Cidra Corporate Services Inc.

Cidra Concrete Systems Inc.

John Biesak

Michael A Davis

Douglas H Loose

James M Sullivan

Charles Winston

Paul Dolan

David Vincent Newton

Alan D Kersey

Mark R Fernald

Timothy J Bailey

A system for sensing the volume and/or viscosity of a slurry (e.g., like concrete) contained in a rotating container or drum, having a sensor and a signal processor. The sensor is configured to attach inside a rotating container or drum having a known geometry, sense angular positions of the sensor and also sense associated entry and exit points when the sensor enters and exits the slurry, including concrete, contained in the rotating container or drum, and provide signaling containing information about the angular positions and the associated entry and exit points. The signal processor receives the signaling, and determines corresponding signaling containing information about a volumetric amount, or a viscosity, or both, of the slurry in the rotating container or drum, based upon the signaling received.

Techniques for sensing the viscosity of concrete in a rotating container

Apparatus is provided having an acoustic-based air probe with an acoustic source configured to provide an acoustic signal into a mixture of concrete; and an acoustic receiver configured to be substantially co-planar with the acoustic source, to respond to the acoustic signal, and to provide signaling containing information about the acoustic signal injected into the mixture of concrete.

Method and apparatus for providing real time air measurement applications in wet concrete using dual frequency techniques

Techniques for sensing the volume and/or viscosity of concrete in a rotating container

The invention provides a signal processor that receives a signal containing information about an acoustic signal that is generated by at least one acoustic transmitter, that travels through an aerated fluid in a container, and that is received by at least one acoustic receiver arranged in relation to the container, including inside the container; and determines the gas volume fraction of the aerated fluid based at least partly on the speed of sound measurement of the acoustic signal that travels through the aerated fluid in the container. The signal processor also sends an output signal containing information about the gas volume fraction of the aerated fluid. The signal processor may be configured together with at least one acoustic transmitter, the at least one acoustic receiver, or both.

Method and apparatus for determining GVF&#x2014;gas volume fraction&#x2014;for aerated fluids and liquids in flotation tanks, columns, drums, tubes, vats

Method and apparatus for providing real time air measurement applications in wet concrete

A technique related to a fermentation process; where a signal processor receives a signal containing information about an amount of entrained air in a mixture forming part of a fermentation process in a tank; and determines a level of foam in the tank based at least partly on the amount of entrained air in the mixture. The signal processor may also provide a control signal for controlling an amount of defoamer (or antiforming agent) added to the mixture in the tank so as to control the production of foam within the tank by controlling the amount of defoamer added to the mixture in the tank.

Use of gas void fraction measurement is the closed loop control of a fermentation process

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Durham, CT, United States of America

John Biesak