US 12,216,084 B2
Metal debris sensor for oil with temperature compensation
Bruno Dalvit, Arco (IT)
Assigned to DANA ITALIA S.R.L., Arco (IT)
Filed by DANA ITALIA S.R.L., Trentino (IT)
Filed on Mar. 18, 2022, as Appl. No. 17/655,457.
Prior Publication US 2023/0296562 A1, Sep. 21, 2023
Int. Cl. G01N 27/90 (2021.01); G01N 33/28 (2006.01)
CPC G01N 27/9006 (2013.01) [G01N 33/2858 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for metallic debris detection, comprising:
a detection circuit including a first inductor and a second inductor; and
an external case with the detection circuit housed therein, wherein the external case and the first inductor form a barrier between the second inductor and air and/or oil such that the second inductor is shielded from metal debris influences by the external case and by the first inductor, wherein the detection circuit generates an output based on a difference between a first voltage of the first inductor and a second voltage of the second inductor, where the difference indicates a presence of metallic debris within oil, and wherein the air and/or oil are external to the external case.