Abstract: Method and system for calibrating a mass flow sensor. The mass flow sensor includes an impact sensor that receives an impact force due to collisions with a plurality of solid particles to generate an output signal. A model relates a mass flow input to the output signal. At least one measurable parameter is varied over a plurality of samples by varying a physical component of the mass flow sensor, and a generated output signal is received. The model can be calibrated based on the received output signal for each of the plurality of samples. A mass-flow input can also be estimated while simultaneously updating the model.

Abstract: A golf ball mark holder is secured to an intermediate material by placing a first clamping body and a second clamping body on opposite sides of the material. A first magnet is connected to the first clamping body and a second clamping body is connected to the second clamping body, causing the clamping bodies to become magnetically attracted to each other and clamp down upon the intermediate material. The first clamping body is ferrous, allowing it to be magnetized by the first magnet. The first clamping body is then capable of securing the golf ball marker, as the golf ball marker is magnetically attracted to the first clamping body. Through use of the first clamping body and second clamping body the golf ball mark holder along with the users golf ball marker can be secured to any intermediate material without disrupting or altering the intermediate material.

Abstract: Method and system for calibrating a mass flow sensor. The mass flow sensor includes an impact sensor that receives an impact force due to collisions with a plurality of solid particles to generate an output signal. A model relates a mass flow input to the output signal. At least one measurable parameter is varied over a plurality of samples by varying a physical component of the mass flow sensor, and a generated output signal is received. The model can be calibrated based on the received output signal for each of the plurality of samples. A mass-flow input can also be estimated while simultaneously updating the model.