US 11,995,981 B2
Apparatus and method for surface condition monitoring
Timo Hyvättinen, Helsinki (FI); Kimmo Kynnös, Helsinki (FI); Samuli Laukkanen, Helsinki (FI); and Joonas Kivi, Helsinki (FI)
Assigned to Vaisala Oyj, Vantaa (FI)
Filed by Vaisala Oyj, Vantaa (FI)
Filed on Oct. 9, 2020, as Appl. No. 17/066,508.
Claims priority of application No. 19218411 (EP), filed on Dec. 20, 2019.
Prior Publication US 2021/0192940 A1, Jun. 24, 2021
Int. Cl. G08G 1/01 (2006.01)
CPC G08G 1/0112 (2013.01) [G08G 1/0125 (2013.01); G08G 1/0145 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a normalized surface condition monitoring sensor configured to be attached to a vehicle,
a receiver configured to wirelessly receive dry references for different locations from a node, wherein values of the dry references originate from at least one normalized surface condition monitoring system, and wherein at least some of the values of the dry references are associated with position information obtained by at least one first external positioning system, and
a processing unit comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to:
store specific dry references received by the receiver for every different location in a dry reference map, and
process the stored specific dry references, based on a real time position of the apparatus to obtain position dependent continuous calibration of the surface condition monitoring sensor.