Patent ID: 11965837
Assignee: COMMAND ALKON INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 23:
24. A concrete mixer truck comprising:
a frame;
a drum rotatably mounted to the frame, the drum receiving fresh concrete and having a rotation axis at least partially horizontally oriented relative to the vertical;
a high energy photon source mounted to the drum, the high energy photon source emitting high energy photons towards a photon path rotating about the rotation axis as the drum rotates, the photon path being immersed in said fresh concrete for a given period of time during rotation of the drum;
a photon detector mounted to the drum and to which the photon path leads, the photon detector counting high energy photons received from the photon path at least during said period of time; and generating a signal indicative of a number of counted events;
a computing device communicatively coupled with the photon detector, the computing device determining an air content value of the fresh concrete based on the generated signal and on reference data associating reference numbers of counted events to corresponding reference air content values; comparing said determined air content value to an air content threshold; and generating an alert based on said comparison; and
a user interface communicatively coupled to the computing device and displaying said alert.