Liquid level monitoring and reporting system

摘要

An assembly includes a reservoir, a first sensor, a second sensor, and a controller. The first and second sensors are positioned in the reservoir. The controller is connected to both the first and second sensors. The controller sends a full signal when the first sensor indicates that liquid level in the reservoir is at or above a first level. The controller sends a fill signal when the second sensor indicates that liquid level in the sump is at or below a second level. The controller sends an approximate oil level signal with a value estimated based upon elapsed operating time since the reservoir was at or above the first level.

主权项

1. An assembly for an auxiliary power unit (APU) gas turbine engine, comprising:
a gearbox having a sump; an electrical generator drivingly connected to the gearbox; a first sensor positioned in the sump; a second sensor positioned in the sump; and a controller connected to both the first and second sensors, wherein the controller outputs a full signal when the first sensor indicates that liquid level in the sump is at or above a first level, wherein the controller outputs a fill signal when the second sensor indicates that liquid level in the sump is at or below a second level, and wherein the controller outputs an approximate oil level signal with a value estimated based upon elapsed operating time since the sump was at or above the first level.