What material information is needed for Ultrasonic Thermometry?
The ultrasonic velocity expansion coefficient is the only material property needed to make temperature measurements. This parameter is measured in a lab under isothermal conditions, or can be inferred using a material’s coefficient of thermal expansion and bulk modulus change with temperature. IMS Inc. has a growing database of material parameters. While material shape and configuration can change the way ultrasound propagates through a material, the propagation path and material shape does not need to be known for thermal measurement.
