Abstract: A method includes transmitting first wireless signals towards a conveyor belt having multiple layers of material. The first wireless signals penetrate one or more layers in the conveyor belt. The method also includes receiving second wireless signals that have interacted with the conveyor belt. The method further includes identifying a condition of the conveyor belt using the second wireless signals and outputting an indicator identifying the condition of the conveyor belt. Identifying the condition of the conveyor belt could include identifying a thickness of at least one of the layers in the conveyor belt. This could be done by identifying pulses in the second wireless signals and using time of flight calculations.

Abstract: A method includes transmitting first wireless signals towards a conveyor belt having multiple layers of material. The first wireless signals penetrate one or more layers in the conveyor belt. The method also includes receiving second wireless signals that have interacted with the conveyor belt. The method further includes identifying a condition of the conveyor belt using the second wireless signals and outputting an indicator identifying the condition of the conveyor belt. Identifying the condition of the conveyor belt could include identifying a thickness of at least one of the layers in the conveyor belt. This could be done by identifying pulses in the second wireless signals and using time of flight calculations.

Abstract: A method includes transmitting wireless signals toward material in a tank. The method also includes receiving first return wireless signals reflected off a surface of the material and identifying a level of the material in the tank using the first return wireless signals. The method further includes receiving second return wireless signals reflected off a bottom of the tank and determining whether the material has been adulterated using the level of the material in the tank and the second return wireless signals. Determining whether the material has been adulterated could include determining a dielectric constant of the material, determining a density of the material using the dielectric constant of the material, and comparing the determined density of the material against a specified density. Determining the dielectric constant of the material could include using a time between peaks associated with the first and second return wireless signals.