| abstract |
A gyroscopic rotational monitoring system may be utilized for monitoring one or more properties of rotatable container or vessel (2), and/or one or more properties of a displaceable material contained in the rotatable vessels. An exemplary aspect relates to the use of a gyroscope (22) and periodicity sensor (e.g., accelerometer) (24) to determine rotational speed of a concrete mixing drum, so that the slump or other property of the concrete can be monitored or adjusted such as by dosing with water, chemical admixtures, or mixture thereof. |