Patent ID: 9151656
Filing Date: 2015-10-06
Classification: G01F

Abstract:
1. A self-alignment filling level sensing device comprising: a reflector comprising: a tubular body having a first end and a second end; a reflection head mounted on the first end of the tubular body and having a V-shaped cross section with two opposite reflection faces; and a connecting portion formed at the second end of the tubular body; a sensor comprising: a body being hollow and having a first end, a second end opposite to the first end, and an opening formed at the first end; a linking tube protruding from the second end of the body and mounted in the reflector; a screwing sleeve mounted around the linking tube and detachably engaged with the connecting portion; a circuit board mounted in the body of the sensor and having a light emitter, a light senor and a controller; and a light isolator movably mounted in the linking tube; wherein the controller determines whether the reflector has been accurately engaged with the sensor according to light intensity received by the light sensor, wherein the light isolator is a partition plate, is axially mounted in the linking tube, and has a through hole formed through the light isolator; and the light isolator is movably configured at a predetermined position in the linking tube to isolate light beams emitted from the light emitter from impinging on the light sensor when the reflector has been accurately engaged with the sensor.