Particle sensor that distinguishes between particles and bubbles

Details Particle sensor that distinguishes between particles and bubbles Particle sensor that distinguishes between particles and bubbles

1997-05-13

1999-07-06

Brock, Michael

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

310338, G01N 1506, G01N 2902

Patent

active

059200073

ABSTRACT:
A particle sensor includes a flow path of a fluid, having a fluid inlet and a fluid outlet, and a sensor element provided in said flow path, which comprises (a) a vibrating section having such a mass that is sensitive to the collision of solid particles contained in the fluid, with the vibrating section and (b) a detecting section for detecting the vibration of the vibrating section caused by said collision and converting the vibration to electric signals. The sensor has a means capable of selectively detecting any vibration of the vibrating section having a frequency higher than the primary resonance frequency of the sensor element. This particle sensor has improved sensitivity to solid particles and can distinguish the signals generated by collision of solid particles, from the signals generated by collision of bubbles, at a high accuracy.

REFERENCES:
patent: 3816773 (1974-06-01), Baldwin et al.
patent: 3841144 (1974-10-01), Baldwin
patent: 3854323 (1974-12-01), Hearn et al.
patent: 4131815 (1978-12-01), Boatright
patent: 4149415 (1979-04-01), Harbour
patent: 4240287 (1980-12-01), Mast et al.
patent: 5698931 (1997-12-01), Shibata et al.

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