Chip level indicator with differential transformer

Details Chip level indicator with differential transformer Chip level indicator with differential transformer

G - Physics

01

F

73/69

G01F 23/18 (2006.01) G01F 23/00 (2006.01) G01F 23/26 (2006.01)

Patent

CA 1320846

ABSTRACT A solids level detecting assembly is particularly useful for detecting the level of paper pulp (or wood chips during the manufacture of pulp) in a vertical vessel. A first hollow shaft is affixed at a portion thereof to a vessel with a first end extending into the vessel. A second shaft, concentric with the first, is disposed within it and connected at a first end thereof to the first end of the hollow shaft, and to a paddle (plate). A sensing device, including a movable core element of high magnetic permeability material, is mounted to a free end of the second shaft. A stationary core element is mounted adjacent the movable element so that a twisting motion of the first shaft as a result of solid particles acting on the plate changes the flux in the core elements. A flux detector (comprising a pair of coils and a voltage detector) detects the changes in magnetic flux in the core elements, and indicates the change on an indicator, which thus illustrates the level of pulp or chips within the vessel.

613389

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