance-bridge-measurement-application","status":"publish","type":"post","link":"https:\/\/www.siproin-ic.com\/tr\/based-on-ssp1x20-resistance-bridge-measurement-application\/","title":{"rendered":"SSP1X20 diren\u00e7 k\u00f6pr\u00fcs\u00fc \u00f6l\u00e7\u00fcm uygulamas\u0131na dayanmaktad\u0131r"},"content":{"rendered":"

Giri\u015f:<\/b><\/strong><\/p>\n

Modern end\u00fcstriyel \u00f6l\u00e7\u00fcm ve otomasyon kontrol\u00fcnde diren\u00e7 k\u00f6pr\u00fcs\u00fc sens\u00f6rleri, y\u00fcksek do\u011fruluk ve kararl\u0131l\u0131klar\u0131 nedeniyle a\u011f\u0131rl\u0131k, bas\u0131n\u00e7 ve gerinim gibi fiziksel b\u00fcy\u00fckl\u00fcklerin alg\u0131lanmas\u0131nda yayg\u0131n olarak kullan\u0131lmaktad\u0131r. Bununla birlikte, y\u00fcksek performansl\u0131 bir diren\u00e7 k\u00f6pr\u00fcs\u00fc \u00f6l\u00e7\u00fcm sisteminin nas\u0131l tasarlanaca\u011f\u0131 ve pratik uygulamalarda g\u00fcvenilirli\u011finin ve do\u011frulu\u011funun nas\u0131l sa\u011flanaca\u011f\u0131 bir\u00e7ok m\u00fchendis ve teknisyenin kar\u015f\u0131la\u015ft\u0131\u011f\u0131 bir zorluktur.<\/p>\n

Bu makalede SSP1X20 diren\u00e7 k\u00f6pr\u00fcs\u00fc \u00f6l\u00e7\u00fcm uygulamas\u0131 \u00f6rnek olarak ele al\u0131nmakta ve donan\u0131m devresi tasar\u0131m\u0131ndan cihaz se\u00e7imine, parametre hesaplamas\u0131ndan yaz\u0131l\u0131m uygulamas\u0131na kadar eksiksiz teknik \u00e7\u00f6z\u00fcm ayr\u0131nt\u0131l\u0131 olarak tan\u0131t\u0131lmaktad\u0131r. Wheatstone k\u00f6pr\u00fclerinin temelleri, gerinim \u00f6l\u00e7er y\u00fck h\u00fccrelerinin nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131 ve orant\u0131l\u0131 \u00f6l\u00e7\u00fcm tekniklerinin uygulanmas\u0131 yoluyla, sistem performans\u0131n\u0131n nas\u0131l optimize edilece\u011fini ve yayg\u0131n sorunlara nas\u0131l \u00e7\u00f6z\u00fcm sa\u011flanaca\u011f\u0131n\u0131 ara\u015ft\u0131r\u0131yoruz.<\/p>\n

\u0130ster elektronik m\u00fchendisi, ister g\u00f6m\u00fcl\u00fc geli\u015ftirici veya y\u00fcksek hassasiyetli \u00f6l\u00e7\u00fcm teknolojisiyle ilgilenen bir merakl\u0131 olun, bu makale size pratik teknik referanslar ve uygulama fikirleri sa\u011flayacakt\u0131r. Daha sonra, ilkelere genel bir bak\u0131\u015fla ba\u015flayaca\u011f\u0131z ve bu sistemin tasar\u0131m\u0131n\u0131 ve uygulamas\u0131n\u0131 ad\u0131m ad\u0131m analiz edece\u011fiz.<\/p>\n

<\/b>1. Prensiplere Genel Bak\u0131\u015f:<\/b><\/strong><\/p>\n

1.1 Wheatstone k\u00f6pr\u00fcs\u00fcn\u00fcn temel \u00e7al\u0131\u015fma prensibi<\/p>\n

Wheatstone k\u00f6pr\u00fcs\u00fc dengeli bir devrede d\u00f6rt diren\u00e7ten olu\u015fur ve temel yap\u0131s\u0131 a\u015fa\u011f\u0131daki gibidir:<\/p>\n

\"\"<\/p>\n

 <\/p>\n

Denge durumu: R1\/R2 = R3\/R4 oldu\u011funda, k\u00f6pr\u00fc dengelidir, Vout = 0<\/p>\n

\u00c7\u0131k\u0131\u015f Gerilimi:<\/p>\n

\u00c7al\u0131\u015fma prensibi:<\/p>\n

Gerilim da\u011f\u0131l\u0131m\u0131: K\u00f6pr\u00fcn\u00fcn Vs besleme gerilimi k\u00f6pr\u00fcn\u00fcn her iki ucuna uygulan\u0131r ve ak\u0131m R1, R2, R3 ve Rx (test direnci) diren\u00e7leri \u00fczerinden da\u011f\u0131t\u0131l\u0131r. K\u00f6pr\u00fcn\u00fcn denge durumu, iki dal\u0131n gerilimlerinin e\u015fit oldu\u011fu ve \u00e7\u0131k\u0131\u015f geriliminin s\u0131f\u0131r oldu\u011fu anlam\u0131na gelir.<\/p>\n

\u00d6l\u00e7\u00fcm Prensibi: Wheatstone k\u00f6pr\u00fcs\u00fcn\u00fcn ana fikri, gerilimdeki de\u011fi\u015fiklikleri \u00f6l\u00e7erek diren\u00e7teki de\u011fi\u015fiklikleri yans\u0131tmakt\u0131r. Diren\u00e7 de\u011fi\u015fti\u011finde, k\u00f6pr\u00fc art\u0131k dengeli de\u011fildir ve galvanometre ak\u0131m\u0131 g\u00f6sterir, b\u00f6ylece diren\u00e7teki de\u011fi\u015fiklik ak\u0131mdaki de\u011fi\u015fiklikle \u00e7\u0131kar\u0131labilir.<\/p>\n

1.2 Gerinim \u00f6l\u00e7er y\u00fck h\u00fccresi prensibi<\/p>\n

Diren\u00e7 gerinim \u00f6l\u00e7erlerin \u00e7al\u0131\u015fma prensibi gerinim etkisine dayan\u0131r, yani iletken veya yar\u0131 iletken malzeme d\u0131\u015f kuvvetin etkisi alt\u0131nda mekanik deformasyon \u00fcretti\u011finde, diren\u00e7 de\u011feri buna g\u00f6re de\u011fi\u015fir ve buna \"gerinim etkisi\" denir. Yar\u0131 iletken gerinim \u00f6l\u00e7erler yar\u0131 iletken malzemelerden yap\u0131l\u0131r ve \u00e7al\u0131\u015fma prensipleri yar\u0131 iletken malzemelerin piezorezistif etkisine dayan\u0131r. Piezorezistif etki, yar\u0131 iletken bir malzemenin belirli bir eksende harici bir kuvvete maruz kald\u0131\u011f\u0131nda direncinin de\u011fi\u015fmesi olgusunu ifade eder. Gerinim \u00f6l\u00e7er, kullan\u0131ld\u0131\u011f\u0131nda bile\u015fenin \u00f6l\u00e7\u00fcm noktas\u0131na s\u0131k\u0131ca yap\u0131\u015ft\u0131r\u0131lan gerinimi \u00f6l\u00e7mek i\u00e7in hassas \u0131zgaralardan olu\u015fan bir bile\u015fendir ve bile\u015fen gerildikten sonra \u00f6l\u00e7\u00fcm noktas\u0131n\u0131n gerinimi ve hassas \u0131zgara da deforme olur ve direnci de\u011fi\u015fir ve daha sonra diren\u00e7 de\u011fi\u015fimi \u00f6zel bir aletle \u00f6l\u00e7\u00fcl\u00fcr ve \u00f6l\u00e7\u00fcm noktas\u0131n\u0131n gerinim de\u011ferine d\u00f6n\u00fc\u015ft\u00fcr\u00fcl\u00fcr. Kablolu diren\u00e7 gerinim \u00f6l\u00e7erler ve folyo diren\u00e7 gerinim \u00f6l\u00e7erler dahil olmak \u00fczere metal diren\u00e7 gerinim \u00f6l\u00e7erlerin bir\u00e7ok \u00e7e\u015fidi ve formu vard\u0131r. Folyo diren\u00e7li gerinim \u00f6l\u00e7er, test par\u00e7as\u0131n\u0131n gerinim de\u011fi\u015fkenini diren\u00e7teki bir de\u011fi\u015fikli\u011fe d\u00f6n\u00fc\u015ft\u00fcrebilen hassas bir ge\u00e7it olarak metal folyo kullan\u0131larak gerinim direnci etkisine dayal\u0131 olarak yap\u0131lan hassas bir elemand\u0131r.<\/p>\n

1.3 Oransal \u00f6l\u00e7\u00fcm prensibi<\/p>\n

Temel avantajlar: Sens\u00f6r g\u00fc\u00e7 kayna\u011f\u0131 ve ADC referans\u0131 olarak ayn\u0131 uyarma kayna\u011f\u0131n\u0131 kullan\u0131n.<\/p>\n

Transfer fonksiyonu: Dijital \u00e7\u0131k\u0131\u015f kodu \u221d (Vsens\u00f6r \/ Veksitasyon) \u00d7 kazan\u00e7<\/p>\n

Hata ofset mekanizmas\u0131: uyarma voltaj\u0131 kaymas\u0131 hem sens\u00f6r \u00e7\u0131k\u0131\u015f\u0131n\u0131 hem de referans voltaj\u0131n\u0131 etkiler; oran hesaplamalar\u0131nda birbirini iptal eder; S\u0131cakl\u0131k kaymas\u0131 ve g\u00fc\u00e7 kayna\u011f\u0131 g\u00fcr\u00fclt\u00fcs\u00fc gibi ortak mod hatalar\u0131 ortadan kald\u0131r\u0131l\u0131r.<\/p>\n

<\/b>2. Donan\u0131m devre tasar\u0131m\u0131<\/b><\/strong><\/p>\n

\"\"<\/b><\/strong><\/p>\n

    \n
  1. Devre ba\u011flant\u0131 talimatlar\u0131<\/li>\n<\/ol>\n
      \n
    • Dijital giri\u015f ve \u00e7\u0131k\u0131\u015f pinleri (CS, SCLK, DIN, DOUT\/DRDY, DRDY'nin kullan\u0131lmas\u0131na gerek yoktur), yumu\u015fak ge\u00e7i\u015fe, a\u015f\u0131m\u0131n bast\u0131r\u0131lmas\u0131na ve bir t\u00fcr a\u015f\u0131r\u0131 gerilim korumas\u0131na olanak tan\u0131yan 47\u03a9'luk bir diren\u00e7le seri olarak ba\u011flan\u0131r.<\/li>\n
    • Harici bir referans kullan\u0131ld\u0131\u011f\u0131nda, kanal 0 se\u00e7ilir ve referans voltaj\u0131 5V'tur.<\/li>\n
    • AIN0\/REFP1 ve AIN1, analog giri\u015ften gelen ka\u00e7ak ak\u0131m\u0131 en aza indirmek i\u00e7in ask\u0131ya al\u0131n\u0131r.<\/li>\n
    • G\u00fc\u00e7 kayna\u011f\u0131ndan a\u015f\u0131r\u0131 ka\u00e7ak ak\u0131m\u0131 \u00f6nlemek i\u00e7in CLK'y\u0131 GND'ye ba\u011flay\u0131n.<\/li>\n
    • SIPROIN, diferansiyel kapasit\u00f6r\u00fcn (C2) ortak mod kapasit\u00f6r\u00fcnden (C1, C3) en az bir b\u00fcy\u00fckl\u00fck s\u0131ras\u0131 (10x) daha y\u00fcksek olmas\u0131n\u0131 \u00f6nerir, \u00e7\u00fcnk\u00fc ortak mod kapasitans\u0131n\u0131n uyumsuzlu\u011fu, ortak mod g\u00fcr\u00fclt\u00fcs\u00fcn\u00fcn diferansiyel g\u00fcr\u00fclt\u00fcye d\u00f6n\u00fc\u015ft\u00fcr\u00fclmesine neden olabilir, a\u015fa\u011f\u0131daki gibi yap\u0131land\u0131r\u0131lm\u0131\u015ft\u0131r: R17 = R18 = 1k\u03a9, C2 = 100nF, C1 = C3 = 10nF.<\/li>\n
    • C8 ve C7 kapasit\u00f6rleri, g\u00fc\u00e7 dekuplaj\u0131 sa\u011flamak \u00fczere e\u015fde\u011fer seri diren\u00e7 (ESR) ve end\u00fcktans (ESL) \u00f6zellikleri sa\u011flamak i\u00e7in \u00e7ok katmanl\u0131 seramik \u00e7ip kapasit\u00f6rleri (MLCC'ler) kullan\u0131r.<\/li>\n<\/ul>\n

      \u00a03. <\/b><\/strong><\/b>Cihaz se\u00e7imi ve parametre hesaplama<\/b><\/strong><\/p>\n

      3.1 \u00c7ekirdek Cihaz Se\u00e7im Tablosu<\/p>\n\n\n\n\n\n\n\n\n\n
      Cihazlar<\/td>\nTeknik \u00d6zellikler<\/td>\nmiktar<\/td>\nSe\u00e7im esas\u0131<\/td>\n<\/tr>\n
      ADC \u00e7ipi<\/td>\nSSP1220, TSSOP-16<\/td>\n1<\/td>\nEntegre PGA ile 24 bit \u0394-SIGMA ADC<\/td>\n<\/tr>\n
      Giri\u015f filtre direnci<\/td>\nR17=R18=1K\u03a9\uff0c0805<\/td>\n2<\/td>\nAk\u0131m s\u0131n\u0131rlama korumas\u0131, filtreleme<\/td>\n<\/tr>\n
      Diferansiyel kapasit\u00f6r\u00fc girin<\/td>\nC2=100nF, X7R, 50V, 0805<\/td>\n1<\/td>\nDiferansiyel g\u00fcr\u00fclt\u00fc filtreleme<\/td>\n<\/tr>\n
      Giri\u015f ortak mod kondansat\u00f6rleri<\/td>\nC1=C3=10nF, X7R,50V,0805<\/td>\n2<\/td>\nOrtak mod g\u00fcr\u00fclt\u00fc bast\u0131rma<\/td>\n<\/tr>\n
      dekuplaj kondansat\u00f6rleri<\/td>\nC7=C8=100nF, X7R,16V,0603<\/td>\n2<\/td>\nD\u00fc\u015f\u00fck ESR\/ESL MLCC<\/td>\n<\/tr>\n
      Harici referans kayna\u011f\u0131<\/td>\n5V\u00b10,1%<\/td>\n1<\/td>\nY\u00fcksek hassasiyetli k\u0131yaslamalar<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      3.2 Parametre hesaplama<\/p>\n

      3.2.1 Dijital Aray\u00fcz Direnci Hesaplamas\u0131<\/p>\n

      (1) 47\u03a9 direncin analizi:<\/p>\n

      Ana i\u015flevler: sinyal a\u015f\u0131m\u0131n\u0131 ve zil sesini bast\u0131r\u0131r; S\u0131n\u0131rl\u0131 a\u015f\u0131r\u0131 gerilim korumas\u0131 sa\u011flar; Sinyal kenarlar\u0131n\u0131 yava\u015flat\u0131r ve EMI'yi azalt\u0131r.<\/p>\n

      Sinyal b\u00fct\u00fcnl\u00fc\u011f\u00fc analizi: Veri yolu kapasitans\u0131n\u0131 varsayarsak: Cbus = 20pF; Zaman sabiti: \u03c4 = R \u00d7 C = 47\u03a9 \u00d7 20pF = 0,94ns, SPI saat frekans\u0131 \u00fczerindeki etkisi: Yakla\u015f\u0131k 50MHz'e kadar destekleyebilir.<\/p>\n

      (2) G\u00fc\u00e7 t\u00fcketimi hesaplamas\u0131<\/p>\n

      Dijital Pin Ak\u0131m\u0131 (Tipik):<\/p>\n

      Giri\u015f ka\u00e7ak ak\u0131m\u0131: \u00b110\u03bcA<\/p>\n

      47\u03a9'da g\u00fc\u00e7 t\u00fcketimi: P = I\u00b2 \u00d7 R = (10\u03bcA)\u00b2 \u00d7 47\u03a9 \u2248 4,7nW<\/p>\n

      \u0130hmal edilebilir<\/p>\n

      3.2.2 Filtre parametrelerinin hesaplanmas\u0131<\/p>\n

      (1) Diferansiyel filtre hesaplamas\u0131<\/p>\n

      Diferansiyel kesme frekans\u0131:<\/p>\n

      \"\"<\/p>\n

      \"\"<\/p>\n

      \"\"<\/p>\n

      Diferansiyel empedans:<\/p>\n

      \"\"<\/p>\n

      (2) Ortak mod filtre hesaplamalar\u0131<\/p>\n

      Ortak mod kesme frekans\u0131:<\/p>\n

      \"\"<\/p>\n

      \"\"<\/p>\n

      \"\"<\/p>\n

      Ortak Mod Empedans\u0131:<\/p>\n

      \"\"<\/p>\n

      3.2.3 Kapasitans oran\u0131 do\u011frulamas\u0131<\/p>\n

      C2 : C1 = 100nF : 10nF = 10:1, bu da oran\u0131n 10 kat\u0131 gereksinimlerini kesinlikle kar\u015f\u0131lar.<\/p>\n

      Ortak moddan diferansiyel bast\u0131rmaya: Ortak mod kapasit\u00f6r uyumsuzlu\u011fu varsay\u0131m\u0131: \u00b15%<\/p>\n

      Diferansiyel g\u00fcr\u00fclt\u00fc \u00fcretilir: V_cm_to_diff \u2248 V_cm \u00d7 (\u0394C\/C) \u2248 V_cm \u00d7 5%, bu etki kat\u0131 bir \u00f6l\u00e7ekte en aza indirilir.<\/p>\n

      3.3.3 Sistem Performans\u0131 Hesaplamas\u0131 (Harici 5V Referans Kullanarak)<\/p>\n

      (1) Sinyal aral\u0131\u011f\u0131 hesaplamas\u0131<\/p>\n

      Sens\u00f6r \u00d6zellikleri: Tam \u00d6l\u00e7ekli \u00c7\u0131k\u0131\u015f: Vout_max = 5V \u00d7 3mV\/V = \u00b115mV<\/p>\n

      PGA Kazan\u00e7 Se\u00e7imi: 128<\/p>\n

      Referans Voltaj\u0131: 5V (Harici)<\/p>\n

      Tam \u00f6l\u00e7ekli giri\u015f aral\u0131\u011f\u0131:<\/p>\n

      FSR = \u00b1Vref \/ Kazan\u00e7 = \u00b15V \/ 128 \u2248 \u00b139,06mV<\/p>\n

      Do\u011frulama: 15mV < 39,06mV, yeterli marj ile.<\/p>\n

      (2) \u00c7\u00f6z\u00fcn\u00fcrl\u00fck hesaplamalar\u0131<\/p>\n

      LSB Boyutu:<\/p>\n

      1 LSB = FSR \/ 2\u00b2\u00b3 = 39,06mV \/ 8.388.608 \u2248 4,66nV<\/p>\n

      Teorik \u00e7\u00f6z\u00fcn\u00fcrl\u00fck:<\/p>\n

      Gerilim \u00e7\u00f6z\u00fcn\u00fcrl\u00fc\u011f\u00fc = 4,66nV<\/p>\n

      Gravimetrik \u00e7\u00f6z\u00fcn\u00fcrl\u00fck = (1kg \/ 15mV) \u00d7 4,66nV \u2248 0,31\u03bcg<\/p>\n

      (3) Ger\u00e7ek do\u011fruluk hesaplamas\u0131<\/p>\n

      G\u00fcr\u00fclt\u00fc Performans\u0131 (@Gain 128, 20SPS):<\/p>\n

      Giri\u015f Referans G\u00fcr\u00fclt\u00fcs\u00fc: 0,09\u03bcVrms (tipik)<\/p>\n

      Tepe g\u00fcr\u00fclt\u00fcs\u00fc: yakla\u015f\u0131k 0,41 \u03bcVpp<\/p>\n

      A\u011f\u0131rl\u0131k \u00f6l\u00e7\u00fcm g\u00fcr\u00fclt\u00fcs\u00fc:<\/p>\n

      A\u011f\u0131rl\u0131k g\u00fcr\u00fclt\u00fcs\u00fc = (1kg \/ 15mV) \u00d7 0,09\u03bcV \u2248 6mg_RMS<\/p>\n

      G\u00fcr\u00fclt\u00fcs\u00fcz \u00e7\u00f6z\u00fcn\u00fcrl\u00fck \u2248 27mg_PP<\/p>\n

      <\/b>4. Yaz\u0131l\u0131m uygulamas\u0131<\/b><\/strong><\/p>\n

      4.1 Yap\u0131land\u0131rmay\u0131 ba\u015flat\u0131n:<\/b><\/strong><\/p>\n

      void configure_bridge_measurement(void) {<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0uint8_t config_regs[4] = {0};<\/strong><\/span><\/p>\n

      \u00a0 \u00a0 \/\/ MUX'u AIN1-AIN2 olarak ayarlay\u0131n, Kazan\u00e7=128, PGA etkin<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0config_regs[0] = SSP1x20_MUX_AIN3_AIN2 | SSP1x20_GAIN_128 | SSP1x20_PGA_BYPASS_OFF;<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\/\/ Veri h\u0131z\u0131 gibi di\u011fer parametreleri ayarlay\u0131n<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0config_regs[1] = SSP1x20_DR_20SPS | SSP1x20_MODE_NORMAL | SSP1x20_CC | SSP1x20_TS_OFF | SSP1x20_BCS_OFF;<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0\/\/ Referans voltaj\u0131 ve di\u011fer ayarlar<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0config_regs[2] = SSP1x20_VREF_REF0 | SSP1x20_REJECT_BOTH | SSP1x20_PSW_ON | SSP1x20_IDAC_OFF;<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0\/\/ DRDY modu<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0config_regs[3] = SSP1x20_IDAC1_OFF | SSP1x20_IDAC2_OFF | SSP1x20_DRDYM_DRDY;<\/strong><\/span><\/p>\n

      \u00a0<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\/\/ Kayda yaz<\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0SSP1x20_WriteRegister(SSP1x20_REG0, 4, config_regs);<\/strong><\/span><\/p>\n

      }<\/b><\/strong><\/span><\/p>\n

      4.2 Ham verileri okuma<\/b><\/strong><\/p>\n

      int32_t read_bridge_sensor_raw(void) {<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0<\/b><\/strong> uint32_t raw = SSP1x20_read_data_rdata();<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0<\/b><\/strong> if (raw & 0x800000) {<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b><\/strong> return (int32_t)(raw | 0xFF000000);<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0<\/b><\/strong> }<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0<\/b><\/strong> return (int32_t)raw;<\/b><\/strong><\/span><\/p>\n

      \u00a0 \u00a0 }<\/b><\/strong><\/span><\/p>\n

      4.3 <\/b><\/strong>S<\/b><\/strong>Helling<\/b><\/strong>\u00a0ve kalibrasyon<\/b><\/strong><\/p>\n

      \/\/ <\/b><\/strong>bombard\u0131man<\/b><\/strong><\/span><\/p>\n

      void tare_bridge_sensor(void) {<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0\u00a0SSP1X22_offset = read_bridge_sensor_raw();<\/b><\/strong><\/span><\/p>\n

      }<\/b><\/strong><\/span><\/p>\n

      \u00d6l\u00e7ek fakt\u00f6r\u00fcn\u00fc kalibre edin<\/b><\/strong><\/span><\/p>\n

      void calibrate_bridge_sensor(double known_weight) {<\/b><\/strong><\/span><\/p>\n

      \u00a0<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0tare_bridge_sensor()<\/b><\/strong>; \/\/<\/b><\/strong>\u00a0<\/b><\/strong>\u00d6nce temizleyin<\/b><\/strong><\/span><\/p>\n

      \u00a0<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0int32_t raw_data = read_bridge_sensor_raw();<\/b><\/strong><\/span><\/p>\n

      \u00a0<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0<\/b><\/strong>\/\/<\/b><\/strong>\u00a0<\/b><\/strong>\u00d6l\u00e7ek fakt\u00f6r\u00fcn\u00fcn hesaplanmas\u0131 (1000 g'a kar\u015f\u0131l\u0131k gelen ADC de\u011feri)<\/b><\/strong><\/span><\/p>\n

      \u00a0<\/b><\/strong><\/span><\/p>\n

      \u00a0\u00a0\u00a0\u00a0SSP1X22_scale = known_weight \/ (raw_data - SSP1X22_offset);<\/b><\/strong><\/span><\/p>\n

      }<\/b><\/strong><\/span><\/p>\n

      A\u00e7\u0131klanan temel parametreler<\/b><\/strong>:<\/b><\/strong><\/p>\n

      SSP1x20_PGA_BYPASS_OFF<\/span><\/p>\n

        \n
      1. PGA_BYPASS<\/li>\n<\/ol>\n

        Sadece 10~20 mV'luk bir k\u00f6pr\u00fc sens\u00f6r \u00e7\u0131k\u0131\u015f\u0131yla, 24 bit ADC'nin do\u011fruluk avantajlar\u0131ndan amplifikasyon olmadan yararlan\u0131lamaz.<\/p>\n

        Buff'lar\u0131 kullanmak i\u00e7in (\u00f6rn. 64, 128), bypass \u2192 PGA_BYPASS_OFF kapat\u0131lmal\u0131d\u0131r<\/strong><\/p>\n

        SSP1x20_MUX_AIN3_AIN2<\/span><\/p>\n

          \n
        1. MUX diferansiyel kanal se\u00e7imi<\/li>\n<\/ol>\n

          Wheatstone k\u00f6pr\u00fcs\u00fc \u00e7\u0131k\u0131\u015f\u0131 bir diferansiyel sinyaldir ve sens\u00f6r\u00fcn pozitif \u00e7\u0131k\u0131\u015f\u0131n\u0131n AIN3'e ve negatif \u00e7\u0131k\u0131\u015f\u0131n\u0131n AIN2'ye ba\u011fland\u0131\u011f\u0131ndan ve yaz\u0131l\u0131m\u0131n ilgili diferansiyel \u00e7ifti se\u00e7ti\u011finden emin olmak i\u00e7in diferansiyel giri\u015f modu kullan\u0131lmal\u0131d\u0131r.<\/p>\n

          SSP1x20_VREF_REF0 \/\/ yani REFP0-REFN0<\/span><\/p>\n

            \n
          1. VREF referans kayna\u011f\u0131<\/li>\n<\/ol>\n
              \n
            • \u00c7ekirde\u011fin fark\u0131na var\u0131n Rasyometrik \u00d6l\u00e7\u00fcm\u00fcn<\/strong>!\n
                \n
              • \u00a0REFP0'\u0131 sens\u00f6r\u00fcn uyarma voltaj\u0131n\u0131n pozitif ucuna ba\u011flay\u0131n (\u00f6rn. AVDD veya EXC+).<\/li>\n
              • REFN0 uyar\u0131m\u0131n negatif ucuna (GND) ba\u011flan\u0131r.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                \u2192 G\u00fc\u00e7 kayna\u011f\u0131 dalgalansa bile, ADC tam \u00f6l\u00e7e\u011fi sens\u00f6r \u00e7\u0131k\u0131\u015f\u0131yla ayn\u0131 oranda de\u011fi\u015fir ve\u00a0okumalar de\u011fi\u015fmeden kal\u0131r<\/strong>.<\/p>\n

                  \n
                • \u00a0Yanl\u0131\u015f sonu\u00e7lar<\/strong>:
                  \nDahili referanslar veya sabit VREF'ler kullan\u0131l\u0131rsa, g\u00fc\u00e7 dalgalanmas\u0131 do\u011frudan a\u011f\u0131rl\u0131k hatalar\u0131na d\u00f6n\u00fc\u015f\u00fcr.<\/li>\n<\/ul>\n

                  SSP1x20_DR_20SPS<\/span><\/p>\n

                    \n
                  1. Veri h\u0131z\u0131 DR<\/li>\n<\/ol>\n

                    \u0394\u03a3 ADC'ler do\u011fruluk ve h\u0131z ile de\u011fi\u015ftirilebilir:<\/p>\n

                      \n
                    • 20SPS \u2192 y\u00fcksek \u00e7\u00f6z\u00fcn\u00fcrl\u00fck (> 21 bit etkili), g\u00fc\u00e7l\u00fc g\u00fc\u00e7 frekans\u0131 reddi<\/li>\n
                    • 1000SPS \u2192 y\u00fcksek g\u00fcr\u00fclt\u00fc ve etkili bit say\u0131s\u0131 d\u00fc\u015ft\u00fc<\/li>\n<\/ul>\n

                      4.4 Anahtar algoritma mod\u00fcllerinin a\u00e7\u0131klamas\u0131<\/b><\/strong><\/p>\n

                      4.4.1 S<\/b><\/strong>Helling<\/b><\/strong><\/p>\n

                      void tare_bridge_sensor(void){<\/span><\/p>\n

                      SSP1X22_offset = read_bridge_sensor_raw();<\/span>
                      \n}<\/span><\/p>\n

                        \n
                      • Fonksiyon<\/strong>: S\u0131f\u0131r ofsetini ortadan kald\u0131r\u0131n (sens\u00f6r ba\u015flang\u0131\u00e7 dengesizli\u011fi, devre yanl\u0131\u015f hizalamas\u0131 vb. dahil).<\/li>\n
                      • \u00c7a\u011fr\u0131 zamanlamas\u0131<\/strong>: Sistem a\u00e7\u0131ld\u0131ktan sonra ve y\u00fcks\u00fcz olarak bir kez \u00e7al\u0131\u015ft\u0131r<\/li>\n<\/ul>\n

                        4.4.2 Ham Veri Okuma<\/b><\/strong><\/p>\n

                        int32_t read_bridge_sensor_raw(void){<\/span><\/p>\n

                        Uint32_t raw = SSP1X20_read_data_rdata();<\/span><\/p>\n

                        If (raw & 0x800000){<\/span><\/p>\n

                        D\u00f6n\u00fc\u015f (int32_t)(raw | 0xFF000000); Sembol geni\u015fletme<\/span><\/p>\n

                        }<\/span><\/p>\n

                        return (int32_t)raw;<\/span>
                        \n}<\/span><\/p>\n

                          \n
                        • 24 bit i\u015faretsiz veriyi i\u015faretli bir 32 bit tamsay\u0131<\/strong><\/li>\n
                        • Negatif de\u011ferleri i\u015fleme (en y\u00fcksek bit 1 oldu\u011funda sembol geni\u015fletme gereklidir)<\/li>\n<\/ul>\n

                          4.4.3 A\u011f\u0131rl\u0131k hesaplamas\u0131<\/b><\/strong><\/p>\n

                          double get_weight_from_bridge(double scale_factor){<\/span><\/p>\n

                          int32_t raw_data = read_bridge_sensor_raw();<\/span><\/p>\n

                          (raw_data - SSP1X22_offset) * scale_fator d\u00f6nd\u00fcr\u00fcr;<\/span><\/p>\n

                          }<\/span><\/p>\n

                            \n
                          • Temel form\u00fcl: \u0394Ham \u00d7 \u00d6l\u00e7ek = A\u011f\u0131rl\u0131k<\/li>\n
                          • \u00f6nce tare() \u00e7al\u0131\u015ft\u0131r\u0131lmal\u0131d\u0131r<\/strong>aksi takdirde ofset \u00e7al\u0131\u015fmayacakt\u0131r<\/li>\n<\/ul>\n

                            4.4.4 Kalibrasyon<\/b><\/strong><\/p>\n

                            viod calibrate_brifge_sensor(double known_weight){<\/span><\/p>\n

                            take_bridge_sensor(); 1. Bombard\u0131man<\/span><\/p>\n

                            HAL_Delay(10);<\/span><\/p>\n

                            int32_t raw_max = read_bridge_sensor_raw(); 2. Tam \u00f6l\u00e7ek de\u011ferini okuyun<\/span><\/p>\n

                            if (raw_max ==(int32_t)SSP1X22_offset){<\/span><\/p>\n

                            S\u0131f\u0131rlama hatalar\u0131n\u0131 \u00f6nler<\/span><\/p>\n

                            d\u00f6n\u00fc\u015f ;<\/span><\/p>\n

                            }<\/span><\/p>\n

                            SSP1X22_scale = known_weight \/ (raw_max - (int32_t)SSP1X22_offset);<\/span><\/p>\n

                            }<\/span><\/p>\n

                              \n
                            • \u00d6n Ko\u015ful<\/strong>: K\u00f6pr\u00fc manuel olarak ilgili bilinen_a\u011f\u0131rl\u0131k durumuna ayarlanm\u0131\u015ft\u0131r (\u00f6rn. 100g).<\/li>\n
                            • \u00c7\u0131kt\u0131<\/strong>:Optimum \u00d6l\u00e7ek de\u011ferini otomatik olarak hesapla<\/li>\n<\/ul>\n

                              Bu sistem, y\u00fcksek hassasiyetli k\u00f6pr\u00fc \u00f6l\u00e7\u00fcm\u00fcn\u00fc \u015fu yollarla ger\u00e7ekle\u015ftirir bombard\u0131man<\/strong>\u00a0+ do\u011frusal kalibrasyon<\/strong>. \u00c7ekirdek:<\/p>\n

                              Do\u011fru donan\u0131m k\u00f6pr\u00fc yap\u0131s\u0131 + makul yaz\u0131l\u0131m kalibrasyon s\u00fcreci = g\u00fcvenilir a\u011f\u0131rl\u0131k \u00e7\u0131kt\u0131s\u0131<\/strong><\/p>\n

                              Sadece \u015fundan emin olun:<\/p>\n

                                \n
                              1. K\u00f6pr\u00fc etkili bir diferansiyel voltaj \u00fcretebilir,<\/li>\n
                              2. Bombard\u0131man ve kalibrasyon ad\u0131mlar\u0131n\u0131 do\u011fru s\u0131rada uygulay\u0131n,<\/li>\n
                              3. \u00d6l\u00e7ek fakt\u00f6r\u00fc ger\u00e7ek fiziksel miktarla e\u015fle\u015fir,<\/li>\n<\/ol>\n

                                Sim\u00fcle edilmi\u015f veya ger\u00e7ek sens\u00f6r senaryolar\u0131nda kararl\u0131 bir \u015fekilde \u00e7al\u0131\u015fabilir.<\/p>\n

                                <\/b>5. Yayg\u0131n sorunlar ve \u00e7\u00f6z\u00fcmleri<\/b><\/strong><\/p>\n\n\n\n\n\n\n\n\n
                                Fenomen<\/td>\nOlas\u0131 nedenler<\/td>\n\u00c7\u00f6z\u00fcm<\/td>\n<\/tr>\n
                                Okuma de\u011feri her zaman s\u0131f\u0131rd\u0131r<\/td>\nKabuksuz \/ Sens\u00f6re g\u00fc\u00e7 verilmemi\u015f<\/td>\nUyarma gerilimini kontrol edin, dara() ger\u00e7ekle\u015ftirin.<\/td>\n<\/tr>\n
                                Veriler \u015fiddetli bir \u015fekilde s\u0131\u00e7r\u0131yor<\/td>\nG\u00fc\u00e7 kayna\u011f\u0131 g\u00fcr\u00fclt\u00fcs\u00fc \/ zay\u0131f topraklama<\/td>\nGeli\u015ftirilmi\u015f g\u00fc\u00e7 filtreleme, tek noktadan topraklama<\/td>\n<\/tr>\n
                                Negatif de\u011ferler g\u00f6r\u00fcnt\u00fclenir<\/td>\nAIN+ ve AIN- birbirinin tersidir<\/td>\nOUT+ ve OUT- Sens\u00f6rlerini De\u011fi\u015ftirin<\/td>\n<\/tr>\n
                                Okuma doygunlu\u011fu (maksimum)<\/td>\nGiri\u015f a\u015f\u0131r\u0131 \u00f6l\u00e7ek \/ Kazan\u00e7 \u00e7ok y\u00fcksek<\/td>\nKazanc\u0131 azalt\u0131n veya sens\u00f6r direncini kontrol edin<\/td>\n<\/tr>\n
                                \u015eiddetli s\u0131cakl\u0131k kaymas\u0131<\/td>\nS\u0131cakl\u0131k dengelemesi yok \/ dengesiz g\u00fc\u00e7 kayna\u011f\u0131<\/td>\nHarici VREF'lerden ka\u00e7\u0131nmak i\u00e7in oran \u00f6l\u00e7\u00fcmlerini kullan\u0131n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                \u00a0<\/b><\/strong><\/p>\n

                                Tam kod, teknik deste\u011fimizle ileti\u015fime ge\u00e7erek elde edilebilir. \u0130leti\u015fim +8618014203727<\/b><\/strong><\/p>\n

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

                                Modern end\u00fcstriyel \u00f6l\u00e7\u00fcm ve otomasyon kontrol\u00fcnde diren\u00e7 k\u00f6pr\u00fcs\u00fc sens\u00f6rleri, y\u00fcksek do\u011fruluk ve kararl\u0131l\u0131klar\u0131 nedeniyle a\u011f\u0131rl\u0131k, bas\u0131n\u00e7 ve gerinim gibi fiziksel b\u00fcy\u00fckl\u00fcklerin alg\u0131lanmas\u0131nda yayg\u0131n olarak kullan\u0131lmaktad\u0131r. Bununla birlikte, y\u00fcksek performansl\u0131 bir diren\u00e7 k\u00f6pr\u00fcs\u00fc \u00f6l\u00e7\u00fcm sisteminin nas\u0131l tasarlanaca\u011f\u0131 ve pratik uygulamalarda g\u00fcvenilirli\u011finin ve do\u011frulu\u011funun nas\u0131l sa\u011flanaca\u011f\u0131 bir\u00e7ok m\u00fchendis ve teknisyenin kar\u015f\u0131la\u015ft\u0131\u011f\u0131 bir zorluktur. <\/p>","protected":false},"author":8,"featured_media":3021,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[62],"tags":[332,307,286],"acf":[],"_links":{"self":[{"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/posts\/3007"}],"collection":[{"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/comments?post=3007"}],"version-history":[{"count":0,"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/posts\/3007\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/media\/3021"}],"wp:attachment":[{"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/media?parent=3007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/categories?post=3007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.siproin-ic.com\/tr\/wp-json\/wp\/v2\/tags?post=3007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}