Icephobicity of a surface is defined by the value of the shear strength between the surface and the adhered ice on the surface. There are many techniques to measure icephobicity of a surface. A decent one offers to apply a shear force to an ice cube stuck to the surface, and measure maximum force needed to detach the ice. Ice Adhesion Test Machine is a device that applies a shear force and measures the shear stress between the ice and the surface, operating in desired temperature and analyzes the results in integrated software.
Check out Jikan IAT-40 specifications and features.