Transduser

Transduser (bahasa Inggris:transducer) adalah suatu alat yang dapat mengubah suatu bentuk energi ke bentuk energi lainnya. Bentuk-bentuk energi tersebut diantaranya seperti energi Listrik, mekanikal, elektromagnetik, cahaya, kimia, akustik (bunyi), dan panas. Pada umumnya, semua alat yang dapat mengubah atau mengkonversi suatu energi ke energi lainnya dapat disebut sebagai transduser.

Tabel pengelompokan transduser

Transduser pasif (daya dari luar)

Parameter listrik dan kelas transduser Prinsip kerja dan sifat alat Pemakaian alat
Potensiometer Perubahan nilai tahanan karena posisi kontak bergeser Tekanan, pergeseran/posisi
Strain gage Perubahan nilai tahanan akibat perubahan panjang kawat oleh tekanan dari luar Gaya, torsi, posisi
Transformator selisih (LVDT) Tegangan selisih dua kumparan primer akibat pergeseran inti trafo Tekanan, gaya, pergeseran
Gage arus pusar Perubahan induktansi kumparan akibat perubahan jarak plat Pergeseran, ketebalan

Transduser aktif (tanpa daya luar)

Parameter listrik dan kelas transduser Prinsip kerja dan sifat alat Pemakaian alat
Sel fotoemisif Emisi elektron akibat radiasi yang masuk pada permukaan fotemisif Cahaya dan radiasi
Photomultiplier Emisi elektron sekunder akibat radiasi yang masuk ke katode sensitif cahaya Cahaya, radiasi dan relay sensitif cahaya
Termokopel Pembangkitan ggl pada titik sambung dua logam yang berbeda akibat dipanasi Temperatur, aliran panas, radiasi
Generator kumparan putar (tachogenerator)

Perputaran sebuah kumparan di dalam medan magnet yang membangkitkan tegangan || Kecepatan, getaran

Piezoelektrik Pembangkitan ggl bahan kristal piezo akibat gaya dari luar Suara, getaran, percepatan, tekanan
Sel foto tegangan Terbangkitnya tegangan pada sel foto akibat rangsangan energi dari luar Cahaya matahari
Termometer tahanan (RTD)

Perubahan nilai tahanan kawat akibat perubahan temperatur || Temperatur, panas

Hygrometer tahanan Tahanan sebuah strip konduktif berubah terhadap kandungan uap air Kelembaban relatif
Termistor Penurunan nilai tahanan logam akibat kenaikan temperatur Suhu

Referensi

  • Mirabito, Michael & Morgenstern, Barbara."The New Communictions Technologies: Applications, Policy, and Impact" hal.15:2004. Focal Press Publications.
  • William D. Cooper. Instrumentasi Elektronik dan Teknik Pengukuran. hal 385: 1994. Erlangga. Jakarta

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