| 摘要 |
Attorney Docket No: 3306 Reference: 22,184 THERMOGRAPHIC METHOD FOR DETERMINING THE VOLUME OF CONCRETE IN A MIXING CONTAINER John O. de Mars The present invention relates to a method for determining the level of concrete in a concrete mixer comprising the steps of contacting the exterior of concrete mixing drum with a strip of thermal color sensitive material and observing the interface on the color sensitive material produced by the temperature differential between the concrete and the air above. This level can then be lined up horizontally with a graduated volume indicator, to yield the concrete volume in the truck. WPHBC/ID23/1-13
|
