Abstract: A device, in particular, a pyranometer, for measuring solar irradiance, comprises a light detection means and a temperature measurement means, and for which the temperature measurement means is configured to measure the temperature of the light detection means, and a data processing means configured to determine the irradiance by taking into account, in situ, the temperature of the light detection means. An irradiance measurement system and an irradiance measurement method are also disclosed.

Abstract: The invention relates to a stress gauge of the type having an acoustic resonant structure, including a piezoelectric transducer (10) connected to a holder (20), the holder (20) including opposite the piezoelectric transducer (10) an imbedded reflecting portion (40). The imbedded reflecting portion (40) reflects the volume acoustic waves generated by the piezoelectric transducer (10) when it is excited according to a harmonic mode of the structure and propagating into said holder (20), the reflecting portion (40) being arranged at a distance from the piezoelectric transducer (10) such that the integral of the stress on the propagation distance of the volume acoustic waves up to their reflection is different from zero.

Abstract: Control of running conditions, and particularly physical parameters of tires are recommended to increase automobile safety. A sensor according to the invention is used to determine various factors such as the temperature or pressure of tires. The sensor is a hybrid resonant passive structure that may be integrated in the vehicle ground connection, and particularly in the rubber of the tire when it is manufactured.