Systems and methods for measuring ultraviolet exposure

A method for measuring ultraviolet (UV) exposure, comprising:

• measuring, by a UV sensor, a UV intensity reading, wherein light is guided by a light pipe towards the UV sensor, and an end of the light pipe is covered with a diffuser having an angle-dependent transmission function;
• acquiring, by an inertial measurement unit, movement data of the UV sensor;
• determining a solar incidence angle between a direction of the sun and a normal direction of the UV sensor;
• computing an estimation of a maximum UV intensity at normal incidence based on the UV intensity reading, the solar incidence angle, and the angle-dependent transmission function of the diffuser;
• and
• outputting a UV index based on the estimation of the maximum UV intensity at normal incidence.

A method for measuring ultraviolet (UV) exposure, comprising:

• measuring, by a UV sensor, a UV intensity reading, wherein light is guided by a light pipe towards the UV sensor, and an end of the light pipe is covered with a diffuser having an angle-dependent transmission function;
• acquiring, by an inertial measurement unit, movement data of the UV sensor;
• uploading the UV intensity reading and the movement data to a computer server system;
• determining, by the computer server system, a solar incidence angle between a direction of the sun and a normal direction of the UV sensor;
• computing, by the computer server system, an estimation of a maximum UV intensity at normal incidence based on the UV intensity reading, the solar incidence angle, and the angle-dependent transmission function of the diffuser;
• and
• determining, by the computer server system, a UV index based on the estimation of the maximum UV intensity at normal incidence.

A system for measuring ultraviolet (UV) exposure, comprising:

• an electronic sensor chip, the electronic sensor chip comprising
• a UV sensor that measures a UV intensity reading;
• an inertial measurement unit that acquires movement data of the UV sensor;
• and
• at least one processor;
• a light pipe that guides light towards the UV sensor;
• and
• a diffuser covering an end of the light pipe, the diffuser having an angle-dependent transmission function.