Flow meter using digital signals

Details Flow meter using digital signals Flow meter using digital signals

2007-05-22

2007-05-22

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Using differential pressure

Reexamination Certificate

active

11198838

ABSTRACT:
A flow meter outputs an electric signal of a position a float within a taper-shaped tube precisely. A taper-shaped tube is made of an approximately transparent material, is mounted approximately vertically, and circulates a fluid such as water or the like, and a float is arranged within the taper-shaped tube so as to displace in a vertical direction in correspondence to a flow rate of the fluid. An LED irradiates a light ray to the taper-shaped tube and the float, makes the light ray to transmit through the taper-shaped tube, and generates a transmitted light ray. The image sensor outputs a digital image of the float within the taper-shaped tube, and a control portion11executes an input process of the digital signal detects the position of the float, and outputs an electric signal showing a flow rate of the fluid.

REFERENCES:
patent: 2808580 (1957-10-01), Fuller
patent: 4630485 (1986-12-01), Wastl, Sr.
patent: 6591694 (2003-07-01), Tsai et al.
patent: 2001-221666 (2001-08-01), None

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