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

Claim 9:
10. A computer-implemented method for determining air content of fresh concrete received in a drum of a concrete mixer, the method comprising:
receiving a signal indicative of a number of events counted by a photon detector following a high-energy photon source emitting high energy photons along a photon path leading to the photon detector during rotation of the drum;
determining the number of events counted during a given period of time while the photon path is immersed in the fresh concrete received in the drum;
matching the determined number of events to an air content value of the fresh concrete based on reference data associating reference numbers of counted events to corresponding reference air content values;
comparing said air content value to an air content threshold;
generating an alert based on said comparison; and
displaying said alert.