Transcript Document

PNÖMATİK
SENSÖRLER
TP101
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Sensörlerin sınıflandırılması
Sensörler:
Temaslı
• Temassız (proximity sensors)
Olarak sınıflandırılırlar.
Sanayide temassız olanlar daha çok kullanılırlar
•
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Limit Süviçler
Temaslı sensörlerdir.
Çıkış sinyali vermeleri için ikazlanmaları gerekir
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Sensörler
Optik-Hüzmeli
Endüktif
Optik - yansımalı
Manyetik
Optik Difüzer
Endüktif manyetik
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Kapasitif
Sembol
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İndüktif Sensör
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indüktif Sensör
Yüksek frekanslı manyetik saha
(300 to 800 kHz)
Aktif yüzey
Yankı kangalı
LED
Bağlantı kablosu
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Endüktif sensör
Her türlü iletken metali tespit ederler
Çeliği belli bir mesafeden tespit eder.
Performansı :
• Ortam sıcaklığı
• Hedef materyali
•Hedef ölçülerinden etkilenebilir.
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Manyetik Temassız sensör
Nitrojen dolu cam tüp
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LED
Reed kontakları
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Reed switch
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Reed switch
24v
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Reed switch
24v
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Reed switch
Diğer manyetik alanlardan uzak tutulmalıdır
Orta konum için yerleştirilmiş ise yaklaşım yönüne göre algılama mesafesi değişebilir.
Reed kontakların yanmaması için maksimum akım limitlenmelidir.
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İndüktif Manyetik Sensör
Bağlantı kablosu
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Algı bobini
Yüksek frekanslı
manyetik alan
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LED
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Inductive magnetic sensor
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Inductive magnetic sensor
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İndüktif manyetik sensör
Sadece manyetik alanları teşhis eder
Diğer manyetik alanların etki sahasından uzak olmalıdır
Yüksek frekans - 1kHz
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Kapasitif Sensör
Alandaki kapasitif değişikliği saptar
Elektrostatik yüzey
Aktif yüzey
Aktif elektrod
Arz elektrodu
LED
Ayar vidası
Bağlantı kablosu
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Capacitive sensor
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Target
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Capacitive sensor
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Capacitive sensor
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Capacitive sensor
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Capacitive sensor
Detects any material denser than air (as long as there is enough of
it)
Can be adjusted for sensitivity
Can be affected by dusty environments
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Capacitive sensor
Sensor is adjusted so that it does not
‘see’ the wall of the vessel.
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Capacitive sensor
As the level rises the fluid affects the sensor
field.
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Capacitive sensor
Until the sensor switches.
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Sensör sembolleri
İndüktif
Kapasitif
+ 18 to 30 Volts DC.
Optik
Çıkış
Manyetik
Ultrasonik
Normalde açık
0V
Normalde kapalı
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Sensor connection
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